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Document and Entity Information - USD ($)	9 Months Ended
Document and Entity Information - USD ($)	Sep. 30, 2018	Jun. 30, 2018
Document and Entity Information [Abstract]
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Registrant Name	UNITED TECHNOLOGIES CORP /DE/
Entity Central Index Key	0000101829
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Public Float		$ 99,985,852,722
Entity Common Stock, Shares Outstanding	800,984,201
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes

Condensed Consolidated Statement of Operations Condensed Consolidated Statement of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Sales:
Revenues	$ 16,510	$ 15,062	$ 48,457	$ 44,157
Costs and Expenses:
Research and development	586	592	1,729	1,797
Selling, general and administrative	1,681	1,582	5,151	4,709
Total costs and expenses	14,803	13,280	43,118	38,912
Other income, net	131	250	1,303	1,095
Operating profit	1,838	2,032	6,642	6,340
Non-service pension cost (benefit)	(188)	(131)	(571)	(380)
Interest expense, net	258	223	721	662
Income from operations before income taxes	1,768	1,940	6,492	6,058
Income tax expense	419	506	1,636	1,624
Net Income from operations	1,349	1,434	4,856	4,434
Less: Noncontrolling interest in subsidiaries' earnings from operations	111	104	273	279
Income from continuing operations attributable to common shareowners	1,238	1,330	4,583	4,155
Net income attributable to common shareowners	$ 1,238	$ 1,330	$ 4,583	$ 4,155
Earnings Per Share of Common Stock - Basic:
Income from continuing operations attributable to common shareowners	$ 1.56	$ 1.69	$ 5.80	$ 5.26
Net income attributable to common shareowners	1.56	1.69	5.80	5.26
Earnings Per Share of Common Stock - Diluted:
Income from continuing operations attributable to common shareowners	1.54	1.67	5.72	5.20
Net income attributable to common shareowners	$ 1.54	$ 1.67	$ 5.72	$ 5.20
Product [Member]
Net Sales:
Revenues	$ 11,254	$ 10,378	$ 33,032	$ 30,676
Costs and Expenses:
Cost of Goods and Services Sold	9,342	7,800	26,512	23,068
Service [Member]
Net Sales:
Revenues	5,256	4,684	15,425	13,481
Costs and Expenses:
Cost of Goods and Services Sold	$ 3,194	$ 3,306	$ 9,726	$ 9,338

Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net Income from operations	$ 1,349	$ 1,434	$ 4,856	$ 4,434
Foreign currency translation adjustments
Foreign currency translation adjustments arising during period	(185)	514	(378)	909
Less: Reclassification adjustments for loss on sale of an investment in a foreign entity recognized in Other income, net	0	3	3	3
Foreign currency translation adjustments	(185)	511	(381)	906
Tax (benefit) expense	(4)	0	(60)	0
Foreign Currency Translation Adjustments, Net of Tax	(181)	511	(321)	906
Pension and post-retirement benefit plans
Pension and post-retirement benefit plans adjustments during the period	(17)	(50)	9	(54)
Amortization of actuarial loss, prior service cost and transition obligation	86	132	262	395
Total pension and post-retirement benefit plans, before tax	(69)	(82)	(271)	(341)
Tax expense	(15)	(53)	(64)	(149)
Pension and Other Postretirement Benefit Plans, Net of Tax	(54)	(29)	(207)	(192)
Unrealized gain (loss) on available-for-sale securities
Unrealized holding gain (loss) arising during period	0	19	0	17
Reclassification adjustments for gain included in Other income, net	0	138	0	545
Other Comprehensive Income (Loss), ASU 2016-01 adoption impact on Securities Arising During Period	0	0	(5)	0
Total unrealized gain (loss) on available for-sale securities, before tax	0	(119)	(5)	(528)
Tax expense (benefit)	0	(43)	0	(199)
Total unrealized gain (loss) on available for-sale securities, net of tax	0	(76)	(5)	(329)
Change in unrealized cash flow hedging
Unrealized cash flow hedging (loss) gain arising during the period	95	310	(105)	440
Gain (Loss) reclassified into Product Sales	(2)	24	26	14
Total unrealized (loss) gain on cash-flow hedging, before tax	97	286	(131)	426
Tax expense (benefit)	28	73	(28)	105
Total unrealized gain (loss) on cash-flow hedging, net of tax	69	213	(103)	321
Other comprehensive income (loss), net of tax	(58)	677	(222)	1,090
Comprehensive income	1,291	2,111	4,634	5,524
Less: Comprehensive income attributable to noncontrolling interest	92	144	249	362
Comprehensive income attributable to common shareowners	$ 1,199	$ 1,967	$ 4,385	$ 5,162

Condensed Consolidated Balance Sheet - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Cash and cash equivalents	$ 13,799	$ 8,985
Accounts receivable, net	12,550	12,595
Contract with Customer, Asset, Net, Current	3,450	0
Inventories and contracts in progress, net	9,068	9,881
Other assets, current	1,337	1,397
Total Current Assets	40,204	32,858
Customer financing assets	3,143	2,372
Future income tax benefits	1,701	1,723
Fixed assets	21,956	21,364
Less: Accumulated depreciation	11,720	11,178
Fixed assets, net	10,236	10,186
Goodwill	27,679	27,910
Intangible assets, net	15,701	15,883
Restricted Cash, Noncurrent	9,205	5
Other assets	7,070	5,983
Total Assets	114,939	96,920
Short-term borrowings	1,576	392
Accounts payable	10,509	9,579
Accrued liabilities	8,867	12,316
Contract with Customer, Liability, Current	5,460	0
Long-term debt currently due	92	2,104
Total Current Liabilities	26,504	24,391
Long-term debt	38,275	24,989
Future pension and postretirement benefit obligations	2,412	3,036
Other long-term liabilities	13,373	12,952
Total Liabilities	80,564	65,368
Commitments and contingent liabilities (Note 15)
Redeemable noncontrolling interest	125	131
Common Stock	17,869	17,574
Treasury Stock	35,667	35,596
Retained earnings	57,706	55,242
Unearned ESOP shares	79	85
Accumulated other comprehensive loss	(7,723)	(7,525)
Total Shareowners' Equity	32,106	29,610
Noncontrolling interest	2,144	1,811
Total Equity	34,250	31,421
Total Liabilities and Equity	$ 114,939	$ 96,920

Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Statement of Cash Flows [Abstract]
Net Income from operations	$ 4,856	$ 4,434
Adjustments to reconcile income from continuing operations to net cash flows provided by operating activities of continuing operations:
Depreciation and amortization	1,766	1,582
Deferred income tax provision	70	724
Stock compensation cost	181	145
Gain on sale of Taylor Company	799	0
Change in:
Accounts receivable	2,379	1,051
Contract assets, current	892	0
Inventories and contracts in progress	991	1,249
Other current assets	(262)	(78)
Accounts payable and accrued liabilities	3,044	1,864
Contract liabilities, current	313	0
Global pension contributions	72	2,008
Canadian Government Settlement	(221)	(246)
Other operating activities, net	821	1,163
Net cash flows provided by operating activities of continuing operations	4,317	3,110
Investing Activities of Continuing Operations:
Capital expenditures	1,122	1,214
Investments in businesses	177	196
Dispositions of businesses	1,099	37
Proceeds from the sale of the investment in Watsco Inc.	0	596
Increase in customer financing assets	453	525
Increase in collaboration intangible assets	302	290
Payments (receipts) from settlements of derivative contracts	(71)	183
Other investing activities, net	135	(117)
Net cash flows used in investing activities of continuing operations	(1,019)	(1,658)
Financing Activities of Continuing Operations:
Proceeds from Issuance of Long-term Debt	13,409	4,044
Repayments of Long-term Debt	2,093	1,587
Increase in short-term borrowings, net	1,228	400
Proceeds from Common Stock issued under employee stock plans	33	25
Dividends paid on Common Stock	1,606	1,541
Repurchase of Common Stock	72	1,430
Other financing activities, net	(60)	(204)
Net cash flows provided by (used in) financing activities of continuing operations	10,839	(293)
Effect of Exchange Rate on Cash and Cash Equivalents [Abstract]
Effect of foreign exchange rate changes on cash and cash equivalents	(111)	208
Net increase in cash and cash equivalents	14,026	1,367
Cash and Cash Equivalents, beginning of year	9,018	7,189
Cash and Cash Equivalents, end of period	23,044	8,556
Restricted Cash	9,245	33
Cash and cash equivalents, end of period	$ 13,799	$ 8,523

Introduction to Notes to Condensed Consolidated Financial Statements (Unaudited) Introduction	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Introduction of Notes to Condensed Consolidated Financial Statements	The Condensed Consolidated Financial Statements at September 30, 2018 and for the quarter and nine months ended September 30, 2018 and 2017 are unaudited, but in the opinion of management include all adjustments (consisting only of normal recurring adjustments) necessary for a fair statement of the results for the interim periods. The results reported in these Condensed Consolidated Financial Statements should not necessarily be taken as indicative of results that may be expected for the entire year. The financial information included herein should be read in conjunction with the financial statements and notes in our Annual Report to Shareowners (2017 Annual Report) incorporated by reference in our Annual Report on Form 10-K for calendar year 2017 (2017 Form 10-K).

