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Cover - USD ($)	12 Months Ended
Cover - USD ($)	Dec. 31, 2019	Jan. 31, 2020	Jun. 30, 2019
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity Address, Country	US
Entity Central Index Key	0000101829
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Entity File Number	1-812
Entity Registrant Name	UNITED TECHNOLOGIES CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	06-0570975
Entity Address, Address Line One	10 Farm Springs Road,
Entity Address, City or Town	Farmington,
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06032
City Area Code	(860)
Local Phone Number	728-7000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 112,271,798,129
Entity Common Stock, Shares Outstanding		865,308,981
Documents Incorporated by Reference [Text Block]	DOCUMENTS INCORPORATED BY REFERENCE Parts I, II and IV hereof incorporate by reference portions of the United Technologies Corporation 2019 Annual Report to Shareowners. Part III hereof incorporates by reference portions of the United Technologies Corporation Proxy Statement for the 2020 Annual Meeting of Shareowners.
Common Stock [Member]
Document Information [Line Items]
Title of 12(b) Security	Common Stock ($1 par value)
Trading Symbol	UTX
Security Exchange Name	NYSE
Notes 1.125% Due 2021 [Member]
Document Information [Line Items]
Title of 12(b) Security	1.125% Notes due 2021
Trading Symbol	UTX 21D
Security Exchange Name	NYSE
Notes 1.250% due 2023 [Member]
Document Information [Line Items]
Title of 12(b) Security	1.250% Notes due 2023
Trading Symbol	UTX 23
Security Exchange Name	NYSE
Notes 1.150% Due 2024 [Member]
Document Information [Line Items]
Title of 12(b) Security	1.150% Notes due 2024
Trading Symbol	UTX 24A
Security Exchange Name	NYSE
Notes 1.875% Due 2026 [Member]
Document Information [Line Items]
Title of 12(b) Security	1.875% Notes due 2026
Trading Symbol	UTX 26
Security Exchange Name	NYSE
Notes 2.150% Due 2030 [Member]
Document Information [Line Items]
Title of 12(b) Security	2.150% Notes due 2030
Trading Symbol	UTX 30
Security Exchange Name	NYSE
Floating Rate Notes Due2020 [Member]
Document Information [Line Items]
Title of 12(b) Security	Floating Rate Notes due 2020
Trading Symbol	UTX 20B
Security Exchange Name	NYSE

Consolidated Statement of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 77,046	$ 66,501	$ 59,837
Costs and Expenses:
Research and development	3,015	2,462	2,427
Selling, general and administrative	8,521	7,066	6,429
Total costs and expenses	68,601	59,513	53,057
Other Income	521	1,565	1,358
Operating profit	8,966	8,553	8,138
Non-service pension cost (benefit)	(888)	(765)	(534)
Interest Expense, net	1,611	1,038	909
Income from continuing operations before income taxes	8,243	8,280	7,763
Income tax expense	2,295	2,626	2,843
Net income from continuing operations	5,948	5,654	4,920
Less: Noncontrolling interest in subsidiaries' earnings from continuing operations	411	385	368
Net income attributable to common shareowners	$ 5,537	$ 5,269	$ 4,552
Earnings Per Share of Common Stock - Basic:
Net income attributable to common shareowners	$ 6.48	$ 6.58	$ 5.76
Earnings Per Share of Common Stock - Diluted:
Net income attributable to common shareowners	6.41	6.50	5.70
Dividends Per Share of Common Stock	$ 2.94	$ 2.84	$ 2.72
Weighted average number of shares outstanding:
Basic shares	854,800,000	800,400,000	790,000,000.0
Diluted shares	863,900,000	810,100,000	799,100,000
Product [Member]
Revenues	$ 54,004	$ 45,434	$ 41,361
Costs and Expenses:
Cost of Goods and Services Sold	42,444	36,754	31,224
Service [Member]
Revenues	23,042	21,067	18,476
Costs and Expenses:
Cost of Goods and Services Sold	$ 14,621	$ 13,231	$ 12,977

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income from continuing operations	$ 5,948	$ 5,654	$ 4,920
Net income	5,948	5,654	4,920
Foreign currency translation adjustments
Foreign currency translation adjustments arising during period	266	(516)	620
Reclassification adjustments for from sale of an investment in a foreign entity recognized in net income	(2)	2	10
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	268	(518)	610
Tax expense (benefit)	43	4	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	225	(522)	610
Change in pension and post-retirement benefit plans
Net actuarial (loss) gain arising during period	(543)	(1,819)	241
Prior service cost (credit) arising during period	6	22	(2)
Amortization of prior service credit	228	344	529
Other	(93)	105	(116)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent	(414)	(1,392)	656
Tax expense (benefit)	(97)	(326)	263
Other Comprehensive Income (Loss), Defined Benefit Plan, after Reclassification Adjustment, after Tax	(317)	(1,066)	393
Unrealized gain (loss) on available-for-sale securities
Unrealized holding gain arising during period	0	0	5
Reclassification adjustments for gain included in Other income, net	0	0	566
Other Comprehensive Income (Loss), ASU 2016-01 adoption impact on Securities Arising During Period	0	(5)	0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent	0	(5)	(561)
Tax expense (benefit)	0	0	(213)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	0	(5)	(348)
Change in unrealized cash flow hedging
Unrealized cash flow hedging gain (loss) arising during period	(33)	(307)	347
Gain (Loss) reclassified into Product sales	(51)	16	39
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Parent	18	(323)	308
Tax expense (benefit)	11	(78)	74
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent	7	(245)	234
Other comprehensive (loss) income, net of tax	(85)	(1,838)	889
Comprehensive income	5,863	3,816	5,809
Less: Comprehensive income attributable to noncontrolling interest	399	355	448
Comprehensive income atrributable to common shareowners	$ 5,464	$ 3,461	$ 5,361

Consolidated Balance Sheet - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 7,378	$ 6,152
Accounts receivable (net of allowance for doubtful accounts of $389 and $488)	13,524	14,271
Contract with Customer, Asset, Net, Current	4,184	3,486
Inventory, net	10,950	10,083
Other assets, current	1,461	1,511
Total Current Assets	37,497	35,503
Customer financing assets	3,477	3,023
Future income tax benefits	1,611	1,646
Fixed assets, net	12,755	12,297
Operating Lease, Right-of-Use Asset	2,599	0
Goodwill	48,063	48,112
Intangible assets, net	26,046	26,424
Other assets	7,668	7,206
Total Assets	139,716	134,211
Liabilities and Equity
Short-term borrowings	2,364	1,469
Accounts payable	10,809	11,080
Accrued liabilities	11,737	10,223
Contract with Customer, Liability, Current	6,180	5,720
Long-term debt currently due	3,496	2,876
Total Current Liabilities	34,586	31,368
Long-term debt	37,788	41,192
Future pension and postretirement benefit obligations	3,502	4,018
Operating Lease, Liability, Noncurrent	2,144	0
Contract with Customer, Liability, Noncurrent	5,732	5,069
Other long-term liabilities	11,638	11,845
Total Liabilities		93,492
Redeemable noncontrolling interest		109
Capital Stock:
Preferred Stock, $1 par value; 250,000 shares authorized; None issued or outstanding	0	0
Common Stock, $1 par value; 4,000,000 shares authorized; 1,450,845 and 1,446,961 shares issued	23,019	22,514
Treasury Stock— 586,479 and 585,479 common shares at average cost	32,626	32,482
Retained earnings	61,594	57,823
Unearned ESOP shares	64	76
Total Accumulated other comprehensive loss	(10,149)	(9,333)
Total Shareowners' Equity	41,774	38,446
Noncontrolling interest	2,457	2,164
Total Equity	44,231	40,610
Total Liabilities and Equity	139,716	134,211
Allowance for doubtful accounts	$ 389	$ 488
Preferred Stock, par value	$ 1
Preferred Stock. shares authorized	250,000
Common Stock, par value	$ 1
Common Stock, shares authorized	4,000,000
Common Stock, Shares, Issued	1,450,845	1,446,961
Treasury Stock, shares	586,479	585,479

Consolidated Balance Sheet (Parenthetical) - shares shares in Millions	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred Stock, shares issued	0	0

Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Activities of Continuing Operations:
Income from continuing operations	$ 5,948	$ 5,654	$ 4,920
Adjustments to reconcile income from continuing operations to net cash flows provided by operating activities of continuing operations:
Depreciation and amortization	3,783	2,433	2,140
Deferred income tax provision	35	735	62
Stock compensation cost	356	251	192
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(525)	(393)	(158)
Portfolio separation tax cost	634	0	0
Gain on sale of Taylor Company	0	799	0
Change in:
Accounts receivable	(419)	2,426	448
Contract assets, current	307	604	0
Inventory	1,216	537	1,074
Other current assets	309	(161)	101
Accounts payable and accrued liabilities	1,229	2,446	1,571
Contract liabilities, current	359	205	0
Income Taxes	(406)	(195)	1,579
Global pension contributions	118	147	2,112
Canadian Government Settlement	(38)	(429)	(285)
Other operating activities, net	961	33	655
Net Cash Provided by Operating Activities, Continuing Operations	8,883	6,322	5,631
Investing Activities of Continuing Operations:
Capital expenditures	2,256	1,902	2,014
Increase in customer financing assets	787	988	1,197
Decrease in customer financing assets	129	606	222
Investments in businesses	56	15,398	231
Dispositions of businesses	138	1,105	70
Proceeds from the sale of the investment in Watsco Inc.	0	0	596
Increase in collaboration intangible assets	351	400	380
Payments (receipts) from settlements of derivative contracts	(336)	(143)	317
Other investing activities, net	245	139	(232)
Net cash flows used in investing activities of continuing operations	(3,092)	(16,973)	(3,019)
Financing Activities of Continuing Operations:
Issuance of long-term debt	88	13,455	4,954
Repayment of long-term debt	2,830	2,520	1,604
(Decrease) increase in short-term borrowings, net	927	(356)	(271)
Common Stock issued under employee stock plans	27	36	31
Dividends paid on Common Stock	2,442	2,170	2,074
Repurchase of Common Stock	151	325	1,453
Other financing activities, net	(183)	(155)	(576)
Net cash flows provided by (used in) financing activities of continuing operations	(4,564)	7,965	(993)
Effect of foreign exchange rate changes on cash and cash equivalents	(19)	(120)	210
Net (decrease) increase in cash and cash equivalents	1,208	(2,806)	1,829
Cash and Cash Equivalents, beginning of period	6,212	9,018	7,189
Cash and Cash Equivalents, end of period	7,420	6,212	9,018
Cash and cash equivalents of continuing operations, end of year	7,378	6,152	8,985
Supplemental Disclosure of Cash Flow Information:
Interest paid, net of amounts capitalized	1,801	1,027	974
Income taxes paid, net of refunds	1,768	1,714	1,326
Restricted Cash And Cash Equivalents	$ 42	$ 60	$ 33

Consolidated Statement of Changes in Equity - USD ($) shares in Thousands, $ in Millions	Total	ASU 2014-09 [Member]	Common Stock [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Unearned ESOP Shares [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Noncontrolling Interest
Increase (Decrease) In Equity [Roll Forward]
Stockholders' Equity Attributable to Parent			$ 17,285	$ (34,150)	$ 52,873	$ (95)	$ (8,334)
Noncontrolling interest								$ 1,590
Total Equity	$ 29,169
Common Stock issued under employee plans			331	7		10
Common Stock repurchased			(1)	1,453
Common Stock issued for Rockwell Collins			0	0
Purchase (sale) of subsidiary shares from noncontrolling interest			(4)
Redeemable noncontrolling interest fair value adjustment			(47)		(42)
Net Income - Retained Earnings	$ 4,552				4,552
Dividends on Common Stock					2,074
Dividends on ESOP Common Stock					72
Other		$ 0			5			1
Other comprehensive income (loss), net of tax - AOCI							809
Net Income - NCI								368
Redeemable Noncontrolling Interest in subsidiaries' earnings								17
Other comprehensive income (loss), net of tax - NCI								56
Dividends attributable to noncontrolling interest								336
Sale (purchase) of subsidiary shares in noncontrolling interest								0
Acquisition (disposition) of noncontrolling interest								14
Noncontrolling Interest, Increase from Capital Contributions								135
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	3,205
Stock Repurchased During Period, Shares	12,900
Dividends Per Share of Common Stock	$ 2.72
Stockholders' Equity Attributable to Parent			17,574	(35,596)	55,242	(85)	(7,525)
Noncontrolling interest								1,811
Total Equity	$ 31,421
Common Stock issued under employee plans			423	6		9
Common Stock repurchased			0	329
Common Stock issued for Rockwell Collins			4,523	3,437
Purchase (sale) of subsidiary shares from noncontrolling interest			6
Redeemable noncontrolling interest fair value adjustment			0		7
Net Income - Retained Earnings	$ 5,269				5,269
Dividends on Common Stock					2,170
Dividends on ESOP Common Stock					71
Other		(480)			26			6
Other comprehensive income (loss), net of tax - AOCI							(1,808)
Net Income - NCI								385
Redeemable Noncontrolling Interest in subsidiaries' earnings								4
Other comprehensive income (loss), net of tax - NCI								(30)
Dividends attributable to noncontrolling interest								315
Sale (purchase) of subsidiary shares in noncontrolling interest								(23)
Acquisition (disposition) of noncontrolling interest								(8)
Noncontrolling Interest, Increase from Capital Contributions								342
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	2,775
Stock Repurchased During Period, Shares	2,727
Dividends Per Share of Common Stock	$ 2.84
Stockholders' Equity Attributable to Parent	$ 38,446		22,514	(32,482)	57,823	(76)	(9,333)
Noncontrolling interest	2,164							2,164
Total Equity	40,610
Common Stock issued under employee plans			525	7		12
Common Stock repurchased			0	151
Common Stock issued for Rockwell Collins			0	0
Purchase (sale) of subsidiary shares from noncontrolling interest			20
Redeemable noncontrolling interest fair value adjustment			0		4
Net Income - Retained Earnings	$ 5,537				5,537
Dividends on Common Stock					2,442
Dividends on ESOP Common Stock					70
Other		$ 0			(3)			0
Other comprehensive income (loss), net of tax - AOCI							(816)
Net Income - NCI								411
Redeemable Noncontrolling Interest in subsidiaries' earnings								(7)
Other comprehensive income (loss), net of tax - NCI								(12)
Dividends attributable to noncontrolling interest								268
Sale (purchase) of subsidiary shares in noncontrolling interest								70
Acquisition (disposition) of noncontrolling interest								(23)
Noncontrolling Interest, Increase from Capital Contributions								108
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture	3,883
Stock Repurchased During Period, Shares	1,133
Dividends Per Share of Common Stock	$ 2.94
Stockholders' Equity Attributable to Parent	$ 41,774		$ 23,019	$ (32,626)	$ 61,594	$ (64)	$ (10,149)
Noncontrolling interest	2,457							$ 2,457
Total Equity	$ 44,231

Accumulated Other Comprehensive Income

12 Months Ended

Dec. 31, 2019

Stockholders' Equity Note [Abstract]

AOCI Note Disclosure [Text Block]

A summary of the changes in each component of Accumulated other comprehensive (loss) income, net of tax for the years ended December 31, 2019 and 2018 is provided below:


(dollars in millions)	Foreign Currency Translation		Defined Benefit Pension and Postretirement Plans		Unrealized Gains (Losses) on Available-for- Sale Securities		Unrealized Hedging (Losses) Gains		Accumulated Other Comprehensive (Loss) Income
Balance at December 31, 2017	$	(2,950)	$	(4,652)	$	5	$	72	$	(7,525)
Other comprehensive income before reclassifications, net	(486)		(1,736)		—		(307)		(2,529)
Amounts reclassified, pre-tax	(2)		344		—		(16)		326
Tax (expense) benefit	(4)		326		—		78		400
ASU 2016-01 adoption impact	$	—	$	—	$	(5)	$	—	$	(5)
Balance at December 31, 2018	$	(3,442)	$	(5,718)	$	—	$	(173)	$	(9,333)
Other comprehensive loss before reclassifications, net	280		(584)		—		(33)		(337)
Amounts reclassified, pre-tax	2		170		—		51		223
Tax (expense) benefit	(43)		97		—		(11)		43
ASU 2018-02 adoption impact	(8)		(737)		—		—		(745)
Balance at December 31, 2019	$	(3,211)	$	(6,772)	$	—	$	(166)	$	(10,149)

In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (Topic 220). The new standard allows companies to reclassify to retained earnings the stranded tax effects in Accumulated other comprehensive income (AOCI) from the TCJA. We elected to reclassify the income tax effects of TCJA from AOCI of $745 million to retained earnings, effective January 1, 2019.

In January 2016, the FASB issued ASU 2016-01, Financial Instruments - Overall: Recognition and Measurement of Financial Assets and Financial Liabilities. This ASU modifies how entities measure equity investments and present changes in the fair value of financial liabilities. Upon adoption, investments that do not result in consolidation and are not accounted for under the equity method generally must be carried at fair value, with changes in fair value recognized in net income. We had approximately $5 million of unrealized gains on these securities recorded in Accumulated other comprehensive loss in our Consolidated Balance Sheet as of December 31, 2017. We adopted this standard effective January 1, 2018, with these amounts recorded directly to retained earnings as of that date.

Amounts reclassified that relate to our defined benefit pension and postretirement plans include the amortization of prior service costs and actuarial net losses recognized during each period presented. These costs are recorded as components of net periodic pension cost for each period presented. Additionally, during 2019, we recorded a curtailment gain of $98 million in the Consolidated Statement of Operations which is included within amounts reclassified related to our defined pension and postretirement plans (see Note 12 for additional details).

All noncontrolling interests with redemption features, such as put options, that are not solely within our control (redeemable noncontrolling interests) are reported in the mezzanine section of the Consolidated Balance Sheet, between liabilities and equity, at the greater of redemption value or initial carrying value.

Performance Graph - Unaudited	12 Months Ended
Performance Graph - Unaudited	Dec. 31, 2019
Performance Graph [Abstract]
Cumulative Total Shareholder Return [Text Block]	PERFORMANCE GRAPH (UNAUDITED) The following graph presents the cumulative total shareholder return for the five years ending December 31, 2019 for our common stock, as compared to the Standard & Poor's 500 Stock Index and to the Dow Jones 30 Industrial Average. Our common stock price is a component of both indices. These figures assume that all dividends paid over the five-year period were reinvested, and that the starting value of each index and the investment in common stock was $100.00 on December 31, 2014.

Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2019

Stockholders' Equity Note [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

A summary of the changes in each component of Accumulated other comprehensive (loss) income, net of tax for the years ended December 31, 2019 and 2018 is provided below:


(dollars in millions)	Foreign Currency Translation		Defined Benefit Pension and Postretirement Plans		Unrealized Gains (Losses) on Available-for- Sale Securities		Unrealized Hedging (Losses) Gains		Accumulated Other Comprehensive (Loss) Income
Balance at December 31, 2017	$	(2,950)	$	(4,652)	$	5	$	72	$	(7,525)
Other comprehensive income before reclassifications, net	(486)		(1,736)		—		(307)		(2,529)
Amounts reclassified, pre-tax	(2)		344		—		(16)		326
Tax (expense) benefit	(4)		326		—		78		400
ASU 2016-01 adoption impact	$	—	$	—	$	(5)	$	—	$	(5)
Balance at December 31, 2018	$	(3,442)	$	(5,718)	$	—	$	(173)	$	(9,333)
Other comprehensive loss before reclassifications, net	280		(584)		—		(33)		(337)
Amounts reclassified, pre-tax	2		170		—		51		223
Tax (expense) benefit	(43)		97		—		(11)		43
ASU 2018-02 adoption impact	(8)		(737)		—		—		(745)
Balance at December 31, 2019	$	(3,211)	$	(6,772)	$	—	$	(166)	$	(10,149)

Performance Graph - Unaudited (Tables)	12 Months Ended
Performance Graph - Unaudited (Tables)	Dec. 31, 2019
Performance Graph [Abstract]
Cumulative Total Shareholder Return [Table Text Block]	COMPARISON OF CUMULATIVE FIVE YEAR TOTAL RETURN

Summary of Changes in AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (10,149)	$ (9,333)
Other comprehensive (loss) income, net - Foreign Currency Translation	266	(516)
Amounts reclassified, pretax - Foreign Currency Translation	(2)	2
Tax (benefit) expense reclassified - Foreign Currency Translation	43	4
Other comprehensive (loss) income before reclassifications, net - Pension	(584)	(1,736)
Amounts reclassified, pretax - Pension	228	344
Tax (benefit) expense reclassified - Pension	(97)	(326)
Other comprehensive (loss) income before reclassifications, net - AFS Securities	0	0
Amounts reclassified, pretax - AFS Securities	0	0
Tax (benefit) expense reclassified - AFS Securities	0	0
Other Comprehensive Income (Loss), ASU 2016-01 adoption impact on Securities Arising During Period	0	(5)
Other comprehensive (loss) income before reclassifications, net - Unrealized Hedging (Losses) Gains	(33)	(307)
Amounts reclassified, pretax - Unrealized Hedging (Losses) Gains	(51)	16
Tax (benefit) expense reclassified - Unrealized Hedging (Losses) Gains	11	(78)
Other comprehensive (loss) income before reclassifications, net	(337)	(2,529)
Amounts reclassified, pretax	(223)	(326)
Tax (benefit) expense reclassified	(43)	(400)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	170
Other Comprehensive Income (Loss), ASU 2018-02 adoption impact on foreign currency translation Arising During Period	(8)
Other Comprehensive Income (Loss), ASU 2018-02 adoption impact on Defined Benefit Plan Arising During Period	(737)
Other Comprehensive Income (Loss), ASU 2018-02 adoption impact on Derivatives Arising During Period	0
Reclassification from OCI, current period, ASU 2018-02 adoption impact	(745)
Other Comprehensive Income (Loss), ASU 2018-02 adoption impact on Securities Arising During Period	0
Pension Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified, pretax - Pension	17
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]
Net settlement and curtailment gain (loss)	54	(1)
UNITED STATES \| Pension Plan [Member]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]
Net settlement and curtailment gain (loss)	98
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(3,211)	(3,442)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(6,772)	(5,718)
Accumulated Net Unrealized Gain (Loss) on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	0	0
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(166)	(173)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) income, net - Foreign Currency Translation	$ (280)	$ 486

Performance Graph - Unaudited (Details) - USD ($)	12 Months Ended
Performance Graph - Unaudited (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
United Technologies Corporation
Performance Graph [Line Items]
December, Graph Details	$ 105.03	$ 123.08	$ 103.37	$ 88.32	$ 103.19	$ 100
S&P 500 Index
Performance Graph [Line Items]
December, Graph Details	150.33	157.22	129.05	115.26	113.69	100
Dow Jones Industrial Average
Performance Graph [Line Items]
December, Graph Details	$ 158.85	$ 164.58	$ 128.47	$ 110.28	$ 110.04	$ 100

Summary of Accounting Principles

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Summary of Accounting Principles

SUMMARY OF ACCOUNTING PRINCIPLES

The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. Actual results could differ from those estimates. Certain reclassifications have been made to the prior year amounts to conform to the current year presentation.

Consolidation. The Consolidated Financial Statements include the accounts of United Technologies Corporation (UTC) and its controlled subsidiaries. Intercompany transactions have been eliminated.

Cash and Cash Equivalents. Cash and cash equivalents includes cash on hand, demand deposits and short-term cash investments that are highly liquid in nature and have original maturities of three months or less.

On occasion, we are required to maintain cash deposits with certain banks with respect to contractual obligations related to acquisitions or divestitures or other legal obligations. As of December 31, 2019 and 2018, the amount of such restricted cash was approximately $42 million and $60 million, respectively.

Retainage represents amounts that, pursuant to the applicable contract, are not due until project completion and acceptance by the customer. Unbilled receivables represent revenues that are not currently billable to the customer under the terms of the contract. These items are expected to be billed and collected in the normal course of business. Unbilled receivables where we have an unconditional right to payment are included in Accounts receivable.

Contract liabilities relate to payments received in advance of the satisfaction of performance under the contract. We receive payments from customers based on the terms established in our contracts. See Note 6 for further discussion of contract assets and liabilities.

Valuation reserves for excess, obsolete, and slow-moving inventory are estimated by comparing the inventory levels of individual parts to both future sales forecasts or production requirements and historical usage rates in order to identify inventory where the resale value or replacement value is less than inventoriable cost. Other factors that management considers in determining the adequacy of these reserves include whether individual inventory parts meet current specifications and cannot be substituted for a part currently being sold or used as a service part, overall market conditions, and other inventory management initiatives. Manufacturing costs are allocated to current production and firm contracts.

Equity Method Investments. Investments in which we have the ability to exercise significant influence, but do not control, are accounted for under the equity method of accounting and are included in Other assets on the Consolidated Balance Sheet. Under this method of accounting, our share of the net earnings or losses of the investee is included in Other income, net on the Consolidated Statement of Operations since the activities of the investee are closely aligned with the operations of the business segment holding the investment. We evaluate our equity method investments whenever events or changes in circumstance indicate that the carrying amounts of such investments may be impaired. If a decline in the value of an equity method investment is determined to be other than temporary, a loss is recorded in earnings in the current period. UTC sells products to and purchases products from unconsolidated entities accounted for under the equity method, which are considered related parties. This activity is predominantly within our Carrier segment and is not considered material to the Consolidated Statement of Operations nor Consolidated Balance Sheet of UTC.

Customer Financing Assets. Customer Financing Assets (CFA) primarily relate to the aerospace business in which we provide financing to airline customers. The most common types of financing include products under lease, notes receivable, long-term accounts receivable and lease receivable. We record revenue from lease assets by applying Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 842, Leases, and from interest on the notes, accounts and lease receivables. Interest from notes and financing leases, rental income from operating lease assets and gains or losses on sales of operating lease assets is aggregated under the caption of “Other income, net” in the Consolidated Statement of Operations. The current portion of these financing arrangements are aggregated under the caption of “Other assets, current” and the non-current portions of these financing arrangements are aggregated under the caption of “Customer financing assets” in the Consolidated Balance Sheet. The increases and decreases in CFA from funding, receipts and certain other activity, are reflected as Investing Activities in the Consolidated Statement of Cash Flows. The product under lease assets are valued at cost and reviewed for impairment when circumstances indicate that the related carrying amounts may not be recoverable. Notes, accounts and lease receivable are valued at cost and reviewed for impairment when it is probable that we will be unable to collect amounts due. As of December 31, 2019 the reserves related to customer financing assets are not material.

Business Combinations. We account for transactions that are classified as business combinations in accordance with FASB ASC Topic 805, “Business Combinations.” Once a business is acquired, the fair value of the identifiable assets acquired and liabilities assumed is determined with the excess cost recorded to goodwill. As required, a preliminary fair value is determined once a business is acquired, with the final determination of the fair value being completed within the one year measurement period from the date of acquisition.

Goodwill and Intangible Assets. Goodwill represents costs in excess of fair values assigned to the underlying net assets of acquired businesses. Goodwill and intangible assets deemed to have indefinite lives are not amortized. Goodwill and indefinite-lived intangible assets are subject to annual impairment testing or when a triggering event occurs using the guidance and criteria described in the Intangibles - Goodwill and Other Topic of the FASB ASC. This testing compares carrying values to fair values and, when appropriate, the carrying value of these assets is reduced to fair value.

Intangible assets consist of service portfolios, patents, trademarks/tradenames, customer relationships and other intangible assets including collaboration assets, as discussed further in Note 2. Acquired intangible assets are recognized at fair value in purchase accounting and then amortized to cost of sales and selling, general & administrative expenses over the applicable useful lives. Also included within other intangible assets are commercial aerospace payments made to secure certain contractual rights to provide product on new aircraft platforms. We classify amortization of such payments as a reduction of sales. Such payments are capitalized when there are distinct rights obtained and there are sufficient incremental cash flows to support the recoverability of the assets established. Otherwise, the applicable portion of the payments are expensed. Consideration paid on these contractual commitments is capitalized when it is no longer conditional.

Useful lives of finite-lived intangible assets are estimated based upon the nature of the intangible asset and the industry in which the intangible asset is used. These intangible assets are amortized based on the pattern in which the economic benefits of the intangible assets are consumed. For both our commercial aerospace collaboration assets and exclusivity arrangements, the pattern of economic benefit generally results in lower amortization during the development period with increasing amortization as programs enter full rate production and aftermarket cycles. If a pattern of economic benefit cannot be reliably determined or if straight-line amortization approximates the pattern of economic benefit, a straight-line amortization method may be used. The range of estimated useful lives is as follows:


Collaboration assets			30 years
Customer relationships and related programs			1 to 32 years
Purchased service contracts			5 to 25 years
Patents & trademarks			4 to 40 years
Exclusivity assets			5 to 25 years

Leases. We account for leases in accordance with ASC Topic 842: Leases. Under Topic 842, the right-of-use model requires a lessee to record a right-of-use asset and a lease liability on the Consolidated Balance Sheet for all leases with terms longer than 12 months. Leases are classified as either finance or operating, with classification affecting the pattern of expense recognition in the Consolidated Statement of Operations. In addition, Topic 842 requires a lessor to classify leases as either sales-type, finance or operating. A lease will be treated as a sale if it transfers all of the risks and rewards, as well as control of the underlying asset, to the lessee. If risks and rewards are conveyed without the transfer of control, the lease is treated as financing. If the lessor doesn’t convey risks and rewards or control, the lease is treated as operating.

We enter into lease agreements for the use of real estate space, vehicles, information technology equipment, and certain other equipment under operating and finance leases. We determine if an arrangement contains a lease at inception. Operating leases are included in Operating lease right-of-use assets, Accrued liabilities, and Operating lease liabilities in our

Consolidated Balance Sheet. Finance leases are not considered significant to our Consolidated Balance Sheet or Consolidated Statement of Operations. Finance lease right-of-use assets at December 31, 2019 of $55 million are included in Other assets in our Consolidated Balance Sheet. Finance lease liabilities at December 31, 2019 of $84 million are included in Long-term debt currently due, and Long-term debt in our Consolidated Balance Sheet.

Right-of-use assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Lease right-of-use assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments, and use the implicit rate when readily determinable. We determine our incremental borrowing rate through market sources including relevant industry rates. Our lease right-of-use assets also include any lease pre-payments and exclude lease incentives. Certain of our leases include variable payments, which may vary based upon changes in facts or circumstances after the start of the lease. We exclude variable payments from lease right-of-use assets and lease liabilities, to the extent not considered fixed, and instead, expense variable payments as incurred. Variable lease expense and lease expense for short duration contracts is not a material component of lease expense. Our leases generally have remaining lease terms of 1 to 20 years, some of which include options to extend leases. For the majority of our leases with options to extend, those options are up to 5 years with the ability to terminate the lease within 1 year. The exercise of lease renewal options is at our sole discretion and our lease right-of-use assets and liabilities reflect only the options we are reasonably certain that we will exercise. Lease expense is recognized on a straight-line basis over the lease term.

In limited instances we act as a lessor, primarily for commercial aerospace engines and certain heating, ventilation and air conditioning (HVAC) systems and commercial equipment, all of which are classified as operating leases. These leases are not significant to our Consolidated Balance Sheet or Consolidated Statement of Operations.

Other Long-Lived Assets. We evaluate the potential impairment of other long-lived assets whenever events or changes in circumstances indicate that the related carrying amounts may not be recoverable. If the carrying value of other long-lived assets held and used exceeds the sum of the undiscounted expected future cash flows, the carrying value is written down to fair value.

Long-Term Financing Receivables. Our long-term financing receivables primarily represent balances related to the aerospace businesses such as long-term trade accounts receivable, leases, and notes receivable. We also have other long-term receivables in our commercial businesses; however, both the individual and aggregate amounts of those other receivables are not significant.

Long-term trade accounts receivable are principally amounts arising from the sale of goods and services with a contractual maturity date or realization period of greater than one year and are recognized as "Other assets" in our Consolidated Balance Sheet. Notes and leases receivable are recognized as "Customer financing assets" in our Consolidated Balance Sheet. These exclude receivables related to operating leases. The following table summarizes the balance by class of aerospace business-related long-term receivables as of December 31, 2019 and 2018:


(dollars in millions)	2019		2018
Long-term trade accounts receivable	$	251	$	269
Notes and leases receivable	265		258
Total long-term receivables	$	516	$	527

We determine a receivable is impaired when, based on current information and events, it is probable that we will be unable to collect amounts due according to the contractual terms of the receivable agreement. Factors considered in assessing collectability and risk include, but are not limited to, examination of credit quality indicators and other evaluation measures, underlying value of any collateral or security interests, significant past due balances, historical losses, and existing economic conditions.

We determine credit ratings for each customer in our portfolio based upon public information and information obtained directly from our customers. We conduct a review of customer credit ratings, published historical credit default rates for different rating categories, and multiple third-party aircraft value publications as a basis to validate the reasonableness of the allowance for losses on these balances quarterly or when events and circumstances warrant. Customer credit ratings range from customers with an extremely strong capacity to meet financial obligations, to customers whose uncollateralized receivable is in default. There can be no assurance that actual results will not differ from estimates or that consideration of these factors in the future will not result in an increase or decrease to the allowance for credit losses on long-term receivables. Based upon the customer credit ratings, approximately $150 million of our long-term receivables were considered to bear high credit risk as of December 31, 2019 and 2018. See Note 4 for further discussion of commercial aerospace industry assets and commitments.

Reserves for credit losses on receivables relate to specifically identified receivables that are evaluated individually for impairment. For notes and leases receivable, we determine a specific reserve for exposure based on the difference between the

carrying value of the receivable and the estimated fair value of the related collateral in connection with the evaluation of credit risk and collectability. For long-term trade accounts receivable, we evaluate credit risk and collectability individually to determine if an allowance is necessary. Our long-term receivables reflected in the table above, which include reserves of $17 million and $16 million as of December 31, 2019 and 2018, respectively, are individually evaluated for impairment. At both December 31, 2019 and 2018, we did not have any significant balances that are considered to be delinquent, on non-accrual status, past due 90 days or more, or considered to be impaired.

Income Taxes. In the ordinary course of business there is inherent uncertainty in quantifying our income tax positions. We assess our income tax positions and record tax benefits for all years subject to examination based upon management's evaluation of the facts, circumstances, and information available at the reporting date. For those tax positions where it is more-likely-than-not that a tax benefit will be sustained, we have recorded the largest amount of tax benefit with a greater than 50% likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. For those income tax positions where it is not more-likely-than-not that a tax benefit will be sustained, no tax benefit has been recognized in the financial statements. Where applicable, associated interest expense has also been recognized. We recognize accrued interest related to unrecognized tax benefits in interest expense. Penalties, if incurred, would be recognized as a component of income tax expense.

On December 22, 2017 the TCJA was enacted. The TCJA contains a new law that subjects the Company to a tax on Global Intangible Low-Taxed Income (GILTI), beginning in 2018. GILTI is a tax on foreign income in excess of a deemed return on tangible assets of foreign corporations. The FASB has provided that companies subject to GILTI have the option to account for the GILTI tax as a period cost if and when incurred, or to recognize deferred taxes for temporary differences, including outside basis differences, expected to reverse as GILTI. We have elected to account for GILTI as a period cost, as incurred.

Revenue Recognition. We account for revenue in accordance with ASC Topic 606: Revenue from Contracts with Customers. We adopted ASC 606 effective January 1, 2018 and elected the modified retrospective approach. The results for periods before 2018 were not adjusted for the new standard and the cumulative effect of the change in accounting was recognized through retained earnings at the date of adoption. Under Topic 606, a performance obligation is a promise in a contract with a customer to transfer a distinct good or service to the customer. Some of our contracts with customers contain a single performance obligation, while others contain multiple performance obligations most commonly when a contract spans multiple phases of the product life-cycle such as development, production, maintenance and support. A contract's transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. When there are multiple performance obligations within a contract, we allocate the transaction price to each performance obligation based on its standalone selling price.