Acquisitions, Dispositions, Goodwill and Other Intangible Assets

9 Months Ended

Sep. 30, 2018

Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]

Acquisitions, Dispositions, Goodwill and Other Intangible Assets [Text Block]

Acquisitions, Dispositions, Goodwill and Other Intangible Assets

Business Acquisitions and Dispositions. During the nine months ended September 30, 2018, our investment in business acquisitions was $177 million, and primarily consisted of an acquisition at Pratt & Whitney. On June 21, 2018, UTC Climate, Controls & Security completed its sale of Taylor Company for proceeds of $1.0 billion resulting in a pre-tax gain of $799 million ($591 million after tax).

On September 4, 2017, we announced that we had entered into a merger agreement with Rockwell Collins, Inc. (Rockwell Collins), under which we agreed to acquire Rockwell Collins. Under the terms of the merger agreement, each Rockwell Collins shareowner will receive $93.33 per share in cash and a fraction of a share of UTC common stock equal to the quotient obtained by dividing $46.67 by the average of the volume-weighted average prices per share of UTC common stock on the NYSE on each of the 20 consecutive trading days ending with the trading day immediately prior to the closing date, (the “UTC Stock Price”), subject to adjustment based on a two-way collar mechanism as described below (the “Stock Consideration”). The cash and UTC stock payable in exchange for each such share of Rockwell Collins common stock are collectively the “Merger Consideration.” The fraction of a share of UTC common stock into which each such share of Rockwell Collins common stock will be converted is the “Exchange Ratio.” The Exchange Ratio will be determined based upon the UTC Stock Price. If the UTC Stock Price is greater than $107.01 but less than $124.37, the Exchange Ratio will be equal to the quotient of (i) $46.67 divided by (ii) the UTC Stock Price, which, in each case, will result in the Stock Consideration having a value equal to $46.67. If the UTC Stock Price is less than or equal to $107.01 or greater than or equal to $124.37, then a two-way collar mechanism will apply, pursuant to which, (x) if the UTC Stock Price is greater than or equal to $124.37, the Exchange Ratio will be fixed at 0.37525 and the value of the Stock Consideration will be greater than $46.67, and (y) if the UTC Stock Price is less than or equal to $107.01, the Exchange Ratio will be fixed at 0.43613 and the value of the Stock Consideration will be less than $46.67. On January 11, 2018, the merger was approved by Rockwell Collins' shareowners. We currently expect that the merger will be completed in the fourth quarter of 2018, subject to customary closing conditions, including the receipt of required regulatory approvals.

We anticipate that approximately $15 billion will be required to pay the aggregate cash portion of the Merger Consideration which will be funded by cash on hand. On August 16, 2018 we issued $11 billion of aggregate principal notes (refer to Note 5) for net proceeds of $10.9 billion of which $9.2 billion is specifically designated to fund the cash portion of the Merger Consideration and related fees, expenses and other amounts. Therefore, $9.2 billion of the net proceeds from the issuance have been classified as restricted cash as of September 30, 2018.

In connection with the merger agreement with Rockwell Collins announced on September 4, 2017, we entered into a $6.5 billion 364-day unsecured bridge loan credit agreement that would have been funded only to the extent certain anticipated debt issuances were not completed prior to the completion of the merger. The unsecured bridge loan credit agreement was terminated on August 16, 2018 upon issuance of the $11 billion of aggregate principal notes described above. We expect to assume approximately $7 billion of Rockwell Collins' outstanding debt upon completion of the merger.

As has been previously disclosed, the Company is continuing a strategic review of its portfolio of businesses. There can be no assurance as to the outcome of any such process or that any such process will result in a transaction, or if a transaction is undertaken, as to its terms or timing.

Goodwill. Changes in our goodwill balances for the nine months ended September 30, 2018 were as follows:



(dollars in millions)	Balance as of January 1, 2018		Goodwill Resulting from Business Combinations		Foreign Currency Translation and Other			Balance as of September 30, 2018
Otis	$	1,737	$	6	$	(42	)	$	1,701
UTC Climate, Controls & Security	10,009		1		(237		)	9,773
Pratt & Whitney	1,511		58		(2		)	1,567
UTC Aerospace Systems	14,650		—		(35		)	14,615
Total Segments	27,907		65		(316		)	27,656
Eliminations and other	3		20		—			23
Total	$	27,910	$	85	$	(316	)	$	27,679

The $316 million net reduction in goodwill within Foreign Currency Translation and Other includes a $151 million reduction of goodwill attributable to UTC Climate, Controls & Security's sale of Taylor Company. The $20 million increase in goodwill within Eliminations and other is due to an acquisition of a digital analytics company.

Intangible Assets. Identifiable intangible assets are comprised of the following:



	September 30, 2018					December 31, 2017
(dollars in millions)	Gross Amount		Accumulated Amortization			Gross Amount		Accumulated Amortization
Amortized:
Service portfolios	$	2,181	$	(1,604	)	$	2,178	$	(1,534	)
Patents and trademarks	362		(232		)	399		(233		)
Collaboration intangible assets	4,413		(573		)	4,109		(384		)
Customer relationships and other	13,493		(4,413		)	13,352		(4,100		)
	20,449		(6,822		)	20,038		(6,251		)
Unamortized:
Trademarks and other	2,074		—			2,096		—
Total	$	22,523	$	(6,822	)	$	22,134	$	(6,251	)

Customer relationship intangible assets include payments made to our customers to secure certain contractual rights. Such payments are capitalized when distinct rights are obtained and sufficient incremental cash flows to support the recoverability of the assets have been established. Otherwise, the applicable portion of the payments is expensed. We amortize these intangible assets based on the underlying pattern of economic benefit, which may result in an amortization method other than straight-line. In the aerospace industry, amortization based on the pattern of economic benefit generally results in lower amortization expense during the development period with amortization expense increasing as programs enter full production and aftermarket cycles. If a pattern of economic benefit cannot be reliably determined, a straight-line amortization method is used. We classify amortization of such payments as a reduction of sales. The collaboration intangible assets are amortized based upon the pattern of economic benefits as represented by the underlying cash flows.

Amortization of intangible assets for the quarter and nine months ended September 30, 2018 was $225 million and $680 million, respectively, compared with $211 million and $626 million for the same periods of 2017. The following is the expected amortization of intangible assets for the years 2018 through 2023, which reflects the pattern of expected economic benefit on certain aerospace intangible assets.



(dollars in millions)	Remaining 2018		2019		2020		2021		2022		2023
Amortization expense	$	222	$	877	$	875	$	904	$	924	$	920

Revenue Recognition Revenue Recognition (Notes)

9 Months Ended

Sep. 30, 2018

Revenue Recognition [Abstract]

Revenue Recognition [Text Block]

Revenue Recognition

ASU 2014-09 and its related amendments (collectively, the New Revenue Standard) are effective for reporting periods beginning after December 15, 2017, and interim periods therein. We adopted the New Revenue Standard 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.

Revenue Recognition Accounting Policy Summary. We account for revenue in accordance with Accounting Standards Codification (ASC) Topic 606: Revenue from Contracts with Customers. 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.

Point in time revenue recognition. Timing of the satisfaction of performance obligations varies across our businesses due to our diverse product and service mix, customer base, and contractual terms. 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 product maintenance and aftermarket services. 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 are delivered to the customer. 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 are delivered to the customer. 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.

The New Revenue Standard changed the revenue recognition practices for a number of revenue streams across our businesses, although the most significant impacts are concentrated in our aerospace units. Several of our businesses which previously accounted for revenue on a point in time basis are now required to use an over-time revenue recognition model when their contracts meet one or more of the mandatory criteria established in the New Revenue Standard. Revenue is now recognized on an over-time basis using an input method for repair contracts within Otis and UTC Climate, Controls & Security; certain U.S. Government and commercial aerospace equipment contracts; and aerospace aftermarket service work. We measure progress toward completion for these contracts using costs incurred to date relative to total estimated costs at completion. Incurred costs represent work performed, which corresponds with and best depicts the transfer of control to the customer. For these businesses, unrecognized sales related to the satisfied portion of the performance obligations of contracts in process as of the date of adoption of the New Revenue Standard of approximately $220 million were recorded through retained earnings. The ongoing effect on our reported revenues of recognizing revenue on an over-time basis within these businesses is not expected to be materially different than the previous revenue recognition method.