We consider the contractual consideration payable by the customer and assess variable consideration that may affect the total transaction price, including contractual discounts, contract incentive payments, estimates of award fees, unfunded contract value under U.S. Government contracts, and other sources of variable consideration, when determining the transaction price of each contract. We include variable consideration in the estimated transaction price when there is a basis to reasonably estimate the amount. These estimates are based on historical experience, anticipated performance and our best judgment at the time. We also consider whether our contracts provide customers with significant financing. Generally, our contracts do not contain significant financing.

Timing of the satisfaction of performance obligations varies across our businesses due to our diverse product and service mix, customer base, and contractual terms.

Point in time revenue recognition. Performance obligations are satisfied as of a point in time for heating, ventilating, air-conditioning and refrigeration systems, certain alarm and fire detection and suppression systems, and certain aerospace components, engines, and spare parts. Revenue is recognized when control of the product transfers to the customer, generally upon product shipment.

Over-time revenue recognition. Performance obligations are satisfied over-time if the customer receives the benefits as we perform work, if the customer controls the asset as it is being produced, or if the product being produced for the customer has no alternative use and we have a contractual right to payment. Revenue is recognized for our construction-type and certain production-type contracts on an over-time basis. We recognize revenue on an over-time basis on certain long-term aerospace aftermarket contracts and aftermarket service work; development, fixed price, and other cost reimbursement contracts in our aerospace businesses; and elevator and escalator sales, installation, service, modernization and other construction contracts in our commercial businesses. For construction and installation contracts within our commercial businesses and aerospace performance obligations satisfied over time, revenue is recognized using costs incurred to date relative to total estimated costs at completion to measure progress. Incurred costs represent work performed, which correspond with and best depict transfer of

control to the customer. Contract costs include labor, materials, and subcontractors' costs, or other direct costs, and where applicable on government and commercial contracts, indirect costs.

For certain of our long-term aftermarket contracts, revenue is recognized over the contract period. In the commercial businesses, revenue is primarily recognized on a straight-line basis over the contract period. In the aerospace businesses, we generally account for such contracts as a series of daily obligations to stand ready to provide spare parts and product maintenance and aftermarket services. These arrangements include the sale of spare parts with integral services to our customers, and are generally classified as Service sales, with the corresponding costs classified in Cost of services sold, within the Consolidated Statement of Operations. Revenue is primarily recognized in proportion to cost as sufficient historical evidence indicates that the cost of performing services under the contract is incurred on an other than straight-line basis. Aerospace contract modifications are routine and contracts are often modified to account for changes in contract specifications or requirements. Contract modifications that are for goods or services that are not distinct are accounted for as part of the existing contract.

We incur costs for engineering and development of aerospace products directly related to existing or anticipated contracts with customers. Such costs generate or enhance our ability to satisfy our performance obligations under these contracts. We capitalize these costs as contract fulfillment costs to the extent the costs are recoverable from the associated contract margin and subsequently amortize the costs as the original equipment (OEM) products performance obligations are satisfied. In instances where intellectual property does not transfer to the customer, we defer the customer funding of OEM product engineering and development and recognize revenue when the OEM products performance obligations are satisfied. Capitalized contract fulfillment costs were $1,519 million and $914 million as of December 31, 2019 and 2018, respectively and are recognized in "Other assets" in our Consolidated Balance Sheet and are included in Other operating activities, net in our Consolidated Statement of Cash Flows. The increase in capitalized net contract fulfillment costs is driven by current year activity at Collins Aerospace Systems. Costs to obtain contracts are not material.

Loss provisions on OEM contracts are recognized to the extent that estimated contract costs exceed the estimated consideration from the products contemplated under the contractual arrangement. For new commitments, we generally record loss provisions at the earlier of contract announcement or contract signing except for certain contracts under which losses are recorded upon receipt of the purchase order that obligates us to perform. For existing commitments, anticipated losses on contractual arrangements are recognized in the period in which losses become evident. Products contemplated under contractual arrangements include firm quantities of product sold under contract and, in the commercial engine and wheels and brakes businesses, future highly probable sales of replacement parts required by regulation that are expected to be sold subsequently for incorporation into the original equipment. In the commercial engine and wheels and brakes businesses, when the combined original equipment and aftermarket arrangement for each individual sales campaign are profitable, we record original equipment product losses, as applicable, at the time of delivery.

We review our cost estimates on significant contracts on a quarterly basis and for others, no less frequently than annually or when circumstances change and warrant a modification to a previous estimate. We record changes in contract estimates using the cumulative catch-up method. Operating profits included net unfavorable changes in aerospace contract estimates of approximately $69 million, $50 million, and $110 million in 2019, 2018 and 2017, respectively, primarily the result of unexpected increases in estimated costs related to Pratt & Whitney long-term aftermarket contracts.

Collaborations: Sales generated from engine programs, spare parts sales, and aftermarket business under collaboration arrangements are recorded consistent with our revenue recognition policies in our Consolidated Financial Statements. Amounts attributable to our collaborators for their share of sales are recorded as cost of sales in our Consolidated Financial Statements based upon the terms and nature of the arrangement. Costs associated with engine programs under collaborative arrangements are expensed as incurred. Under these arrangements, collaborators contribute their program share of engine parts, incur their own production costs and make certain payments to Pratt & Whitney for shared or joint program costs. The reimbursement from collaborators of their share of program costs is recorded as a reduction of the related expense item at that time.

Cash Payments to Customers: Carrier customarily offers its customers incentives to purchase products to ensure an adequate supply of its products in the distribution channels. The principal incentive program provides reimbursements to distributors for offering promotional pricing for our products. We account for incentive payments made as a reduction in sales. In our aerospace businesses, we offer customers certain incentives to purchase our products. These incentives may result in payments made to customers. In addition, we may make participation payments to certain aerospace customers to secure certain contractual rights. To the extent these rights are incremental and are supported by the incremental cash flows obtained, they are capitalized as intangible assets. Otherwise, such payments are recorded as a reduction in sales. We classify the subsequent amortization of the capitalized acquired intangible assets from our customers as a reduction in sales. Contractually stated prices in arrangements with our customers that include the acquisition of intangible rights within the scope of the Intangibles - Goodwill and Other Topic of the FASB ASC and deliverables within the scope of the Revenue Recognition Topic

of the FASB ASC are not presumed to be representative of fair value for determining the amounts to allocate to each element of an arrangement.

Remaining Performance Obligations (RPO). RPO represents the aggregate amount of total contract transaction price that is unsatisfied or partially unsatisfied. As of December 31, 2019 our total RPO was approximately $132.7 billion compared to $115.5 billion as of December 31, 2018. Of the total RPO as of December 31, 2019, we expect approximately 45% will be recognized as sales over the following 24 months.

Research and Development. Research and development costs not specifically covered by contracts and those related to the company sponsored share of research and development activity in connection with cost-sharing arrangements are charged to expense as incurred. Government research and development support, not associated with specific contracts, is recorded as a reduction to research and development expense in the period earned.

Research and development costs incurred under contracts with customers are included as a contract cost and reported as a component of cost of products sold when revenue from such contracts is recognized. Research and development costs in excess of contractual consideration are expensed as incurred.

Foreign Exchange. We conduct business in many different currencies and, accordingly, are subject to the inherent risks associated with foreign exchange rate movements. The financial position and results of operations of substantially all of our foreign subsidiaries are measured using the local currency as the functional currency. Foreign currency denominated assets and liabilities are translated into U.S. Dollars at the exchange rates existing at the respective balance sheet dates, and income and expense items are translated at the average exchange rates during the respective periods. The aggregate effects of translating the balance sheets of these subsidiaries are deferred as a separate component of shareowners' equity.

Derivatives and Hedging Activity. We have used derivative instruments, including swaps, forward contracts and options, to help manage certain foreign currency, interest rate and commodity price exposures. Derivative instruments are viewed as risk management tools by us and are not used for trading or speculative purposes. By their nature, all financial instruments involve market and credit risks. We enter into derivative and other financial instruments with major investment grade financial institutions and have policies to monitor the credit risk of those counterparties. We limit counterparty exposure and concentration of risk by diversifying counterparties. While there can be no assurance, we do not anticipate any material non-performance by any of these counterparties. We enter into transactions that are subject to enforceable master netting arrangements or similar agreements with various counterparties. However, we have not elected to offset multiple contracts with a single counterparty and, as a result, the fair value of the derivative instruments in a loss position is not offset against the fair value of derivative instruments in a gain position.

Derivatives used for hedging purposes may be designated and effective as a hedge of the identified risk exposure at the inception of the contract. All derivative instruments are recorded on the balance sheet at fair value. Derivatives used to hedge foreign currency denominated balance sheet items are reported directly in earnings along with offsetting transaction gains and losses on the items being hedged. Derivatives used to hedge forecasted cash flows associated with foreign currency commitments or forecasted commodity purchases may be accounted for as cash flow hedges, as deemed appropriate. Gains and losses on derivatives designated as cash flow hedges are recorded in other comprehensive income and reclassified to earnings as a component of product sales or expenses, as applicable, when the hedged transaction occurs. Gains and losses on derivatives designated as cash flow hedges are recorded in Other operating activities, net within the Consolidated Statement of Cash Flows. To the extent that a previously designated hedging transaction is no longer an effective hedge, any ineffectiveness measured in the hedging relationship is recorded currently in earnings in the period it occurs. As discussed in Note 14, at December 31, 2019 we have approximately €4.20 billion of euro-denominated long-term debt, which qualifies as a net investment hedge against our investments in European businesses.

To the extent the hedge accounting criteria are not met, the foreign currency forward contracts are utilized as economic hedges and changes in the fair value of these contracts are recorded currently in earnings in the period in which they occur. Additional information pertaining to foreign currency forward contracts and net investment hedging is included in Note 14.

Environmental. Environmental investigatory, remediation, operating and maintenance costs are accrued when it is probable that a liability has been incurred and the amount can be reasonably estimated. The most likely cost to be incurred is accrued based on an evaluation of currently available facts with respect to each individual site, including existing technology, current laws and regulations and prior remediation experience. Where no amount within a range of estimates is more likely, the minimum is accrued. For sites with multiple responsible parties, we consider our likely proportionate share of the anticipated remediation costs and the ability of the other parties to fulfill their obligations in establishing a provision for those costs. Liabilities with fixed or reliably determinable future cash payments are discounted. Accrued environmental liabilities are not reduced by potential insurance reimbursements. See Note 18 for additional details on the environmental remediation activities.

Pension and Postretirement Obligations. Guidance under the Compensation - Retirement Benefits Topic of the FASB ASC requires balance sheet recognition of the overfunded or underfunded status of pension and postretirement benefit plans. Under this guidance, actuarial gains and losses, prior service costs or credits, and any remaining transition assets or obligations that have not been recognized under previous accounting standards must be recognized in other comprehensive income, net of tax effects, until they are amortized as a component of net periodic benefit cost.

Product Performance Obligations. We extend performance and operating cost guarantees beyond our normal service and warranty policies for extended periods on some of our products, particularly commercial aircraft engines. Liability under such guarantees is based upon future product performance and durability. We accrue for such costs that are probable and can be reasonably estimated. In addition, we incur discretionary costs to service our products in connection with product performance issues. The costs associated with these product performance and operating cost guarantees require estimates over the full terms of the agreements, and require management to consider factors such as the extent of future maintenance requirements and the future cost of material and labor to perform the services. These cost estimates are largely based upon historical experience. See Note 17 for further discussion.

Collaborative Arrangements. In view of the risks and costs associated with developing new engines, Pratt & Whitney has entered into certain collaboration arrangements in which sales, costs and risks are shared. Sales generated from engine programs, spare parts, and aftermarket business under collaboration arrangements are recognized in our financial statements when earned. Amounts attributable to our collaborators for their share of sales are recorded as an expense in our financial statements based upon the terms and nature of the arrangement. Costs associated with engine programs under collaborative arrangements are expensed as incurred. Under these arrangements, collaborators contribute their program share of engine parts, incur their own production costs and make certain payments to Pratt & Whitney for shared or joint program costs. The reimbursement from the collaborators of their share of program costs is recorded as a reduction of the related expense item at that time. As of December 31, 2019, the collaborators' interests in all commercial engine programs ranged from 13% to 49%, inclusive of a portion of Pratt & Whitney's interests held by other participants. Pratt & Whitney is the principal participant in all existing collaborative arrangements, with the exception of the Engine Alliance (EA), a joint venture with GE Aviation, which markets and manufactures the GP7000 engine for the Airbus A380 aircraft. There are no individually significant collaborative arrangements and none of the collaborators individually exceed a 31% share in an individual program. The following table illustrates the Consolidated Statement of Operations classification and amounts attributable to transactions arising from the collaborative arrangements between participants for each period presented.


(dollars in millions)	2019		2018		2017
Collaborator share of sales:
Cost of products sold	$	2,097	$	1,688	$	1,789
Cost of services sold	1,674		1,765		929
Collaborator share of program costs (reimbursement of expenses incurred):
Cost of products sold	(190)		(209)		(143)
Research and development	(219)		(225)		(190)
Selling, general and administrative	(101)		(87)		(74)

Accounting Pronouncements.

In June 2016, the FASB issued Accounting Standards Update (ASU) 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This ASU and its related amendments modifies the impairment model to utilize an expected loss methodology in place of the incurred loss methodology for financial instruments, including trade receivables, contract assets, long-term receivables and off-balance sheet credit exposures. The amendment requires entities to consider a broader range of information to estimate expected credit losses, including historical information, current conditions and a reasonable forecast period, which may result in earlier recognition of certain losses. The provisions of this ASU are effective for years beginning after December 15, 2019, with early adoption permitted. A modified retrospective approach is required with a cumulative-effect adjustment to retained earnings as of January 1, 2020. We are still quantifying the impact of this ASU and its related amendments on our Consolidated Financial Statements which is not expected to be material.

In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement. The new standard removes the disclosure requirements for the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy. This standard did not have a material impact on our financial statement disclosures. We early adopted this standard effective January 1, 2019.

In August 2018, the FASB issued ASU 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans. The new standard includes updates to the disclosure requirements for defined benefit plans including several additions, deletions and modifications to the disclosure requirements. The provisions of this ASU are effective for fiscal years ending after December 15, 2020, with early adoption permitted. We are currently evaluating the impact of this ASU.

In August 2018, the FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. The new standard provides updated guidance surrounding implementation costs associated with cloud computing arrangements that are service contracts. The provisions of this ASU are effective for years beginning after December 15, 2019, with early adoption permitted. We adopted the new standard prospectively effective January 1, 2020. We do not expect this ASU to have a material impact on the Consolidated Financial Statements.

In October 2018, the FASB issued ASU 2018-17, Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities. The amendments in this update for determining whether a decision-making fee is a variable interest require reporting entities to consider indirect interests held through related parties under common control on a proportional basis rather than as the equivalent of a direct interest in its entirety (as currently required in generally accepted accounting principles (GAAP)). These amendments also will create alignment between determining whether a decision making fee is a variable interest and determining whether a reporting entity within a related party group is the primary beneficiary of a VIE. This will significantly reduce the risk that decision makers with insignificant direct and indirect interests could be deemed the primary beneficiary of a VIE. The provisions of this ASU are effective for years beginning after December 15, 2019, with early adoption permitted. We adopted the new standard effective January 1, 2020. This ASU did not have an impact on the Consolidated Financial Statements.

In November 2018, the FASB issued ASU 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606. The amendments in this update make targeted improvements to GAAP for collaborative arrangements as follows: clarify that certain transactions between collaborative arrangement participants should be accounted for as revenue under Topic 606 when the collaborative arrangement participant is a customer in the context of a unit of account. In those situations, all the guidance in Topic 606 should be applied, including recognition, measurement, presentation, and disclosure requirements; add unit-of-account guidance in Topic 808 to align with the guidance in Topic 606 (that is, a distinct good or service) when an entity is assessing whether the collaborative arrangement or a part of the arrangement is within the scope of Topic 606; and require that in a transaction with a collaborative arrangement participant that is not directly related to sales to third parties, presenting the transaction together with revenue recognized under Topic 606 is precluded if the collaborative arrangement participant is not a customer. The provisions of this ASU are effective for years beginning after December 15, 2019, with early adoption permitted. We adopted the new standard effective January 1, 2020. This ASU did not have an impact on the Consolidated Financial Statements.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The amendments in this update remove certain exceptions of Topic 740 including: exception to the incremental approach for intraperiod tax allocation when there is a loss from continuing operations and income or gain from other items; exception to the requirement to recognize a deferred tax liability for equity method investments when a foreign subsidiary becomes an equity method investment; exception to the ability not to recognize a deferred tax liability for a foreign subsidiary when a foreign equity method investment becomes a subsidiary; exception to the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. There are also additional areas of guidance in regards to: franchise and other taxes partially based on income and the interim recognition of enactment of tax laws and rate changes. The provisions of this ASU are effective for years beginning after December 15, 2020, with early adoption permitted. We are currently evaluating the impact of this ASU on our consolidated financial statements.

Earnings Per Share

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Earnings Per Share Text Block

EARNINGS PER SHARE


(dollars in millions, except per share amounts; shares in millions)	2019		2018		2017



Net income attributable to common shareowners	$	5,537	$	5,269	$	4,552
Basic weighted average number of shares outstanding	854.8		800.4		790.0
Stock awards and equity units (share equivalent)	9.1		9.7		9.1
Diluted weighted average number of shares outstanding	863.9		810.1		799.1
Earnings Per Share of Common Stock:
Basic	$	6.48	$	6.58	$	5.76



Diluted	$	6.41	$	6.50	$	5.70

The computation of diluted earnings per share excludes the effect of the potential exercise of stock awards, including stock appreciation rights and stock options, when the average market price of the common stock is lower than the exercise price of the related stock awards during the period because the effect would be anti-dilutive. In addition, the computation of diluted earnings per share excludes the effect of the potential exercise of stock awards when the awards' assumed proceeds exceed the average market price of the common shares during the period. For 2019, 2018 and 2017, there were 8.3 million, 5.1 million and 5.9 million anti-dilutive stock awards excluded from the computation, respectively.

Commercial Aerospace Industry Assets and Commitments

12 Months Ended

Dec. 31, 2019

Other Commitments [Abstract]

Commercial Aerospace Industry Assets and Commitments

NOTE 4: COMMERCIAL AEROSPACE INDUSTRY ASSETS AND COMMITMENTS

We have receivables and other financing assets with commercial aerospace industry customers totaling $11,394 million and $11,695 million at December 31, 2019 and 2018, respectively. These include customer financing assets related to commercial aerospace industry customers, consisting of products under lease of $3,185 million and $2,736 million, and notes and leases receivable of $308 million and $299 million, at December 31, 2019 and 2018, respectively.

Aircraft financing commitments, in the form of debt or lease financing, are provided to commercial aerospace customers. The extent to which the financing commitments will be utilized is not currently known, since customers may be able to obtain more favorable terms from other financing sources. We may also arrange for third-party investors to assume a portion of these commitments. If financing commitments are exercised, debt financing is generally secured by assets with fair market values equal to or exceeding the financed amounts consistent with market terms and conditions. We may also lease aircraft and subsequently sublease the aircraft to customers under long-term non-cancelable operating leases. Our financing commitments with customers are contingent upon maintenance of certain levels of financial condition by the customers.

We have also made residual value and other guarantees related to various commercial aerospace customer financing arrangements. The estimated fair market values of the guaranteed assets equal or exceed the value of the related guarantees, net of existing reserves. We have residual value and other guarantees of $333 million as of December 31, 2019. Partner share of these guarantees is $142 million. Refer to Note 17 to the Consolidated Financial Statements for additional discussion on guarantees.

We also have other contractual commitments, including commitments to secure certain contractual rights to provide product on new aircraft platforms, which are included in "Other commercial aerospace commitments" in the table below. Payments made on these contractual commitments are included within other intangible assets and are to be amortized over the term of underlying economic benefit. Our commercial aerospace financing and other contractual commitments as of December

31, 2019 were approximately $15.0 billion. We have entered into certain collaboration arrangements, which may include participation by our collaboration partners in these commitments.

The following is the expected maturity of commercial aerospace industry assets and commitments as of December 31, 2019:


(dollars in millions)	Committed		2020		2021		2022		2023		2024		Thereafter
Notes and leases receivable	$	308	$	30	$	23	$	14	$	22	$	38	$	181
Commercial aerospace financing commitments	$	3,937	$	911	$	1,119	$	974	$	819	$	44	$	70
Other commercial aerospace commitments	11,055		702		736		717		668		627		7,605
Collaboration partners' share	(5,284)		(508)		(623)		(571)		(538)		(193)		(2,851)

Total commercial commitments	$	9,708	$	1,105	$	1,232	$	1,120	$	949	$	478	$	4,824

In connection with our 2012 agreement to acquire Rolls-Royce's ownership and collaboration interests in IAE AG, additional payments are due to Rolls-Royce contingent upon each hour flown through June 2027 by the V2500-powered aircraft in service as of the acquisition date. These flight hour payments, included in "Other commercial aerospace commitments" in the table above, are being capitalized as collaboration intangible assets.

We have long-term aftermarket maintenance contracts with commercial aerospace industry customers for which revenue is recognized over-time in proportion to actual costs incurred relative to total expected costs to be incurred over the respective contract periods. Billings, however, are typically based on factors such as aircraft or engine flight hours. The timing differences between the billings and the maintenance costs incurred generates both Contract assets and Contract liabilities. Additionally, we have other contracts with commercial aerospace industry customers which can result in the generation of Contract assets and Contract liabilities. Contract assets totaled $2,741 million and $2,247 million at December 31, 2019 and 2018, respectively, and are included in "Contract assets, current" and "Other assets" in the accompanying Consolidated Balance Sheet.

Allowance for doubtful accounts was $248 million and $245 million at December 31, 2019 and 2018, respectively. Reserves related to financing commitments and guarantees were $7 million and $15 million at December 31, 2019 and 2018, respectively.

In addition, in connection with the acquisition of Rockwell Collins in 2018 and Goodrich in 2012, we recorded assumed liabilities of approximately $1.02 billion and $2.2 billion, respectively related to customer contractual obligations on certain programs with terms less favorable than could be realized in market transactions as of the acquisition date. These liabilities are being liquidated in accordance with the underlying pattern of obligations, as reflected by the net cash outflows incurred on the contracts. Total consumption of the contractual obligations for the years ended December 31, 2019 and 2018 was approximately $345 million and $252 million, respectively. The balance of the contractual obligations at December 31, 2019 was $1,408 million, with future consumption expected to be as follows: $263 million in 2020, $189 million in 2021, $148 million in 2022, $118 million in 2023, $127 million in 2024 and $563 million thereafter.

We also have intangible assets associated with commercial aerospace. Refer to Note 2 for discussion of intangible assets. Refer to Note 1 for discussion of contract fulfillment costs. Refer to Note 19 for discussion of leases, including those that were disclosed as commitments prior to the adoption of ASC842.

Inventory, Net

12 Months Ended

Dec. 31, 2019

Inventory Disclosure [Abstract]

Inventory, Net [Text Block]

INVENTORY, NET


(dollars in millions)	2019		2018
Raw materials	$	3,357	$	3,052
Work-in-process	2,726		2,673
Finished goods	4,867		4,358
	$	10,950	$	10,083

Raw materials, work-in-process and finished goods are net of valuation reserves of $1,377 million and $1,270 million as of December 31, 2019 and 2018, respectively.

Contract Assets and Liabilities

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Contract with Customer, Asset and Liability [Table Text Block]

Contract assets reflect revenue recognized and performance obligations satisfied in advance of customer billing. Contract liabilities relate to payments received in advance of the satisfaction of performance under the contract. We receive payments

from customers based on the terms established in our contracts. Total contract assets and contract liabilities as of December 31, 2019 and 2018 are as follows:


(dollars in millions)	December 31, 2019		December 31, 2018
Contract assets, current	$	4,184	$	3,486
Contract assets, noncurrent (included within Other assets)	1,338		1,142
Total contract assets	5,522		4,628
Contract liabilities, current	(6,180)		(5,720)
Contract liabilities, noncurrent	(5,732)		(5,069)
Total contract liabilities	(11,912)		(10,789)
Net contract liabilities	$	(6,390)	$	(6,161)

Contract assets increased $894 million during the year ended December 31, 2019 due to revenue recognition in excess of customer billings, primarily on Pratt & Whitney military and commercial aftermarket service agreements and various programs at Collins Aerospace Systems. Contract liabilities increased $1,123 million during the year ended December 31, 2019 primarily due to customer billings in excess of revenue recognized on Pratt & Whitney commercial aftermarket service agreements and various programs at Collins Aerospace Systems. We recognized revenue of $4.9 billion during the year ended December 31, 2019 related to contract liabilities as of December 31, 2018.

Fixed Assets

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Fixed Assets

FIXED ASSETS


(dollars in millions)	Estimated Useful Lives	2019		2018
Land		$	447	$	425
Buildings and improvements	12-40 years	6,673		6,486
Machinery, tools and equipment	3-20 years	16,353		15,119
Other, including assets under construction		2,213		2,054
		25,686		24,084
Accumulated depreciation		(12,931)		(11,787)
		$	12,755	$	12,297

Depreciation expense is recorded predominantly utilizing the straight-line method and was $1,506 million in 2019, $1,240 million in 2018 and $1,178 million in 2017.

Accrued Liabilities

12 Months Ended

Dec. 31, 2019

Accrued Liabilities [Abstract]

Accrued Liabilities

ACCRUED LIABILITIES


(dollars in millions)	2019		2018
Accrued salaries, wages and employee benefits	$	2,407	$	2,074
Service and warranty accruals	734		754
Interest payable	608		637
Litigation and contract matters	502		461
Income taxes payable	928		460
Accrued property, sales and use taxes	320		277
Canadian government settlement - current portion	—		34
Accrued restructuring costs	208		249
Accrued workers compensation	157		142
Liabilities held for sale	—		40
Operating lease liabilities, current	544		—
Other	5,329		5,095
	$	11,737	$	10,223

Borrowings and Lines of Credit

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Borrowings and Lines of Credit


(dollars in millions)	2019		2018
Short-term borrowings:
Commercial paper	$	—	$	1,257
Other borrowings	2,364		212
Total short-term borrowings	$	2,364	$	1,469

At December 31, 2019, we had credit agreements with various banks permitting aggregate borrowings of up to $10.35 billion including a $2.20 billion revolving credit agreement and a $2.15 billion multicurrency revolving credit agreement, both of which expire in August 2021; and a $2.0 billion revolving credit agreement and a $4.0 billion term credit agreement, both of which we entered into on March 15, 2019 and which will expire on March 15, 2021 or, if earlier, the date that is 180 days after the date on which each of the separations of Otis and Carrier have been consummated. As of December 31, 2019, there were borrowings of $2.10 billion under the $4.0 billion term credit agreement. The undrawn portions of the revolving credit agreements are also available to serve as backup facilities for the issuance of commercial paper.

As of December 31, 2019, our maximum commercial paper borrowing limit was $6.35 billion. We had no commercial paper borrowings as of December 31, 2019. We use our commercial paper borrowings for general corporate purposes, including the funding of potential acquisitions, pension contributions, debt refinancing, dividend payments and repurchases of our common stock. The need for commercial paper borrowings arises when the use of domestic cash for general corporate purposes exceeds the sum of domestic cash generation and foreign cash repatriated to the U.S.

At December 31, 2019, approximately $2.3 billion was available under short-term lines of credit with local banks at our various domestic and international subsidiaries. The weighted-average interest expense rates applicable to short-term borrowings and total debt were as follows:


	2019		2018
Average interest expense rate - average outstanding borrowings during the year:
Short-term borrowings	1.9	%	1.5	%
Total debt	3.7	%	3.5	%

Average interest expense rate - outstanding borrowings as of December 31:
Short-term borrowings	3.1	%	1.2	%
Total debt	3.7	%	3.5	%

Long-term debt consisted of the following as of December 31:

Employee Benefit Plans

12 Months Ended

Dec. 31, 2019

Employee Benefit and Share-based Payment Arrangement, Noncash Expense [Abstract]

Employee Benefit Plans

EMPLOYEE BENEFIT PLANS

We sponsor numerous domestic and foreign employee benefit plans, which are discussed below.

In March 2017, the FASB issued ASU 2017-07, Compensation-Retirement Benefits (Topic 715), Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. This ASU requires an employer to report the service cost component of net periodic pension benefit cost in the same line item(s) as other compensation costs arising from services rendered by the pertinent employees during the period, with other cost components presented separately from the service cost component and outside of income from operations. This ASU also allows only the service cost component of net periodic pension benefit cost to be eligible for capitalization when applicable. This ASU was effective for years beginning after December 15, 2017. The Company adopted this standard on January 1, 2018 applying the presentation requirements retrospectively. We elected to apply the practical expedient, which allows us to reclassify amounts disclosed previously in the employee benefit plans note as the basis for applying retrospective presentation for comparative periods as it is impracticable to determine the disaggregation of the cost components for amounts capitalized and amortized in those periods. Provisions related to presentation of the service cost component eligibility for capitalization were applied prospectively.

The effect of the retrospective presentation change related to the net periodic benefit cost of our defined benefit pension and postretirement plans on our Consolidated Statement of Operations was as follows:


	2017
(dollars in millions)	Previously Reported		Effect of Change Higher/(Lower)		As Revised
Cost of product sold	$	31,027	$	197	$	31,224
Cost of services sold	12,926		51		12,977
Research and development	2,387		40		2,427
Selling, general and administrative	6,183		246		6,429

Non-service pension (benefit)	—		(534)		(534)

Employee Savings Plans. We sponsor various employee savings plans. Our contributions to employer sponsored defined contribution plans were $549 million, $403 million and $351 million for 2019, 2018 and 2017, respectively.

Our non-union domestic employee savings plan uses an Employee Stock Ownership Plan (ESOP) for employer matching contributions. External borrowings were used by the ESOP to fund a portion of its purchase of ESOP stock from us. The external borrowings have been extinguished and only re-amortized loans remain between UTC and the ESOP Trust. As ESOP debt service payments are made, common stock is released from an unreleased shares account. ESOP debt may be prepaid or re-amortized to either increase or decrease the number of shares released so that the value of released shares equals the value of plan benefit. We may also, at our option, contribute additional common stock or cash to the ESOP.

Shares of common stock are allocated to employees' ESOP accounts at fair value on the date earned. Cash dividends on common stock held by the ESOP are used for debt service payments. Participants may choose to have their ESOP dividends reinvested or distributed in cash. Common stock allocated to ESOP participants is included in the average number of common shares outstanding for both basic and diluted earnings per share. At December 31, 2019, 23.4 million common shares had been allocated to employees, leaving 7.9 million unallocated common shares in the ESOP Trust, with an approximate fair value of $1.2 billion.

Pension Plans. We sponsor both funded and unfunded domestic and foreign defined benefit pension plans that cover a large number of our employees. Our largest plans are generally closed to new participants. Our plans use a December 31 measurement date consistent with our fiscal year.


(dollars in millions)	2019		2018
Change in Benefit Obligation:
Beginning balance	$	37,795	$	36,999
Service cost	359		372
Interest cost	1,340		1,117
Actuarial loss (gain)	4,651		(2,048)
Total benefits paid	(2,174)		(1,932)
Net settlement, curtailment and special termination benefits	(267)		(38)
Plan amendments	6		65
Business combinations	(6)		3,694
Other	127		(434)
Ending balance	$	41,831	$	37,795

Change in Plan Assets:
Beginning balance	$	35,253	$	35,689
Actual return on plan assets	6,311		(1,667)
Employer contributions	207		238
Benefits paid	(2,174)		(1,932)
Settlements	(54)		(38)
Business combinations	(10)		3,355
Other	156		(392)
Ending balance	$	39,689	$	35,253

Funded Status:
Fair value of plan assets	$	39,689	$	35,253
Benefit obligations	(41,831)		(37,795)
Funded status of plan	$	(2,142)	$	(2,542)

Amounts Recognized in the Consolidated Balance Sheet Consist of:
Noncurrent assets	$	617	$	686
Current liability	(88)		(88)
Noncurrent liability	(2,671)		(3,140)
Net amount recognized	$	(2,142)	$	(2,542)

Amounts Recognized in Accumulated Other Comprehensive Loss Consist of:
Net actuarial loss	$	8,910	$	8,606
Prior service cost	203		139
Net amount recognized	$	9,113	$	8,745

In September 2019, we amended our domestic pension plans to cease accrual of additional benefits for future service and compensation for non-union participants effective December 31, 2019. Beginning January 1, 2020, these participants will earn additional contributions under our domestic savings plan. We utilized the practical expedient and remeasured plan assets and pension benefit obligations for the affected pension plans as of the nearest month-end, August 31, 2019, resulting in a net actuarial loss of $425 million. This reflects a benefit obligation gain of $180 million resulting from the benefit plan change that was offset by remeasurement losses of $605 million. The remeasurement losses are driven by a reduction of 124 basis points in the projected benefit obligation (PBO) discount rate as of the remeasurement date compared to December 31, 2018, partially offset by actual asset returns of approximately 17% as of the remeasurement date.

In September 2019, we recorded a curtailment gain of $98 million in the Consolidated Statement of Operations, due to the recognition of previously unrecognized prior service credits for the affected pension plans. Additionally, as a result of the remeasurement, pension income (excluding curtailment) decreased by approximately $39 million for the year ended December 31, 2019.

The amounts included in "Other" in the above table primarily reflect the impact of foreign exchange translation, primarily for plans in the U.K. and Canada.

As part of the Rockwell acquisition on November 26, 2018, we assumed approximately $3.7 billion of pension projected benefit obligations and $3.4 billion of plan assets.

Qualified domestic pension plan benefits comprise approximately 75% of the projected benefit obligation. Benefits for union employees are generally based on a stated amount for each year of service. For non-union employees, benefits for service up to December 31, 2014 are generally based on an employee's years of service and compensation through December 31, 2014. Benefits for service after December 31, 2014 through December 31, 2019 are based on the existing cash balance formula that was adopted in 2003 for newly hired non-union employees and for other non-union employees who made a one-time voluntary election to have future benefit accruals determined under this formula. Certain foreign plans, which comprise approximately 24% of the projected benefit obligation, are considered defined benefit plans for accounting purposes. Nonqualified domestic pension plans provide supplementary retirement benefits to certain employees and are not a material component of the projected benefit obligation.

We made $25 million of cash contributions to our domestic defined benefit pension plans and made $93 million of cash contributions to our foreign defined benefit pension plans in 2019. In 2018, we made no cash contributions to our domestic defined benefit pension plans and made $147 million of cash contributions to our foreign defined benefit pension plans.

Information for pension plans with accumulated benefit obligations in excess of plan assets:


(dollars in millions)	2019		2018
Projected benefit obligation	$	39,267	$	25,884
Accumulated benefit obligation	38,816		25,455
Fair value of plan assets	36,530		22,803

Information for pension plans with projected benefit obligations in excess of plan assets:


(dollars in millions)	2019		2018
Projected benefit obligation	$	39,680	$	28,591
Accumulated benefit obligation	39,178		27,968
Fair value of plan assets	36,921		25,362

The accumulated benefit obligation for all defined benefit pension plans was $41.3 billion and $37.0 billion at December 31, 2019 and 2018, respectively.

The components of the net periodic pension benefit are as follows:


(dollars in millions)	2019		2018		2017
Pension Benefits:
Service cost	$	359	$	372	$	374
Interest cost	1,340		1,117		1,120
Expected return on plan assets	(2,430)		(2,255)		(2,215)
Amortization of prior service cost (credit)	17		(41)		(36)

Recognized actuarial net loss	265		401		575
Net settlement, curtailment and special termination benefits (gain) loss	(54)		1		3
Net periodic pension benefit - employer	$	(503)	$	(405)	$	(179)

Other changes in plan assets and benefit obligations recognized in other comprehensive loss in 2019 are as follows:


(dollars in millions)
Current year actuarial loss	$	553
Amortization of actuarial loss	(265)
Current year prior service cost	6
Amortization of prior service cost	(17)
Net settlement and curtailment	57
Other	34
Total recognized in other comprehensive loss	$	368
Net recognized in net periodic pension benefit and other comprehensive loss	$	(135)

The amount included in "Other" in the above table primarily reflects the impact of foreign exchange translation, primarily for plans in the U.K. and Canada.