In addition to the foregoing, our aerospace businesses, in certain cases, also changed the timing of manufacturing cost recognition and certain engineering and development costs. In most circumstances, our commercial aerospace businesses identify the performance obligation as the individual OEM unit; revenue and cost to manufacture each unit are recognized upon OEM unit delivery. Under the prior accounting, the unit of accounting was the contract and early-contract OEM unit costs in excess of the average unit costs expected over the contract were capitalized and amortized over lower-cost units later in the contract. With the adoption of the New Revenue Standard, deferred unit costs in excess of the contract average of $438 million as of January 1, 2018 were eliminated through retained earnings, and as such, will not be amortized into future earnings.

Under the New Revenue Standard, costs incurred for engineering and development of aerospace products under contracts with customers must be capitalized as contract fulfillment costs, to the extent recoverable from the associated contract margin, and subsequently amortized as the OEM products are delivered to the customer. Under prior accounting, we generally expensed costs of engineering and development of aerospace products. The new standard also requires that customer funding of OEM product engineering and development be deferred in instances where intellectual property does not transfer to the customer and recognized as revenue when the OEM products are delivered. Engineering and development costs which do not qualify for capitalization as contract fulfillment costs are expensed as incurred. Prior to the New Revenue Standard, any customer funding received for such development efforts was recognized when earned, with the corresponding costs recognized as cost of sales.

With the adoption of the New Revenue Standard, we capitalized engineering and development costs of approximately $700 million as contract fulfillment cost assets through retained earnings as of January 1, 2018. We also established previously recognized customer funding of approximately $850 million as a contract liability through retained earnings as of the adoption date.

We expect the New Revenue Standard will have an immaterial impact on our 2018 net income. Adoption of the New Revenue Standard has resulted in Statement of Operations classification changes between Net Sales, Cost of sales, Research & development, and Other income. The New Revenue Standard also resulted in the establishment of Contract asset and Contract liability balance sheet accounts, and in the reclassification of balances to these new accounts from Accounts receivable, Inventories and contracts in progress, net, and Accrued liabilities. In addition to the following disclosures, Note 16 provides incremental disclosures required by the New Revenue Standard, including disaggregation of revenue into categories that depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors.

The following schedules quantify the impact of the New Revenue Standard on the statement of operations for the quarter and nine months ended September 30, 2018. The effect of the new standard represents the increase (decrease) in the line item based on the adoption of the New Revenue Standard.



(dollars in millions)	Quarter Ended September 30, 2018, under previous standard			Effect of the New Revenue Standard			Quarter Ended September 30, 2018 as reported
Net Sales:
Product sales	$	11,228		$	26		$	11,254
Service sales	5,233			23			5,256
	16,461			49			16,510
Costs and Expenses:
Cost of products sold	9,389			(47		)	9,342
Cost of services sold	3,172			22			3,194
Research and development	614			(28		)	586
Selling, general and administrative	1,681			—			1,681
	14,856			(53		)	14,803
Other income, net	132			(1		)	131
Operating profit	1,737			101			1,838
Non-service pension (benefit)	(188		)	—			(188		)
Interest expense, net	258			—			258
Income from operations before income taxes	1,667			101			1,768
Income tax expense	394			25			419
Net income from operations	1,273			76			1,349
Less: Noncontrolling interest in subsidiaries' earnings from operations	113			(2		)	111
Net income attributable to common shareowners	$	1,160		$	78		$	1,238



(dollars in millions)	Nine Months Ended September 30, 2018, under previous standard			Effect of the New Revenue Standard			Nine Months Ended September 30, 2018 as reported
Net Sales:
Product sales	$	32,801		$	231		$	33,032
Service sales	15,201			224			15,425
	48,002			455			48,457
Costs and Expenses:
Cost of products sold	26,250			262			26,512
Cost of services sold	9,568			158			9,726
Research and development	1,794			(65		)	1,729
Selling, general and administrative	5,151			—			5,151
	42,763			355			43,118
Other income, net	1,307			(4		)	1,303
Operating profit	6,546			96			6,642
Non-service pension (benefit)	(571		)	—			(571		)
Interest expense, net	721			—			721
Income from operations before income taxes	6,396			96			6,492
Income tax expense	1,612			24			1,636
Net income from operations	4,784			72			4,856
Less: Noncontrolling interest in subsidiaries' earnings from operations	269			4			273
Net income attributable to common shareowners	$	4,515		$	68		$	4,583

The New Revenue Standard resulted in an increase to Product and Service sales and Cost of products and services sold primarily due to the change to an over-time basis using an input method revenue model for certain U.S Government and commercial aerospace equipment contracts, and aerospace aftermarket service work at Pratt & Whitney and UTC Aerospace Systems. The New Revenue Standard also resulted in an increase in Cost of products sold during the nine months ended September 30, 2018 related to the timing of manufacturing cost recognition. During the quarter ended September 30, 2018, Cost of products sold were lower under the New Revenue Standard due to a change in the contract average unit costs during the quarter.

The lower amounts of research and development expense recognized under the New Revenue Standard reflect the capitalization of costs of engineering and development of aerospace products as contract fulfillment costs under contracts with customers.

The following schedule quantifies the impact of the New Revenue Standard on our balance sheet as of September 30, 2018.



(dollars in millions)	September 30, 2018 under previous standard		Effect of the New Revenue Standard			September 30, 2018 as reported
Assets
Accounts receivable, net	$	13,988	$	(1,438	)	$	12,550
Contract assets, current	—		3,450			3,450
Inventories	11,337		(2,269		)	9,068
Other assets, current	1,305		32			1,337
Future income tax benefits	1,669		32			1,701
Intangible assets, net	15,771		(70		)	15,701
Other assets	5,987		1,083			7,070

Liabilities and Equity
Accrued liabilities	$	14,153	$	(5,286	)	$	8,867
Contract liabilities, current	—		5,460			5,460
Other long term liabilities	12,357		1,016			13,373
Noncontrolling interest	2,138		6			2,144

Retained earnings	58,118		(412		)	57,706

The decrease in Retained earnings of $412 million in the table above reflects $480 million of adjustments to the balance sheet as of January 1, 2018, resulting from the adoption of the New Revenue Standard partially offset by $68 million higher reported net income under the New Revenue Standard during 2018. The declines in Accounts receivable, net, Inventories, Other assets, current, and Intangible assets, net, reflect reclassifications to contract assets, and specifically for Inventories, earlier recognition of costs of products sold for contracts requiring an over-time method of revenue recognition. The increase in Other assets reflects the establishment of non-current contract assets and contract fulfillment cost assets.

The decline in accrued liabilities is primarily due to the reclassification of payments from customers in advance of work performed as contract liabilities. The Other long term liabilities increase primarily reflects the establishment of non-current contract liabilities for certain customer funding of OEM product engineering and development, which will be recognized as revenue when the OEM products are delivered to the customer.

Contract Assets and Liabilities. 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 September 30, 2018 are as follows:



(dollars in millions)	September 30, 2018
Contract assets, current	$	3,450
Contract assets, noncurrent (included within Other assets)	1,075
Total contract assets	4,525
Contract liabilities, current	(5,460		)
Contract liabilities, noncurrent (included within Other long-term liabilities)	(5,044		)
Total contract liabilities	(10,504		)
Net contract liabilities	$	(5,979	)

Under the New Revenue Standard, during the nine months ended September 30, 2018, net contract liabilities increased to $5,979 million. This reflects the establishment of $6,365 million of net contract liabilities upon the adoption, and $21,093 million of advance payments from customers and reclassifications of contract assets to receivables upon billing during the period. These increases were partially offset by the liquidation of beginning of period contract liabilities of $1,978 million as a result of revenue recognition, and by $19,499 million of revenue recognition within the period. The remaining change is primarily attributable to the impact of foreign currency exchange rate changes on the balance of contract assets and liabilities offset by net contract liabilities acquired through business combinations.

Remaining performance obligations ("RPO") are the aggregate amount of total contract transaction price that is unsatisfied or partially unsatisfied. As of September 30, 2018, our total RPO is $106.8 billion. Of this total, we expect approximately 42% will be recognized as sales over the following 24 months.

Earnings Per Share

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Earnings Per Share



	Quarter Ended September 30,				Nine Months Ended September 30,
(dollars in millions, except per share amounts; shares in millions)	2018		2017		2018		2017
Net income attributable to common shareowners	$	1,238	$	1,330	$	4,583	$	4,155
Basic weighted average number of shares outstanding	791.3		788.3		790.6		790.3
Stock awards and equity units (share equivalent)	10.5		8.8		10.1		9.1
Diluted weighted average number of shares outstanding	801.8		797.1		800.7		799.4
Earnings Per Share of Common Stock:
Basic	$	1.56	$	1.69	$	5.80	$	5.26
Diluted	$	1.54	$	1.67	$	5.72	$	5.20

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 the quarter and nine months ended September 30, 2018, the number of stock awards excluded from the computation was approximately 5.0 million and 5.2 million, respectively. For the quarter and nine months ended September 30, 2017, the number of stock awards excluded from the computation was approximately 5.8 million and 6.4 million, respectively.