The estimated amount that will be amortized from accumulated other comprehensive loss into net periodic pension (benefit) cost in 2020 is as follows:


(dollars in millions)
Net actuarial loss	$	371
Prior service cost	51
	$	422

Major assumptions used in determining the benefit obligation and net cost for pension plans are presented in the following table as weighted-averages:


	Benefit Obligation						Net Cost
	2019		2018		2019		2018		2017
Discount rate
PBO	3.0	%	4.0	%	3.9	%	3.4	%	3.8	%
Interest cost¹	—		—		3.6	%	3.0	%	3.3	%
Service cost¹	—		—		3.6	%	3.3	%	3.6	%
Salary scale	4.2	%	4.2	%	4.2	%	4.2	%	4.1	%
Expected return on plan assets	—		—		6.7	%	6.8	%	7.3	%

Note 1 The discount rates used to measure the service cost and interest cost applies to our significant plans. The PBO discount rate is used for the service cost and interest cost measurements for non-significant plans.

In determining the expected return on plan assets, we consider the relative weighting of plan assets, the historical performance of total plan assets and individual asset classes, and economic and other indicators of future performance. In addition, we may consult with and consider the opinions of financial and other professionals in developing appropriate capital market assumptions. Return projections are also validated using a simulation model that incorporates yield curves, credit spreads and risk premiums to project long-term prospective returns.

The plans' investment management objectives include providing the liquidity and asset levels needed to meet current and future benefit payments, while maintaining a prudent degree of portfolio diversification considering interest rate risk and market volatility. Globally, investment strategies target a mix of 45% to 50% of growth seeking assets and 50% to 55% of income generating and hedging assets using a wide set of diversified asset types, fund strategies and investment managers. The growth seeking allocation consists of global public equities in developed and emerging countries, private equity, real estate and multi-asset class strategies. Growth assets include an enhanced alpha strategy that invests in publicly traded equity and fixed income securities, derivatives and foreign currency. Investments in private equity are primarily via limited partnership interests in buy-out strategies with smaller allocations to distressed debt funds. The real estate strategy is principally concentrated in directly held U.S. core investments with some smaller investments in international, value-added and opportunistic strategies. Within the income generating assets, the fixed income portfolio consists of mainly government and broadly diversified high quality corporate bonds.

The plans have continued their pension risk management techniques designed to reduce their interest rate risk. Specifically, the plans have incorporated liability hedging programs that include the adoption of a risk reduction objective as part of the long-term investment strategy. Under this objective the interest rate hedge is intended to increase as funded status improves. The hedging programs incorporate a range of assets and investment tools, each with varying interest rate sensitivities. As result of the improved funded status of the plans due to favorable asset returns and funding of the plans, the interest rate hedge increased significantly during 2017. The investment portfolios are currently hedging approximately 65% to 70% of the interest rate sensitivity of the pension plan liabilities.

As a result of the shift in the target asset mix to higher income generating and hedging assets and lower growth seeking assets, combined with reduced capital market assumptions for most asset classes, we will reduce the expected return on plan assets assumption for 2020 including the assumption of a 6.5% return on plan assets for our qualified domestic pension plans, down from 7.0% in 2019.

The fair values of pension plan assets at December 31, 2019 and 2018 by asset category are as follows:


(dollars in millions)	Quoted Prices in Active Markets For Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Not Subject to Leveling		Total
Asset Category:
Public Equities
Global Equities	$	3,588	$	5	$	—	$	—	$	3,593
Global Equity Commingled Funds¹	—		1,734		—		—		1,734
Enhanced Global Equities²	322		393		—		—		715
Global Equity Funds at net asset value⁸	—		—		—		6,318		6,318
Private Equities^3,8	—		—		202		1,230		1,432
Fixed Income Securities
Governments	969		116		—		—		1,085
Corporate Bonds	1		13,059		5		—		13,065
Structured Products	—		17		—		—		17
Fixed Income Securities⁸	—		—		—		6,262		6,262
Real Estate^4,8	—		13		1,464		372		1,849
Other^5,8	—		343		—		2,834		3,177
Cash & Cash Equivalents^6,8	—		47		—		76		123
Subtotal	$	4,880	$	15,727	$	1,671	$	17,092	39,370
Other Assets & Liabilities⁷									319
Total at December 31, 2019									$	39,689
Public Equities
Global Equities	$	2,917	$	4	$	—	$	—	$	2,921
Global Equity Commingled Funds¹	185		426		—		—		611
Enhanced Global Equities²	79		605		—		—		684
Global Equity Funds at net asset value ⁸	—		—		—		7,386		7,386
Private Equities^3,8	—		—		133		1,194		1,327
Fixed Income Securities
Governments	1,789		162		—		—		1,951
Corporate Bonds	—		11,527		18		29		11,574

Fixed Income Securities⁸	—		—		—		3,599		3,599
Real Estate^4,8	—		13		1,387		429		1,829
Other^5,8	—		262		—		2,368		2,630
Cash & Cash Equivalents^6,8	—		220		—		138		358
Subtotal	$	4,970	$	13,219	$	1,538	$	15,143	34,870
Other Assets & Liabilities⁷									383
Total at December 31, 2018									$	35,253

Note 1 Represents commingled funds that invest primarily in common stocks.

Note 2 Represents enhanced equity separate account and commingled fund portfolios. A portion of the portfolio may include long-short market neutral and relative value strategies that invest in publicly traded, equity and fixed income securities, as well as derivatives of equity and fixed income securities and foreign currency.

Note 3 Represents limited partner investments with general partners that primarily invest in debt and equity.

Note 4 Represents investments in real estate including commingled funds and directly held properties.

Note 5 Represents insurance contracts and global balanced risk commingled funds consisting mainly of equity, bonds and some commodities.

Note 6 Represents short-term commercial paper, bonds and other cash or cash-like instruments.

Note 7 Represents trust receivables and payables that are not leveled.

Note 8 In accordance with ASU 2015-07, Fair Value Measurement (Topic 820), certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented for the total pension benefits plan assets.

Derivatives in the plan are primarily used to manage risk and gain asset class exposure while still maintaining liquidity. Derivative instruments mainly consist of equity futures, interest rate futures, interest rate swaps and currency forward contracts.

Our common stock represents less than 1% of total plan assets at December 31, 2019 and 2018. We review our assets at least quarterly to ensure we are within the targeted asset allocation ranges and, if necessary, asset balances are adjusted back within target allocations. We employ a broadly diversified investment manager structure that includes diversification by active and passive management, style, capitalization, country, sector, industry and number of investment managers.

The fair value measurement of plan assets using significant unobservable inputs (Level 3) changed due to the following:


(dollars in millions)	Private Equities		Corporate Bonds		Real Estate		Total
Balance, December 31, 2017	$	46	$	—	$	1,446	$	1,492
Plan assets acquired	—		33		—		33
Realized (losses) gains	—		(1)		10		9
Unrealized gains relating to instruments still held in the reporting period	—		2		38		40
Purchases, sales, and settlements, net	87		(16)		(107)		(36)
Balance, December 31, 2018	133		18		1,387		1,538

Realized losses	—		—		(2)		(2)
Unrealized gains relating to instruments still held in the reporting period	32		—		27		59
Purchases, sales, and settlements, net	37		(13)		52		76
Balance, December 31, 2019	$	202	$	5	$	1,464	$	1,671

Quoted market prices are used to value investments when available. Investments in securities traded on exchanges, including listed futures and options, are valued at the last reported sale prices on the last business day of the year or, if not available, the last reported bid prices. Fixed income securities are primarily measured using a market approach pricing methodology, where observable prices are obtained by market transactions involving identical or comparable securities of issuers with similar credit ratings. Mortgages have been valued on the basis of their future principal and interest payments discounted at prevailing interest rates for similar investments. Investment contracts are valued at fair value by discounting the related cash flows based on current yields of similar instruments with comparable durations. Real estate investments are valued on a quarterly basis using discounted cash flow models which consider long-term lease estimates, future rental receipts and estimated residual values. Valuation estimates are supplemented by third-party appraisals on an annual basis.

Private equity limited partnerships are valued quarterly using discounted cash flows, earnings multiples and market multiples. Valuation adjustments reflect changes in operating results, financial condition, or prospects of the applicable portfolio company. Over-the-counter securities and government obligations are valued at the bid prices or the average of the bid and ask prices on the last business day of the year from published sources or, if not available, from other sources considered reliable, generally broker quotes. Temporary cash investments are stated at cost, which approximates fair value.

As a result of the $1.9 billion contribution in 2017, we are not required to make additional contributions to our domestic defined benefit pension plans through the end of 2025. We expect to make total contributions of approximately $125 million to our global defined benefit pension plans in 2020. Contributions do not reflect benefits to be paid directly from corporate assets.

Benefit payments, including amounts to be paid from corporate assets, and reflecting expected future service, as appropriate, are expected to be paid as follows: $2,428 million in 2020, $2,230 million in 2021, $2,263 million in 2022, $2,289 million in 2023, $2,303 million in 2024, and $11,597 million from 2025 through 2029.

Postretirement Benefit Plans. We sponsor a number of postretirement benefit plans that provide health and life benefits to eligible retirees. Such benefits are provided primarily from domestic plans, which comprise approximately 84% of the benefit obligation. The postretirement plans are primarily unfunded. The assets we hold are invested in approximately 50% growth seeking assets and 50% income generating assets.


(dollars in millions)	2019		2018
Change in Benefit Obligation:
Beginning balance	$	810	$	767
Service cost	2		2
Interest cost	31		26
Actuarial gain	(11)		(52)
Total benefits paid	(69)		(70)
Business combinations	—		186
Plan amendments	—		(43)
Other	2		(6)
Ending balance	$	765	$	810

Change in Plan Assets:
Beginning balance	$	20	$	—

Employer contributions	69		69
Benefits paid	(69)		(70)
Business combinations	—		20
Other	—		1
Ending balance	$	20	$	20

Funded Status:
Fair value of plan assets	$	20	$	20
Benefit obligations	(765)		(810)
Funded status of plan	$	(745)	$	(790)

Amounts Recognized in the Consolidated Balance Sheet Consist of:
Current liability	$	(47)	$	(61)
Noncurrent liability	(698)		(729)
Net amount recognized	$	(745)	$	(790)

Amounts Recognized in Accumulated Other Comprehensive Loss Consist of:
Net actuarial gain	$	(181)	$	(184)
Prior service credit	(4)		(47)
Net amount recognized	$	(185)	$	(231)

As part of our acquisition of Rockwell on November 26, 2018, we assumed approximately $186 million of postretirement benefit obligations and $20 million of plan assets.

We modified the postretirement medical benefits provided to legacy Rockwell salaried employees by eliminating any company subsidy from retirements that occur after December 31, 2019. This resulted in a $43 million reduction in the benefit obligation as of November 26, 2018.

The components of net periodic benefit cost are as follows:


(dollars in millions)	2019		2018		2017
Other Postretirement Benefits:
Service cost	$	2	$	2	$	2
Interest cost	31		26		29
Expected return on plan assets	(1)		—		—
Amortization of prior service credit	(42)		(6)		(1)
Recognized actuarial net gain	(12)		(10)		(9)

Net periodic other postretirement (benefit) cost	$	(22)	$	12	$	21

Other changes in plan assets and benefit obligations recognized in other comprehensive loss in 2019 are as follows:


(dollars in millions)
Current year actuarial gain	$	(10)

Amortization of prior service credit	42
Amortization of actuarial net gain	12
Other	2
Total recognized in other comprehensive loss	$	46
Net recognized in net periodic other postretirement benefit cost and other comprehensive loss	$	24

The estimated amounts that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in 2020 include actuarial net gains of $13 million and prior service credits of $3 million.

Major assumptions used in determining the benefit obligation and net cost for postretirement plans are presented in the following table as weighted-averages:


	Benefit Obligation						Net Cost
	2019		2018		2019		2018		2017
Discount rate	3.0	%	4.1	%	4.0	%	3.4	%	3.8	%
Expected return on assets	—		—		7.0	%	7.0	%	N/A

Assumed health care cost trend rates are as follows:


	2019		2018
Health care cost trend rate assumed for next year	6.5	%	7.0	%
Rate that the cost trend rate gradually declines to	5.0	%	5.0	%
Year that the rate reaches the rate it is assumed to remain at	2026		2026

Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. A one-percentage-point change in assumed health care cost trend rates would have the following effects:


	2019 One-Percentage-Point
(dollars in millions)	Increase		Decrease
Effect on total service and interest cost	$	1	$	(1)
Effect on postretirement benefit obligation	25		(22)

Benefit payments, including net amounts to be paid from corporate assets and reflecting expected future service, as appropriate, are expected to be paid as follows: $67 million in 2020, $64 million in 2021, $60 million in 2022, $56 million in 2023, $53 million in 2024, and $210 million from 2025 through 2029.

Multiemployer Benefit Plans. We contribute to various domestic and foreign multiemployer defined benefit pension plans. The risks of participating in these multiemployer plans are different from single-employer plans in that assets contributed are pooled and may be used to provide benefits to employees of other participating employers. If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers. Lastly, if we choose to stop participating in some of our multiemployer plans, we may be required to pay those plans a withdrawal liability based on the underfunded status of the plan.

Our participation in these plans for the annual periods ended December 31 is outlined in the table below. Unless otherwise noted, the most recent Pension Protection Act (PPA) zone status available in 2019 and 2018 is for the plan's year-end at June 30, 2018, and June 30, 2017, respectively. The zone status is based on information that we received from the plan and is certified by the plan's actuary. Our significant plan is in the green zone which represents a plan that is at least 80% funded and does not require a financial improvement plan (FIP) or a rehabilitation plan (RP). An extended amortization provision of ten years is utilized to recognize investment gains or losses for our significant plan.


(dollars in millions)		Pension Protection Act Zone Status			FIP/ RP Status		Contributions
Pension Fund	EIN/Pension Plan Number	2019	2018	Pending/ Implemented	2019		2018		2017		Surcharge Imposed	Expiration Date of Collective-Bargaining Agreement
National Elevator Industry Pension Plan	23-2694291	Green	Green	No	$	127	$	120	$	114	No	July 8, 2022
Other funds					32		31		31
					$	159	$	151	$	145

For the plan years ended June 30, 2018 and 2017, respectively, we were listed in the National Elevator Industry Pension Plan's Forms 5500 as providing more than 5% of the total contributions for the plan. At the date these financial statements were issued, Forms 5500 were not available for the plan year ending June 30, 2019.

In addition, we participate in several multiemployer arrangements that provide postretirement benefits other than pensions, with the National Elevator Industry Health Benefit Plan being the most significant. These arrangements generally provide medical and life benefits for eligible active employees and retirees and their dependents. Contributions to multiemployer plans that provide postretirement benefits other than pensions were $21 million, $20 million and $19 million for 2019, 2018 and 2017, respectively.

Stock-based Compensation. UTC's long-term incentive plans authorize various types of market and performance based incentive awards that may be granted to officers and employees. The UTC 2018 Long-Term Incentive Plan (the "2018 LTIP") was approved by shareholders on April 30, 2018 and its predecessor plan (the "Legacy LTIP"), was last amended on February 5, 2016. A total of 184 million shares have been authorized for issuance pursuant to awards under these Plans. There are 252,000 shares outstanding that were issued under the Rockwell Collins, Inc. 2015 Long-Term Incentive Plan. No new equity awards will be issued under that plan. As of December 31, 2019, approximately 42 million shares remain available for awards under the 2018 LTIP. No shares remain available for future awards under the Legacy LTIP. Neither plan contains an aggregate annual award limit, however, each Plan sets an annual award limit per participant. We expect that the shares awarded on an annual basis will range from 1.0% to 1.5% of shares outstanding. The 2018 LTIP will expire after all authorized shares have been awarded or April 30, 2028, whichever is sooner.

Under both Plans, the exercise price of awards is set on the grant date and may not be less than the fair market value per share on that date. Generally, stock appreciation rights and stock options have a term of ten years and a three-year vesting period, subject to limited exceptions. In the event of retirement, annual stock appreciation rights, stock options, and restricted stock units held for more than one year may become vested and exercisable, subject to certain terms and conditions. LTIP awards with performance-based vesting generally have a minimum three-year vesting period and vest based on actual performance against pre-established metrics. In the event of retirement, performance-based awards held for more than one year, remain eligible to vest based on actual performance relative to target metrics. We have historically repurchased shares of our common stock in an amount at least equal to the number of shares issued under our equity compensation arrangements and will continue to evaluate this policy in conjunction with our overall share repurchase program.

We measure the cost of all share-based payments, including stock options, at fair value on the grant date and recognize this cost in the Consolidated Statement of Operations, net of expected forfeitures, as follows:


(dollars in millions)	2019		2018		2017

Total compensation cost recognized	$	356	$	251	$	192

The associated future income tax benefit recognized was $66 million, $42 million and $38 million for the years ended December 31, 2019, 2018 and 2017, respectively. The amounts have been adjusted for the impact of the TCJA.

For the years ended December 31, 2019, 2018 and 2017, the amount of cash received from the exercise of stock options was $27 million, $36 million and $29 million, respectively, with an associated tax benefit realized of $75 million, $59 million and $100 million, respectively. In addition, for the years ended December 31, 2019, 2018 and 2017, the associated tax benefit realized from the vesting of performance share units and other restricted awards was $36 million, $13 million and $12 million, respectively.

At December 31, 2019, there was $291 million of total unrecognized compensation cost related to non-vested equity awards granted under long-term incentive plans. This cost is expected to be recognized ratably over a weighted-average period of 2.9 years.

A summary of the transactions under all long-term incentive plans for the year ended December 31, 2019 follows:


	Stock Options				Stock Appreciation Rights					Performance Share Units	Other Incentive Shares/Units
(shares and units in thousands)	Shares	Average Price*		Shares	Average Price*		Units	Average Price*
Outstanding at:
December 31, 2018	1,603	$	99.89	32,066	$	99.95	1,806	$	110.41	3,047
Granted	339	124.72		8,081	123.54		839	121.22		1,223
Ancillary**	—	—		—	—		101	95.28		—
Exercised / earned	(317)	88.61		(6,843)	84.44		(758)	95.28		(816)
Cancelled	(57)	121.69		(591)	122.76		(69)	118.21		(135)

December 31, 2019	1,568	$	106.75	32,713	$	108.61	1,919	$	120.04	3,319

* weighted-average grant / exercise price

** ancillary shares earned based on actual performance achieved on the 2016 award

The weighted-average grant date fair value of stock options and stock appreciation rights granted during 2019, 2018 and 2017 was $20.81, $20.24 and $17.22, respectively. The weighted-average grant date fair value of performance share units, which vest upon achieving certain performance metrics, granted during 2019, 2018 and 2017 was $117.87, $131.55 and $111.00, respectively. The total fair value of awards vested during the years ended December 31, 2019, 2018 and 2017 was $211 million, $149 million and $138 million, respectively. The total intrinsic value (which is the amount by which the stock price exceeded the exercise price on the date of exercise) of stock options and stock appreciation rights exercised during the years ended December 31, 2019, 2018 and 2017 was $383 million, $283 million and $320 million, respectively. The total intrinsic value (which is the stock price at vesting) of performance share units and other restricted awards vested was $188 million, $74 million and $49 million during the years ended December 31, 2019, 2018 and 2017, respectively.

The following table summarizes information about equity awards outstanding that are vested and expected to vest as well as equity awards outstanding that are exercisable at December 31, 2019:


	Equity Awards Vested and Expected to Vest											Equity Awards That Are Exercisable
(shares in thousands; aggregate intrinsic value in millions)	Awards	Average Price*		Aggregate Intrinsic Value		Remaining Term**	Awards	Average Price*		Aggregate Intrinsic Value		Remaining Term**
Stock Options/Stock Appreciation Rights	33,769	$	107.58	$	1,424	5.9 years	19,285	$	96.56	$	1,026	4.0 years
Performance Share Units/Restricted Stock	5,514	—		826		2.1 years

* weighted-average exercise price per share

** weighted-average contractual remaining term in years

The fair value of each option award is estimated on the date of grant using a binomial lattice model. The following table indicates the assumptions used in estimating fair value for the years ended December 31, 2019, 2018 and 2017. Lattice-based option models incorporate ranges of assumptions for inputs; those ranges are as follows:


	2019		2018		2017
Expected volatility	18.8% - 19.7%		17.5% - 21.1%		19	%
Weighted-average volatility	20	%	18	%	19	%
Expected term (in years)	6.5 - 6.6		6.5 - 6.6		6.5
Expected dividend yield	2.4	%	2.2	%	2.4	%
Risk-free rate	2.3% - 2.7%		1.3% - 2.7%		0.5% - 2.5%

Expected volatilities are based on the returns of our stock, including implied volatilities from traded options on our stock for the binomial lattice model. We use historical data to estimate equity award exercise and employee termination behavior within the valuation model. The expected term represents an estimate of the period of time equity awards are expected to remain outstanding. The risk-free rate is based on the term structure of interest rates at the time of equity award grant.

Income Taxes

12 Months Ended

Dec. 31, 2019

Income Tax Contingency [Line Items]

Income Taxes

INCOME TAXES

Income Before Income Taxes. The sources of income from continuing operations before income taxes are:


(dollars in millions)	2019		2018		2017
United States	$	3,207	$	3,630	$	2,990
Foreign	5,036		4,650		4,773
	$	8,243	$	8,280	$	7,763

On December 22, 2017 Public Law 115-97 “An Act to Provide for Reconciliation Pursuant to Titles II and V of the Concurrent Resolution on the Budget for Fiscal Year 2018” was enacted. This law is commonly referred to as the Tax Cuts and Jobs Act of 2017 (TCJA).

The Company no longer intends to reinvest certain undistributed earnings of its international subsidiaries that have been previously taxed in the U.S. As such, in 2018 it recorded the international taxes associated with the future remittance of these earnings. For the remainder of the Company’s undistributed international earnings, unless tax effective to repatriate, UTC will continue to permanently reinvest these earnings. As of December 31, 2019, such undistributed earnings were approximately $21 billion, excluding other comprehensive income amounts. It is not practicable to estimate the amount of tax that might be payable on the remaining amounts.

Provision for Income Taxes. The income tax expense (benefit) for the years ended December 31, 2019, 2018 and 2017 consisted of the following components:


(dollars in millions)	2019		2018		2017
Current:
United States:
Federal	$	188	$	442	$	1,577
State	48		211		64
Foreign	2,024		1,238		1,140
	2,260		1,891		2,781
Future:
United States:
Federal	111		57		(27)
State	52		62		84
Foreign	(128)		616		5
	35		735		62
Income tax expense	$	2,295	$	2,626	$	2,843
Attributable to items credited (charged) to equity	$	40	$	501	$	(128)

Reconciliation of Effective Income Tax Rate. Differences between effective income tax rates and the statutory U.S. federal income tax rate are as follows:


	2019		2018		2017
Statutory U.S. federal income tax rate	21.0	%	21.0	%	35.0	%
Tax related separation activities	8.8	%	—	%	—	%
Tax on international activities	1.9	%	0.9	%	(6.4)	%
Tax audit settlements	(3.5)	%	—	%	(0.7)	%
U.S. tax reform	—	%	9.0	%	8.9	%
Other	(0.4)	%	0.8	%	(0.2)	%
Effective income tax rate	27.8	%	31.7	%	36.6	%

The 2019 effective tax rate includes $729 million of income taxes associated with the Company’s portfolio separation transactions, offset in part by amounts associated with the conclusion of the audit by the Examination Division of the Internal Revenue Service for the UTC 2014, 2015 and 2016 tax years, the filing by a subsidiary of the Company to participate in an amnesty program offered by the Italian Tax Authority.

The 2019 increase in the cost of U.S. and foreign tax on international activities is primarily attributable to the full phase-in of the TCJA provisions on the Company’s international subsidiaries. The increase in the benefit of other activities is primarily related to additional research and development credits and equity compensation deductions.

The 2018 effective tax rate reflects a net tax charge of $744 million for TCJA related adjustments. The amount is primarily associated with non-U.S. taxes that will become due when previously reinvested earnings of certain international subsidiaries are remitted. The 2018 and 2019 effective tax rate reconciliation reflects the corporate rate reduction enacted by the TCJA. The decrease in international activities is primarily related to higher international tax costs compared to the U.S. federal statutory rate.

The 2017 effective tax rate reflects a net tax charge of $690 million attributable to the passage of the TCJA. These 2017 provisional amounts, recorded as described in SAB 118, relate to U.S. income tax attributable to previously undistributed earnings of UTC’s international subsidiaries and equity investments, net of foreign tax credits, and the revaluation of U.S. deferred income taxes.

Deferred Tax Assets and Liabilities. Future income taxes represent the tax effects of transactions which are reported in different periods for tax and financial reporting purposes. These amounts consist of the tax effects of temporary differences between the tax and financial reporting balance sheets and tax carryforwards. Future income tax benefits and payables within the same tax paying component of a particular jurisdiction are offset for presentation in the Consolidated Balance Sheet.

The tax effects of temporary differences and tax carryforwards which gave rise to future income tax benefits and payables at December 31, 2019 and 2018 are as follows:


(dollars in millions)	2019		2018
Future income tax benefits:
Insurance and employee benefits	$	1,205	$	1,154
Other asset basis differences	829		1,013
Other liability basis differences	2,153		1,482
Tax loss carryforwards	622		583
Tax credit carryforwards	1,021		1,050
Valuation allowances	(616)		(605)
	$	5,214	$	4,677
Future income taxes payable:
Intangible assets	$	4,293	$	4,462
Other asset basis differences	2,904		2,159
Other items, net	143		123
	$	7,340	$	6,744

Valuation allowances have been established primarily for tax credit carryforwards, tax loss carryforwards, and certain foreign temporary differences to reduce the future income tax benefits to expected realizable amounts.

Tax Credit and Loss Carryforwards. At December 31, 2019, tax credit carryforwards, principally state and foreign, and tax loss carryforwards, principally state and foreign, were as follows:


(dollars in millions)	Tax Credit Carryforwards		Tax Loss Carryforwards
Expiration period:
2020-2024	$	59	$	393
2025-2029	27		179
2030-2039	336		394
Indefinite	599		2,218
Total	$	1,021	$	3,184

Unrecognized Tax Benefits. At December 31, 2019, we had gross tax-effected unrecognized tax benefits of $1,347 million, of which $1,338 million, if recognized, would impact the effective tax rate. A reconciliation of the beginning and ending amounts

of unrecognized tax benefits and interest expense related to unrecognized tax benefits for the years ended December 31, 2019, 2018 and 2017 is as follows:


(dollars in millions)	2019		2018		2017
Balance at January 1	$	1,619	$	1,189	$	1,086
Additions for tax positions related to the current year	131		192		192
Additions for tax positions of prior years	73		344		73
Reductions for tax positions of prior years	(101)		(91)		(91)
Settlements	(375)		(15)		(71)
Balance at December 31	$	1,347	$	1,619	$	1,189
Gross interest expense related to unrecognized tax benefits	$	57	$	37	$	34
Total accrued interest balance at December 31	$	249	$	255	$	215

The 2018 amounts above include amounts related to the acquisition of Rockwell Collins.

We conduct business globally and, as a result, UTC or one or more of our subsidiaries files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business we are subject to examination by taxing authorities throughout the world, including such major jurisdictions as Australia, Belgium, Brazil, Canada, China, France, Germany, Hong Kong, India, Italy, Japan, Mexico, Netherlands, Poland, Singapore, South Korea, Spain, Switzerland, the United Kingdom and the United States. With few exceptions, we are no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations for years before 2009.

During 2019, the Company recognized a net gain of approximately $307 million, including pre-tax interest of approximately $56 million as a result of the conclusion of the IRS audit of the Company’s 2014, 2015 and 2016 tax years as well as an amnesty filing in Italy made to resolve certain tax litigation. The Company also recognized a non-cash gain of approximately $40 million, primarily tax, as a result of the closure of an IRS audit of the 2014 tax year of a subsidiary acquired as part of UTC’s acquisition of Rockwell Collins. This gain was partially offset by the unfavorable pre-tax impact of a reversal of a related indemnity asset of approximately $23 million. Finally, the Company recognized net non-cash gains of approximately $18 million, including pre-tax interest of approximately $5 million, as a result of various federal, state and non-US statute of limitations expirations and settlements with tax authorities.

During 2017, the Company recognized a noncash gain of approximately $64 million, including a pre-tax interest adjustment of $9 million, as a result of federal, state and non-U.S. tax year closures related to audit resolutions and the expiration of applicable statutes of limitation, including expiration of the U.S. federal income tax statute of limitations for UTC’s 2013 tax year.

The Examination Division of the Internal Revenue Service (IRS) is currently auditing Rockwell Collins fiscal tax years 2016 and 2017, prior to its acquisition by UTC, which will continue into 2020. Separately, the Examination Division of the IRS has notified the Company of its intention to commence an audit of UTC tax years 2017 and 2018 during the first half of 2020.

It is reasonably possible that a net reduction within the range of $50 million to $650 million of unrecognized tax benefits may occur over the next 12 months as a result of the contemplated separation of Carrier and Otis, additional worldwide uncertain tax positions, the revaluation of current uncertain tax positions arising from developments in examinations, in appeals, or in the courts, or the closure of tax statutes.

See Note 18 "Contingent Liabilities" for discussion regarding uncertain tax positions, included in the above range, related to pending litigation with respect to certain deductions claimed in Germany.

Restructuring and Other Costs

12 Months Ended

Dec. 31, 2019

Restructuring and Related Activities [Abstract]

Restructuring and Related Activities Disclosure [Text Block]

During 2019, we recorded net pre-tax restructuring costs totaling $425 million for new and ongoing restructuring actions. We recorded charges in the segments as follows:


(dollars in millions)
Otis	$	54
Carrier	126
Pratt & Whitney	133
Collins Aerospace Systems	106
Eliminations and other	6


Total	$	425

Restructuring charges incurred in 2019 primarily relate to actions initiated during 2019 and 2018, and were recorded as follows:


(dollars in millions)
Cost of sales	$	231
Selling, general & administrative	190
Non-service pension (benefit)	4


Total	$	425

2019 Actions. During 2019, we recorded net pre-tax restructuring costs totaling $321 million for restructuring actions initiated in 2019, consisting of $168 million in cost of sales and $153 million in selling, general and administrative expenses. The 2019 actions relate to ongoing cost reduction efforts, including workforce reductions and consolidation of field operations.

We are targeting to complete in 2020 and 2021 the majority of the remaining workforce and all facility related cost reduction actions initiated in 2019. No specific plans for significant other actions have been finalized at this time. The following table summarizes the accrual balances and utilization by cost type for the 2019 restructuring actions:


(dollars in millions)	Severance		Facility Exit & Other Costs		Total
Net pre-tax restructuring costs	$	298	$	23	$	321
Utilization, foreign exchange and other costs	(193)		(10)		(203)
Balance at December 31, 2019	$	105	$	13	$	118

The following table summarizes expected, incurred and remaining costs for the 2019 restructuring actions by segment:


(dollars in millions)	Expected Costs		Cost Incurred During 2019		Remaining Costs at December 31, 2019
Otis	$	65	$	(45)	$	20
Carrier	120		(110)		10
Pratt & Whitney	133		(133)		—
Collins Aerospace Systems	120		(27)		93
Eliminations and other	6		(6)		—

Total	$	444	$	(321)	$	123

2018 Actions. During 2019, we recorded net pre-tax restructuring costs totaling $46 million for restructuring actions initiated in 2018, consisting of $21 million in cost of sales and $25 million in selling, general and administrative expenses. The 2018 actions relate to ongoing cost reduction efforts, including workforce reductions and the consolidation of field operations. The following table summarizes the accrual balances and utilization by cost type for the 2018 restructuring actions:


(dollars in millions)	Severance		Facility Exit & Other Costs		Total
Restructuring accruals at January 1, 2019	$	115	$	23	$	138
Net pre-tax restructuring costs	38		8		46
Utilization, foreign exchange and other costs	(132)		(29)		(161)
Balance at December 31, 2019	$	21	$	2	$	23

The following table summarizes expected, incurred and remaining costs for the 2018 programs by segment:


(dollars in millions)	Expected Costs		Costs Incurred During 2018		Costs Incurred During 2019		Remaining Costs at December 31, 2019
Otis	$	57	$	(48)	$	(7)	$	2
Carrier	80		(64)		(16)		—
Pratt & Whitney	3		(3)		—		—
Collins Aerospace Systems	111		(87)		(23)		1
Eliminations and other	7		(5)		—		2

Total	$	258	$	(207)	$	(46)	$	5

2017 and Prior Actions. During 2019, we recorded net pre-tax restructuring costs totaling $58 million for restructuring actions initiated in 2017 and prior. As of December 31, 2019, we have approximately $67 million of accrual balances remaining related to 2017 and prior actions.

Financial Instruments

12 Months Ended

Dec. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Financial Instruments Disclosure [Text Block]

NOTE 14: FINANCIAL INSTRUMENTS

We enter into derivative instruments primarily for risk management purposes, including derivatives designated as hedging instruments under the Derivatives and Hedging Topic of the FASB ASC and those utilized as economic hedges. We operate internationally and in the normal course of business, are exposed to fluctuations in interest rates, foreign exchange rates and commodity prices. These fluctuations can increase the costs of financing, investing and operating the business. We have used derivative instruments, including swaps, forward contracts and options to manage certain foreign currency, interest rate and commodity price exposures.

The four quarter rolling average of the notional amount of foreign exchange contracts hedging foreign currency transactions was $17.8 billion and $20.1 billion at December 31, 2019 and 2018, respectively. Additional information pertaining to foreign exchange and hedging activities is included in Note 1.

The following table summarizes the fair value and presentation in the Consolidated Balance Sheets for derivative instruments as of December 31, 2019 and 2018:


(dollars in millions)	Balance Sheet Location	December 31, 2019		December 31, 2018
Derivatives designated as hedging instruments:
Foreign exchange contracts	Asset Derivatives:
	Other assets, current	$	11	$	10
	Other assets	13		12
	Total asset derivatives	$	24	$	22
	Liability Derivatives:
	Accrued liabilities	(72)		(83)
	Other long-term liabilities	(98)		(111)
	Total liability derivatives	$	(170)	$	(194)
Derivatives not designated as hedging instruments:
Foreign exchange contracts	Asset Derivatives:
	Other assets, current	27		44
	Other assets	5		19
	Total asset derivatives	$	32	$	63
	Liability Derivatives:
	Accrued liabilities	(116)		(89)
	Other long-term liabilities	(1)		(3)
	Total liability derivatives	$	(117)	$	(92)

The effect of cash flow hedging relationships on accumulated other comprehensive income for the years ended December 31, 2019 and 2018 are presented in the table below. The amounts of gain or (loss) are attributable to foreign exchange contract activity and are recorded as a component of Product sales when reclassified from accumulated other comprehensive income.


	Year Ended December 31,
(dollars in millions)	2019		2018
Loss recorded in Accumulated other comprehensive loss	$	(33)	$	(307)
Loss (Gain) reclassified from Accumulated other comprehensive loss into Product sales	$	51	$	(16)

The table above reflects the effect of cash flow hedging relationships on the Consolidated Statement of Operations for the years ended December 31, 2019 and 2018. The Company utilizes the critical terms match method in assessing derivatives for hedge effectiveness. Accordingly, the hedged items and derivatives designated as hedging instruments are highly effective.

We have approximately €4.2 billion of euro-denominated long-term debt, which qualifies as a net investment hedge against our investments in European businesses. As of December 31, 2019, the net investment hedge is deemed to be effective.

Assuming current market conditions continue, a $32 million pre-tax loss is expected to be reclassified from Accumulated other comprehensive loss into Product sales to reflect the fixed prices obtained from foreign exchange hedging within the next 12 months. At December 31, 2019, all derivative contracts accounted for as cash flow hedges will mature by January 2024.

The effect of derivatives not designated as hedging instruments within Other income, net, on the Consolidated Statement of Operations was as follows:


	Year Ended December 31,
(dollars in millions)	2019		2018
Foreign exchange contracts	$	46	$	115

Fair Value Measurements

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

FAIR VALUE MEASUREMENTS

In accordance with the provisions of ASC 820, the following tables provide the valuation hierarchy classification of assets and liabilities that are carried at fair value and measured on a recurring and nonrecurring basis in our Consolidated Balance Sheet as of December 31, 2019 and 2018:


	December 31, 2019
(dollars in millions)	Total		Level 1		Level 2		Level 3
Recurring fair value measurements:
Available-for-sale securities	$	57	$	57	$	—	$	—
Derivative assets	56		—		56		—
Derivative liabilities	(287)		—		(287)		—


	December 31, 2018
(dollars in millions)	Total		Level 1		Level 2		Level 3
Recurring fair value measurements:
Available-for-sale securities	$	51	$	51	$	—	$	—
Derivative assets	85		—		85		—
Derivative liabilities	(286)		—		(286)		—

Valuation Techniques. Our available-for-sale securities include equity investments that are traded in active markets, either domestically or internationally, and are measured at fair value using closing stock prices from active markets. Our derivative assets and liabilities include foreign exchange contracts that are measured at fair value using internal models based on observable market inputs such as forward rates, interest rates, our own credit risk and our counterparties' credit risks. As of December 31, 2019, there were no significant transfers in or out of Level 1 or Level 2.

As of December 31, 2019, there has not been any significant impact to the fair value of our derivative liabilities due to our own credit risk. Similarly, there has not been any significant adverse impact to our derivative assets based on our evaluation of our counterparties' credit risks.

The following table provides carrying amounts and fair values of financial instruments that are not carried at fair value in our Consolidated Balance Sheet at December 31, 2019 and 2018:


	December 31, 2019						December 31, 2018
(dollars in millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Long-term receivables	$	344	$	347	$	334	$	314
Customer financing notes receivable	283		283		272		265
Short-term borrowings	(2,364)		(2,364)		(1,469)		(1,469)
Long-term debt (excluding finance leases)	(41,199)		(46,202)		(43,996)		(44,003)
Long-term liabilities	(336)		(322)		(508)		(467)

The following table provides the valuation hierarchy classification of assets and liabilities that are not carried at fair value in our Consolidated Balance Sheet as of December 31, 2019 and 2018:


	December 31, 2019
(dollars in millions)	Total		Level 1		Level 2		Level 3
Long-term receivables	$	347	$	—	$	347	$	—
Customer financing notes receivable	283		—		283		—
Short-term borrowings	(2,364)		—		—		(2,364)
Long-term debt (excluding finance leases)	(46,202)		—		(45,802)		(400)
Long-term liabilities	(322)		—		(322)		—


	December 31, 2018
(dollars in millions)	Total		Level 1		Level 2		Level 3
Long-term receivables	$	314	$	—	$	314	$	—
Customer financing notes receivable	265		—		265		—
Short-term borrowings	(1,469)		—		(1,258)		(211)
Long-term debt (excluding finance leases)	(44,003)		—		(43,620)		(383)
Long-term liabilities	(467)		—		(467)		—

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Variable Interest Entities (Notes)

12 Months Ended

Dec. 31, 2019

Schedule of Variable Interest Entities [Abstract]

Variable Interest Entity Disclosure [Text Block]

VARIABLE INTEREST ENTITIES

Pratt & Whitney holds a 61% program share interest in the International Aero Engines AG (IAE) collaboration with MTU Aero Engines AG (MTU) and Japanese Aero Engines Corporation (JAEC) and a 49.5% ownership interest in IAE. IAE's business purpose is to coordinate the design, development, manufacturing and product support of the V2500 engine program through involvement with the collaborators. Additionally, Pratt & Whitney, JAEC and MTU are participants in International Aero Engines, LLC (IAE LLC), whose business purpose is to coordinate the design, development, manufacturing and product support for the PW1100G-JM engine for the Airbus A320neo aircraft and the PW1400G-JM engine for the Irkut MC21 aircraft. Pratt & Whitney holds a 59% program share interest and a 59% ownership interest in IAE LLC. IAE and IAE LLC retain limited equity with the primary economics of the programs passed to the participants. As such, we have determined that IAE and IAE LLC are variable interest entities with Pratt & Whitney the primary beneficiary. IAE and IAE LLC have, therefore, been consolidated. The carrying amounts and classification of assets and liabilities for variable interest entities in our Consolidated Balance Sheet as of December 31, 2019 and 2018 are as follows:


(dollars in millions)	2019		2018
Current assets	$	4,573	$	4,732
Noncurrent assets	1,919		1,600
Total assets	$	6,492	$	6,332
Current liabilities	$	4,916	$	4,946
Noncurrent liabilities	2,149		1,898
Total liabilities	$	7,065	$	6,844

Guarantees

12 Months Ended

Dec. 31, 2019

Guarantees [Abstract]

Guarantees

We extend a variety of financial, market value and product performance guarantees to third parties. As of December 31, 2019 and 2018, the following financial guarantees were outstanding:


	December 31, 2019						December 31, 2018
(dollars in millions)	Maximum Potential Payment		Carrying Amount of Liability		Maximum Potential Payment		Carrying Amount of Liability
Commercial aerospace financing arrangements (see Note 4)	$	333	$	7	$	348	$	9
Credit facilities and debt obligations	—		—		116		—
Performance guarantees	48		—		55		5

We also have obligations arising from sales of certain businesses and assets, including those from representations and warranties and related indemnities for environmental, health and safety, tax and employment matters. The maximum potential payment related to these obligations is not a specified amount as a number of the obligations do not contain financial caps. The carrying amount of liabilities related to these obligations was $166 million and $175 million at December 31, 2019 and 2018, respectively. For additional information regarding the environmental indemnifications, see Note 18.

We accrue for costs associated with guarantees when it is probable that a liability has been incurred and the amount can be reasonably estimated. The most likely cost to be incurred is accrued based on an evaluation of currently available facts, and where no amount within a range of estimates is more likely, the minimum is accrued. In accordance with the Guarantees Topic of the FASB ASC, we record these liabilities at fair value.

We provide service and warranty policies on our products and extend performance and operating cost guarantees beyond our normal service and warranty policies on some of our products, particularly commercial aircraft engines. In addition, we

incur discretionary costs to service our products in connection with specific product performance issues. Liabilities for performance and operating cost guarantees are based upon future product performance and durability, and are largely estimated based upon historical experience. Adjustments are made to accruals as claim data and historical experience warrant. The changes in the carrying amount of service and product warranties and product performance guarantees for the years ended December 31, 2019 and 2018 are as follows:


(dollars in millions)	2019		2018
Balance as of January 1	$	1,449	$	1,146
Warranties and performance guarantees issued	635		604
Settlements made	(512)		(493)
Other¹	(24)		192
Balance as of December 31	$	1,548	$	1,449

1 Other in 2018 is driven by the Rockwell Collins acquisition.

Contingent Liabilities	12 Months Ended
Contingent Liabilities	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities	CONTINGENT LIABILITIES Except as otherwise noted, while we are unable to predict the final outcome, based on information currently available, we do not believe that resolution of any of the following matters will have a material adverse effect upon our competitive position, results of operations, cash flows or financial condition. Environmental. Our operations are subject to environmental regulation by federal, state and local authorities in the United States and regulatory authorities with jurisdiction over our foreign operations. As described in Note 1 to the Consolidated Financial Statements, we have accrued for the costs of environmental remediation activities, including but not limited to investigatory, remediation, operating and maintenance costs and performance guarantees, and periodically reassess these amounts. We believe that the likelihood of incurring losses materially in excess of amounts accrued is remote. As of December 31, 2019 and 2018, we had approximately $896 million and $830 million, respectively reserved for environmental remediation. Additional information pertaining to environmental matters is included in Note 1 to the Consolidated Financial Statements. Government. In the ordinary course of business, the Company and its subsidiaries and our properties are subject to regulatory and governmental examinations, information gathering requests, inquiries, investigations and threatened legal actions and proceedings. For example, we are now, and believe that, in light of the current U.S. Government contracting environment, we will continue to be the subject of one or more U.S. Government investigations. Such U.S. Government investigations often take years to complete and could result in administrative, civil or criminal liabilities, including repayments, fines, treble and other damages, forfeitures, restitution or penalties, or could lead to suspension or debarment of U.S. Government contracting privileges. For instance, if we or one of our business units were charged with wrongdoing as a result of any of these investigations or other government investigations (including violations of certain environmental or export laws) the U.S. Government could suspend us from bidding on or receiving awards of new U.S. Government contracts pending the completion of legal proceedings. If convicted or found liable, the U.S. Government could fine and debar us from new U.S. Government contracting for a period generally not to exceed three years. The U.S. Government also reserves the right to debar a contractor from receiving new government contracts for fraudulent, criminal or other seriously improper conduct. The U.S. Government could void any contracts found to be tainted by fraud. Our contracts with the U.S. Government are also subject to audits. Like many defense contractors, we have received audit reports recommending the reduction of certain contract prices because, for example, cost or pricing data or cost accounting practices used to price and negotiate those contracts may not have conformed to government regulations. Some of these audit reports recommend that certain payments be repaid, delayed, or withheld, and may involve substantial amounts. We have made voluntary refunds in those cases we believe appropriate, have settled some allegations and, in some cases, continue to negotiate and/or litigate. The Company may be, and has been, required to make payments into escrow of disputed liabilities while the related litigation is pending. If the litigation is resolved in the Company’s favor, any such payments will be returned to the Company with interest. In addition, we accrue for liabilities associated with those matters that are probable and can be reasonably estimated. The most likely settlement amount to be incurred is accrued based upon a range of estimates. Where no amount within a range of estimates is more likely, then we accrue the minimum amount. Legal Proceedings. Cost Accounting Standards Claims As previously disclosed, in April 2019, a Divisional Administrative Contracting Officer (DACO) of the United States Defense Contract Management Agency (DCMA) asserted a claim against Pratt & Whitney to recover overpayments of approximately $1.73 billion plus interest (approximately $563 million through December 31, 2019). The claim is based on Pratt & Whitney's alleged noncompliance with cost accounting standards from January 1, 2007 to March 31, 2019, due to its method of allocating independent research and development costs to government contracts. Pratt & Whitney believes that the claim is without merit and filed an appeal to the Armed Services Board of Contract Appeals (ASBCA) on June 7, 2019. As previously disclosed, in December 2013, a DCMA DACO asserted a claim against Pratt & Whitney to recover overpayments of approximately $177 million plus interest (approximately $98.4 million through December 31, 2019). The claim is based on Pratt & Whitney's alleged noncompliance with cost accounting standards from January 1, 2005 to December 31, 2012, due to its method of determining the cost of collaborator parts used in the calculation of material overhead costs for government contracts. In 2014, Pratt & Whitney filed an appeal to the ASBCA. An evidentiary hearing was held and completed in June 2019. The parties are now engaged in post-hearing briefing, and a decision from the ASBCA will follow. We continue to believe that the claim is without merit. In December 2018, a DCMA DACO issued a second claim against Pratt & Whitney that similarly alleges that its method of determining the cost of collaborator parts does not comply with the cost accounting standards for calendar years 2013 through 2017. This second claim demands payment of $269 million plus interest (approximately $56.2 million through December 31, 2019), which we also believe is without merit and which Pratt & Whitney appealed to the ASBCA in January 2019. German Tax Litigation As previously disclosed, UTC has been involved in administrative review proceedings with the German Tax Office, which concern approximately €215 million (approximately $239 million) of tax benefits that we have claimed related to a 1998 reorganization of the corporate structure of Otis operations in Germany. Upon audit, these tax benefits were disallowed by the German Tax Office. UTC estimates interest associated with the aforementioned tax benefits is an additional approximately €118 million (approximately $131 million). On August 3, 2012, we filed suit in the local German Tax Court (Berlin-Brandenburg). In March 2016, the local German Tax Court dismissed our suit, and we appealed this decision to the German Federal Tax Court (FTC). Following a hearing on July 24, 2018, the FTC remanded the matter to the local German Tax Court for further proceedings. In 2015, UTC made tax and interest payments to German tax authorities of €275 million (approximately $300 million) in order to avoid additional interest accruals pending final resolution of this matter. Asbestos Matters As previously disclosed, like many other industrial companies, we and our subsidiaries have been named as defendants in lawsuits alleging personal injury as a result of exposure to asbestos integrated into certain of our products or business premises. While we have never manufactured asbestos and no longer incorporate it in any currently-manufactured products, certain of our historical products, like those of many other manufacturers, have contained components incorporating asbestos. A substantial majority of these asbestos-related claims have been dismissed without payment or were covered in full or in part by insurance or other forms of indemnity. Additional cases were litigated and settled without any insurance reimbursement. The amounts involved in asbestos related claims were not material individually or in the aggregate in any year. The amounts recorded by UTC for asbestos-related liabilities are based on currently available information and assumptions that we believe are reasonable and are made with input from outside actuarial experts. The estimated range of total liabilities to resolve all pending and unasserted potential future asbestos claims through 2059 is approximately $330 million to $400 million. Where no amount within a range of estimates is more likely, the minimum is accrued. We have recorded the minimum amount of $330 million, which is principally recorded in Other long-term liabilities on our Consolidated Balance Sheet as of December 31, 2019. This amount is on a pre-tax basis, not discounted, and excludes the Company’s legal fees to defend the asbestos claims, which will continue to be expensed by the Company as they are incurred. In addition, the Company has an insurance recovery receivable for probable asbestos related recoveries of approximately $140 million, which is included primarily in Other assets on our Consolidated Balance Sheet as of December 31, 2019. The amounts recorded by UTC for asbestos-related liabilities and insurance recoveries are based on currently available information and assumptions that we believe are reasonable. Our actual liabilities or insurance recoveries could be higher or lower than those recorded if actual results vary significantly from the assumptions. Key variables in these assumptions include the number and type of new claims to be filed each year, the outcomes or resolution of such claims, the average cost of resolution of each new claim, the amount of insurance available, allocation methodologies, the contractual terms with each insurer with whom we have reached settlements, the resolution of coverage issues with other excess insurance carriers with whom we have not yet achieved settlements, and the solvency risk with respect to our insurance carriers. Other factors that may affect our future liability include uncertainties surrounding the litigation process from jurisdiction to jurisdiction and from case to case, legal rulings that may be made by state and federal courts, and the passage of state or federal legislation. At the end of each year, the Company will evaluate all of these factors and, with input from an outside actuarial expert, make any necessary adjustments to both our estimated asbestos liabilities and insurance recoveries. Other. As described in Note 17 to the Consolidated Financial Statements, we extend performance and operating cost guarantees beyond our normal warranty and service policies for extended periods on some of our products. We have accrued our estimate of the liability that may result under these guarantees and for service costs that are probable and can be reasonably estimated. We also have other commitments and contingent liabilities related to legal proceedings, self-insurance programs and matters arising out of the normal course of business. We accrue contingencies based upon a range of possible outcomes. If no amount within this range is a better estimate than any other, then we accrue the minimum amount. Of note, the design, development, production and support of new aerospace technologies is inherently complex and subject to risk. Since the PW1000G Geared TurboFan engine entered into service in 2016, technical issues have been identified and experienced with the engine, which is usual for new engines and new aerospace technologies. Pratt & Whitney has addressed these issues through various improvements and modifications. These issues have resulted in financial impacts, including increased warranty provisions, customer contract settlements, and reductions in contract performance estimates. Additional technical issues may also arise in the normal course, which may result in financial impacts that could be material to the Company’s financial position, results of operations and cash flows. In the ordinary course of business, the Company and its subsidiaries are also routinely defendants in, parties to or otherwise subject to many pending and threatened legal actions, claims, disputes and proceedings. These matters are often based on alleged violations of contract, product liability, warranty, regulatory, environmental, health and safety, employment, intellectual property, tax and other laws. In some of these proceedings, claims for substantial monetary damages are asserted against the Company and its subsidiaries and could result in fines, penalties, compensatory or treble damages or non-monetary relief. We do not believe that these matters will have a material adverse effect upon our competitive position, results of operations, cash flows or financial condition.

Segment Financial Data

12 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Segment Financial Data

SEGMENT FINANCIAL DATA

Our operations for the periods presented herein are classified into four principal segments. The segments are generally determined based on the management structure of the businesses and the grouping of similar operating companies, where each management organization has general operating autonomy over diversified products and services.

Otis products include elevators, escalators, moving walkways and service sold to customers in the commercial, residential and infrastructure property sectors around the world.

Carrier products and related services include HVAC and refrigeration systems, building controls and automation, fire and special hazard suppression systems and equipment, security monitoring and rapid response systems, provided to a diversified international customer base principally in the industrial, commercial and residential property and commercial transportation sectors.

Pratt & Whitney products include commercial, military, business jet and general aviation aircraft engines, parts and services sold to a diversified customer base, including international and domestic commercial airlines and aircraft leasing companies, aircraft manufacturers, and U.S. and foreign governments. Pratt & Whitney also provides product support and a full range of overhaul, repair and fleet management services.

Collins Aerospace Systems provides technologically advanced aerospace products and aftermarket service solutions for aircraft manufacturers, airlines, regional, business and general aviation markets, military and space operations. Products include electric power generation, power management and distribution systems, air data and aircraft sensing systems, engine control systems, intelligence, surveillance and reconnaissance systems, engine components, environmental control systems, fire and ice detection and protection systems, propeller systems, engine nacelle systems, including thrust reversers and mounting pylons, interior and exterior aircraft lighting, aircraft seating and cargo systems, actuation systems, landing systems, including landing gear, wheels and brakes, and space products and subsystems, integrated avionics systems, precision targeting, electronic warfare and range and training systems, flight controls, communications systems, navigation systems, oxygen systems, simulation and training systems, food and beverage preparation, storage and galley systems, lavatory and wastewater management systems. Aftermarket services include spare parts, overhaul and repair, engineering and technical support, training and fleet management solutions, and information management services.

We have reported our financial and operational results for the periods presented herein under the four principal segments noted above, consistent with how we have reviewed our business operations for decision-making purposes, resource allocation and performance assessment during 2019.

Segment Information. Total sales by segment include intersegment sales, which are generally made at prices approximating those that the selling entity is able to obtain on external sales. Segment information for the years ended December 31 is as follows:


	Net Sales										Operating Profits
(dollars in millions)	2019		2018		2017		2019		2018		2017
Otis	$	13,113	$	12,904	$	12,341	$	1,948	$	1,915	$	2,002
Carrier	18,608		18,922		17,812		2,697		3,777		3,165
Pratt & Whitney	20,892		19,397		16,160		1,668		1,269		1,300
Collins Aerospace Systems	26,028		16,634		14,691		4,100		2,303		2,191
Total segment	78,641		67,857		61,004		10,413		9,264		8,658
Eliminations and other	(1,595)		(1,356)		(1,167)		(932)		(236)		(81)
General corporate expenses	—		—		—		(515)		(475)		(439)
Consolidated	$	77,046	$	66,501	$	59,837	$	8,966	$	8,553	$	8,138


	Total Assets										Capital Expenditures								Depreciation & Amortization
(dollars in millions)	2019		2018		2017		2019		2018		2017		2019		2018		2017
Otis	$	9,973	$	9,374	$	9,421	$	145	$	172	$	133	$	337	$	190	$	177
Carrier	22,789		22,189		22,657		243		263		326		513		357		372
Pratt & Whitney	31,271		29,341		26,768		822		866		923		980		852		672
Collins Aerospace Systems	74,049		73,115		34,567		959		515		527		1,749		883		823
Total segment	138,082		134,019		93,413		2,169		1,816		1,909		3,579		2,282		2,044
Eliminations and other	1,634		192		3,507		87		86		105		204		151		96
Consolidated	$	139,716	$	134,211	$	96,920	$	2,256	$	1,902	$	2,014	$	3,783	$	2,433	$	2,140

Geographic External Sales and Operating Profit. Geographic external sales and operating profits are attributed to the geographic regions based on their location of origin. U.S. external sales include export sales to commercial customers outside the U.S. and sales to the U.S. Government, commercial and affiliated customers, which are known to be for resale to customers outside the U.S. Long-lived assets are net fixed assets attributed to the specific geographic regions.


	External Net Sales										Operating Profits								Long-Lived Assets
(dollars in millions)	2019		2018		2017		2019		2018		2017		2019		2018		2017
United States Operations	$	48,288	$	39,481	$	33,912	$	5,505	$	4,941	$	4,126	$	7,498	$	7,111	$	5,323
International Operations
Europe	13,664		12,857		11,879		2,476		2,141		1,959		1,889		1,908		1,817
Asia Pacific	9,391		8,847		8,770		1,662		1,476		1,491		1,359		1,349		1,113
Other	7,298		6,672		6,443		770		706		1,082		1,412		1,363		1,389
Eliminations and other	(1,595)		(1,356)		(1,167)		(1,447)		(711)		(520)		597		566		544
Consolidated	$	77,046	$	66,501	$	59,837	$	8,966	$	8,553	$	8,138	$	12,755	$	12,297	$	10,186

Sales from U.S. operations include export sales as follows:


(dollars in millions)	2019		2018		2017
Europe	$	7,122	$	6,285	$	5,273
Asia Pacific	6,479		5,429		3,634
Other	3,847		2,514		2,217
Total	$	17,448	$	14,228	$	11,124

Sales by primary geographical market for the year ended December 31, 2019 is as follows:


(dollars in millions)	Otis		Carrier		Pratt & Whitney		Collins Aerospace Systems		Total
Primary Geographical Markets
United States	$	3,589	$	9,574	$	16,148	$	18,977	$	48,288
Europe	3,919		5,326		498		3,921		13,664
Asia Pacific	4,591		2,811		1,164		825		9,391
Other*	1,014		897		3,082		2,305		7,298
Total segment	$	13,113	$	18,608	$	20,892	$	26,028	$	78,641
Eliminations and other									(1,595)
Consolidated									$	77,046

Sales by primary geographical market for the year ended December 31, 2018 is as follows:


(dollars in millions)	Otis		Carrier		Pratt & Whitney		Collins Aerospace Systems		Total
Primary Geographical Markets
United States	$	3,433	$	9,402	$	14,852	$	11,794	$	39,481
Europe	4,055		5,710		594		2,498		12,857
Asia Pacific	4,354		2,849		1,277		367		8,847
Other*	1,062		961		2,674		1,975		6,672
Total segment	$	12,904	$	18,922	$	19,397	$	16,634	$	67,857
Eliminations and other									(1,356)
Consolidated									$	66,501

*Other includes sales to other regions as well as intersegment sales.

Segment sales disaggregated by product type and product versus service for the year ended December 31, 2019 are as follows:


(dollars in millions)	Otis		Carrier		Pratt & Whitney		Collins Aerospace Systems		Total
Product Type
Commercial and industrial, non aerospace	$	13,113	$	18,608	$	102	$	51	$	31,874
Commercial aerospace	—		—		14,516		19,005		33,521
Military aerospace	—		—		6,274		6,972		13,246
Total segment	$	13,113	$	18,608	$	20,892	$	26,028	$	78,641
Eliminations and other									(1,595)
Consolidated									$	77,046

Sales Type
Product	$	5,669	$	15,360	$	12,977	$	21,440	$	55,446
Service	7,444		3,248		7,915		4,588		23,195
Total segment	$	13,113	$	18,608	$	20,892	$	26,028	$	78,641
Eliminations and other									(1,595)
Consolidated									$	77,046

Segment sales disaggregated by product type and product versus service for the year ended December 31, 2018 are as follows:


(dollars in millions)	Otis		Carrier		Pratt & Whitney		Collins Aerospace Systems		Total
Product Type
Commercial and industrial, non aerospace	$	12,904	$	18,922	$	55	$	60	$	31,941
Commercial aerospace	—		—		14,027		12,564		26,591
Military aerospace	—		—		5,315		4,010		9,325
Total segment	$	12,904	$	18,922	$	19,397	$	16,634	$	67,857
Eliminations and other									(1,356)
Consolidated									$	66,501

Sales Type
Product	$	5,636	$	15,682	$	11,410	$	13,915	$	46,643
Service	7,268		3,240		7,987		2,719		21,214
Total segment	$	12,904	$	18,922	$	19,397	$	16,634	$	67,857
Eliminations and other									(1,356)
Consolidated									$	66,501

Major Customers. Net Sales include sales under prime contracts and subcontracts to the U.S. Government, primarily related to Pratt & Whitney and Collins Aerospace Systems products, as follows:


(dollars in millions)	2019		2018		2017
Pratt & Whitney	$	5,614	$	4,489	$	3,347
Collins Aerospace Systems	4,802		2,779		2,299
Other	227		175		152
Total	$	10,643	$	7,443	$	5,798

Sales to Airbus prior to discounts and incentives, primarily related to Pratt & Whitney and Collins Aerospace Systems products, were approximately $9,879 million, $10,025 million and $8,908 million for the years ended December 31, 2019, 2018 and 2017, respectively.

Selected Quarterly Financial Data - Unaudited

12 Months Ended

Dec. 31, 2019

Selected Quarterly Financial Information [Abstract]

Quarterly Financial Information [Text Block]

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)


	2019 Quarters														2018 Quarters
(dollars in millions, except per share amounts)	First		Second		Third		Fourth		First		Second		Third		Fourth
Net Sales	$	18,365	$	19,634	$	19,496	$	19,551	$	15,242	$	16,705	$	16,510	$	18,044
Gross margin	4,658		5,221		5,285		4,817		3,962		4,283		3,974		4,297
Net income attributable to common shareowners	1,346		1,900		1,148		1,143		1,297		2,048		1,238		686
Earnings per share of Common Stock:
Basic - net income	$	1.58	$	2.22	$	1.34	$	1.33	$	1.64	$	2.59	$	1.56	$	0.83
Diluted - net income	$	1.56	$	2.20	$	1.33	$	1.32	$	1.62	$	2.56	$	1.54	$	0.83

Leases (Notes)

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Lessee, Operating Leases [Text Block]

19: LEASES

ASU 2016-02, Leases (Topic 842) and its related amendments (collectively, the New Lease Accounting Standard) are effective for reporting periods beginning after December 15, 2018. We adopted the New Lease Accounting Standard effective January 1, 2019 and elected the modified retrospective approach in which results for periods before 2019 were not adjusted for the new standard and the cumulative effect of the change in accounting was recognized through retained earnings at the date of adoption.

We have elected certain of the practical expedients available under the New Lease Accounting Standard. We have applied the practical expedient which allows prospective transition to the New Lease Accounting Standard on January 1, 2019. Under the transition practical expedient, we did not reassess lease classification, embedded leases or initial direct costs. We have applied the practical expedient for short-term leases. We have lease agreements with lease and non-lease components. We have elected the practical expedients to combine these components for certain equipment leases. Additionally, for certain equipment leases, we apply a portfolio approach to effectively account for the operating lease right-of-use assets and liabilities. The adoption of the New Lease Accounting Standard did not have a material effect on our Consolidated Statement of Operations or Consolidated Statement of Cash Flows. Upon adoption, we recorded a $2.6 billion right-of-use asset and a $2.7 billion lease liability. The adoption of the New Lease Accounting Standard had an immaterial impact on retained earnings.

Operating lease expense for the year ended December 31, 2019 was approximately $720 million.

Supplemental cash flow information related to operating leases was as follows:


(dollars in millions)	Year ended December 31, 2019
Operating cash flows used in the measurement of operating lease liabilities	$	746


Operating lease right-of-use assets obtained in exchange for operating lease obligations	416

Operating lease right-of-use assets and liabilities are reflected on our Consolidated Balance Sheet as follows:


(dollars in millions, except lease term and discount rate)	December 31, 2019
Operating lease right-of-use assets	$	2,599

Accrued liabilities	$	(544)
Operating lease liabilities	(2,144)
Total operating lease liabilities	$	(2,688)

Supplemental balance sheet information related to operating leases was as follows:


	December 31, 2019
Weighted Average Remaining Lease Term (in years)	7.9

Weighted Average Discount Rate	3.5	%

Undiscounted maturities of operating lease liabilities as of December 31, 2019 are as follows:


(dollars in millions)
2020	$	641
2021	542
2022	410
2023	306
2024	234
Thereafter	1,014
Total undiscounted lease payments	3,147
Less imputed interest	(459)
Total discounted lease payments	$	2,688

Prior to the adoption of the New Lease Accounting Standard, rental commitments on an undiscounted basis were approximately $2.9 billion at December 31, 2018 under long-term non-cancelable operating leases and were payable as follows: $683 million in 2019, $544 million in 2020, $407 million in 2021, $301 million in 2022, $235 million in 2023 and $746 million thereafter.

Summary of Accounting Principles (Policy)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Consolidation Policy [Text Block]

Consolidation. The Consolidated Financial Statements include the accounts of United Technologies Corporation (UTC) and its controlled subsidiaries. Intercompany transactions have been eliminated.

Cash And Cash Equivalents Policy [Text Block]

Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy

Accounts Receivable Policy [Text Block]

Accounts Receivable. Accounts receivable are stated at their net estimated realized value. The allowance for doubtful accounts is based upon an assessment of customer creditworthiness, historical payment experience, and the age and status of outstanding receivables. Current and long-term accounts receivable as of December 31, 2019 includes retainage of $111 million and unbilled receivables of $522 million, which primarily includes unbilled receivables with commercial aerospace customers. Current and long-term accounts receivable as of December 31, 2018 include retainage of $116 million and unbilled receivables of $678 million, which primarily includes unbilled receivables with commercial aerospace customers. See Note 4 for discussion of commercial aerospace industry assets and commitments. Retainage represents amounts that, pursuant to the applicable contract, are not due until project completion and acceptance by the customer. Unbilled receivables represent revenues that are not currently billable to the customer under the terms of the contract. These items are expected to be billed and collected in the normal course of business.

Contract with Customer, Assets and Liabilities [Policy Text Block]

Contract Assets and Liabilities. Contract assets and liabilities represent the difference in the timing of revenue recognition from receipt of cash from our customers. Contract assets reflect revenue recognized and performance obligations satisfied in advance of customer billing. Performance obligations partially satisfied in advance of customer billings are included in contract assets.Contract liabilities relate to payments received in advance of the satisfaction of performance under the contract. We receive payments from customers based on the terms established in our contracts. See Note 6 for further discussion of contract assets and liabilities.

Inventories and Contracts in Progress Policy Text Block

Inventory. Inventory is stated at the lower of cost or estimated realizable value and are primarily based on first-in, first-out (FIFO) or average cost methods; however, certain Collins Aerospace Systems and Carrier entities use the last-in, first-out (LIFO) method. If inventories that were valued using the LIFO method had been valued under the FIFO method, they would have been higher by $126 million and $119 million at December 31, 2019 and 2018, respectively.Valuation reserves for excess, obsolete, and slow-moving inventory are estimated by comparing the inventory levels of individual parts to both future sales forecasts or production requirements and historical usage rates in order to identify inventory where the resale value or replacement value is less than inventoriable cost. Other factors that management considers in determining the adequacy of these reserves include whether individual inventory parts meet current specifications and cannot be substituted for a part currently being sold or used as a service part, overall market conditions, and other inventory management initiatives. Manufacturing costs are allocated to current production and firm contracts.

Equity Method Investments Policy [Policy Text Block]

Goodwill And Intangible Assets Policy [Text Block]


Collaboration assets			30 years
Customer relationships and related programs			1 to 32 years
Purchased service contracts			5 to 25 years
Patents & trademarks			4 to 40 years
Exclusivity assets			5 to 25 years

Lessee, Leases

Other Long Lived Assets Policy [Text Block]

Long-Term Financing Receivables Policy [Text Block]


(dollars in millions)	2019		2018
Long-term trade accounts receivable	$	251	$	269
Notes and leases receivable	265		258
Total long-term receivables	$	516	$	527

Income Tax Policy [Text Block]

Revenue Recognition Policy

Timing of the satisfaction of performance obligations varies across our businesses due to our diverse product and service mix, customer base, and contractual terms.

control to the customer. Contract costs include labor, materials, and subcontractors' costs, or other direct costs, and where applicable on government and commercial contracts, indirect costs.

of the FASB ASC are not presumed to be representative of fair value for determining the amounts to allocate to each element of an arrangement.