Inventories and Contracts in Progress

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Inventories and Contracts in Progress [Text Block]

Inventories and Contracts in Progress



(dollars in millions)	September 30, 2018		December 31, 2017
Raw materials	$	2,444	$	2,038
Work-in-process	2,292		3,366
Finished goods	4,332		3,845
Contracts in progress	—		10,205
	9,068		19,454
Less:
Progress payments, secured by lien, on U.S. Government contracts	—		(236		)
Billings on contracts in progress	—		(9,337		)
	$	9,068	$	9,881

Inventories as of December 31, 2017 included capitalized contract development costs of $127 million related to certain aerospace programs at UTC Aerospace Systems. Upon adoption of the New Revenue Standard, these costs are recorded as contract fulfillment costs included in Other assets.

Prior to the adoption of the New Revenue Standard, within our commercial aerospace business, inventory costs attributable to new engine offerings were recognized based on the average cost per unit expected over the life of each contract using the units-of-delivery method of percentage of completion accounting. Under this method, costs of initial engine deliveries in excess of the projected contract per unit average cost were capitalized and these capitalized amounts were subsequently expensed as additional engines were delivered for engines with costs below the projected contract per unit average cost over the life of the contract. As of December 31, 2017, inventory included $438 million of such capitalized amounts. Upon adoption of the New Revenue Standard, these amounts are no longer included in inventory. In addition, amounts previously reported as Contracts in progress have been reclassified as contract assets in accordance with the New Revenue Standard.

Borrowings and Lines of Credit

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Borrowings and Lines of Credit [Text Block]

Borrowings and Lines of Credit



(dollars in millions)	September 30, 2018		December 31, 2017
Commercial paper	$	1,380	$	300
Other borrowings	196		92
Total short-term borrowings	$	1,576	$	392

At September 30, 2018, we had revolving credit agreements with various banks permitting aggregate borrowings of up to $4.35 billion, pursuant to a $2.20 billion revolving credit agreement and a $2.15 billion multicurrency revolving credit agreement, both of which expire in August 2021. As of September 30, 2018, there were no borrowings under either of these agreements. The undrawn portions of these revolving credit agreements are also available to serve as backup facilities for the issuance of commercial paper. As of September 30, 2018, our maximum commercial paper borrowing limit was $4.35 billion. Commercial paper borrowings at September 30, 2018 include approximately €750 million ($881 million) of euro-denominated commercial paper. 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.

On August 16, 2018, we issued $1.0 billion aggregate principal amount of 3.350% notes due 2021, $2.25 billion aggregate principal amount of 3.650% notes due 2023, $1.5 billion aggregate principal amount of 3.950% notes due 2025, $3.0 billion aggregate principal amount of 4.125% notes due 2028, $750 million aggregate principal amount of 4.450% notes due 2038, $1.75 billion aggregate principal amount of 4.625% notes due 2048, and $750 million aggregate principal amount of floating rate notes due 2021. The net proceeds received from the issuance of the notes due 2021, notes due 2023, notes due 2025, notes due 2028, notes due 2038 and the floating rate notes due 2021 are specifically designated to finance payment obligations with respect to the cash consideration and related fees, expenses and other amounts in connection with the acquisition of Rockwell Collins. If either the acquisition of Rockwell Collins does not occur on or before July 15, 2019 or we notify the trustee that we will not pursue the acquisition of Rockwell Collins, we will be required to redeem the mandatorily redeemable notes then outstanding at a redemption price equal to 101% of the principal amount of such notes plus accrued and unpaid interest (the special mandatory redemption).

We expect to use the proceeds of the notes due 2048 for general corporate purposes which may include the repayment of debt, including outstanding commercial paper. The notes due 2048 are not subject to the special mandatory redemption.

On May 18, 2018, we issued €750 million aggregate principal amount of 1.150% notes due 2024, €500 million aggregate principal amount of 2.150% notes maturing 2030 and €750 million aggregate principal amount of floating rate notes maturing 2020. The net proceeds received from these debt issuances were used for general corporate purposes.

On May 4, 2018, we repaid at maturity approximately $1.1 billion aggregate principal amount of 1.778% junior subordinated notes.

On February 1, 2018, we repaid at maturity the $99 million 6.80% notes and on February 22, 2018, we repaid at maturity the €750 million EURIBOR plus 0.80% floating rate notes.

In connection with the merger agreement with Rockwell Collins announced on September 4, 2017, we entered into a $6.5 billion 364-day unsecured bridge loan credit agreement that would have been funded only to the extent certain anticipated debt issuances were not completed prior to the completion of the merger. This unsecured bridge loan credit agreement was terminated on August 16, 2018 upon issuance of the $11 billion of aggregate principal notes described above. See Note 1 for additional discussion.

Long-term debt consisted of the following:



(dollars in millions)	September 30, 2018		December 31, 2017
6.800% notes due 2018	$	—	$	99
EURIBOR plus 0.800% floating rate notes due 2018 (€750 million principal value) ²	—		890
1.778% junior subordinated notes due 2018	—		1,100
LIBOR plus 0.350% floating rate notes due 2019 ³	350		350
1.500% notes due 2019 ¹	650		650
EURIBOR plus 0.15% floating rate notes due 2019 (€750 million principal value) ²	881		890
8.875% notes due 2019	271		271
4.875% notes due 2020 ¹	171		171
4.500% notes due 2020 ¹	1,250		1,250
1.900% notes due 2020 ¹	1,000		1,000
EURIBOR plus 0.20% floating rate notes due 2020 (€750 million principal value) ²	881		—
8.750% notes due 2021	250		250
3.350% notes due 2021¹	1,000		—
LIBOR plus 0.650% floating rate notes due 2021 ^1,3	750		—
1.950% notes due 2021 ¹	750		750
1.125% notes due 2021 (€950 million principal value) ¹	1,117		1,127
2.300% notes due 2022 ¹	500		500
3.100% notes due 2022 ¹	2,300		2,300
1.250% notes due 2023 (€750 million principal value) ¹	881		890
3.650% notes due 2023 ¹	2,250		—
2.800% notes due 2024 ¹	800		800
1.150% notes due 2024 (€750 million principal value) ¹	881		—
3.950% notes due 2025 ¹	1,500		—
1.875% notes due 2026 (€500 million principal value) ¹	588		593
2.650% notes due 2026 ¹	1,150		1,150
3.125% notes due 2027 ¹	1,100		1,100
7.100% notes due 2027	141		141
6.700% notes due 2028	400		400
4.125% notes due 2028 ¹	3,000		—
7.500% notes due 2029 ¹	550		550
2.150% notes due 2030 (€500 million principal value) ¹	588		—
5.400% notes due 2035 ¹	600		600



6.050% notes due 2036 ¹	600			600
6.800% notes due 2036 ¹	134			134
7.000% notes due 2038	159			159
6.125% notes due 2038 ¹	1,000			1,000
4.450% notes due 2038 ¹	750			—
5.700% notes due 2040 ¹	1,000			1,000
4.500% notes due 2042 ¹	3,500			3,500
4.150% notes due 2045 ¹	850			850
3.750% notes due 2046 ¹	1,100			1,100
4.050% notes due 2047 ¹	600			600
4.625% notes due 2048 ¹	1,750			—
Project financing obligations	250			158
Other (including capitalized leases)	230			195
Total principal long-term debt	38,473			27,118
Other (fair market value adjustments and discounts)	(106		)	(25		)
Total long-term debt	38,367			27,093
Less: current portion	92			2,104
Long-term debt, net of current portion	$	38,275		$	24,989


1	We may redeem these notes at our option pursuant to their terms.


2	The three-month EURIBOR rate as of September 30, 2018 was approximately -0.318%. 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.


3	The three-month LIBOR rate as of September 30, 2018 was approximately 2.398%.

The average maturity of our long-term debt at September 30, 2018 is approximately 11 years. The average interest expense rate on our total borrowings for the quarter and nine months ended September 30, 2018 and 2017 were as follows:



	Quarter Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Average interest expense rate	3.6	%	3.6	%	3.5	%	3.6	%

We have an existing universal shelf registration statement filed with the Securities and Exchange Commission (SEC) for an indeterminate amount of equity and debt securities for future issuances, subject to our internal limitations on the amount of equity and debt to be issued under this shelf registration statement.