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

Research and Development Policy [Text Block]

Foreign Currency Transactions And Translations Policy [Text Block]

Derivatives and Hedging Activity Policy [Text Block]

Environmental Costs Policy

Pension and Postretirement Obligations Policy

Business Acquisitions, Dispositions, Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]

Schedule of Goodwill [Table Text Block]


(dollars in millions)	Balance as of January 1, 2019		Goodwill resulting from business combinations		Foreign currency translation and other		Balance as of December 31, 2019
Otis	$	1,688	$	16	$	(57)	$	1,647
Carrier	9,835		1		(29)		9,807
Pratt & Whitney	1,567		—		(4)		1,563
Collins Aerospace Systems	35,001		75		(51)		35,025
Total Segments	48,091		92		(141)		48,042
Eliminations and other	21		—		—		21
Total	$	48,112	$	92	$	(141)	$	48,063

Intangible Assets Disclosure [Table Text Block]


	2019						2018
(dollars in millions)	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Amortized:
Service portfolios	$	2,105	$	(1,626)	$	2,164	$	(1,608)
Patents and trademarks	356		(250)		361		(236)
Collaboration intangible assets	4,862		(920)		4,509		(649)
Customer relationships and other	23,210		(5,607)		22,525		(4,560)
	30,533		(8,403)		29,559		(7,053)
Unamortized:
Trademarks and other	3,916		—		3,918		—
Total	$	34,449	$	(8,403)	$	33,477	$	(7,053)

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]


(dollars in millions)	2020	2021	2022	2023	2024
Amortization expense	$1,438	$1,420	$1,420	$1,411	$1,381

Business Acquisitions, Dispositions, Goodwill and Intangible Assets Dispositions (Tables) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
After tax gain on the sale of Taylor Company		$ 591
Gain on sale of Taylor Company	$ 0	799	$ 0
Assets held for sale		175
Liabilities held for sale	0	40
Inventory, net	10,950	10,083
Property, Plant and Equipment, Net	$ 12,755	12,297
Property, Plant and Equipment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale		37
Inventories [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale		$ 51

Business Acquisitions, Dispositions, Goodwill and Intangible Assets Pro Forma Financial Data (Tables) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 19,551,000,000	$ 19,496,000,000	$ 19,634,000,000	$ 18,365,000,000	$ 18,044,000,000	$ 16,510,000,000	$ 16,705,000,000	$ 15,242,000,000	$ 77,046,000,000	$ 66,501,000,000	$ 59,837,000,000
Operating Income (Loss)									8,966,000,000	8,553,000,000	8,138,000,000
Rockwell Collins [Member]
Revenues									$ 778,000,000	778,000,000
Operating Income (Loss)										11,000,000
Business Acquisition, Pro Forma Revenue										74,136,000,000	68,033,000,000
Business Acquisition, Pro Forma Net Income (Loss)										6,064,000,000	4,662,000,000
Pro Forma Nonrecurring Adjustment, Amortization of inventory and fixed asset fair value adjustment										58,000,000	(192,000,000)
Pro Forma Nonrecurring Adjustment, Amortization of acquired Rockwell Collins intangible assets, net										(193,000,000)	(202,000,000)
Pro Forma Nonrecurring Adjustment, Utilization of contractual customer obligation										16,000,000	116,000,000
Pro Forma Nonrecurring Adjustment, UTC/Rockwell fees for advisory, legal, accounting services										212,000,000	(212,000,000)
Pro Forma Nonrecurring Adjustment, Interest expense incurred on acquisition financing, net										(199,000,000)	(234,000,000)
Pro Forma Nonrecurring Adjustment, Elimination of capitalized pre-production engineering amortization										63,000,000	42,000,000
Pro Forma Nonrecurring Adjustment, Adjustment to net periodic pension cost										42,000,000	34,000,000
Pro Forma Nonrecurring Adjustment, Adjustment to reflect the adoption of ASC 606										106,000,000	0
Pro Forma Nonrecurring Adjustment, Elimination of entities held for sale										(47,000,000)	(35,000,000)
Pro Forma Nonrecurring Adjustments, Net										$ 58,000,000	$ (734,000,000)

Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]


(dollars in millions, except per share amounts; shares in millions)	2019		2018		2017



Net income attributable to common shareowners	$	5,537	$	5,269	$	4,552
Basic weighted average number of shares outstanding	854.8		800.4		790.0
Stock awards and equity units (share equivalent)	9.1		9.7		9.1
Diluted weighted average number of shares outstanding	863.9		810.1		799.1
Earnings Per Share of Common Stock:
Basic	$	6.48	$	6.58	$	5.76



Diluted	$	6.41	$	6.50	$	5.70

Commercial Aerospace Industry Assets and Commitments (Tables)

12 Months Ended

Dec. 31, 2019

Other Commitments [Abstract]

Commercial Aerospace Industry Assets and Commitments [Table Text Block]

The following is the expected maturity of commercial aerospace industry assets and commitments as of December 31, 2019:


(dollars in millions)	Committed		2020		2021		2022		2023		2024		Thereafter
Notes and leases receivable	$	308	$	30	$	23	$	14	$	22	$	38	$	181
Commercial aerospace financing commitments	$	3,937	$	911	$	1,119	$	974	$	819	$	44	$	70
Other commercial aerospace commitments	11,055		702		736		717		668		627		7,605
Collaboration partners' share	(5,284)		(508)		(623)		(571)		(538)		(193)		(2,851)

Total commercial commitments	$	9,708	$	1,105	$	1,232	$	1,120	$	949	$	478	$	4,824

Inventory, Net (Tables)

12 Months Ended

Dec. 31, 2019

Inventory Disclosure [Abstract]

Inventory Table [Table Text Block]


(dollars in millions)	2019		2018
Raw materials	$	3,357	$	3,052
Work-in-process	2,726		2,673
Finished goods	4,867		4,358
	$	10,950	$	10,083

Contract Asset & Liability (Tables)

12 Months Ended

Dec. 31, 2019

Contract with Customer, Asset and Liability [Abstract]

Contract with Customer, Asset and Liability [Table Text Block]

from customers based on the terms established in our contracts. Total contract assets and contract liabilities as of December 31, 2019 and 2018 are as follows:


(dollars in millions)	December 31, 2019		December 31, 2018
Contract assets, current	$	4,184	$	3,486
Contract assets, noncurrent (included within Other assets)	1,338		1,142
Total contract assets	5,522		4,628
Contract liabilities, current	(6,180)		(5,720)
Contract liabilities, noncurrent	(5,732)		(5,069)
Total contract liabilities	(11,912)		(10,789)
Net contract liabilities	$	(6,390)	$	(6,161)

Fixed Assets (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Fixed Assets [Text Block]


(dollars in millions)	Estimated Useful Lives	2019		2018
Land		$	447	$	425
Buildings and improvements	12-40 years	6,673		6,486
Machinery, tools and equipment	3-20 years	16,353		15,119
Other, including assets under construction		2,213		2,054
		25,686		24,084
Accumulated depreciation		(12,931)		(11,787)
		$	12,755	$	12,297

Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2019

Accrued Liabilities [Abstract]

Schedule of Accrued Liabilities Table [Text Block]


(dollars in millions)	2019		2018
Accrued salaries, wages and employee benefits	$	2,407	$	2,074
Service and warranty accruals	734		754
Interest payable	608		637
Litigation and contract matters	502		461
Income taxes payable	928		460
Accrued property, sales and use taxes	320		277
Canadian government settlement - current portion	—		34
Accrued restructuring costs	208		249
Accrued workers compensation	157		142
Liabilities held for sale	—		40
Operating lease liabilities, current	544		—
Other	5,329		5,095
	$	11,737	$	10,223

Borrowings and Lines of Credit (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Short-term Debt [Table Text Block]


(dollars in millions)	2019		2018
Short-term borrowings:
Commercial paper	$	—	$	1,257
Other borrowings	2,364		212
Total short-term borrowings	$	2,364	$	1,469

Schedule of Weighted average interest rates [Table Text Block]

The weighted-average interest expense rates applicable to short-term borrowings and total debt were as follows:


	2019		2018
Average interest expense rate - average outstanding borrowings during the year:
Short-term borrowings	1.9	%	1.5	%
Total debt	3.7	%	3.5	%

Average interest expense rate - outstanding borrowings as of December 31:
Short-term borrowings	3.1	%	1.2	%
Total debt	3.7	%	3.5	%

Schedule of Debt Issuances and Repayments [Table Text Block]

We had no debt issuances during 2019 and the following issuances of debt in 2018:

(dollars in millions)


Issuance Date	Description of Notes	Aggregate Principal Balance
August 16, 2018:	3.350% notes due 2021¹	$	1,000
	3.650% notes due 2023¹	2,250
	3.950% notes due 2025¹	1,500
	4.125% notes due 2028¹	3,000
	4.450% notes due 2038¹	750
	4.625% notes due 2048²	1,750
	LIBOR plus 0.65% floating rate notes due 2021¹	750

May 18, 2018:	1.150% notes due 2024³	€	750
	2.150% notes due 2030³	500
	EURIBOR plus 0.20% floating rate notes due 2020³	750

1 The net proceeds received from these debt issuances were used to partially finance the cash consideration portion of the purchase price for Rockwell Collins and fees, expenses and other amounts related to the acquisition of Rockwell Collins.

2 The net proceeds from these debt issuances were used to fund the repayment of commercial paper and for other general corporate purposes.

3 The net proceeds received from these debt issuances were used for general corporate purposes.

We made the following repayments of debt in 2019 and 2018:

(dollars in millions)


Repayment Date	Description of Notes	Aggregate Principal Balance
November 15, 2019	8.875% notes	$	271

November 13, 2019	EURIBOR plus 0.15% floating rate notes	€	750

November 1, 2019:	LIBOR plus 0.350% floating rate notes	$	350
	1.500% notes	$	650

July 15, 2019:	1.950% notes¹	$	300
	5.250% notes¹	$	300

December 14, 2018	Variable-rate term loan due 2020 (1 month LIBOR plus 1.25%)¹	$	482

May 4, 2018	1.778% junior subordinated notes	$	1,100

February 22, 2018	EURIBOR plus 0.80% floating rate notes	€	750

February 1, 2018	6.80% notes	$	99

1 These notes and term loan were assumed in connection with the Rockwell Collins acquisition and subsequently repaid.

Schedule of Principal Payments on Long-term Debt [Table Text Block]


(dollars in millions)
2020	$	3,496
2021	4,142
2022	3,919
2023	3,501
2024	2,592
Thereafter	23,949
Total	$	41,599

Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2019

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule Of Multiemployer Plans Table [Text Block]


(dollars in millions)		Pension Protection Act Zone Status			FIP/ RP Status		Contributions
Pension Fund	EIN/Pension Plan Number	2019	2018	Pending/ Implemented	2019		2018		2017		Surcharge Imposed	Expiration Date of Collective-Bargaining Agreement
National Elevator Industry Pension Plan	23-2694291	Green	Green	No	$	127	$	120	$	114	No	July 8, 2022
Other funds					32		31		31
					$	159	$	151	$	145

Share-based Payment Arrangement, Cost by Plan [Table Text Block]


(dollars in millions)	2019		2018		2017

Total compensation cost recognized	$	356	$	251	$	192

Schedule of Stock Options Roll Forward [Table Text Block]

A summary of the transactions under all long-term incentive plans for the year ended December 31, 2019 follows:


	Stock Options				Stock Appreciation Rights					Performance Share Units	Other Incentive Shares/Units
(shares and units in thousands)	Shares	Average Price*		Shares	Average Price*		Units	Average Price*
Outstanding at:
December 31, 2018	1,603	$	99.89	32,066	$	99.95	1,806	$	110.41	3,047
Granted	339	124.72		8,081	123.54		839	121.22		1,223
Ancillary**	—	—		—	—		101	95.28		—
Exercised / earned	(317)	88.61		(6,843)	84.44		(758)	95.28		(816)
Cancelled	(57)	121.69		(591)	122.76		(69)	118.21		(135)

December 31, 2019	1,568	$	106.75	32,713	$	108.61	1,919	$	120.04	3,319

* weighted-average grant / exercise price

** ancillary shares earned based on actual performance achieved on the 2016 award

Disclosure Of Share Based Compensation Arrangements By Share Based Payment Award Text Block

The following table summarizes information about equity awards outstanding that are vested and expected to vest as well as equity awards outstanding that are exercisable at December 31, 2019:


	Equity Awards Vested and Expected to Vest											Equity Awards That Are Exercisable
(shares in thousands; aggregate intrinsic value in millions)	Awards	Average Price*		Aggregate Intrinsic Value		Remaining Term**	Awards	Average Price*		Aggregate Intrinsic Value		Remaining Term**
Stock Options/Stock Appreciation Rights	33,769	$	107.58	$	1,424	5.9 years	19,285	$	96.56	$	1,026	4.0 years
Performance Share Units/Restricted Stock	5,514	—		826		2.1 years

* weighted-average exercise price per share

** weighted-average contractual remaining term in years

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The following table indicates the assumptions used in estimating fair value for the years ended December 31, 2019, 2018 and 2017. Lattice-based option models incorporate ranges of assumptions for inputs; those ranges are as follows:


	2019		2018		2017
Expected volatility	18.8% - 19.7%		17.5% - 21.1%		19	%
Weighted-average volatility	20	%	18	%	19	%
Expected term (in years)	6.5 - 6.6		6.5 - 6.6		6.5
Expected dividend yield	2.4	%	2.2	%	2.4	%
Risk-free rate	2.3% - 2.7%		1.3% - 2.7%		0.5% - 2.5%

Pension Plan [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Defined Benefit Plans Disclosures [Text Block]


(dollars in millions)	2019		2018
Change in Benefit Obligation:
Beginning balance	$	37,795	$	36,999
Service cost	359		372
Interest cost	1,340		1,117
Actuarial loss (gain)	4,651		(2,048)
Total benefits paid	(2,174)		(1,932)
Net settlement, curtailment and special termination benefits	(267)		(38)
Plan amendments	6		65
Business combinations	(6)		3,694
Other	127		(434)
Ending balance	$	41,831	$	37,795

Change in Plan Assets:
Beginning balance	$	35,253	$	35,689
Actual return on plan assets	6,311		(1,667)
Employer contributions	207		238
Benefits paid	(2,174)		(1,932)
Settlements	(54)		(38)
Business combinations	(10)		3,355
Other	156		(392)
Ending balance	$	39,689	$	35,253

Funded Status:
Fair value of plan assets	$	39,689	$	35,253
Benefit obligations	(41,831)		(37,795)
Funded status of plan	$	(2,142)	$	(2,542)

Amounts Recognized in the Consolidated Balance Sheet Consist of:
Noncurrent assets	$	617	$	686
Current liability	(88)		(88)
Noncurrent liability	(2,671)		(3,140)
Net amount recognized	$	(2,142)	$	(2,542)

Amounts Recognized in Accumulated Other Comprehensive Loss Consist of:
Net actuarial loss	$	8,910	$	8,606
Prior service cost	203		139
Net amount recognized	$	9,113	$	8,745

Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Table Text Block]

Information for pension plans with accumulated benefit obligations in excess of plan assets:


(dollars in millions)	2019		2018
Projected benefit obligation	$	39,267	$	25,884
Accumulated benefit obligation	38,816		25,455
Fair value of plan assets	36,530		22,803

Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets [Table Text Block]

Information for pension plans with projected benefit obligations in excess of plan assets:


(dollars in millions)	2019		2018
Projected benefit obligation	$	39,680	$	28,591
Accumulated benefit obligation	39,178		27,968
Fair value of plan assets	36,921		25,362

Schedule of Net Benefit Costs [Table Text Block]

The components of the net periodic pension benefit are as follows:


(dollars in millions)	2019		2018		2017
Pension Benefits:
Service cost	$	359	$	372	$	374
Interest cost	1,340		1,117		1,120
Expected return on plan assets	(2,430)		(2,255)		(2,215)
Amortization of prior service cost (credit)	17		(41)		(36)

Recognized actuarial net loss	265		401		575
Net settlement, curtailment and special termination benefits (gain) loss	(54)		1		3
Net periodic pension benefit - employer	$	(503)	$	(405)	$	(179)

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

Other changes in plan assets and benefit obligations recognized in other comprehensive loss in 2019 are as follows:


(dollars in millions)
Current year actuarial loss	$	553
Amortization of actuarial loss	(265)
Current year prior service cost	6
Amortization of prior service cost	(17)
Net settlement and curtailment	57
Other	34
Total recognized in other comprehensive loss	$	368
Net recognized in net periodic pension benefit and other comprehensive loss	$	(135)

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]

The estimated amount that will be amortized from accumulated other comprehensive loss into net periodic pension (benefit) cost in 2020 is as follows:


(dollars in millions)
Net actuarial loss	$	371
Prior service cost	51
	$	422

Defined Benefit Plan, Assumptions [Table Text Block]

Major assumptions used in determining the benefit obligation and net cost for pension plans are presented in the following table as weighted-averages:


	Benefit Obligation						Net Cost
	2019		2018		2019		2018		2017
Discount rate
PBO	3.0	%	4.0	%	3.9	%	3.4	%	3.8	%
Interest cost¹	—		—		3.6	%	3.0	%	3.3	%
Service cost¹	—		—		3.6	%	3.3	%	3.6	%
Salary scale	4.2	%	4.2	%	4.2	%	4.2	%	4.1	%
Expected return on plan assets	—		—		6.7	%	6.8	%	7.3	%

Schedule of Allocation of Plan Assets [Table Text Block]

The fair values of pension plan assets at December 31, 2019 and 2018 by asset category are as follows:


(dollars in millions)	Quoted Prices in Active Markets For Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Not Subject to Leveling		Total
Asset Category:
Public Equities
Global Equities	$	3,588	$	5	$	—	$	—	$	3,593
Global Equity Commingled Funds¹	—		1,734		—		—		1,734
Enhanced Global Equities²	322		393		—		—		715
Global Equity Funds at net asset value⁸	—		—		—		6,318		6,318
Private Equities^3,8	—		—		202		1,230		1,432
Fixed Income Securities
Governments	969		116		—		—		1,085
Corporate Bonds	1		13,059		5		—		13,065
Structured Products	—		17		—		—		17
Fixed Income Securities⁸	—		—		—		6,262		6,262
Real Estate^4,8	—		13		1,464		372		1,849
Other^5,8	—		343		—		2,834		3,177
Cash & Cash Equivalents^6,8	—		47		—		76		123
Subtotal	$	4,880	$	15,727	$	1,671	$	17,092	39,370
Other Assets & Liabilities⁷									319
Total at December 31, 2019									$	39,689
Public Equities
Global Equities	$	2,917	$	4	$	—	$	—	$	2,921
Global Equity Commingled Funds¹	185		426		—		—		611
Enhanced Global Equities²	79		605		—		—		684
Global Equity Funds at net asset value ⁸	—		—		—		7,386		7,386
Private Equities^3,8	—		—		133		1,194		1,327
Fixed Income Securities
Governments	1,789		162		—		—		1,951
Corporate Bonds	—		11,527		18		29		11,574

Fixed Income Securities⁸	—		—		—		3,599		3,599
Real Estate^4,8	—		13		1,387		429		1,829
Other^5,8	—		262		—		2,368		2,630
Cash & Cash Equivalents^6,8	—		220		—		138		358
Subtotal	$	4,970	$	13,219	$	1,538	$	15,143	34,870
Other Assets & Liabilities⁷									383
Total at December 31, 2018									$	35,253

Note 1 Represents commingled funds that invest primarily in common stocks.

Note 3 Represents limited partner investments with general partners that primarily invest in debt and equity.

Note 4 Represents investments in real estate including commingled funds and directly held properties.

Note 5 Represents insurance contracts and global balanced risk commingled funds consisting mainly of equity, bonds and some commodities.

Note 6 Represents short-term commercial paper, bonds and other cash or cash-like instruments.

Note 7 Represents trust receivables and payables that are not leveled.

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]

The fair value measurement of plan assets using significant unobservable inputs (Level 3) changed due to the following:


(dollars in millions)	Private Equities		Corporate Bonds		Real Estate		Total
Balance, December 31, 2017	$	46	$	—	$	1,446	$	1,492
Plan assets acquired	—		33		—		33
Realized (losses) gains	—		(1)		10		9
Unrealized gains relating to instruments still held in the reporting period	—		2		38		40
Purchases, sales, and settlements, net	87		(16)		(107)		(36)
Balance, December 31, 2018	133		18		1,387		1,538

Realized losses	—		—		(2)		(2)
Unrealized gains relating to instruments still held in the reporting period	32		—		27		59
Purchases, sales, and settlements, net	37		(13)		52		76
Balance, December 31, 2019	$	202	$	5	$	1,464	$	1,671

Other Postretirement Benefits Plan [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Defined Benefit Plans Disclosures [Text Block]


(dollars in millions)	2019		2018
Change in Benefit Obligation:
Beginning balance	$	810	$	767
Service cost	2		2
Interest cost	31		26
Actuarial gain	(11)		(52)
Total benefits paid	(69)		(70)
Business combinations	—		186
Plan amendments	—		(43)
Other	2		(6)
Ending balance	$	765	$	810

Change in Plan Assets:
Beginning balance	$	20	$	—

Employer contributions	69		69
Benefits paid	(69)		(70)
Business combinations	—		20
Other	—		1
Ending balance	$	20	$	20

Funded Status:
Fair value of plan assets	$	20	$	20
Benefit obligations	(765)		(810)
Funded status of plan	$	(745)	$	(790)

Amounts Recognized in the Consolidated Balance Sheet Consist of:
Current liability	$	(47)	$	(61)
Noncurrent liability	(698)		(729)
Net amount recognized	$	(745)	$	(790)

Amounts Recognized in Accumulated Other Comprehensive Loss Consist of:
Net actuarial gain	$	(181)	$	(184)
Prior service credit	(4)		(47)
Net amount recognized	$	(185)	$	(231)

Schedule of Net Benefit Costs [Table Text Block]

The components of net periodic benefit cost are as follows:


(dollars in millions)	2019		2018		2017
Other Postretirement Benefits:
Service cost	$	2	$	2	$	2
Interest cost	31		26		29
Expected return on plan assets	(1)		—		—
Amortization of prior service credit	(42)		(6)		(1)
Recognized actuarial net gain	(12)		(10)		(9)

Net periodic other postretirement (benefit) cost	$	(22)	$	12	$	21

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

Other changes in plan assets and benefit obligations recognized in other comprehensive loss in 2019 are as follows:


(dollars in millions)
Current year actuarial gain	$	(10)

Amortization of prior service credit	42
Amortization of actuarial net gain	12
Other	2
Total recognized in other comprehensive loss	$	46
Net recognized in net periodic other postretirement benefit cost and other comprehensive loss	$	24

Defined Benefit Plan, Assumptions [Table Text Block]

Major assumptions used in determining the benefit obligation and net cost for postretirement plans are presented in the following table as weighted-averages:


	Benefit Obligation						Net Cost
	2019		2018		2019		2018		2017
Discount rate	3.0	%	4.1	%	4.0	%	3.4	%	3.8	%
Expected return on assets	—		—		7.0	%	7.0	%	N/A

Schedule of Health Care Cost Trend Rates [Table Text Block]

Assumed health care cost trend rates are as follows:


	2019		2018
Health care cost trend rate assumed for next year	6.5	%	7.0	%
Rate that the cost trend rate gradually declines to	5.0	%	5.0	%
Year that the rate reaches the rate it is assumed to remain at	2026		2026

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]

A one-percentage-point change in assumed health care cost trend rates would have the following effects:


	2019 One-Percentage-Point
(dollars in millions)	Increase		Decrease
Effect on total service and interest cost	$	1	$	(1)
Effect on postretirement benefit obligation	25		(22)

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Notes to Consolidated Financial Statements [Abstract]

Schedule of Income before Income Tax Domestic and Foreign [Table Text Block]

The sources of income from continuing operations before income taxes are:


(dollars in millions)	2019		2018		2017
United States	$	3,207	$	3,630	$	2,990
Foreign	5,036		4,650		4,773
	$	8,243	$	8,280	$	7,763

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The income tax expense (benefit) for the years ended December 31, 2019, 2018 and 2017 consisted of the following components:


(dollars in millions)	2019		2018		2017
Current:
United States:
Federal	$	188	$	442	$	1,577
State	48		211		64
Foreign	2,024		1,238		1,140
	2,260		1,891		2,781
Future:
United States:
Federal	111		57		(27)
State	52		62		84
Foreign	(128)		616		5
	35		735		62
Income tax expense	$	2,295	$	2,626	$	2,843
Attributable to items credited (charged) to equity	$	40	$	501	$	(128)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

Differences between effective income tax rates and the statutory U.S. federal income tax rate are as follows:


	2019		2018		2017
Statutory U.S. federal income tax rate	21.0	%	21.0	%	35.0	%
Tax related separation activities	8.8	%	—	%	—	%
Tax on international activities	1.9	%	0.9	%	(6.4)	%
Tax audit settlements	(3.5)	%	—	%	(0.7)	%
U.S. tax reform	—	%	9.0	%	8.9	%
Other	(0.4)	%	0.8	%	(0.2)	%
Effective income tax rate	27.8	%	31.7	%	36.6	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

The tax effects of temporary differences and tax carryforwards which gave rise to future income tax benefits and payables at December 31, 2019 and 2018 are as follows:


(dollars in millions)	2019		2018
Future income tax benefits:
Insurance and employee benefits	$	1,205	$	1,154
Other asset basis differences	829		1,013
Other liability basis differences	2,153		1,482
Tax loss carryforwards	622		583
Tax credit carryforwards	1,021		1,050
Valuation allowances	(616)		(605)
	$	5,214	$	4,677
Future income taxes payable:
Intangible assets	$	4,293	$	4,462
Other asset basis differences	2,904		2,159
Other items, net	143		123
	$	7,340	$	6,744

Summary Of Tax Credit Carryforwards [Table Text Block]

At December 31, 2019, tax credit carryforwards, principally state and foreign, and tax loss carryforwards, principally state and foreign, were as follows:


(dollars in millions)	Tax Credit Carryforwards		Tax Loss Carryforwards
Expiration period:
2020-2024	$	59	$	393
2025-2029	27		179
2030-2039	336		394
Indefinite	599		2,218
Total	$	1,021	$	3,184

Summary Of Income Tax Contingencies [Table Text Block]

A reconciliation of the beginning and ending amounts

of unrecognized tax benefits and interest expense related to unrecognized tax benefits for the years ended December 31, 2019, 2018 and 2017 is as follows:


(dollars in millions)	2019		2018		2017
Balance at January 1	$	1,619	$	1,189	$	1,086
Additions for tax positions related to the current year	131		192		192
Additions for tax positions of prior years	73		344		73
Reductions for tax positions of prior years	(101)		(91)		(91)
Settlements	(375)		(15)		(71)
Balance at December 31	$	1,347	$	1,619	$	1,189
Gross interest expense related to unrecognized tax benefits	$	57	$	37	$	34
Total accrued interest balance at December 31	$	249	$	255	$	215

Restructuring and Other Costs (Tables)

12 Months Ended

Dec. 31, 2019

Restructuring Cost and Reserve [Line Items]

Schedule of Restructuring and Related Costs [Table Text Block]

We recorded charges in the segments as follows:


(dollars in millions)
Otis	$	54
Carrier	126
Pratt & Whitney	133
Collins Aerospace Systems	106
Eliminations and other	6


Total	$	425

Restructuring charges incurred in 2019 primarily relate to actions initiated during 2019 and 2018, and were recorded as follows:


(dollars in millions)
Cost of sales	$	231
Selling, general & administrative	190
Non-service pension (benefit)	4


Total	$	425

Current Year Actions [Member]

Restructuring Cost and Reserve [Line Items]

Schedule of Restructuring Reserve by Type of Cost [Table Text Block]

The following table summarizes the accrual balances and utilization by cost type for the 2019 restructuring actions:


(dollars in millions)	Severance		Facility Exit & Other Costs		Total
Net pre-tax restructuring costs	$	298	$	23	$	321
Utilization, foreign exchange and other costs	(193)		(10)		(203)
Balance at December 31, 2019	$	105	$	13	$	118

Schedule of Restructuring and Related Costs [Table Text Block]

The following table summarizes expected, incurred and remaining costs for the 2019 restructuring actions by segment:


(dollars in millions)	Expected Costs		Cost Incurred During 2019		Remaining Costs at December 31, 2019
Otis	$	65	$	(45)	$	20
Carrier	120		(110)		10
Pratt & Whitney	133		(133)		—
Collins Aerospace Systems	120		(27)		93
Eliminations and other	6		(6)		—

Total	$	444	$	(321)	$	123

Prior Year Actions [Member]

Restructuring Cost and Reserve [Line Items]

Schedule of Restructuring Reserve by Type of Cost [Table Text Block]

The following table summarizes the accrual balances and utilization by cost type for the 2018 restructuring actions:


(dollars in millions)	Severance		Facility Exit & Other Costs		Total
Restructuring accruals at January 1, 2019	$	115	$	23	$	138
Net pre-tax restructuring costs	38		8		46
Utilization, foreign exchange and other costs	(132)		(29)		(161)
Balance at December 31, 2019	$	21	$	2	$	23

Schedule of Restructuring and Related Costs [Table Text Block]

The following table summarizes expected, incurred and remaining costs for the 2018 programs by segment:


(dollars in millions)	Expected Costs		Costs Incurred During 2018		Costs Incurred During 2019		Remaining Costs at December 31, 2019
Otis	$	57	$	(48)	$	(7)	$	2
Carrier	80		(64)		(16)		—
Pratt & Whitney	3		(3)		—		—
Collins Aerospace Systems	111		(87)		(23)		1
Eliminations and other	7		(5)		—		2

Total	$	258	$	(207)	$	(46)	$	5

Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2019

Derivative Instruments, Gain (Loss) [Line Items]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

The following table summarizes the fair value and presentation in the Consolidated Balance Sheets for derivative instruments as of December 31, 2019 and 2018:


(dollars in millions)	Balance Sheet Location	December 31, 2019		December 31, 2018
Derivatives designated as hedging instruments:
Foreign exchange contracts	Asset Derivatives:
	Other assets, current	$	11	$	10
	Other assets	13		12
	Total asset derivatives	$	24	$	22
	Liability Derivatives:
	Accrued liabilities	(72)		(83)
	Other long-term liabilities	(98)		(111)
	Total liability derivatives	$	(170)	$	(194)
Derivatives not designated as hedging instruments:
Foreign exchange contracts	Asset Derivatives:
	Other assets, current	27		44
	Other assets	5		19
	Total asset derivatives	$	32	$	63
	Liability Derivatives:
	Accrued liabilities	(116)		(89)
	Other long-term liabilities	(1)		(3)
	Total liability derivatives	$	(117)	$	(92)

Reclassification out of Accumulated Other Comprehensive Income [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) [Table Text Block]


	Year Ended December 31,
(dollars in millions)	2019		2018
Loss recorded in Accumulated other comprehensive loss	$	(33)	$	(307)
Loss (Gain) reclassified from Accumulated other comprehensive loss into Product sales	$	51	$	(16)

Other Income (Expense) [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) [Table Text Block]


	Year Ended December 31,
(dollars in millions)	2019		2018
Foreign exchange contracts	$	46	$	115

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

tables provide the valuation hierarchy classification of assets and liabilities that are carried at fair value and measured on a recurring and nonrecurring basis in our Consolidated Balance Sheet as of December 31, 2019 and 2018:


	December 31, 2019
(dollars in millions)	Total		Level 1		Level 2		Level 3
Recurring fair value measurements:
Available-for-sale securities	$	57	$	57	$	—	$	—
Derivative assets	56		—		56		—
Derivative liabilities	(287)		—		(287)		—


	December 31, 2018
(dollars in millions)	Total		Level 1		Level 2		Level 3
Recurring fair value measurements:
Available-for-sale securities	$	51	$	51	$	—	$	—
Derivative assets	85		—		85		—
Derivative liabilities	(286)		—		(286)		—

Fair Value, by Balance Sheet Grouping [Table Text Block]

The following table provides carrying amounts and fair values of financial instruments that are not carried at fair value in our Consolidated Balance Sheet at December 31, 2019 and 2018:


	December 31, 2019						December 31, 2018
(dollars in millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Long-term receivables	$	344	$	347	$	334	$	314
Customer financing notes receivable	283		283		272		265
Short-term borrowings	(2,364)		(2,364)		(1,469)		(1,469)
Long-term debt (excluding finance leases)	(41,199)		(46,202)		(43,996)		(44,003)
Long-term liabilities	(336)		(322)		(508)		(467)

The following table provides the valuation hierarchy classification of assets and liabilities that are not carried at fair value in our Consolidated Balance Sheet as of December 31, 2019 and 2018:


	December 31, 2019
(dollars in millions)	Total		Level 1		Level 2		Level 3
Long-term receivables	$	347	$	—	$	347	$	—
Customer financing notes receivable	283		—		283		—
Short-term borrowings	(2,364)		—		—		(2,364)
Long-term debt (excluding finance leases)	(46,202)		—		(45,802)		(400)
Long-term liabilities	(322)		—		(322)		—


	December 31, 2018
(dollars in millions)	Total		Level 1		Level 2		Level 3
Long-term receivables	$	314	$	—	$	314	$	—
Customer financing notes receivable	265		—		265		—
Short-term borrowings	(1,469)		—		(1,258)		(211)
Long-term debt (excluding finance leases)	(44,003)		—		(43,620)		(383)
Long-term liabilities	(467)		—		(467)		—

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References + Details

Variable Interest Entities (Tables)

12 Months Ended

Dec. 31, 2019

Variable Interest Entity [Line Items]

Schedule of Variable Interest Entities [Table Text Block]

The carrying amounts and classification of assets and liabilities for variable interest entities in our Consolidated Balance Sheet as of December 31, 2019 and 2018 are as follows:


(dollars in millions)	2019		2018
Current assets	$	4,573	$	4,732
Noncurrent assets	1,919		1,600
Total assets	$	6,492	$	6,332
Current liabilities	$	4,916	$	4,946
Noncurrent liabilities	2,149		1,898
Total liabilities	$	7,065	$	6,844

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

+ References + Details

Guarantees (Tables)

12 Months Ended

Dec. 31, 2019

Guarantees [Abstract]

Schedule of Guarantor Obligations [Table Text Block]

As of December 31, 2019 and 2018, the following financial guarantees were outstanding:


	December 31, 2019						December 31, 2018
(dollars in millions)	Maximum Potential Payment		Carrying Amount of Liability		Maximum Potential Payment		Carrying Amount of Liability
Commercial aerospace financing arrangements (see Note 4)	$	333	$	7	$	348	$	9
Credit facilities and debt obligations	—		—		116		—
Performance guarantees	48		—		55		5

Product Warranty Disclosure [Table Text Block]

The changes in the carrying amount of service and product warranties and product performance guarantees for the years ended December 31, 2019 and 2018 are as follows:


(dollars in millions)	2019		2018
Balance as of January 1	$	1,449	$	1,146
Warranties and performance guarantees issued	635		604
Settlements made	(512)		(493)
Other¹	(24)		192
Balance as of December 31	$	1,548	$	1,449

1 Other in 2018 is driven by the Rockwell Collins acquisition.

Segment Financial Data (Tables)

12 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Schedule Of Segment Reporting Information By Segment [Table Text Block]


	Net Sales										Operating Profits
(dollars in millions)	2019		2018		2017		2019		2018		2017
Otis	$	13,113	$	12,904	$	12,341	$	1,948	$	1,915	$	2,002
Carrier	18,608		18,922		17,812		2,697		3,777		3,165
Pratt & Whitney	20,892		19,397		16,160		1,668		1,269		1,300
Collins Aerospace Systems	26,028		16,634		14,691		4,100		2,303		2,191
Total segment	78,641		67,857		61,004		10,413		9,264		8,658
Eliminations and other	(1,595)		(1,356)		(1,167)		(932)		(236)		(81)
General corporate expenses	—		—		—		(515)		(475)		(439)
Consolidated	$	77,046	$	66,501	$	59,837	$	8,966	$	8,553	$	8,138


	Total Assets										Capital Expenditures								Depreciation & Amortization
(dollars in millions)	2019		2018		2017		2019		2018		2017		2019		2018		2017
Otis	$	9,973	$	9,374	$	9,421	$	145	$	172	$	133	$	337	$	190	$	177
Carrier	22,789		22,189		22,657		243		263		326		513		357		372
Pratt & Whitney	31,271		29,341		26,768		822		866		923		980		852		672
Collins Aerospace Systems	74,049		73,115		34,567		959		515		527		1,749		883		823
Total segment	138,082		134,019		93,413		2,169		1,816		1,909		3,579		2,282		2,044
Eliminations and other	1,634		192		3,507		87		86		105		204		151		96
Consolidated	$	139,716	$	134,211	$	96,920	$	2,256	$	1,902	$	2,014	$	3,783	$	2,433	$	2,140

Schedule of Revenues From External Customers And Long Lived Assets By Geographic Areas [Table Text Block]


	External Net Sales										Operating Profits								Long-Lived Assets
(dollars in millions)	2019		2018		2017		2019		2018		2017		2019		2018		2017
United States Operations	$	48,288	$	39,481	$	33,912	$	5,505	$	4,941	$	4,126	$	7,498	$	7,111	$	5,323
International Operations
Europe	13,664		12,857		11,879		2,476		2,141		1,959		1,889		1,908		1,817
Asia Pacific	9,391		8,847		8,770		1,662		1,476		1,491		1,359		1,349		1,113
Other	7,298		6,672		6,443		770		706		1,082		1,412		1,363		1,389
Eliminations and other	(1,595)		(1,356)		(1,167)		(1,447)		(711)		(520)		597		566		544
Consolidated	$	77,046	$	66,501	$	59,837	$	8,966	$	8,553	$	8,138	$	12,755	$	12,297	$	10,186

Schedule Of Revenue By Major Customers By Reporting Segments [Table Text Block]


(dollars in millions)	2019		2018		2017
Pratt & Whitney	$	5,614	$	4,489	$	3,347
Collins Aerospace Systems	4,802		2,779		2,299
Other	227		175		152
Total	$	10,643	$	7,443	$	5,798

Revenue from External Customers by Geographic Areas [Table Text Block]


(dollars in millions)	2019		2018		2017
Europe	$	7,122	$	6,285	$	5,273
Asia Pacific	6,479		5,429		3,634
Other	3,847		2,514		2,217
Total	$	17,448	$	14,228	$	11,124

Schedule of Segment Reporting Information, by Geographic Market [Table Text Block]

Sales by primary geographical market for the year ended December 31, 2019 is as follows:


(dollars in millions)	Otis		Carrier		Pratt & Whitney		Collins Aerospace Systems		Total
Primary Geographical Markets
United States	$	3,589	$	9,574	$	16,148	$	18,977	$	48,288
Europe	3,919		5,326		498		3,921		13,664
Asia Pacific	4,591		2,811		1,164		825		9,391
Other*	1,014		897		3,082		2,305		7,298
Total segment	$	13,113	$	18,608	$	20,892	$	26,028	$	78,641
Eliminations and other									(1,595)
Consolidated									$	77,046