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income Taxes 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). In accordance with Staff Accounting Bulletin 118 (SAB 118) issued on December 22, 2017, the U.S. income tax amounts recorded attributable to the TCJA’s deemed repatriation provision, the revaluation of U.S. deferred taxes and the tax consequences relating to states with current conformity to the Internal Revenue Code are provisional amounts. Due to the enactment date and tax complexities of the TCJA, the Company has not completed its accounting related to these items. Prior to enactment of the TCJA, with few exceptions, U.S. income taxes had not been provided on undistributed earnings of UTC's international subsidiaries as the Company had intended to reinvest such earnings permanently outside the U.S. or to repatriate such earnings only when it was tax effective to do so. The Company continues to evaluate the impact of the TCJA on its existing accounting position related to the undistributed earnings. Due to the inherent complexities in determining any incremental U.S. Federal and State taxes and the non-U.S. taxes that may be due if all of these earnings were remitted to the U.S. and as provided for by SAB 118 this evaluation has not yet been completed and no provisional amount has been recorded in regard to the undistributed amounts. After completing its evaluation, the Company will accrue any additional taxes due on previously undistributed earnings to be distributed in the future. The Company will continue to accumulate and refine the relevant data and computational elements needed to finalize its accounting for the effects of the TCJA by December 22, 2018. 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 2006. 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. It is reasonably possible that a net reduction within the range of $40 million to $610 million of unrecognized tax benefits may occur within the next 12 months as a result of additional worldwide uncertain tax positions, the closure of tax statutes, or the revaluation of current uncertain tax positions arising from the issuance of legislation, regulatory or other guidance or developments in examinations, in appeals, or in the courts. The range of potential change includes provisional amounts related to the TCJA based on currently available information. See Note 15, 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. The Examination Division of the Internal Revenue Service is currently auditing UTC tax years 2014, 2015 and 2016, and the audit is expected to conclude within the next 12 months.

Employee Benefit Plans

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Pension and Other Postretirement Benefits Disclosure [Text Block]

Employee Benefit Plans

Pension and Postretirement Plans. We sponsor both funded and unfunded domestic and foreign defined pension and other postretirement benefit plans, and defined contribution plans.

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 or items 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 condensed consolidated statement of operations was as follows:



	Quarter Ended September 30, 2017
(dollars in millions)	Previously Reported		Effect of Change Higher/(Lower)			As Revised
Cost of product sold	$	7,750	$	50		$	7,800
Cost of services sold	3,293		13			3,306
Research and development	582		10			592
Selling, general and administrative	1,524		58			1,582
Non-service pension (benefit)	—		(131		)	(131		)



	Nine Months Ended September 30, 2017
(dollars in millions)	Previously Reported		Effect of Change Higher/(Lower)			As Revised
Cost of product sold	$	22,920	$	148		$	23,068
Cost of services sold	9,300		38			9,338
Research and development	1,768		29			1,797
Selling, general and administrative	4,544		165			4,709
Non-service pension (benefit)	—		(380		)	(380		)

Contributions to our plans were as follows:



	Quarter Ended September 30,				Nine Months Ended September 30,
(dollars in millions)	2018		2017		2018		2017
Defined benefit plans	$	13	$	1,929	$	72	$	2,008
Defined contribution plans	97		86		296		262

There were no contributions to our domestic defined benefit pension plans in the quarter and nine months ended September 30, 2018. There was a $1.9 billion contribution to our domestic defined benefit pension plans in the quarter and nine months ended September 30, 2017. The following table illustrates the components of net periodic benefit cost for our defined pension and other postretirement benefit plans:



	Pension Benefits Quarter Ended September 30,						Other Postretirement Benefits Quarter Ended September 30,
(dollars in millions)	2018			2017			2018			2017
Service cost	$	94		$	94		$	—		$	—
Interest cost	274			281			7			9
Expected return on plan assets	(558		)	(555		)	—			—
Amortization of prior service credit	(11		)	(9		)	—			(1		)
Recognized actuarial net loss (gain)	100			144			(3		)	(2		)
Net settlement and curtailment loss	3			2			—			—
Total net periodic benefit (income) cost	$	(98	)	$	(43	)	$	4		$	6



	Pension Benefits Nine Months Ended September 30,						Other Postretirement Benefits Nine Months Ended September 30,
(dollars in millions)	2018			2017			2018			2017
Service cost	$	280		$	280		$	1		$	2
Interest cost	831			838			19			22
Expected return on plan assets	(1,683		)	(1,636		)	—			—
Amortization of prior service credit	(31		)	(27		)	(2		)	(1		)
Recognized actuarial net loss (gain)	302			430			(7		)	(7		)
Net settlement and curtailment loss	—			1			—			—
Total net periodic benefit (income) cost	$	(301	)	$	(114	)	$	11		$	16

Restructuring and Other Costs

9 Months Ended

Sep. 30, 2018

Restructuring and Related Activities [Abstract]

Restructuring and Other Costs [Text Block]

Restructuring Costs

During the nine months ended September 30, 2018, we recorded net pre-tax restructuring costs totaling $186 million for new and ongoing restructuring actions. We recorded charges in the segments as follows:



(dollars in millions)
Otis	$	50
UTC Climate, Controls & Security	52
Pratt & Whitney	3
UTC Aerospace Systems	77
Eliminations and other	4
Total	$	186

Restructuring charges incurred during the nine months ended September 30, 2018 primarily relate to actions initiated during 2018 and 2017, and were recorded as follows:



(dollars in millions)
Cost of sales	$	112
Selling, general and administrative	76
Non-service pension (benefit)	(2		)
Total	$	186

2018 Actions. During the nine months ended September 30, 2018, we recorded net pre-tax restructuring costs of $97 million, comprised of $47 million in cost of sales, $52 million in selling, general and administrative expenses, and $(2) million in non-service pension benefit. The 2018 actions relate to ongoing cost reduction efforts, including workforce reductions and the consolidation of field and manufacturing operations.

We are targeting to complete the majority of the remaining workforce and facility related cost reduction actions during 2018 and 2019. No specific plans for other significant actions have been finalized at this time. The following table summarizes the accrual balance and utilization for the 2018 restructuring actions for the quarter and nine months ended September 30, 2018:



(dollars in millions)	Severance			Facility Exit, Lease Termination and Other Costs			Total
Quarter Ended September 30, 2018
Restructuring accruals at June 30, 2018	$	48		$	—		$	48
Net pre-tax restructuring costs	19			5			24
Utilization and foreign exchange	(19		)	(2		)	(21		)
Balance at September 30, 2018	$	48		$	3		$	51

Nine Months Ended September 30, 2018
Net pre-tax restructuring costs	$	90		$	7		$	97
Utilization and foreign exchange	(42		)	(4		)	(46		)
Balance at September 30, 2018	$	48		$	3		$	51

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



(dollars in millions)	Expected Costs		Costs Incurred Quarter Ended March 31, 2018			Costs Incurred Quarter Ended June 30, 2018			Costs Incurred Quarter Ended September 30, 2018			Remaining Costs at September 30, 2018
Otis	$	40	$	(9	)	$	(18	)	$	(2	)	$	11
UTC Climate, Controls & Security	97		(1		)	(23		)	(14		)	59
Pratt & Whitney	3		—			(3		)	—			—
UTC Aerospace Systems	36		—			(15		)	(8		)	13
Eliminations and other	4		(2		)	(2		)	—			—
Total	$	180	$	(12	)	$	(61	)	$	(24	)	$	83

2017 Actions. During the nine months ended September 30, 2018, we recorded net pre-tax restructuring costs totaling $76 million for restructuring actions initiated in 2017, including $56 million in cost of sales and $20 million in selling, general and administrative expenses. The 2017 actions relate to ongoing cost reduction efforts, including workforce reductions, consolidation of field and manufacturing operations, and costs to exit legacy programs. The following table summarizes the accrual balances and utilization for the 2017 restructuring actions for the quarter and nine months ended September 30, 2018:



(dollars in millions)	Severance			Facility Exit, Lease Termination and Other Costs			Total
Quarter Ended September 30, 2018
Restructuring accruals at June 30, 2018	$	73		$	(3	)	$	70
Net pre-tax restructuring costs	3			6			9
Utilization and foreign exchange	(19		)	(8		)	(27		)
Balance at September 30, 2018	$	57		$	(5	)	$	52

Nine Months Ended September 30, 2018
Restructuring accruals at December 31, 2017	$	84		$	1		$	85
Net pre-tax restructuring costs	50			26			76
Utilization and foreign exchange	(77		)	(32		)	(109		)
Balance at September 30, 2018	$	57		$	(5	)	$	52

The following table summarizes expected, incurred and remaining costs for the 2017 restructuring actions by segment:



(dollars in millions)	Expected Costs		Costs Incurred in 2017			Costs Incurred Quarter Ended March 31, 2018			Costs Incurred Quarter Ended June 30, 2018			Costs Incurred Quarter Ended September 30, 2018			Remaining Costs at September 30, 2018
Otis	$	69	$	(43	)	$	(15	)	$	(4	)	$	(1	)	$	6
UTC Climate, Controls & Security	78		(76		)	(7		)	5			1			1
Pratt & Whitney	7		(7		)	—			—			—			—
UTC Aerospace Systems	207		(43		)	(29		)	(17		)	(9		)	109
Eliminations and other	7		(7		)	—			—			—			—
Total	$	368	$	(176	)	$	(51	)	$	(16	)	$	(9	)	$	116

2016 and Prior Actions. During the nine months ended September 30, 2018, we recorded net pre-tax restructuring costs totaling $13 million for restructuring actions initiated in 2016 and prior. As of September 30, 2018, we have approximately $83 million of accrual balances remaining related to 2016 and prior actions.

Financial Instruments

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments [Text Block]

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 $20.0 billion and $19.1 billion at September 30, 2018 and December 31, 2017, respectively.

The following table summarizes the fair value and presentation in the Condensed Consolidated Balance Sheets for derivative instruments as of September 30, 2018 and December 31, 2017:



(dollars in millions)	Balance Sheet Location	September 30, 2018			December 31, 2017
Derivatives designated as hedging instruments:
Foreign exchange contracts	Asset Derivatives:
	Other assets, current	$	36		$	77
	Other assets	46			101
	Total asset derivatives	$	82		$	178
	Liability Derivatives:
	Accrued liabilities	(25		)	(10		)
	Other long-term liabilities	(35		)	(8		)
	Total liability derivatives	$	(60	)	$	(18	)
Derivatives not designated as hedging instruments:
Foreign exchange contracts	Asset Derivatives:
	Other assets, current	48			70
	Other assets	20			5
	Total asset derivatives	$	68		$	75
	Liability Derivatives:
	Accrued liabilities	(55		)	(57		)
	Other long-term liabilities	(3		)	(3		)
	Total liability derivatives	$	(58	)	$	(60	)

The effect of cash flow hedging relationships on accumulated other comprehensive income for the quarter and nine months ended September 30, 2018 and 2017 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.



	Quarter Ended September 30,					Nine Months Ended September 30,
(dollars in millions)	2018		2017			2018			2017
Gain (loss) recorded in Accumulated other comprehensive loss	$	95	$	310		$	(105	)	$	440
Loss (gain) reclassified from Accumulated other comprehensive loss into Product sales	2		(24		)	(26		)	(14		)

The table above reflects the effect of cash flow hedging relationships on the Condensed Consolidated Statements of Operations for the quarter and nine months ended September 30, 2018 and 2017. 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 €4.95 billion of euro-denominated long-term debt and €750 million of euro-denominated commercial paper borrowings outstanding, which qualify as a net investment hedge against our investments in European businesses. As of September 30, 2018, the net investment hedge is deemed to be effective.

Assuming current market conditions continue, a $10 million pre-tax gain 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 September 30, 2018, all derivative contracts accounted for as cash flow hedges will mature by October 2022.

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



	Quarter Ended September 30,				Nine Months Ended September 30,
(dollars in millions)	2018		2017		2018		2017
Foreign exchange contracts	$	16	$	10	$	86	$	50

Fair Value Measurements

9 Months Ended

Sep. 30, 2018

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 Condensed Consolidated Balance Sheet as of September 30, 2018 and December 31, 2017:



September 30, 2018 (dollars in millions)	Total			Level 1		Level 2			Level 3
Recurring fair value measurements:
Available-for-sale securities	$	42		$	42	$	—		$	—
Derivative assets	150			—		150			—
Derivative liabilities	(118		)	—		(118		)	—



December 31, 2017 (dollars in millions)	Total			Level 1		Level 2			Level 3
Recurring fair value measurements:
Available-for-sale securities	$	64		$	64	$	—		$	—
Derivative assets	253			—		253			—
Derivative liabilities	(78		)	—		(78		)	—

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 September 30, 2018, there were no significant transfers in or out of Level 1 and Level 2.

As of September 30, 2018, 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 Condensed Consolidated Balance Sheet at September 30, 2018 and December 31, 2017:



	September 30, 2018						December 31, 2017
(dollars in millions)	Carrying Amount			Fair Value			Carrying Amount			Fair Value
Long-term receivables	$	128		$	125		$	127		$	121
Customer financing notes receivable	458			433			609			596
Short-term borrowings	(1,576		)	(1,576		)	(392		)	(392		)
Long-term debt (excluding capitalized leases)	(38,344		)	(38,803		)	(27,067		)	(29,180		)
Long-term liabilities	(295		)	(263		)	(362		)	(330		)

The following table provides the valuation hierarchy classification of assets and liabilities that are not carried at fair value in our Condensed Consolidated Balance Sheet at September 30, 2018 and December 31, 2017:



	September 30, 2018
(dollars in millions)	Total			Level 1		Level 2			Level 3
Long-term receivables	$	125		$	—	$	125		$	—
Customer financing notes receivable	433			—		433			—
Short-term borrowings	(1,576		)	—		(1,380		)	(196		)
Long-term debt (excluding capitalized leases)	(38,803		)	—		(38,465		)	(338		)
Long-term liabilities	(263		)	—		(263		)	—



	December 31, 2017
(dollars in millions)	Total			Level 1		Level 2			Level 3
Long-term receivables	$	121		$	—	$	121		$	—
Customer financing notes receivable	596			—		596			—
Short-term borrowings	(392		)	—		(300		)	(92		)
Long-term debt (excluding capitalized leases)	(29,180		)	—		(28,970		)	(210		)
Long-term liabilities	(330		)	—		(330		)	—

We had commercial aerospace financing and other contractual commitments totaling approximately $15.1 billion and $15.3 billion as of September 30, 2018 and December 31, 2017, respectively, related to commercial aircraft and certain contractual rights to provide product on new aircraft platforms. Associated risks on these commitments from changes in interest rates are mitigated because interest rates are variable during the commitment term and are set at the date of funding based on current market conditions, the fair value of the underlying collateral and the credit worthiness of the customers. As a result, the fair value of these financings is expected to equal the amounts funded.

- 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

Long-Term Financing Receivables

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Long-Term Financing Receivables [Text Block]

Long-Term Financing Receivables

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

Prior to the adoption of the New Revenue Standard, long-term trade accounts receivable, including unbilled receivables related to long-term aftermarket contracts, were principally amounts arising from the sale of goods and the delivery of services with a contract maturity date or realization period of greater than one year and were recognized as "Other assets" in our Condensed Consolidated Balance Sheet. With the adoption of the New Revenue Standard, these unbilled receivables are classified as non-current contract assets and are recognized as "Other assets" in our Condensed Consolidated Balance Sheet. Notes and leases receivable represent notes and lease receivables other than receivables related to operating leases, and are recognized as "Customer financing assets" in our Condensed Consolidated Balance Sheet. The following table summarizes the balance by class of aerospace business related long-term receivables as of September 30, 2018 and December 31, 2017.



(dollars in millions)	September 30, 2018		December 31, 2017
Long-term trade accounts receivable	$	64	$	973
Notes and leases receivable	430		424
Total long-term receivables	$	494	$	1,397

Customer credit ratings range from customers with an extremely strong capacity to meet financial obligations to customers whose uncollateralized receivables are 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. The decrease in Long-term trade accounts receivable from December 31, 2017 is primarily driven by the reclassification of unbilled receivables related to long-term aftermarket contracts to contract assets in accordance with the New Revenue Standard as described above. Based upon the customer credit ratings, approximately $140 million and $170 million of our total long-term receivables were considered to bear high credit risk as of September 30, 2018 and December 31, 2017, respectively.

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 $18 million and $17 million as of September 30, 2018 and December 31, 2017, are individually evaluated for impairment. At September 30, 2018 and December 31, 2017, we did not have any significant balances that are considered to be delinquent, on non-accrual status, past due 90 days or more, or are considered to be unrecoverable.