Segment Reporting Disclosure, Product & Sales Type [Text Block]

for the year ended December 31, 2019 are as follows:


(dollars in millions)	Otis		Carrier		Pratt & Whitney		Collins Aerospace Systems		Total
Product Type
Commercial and industrial, non aerospace	$	13,113	$	18,608	$	102	$	51	$	31,874
Commercial aerospace	—		—		14,516		19,005		33,521
Military aerospace	—		—		6,274		6,972		13,246
Total segment	$	13,113	$	18,608	$	20,892	$	26,028	$	78,641
Eliminations and other									(1,595)
Consolidated									$	77,046

Sales Type
Product	$	5,669	$	15,360	$	12,977	$	21,440	$	55,446
Service	7,444		3,248		7,915		4,588		23,195
Total segment	$	13,113	$	18,608	$	20,892	$	26,028	$	78,641
Eliminations and other									(1,595)
Consolidated									$	77,046

Selected Quarterly Financial Data - Unaudited (Tables)

12 Months Ended

Dec. 31, 2019

Selected Quarterly Financial Information [Abstract]

Schedule Of Quarterly Financial Information [Table Text Block]

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)


	2019 Quarters														2018 Quarters
(dollars in millions, except per share amounts)	First		Second		Third		Fourth		First		Second		Third		Fourth
Net Sales	$	18,365	$	19,634	$	19,496	$	19,551	$	15,242	$	16,705	$	16,510	$	18,044
Gross margin	4,658		5,221		5,285		4,817		3,962		4,283		3,974		4,297
Net income attributable to common shareowners	1,346		1,900		1,148		1,143		1,297		2,048		1,238		686
Earnings per share of Common Stock:
Basic - net income	$	1.58	$	2.22	$	1.34	$	1.33	$	1.64	$	2.59	$	1.56	$	0.83
Diluted - net income	$	1.56	$	2.20	$	1.33	$	1.32	$	1.62	$	2.56	$	1.54	$	0.83

Leases (Tables)

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Supplemental operating lease cash flow information [Table Text Block]

Supplemental cash flow information related to operating leases was as follows:


(dollars in millions)	Year ended December 31, 2019
Operating cash flows used in the measurement of operating lease liabilities	$	746


Operating lease right-of-use assets obtained in exchange for operating lease obligations	416

Balance Sheet Location, Operating Leases [Table Text Block]

Operating lease right-of-use assets and liabilities are reflected on our Consolidated Balance Sheet as follows:


(dollars in millions, except lease term and discount rate)	December 31, 2019
Operating lease right-of-use assets	$	2,599

Accrued liabilities	$	(544)
Operating lease liabilities	(2,144)
Total operating lease liabilities	$	(2,688)

Supplemental Balance Sheet Information, Operating Leases [Table Text Block]

Supplemental balance sheet information related to operating leases was as follows:


	December 31, 2019
Weighted Average Remaining Lease Term (in years)	7.9

Weighted Average Discount Rate	3.5	%

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

Undiscounted maturities of operating lease liabilities as of December 31, 2019 are as follows:


(dollars in millions)
2020	$	641
2021	542
2022	410
2023	306
2024	234
Thereafter	1,014
Total undiscounted lease payments	3,147
Less imputed interest	(459)
Total discounted lease payments	$	2,688

Summary of Accounting Principles (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 EUR (€)
Accounting Policies [Abstract]
Restricted Cash And Cash Equivalents	$ 42	$ 60	$ 33
Unbilled Contracts Receivable	522	678
Contract Receivable Retainage	111	116
Excess Of Replacement Or Current Costs Over Stated LIFO Value	126	119
Capitalized Contract Cost, Net	1,519	914
Operating profit impact of contract adjustments	$ (69)	(50)	$ (110)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]	Remaining Performance Obligations (RPO). RPO represents the aggregate amount of total contract transaction price that is unsatisfied or partially unsatisfied. As of December 31, 2019 our total RPO was approximately $132.7 billion compared to $115.5 billion as of December 31, 2018. Of the total RPO as of December 31, 2019, we expect approximately 45% will be recognized as sales over the following 24 months.
Revenue, Remaining Performance Obligation, Amount	$ 132,700	$ 115,500
Revenue, Remaining Performance Obligations, to be recognized within 24 months	45.00%			45.00%
Long-term debt, euro-denominated \| €				€ 4,200
Schedule of Unbilled Accounts Receivable [Line Items]
Lessee, Leases	Leases. We account for leases in accordance with ASC Topic 842: Leases. Under Topic 842, the right-of-use model requires a lessee to record a right-of-use asset and a lease liability on the Consolidated Balance Sheet for all leases with terms longer than 12 months. Leases are classified as either finance or operating, with classification affecting the pattern of expense recognition in the Consolidated Statement of Operations. In addition, Topic 842 requires a lessor to classify leases as either sales-type, finance or operating. A lease will be treated as a sale if it transfers all of the risks and rewards, as well as control of the underlying asset, to the lessee. If risks and rewards are conveyed without the transfer of control, the lease is treated as financing. If the lessor doesn’t convey risks and rewards or control, the lease is treated as operating. We enter into lease agreements for the use of real estate space, vehicles, information technology equipment, and certain other equipment under operating and finance leases. We determine if an arrangement contains a lease at inception. Operating leases are included in Operating lease right-of-use assets, Accrued liabilities, and Operating lease liabilities in our Consolidated Balance Sheet. Finance leases are not considered significant to our Consolidated Balance Sheet or Consolidated Statement of Operations. Finance lease right-of-use assets at December 31, 2019 of $55 million are included in Other assets in our Consolidated Balance Sheet. Finance lease liabilities at December 31, 2019 of $84 million are included in Long-term debt currently due, and Long-term debt in our Consolidated Balance Sheet. Right-of-use assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Lease right-of-use assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments, and use the implicit rate when readily determinable. We determine our incremental borrowing rate through market sources including relevant industry rates. Our lease right-of-use assets also include any lease pre-payments and exclude lease incentives. Certain of our leases include variable payments, which may vary based upon changes in facts or circumstances after the start of the lease. We exclude variable payments from lease right-of-use assets and lease liabilities, to the extent not considered fixed, and instead, expense variable payments as incurred. Variable lease expense and lease expense for short duration contracts is not a material component of lease expense. Our leases generally have remaining lease terms of 1 to 20 years, some of which include options to extend leases. For the majority of our leases with options to extend, those options are up to 5 years with the ability to terminate the lease within 1 year. The exercise of lease renewal options is at our sole discretion and our lease right-of-use assets and liabilities reflect only the options we are reasonably certain that we will exercise. Lease expense is recognized on a straight-line basis over the lease term. In limited instances we act as a lessor, primarily for commercial aerospace engines and certain heating, ventilation and air conditioning (HVAC) systems and commercial equipment, all of which are classified as operating leases. These leases are not significant to our Consolidated Balance Sheet or Consolidated Statement of Operations.
Finance Lease, Right-of-Use Asset	$ 55
Finance Lease, Liability	$ 84
Collaborators interests existing programs low end	13.00%			13.00%
Collaborators interests existing programs high end	49.00%			49.00%
Partner share individual program maximum	31.00%			31.00%
Minimum [Member] \| Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Minimum [Member] \| Purchased Service Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Minimum [Member] \| Patents & trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years
Minimum [Member] \| Exclusivity Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Maximum [Member] \| Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	32 years
Maximum [Member] \| Purchased Service Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	25 years
Maximum [Member] \| Patents & trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	40 years
Maximum [Member] \| Exclusivity Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	25 years

Summary of Accounting Principles (Indefinite Lived Intangible Assets) (Details)	12 Months Ended
	Dec. 31, 2019
Collaboration Asset [Member] \| Maximum [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	30 years
Customer Relationships [Member] \| Minimum [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Customer Relationships [Member] \| Maximum [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	32 years
Purchased Service Contracts [Member] \| Minimum [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Purchased Service Contracts [Member] \| Maximum [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	25 years
Patents & trademarks [Member] \| Minimum [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years
Patents & trademarks [Member] \| Maximum [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	40 years
Exclusivity Assets [Member] \| Minimum [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Exclusivity Assets [Member] \| Maximum [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	25 years

Summary of Accounting Principles (Long-Term Receivables) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Total Long Term Receivable	$ 516	$ 527
Financing Receivable, Reserve for Credit Losses and Exposure, Individually Evaluated For Impairment	17	16
Long Term Receivables High Credit Risk		150
Long-term Trade Accounts Receivable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total Long Term Receivable	251	269
Notes and Leases Receivable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total Long Term Receivable	$ 265	$ 258

Summary of Accounting Principles (Collaborative Arrangements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborators interests existing programs low end	13.00%
Collaborators interests existing programs high end	49.00%
Partner share individual program maximum	31.00%
Cost of Products Sold [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborator Share Of Sales	$ 2,097	$ 1,688	$ 1,789
Collaborator Share Of Program Costs	190	209	143
Cost of Services Sold [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborator Share Of Sales	1,674	1,765	929
Research and Development [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborator Share Of Program Costs	219	225	190
Selling General and Administrative [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborator Share Of Program Costs	$ 101	$ 87	$ 74

Summary of Accounting Principles Accounting Pronouncements (Details)	12 Months Ended
	Dec. 31, 2019
Accounting Standards Update 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	In June 2016, the FASB issued Accounting Standards Update (ASU) 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This ASU and its related amendments modifies the impairment model to utilize an expected loss methodology in place of the incurred loss methodology for financial instruments, including trade receivables, contract assets, long-term receivables and off-balance sheet credit exposures. The amendment requires entities to consider a broader range of information to estimate expected credit losses, including historical information, current conditions and a reasonable forecast period, which may result in earlier recognition of certain losses. The provisions of this ASU are effective for years beginning after December 15, 2019, with early adoption permitted. A modified retrospective approach is required with a cumulative-effect adjustment to retained earnings as of January 1, 2020. We are still quantifying the impact of this ASU and its related amendments on our Consolidated Financial Statements which is not expected to be material.
Accounting Standards Update 2018-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement. The new standard removes the disclosure requirements for the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy. This standard did not have a material impact on our financial statement disclosures. We early adopted this standard effective January 1, 2019.
Accounting Standards Update 2018-14 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	In August 2018, the FASB issued ASU 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans. The new standard includes updates to the disclosure requirements for defined benefit plans including several additions, deletions and modifications to the disclosure requirements. The provisions of this ASU are effective for fiscal years ending after December 15, 2020, with early adoption permitted. We are currently evaluating the impact of this ASU.
Accounting Standards Update 2018-15 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	In August 2018, the FASB issued ASU 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. The new standard provides updated guidance surrounding implementation costs associated with cloud computing arrangements that are service contracts. The provisions of this ASU are effective for years beginning after December 15, 2019, with early adoption permitted. We adopted the new standard prospectively effective January 1, 2020. We do not expect this ASU to have a material impact on the Consolidated Financial Statements.
Accounting Standards Update 2018-17 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	In October 2018, the FASB issued ASU 2018-17, Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities. The amendments in this update for determining whether a decision-making fee is a variable interest require reporting entities to consider indirect interests held through related parties under common control on a proportional basis rather than as the equivalent of a direct interest in its entirety (as currently required in generally accepted accounting principles (GAAP)). These amendments also will create alignment between determining whether a decision making fee is a variable interest and determining whether a reporting entity within a related party group is the primary beneficiary of a VIE. This will significantly reduce the risk that decision makers with insignificant direct and indirect interests could be deemed the primary beneficiary of a VIE. The provisions of this ASU are effective for years beginning after December 15, 2019, with early adoption permitted. We adopted the new standard effective January 1, 2020. This ASU did not have an impact on the Consolidated Financial Statements.
Accounting Standards Update 2018-18 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	In November 2018, the FASB issued ASU 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606. The amendments in this update make targeted improvements to GAAP for collaborative arrangements as follows: clarify that certain transactions between collaborative arrangement participants should be accounted for as revenue under Topic 606 when the collaborative arrangement participant is a customer in the context of a unit of account. In those situations, all the guidance in Topic 606 should be applied, including recognition, measurement, presentation, and disclosure requirements; add unit-of-account guidance in Topic 808 to align with the guidance in Topic 606 (that is, a distinct good or service) when an entity is assessing whether the collaborative arrangement or a part of the arrangement is within the scope of Topic 606; and require that in a transaction with a collaborative arrangement participant that is not directly related to sales to third parties, presenting the transaction together with revenue recognized under Topic 606 is precluded if the collaborative arrangement participant is not a customer. The provisions of this ASU are effective for years beginning after December 15, 2019, with early adoption permitted. We adopted the new standard effective January 1, 2020. This ASU did not have an impact on the Consolidated Financial Statements.
ASU 2019-12 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The amendments in this update remove certain exceptions of Topic 740 including: exception to the incremental approach for intraperiod tax allocation when there is a loss from continuing operations and income or gain from other items; exception to the requirement to recognize a deferred tax liability for equity method investments when a foreign subsidiary becomes an equity method investment; exception to the ability not to recognize a deferred tax liability for a foreign subsidiary when a foreign equity method investment becomes a subsidiary; exception to the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. There are also additional areas of guidance in regards to: franchise and other taxes partially based on income and the interim recognition of enactment of tax laws and rate changes. The provisions of this ASU are effective for years beginning after December 15, 2020, with early adoption permitted. We are currently evaluating the impact of this ASU on our consolidated financial statements

- Definition

Disclosure related to a new accounting pronouncement or a change in accounting principle, including the nature and reason for the change and the effect of the change on prior periods and the current period.

+ References + Details

Business Acquisitions, Dispositions, Goodwill and Intangible Assets (Details) - USD ($) shares in Millions			12 Months Ended
	Jan. 20, 2020	Nov. 26, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Acquisition Cost Of Acquired Entities and Interest in Affiliates			$ 56,000,000	$ 31,142,000,000	$ 231,000,000
Proceeds from Issuance of Debt				11,000,000,000.0
Proceeds from Debt, Net of Issuance Costs				10,900,000,000
Contractual Obligation			1,408,000,000
Contractual Obligation, Due in Next Fiscal Year			263,000,000
Contractual Obligation, Due in Second Year			189,000,000
Contractual Obligation, Due in Third Year			148,000,000
Contractual Obligation, Due in Fourth Year			118,000,000
Contractual Obligation, Due in Fifth Year			127,000,000
Business Combination, Acquisition Related Costs			40,000,000	112,000,000	39,000,000
Inventory, Net				175,000,000
Contractual Obligation, Consumed in Current Year			345,000,000	252,000,000
Amortization Expense, Year 1			1,438,000,000
Amortization Expense, Year 2			1,420,000,000
Amortization Expense, Year 3			1,420,000,000
Amortization Expense, Year 4			1,411,000,000
Amortization Expense, Year 5			1,381,000,000
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of Taylor Company				1,000,000,000.0
BAE Systems sale of assets agreement	$ 1,930,000,000
Goodwill [Line Items]
Goodwill			48,063,000,000	48,112,000,000
Goodwill resulting from business combinations			92,000,000
Goodwill, foreign currency translation and other			(141,000,000)
Rockwell Collins [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		$ 640,000,000
Noncash Or Part Noncash Acquisition Debt Assumed		7,800,000,000
Total enterprise value		30,600,000,000
Fair value adjustment, inventory		282,000,000
Fair value adjustment, fixed assets		244,000,000
Contractual Obligation		$ 1,020,000,000.00
Contractual Obligation, Due in Next Fiscal Year			104,000,000
Contractual Obligation, Due in Second Year			104,000,000
Contractual Obligation, Due in Third Year			112,000,000
Contractual Obligation, Due in Fourth Year			96,000,000
Contractual Obligation, Due in Fifth Year			101,000,000
Stock Issued During Period, Value, Acquisitions				$ 7,960,000,000
Business Acquisition, Name of Acquired Entity		Rockwell Collins, Inc. (Rockwell Collins)
Business Acquisition, Effective Date of Acquisition				Nov. 26, 2018
Business Acquisition Cash Paid				$ 93.33
Business Acquisition UTC stock payable				0.37525
Stock Issued During Period, Shares, Acquisitions		62.2
Payments to Acquire Businesses, Gross		$ 15,500,000,000		15,533,000,000
Payments to Acquire Businesses, Net of Cash Acquired		14.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables		1,659,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory		1,487,000,000
Business combination, recognized identifiable assets acquired and liabilities assumed, contract with customer asset, current		320,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other		251,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent		38,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		1,542,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets		1,870,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		217,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		17,344,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt		2,254,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable		520,000,000
Business combination, recognized identifiable assets acquired and liabilities assumed, accrued liabilities current		1,663,000,000
Business combination, recognized identifiable assets acquired and liabilities assumed, contract with customer liabilities, current		299,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		5,530,000,000
Business combination, recognized identifiable assets acquired and liabilities assumed, liability, defined benefit plan, noncurrent		502,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other		3,614,000,000
Business combination, recognized identifiable assets acquired and liabilities assumed, noncontrolling interest		6,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		14,388,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		2,956,000,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net		23,493,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		11,190,000,000
Business Combination, Consideration Transferred				23,493,000,000
Contractual Obligation, Consumed in Current Year			129,000,000
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro Forma Nonrecurring Adjustment, to include the results and related adjustments for B/E Aerospace				0	(51,000,000)
Pro Forma Nonrecurring Adjustments, Net				58,000,000	$ (734,000,000)
Goodwill [Line Items]
Goodwill resulting from business combinations			$ 20,537,000,000
Customer Relationships [Member] \| Rockwell Collins [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		8,720,000,000
Technology-Based Intangible Assets [Member] \| Rockwell Collins [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 600,000,000
Maximum [Member] \| Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			32 years
Maximum [Member] \| Customer Relationships [Member] \| Rockwell Collins [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			23 years
Maximum [Member] \| Technology-Based Intangible Assets [Member] \| Rockwell Collins [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			15 years
Minimum [Member] \| Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			1 year
Minimum [Member] \| Customer Relationships [Member] \| Rockwell Collins [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			10 years
Otis [Member]
Goodwill [Line Items]
Goodwill			$ 1,647,000,000	1,688,000,000
Goodwill resulting from business combinations			16,000,000
Goodwill, foreign currency translation and other			(57,000,000)
Carrier [Member]
Goodwill [Line Items]
Goodwill			9,807,000,000	9,835,000,000
Goodwill resulting from business combinations			1,000,000
Goodwill, foreign currency translation and other			(29,000,000)
Pratt and Whitney [Member]
Goodwill [Line Items]
Goodwill			1,563,000,000	1,567,000,000
Goodwill resulting from business combinations			0
Goodwill, foreign currency translation and other			(4,000,000)
Collins Aerospace Systems [Member]
Goodwill [Line Items]
Goodwill			35,025,000,000	35,001,000,000
Goodwill resulting from business combinations			75,000,000
Goodwill, foreign currency translation and other			(51,000,000)
Total Segments [Member]
Goodwill [Line Items]
Goodwill			48,042,000,000	48,091,000,000
Goodwill resulting from business combinations			92,000,000
Goodwill, foreign currency translation and other			(141,000,000)
Eliminations and other [Member]
Goodwill [Line Items]
Goodwill			21,000,000	$ 21,000,000
Goodwill resulting from business combinations			0
Goodwill, foreign currency translation and other			$ 0

Business Acquisitions, Dispositions, Goodwill and Intangible Assets (Goodwill) (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill	$ 48,063	$ 48,063	$ 48,112
Goodwill resulting from business combinations		92
Goodwill, foreign currency translation and other		(141)
Goodwill, Purchase Accounting Adjustments		475
Business Acquisition [Line Items]
Contractual Obligation, Consumed in Current Year		345	252
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of Taylor Company			1,000
Gain on sale of Taylor Company		0	799	$ 0
After tax gain on the sale of Taylor Company			591
Customer Relationships [Member]
Goodwill [Line Items]
Goodwill, Purchase Accounting Adjustments		400
Otis [Member]
Goodwill [Line Items]
Goodwill	1,647	1,647	1,688
Goodwill resulting from business combinations		16
Goodwill, foreign currency translation and other		(57)
Carrier [Member]
Goodwill [Line Items]
Goodwill	9,807	9,807	9,835
Goodwill resulting from business combinations		1
Goodwill, foreign currency translation and other		(29)
Pratt and Whitney [Member]
Goodwill [Line Items]
Goodwill	1,563	1,563	1,567
Goodwill resulting from business combinations		0
Goodwill, foreign currency translation and other		(4)
Collins Aerospace Systems [Member]
Goodwill [Line Items]
Goodwill	35,025	35,025	35,001
Goodwill resulting from business combinations		75
Goodwill, foreign currency translation and other		(51)
Eliminations and other [Member]
Goodwill [Line Items]
Goodwill	21	21	21
Goodwill resulting from business combinations		0
Goodwill, foreign currency translation and other		0
Total Segments [Member]
Goodwill [Line Items]
Goodwill	$ 48,042	48,042	$ 48,091
Goodwill resulting from business combinations		92
Goodwill, foreign currency translation and other		(141)
Selling, General and Administrative Expenses [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Portfolio separation costs		730
Income tax expense [Domain]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Portfolio separation costs		600
Rockwell Collins [Member]
Goodwill [Line Items]
Goodwill resulting from business combinations		20,537
Business Acquisition [Line Items]
Contractual Obligation, Consumed in Current Year		$ 129
Business Acquisition, Pro Forma Earnings Per Share, Basic			$ 6.82	$ 5.45
Business Acquisition, Pro Forma Earnings Per Share, Diluted			$ 6.76	$ 5.39
Raytheon Company [Member]
Business Acquisition [Line Items]
Business Acquisition UTC stock payable shares	2.3348	2.3348
Business Acquisition, Date of Acquisition Agreement	Jun. 09, 2019

Business Acquisitions, Dispositions, Goodwill and Intangible Assets (Intangible Assets) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Trademarks and other	$ 3,916	$ 3,918
Total	34,449	33,477
Finite-Lived Intangible Assets [Line Items]
Gross Amount	30,533	29,559
Accumulated Amortization	8,403	7,053
Business Acquisition [Line Items]
Contractual Obligation, Consumed in Current Year	345	252
Goodwill [Line Items]
Goodwill resulting from business combinations	92
Goodwill, Purchase Accounting Adjustments	475
Otis [Member]
Goodwill [Line Items]
Goodwill resulting from business combinations	16
Carrier [Member]
Goodwill [Line Items]
Goodwill resulting from business combinations	1
Eliminations and other [Member]
Goodwill [Line Items]
Goodwill resulting from business combinations	0
Service Portfolios [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	2,105	2,164
Accumulated Amortization	1,626	1,608
Patents and trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	356	361
Accumulated Amortization	250	236
Collaboration [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	4,862	4,509
Accumulated Amortization	920	649
Customer Relationships and Other
Finite-Lived Intangible Assets [Line Items]
Gross Amount	23,210	22,525
Accumulated Amortization	5,607	$ 4,560
Goodwill [Line Items]
Goodwill, Purchase Accounting Adjustments	400
Rockwell Collins [Member]
Business Acquisition, Pro Forma Earnings Per Share, Basic		$ 6.82	$ 5.45
Business Acquisition, Pro Forma Earnings Per Share, Diluted		$ 6.76	$ 5.39
Business Acquisition [Line Items]
Contractual Obligation, Consumed in Current Year	129
Goodwill [Line Items]
Goodwill resulting from business combinations	$ 20,537

Business Acquisitions, Dispositions, Goodwill and Intangible Assets (Amortization Expense) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Nov. 26, 2018
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization Expense, Year 1	$ 1,438,000,000								$ 1,438,000,000
Amortization Expense, Year 2	1,420,000,000								1,420,000,000
Amortization Expense, Year 3	1,420,000,000								1,420,000,000
Amortization Expense, Year 4	1,411,000,000								1,411,000,000
Amortization Expense, Year 5	1,381,000,000								1,381,000,000
Amortization of Intangible Assets									1,452,000,000	$ 976,000,000	$ 834,000,000
Revenues	19,551,000,000	$ 19,496,000,000	$ 19,634,000,000	$ 18,365,000,000	$ 18,044,000,000	$ 16,510,000,000	$ 16,705,000,000	$ 15,242,000,000	77,046,000,000	66,501,000,000	59,837,000,000
Goodwill [Line Items]
Goodwill resulting from business combinations									92,000,000
Business Acquisition [Line Items]
Contractual Obligation	1,408,000,000								1,408,000,000
Contractual Obligation, Due in Next Fiscal Year	263,000,000								263,000,000
Collins Aerospace Systems [Member]
Goodwill [Line Items]
Goodwill resulting from business combinations									475,000,000
Pratt and Whitney [Member]
Revenues									20,892,000,000	19,397,000,000	16,160,000,000
Goodwill [Line Items]
Goodwill resulting from business combinations									0
Collins Aerospace Systems [Member]
Revenues									26,028,000,000	16,634,000,000	14,691,000,000
Goodwill [Line Items]
Goodwill resulting from business combinations									75,000,000
Total Segments [Member]
Revenues									78,641,000,000	67,857,000,000	$ 61,004,000,000
Goodwill [Line Items]
Goodwill resulting from business combinations									92,000,000
Rockwell Collins [Member]
Revenues									778,000,000	$ 778,000,000
Goodwill [Line Items]
Goodwill resulting from business combinations									20,537,000,000
Business Acquisition [Line Items]
Contractual Obligation												$ 1,020,000,000.00
Contractual Obligation, Due in Next Fiscal Year	$ 104,000,000								$ 104,000,000

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share amount									8,300,000	5,100,000	5,900,000
Net Income (Loss) Attributable to Common Shareowners
Net income attributable to common shareowners	$ 1,143	$ 1,148	$ 1,900	$ 1,346	$ 686	$ 1,238	$ 2,048	$ 1,297	$ 5,537	$ 5,269	$ 4,552
Basic weighted average number of shares outstanding									854,800,000	800,400,000	790,000,000.0
Stock Awards									9,100,000	9,700,000	9,100,000
Diluted weighted average number of shares outstanding									863,900,000	810,100,000	799,100,000
Earnings Per Share of Common Stock - Basic
Net income attributable to common shareowners	$ 1.33	$ 1.34	$ 2.22	$ 1.58	$ 0.83	$ 1.56	$ 2.59	$ 1.64	$ 6.48	$ 6.58	$ 5.76
Earnings Per Share of Common Stock - Diluted
Net income attributable to common shareowners	$ 1.32	$ 1.33	$ 2.20	$ 1.56	$ 0.83	$ 1.54	$ 2.56	$ 1.62	$ 6.41	$ 6.50	$ 5.70

Commercial Aerospace Industry Assets and Commitments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Nov. 26, 2018	Jul. 26, 2012
Accounts Notes And Loans Receivable [Line Items]
Contractual Obligation	$ 1,408
Contractual Obligation, Consumed in Current Year	345	$ 252
Contractual Obligation, Due in Next Fiscal Year	263
Contractual Obligation, Due in Second Year	189
Contractual Obligation, Due in Third Year	148
Contractual Obligation, Due in Fourth Year	118
Contractual Obligation, Due in Fifth Year	127
Contractual Obligation, Due after Fifth Year	563
Contract with Customer, Asset, after Allowance for Credit Loss	5,522	4,628
Commercial Aerospace [Member]
Accounts Notes And Loans Receivable [Line Items]
Guarantee Obligations Maximum Exposure	333	348
Partner Share of Guarantor Obligations, Maximum Exposure, Undiscounted	142
Commercial Aerospace [Member]
Accounts Notes And Loans Receivable [Line Items]
Accounts, Notes, Loans and Financing Receivable, gross	11,394	11,695
Products Under Lease	3,185	2,736
Notes and leases receivable, total committed	308	299
Commercial Aerospace financing and other contractual commitments	15,000
Notes and leases receivable within one year	30
Notes and leases receivable within two years	23
Notes and leases receivable within three years	14
Notes and leases receivable within four years	22
Notes and leases receivable within five years	38
Notes and leases receivable after five years	181
Commercial aerospace financing commitments, total committed	3,937
Commercial aerospace financing commitments within one year	911
Commercial aerospace financing commitments within two years	1,119
Commercial aerospace financing commitments within three years	974
Commercial aerospace financing commitments within four years	819
Commercial aerospace financing commitments within five years	44
Commercial aerospace financing commitments after five years	70
Other commercial aerospace commitments, total committed	11,055
Other commercial aerospace commitments within one year	702
Other commercial aerospace commitments within two years	736
Other commercial aerospace commitments within three years	717
Other commercial aerospace commitments within four years	668
Other commercial aerospace commitments within five years	627
Other commercial aerospace commitments after five years	7,605
Collaboration partners' share, total committed	5,284
Collaboration partners' share within one year	508
Collaboration partners' share within two years	623
Collaboration partners' share within three years	571
Collaboration partners' share within four years	538
Collaboration partners' share within five years	193
Collaboration partners' share after five years	2,851
Total commercial commitments, total committed	9,708
Total commercial commitments within one year	1,105
Total commercial commitments within two years	1,232
Total commercial commitments within three years	1,120
Total commercial commitments within four years	949
Total commercial commitments within five years	478
Total commercial commitments after five years	4,824
Allowance for Receivables and Other Financing Assets	248	245
Financing Commitments and Guarantees Reserve	7	15
Contract with Customer, Asset, after Allowance for Credit Loss	2,741	$ 2,247
Goodrich Corporation [Member]
Accounts Notes And Loans Receivable [Line Items]
Contractual Obligation				$ 2,200
Rockwell Collins [Member]
Accounts Notes And Loans Receivable [Line Items]
Contractual Obligation			$ 1,020
Contractual Obligation, Consumed in Current Year	129
Contractual Obligation, Due in Next Fiscal Year	104
Contractual Obligation, Due in Second Year	104
Contractual Obligation, Due in Third Year	112
Contractual Obligation, Due in Fourth Year	96
Contractual Obligation, Due in Fifth Year	$ 101

Inventory, Net (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Raw materials	$ 3,357	$ 3,052
Work-in-process	2,726	2,673
Finished goods	4,867	4,358
Inventory, net	10,950	10,083
Inventory Valuation Reserves	$ 1,377	$ 1,270

Contract with Customer, Asset and Liability (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract with Customer, Asset, Net, Current	$ 4,184	$ 3,486
Contract with Customer, Asset, Net, Noncurrent	1,338	1,142
Contract with Customer, Asset, after Allowance for Credit Loss	5,522	4,628
Contract with Customer, Liability, Current	6,180	5,720
Contract with Customer, Liability, Noncurrent	5,732	5,069
Contract with Customer, Liability	11,912	10,789
Contract with Customer, Net	(6,390)	$ (6,161)
Contract with Customer, Asset, Change	894
Contract with Customer, Liability, Change	(1,123)
Contract with Customer, Liability, Revenue Recognized	$ 4,900

Fixed Assets (Details) - USD ($) $ in Millions	12 Months Ended
Fixed Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Land	$ 447	$ 425
Buildings and improvements	6,673	6,486
Machinery, tools and equipment	16,353	15,119
Other, including assets under construction	2,213	2,054
Fixed assets	25,686	24,084
Accumulated depreciation	12,931	11,787
Fixed assets, net	12,755	12,297
Property Plant And Equipment [Line Items]
Depreciation	$ 1,506	$ 1,240	$ 1,178
Land Buildings And Improvements [Member] \| Maximum [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Land Buildings And Improvements [Member] \| Minimum [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	12 years
Machinery And Equipment [Member] \| Maximum [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Machinery And Equipment [Member] \| Minimum [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years

Accrued Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Accrued Liabilities [Abstract]
Accrued salaries, wages and employee benefits	$ 2,407	$ 2,074
Service and warranty accruals	734	754
Interest payable	608	637
Litigation and contract matters	502	461
Income taxes payable	928	460
Accrued property, sales and use taxes	320	277
Canadian government settlement - current portion	0	34
Accrued restructuring costs	208	249
Accrued workers compensation	157	142
Liabilities held for sale	0	40
Other	5,329	5,095
Accrued liabilities	11,737	10,223
Operating Lease, Liability, Current	$ 544	$ 0

Borrowings and Lines of Credit (Short-Term Borrowings) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Short-term Debt [Line Items]
Document Fiscal Year Focus	2019
Commercial Paper	$ 0	$ 1,257
Other borrowings	2,364	212
Total short-term borrowings	$ 2,364	$ 1,469

Borrowings and Lines of Credit (ST Borrowings Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Maximum Commercial Paper Borrowing Authority	$ 6,350
Short Term Line of Credit Facilities Remaining Borrowing Capacities	$ 2,300
Short Term Debt Weighted Average Interest Rate, Avg Outstanding	1.90%	1.50%
Total Debt Weighted Average Interest Rate, Avg Outstanding	3.70%	3.50%
Short Term Debt Weighted Average Interest Rate, Outstanding	3.10%	1.20%
Total Debt Weighted Average Interest Rate, Outstanding	3.70%	3.50%
Line of Credit Facility [Line Items]
Aggregate Line of Credit Facility Maximum Borrowing Capacity	$ 10,350
Multicurrency Revolving Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	2,150
Revolving Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,200

Borrowings and Lines of Credit (Long-Term Debt) (Details)
€ in Millions, $ in Millions

12 Months Ended

Dec. 31, 2019

USD ($)

Dec. 31, 2019

EUR (€)

Dec. 31, 2018

USD ($)

Debt Instrument [Line Items]

Document Fiscal Year Focus

2019

Proceeds from Issuance of Debt

$ 11,000

Project financing obligations

^[1]

$ 309

287

Total principal long-term debt

41,599

44,416

Other debt (including capitalized leases)

331

287

Other (fair market value adjustments, discounts and debt issuance costs)

(315)

(348)

Total long-term debt

41,284

44,068

Less: current portion

3,496

2,876

Long-term debt, net of current portion

37,788

41,192

Long Term Debt Maturities Repayments Of Principal In Next Twelve Months

3,496

Long Term Debt Maturities Repayments Of Principal In Year Two

4,142

Long Term Debt Maturities Repayments Of Principal In Year Three

3,919

Long Term Debt Maturities Repayments Of Principal In Year Four

3,501

Long Term Debt Maturities Repayments Of Principal In Year Five

2,592

Long Term Debt Maturities Repayments Of Principal After Year Five

23,949

LIBOR plus 0.350% floating rate notes due 2019 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[2]

$ 0

350

Debt Instrument, Interest Rate, Stated Percentage

0.35%

Debt Instrument, Maturity Year Date

Libor plus 0.350% floating rate notes due 2019 3

Repayment of Debt, Date

Nov. 01, 2019

Notes 1.500% Due 2019 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 0

650

Debt Instrument, Interest Rate, Stated Percentage

1.50%

Debt Instrument, Maturity Year Date

2019

Repayment of Debt, Date

Nov. 01, 2019

Notes 1.950% Due 2019 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[4]

$ 0

300

Debt Instrument, Interest Rate, Stated Percentage

1.95%

Debt Instrument, Maturity Year Date

2019

Repayment of Debt, Date

Jul. 15, 2019

EURIBOR plus 0.15% floating rate notes due 2019 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[5]

$ 0

858

Debt Instrument, Interest Rate, Stated Percentage

0.15%

Debt Instrument, Maturity Year Date

2019

Repayment of Debt, Date

Nov. 13, 2019

Notes 5.250% Due 2019 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[4]

$ 0

300

Debt Instrument, Interest Rate, Stated Percentage

5.25%

Debt Instrument, Maturity Year Date

2019

Repayment of Debt, Date

Jul. 15, 2019

Notes 8.875% Due 2019 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

$ 0

271

Debt Instrument, Interest Rate, Stated Percentage

8.875%

Debt Instrument, Maturity Year Date

2019

Repayment of Debt, Date

Nov. 15, 2019

Notes 4.875% Due 2020 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 171

171

Debt Instrument, Interest Rate, Stated Percentage

4.875%

Debt Instrument, Maturity Year Date

2020

Notes 4.500% Due 2020 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 1,250