Shareowners' Equity and Noncontrolling Interest

9 Months Ended

Sep. 30, 2018

Stockholders' Equity Note [Abstract]

Shareowners' Equity and Noncontrolling Interest [Text Block]

Shareowners' Equity and Noncontrolling Interest

A summary of the changes in shareowners' equity and noncontrolling interest comprising total equity for the quarter and nine months ended September 30, 2018 and 2017 is provided below:



	Quarter Ended September 30,
	2018									2017
(dollars in millions)	Share-owners' Equity			Non-controlling Interest			Total Equity			Share-owners' Equity			Non-controlling Interest			Total Equity
Equity, beginning of period	$	31,364		$	1,982		$	33,346		$	28,442		$	1,713		$	30,155
Comprehensive income (loss) for the period:
Net income	1,238			111			1,349			1,330			104			1,434
Total other comprehensive (loss) income	(39		)	(19		)	(58		)	637			40			677
Total comprehensive income for the period	1,199			92			1,291			1,967			144			2,111
Common Stock issued under employee plans	125			—			125			86			—			86
Common Stock repurchased	(23		)	—			(23		)	(60		)	—			(60		)
Dividends on Common Stock	(536		)	—			(536		)	(533		)	—			(533		)
Dividends on ESOP Common Stock	(18		)	—			(18		)	(19		)	—			(19		)
Dividends attributable to noncontrolling interest	—			(73		)	(73		)	—			(105		)	(105		)
Capital contributions	—			138			138			—			54			54
Sale of subsidiary shares from noncontrolling interest, net	—			—			—			5			9			14
Acquisition of noncontrolling interest	—			—			—			—			14			14
Redeemable noncontrolling interest fair value adjustment	(6		)	—			(6		)	(4		)	—			(4		)
Other	1			5			6			(3		)	(19		)	(22		)
Equity, end of period	$	32,106		$	2,144		$	34,250		$	29,881		$	1,810		$	31,691



	Nine Months Ended September 30,
	2018									2017
(dollars in millions)	Share-owners' Equity			Non-controlling Interest			Total Equity			Share-owners' Equity			Non-controlling Interest			Total Equity
Equity, beginning of period	$	29,610		$	1,811		$	31,421		$	27,579		$	1,590		$	29,169
Comprehensive income (loss) for the period:
Net income	4,583			273			4,856			4,155			279			4,434
Total other comprehensive (loss) income	(198		)	(24		)	(222		)	1,007			83			1,090
Total comprehensive income for the period	4,385			249			4,634			5,162			362			5,524
Common Stock issued under employee plans	306			—			306			256			—			256
Common Stock repurchased	(75		)	—			(75		)	(1,430		)	—			(1,430		)
Dividends on Common Stock	(1,606		)	—			(1,606		)	(1,541		)	—			(1,541		)
Dividends on ESOP Common Stock	(53		)	—			(53		)	(54		)	—			(54		)
Dividends attributable to noncontrolling interest	—			(212		)	(212		)	—			(217		)	(217		)
Capital contributions	—			300			300			—			97			97
(Purchase) sale of subsidiary shares from noncontrolling interest, net	(1		)	(1		)	(2		)	4			4			8
Acquisition of noncontrolling interest	—			—			—			—			14			14
Disposition of noncontrolling interest	—			(8		)	(8		)	—			—			—
Redeemable noncontrolling interest fair value adjustment	(8		)	—			(8		)	(99		)	—			(99		)
New Revenue Standard adoption impact	(480		)	—			(480		)	—			—			—
Other	28			5			33			4			(40		)	(36		)
Equity, end of period	$	32,106		$	2,144		$	34,250		$	29,881		$	1,810		$	31,691

A summary of the changes in each component of Accumulated other comprehensive (loss) income, net of tax for the quarter and nine months ended September 30, 2018 and 2017 is provided below:



(dollars in millions)	Foreign Currency Translation			Defined Benefit Pension and Post- retirement Plans			Unrealized Gains (Losses) on Available-for-Sale Securities			Unrealized Hedging (Losses) Gains			Accumulated Other Comprehensive (Loss) Income
Quarter Ended September 30, 2018
Balance at June 30, 2018	$	(3,085	)	$	(4,499	)	$	—		$	(100	)	$	(7,684	)
Other comprehensive (loss) income before reclassifications, net	(166		)	(17		)	—			95			(88		)
Amounts reclassified, pre-tax	—			86			—			2			88
Tax expense (benefit)	4			(15		)	—			(28		)	(39		)
Balance at September 30, 2018	$	(3,247	)	$	(4,445	)	$	—		$	(31	)	$	(7,723	)

Nine Months Ended September 30, 2018
Balance at December 31, 2017	$	(2,950	)	$	(4,652	)	$	5		$	72		$	(7,525	)
Other comprehensive (loss) income before reclassifications, net	(354		)	9			—			(105		)	(450		)
Amounts reclassified, pre-tax	(3		)	262			—			(26		)	233
Tax expense (benefit)	60			(64		)	—			28			24
ASU 2016-01 adoption impact	—			—			(5		)	—			(5		)
Balance at September 30, 2018	$	(3,247	)	$	(4,445	)	$	—		$	(31	)	$	(7,723	)



(dollars in millions)	Foreign Currency Translation			Defined Benefit Pension and Post- retirement Plans			Unrealized Gains (Losses) on Available-for-Sale Securities			Unrealized Hedging (Losses) Gains			Accumulated Other Comprehensive (Loss) Income
Quarter Ended September 30, 2017
Balance at June 30, 2017	$	(3,128	)	$	(4,882	)	$	100		$	(54	)	$	(7,964	)
Other comprehensive income (loss) before reclassifications, net	474			(37		)	12			232			681
Amounts reclassified, pre-tax	(3		)	132			(138		)	(24		)	(33		)
Tax (benefit) expense reclassified	—			(66		)	50			5			(11		)
Balance at September 30, 2017	$	(2,657	)	$	(4,853	)	$	24		$	159		$	(7,327	)

Nine Months Ended September 30, 2017
Balance at December 31, 2016	$	(3,480	)	$	(5,045	)	$	353		$	(162	)	$	(8,334	)
Other comprehensive income (loss) before reclassifications, net	826			(39		)	11			332			1,130
Amounts reclassified, pre-tax	(3		)	395			(545		)	(14		)	(167		)
Tax (benefit) expense reclassified	—			(164		)	205			3			44
Balance at September 30, 2017	$	(2,657	)	$	(4,853	)	$	24		$	159		$	(7,327	)

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 (see Note 7 for additional details).

Amounts reclassified that relate to unrealized gains (losses) on available-for-sale securities, pre-tax includes approximately $500 million of previously unrealized gains reclassified to other income as a result of sales of significant investments in available-for-sale securities in the nine months ended September 30, 2017, including UTC Climate, Controls & Security's sale of investments in Watsco, Inc.

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 Condensed Consolidated Balance Sheet, between liabilities and equity, at the greater of redemption value or initial carrying value.

Variable Interest Entities

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Variable Interest Entity Disclosure [Text Block]

Variable Interest Entities

Pratt & Whitney holds a net 61% 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 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% net 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 Condensed Consolidated Balance Sheet are as follows:



(dollars in millions)	September 30, 2018		December 31, 2017
Current assets	$	5,423	$	3,976
Noncurrent assets	1,439		1,534
Total assets	$	6,862	$	5,510

Current liabilities	$	5,465	$	3,601
Noncurrent liabilities	1,951		2,086
Total liabilities	$	7,416	$	5,687

Guarantees

9 Months Ended

Sep. 30, 2018

Service and Product Warranties and Product Performance Guarantees [Abstract]

Guarantees [Text Block]

Guarantees

We extend a variety of financial, market value and product performance guarantees to third parties. There have been no material changes to financial guarantees outstanding since December 31, 2017. The changes in the carrying amount of service and product warranties and product performance guarantees for the nine months ended September 30, 2018 and 2017 are as follows:



(dollars in millions)	2018			2017
Balance as of January 1	$	1,146		$	1,199
Warranties and performance guarantees issued	472			221
Settlements made	(380		)	(194		)
Other	(8		)	21
Balance as of September 30	$	1,230		$	1,247

Contingent Liabilities	9 Months Ended
Contingent Liabilities	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities [Text Block]	Contingent Liabilities Summarized below are the matters previously described in Note 18 of the Notes to the Consolidated Financial Statements in our 2017 Annual Report, incorporated by reference in our 2017 Form 10-K, updated as applicable. 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 authorities with jurisdiction over our foreign operations. As described in Note 1 to the Consolidated Financial Statements in our 2017 Annual Report, 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. Additional information pertaining to environmental matters is included in Note 1 to the Consolidated Financial Statements in our 2017 Annual Report. 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 or of export 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 anti-bribery, 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 also 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 which recommend that certain contract prices should be reduced to comply with various government regulations, including because cost or pricing data we submitted in negotiation of the contract prices or cost accounting practices may not have conformed to government regulations, or that certain payments be delayed or withheld. Some of these audit reports involved substantial amounts. We have made voluntary refunds in those cases we believe appropriate, have settled some allegations and continue to litigate or challenge certain matters. 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 accrued the minimum amount. Legal Proceedings. Cost Accounting Standards Claim As previously disclosed, in December 2013, a Divisional Administrative Contracting Officer of the United States Defense Contract Management Agency asserted a claim against Pratt & Whitney to recover overpayments of approximately $177 million plus interest (approximately $80 million through September 30, 2018). 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. On March 18, 2014, Pratt & Whitney filed an appeal to the Armed Services Board of Contract Appeals. Pratt & Whitney’s appeal is still pending and we continue to believe the government’s claim is without merit. 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 $253 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 $139 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. Our estimated total liability to resolve all pending and unasserted potential future asbestos claims through 2059 is approximately $341 million and is principally recorded in Other long-term liabilities on our Condensed Consolidated Balance Sheet as of September 30, 2018. 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 $156 million, which is included primarily in Other assets on our Condensed Consolidated Balance Sheet as of September 30, 2018. 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 least annually, the Company evaluates all of these factors and, with input from an outside actuarial expert, makes any necessary adjustments to both our estimated asbestos liabilities and insurance recoveries. Other. As described in Note 14 of this Form 10-Q and Note 17 to the Consolidated Financial Statements in our 2017 Annual Report, 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. 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 instances, 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

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

Note 16: Segment Financial Data

Our operations are classified into four principal segments: Otis, UTC Climate, Controls & Security, Pratt & Whitney, and UTC Aerospace Systems. The segments are generally 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. As discussed in Note 7, 2017 amounts have been recast based on the adoption of ASU 2017-07.