1,250

Debt Instrument, Interest Rate, Stated Percentage

4.50%

Debt Instrument, Maturity Year Date

2020

Notes 1.900% Due 2020 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 1,000

1,000

Debt Instrument, Interest Rate, Stated Percentage

1.90%

Debt Instrument, Maturity Year Date

2020

EURIBOR plus 0.20% floating rate notes due 2020 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

May 18, 2018

Proceeds from Issuance of Debt | €

^[6]

€ 750

Debt Instrument, Carrying Amount

^[5]

$ 831

858

Debt Instrument, Interest Rate, Stated Percentage

0.20%

Debt Instrument, Maturity Year Date

2020

Notes 8.750% Due 2021 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

$ 250

250

Debt Instrument, Interest Rate, Stated Percentage

8.75%

Debt Instrument, Maturity Year Date

2021

Notes 3.100% Due 2021 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[4]

$ 250

250

Debt Instrument, Interest Rate, Stated Percentage

3.10%

Debt Instrument, Maturity Year Date

2021

Notes 3.350% due 2021 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

^[7]

$ 1,000

Debt Instrument, Carrying Amount

^[3]

$ 1,000

1,000

Debt Instrument, Interest Rate, Stated Percentage

3.35%

Debt Instrument, Maturity Year Date

2021

LIBOR plus 0.650% floating rate notes due 2021 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

^[7]

$ 750

Debt Instrument, Carrying Amount

^[3]

$ 750

^[2]

750

^[8]

Debt Instrument, Interest Rate, Stated Percentage

0.65%

Debt Instrument, Maturity Year Date

2021

Notes 1.950% Due 2021 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 750

750

Debt Instrument, Interest Rate, Stated Percentage

1.95%

Debt Instrument, Maturity Year Date

2021

Notes 1.125% Due 2021 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 1,053

1,088

Debt Instrument, Interest Rate, Stated Percentage

1.125%

Debt Instrument, Maturity Year Date

2021

Notes 2.300% Due 2022 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 500

500

Debt Instrument, Interest Rate, Stated Percentage

2.30%

Debt Instrument, Maturity Year Date

2022

Notes 2.800% Due 2022 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[4]

$ 1,100

1,100

Debt Instrument, Interest Rate, Stated Percentage

2.80%

Debt Instrument, Maturity Year Date

2022

Notes 3.100% Due 2022 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 2,300

2,300

Debt Instrument, Interest Rate, Stated Percentage

3.10%

Debt Instrument, Maturity Year Date

2022

Notes 1.250% due 2023 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 831

858

Debt Instrument, Interest Rate, Stated Percentage

1.25%

Debt Instrument, Maturity Year Date

2023

Notes 3.650% Due 2023 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

^[7]

$ 2,250

Debt Instrument, Carrying Amount

^[3]

$ 2,250

2,250

Debt Instrument, Interest Rate, Stated Percentage

3.65%

Debt Instrument, Maturity Year Date

2023

Notes 3.700% Due 2023 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[4]

$ 400

400

Debt Instrument, Interest Rate, Stated Percentage

3.70%

Debt Instrument, Maturity Year Date

2023

Notes 2.800% Due 2024 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 800

800

Debt Instrument, Interest Rate, Stated Percentage

2.80%

Debt Instrument, Maturity Year Date

2024

Notes 3.200% Due 2024 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

$ 950

^[4]

950

Debt Instrument, Interest Rate, Stated Percentage

3.20%

Debt Instrument, Maturity Year Date

2024

Notes 1.150% Due 2024 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

May 18, 2018

Proceeds from Issuance of Debt | €

^[6]

€ 750

Debt Instrument, Carrying Amount

^[3]

$ 831

858

Debt Instrument, Interest Rate, Stated Percentage

1.15%

Debt Instrument, Maturity Year Date

2024

Notes 3.950% Due 2025 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

^[7]

$ 1,500

Debt Instrument, Carrying Amount

^[3]

$ 1,500

1,500

Debt Instrument, Interest Rate, Stated Percentage

3.95%

Debt Instrument, Maturity Year Date

2025

Notes 1.875% Due 2026 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 554

573

Debt Instrument, Interest Rate, Stated Percentage

1.875%

Debt Instrument, Maturity Year Date

2026

Notes 2.650% Due 2026 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 1,150

1,150

Debt Instrument, Interest Rate, Stated Percentage

2.65%

Debt Instrument, Maturity Year Date

2026

Notes 3.125% Due 2027 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 1,100

1,100

Debt Instrument, Interest Rate, Stated Percentage

3.125%

Debt Instrument, Maturity Year Date

2027

Notes 3.500% Due 2027 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[4]

$ 1,300

1,300

Debt Instrument, Interest Rate, Stated Percentage

3.50%

Debt Instrument, Maturity Year Date

2027

Notes 7.100% Due 2027 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

$ 141

141

Debt Instrument, Interest Rate, Stated Percentage

7.10%

Debt Instrument, Maturity Year Date

2027

Notes 6.700% Due 2028 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

$ 400

400

Debt Instrument, Interest Rate, Stated Percentage

6.70%

Debt Instrument, Maturity Year Date

2028

Notes 4.125% Due 2028 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

^[7]

$ 3,000

Debt Instrument, Carrying Amount

^[3]

$ 3,000

3,000

Debt Instrument, Interest Rate, Stated Percentage

4.125%

Debt Instrument, Maturity Year Date

2028

Notes 7.500% Due 2029 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 550

550

Debt Instrument, Interest Rate, Stated Percentage

7.50%

Debt Instrument, Maturity Year Date

2029

Notes 2.150% Due 2030 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

May 18, 2018

Proceeds from Issuance of Debt | €

^[6]

€ 500

Debt Instrument, Carrying Amount

^[3]

$ 554

573

Debt Instrument, Interest Rate, Stated Percentage

2.15%

Debt Instrument, Maturity Year Date

2030

Notes 5.400% Due 2035 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 600

600

Debt Instrument, Interest Rate, Stated Percentage

5.40%

Debt Instrument, Maturity Year Date

2035

Notes 6.050% Due 2036 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 600

600

Debt Instrument, Interest Rate, Stated Percentage

6.05%

Debt Instrument, Maturity Year Date

2036

Notes 6.800% Due 2036 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 134

134

Debt Instrument, Interest Rate, Stated Percentage

6.80%

Debt Instrument, Maturity Year Date

2036

Notes 7.000% Due 2038 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

$ 159

159

Debt Instrument, Interest Rate, Stated Percentage

7.00%

Debt Instrument, Maturity Year Date

2038

Notes 6.125% Due 2038 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 1,000

1,000

Debt Instrument, Interest Rate, Stated Percentage

6.125%

Debt Instrument, Maturity Year Date

2038

Notes 4.450% Due 2038 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

^[7]

$ 750

Debt Instrument, Carrying Amount

^[3]

$ 750

750

Debt Instrument, Interest Rate, Stated Percentage

4.45%

Debt Instrument, Maturity Year Date

2038

Notes 5.700% Due 2040 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 1,000

1,000

Debt Instrument, Interest Rate, Stated Percentage

5.70%

Debt Instrument, Maturity Year Date

2040

Notes 4.500% Due 2042 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 3,500

3,500

Debt Instrument, Interest Rate, Stated Percentage

4.50%

Debt Instrument, Maturity Year Date

2042

Notes 4.800% Due 2043 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[4]

$ 400

400

Debt Instrument, Interest Rate, Stated Percentage

4.80%

Debt Instrument, Maturity Year Date

2043

Notes 4.150% Due 2045 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 850

850

Debt Instrument, Interest Rate, Stated Percentage

4.15%

Debt Instrument, Maturity Year Date

2045

Notes 3.750% Due 2046 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 1,100

1,100

Debt Instrument, Interest Rate, Stated Percentage

3.75%

Debt Instrument, Maturity Year Date

2046

Notes 4.050% Due 2047 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[3]

$ 600

600

Debt Instrument, Interest Rate, Stated Percentage

4.05%

Debt Instrument, Maturity Year Date

2047

Notes 4.350% Due 2047 [Member]

Debt Instrument [Line Items]

Debt Instrument, Carrying Amount

^[4]

$ 1,000

1,000

Debt Instrument, Interest Rate, Stated Percentage

4.35%

Debt Instrument, Maturity Year Date

2047

Notes 4.625% Due 2048 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

^[9]

$ 1,750

Debt Instrument, Carrying Amount

^[3]

$ 1,750

Debt Instrument, Interest Rate, Stated Percentage

4.625%

Debt Instrument, Maturity Year Date

2048

[1]	The project financing obligations included in the table above are associated with the sale of rights to unbilled revenues related to the ongoing activity of an entity owned by Carrier.
[2]	The three-month LIBOR rate as of December 31, 2019 was approximately 1.908%.
[3]	We may redeem these notes at our option pursuant to their terms.
[4]	Rockwell Collins debt which remained outstanding following the Merger.
[5]	The three-month EURIBOR rate as of December 31, 2019 was approximately (0.383)%. The notes may be redeemed at our option in whole, but not in part, at any time in the event of certain developments affecting U.S. taxation.
[6]	3 The net proceeds received from these debt issuances were used for general corporate purposes.
[7]	1 The net proceeds received from these debt issuances were used to partially finance the cash consideration portion of the purchase price for Rockwell Collins and fees, expenses and other amounts related to the acquisition of Rockwell Collins.
[8]	The three-month LIBOR rate as of December 31, 2019 was approximately 1.908%.
[9]	2 The net proceeds from these debt issuances were used to fund the repayment of commercial paper and for other general corporate purposes.

Borrowings and Lines of Credit Borrowings and Lines of Credit (LT Debt Narrative) (Details)
€ in Millions, $ in Millions

12 Months Ended

Dec. 31, 2019

USD ($)

Dec. 31, 2019

EUR (€)

Dec. 31, 2018

USD ($)

Debt Instrument [Line Items]

Proceeds from Issuance of Debt

$ 11,000

Debt Percentage Bearing Variable Interest Rate

9.00%

10.00%

Average Years of Maturity of Long Term Debt

10 years

Notes 3.350% due 2021 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

$ 1,000

^[1]

Debt Instrument, Maturity Year Date

2021

Debt Instrument, Interest Rate, Stated Percentage

3.35%

Notes 3.650% Due 2023 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

$ 2,250

^[1]

Debt Instrument, Maturity Year Date

2023

Debt Instrument, Interest Rate, Stated Percentage

3.65%

Notes 3.950% Due 2025 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

$ 1,500

^[1]

Debt Instrument, Maturity Year Date

2025

Debt Instrument, Interest Rate, Stated Percentage

3.95%

Notes 4.125% Due 2028 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

$ 3,000

^[1]

Debt Instrument, Maturity Year Date

2028

Debt Instrument, Interest Rate, Stated Percentage

4.125%

Notes 4.450% Due 2038 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

$ 750

^[1]

Debt Instrument, Maturity Year Date

2038

Debt Instrument, Interest Rate, Stated Percentage

4.45%

Notes 4.625% Due 2048 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

$ 1,750

^[2]

Debt Instrument, Maturity Year Date

2048

Debt Instrument, Interest Rate, Stated Percentage

4.625%

LIBOR plus 0.650% floating rate notes due 2021 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

Aug. 16, 2018

Proceeds from Issuance of Debt

$ 750

^[1]

Debt Instrument, Maturity Year Date

2021

Debt Instrument, Interest Rate, Stated Percentage

0.65%

Notes 1.150% Due 2024 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

May 18, 2018

Proceeds from Issuance of Debt | €

€ 750

^[3]

Debt Instrument, Maturity Year Date

2024

Debt Instrument, Interest Rate, Stated Percentage

1.15%

Notes 2.150% Due 2030 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

May 18, 2018

Proceeds from Issuance of Debt | €

€ 500

^[3]

Debt Instrument, Maturity Year Date

2030

Debt Instrument, Interest Rate, Stated Percentage

2.15%

EURIBOR plus 0.20% floating rate notes due 2020 [Member]

Debt Instrument [Line Items]

Debt Instrument, Issuance Date

May 18, 2018

Proceeds from Issuance of Debt | €

€ 750

^[3]

Debt Instrument, Maturity Year Date

2020

Debt Instrument, Interest Rate, Stated Percentage

0.20%

Notes 8.875% Due 2019 [Member]

Debt Instrument [Line Items]

Repayment of Debt, Date

Nov. 15, 2019

Repayments of Debt

$ 271

Debt Instrument, Maturity Year Date

2019

Debt Instrument, Interest Rate, Stated Percentage

8.875%

EURIBOR plus 0.15% floating rate notes due 2019 [Member]

Debt Instrument [Line Items]

Repayment of Debt, Date

Nov. 13, 2019

Repayments of Debt | €

€ 750

Debt Instrument, Maturity Year Date

2019

Debt Instrument, Interest Rate, Stated Percentage

0.15%

LIBOR plus 0.350% floating rate notes due 2019 [Member]

Debt Instrument [Line Items]

Repayment of Debt, Date

Nov. 01, 2019

Repayments of Debt

$ 350

Debt Instrument, Maturity Year Date

Libor plus 0.350% floating rate notes due 2019 3

Debt Instrument, Interest Rate, Stated Percentage

0.35%

Notes 1.500% Due 2019 [Member]

Debt Instrument [Line Items]

Repayment of Debt, Date

Nov. 01, 2019

Repayments of Debt

$ 650

Debt Instrument, Maturity Year Date

2019

Debt Instrument, Interest Rate, Stated Percentage

1.50%

Notes 1.950% Due 2019 [Member]

Debt Instrument [Line Items]

Repayment of Debt, Date

Jul. 15, 2019

Repayments of Debt

$ 300

^[4]

Debt Instrument, Maturity Year Date

2019

Debt Instrument, Interest Rate, Stated Percentage

1.95%

Notes 5.250% Due 2019 [Member]

Debt Instrument [Line Items]

Repayment of Debt, Date

Jul. 15, 2019

Repayments of Debt

$ 300

^[4]

Debt Instrument, Maturity Year Date

2019

Debt Instrument, Interest Rate, Stated Percentage

5.25%

Variable-rate term loan due 2020 (1 month LIBOR plus 1.25%) [Member]

Debt Instrument [Line Items]

Repayment of Debt, Date

Dec. 14, 2018

Repayments of Debt

$ 482

^[4]

Junior subordinated notes 1.778% due 2018 [Member]

Debt Instrument [Line Items]

Repayment of Debt, Date

May 04, 2018

Repayments of Debt

$ 1,100

EURIBOR plus 0.800% floating rate notes due 2018 [Member]

Debt Instrument [Line Items]

Repayment of Debt, Date

Feb. 22, 2018

Repayments of Debt | €

€ 750

Notes 6.800% Due 2018 [Member]

Debt Instrument [Line Items]

Repayment of Debt, Date

Feb. 01, 2018

Repayments of Debt

$ 99

[1]	1 The net proceeds received from these debt issuances were used to partially finance the cash consideration portion of the purchase price for Rockwell Collins and fees, expenses and other amounts related to the acquisition of Rockwell Collins.
[2]	2 The net proceeds from these debt issuances were used to fund the repayment of commercial paper and for other general corporate purposes.
[3]	3 The net proceeds received from these debt issuances were used for general corporate purposes.
[4]	These notes and term loan were assumed in connection with the Rockwell Collins acquisition and subsequently repaid.

Employee Benefit Plans (Employee Savings Plans) (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Contribution Plan [Abstract]
Contributions to employer sponsored defined contribution plans	$ 549.0	$ 403.0	$ 351.0
Employee Stock Ownership Plan (ESOP), Plan Description	Our non-union domestic employee savings plan uses an Employee Stock Ownership Plan (ESOP) for employer matching contributions. External borrowings were used by the ESOP to fund a portion of its purchase of ESOP stock from us. The external borrowings have been extinguished and only re-amortized loans remain between UTC and the ESOP Trust. As ESOP debt service payments are made, common stock is released from an unreleased shares account. ESOP debt may be prepaid or re-amortized to either increase or decrease the number of shares released so that the value of released shares equals the value of plan benefit. We may also, at our option, contribute additional common stock or cash to the ESOP.
Employee Stock Ownership Plan (ESOP), Number of Allocated Shares	23.4
Employee Stock Ownership Plan (ESOP), Number of Suspense Shares	7.9
Employee Stock Ownership Plan (ESOP), Deferred Shares, Fair Value	$ 1,200.0
Contract with Customer, Liability, Revenue Recognized	4,900.0
Research and Development Expense [Abstract]
Research and development	3,015.0	2,462.0	2,427.0
Selling, general and administrative	8,521.0	7,066.0	6,429.0
Non-service pension cost (benefit)	(888.0)	(765.0)	(534.0)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (525.0)	$ (393.0)	$ (158.0)
Equity Awards Vested and Expected to Vest, Remaining Term	2 years 10 months 24 days

Employee Benefit Plans (Pension and Postretirement Plans) (Details) - USD ($) $ in Millions		12 Months Ended
	Nov. 26, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Document Fiscal Year Focus		2019
Other		$ (93)	$ 105	$ (116)
Beginning Balance, Plan Assets		35,253
Ending Balance, Plan Assets		39,689	35,253
Noncurrent liability					$ 3,502	$ 4,018
Payment for Pension Benefits		118	147	2,112
Impact of change in estimation of NPPC		(525)	(393)	(158)
Current year actuarial gain (loss)		(543)	(1,819)	241
Current year prior service cost/credit		6	22	(2)
Amortization of prior service credit		228	344	529
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning Balance, Benefit Obligation		810	767
Service Cost		2	2	2
Interest cost		31	26	29
Actuarial loss (gain)		(11)	(52)
Total benefits paid		69	70
Defined Benefit Plan, Benefit Obligation, Business Combination		0	186
Plan amendments	$ (43)	0	(43)
Other		2	(6)
Ending Balance, Benefit Obligation		765	810	767
Beginning Balance, Plan Assets		20	0
Employer Contributions		69	69
Benefits Paid		69	70
Defined Benefit Plan, Plan Assets, Business Combination		0	20
Other		0	1
Ending Balance, Plan Assets		20	20	0
Benefit obligations		810	810	767	765	810
Funded status of plan					(745)	(790)
Current liability					47	61
Noncurrent liability					698	729
Net amount recognized					(745)	(790)
Net actuarial gain (loss)					181	184
Prior service credit					(4)	(47)
Net amount recognized					(185)	$ (231)
Expected return on plan assets		(1)	0	0
Amortization of prior service credit		(42)	(6)	(1)
Recognized actuarial net (gain) loss - in net periodic cost		(12)	(10)	(9)
Impact of change in estimation of NPPC		(22)	$ 12	$ 21
Current year actuarial gain (loss)		10
Amortization of actuarial loss (gain)		(12)
Amortization of prior service credit		(42)
Other		2
Total recognized in other comprehensive loss		46
Net recognized in net periodic pension cost and other comprehensive loss		$ 24
Net actuarial (loss)/gain					13
Prior service credit					$ (3)
Discount rate, benefit obligation					3.00%	4.10%
Discount rate, net cost		4.00%	3.40%	3.80%
Health care cost trend rate assumed for next year					6.50%	7.00%
Rate that the cost trend rate gradually declines to					5.00%	5.00%
Year that the rate reaches the rate it is assumed to remain at		2026	2026
Expected return on plan assets, net cost		7.00%	7.00%
Effect on total service and interest cost - increase		$ 1
Effect on postretirement benefit obligation - increase		25
Effect on total service and interest cost - decrease		1
Effect on postretirement benefit obligation - decrease		22
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Beginning Balance, Benefit Obligation		37,795	$ 36,999
Service Cost		359	372	$ 374
Interest cost		1,340	1,117	1,120
Actuarial loss (gain)		4,651	(2,048)
Total benefits paid		2,174	1,932
Net settlement, curtailment, and special termination benefits		267	38
Defined Benefit Plan, Benefit Obligation, Business Combination		(6)	3,694
Plan amendments		6	65
Other		127	(434)
Ending Balance, Benefit Obligation		41,831	37,795	36,999
Beginning Balance, Plan Assets		35,253	35,689
Actual return on plan assets		6,311	(1,667)
Employer Contributions		207	238
Benefits Paid		2,174	1,932
Defined Benefit Plan, Plan Assets, Business Combination			3,355
Settlements		54	38
Other		156	(392)
Ending Balance, Plan Assets		39,689	35,253	35,689
Benefit obligations		37,795	37,795	36,999	$ 41,831	$ 37,795
Funded status of plan					(2,142)	(2,542)
Noncurrent assets					617	686
Current liability					88	88
Noncurrent liability					2,671	3,140
Net amount recognized					(2,142)	(2,542)
Net actuarial gain (loss)					(8,910)	(8,606)
Prior service credit					203	139
Net amount recognized					9,113	$ 8,745
Expected return on plan assets		2,430	2,255	2,215
Amortization of prior service credit		17	(41)	(36)
Recognized actuarial net (gain) loss - in net periodic cost		265	401	575
Impact of change in estimation of NPPC		(503)	(405)	(179)
Net settlement and curtailment gain (loss)		54	$ (1)	$ (3)
Current year actuarial gain (loss)		(553)
Amortization of actuarial loss (gain)		265
Current year prior service cost/credit		6
Amortization of prior service credit		17
Net settlement and curtailment loss		57
Other		34
Total recognized in other comprehensive loss		368
Net recognized in net periodic pension cost and other comprehensive loss		$ (135)
Net actuarial (loss)/gain					(371)
Prior service credit					51
Total amount to be amortized from AOCI to NPPC					$ 422
Salary scale, benefit obligation					4.20%	4.20%
Expected return on plan assets, benefit obligation					0.00%	0.00%
Salary scale, net cost		4.20%	4.20%	4.10%
Expected return on plan assets, net cost		6.70%	6.80%	7.30%
Fair value of plan assets					$ 36,530	$ 22,803
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation					39,680	28,591
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation					39,178	27,968
Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets					$ 36,921	$ 25,362
Defined Benefit Plan, Plan Assets, Divestiture		$ 10
Pension Plan [Member] \| UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)		(425)
Impact of change in estimation of NPPC		39
Net settlement and curtailment gain (loss)		$ 98
PBO [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate, benefit obligation					3.00%	4.00%
Discount rate, net cost		3.90%	3.40%	3.80%
Interest cost [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate, benefit obligation					0.00%	0.00%
Discount rate, net cost		3.60%	3.00%	3.30%
Service cost [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate, benefit obligation					0.00%	0.00%
Discount rate, net cost		3.60%	3.30%	3.60%
Rockwell Collins [Member] \| Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, liability, pension projected benefit obligation	186
Business combination, recognized identifiable assets acquired and liabilities assumed, asset, pension plan assets	20
Rockwell Collins [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, liability, pension projected benefit obligation	3,700
Business combination, recognized identifiable assets acquired and liabilities assumed, asset, pension plan assets	$ 3,400

Employee Benefit Plans (Pension Plans) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Nov. 26, 2018
Defined Benefit Plan Disclosure [Line Items]
Document Fiscal Year Focus	2019
Defined Benefit Plan, Accumulated Benefit Obligation	$ 41,300	$ 37,000
Payment for Pension Benefits	118	147	$ 2,112
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change	(93)	105	(116)
Research and development	3,015	2,462	2,427
Selling, general and administrative	8,521	7,066	6,429
Other Income	521	1,565	1,358
Non-service pension cost (benefit)	(888)	(765)	(534)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(525)	(393)	(158)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(525)	(393)	(158)
Product [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of Goods and Services Sold	42,444	36,754	31,224
Service [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of Goods and Services Sold	14,621	13,231	12,977
Previously Reported [Member]
Defined Benefit Plan Disclosure [Line Items]
Research and development			2,387
Selling, general and administrative			6,183
Non-service pension cost (benefit)			0
Previously Reported [Member] \| Product [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of Goods and Services Sold			31,027
Previously Reported [Member] \| Service [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of Goods and Services Sold			12,926
Accounting Standards Update 2017-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Research and development			40
Selling, general and administrative			246
Non-service pension cost (benefit)			(534)
Accounting Standards Update 2017-07 [Member] \| Product [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of Goods and Services Sold			197
Accounting Standards Update 2017-07 [Member] \| Service [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of Goods and Services Sold			51
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Payment for Pension Benefits	93	$ 147
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Payment for Pension Benefits	$ 25		$ 1,900
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage Of Projected Benefit Obligation Comprised Of Domestic Plan Benefits	75.00%
Percentage Of Projected Benefit Obligation Comprised Of Foreign Plan Benefits	24.00%
Range Of Growth Seeking Assets In Company's Overall Investment Strategy	45% to 50
Range Of Income Generating Assets In Company's Overall Investment Strategy	50% to 55
Pecentage Of Interest Rate Sensitivity Of Pension Plan Liabilities Fixed Income Portfolio Designed To Hedge	65% to 70
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.70%	6.80%	7.30%
Defined Benefit Plan Common Stock Funded Percentage	1.00%
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change	$ 127	$ (434)
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	125
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	2,428
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	2,230
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	2,263
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	2,289
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	2,303
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	11,597
Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation	39,267	25,884
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	38,816	25,455
Actuarial loss (gain)	4,651	(2,048)
Net settlement and curtailment gain (loss)	54	(1)	$ (3)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(503)	(405)	(179)
Actuarial loss (gain)	4,651	(2,048)
Net settlement and curtailment gain (loss)	54	(1)	(3)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (503)	$ (405)	$ (179)
Pension Plan [Member] \| Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.50%	7.00%
Pension Plan [Member] \| UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	$ (425)
Net settlement and curtailment gain (loss)	98
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	39
Defined Benefit Plan Actuarial Gain	180
Actuarial loss (gain)	(425)
Net settlement and curtailment gain (loss)	98
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	39
Pension Plan [Member] \| UNITED STATES \| Remeasurement loss [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	(605)
Actuarial loss (gain)	$ (605)
Rockwell Collins [Member] \| Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Business combination, recognized identifiable assets acquired and liabilities assumed, liability, pension projected benefit obligation				$ 3,700
Business combination, recognized identifiable assets acquired and liabilities assumed, asset, pension plan assets				$ 3,400

Employee Benefit Plans (Postretirement Benefit Plans) (Narrative) (Details) - Other Postretirement Benefits Plan [Member] $ in Millions	Dec. 31, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Percentage Of Projected Benefit Obligation Comprised Of Domestic Plan Benefits	84.00%
Future Amortization of Gain	$ 13
Future amortization of prior service credit	(3)
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	67
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	64
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	60
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	56
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	53
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 210

Employee Benefit Plans (Multiemployer Plan) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Multiemployer Plans [Line Items]
Document Fiscal Year Focus	2019
Multiemployer Plans General Nature	The risks of participating in these multiemployer plans are different from single-employer plans in that assets contributed are pooled and may be used to provide benefits to employees of other participating employers. If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers. Lastly, if we choose to stop participating in some of our multiemployer plans, we may be required to pay those plans a withdrawal liability based on the underfunded status of the plan.
Entity Tax Identification Number	06-0570975
Multiemployer Plans Period Contributions	$ 159	$ 151	$ 145
Multiemployer Plans Period Contributions Other Than Pensions	$ 21	$ 20	19
National Elevator Industry Plan [Member]
Multiemployer Plans [Line Items]
Entity Tax Identification Number	23-2694291
Multiemployer Plans Certified Zone Status	Green	Green
Multiemployer Plans Funding Improvement Plan And Rehabilitation Plan	No
Multiemployer Plans Period Contributions	$ 127	$ 120	114
Multiemployer Plans Surcharge	No
Multiemployer Plans Collective Bargaining Arrangement Expiration Date	Jul. 08, 2022
Multiemployer Plans, Period Contributions, Significance of Contributions [true false]	true	true
Other Funds [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans Period Contributions	$ 32	$ 31	$ 31

Employee Benefit Plans (Stock Based Compensation) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions

12 Months Ended

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Document Fiscal Year Focus

2019

Cost of Share Based Payments

$ 356

$ 251

$ 192

Equity Awards Vested and Expected to Vest, Remaining Term

2 years 10 months 24 days

Expected Volatility

19.00%

Expected Volatility, Minimum

18.80%

17.50%

Expected Volatility, Maximum

19.70%

21.10%

Expected term (in years)

6 years 6 months

Weighted-average volatility

20.00%

18.00%

19.00%

Expected dividend yield

2.40%

2.20%

2.40%

Risk-free rate, minimum

2.30%

1.30%

0.50%

Risk-free rate, maximum

2.70%

2.50%

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized

184,000

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant

42,000

Expected Range Of Shares Awarded Annually Under Long Term Incentive Plan

1.0% to 1.5%

Minimum [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Expected term (in years)

6 years 6 months

Maximum [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Expected term (in years)

6 years 7 months 6 days

Stock Options [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Period Start, Shares

1,603

Granted, Shares

339

Exercised/earned, Shares

317

Cancelled, Shares

Period End, Shares

1,568

1,603

Period Start, Average Price

^[1]

$ 99.89

Granted, Average Price

^[1]

124.72

Exercised/Earned, Average Price

^[1]

88.61

Cancelled, Average Price

^[1]

121.69

Period End, Average Price

^[1]

$ 106.75

$ 99.89

Share-based Compensation Arrangement by Share-based Payment Award, Ancillary

Share-based Compensation Arrangement by Share-based Payment Award, Ancillary, Average Price

$ 0

Stock Appreciation Rights (SARs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Period Start, Shares

32,066

Granted, Shares

8,081

Exercised/earned, Shares

6,843

Cancelled, Shares

591

Period End, Shares

32,713

32,066

Period Start, Average Price

^[1]

$ 99.95

Granted, Average Price

^[1]

123.54

Exercised/Earned, Average Price

^[1]

84.44

Cancelled, Average Price

^[1]

122.76

Period End, Average Price

^[1]

$ 108.61

$ 99.95

Share-based Compensation Arrangement by Share-based Payment Award, Ancillary

Share-based Compensation Arrangement by Share-based Payment Award, Ancillary, Average Price

$ 0

Performance Share Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Period Start, Shares

1,806

Granted, Shares

839

Exercised/earned, Shares

758

Cancelled, Shares

Period End, Shares

1,919

1,806

Period Start, Average Price

^[2]

$ 110.41

Granted, Average Price

^[2]

121.22

Exercised/Earned, Average Price

^[2]

95.28

Cancelled, Average Price

^[2]

118.21

Period End, Average Price

^[2]

$ 120.04

$ 110.41

Share-based Compensation Arrangement by Share-based Payment Award, Ancillary

101

Share-based Compensation Arrangement by Share-based Payment Award, Ancillary, Average Price

$ 95.28

Other Incentive Shares/Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Period Start, Shares

3,047

Granted, Shares

1,223

Exercised/earned, Shares

816

Cancelled, Shares

135

Period End, Shares

3,319

3,047

Share-based Compensation Arrangement by Share-based Payment Award, Ancillary

Stock Options/Stock Appreciation Rights SARS [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Equity Awards Vested and Expected to Vest, Awards

33,769

Equity Awards Vested and Expected to Vest, Average Price

^[3]

$ 107.58

Equity Awards Vested and Expected to Vest, Average Intrinsic Value

$ 1,424

Equity Awards Vested and Expected to Vest, Remaining Term

5 years 10 months 24 days

Equity Awards That Are Exercisable, Awards

19,285

Equity Awards That Are Exercisable, Average Price

^[3]

$ 96.56

Equity Awards That Are Exercisable, Aggregate Intrinsic Value

$ 1,026

Equity Awards That Are Exercisable, Remaining Term

4 years

Performance Share Units/Other Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Equity Awards Vested and Expected to Vest, Awards

5,514

Equity Awards Vested and Expected to Vest, Average Price

^[3]

$ 0

Equity Awards Vested and Expected to Vest, Average Intrinsic Value

$ 826

Equity Awards Vested and Expected to Vest, Remaining Term

2 years 1 month 6 days

[1]	weighted-average grant / exercise price
[2]	** ancillary shares earned based on actual performance achieved on the 2016 award
[3]	weighted-average exercise price per share

Employee Benefit Plans (Stock Based Compensation) (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected Volatility, Minimum	18.80%	17.50%
Equity Awards Vested and Expected to Vest, Remaining Term	2 years 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	184,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	42,000
Expected Range Of Shares Awarded Annually Under Long Term Incentive Plan	1.0% to 1.5%
Share-based Payment Arrangement, Expense, Tax Benefit	$ 66	$ 42	$ 38
Proceeds from Stock Options Exercised	27	36	29
Share-based Payment Arrangement, Exercise of Option, Tax Benefit	75	59	100
Employee Service Share Based Compensation Tax Benefit Realized From Vesting Of Performance Share Units	36	13	12
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	291
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Vested In Period Total Fair Value	$ 211	$ 149	$ 138
Stock Options/Stock Appreciation Rights SARS [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Awards Vested and Expected to Vest, Awards	33,769
Equity Awards Vested and Expected to Vest, Average Intrinsic Value	$ 1,424
Equity Awards Vested and Expected to Vest, Remaining Term	5 years 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 20.81	$ 20.24	$ 17.22
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 383	$ 283	$ 320
Performance Share Units/Other Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Awards Vested and Expected to Vest, Awards	5,514
Equity Awards Vested and Expected to Vest, Average Intrinsic Value	$ 826
Equity Awards Vested and Expected to Vest, Remaining Term	2 years 1 month 6 days
Share Based Compensation Arrangement By Share Based Payment Award Options and Other Restricted Awards Exercised In Period Total Intrinsic Value	$ 188	$ 74	$ 49
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 117.87	$ 131.55	$ 111.00

Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Income, United States	$ 3,207	$ 3,630	$ 2,990
Income, Foreign	5,036	4,650	4,773
Income from continuing operations before income taxes	8,243	8,280	7,763
Undistributed Earnings of Foreign Subsidiaries	21,000
Current Tax Provision, Federal	188	442	1,577
Current Tax Provision, State	48	211	64
Current Tax Provision, Foreign	2,024	1,238	1,140
Current Income Tax Expense Benefit	2,260	1,891	2,781
Future Tax Provision, Federal	111	57	(27)
Future Tax Provision, State	52	62	84
Future Tax Provision, Foreign	(128)	616	5
Deferred income tax provision	35	735	62
Income tax expense	2,295	2,626	2,843
Attributable to items credited (charged) to equity and goodwill	$ 40	$ 501	$ (128)
Statutory U.S. federal income tax rate	21.00%	21.00%	35.00%
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent	8.80%	0.00%	0.00%
Tax on international activities	1.90%	0.90%	(6.40%)
Tax audit settlements	(3.50%)	0.00%	(0.70%)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	0.00%	9.00%	8.90%
Other	(0.40%)	0.80%	(0.20%)
Effective income tax rate	27.80%	31.70%	36.60%
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	$ 729
US TCJA Tax Law Change [Member]
Income Tax Contingency [Line Items]
Tax Adjustments Settlements And Unusual Provisions		$ 744	$ 690

Income Taxes (Tax Carryforwards) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Tax Credit Carryforward [Line Items]
Insurance and employee benefits	$ 1,205	$ 1,154
Other asset basis differences	829	1,013
Other liability basis differences	2,153	1,482
Tax loss carryforwards	622	583
Tax credit carryforwards	1,021	1,050
Valuation allowances	616	605
Future Income Tax Benefits	5,214	4,677
Deferred Tax Liabilities Intangible Assets	4,293	4,462
Other Asset Basis Differences	2,904	2,159
Other items, net	143	123
Future Income Taxes Payable	7,340	$ 6,744
Tax Credit Carryforwards	1,021
Tax Loss Carryforwards	3,184
Expiration Period Current To Five Years [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforwards	59
Tax Loss Carryforwards	393
Expiration Period Six To Ten Years [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforwards	27
Tax Loss Carryforwards	179
Expiration Period Eleven To Twenty Years [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforwards	336
Tax Loss Carryforwards	394
Expiration Period Indefinite [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforwards	599
Tax Loss Carryforwards	$ 2,218

Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Examination [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 1,338
Balance at January 1	1,619	$ 1,189	$ 1,086
Additions for tax positions related to the current year	131	192	192
Additions for tax positions of prior years	73	344	73
Reductions for tax positions of prior years	101	91	91
Settlements	375	15	71
Balance at December 31	1,347	1,619	1,189
Gross interest expense related to unrecognized tax benefits	57	37	34
Total accrued interest balance at December 31	249	$ 255	215
Minimum [Member]
Income Tax Examination [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	50
Maximum [Member]
Income Tax Examination [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	650
IRS audit of 2014, 2015 and 2016 tax years
Income Tax Examination [Line Items]
Tax Settlement Gain (Loss) Noncash	307
IRS audit of 2014, Rockwell Collins subsidiary
Income Tax Examination [Line Items]
Tax Settlement Gain (Loss) Noncash	40
Reversal of indemnity asset
Income Tax Examination [Line Items]
Tax Settlement Gain (Loss) Noncash	(23)
Various federal, state and non-US statute of limitations expirations and settlements [Member]
Income Tax Examination [Line Items]
Tax Settlement Gain (Loss) Noncash	18
Closure of IRS audit of UTC Tax Year 2013 [Member]
Income Tax Examination [Line Items]
Tax Settlement Gain (Loss) Noncash			64
Tax Settlement Interest Gain (Loss) Noncash			$ 9
Interest Income [Member] \| IRS audit of 2014, Rockwell Collins subsidiary
Income Tax Examination [Line Items]
Tax Settlement Gain (Loss) Noncash	56
Interest Income [Member] \| Various federal, state and non-US statute of limitations expirations and settlements [Member]
Income Tax Examination [Line Items]
Tax Settlement Gain (Loss) Noncash	$ 5

Restructuring and Other Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	$ 425
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	231
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	190
Non-service pension (benefit) [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	4
Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	321
Utilization and foreign exchange	(203)
Restructuring Reserve	118
Expected Costs	444
Restructuring cost incurred	(321)
Remaining Costs	123
Current Year Actions [Member] \| Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	168
Current Year Actions [Member] \| Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	153
Current Year Actions [Member] \| Severance [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	298
Utilization and foreign exchange	(193)
Restructuring Reserve	105
Current Year Actions [Member] \| Facility Exit, Lease Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	23
Utilization and foreign exchange	(10)
Restructuring Reserve	13
Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	46
Utilization and foreign exchange	(161)
Restructuring Reserve	23	$ 138
Expected Costs	258
Restructuring cost incurred	(46)	(207)
Remaining Costs	5
Prior Year Actions [Member] \| Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	21
Prior Year Actions [Member] \| Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	25
Prior Year Actions [Member] \| Severance [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	38
Utilization and foreign exchange	(132)
Restructuring Reserve	21	115
Prior Year Actions [Member] \| Facility Exit, Lease Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	8
Utilization and foreign exchange	(29)
Restructuring Reserve	2	23
Two Years Prior Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	58
Restructuring Reserve	67
Otis [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	54
Otis [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	65
Restructuring cost incurred	(45)
Remaining Costs	20
Otis [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	57
Restructuring cost incurred	(7)	(48)
Remaining Costs	2
Carrier [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	126
Carrier [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	120
Restructuring cost incurred	(110)
Remaining Costs	10
Carrier [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	80
Restructuring cost incurred	(16)	(64)
Remaining Costs	0
Pratt and Whitney [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	133
Pratt and Whitney [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	133
Restructuring cost incurred	(133)
Remaining Costs	0
Pratt and Whitney [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	3
Restructuring cost incurred	0	(3)
Remaining Costs	0
Collins Aerospace Systems [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	106
Collins Aerospace Systems [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	120
Restructuring cost incurred	(27)
Remaining Costs	93
Collins Aerospace Systems [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	111
Restructuring cost incurred	(23)	(87)
Remaining Costs	1
Eliminations and other [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (benefit)	6
Eliminations and other [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	6
Restructuring cost incurred	(6)
Remaining Costs	0
Eliminations and other [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	7
Restructuring cost incurred	0	$ (5)
Remaining Costs	$ 2

Financial Instruments (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 EUR (€)
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments - assets	$ 24	$ 22
Derivatives designated as hedging instruments - liabilities	170	194
Derivatives not designated as hedging instruments - assets	32	63
Derivatives not designated as hedging instruments - liabilities	117	92
Four Quarter Rolling Average Of Notional Amount Of Foreign Exchange Contracts Hedging Foreign Currency Transactions	17,800	20,100
Gain (loss) recorded in Accumulated other comprehensive loss	(33)	(307)
(Gain) loss reclassified from Accumulated other comprehensive loss into Product sales (effective portion)	$ 51	(16)
Description of Net Investment Hedge Activity	We have approximately €4.2 billion of euro-denominated long-term debt, which qualifies as a net investment hedge against our investments in European businesses. As of December 31, 2019, the net investment hedge is deemed to be effective.
Long-term debt, euro-denominated \| €			€ 4,200
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	$ (32)
Gain recognized in Other income, net	$ 46	115
Maximum Length of Time, Foreign Currency Cash Flow Hedge	4 years 20 days
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments - assets	$ 11	10
Derivatives not designated as hedging instruments - assets	27	44
Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments - assets	13	12
Derivatives not designated as hedging instruments - assets	5	19
Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments - liabilities	72	83
Derivatives not designated as hedging instruments - liabilities	116	89
Other Long-Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments - liabilities	98	111
Derivatives not designated as hedging instruments - liabilities	$ 1	$ 3

Fair Value Measurements (Fair Value Hierarchy) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 57	$ 51
Derivative Assets	56	85
Derivative liabilities	287	286
Level 1 \| Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	57	51
Derivative Assets	0	0
Derivative liabilities	0	0
Level 2 \| Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Derivative Assets	56	85
Derivative liabilities	287	286
Level 3 \| Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Derivative Assets	0	0
Derivative liabilities	$ 0	$ 0

Fair Value Measurements (Fair Value Techniques) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term Debt	$ 2,364	$ 1,469
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	344	334
Customer Financing Notes Receivable	283	272
Short-term Debt	2,364	1,469
Long-term debt (excluding capitalized leases)	41,199	43,996
Long-term liabilities	336	508
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	347	314
Customer Financing Notes Receivable	283	265
Short-term Debt	2,364	1,469
Long-term debt (excluding capitalized leases)	46,202	44,003
Long-term liabilities	322	467
Level 1 \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	0	0
Customer Financing Notes Receivable	0	0
Short-term Debt	0	0
Long-term debt (excluding capitalized leases)	0	0
Long-term liabilities	0	0
Level 2 \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	347	314
Customer Financing Notes Receivable	283	265
Short-term Debt	0	1,258
Long-term debt (excluding capitalized leases)	45,802	43,620
Long-term liabilities	322	467
Level 3 \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	0	0
Customer Financing Notes Receivable	0	0
Short-term Debt	2,364	211
Long-term debt (excluding capitalized leases)	400	383
Long-term liabilities	$ 0	$ 0

Variable Interest Entities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets, Total	$ 6,492	$ 6,332
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities, Total	7,065	6,844
Current Assets [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets, Total	4,573	4,732
Noncurrent Assets [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets, Total	1,919	1,600
Current Liabilities [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities, Total	4,916	4,946
Noncurrent Liabilities [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities, Total	$ 2,149	$ 1,898
International Aero Engines AG [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Methodology	Pratt & Whitney holds a 61% program share interest in the International Aero Engines AG (IAE) collaboration with MTU Aero Engines AG (MTU) and Japanese Aero Engines Corporation (JAEC) and a 49.5% ownership interest in IAE. IAE's business purpose is to coordinate the design, development, manufacturing and product support of the V2500 engine program through involvement with the collaborators.
Noncurrent assets	49.50%
International Aero Engines LLC [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Methodology	Additionally, Pratt & Whitney, JAEC and MTU are participants in International Aero Engines, LLC (IAE LLC), whose business purpose is to coordinate the design, development, manufacturing and product support for the PW1100G-JM engine for the Airbus A320neo aircraft and the PW1400G-JM engine for the Irkut MC21 aircraft. Pratt & Whitney holds a 59% program share interest and a 59% ownership interest in IAE LLC. IAE and IAE LLC retain limited equity with the primary economics of the programs passed to the participants.
Noncurrent assets	59.00%

Guarantees (Details) - USD ($)
$ in Millions

12 Months Ended

Dec. 31, 2019

Dec. 31, 2018

Guarantee Obligations [Line Items]

Environmental, health and safety, tax and employment matters

$ 166

$ 175

Balance as of January 1

1,449

^[1]

1,146

Warranties and performance guarantees issued

604

Settlements made

512

493

Other

(24)

192

Balance as of December 31

1,548

1,449

^[1]

Standard Product Warranty Accrual, Increase for Warranties Issued

635

Commercial aerospace financing arrangements (see Note 5)

Guarantee Obligations [Line Items]

Maximum Potential Payment

333

348

Carrying Amount of Liability

Credit Facilities And Debt Obligations (expire 2019 to 2028)

Guarantee Obligations [Line Items]

Maximum Potential Payment

116

Carrying Amount of Liability

Performance Guarantees

Guarantee Obligations [Line Items]

Maximum Potential Payment

Carrying Amount of Liability

$ 0

$ 5

[1]

Contingent Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
Contingent Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Accrual For Environmental Loss Contingencies	$ 896	$ 830
German Tax Office Against Otis - cash payments in prior year [Member]
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	August 3, 2012
Loss Contingency Allegations	As previously disclosed, UTC has been involved in administrative review proceedings with the German Tax Office, which concern approximately €215 million (approximately $239 million) of tax benefits that we have claimed related to a 1998 reorganization of the corporate structure of Otis operations in Germany. Upon audit, these tax benefits were disallowed by the German Tax Office. UTC estimates interest associated with the aforementioned tax benefits is an additional approximately €118 million (approximately $131 million). On August 3, 2012, we filed suit in the local German Tax Court (Berlin-Brandenburg). In March 2016, the local German Tax Court dismissed our suit, and we appealed this decision to the German Federal Tax Court (FTC). Following a hearing on July 24, 2018, the FTC remanded the matter to the local German Tax Court for further proceedings.
Loss Contingency Actions Taken By Defendant	In 2015, UTC made tax and interest payments to German tax authorities of €275 million (approximately $300 million) in order to avoid additional interest accruals pending final resolution of this matter.
U.S. Defense Contract Management Agency Claim Against Pratt & Whitney [Member]
Loss Contingencies [Line Items]
Loss Contingency Damages Sought	177 million
German Tax Office Against Otis [Member]
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	August 3, 2012
Loss Contingency, Interest	€118 million (approximately $131 million)
Loss Contingency Damages Sought	€215 million (approximately $239 million)
Loss Contingency, Interest Paid	€275 million (approximately $300 million)
U.S. Defense Contract Management Claim against Pratt & Whitney
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	December 2013
Loss Contingency Allegations	As previously disclosed, in December 2013, a DCMA DACO asserted a claim against Pratt & Whitney to recover overpayments of approximately $177 million plus interest (approximately $98.4 million through December 31, 2019). The claim is based on Pratt & Whitney's alleged noncompliance with cost accounting standards from January 1, 2005 to December 31, 2012, due to its method of determining the cost of collaborator parts used in the calculation of material overhead costs for government contracts. In 2014, Pratt & Whitney filed an appeal to the ASBCA. An evidentiary hearing was held and completed in June 2019. The parties are now engaged in post-hearing briefing, and a decision from the ASBCA will follow. We continue to believe that the claim is without merit.
Loss Contingency Actions Taken By Defendant	In December 2018, a DCMA DACO issued a second claim against Pratt & Whitney that similarly alleges that its method of determining the cost of collaborator parts does not comply with the cost accounting standards for calendar years 2013 through 2017. This second claim demands payment of $269 million plus interest (approximately $56.2 million through December 31, 2019), which we also believe is without merit and which Pratt & Whitney appealed to the ASBCA in January 2019.
Loss Contingency, Interest	98.4 million
Asbestos Matter [Member]
Loss Contingencies [Line Items]
Loss Contingency Allegations	As previously disclosed, like many other industrial companies, we and our subsidiaries have been named as defendants in lawsuits alleging personal injury as a result of exposure to asbestos integrated into certain of our products or business premises. While we have never manufactured asbestos and no longer incorporate it in any currently-manufactured products, certain of our historical products, like those of many other manufacturers, have contained components incorporating asbestos. A substantial majority of these asbestos-related claims have been dismissed without payment or were covered in full or in part by insurance or other forms of indemnity. Additional cases were litigated and settled without any insurance reimbursement. The amounts involved in asbestos related claims were not material individually or in the aggregate in any year.
Loss Contingency, Receivable	$ 140
Loss Contingency, Management's Assessment and Process	The amounts recorded by UTC for asbestos-related liabilities and insurance recoveries are based on currently available information and assumptions that we believe are reasonable. Our actual liabilities or insurance recoveries could be higher or lower than those recorded if actual results vary significantly from the assumptions. Key variables in these assumptions include the number and type of new claims to be filed each year, the outcomes or resolution of such claims, the average cost of resolution of each new claim, the amount of insurance available, allocation methodologies, the contractual terms with each insurer with whom we have reached settlements, the resolution of coverage issues with other excess insurance carriers with whom we have not yet achieved settlements, and the solvency risk with respect to our insurance carriers. Other factors that may affect our future liability include uncertainties surrounding the litigation process from jurisdiction to jurisdiction and from case to case, legal rulings that may be made by state and federal courts, and the passage of state or federal legislation. At the end of each year, the Company will evaluate all of these factors and, with input from an outside actuarial expert, make any necessary adjustments to both our estimated asbestos liabilities and insurance recoveries.
Asbestos Matter [Member] \| Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 330
Asbestos Matter [Member] \| Maximum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 400
U.S. Defense Contract Management Second Claim against Pratt and Whitney [Member]
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	December 2018
Loss Contingency, Interest	56.2 million
Loss Contingency Damages Sought	269 million

Segment Financial Data (By Segment) (Details) - USD ($)
$ in Millions

3 Months Ended

12 Months Ended

Dec. 31, 2019

Sep. 30, 2019

Jun. 30, 2019

Mar. 31, 2019

Dec. 31, 2018

Sep. 30, 2018

Jun. 30, 2018

Mar. 31, 2018

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

Segment Reporting Information [Line Items]

Document Fiscal Year Focus

2019

Revenues

$ 19,551

$ 19,496

$ 19,634

$ 18,365

$ 18,044

$ 16,510

$ 16,705

$ 15,242

$ 77,046

$ 66,501

$ 59,837

Operating Income (Loss)

8,966

8,553

8,138

Total Assets

139,716

134,211

139,716

134,211

96,920

Capital Expenditures

2,256

1,902

2,014

Depreciation & Amortization

3,783

2,433

2,140

Major Customers, U.S. Government Sales

10,643

7,443

5,798

Major Customers, Airbus Sales

$ 9,879

10,025

8,908

Segment Financial Data

SEGMENT FINANCIAL DATA

Otis products include elevators, escalators, moving walkways and service sold to customers in the commercial, residential and infrastructure property sectors around the world.


	Net Sales										Operating Profits
(dollars in millions)	2019		2018		2017		2019		2018		2017
Otis	$	13,113	$	12,904	$	12,341	$	1,948	$	1,915	$	2,002
Carrier	18,608		18,922		17,812		2,697		3,777		3,165
Pratt & Whitney	20,892		19,397		16,160		1,668		1,269		1,300
Collins Aerospace Systems	26,028		16,634		14,691		4,100		2,303		2,191
Total segment	78,641		67,857		61,004		10,413		9,264		8,658
Eliminations and other	(1,595)		(1,356)		(1,167)		(932)		(236)		(81)
General corporate expenses	—		—		—		(515)		(475)		(439)
Consolidated	$	77,046	$	66,501	$	59,837	$	8,966	$	8,553	$	8,138


	Total Assets										Capital Expenditures								Depreciation & Amortization
(dollars in millions)	2019		2018		2017		2019		2018		2017		2019		2018		2017
Otis	$	9,973	$	9,374	$	9,421	$	145	$	172	$	133	$	337	$	190	$	177
Carrier	22,789		22,189		22,657		243		263		326		513		357		372
Pratt & Whitney	31,271		29,341		26,768		822		866		923		980		852		672
Collins Aerospace Systems	74,049		73,115		34,567		959		515		527		1,749		883		823
Total segment	138,082		134,019		93,413		2,169		1,816		1,909		3,579		2,282		2,044
Eliminations and other	1,634		192		3,507		87		86		105		204		151		96
Consolidated	$	139,716	$	134,211	$	96,920	$	2,256	$	1,902	$	2,014	$	3,783	$	2,433	$	2,140


	External Net Sales										Operating Profits								Long-Lived Assets
(dollars in millions)	2019		2018		2017		2019		2018		2017		2019		2018		2017
United States Operations	$	48,288	$	39,481	$	33,912	$	5,505	$	4,941	$	4,126	$	7,498	$	7,111	$	5,323
International Operations
Europe	13,664		12,857		11,879		2,476		2,141		1,959		1,889		1,908		1,817
Asia Pacific	9,391		8,847		8,770		1,662		1,476		1,491		1,359		1,349		1,113
Other	7,298		6,672		6,443		770		706		1,082		1,412		1,363		1,389
Eliminations and other	(1,595)		(1,356)		(1,167)		(1,447)		(711)		(520)		597		566		544
Consolidated	$	77,046	$	66,501	$	59,837	$	8,966	$	8,553	$	8,138	$	12,755	$	12,297	$	10,186

Sales from U.S. operations include export sales as follows:


(dollars in millions)	2019		2018		2017
Europe	$	7,122	$	6,285	$	5,273
Asia Pacific	6,479		5,429		3,634
Other	3,847		2,514		2,217
Total	$	17,448	$	14,228	$	11,124

Sales by primary geographical market for the year ended December 31, 2019 is as follows:


(dollars in millions)	Otis		Carrier		Pratt & Whitney		Collins Aerospace Systems		Total
Primary Geographical Markets
United States	$	3,589	$	9,574	$	16,148	$	18,977	$	48,288
Europe	3,919		5,326		498		3,921		13,664
Asia Pacific	4,591		2,811		1,164		825		9,391
Other*	1,014		897		3,082		2,305		7,298
Total segment	$	13,113	$	18,608	$	20,892	$	26,028	$	78,641
Eliminations and other									(1,595)
Consolidated									$	77,046

Sales by primary geographical market for the year ended December 31, 2018 is as follows:


(dollars in millions)	Otis		Carrier		Pratt & Whitney		Collins Aerospace Systems		Total
Primary Geographical Markets
United States	$	3,433	$	9,402	$	14,852	$	11,794	$	39,481
Europe	4,055		5,710		594		2,498		12,857
Asia Pacific	4,354		2,849		1,277		367		8,847
Other*	1,062		961		2,674		1,975		6,672
Total segment	$	12,904	$	18,922	$	19,397	$	16,634	$	67,857
Eliminations and other									(1,356)
Consolidated									$	66,501

*Other includes sales to other regions as well as intersegment sales.

Segment sales disaggregated by product type and product versus service for the year ended December 31, 2019 are as follows:


(dollars in millions)	Otis		Carrier		Pratt & Whitney		Collins Aerospace Systems		Total
Product Type
Commercial and industrial, non aerospace	$	13,113	$	18,608	$	102	$	51	$	31,874
Commercial aerospace	—		—		14,516		19,005		33,521
Military aerospace	—		—		6,274		6,972		13,246
Total segment	$	13,113	$	18,608	$	20,892	$	26,028	$	78,641
Eliminations and other									(1,595)
Consolidated									$	77,046

Sales Type
Product	$	5,669	$	15,360	$	12,977	$	21,440	$	55,446
Service	7,444		3,248		7,915		4,588		23,195
Total segment	$	13,113	$	18,608	$	20,892	$	26,028	$	78,641
Eliminations and other									(1,595)
Consolidated									$	77,046

Segment sales disaggregated by product type and product versus service for the year ended December 31, 2018 are as follows:


(dollars in millions)	Otis		Carrier		Pratt & Whitney		Collins Aerospace Systems		Total
Product Type
Commercial and industrial, non aerospace	$	12,904	$	18,922	$	55	$	60	$	31,941
Commercial aerospace	—		—		14,027		12,564		26,591
Military aerospace	—		—		5,315		4,010		9,325
Total segment	$	12,904	$	18,922	$	19,397	$	16,634	$	67,857
Eliminations and other									(1,356)
Consolidated									$	66,501

Sales Type
Product	$	5,636	$	15,682	$	11,410	$	13,915	$	46,643
Service	7,268		3,240		7,987		2,719		21,214
Total segment	$	12,904	$	18,922	$	19,397	$	16,634	$	67,857
Eliminations and other									(1,356)
Consolidated									$	66,501

Major Customers. Net Sales include sales under prime contracts and subcontracts to the U.S. Government, primarily related to Pratt & Whitney and Collins Aerospace Systems products, as follows:


(dollars in millions)	2019		2018		2017
Pratt & Whitney	$	5,614	$	4,489	$	3,347
Collins Aerospace Systems	4,802		2,779		2,299
Other	227		175		152
Total	$	10,643	$	7,443	$	5,798

Schedule Of Segment Reporting Information By Segment [Table Text Block]


	Net Sales										Operating Profits
(dollars in millions)	2019		2018		2017		2019		2018		2017
Otis	$	13,113	$	12,904	$	12,341	$	1,948	$	1,915	$	2,002
Carrier	18,608		18,922		17,812		2,697		3,777		3,165
Pratt & Whitney	20,892		19,397		16,160		1,668		1,269		1,300
Collins Aerospace Systems	26,028		16,634		14,691		4,100		2,303		2,191
Total segment	78,641		67,857		61,004		10,413		9,264		8,658
Eliminations and other	(1,595)		(1,356)		(1,167)		(932)		(236)		(81)
General corporate expenses	—		—		—		(515)		(475)		(439)
Consolidated	$	77,046	$	66,501	$	59,837	$	8,966	$	8,553	$	8,138


	Total Assets										Capital Expenditures								Depreciation & Amortization
(dollars in millions)	2019		2018		2017		2019		2018		2017		2019		2018		2017
Otis	$	9,973	$	9,374	$	9,421	$	145	$	172	$	133	$	337	$	190	$	177
Carrier	22,789		22,189		22,657		243		263		326		513		357		372
Pratt & Whitney	31,271		29,341		26,768		822		866		923		980		852		672
Collins Aerospace Systems	74,049		73,115		34,567		959		515		527		1,749		883		823
Total segment	138,082		134,019		93,413		2,169		1,816		1,909		3,579		2,282		2,044
Eliminations and other	1,634		192		3,507		87		86		105		204		151		96
Consolidated	$	139,716	$	134,211	$	96,920	$	2,256	$	1,902	$	2,014	$	3,783	$	2,433	$	2,140

Schedule of Revenues From External Customers And Long Lived Assets By Geographic Areas [Table Text Block]


	External Net Sales										Operating Profits								Long-Lived Assets
(dollars in millions)	2019		2018		2017		2019		2018		2017		2019		2018		2017
United States Operations	$	48,288	$	39,481	$	33,912	$	5,505	$	4,941	$	4,126	$	7,498	$	7,111	$	5,323
International Operations
Europe	13,664		12,857		11,879		2,476		2,141		1,959		1,889		1,908		1,817
Asia Pacific	9,391		8,847		8,770		1,662		1,476		1,491		1,359		1,349		1,113
Other	7,298		6,672		6,443		770		706		1,082		1,412		1,363		1,389
Eliminations and other	(1,595)		(1,356)		(1,167)		(1,447)		(711)		(520)		597		566		544
Consolidated	$	77,046	$	66,501	$	59,837	$	8,966	$	8,553	$	8,138	$	12,755	$	12,297	$	10,186

Revenue from External Customers by Geographic Areas [Table Text Block]


(dollars in millions)	2019		2018		2017
Europe	$	7,122	$	6,285	$	5,273
Asia Pacific	6,479		5,429		3,634
Other	3,847		2,514		2,217
Total	$	17,448	$	14,228	$	11,124

Total Segments [Member]

Segment Reporting Information [Line Items]

Revenues

$ 78,641

67,857

61,004

Operating Income (Loss)

10,413

9,264

8,658

Total Assets

138,082

134,019

138,082

134,019

93,413

Capital Expenditures

2,169

1,816

1,909

Depreciation & Amortization

3,579

2,282

2,044

Eliminations and other [Member]

Segment Reporting Information [Line Items]

Revenues

(1,595)

(1,356)

(1,167)

Operating Income (Loss)

(932)

(236)

(81)

Total Assets

1,634

192

1,634

192

3,507

Capital Expenditures

105

Depreciation & Amortization

204

151

General corporate expenses [Member]

Segment Reporting Information [Line Items]

Revenues

Operating Income (Loss)

(515)

(475)

(439)

Other [Member]

Segment Reporting Information [Line Items]

Major Customers, U.S. Government Sales

227

175

152

Otis [Member]

Segment Reporting Information [Line Items]

Revenues

13,113

12,904

12,341

Operating Income (Loss)

1,948

1,915

2,002

Total Assets

9,973

9,374

9,973

9,374

9,421

Capital Expenditures

145

172

133

Depreciation & Amortization

337

190

177

Carrier [Member]

Segment Reporting Information [Line Items]

Revenues

18,608

18,922

17,812

Operating Income (Loss)

2,697

3,777

3,165

Total Assets

22,789

22,189

22,789

22,189

22,657

Capital Expenditures

243

263

326

Depreciation & Amortization

513

357

372

Pratt and Whitney [Member]

Segment Reporting Information [Line Items]

Revenues

20,892

19,397

16,160

Operating Income (Loss)

1,668

1,269

1,300

Total Assets

31,271

29,341

31,271

29,341

26,768

Capital Expenditures

822

866

923

Depreciation & Amortization

980

852

672

Major Customers, U.S. Government Sales

5,614

4,489

3,347

Collins Aerospace Systems [Member]

Segment Reporting Information [Line Items]

Revenues

26,028

16,634

14,691

Operating Income (Loss)

4,100

2,303

2,191

Total Assets

$ 74,049

$ 73,115

74,049

73,115

34,567

Capital Expenditures

959

515

527

Depreciation & Amortization

1,749

883

823

Major Customers, U.S. Government Sales

4,802

$ 2,779

$ 2,299

Commercial Aerospace [Member] | Total Segments [Member]

Segment Reporting Information [Line Items]

Revenues

33,521

Commercial Aerospace [Member] | Otis [Member]

Segment Reporting Information [Line Items]

Revenues

Commercial Aerospace [Member] | Carrier [Member]

Segment Reporting Information [Line Items]

Revenues

Commercial Aerospace [Member] | Pratt and Whitney [Member]

Segment Reporting Information [Line Items]

Revenues

14,516

Commercial Aerospace [Member] | Collins Aerospace Systems [Member]

Segment Reporting Information [Line Items]

Revenues

19,005

Military aerospace [Member] | Total Segments [Member]

Segment Reporting Information [Line Items]

Revenues

13,246

Military aerospace [Member] | Otis [Member]

Segment Reporting Information [Line Items]

Revenues

Military aerospace [Member] | Carrier [Member]

Segment Reporting Information [Line Items]

Revenues

Military aerospace [Member] | Pratt and Whitney [Member]

Segment Reporting Information [Line Items]

Revenues

6,274

Military aerospace [Member] | Collins Aerospace Systems [Member]

Segment Reporting Information [Line Items]

Revenues

6,972

Commercial and industrial, non aerospace [Member] | Total Segments [Member]

Segment Reporting Information [Line Items]

Revenues

31,874

Commercial and industrial, non aerospace [Member] | Otis [Member]

Segment Reporting Information [Line Items]

Revenues

13,113

Commercial and industrial, non aerospace [Member] | Carrier [Member]

Segment Reporting Information [Line Items]

Revenues

18,608

Commercial and industrial, non aerospace [Member] | Pratt and Whitney [Member]

Segment Reporting Information [Line Items]

Revenues

102

Commercial and industrial, non aerospace [Member] | Collins Aerospace Systems [Member]

Segment Reporting Information [Line Items]

Revenues

Product [Member] | Otis [Member]

Segment Reporting Information [Line Items]

Revenues

5,669

Product [Member] | Carrier [Member]

Segment Reporting Information [Line Items]

Revenues

15,360

Product [Member] | Pratt and Whitney [Member]

Segment Reporting Information [Line Items]

Revenues

12,977

Product [Member] | Collins Aerospace Systems [Member]

Segment Reporting Information [Line Items]

Revenues

21,440

Service [Member] | Otis [Member]

Segment Reporting Information [Line Items]

Revenues

7,444

Service [Member] | Carrier [Member]

Segment Reporting Information [Line Items]

Revenues

3,248

Service [Member] | Pratt and Whitney [Member]

Segment Reporting Information [Line Items]

Revenues

7,915

Service [Member] | Collins Aerospace Systems [Member]

Segment Reporting Information [Line Items]

Revenues

$ 4,588

Segment Financial Data (By Geographic Region) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Document Fiscal Year Focus									2019
Revenues	$ 19,551	$ 19,496	$ 19,634	$ 18,365	$ 18,044	$ 16,510	$ 16,705	$ 15,242	$ 77,046	$ 66,501	$ 59,837
External Net Sales by Geography									77,046	66,501	59,837
United States Export Sales									$ 17,448	$ 14,228	$ 11,124
Operating Income (Loss)									$ 8,966	$ 8,553	$ 8,138
Long-Lived Assets by Geography									12,755	12,297	10,186
UNITED STATES
External Net Sales by Geography									48,288	39,481	33,912
Operating Income (Loss)									$ 5,505	$ 4,941	$ 4,126
Long-Lived Assets by Geography									7,498	7,111	5,323
Europe [Member]
External Net Sales by Geography									13,664	12,857	11,879
United States Export Sales									$ 7,122	$ 6,285	$ 5,273
Operating Income (Loss)									$ 2,476	$ 2,141	$ 1,959
Long-Lived Assets by Geography									1,889	1,908	1,817
Asia Pacific [Member]
External Net Sales by Geography									9,391	8,847	8,770
United States Export Sales									$ 6,479	$ 5,429	$ 3,634
Operating Income (Loss)									$ 1,662	$ 1,476	$ 1,491
Long-Lived Assets by Geography									1,359	1,349	1,113
Other
External Net Sales by Geography									7,298	6,672	6,443
United States Export Sales									$ 3,847	$ 2,514	$ 2,217
Operating Income (Loss)									$ 770	$ 706	$ 1,082
Long-Lived Assets by Geography									1,412	1,363	1,389
Eliminations and other
External Net Sales by Geography									(1,595)	(1,356)	(1,167)
Operating Income (Loss)									$ (1,447)	$ (711)	$ (520)
Long-Lived Assets by Geography									597	566	544
Total Segments [Member]
Revenues									$ 78,641	$ 67,857	$ 61,004
Operating Income (Loss)									10,413	9,264	8,658
Collins Aerospace Systems [Member]
Revenues									26,028	16,634	14,691
Operating Income (Loss)									4,100	2,303	2,191
Collins Aerospace Systems [Member] \| UNITED STATES
Revenues									18,977	11,794
Collins Aerospace Systems [Member] \| Other [Member]
Revenues									2,305	1,975
Collins Aerospace Systems [Member] \| Asia Pacific [Member]
Revenues									825	367
Collins Aerospace Systems [Member] \| Europe [Member]
Revenues									3,921	2,498
Pratt and Whitney [Member]
Revenues									20,892	19,397	16,160
Operating Income (Loss)									1,668	1,269	1,300
Pratt and Whitney [Member] \| UNITED STATES
Revenues									16,148	14,852
Pratt and Whitney [Member] \| Other [Member]
Revenues									3,082	2,674
Pratt and Whitney [Member] \| Asia Pacific [Member]
Revenues									1,164	1,277
Pratt and Whitney [Member] \| Europe [Member]
Revenues									498	594
Carrier [Member]
Revenues									18,608	18,922	17,812
Operating Income (Loss)									2,697	3,777	3,165
Carrier [Member] \| UNITED STATES
Revenues									9,574	9,402
Carrier [Member] \| Other [Member]
Revenues									897	961
Carrier [Member] \| Asia Pacific [Member]
Revenues									2,811	2,849
Carrier [Member] \| Europe [Member]
Revenues									5,326	5,710
Otis [Member]
Revenues									13,113	12,904	12,341
Operating Income (Loss)									1,948	1,915	2,002
Otis [Member] \| UNITED STATES
Revenues									3,589	3,433
Otis [Member] \| Other [Member]
Revenues									1,014	1,062
Otis [Member] \| Asia Pacific [Member]
Revenues									4,591	4,354
Otis [Member] \| Europe [Member]
Revenues									3,919	4,055
Eliminations and other [Member]
Revenues									(1,595)	(1,356)	(1,167)
Operating Income (Loss)									$ (932)	$ (236)	$ (81)

Selected Quarterly Financial Data - Unaudited (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Selected Quarterly Financial Information [Abstract]
Revenues	$ 19,551	$ 19,496	$ 19,634	$ 18,365	$ 18,044	$ 16,510	$ 16,705	$ 15,242	$ 77,046	$ 66,501	$ 59,837
Gross margin	4,817	5,285	5,221	4,658	4,297	3,974	4,283	3,962
Net income attributable to common shareowners	$ 1,143	$ 1,148	$ 1,900	$ 1,346	$ 686	$ 1,238	$ 2,048	$ 1,297	$ 5,537	$ 5,269	$ 4,552
Earnings Per Share of Common Stock - Basic and Diluted:
Basic - net income	$ 1.33	$ 1.34	$ 2.22	$ 1.58	$ 0.83	$ 1.56	$ 2.59	$ 1.64	$ 6.48	$ 6.58	$ 5.76
Diluted - net income	$ 1.32	$ 1.33	$ 2.20	$ 1.56	$ 0.83	$ 1.54	$ 2.56	$ 1.62	$ 6.41	$ 6.50	$ 5.70

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Leases (Details) - USD ($) $ in Millions	12 Months Ended
Leases (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease, Expense	$ 720
Operating Lease, Payments	746
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	416
Operating Lease, Right-of-Use Asset	2,599	$ 2,600	$ 0
Operating Lease, Liability, Current	544		0
Operating Lease, Liability, Noncurrent	2,144		0
Operating Lease, Liability	$ 2,688	$ 2,700
Operating Lease, Weighted Average Remaining Lease Term	7 years 10 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	3.50%
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 641
Lessee, Operating Lease, Liability, Payments, Due Year Two	542
Lessee, Operating Lease, Liability, Payments, Due Year Three	410
Lessee, Operating Lease, Liability, Payments, Due Year Four	306
Lessee, Operating Lease, Liability, Payments, Due Year Five	234
Lessee, Operating Lease, Liability, Payments, Due after Year Five	1,014
Lessee, Operating Lease, Liability, Payments, Due	3,147
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	459
Operating Leases, Future Minimum Payments Due			2,900
Operating Leases, Future Minimum Payments Due, Next Twelve Months			683
Operating Leases, Future Minimum Payments, Due in Two Years			544
Operating Leases, Future Minimum Payments, Due in Three Years			407
Operating Leases, Future Minimum Payments, Due in Four Years			301
Operating Leases, Future Minimum Payments, Due in Five Years			235
Operating Leases, Future Minimum Payments, Due Thereafter			$ 746
Accrued Liabilities [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Liability, Current	$ 544

Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for Doubtful Accounts and Other Customer Financing Activity [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	$ 389	$ 488	$ 456	$ 467
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense	84	54	88
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	113	37	82
Valuation Allowances and Reserves, Additions for Adjustments	(70)	15	(17)
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	616	605	582	$ 545
Valuation Allowances and Reserves Charged to Income Tax Expense	117	61	45
SEC Schedule, 12-09, Valuation Allowances and Reserves, Business Acquired	2	25
Valuation Allowances and Reserves Credited to Income Tax Expense	15	25	29
Valuation Allowances and Reserves, Additions for Adjustments	$ (93)	$ (38)	$ 21