Total sales by segment include inter-segment sales, which are generally made at prices approximating those that the selling entity is able to obtain on external sales. Results for the quarters ended September 30, 2018 and 2017 are as follows:



	Net Sales						Operating Profits						Operating Profit Margins
(dollars in millions)	2018			2017			2018			2017			2018		2017
Otis	$	3,223		$	3,156		$	486		$	550		15.1	%	17.4	%
UTC Climate, Controls & Security	4,880			4,688			844			794			17.3	%	16.9	%
Pratt & Whitney	4,789			3,871			109			188			2.3	%	4.9	%
UTC Aerospace Systems	3,955			3,637			610			572			15.4	%	15.7	%
Total segments	16,847			15,352			2,049			2,104			12.2	%	13.7	%
Eliminations and other	(337		)	(290		)	(102		)	32
General corporate expenses	—			—			(109		)	(104		)
Consolidated	$	16,510		$	15,062		$	1,838		$	2,032		11.1	%	13.5	%

Results for the nine months ended September 30, 2018 and 2017 are as follows:



	Net Sales						Operating Profits						Operating Profit Margins
(dollars in millions)	2018			2017			2018			2017			2018		2017
Otis	$	9,604		$	9,091		$	1,424		$	1,536		14.8	%	16.9	%
UTC Climate, Controls & Security	14,291			13,292			3,081			2,562			21.6	%	19.3	%
Pratt & Whitney	13,854			11,699			919			908			6.6	%	7.8	%
UTC Aerospace Systems	11,734			10,888			1,767			1,637			15.1	%	15.0	%
Total segments	49,483			44,970			7,191			6,643			14.5	%	14.8	%
Eliminations and other	(1,026		)	(813		)	(210		)	9
General corporate expenses	—			—			(339		)	(312		)
Consolidated	$	48,457		$	44,157		$	6,642		$	6,340		13.7	%	14.4	%

Geographic sales are attributed to the geographic regions based on their location of origin. Segment information for the quarter ended September 30, 2018 is as follows:



(dollars in millions)	Otis		UTC Climate, Controls & Security		Pratt & Whitney		UTC Aerospace Systems		Total
Primary Geographical Markets
United States	$	864	$	2,537	$	3,696	$	2,805	$	9,902
Europe	968		1,377		141		560		3,046
Asia Pacific	1,129		726		316		86		2,257
Other	262		240		636		504		1,642
Total segment	$	3,223	$	4,880	$	4,789	$	3,955	16,847
Eliminations and other									(337		)
Consolidated									$	16,510

Segment information for the nine months ended September 30, 2018 is as follows:



(dollars in millions)	Otis		UTC Climate, Controls & Security		Pratt & Whitney		UTC Aerospace Systems		Total
Primary Geographical Markets
United States	$	2,568	$	7,250	$	10,469	$	8,235	$	28,522
Europe	3,028		4,216		440		1,752		9,436
Asia Pacific	3,220		2,131		996		255		6,602
Other	788		694		1,949		1,492		4,923
Total segment	$	9,604	$	14,291	$	13,854	$	11,734	49,483
Eliminations and other									(1,026		)
Consolidated									$	48,457

Segment sales disaggregated by product type and product versus service for the quarter ended September 30, 2018 are as follows:



(dollars in millions)	Otis		UTC Climate, Controls & Security		Pratt & Whitney		UTC Aerospace Systems		Total
Product Type
Commercial and industrial, non aerospace	$	3,223	$	4,880	$	5	$	14	$	8,122
Commercial aerospace	—		—		3,421		3,031		6,452
Military aerospace	—		—		1,363		910		2,273
Total segment	$	3,223	$	4,880	$	4,789	$	3,955	16,847
Eliminations and other									(337		)
Consolidated									$	16,510

Sales Type
Product	$	1,448	$	4,106	$	2,703	$	3,297	$	11,554
Service	1,775		774		2,086		658		5,293
Total segment	$	3,223	$	4,880	$	4,789	$	3,955	16,847
Eliminations and other									(337		)
Consolidated									$	16,510

Segment sales disaggregated by product type and product versus service for the nine months ended September 30, 2018 are as follows:



(dollars in millions)	Otis		UTC Climate, Controls & Security		Pratt & Whitney		UTC Aerospace Systems		Total
Product Type
Commercial and industrial, non aerospace	$	9,604	$	14,291	$	31	$	44	$	23,970
Commercial aerospace	—		—		9,989		8,966		18,955
Military aerospace	—		—		3,834		2,724		6,558
Total segment	$	9,604	$	14,291	$	13,854	$	11,734	49,483
Eliminations and other									(1,026		)
Consolidated									$	48,457

Sales Type
Product	$	4,192	$	11,917	$	8,016	$	9,825	$	33,950
Service	5,412		2,374		5,838		1,909		15,533
Total segment	$	9,604	$	14,291	$	13,854	$	11,734	49,483
Eliminations and other									(1,026		)
Consolidated									$	48,457

Accounting Pronouncements	9 Months Ended
Accounting Pronouncements	Sep. 30, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements, Policy [Text Block]	Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The new standard establishes a right-of-use (ROU) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the Condensed Consolidated Statement of Operations. In addition, this standard 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. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. In July 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases. This ASU makes various targeted amendments to the leasing standard and we are evaluating this ASU in connection with adoption of the standard. In July 2018, the FASB issued ASU 2018-11, Leases (Topic 842): Targeted Improvements. This standard allows entities to initially apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. We will be adopting this alternative transition method when adopting the new leasing standard as of January 1, 2019. We expect that upon adoption of these standards, we will recognize ROU assets and lease liabilities and that the amounts will be material. We do not expect ASU 2016-02 to have a material impact on our cash flows or results of operations. 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 newly-enacted U.S. Tax Cuts and Jobs Act. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. We expect that upon adoption we will recognize a reclassification from AOCI to retained earnings that could be material, primarily related to pension. We are still evaluating the impact of our pending adoption of the new standard on our consolidated financial statements. We do not expect this ASU to have a material impact on our cash flows and results of operations. 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 includes updates to the disclosure requirements for fair value measurements including several additions, deletions and modifications to the disclosure requirements. The provisions of this ASU are effective for years beginning after December 15, 2019, with early adoption permitted. We are currently evaluating the impact of this ASU. 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 years beginning 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, 2020, with early adoption permitted. We are currently evaluating the impact of this ASU.

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

9 Months Ended

Sep. 30, 2018

Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]

Schedule of Goodwill [Table Text Block]

Changes in our goodwill balances for the nine months ended September 30, 2018 were as follows:



(dollars in millions)	Balance as of January 1, 2018		Goodwill Resulting from Business Combinations		Foreign Currency Translation and Other			Balance as of September 30, 2018
Otis	$	1,737	$	6	$	(42	)	$	1,701
UTC Climate, Controls & Security	10,009		1		(237		)	9,773
Pratt & Whitney	1,511		58		(2		)	1,567
UTC Aerospace Systems	14,650		—		(35		)	14,615
Total Segments	27,907		65		(316		)	27,656
Eliminations and other	3		20		—			23
Total	$	27,910	$	85	$	(316	)	$	27,679

Intangible Assets Disclosure [Table Text Block]

Identifiable intangible assets are comprised of the following:



	September 30, 2018					December 31, 2017
(dollars in millions)	Gross Amount		Accumulated Amortization			Gross Amount		Accumulated Amortization
Amortized:
Service portfolios	$	2,181	$	(1,604	)	$	2,178	$	(1,534	)
Patents and trademarks	362		(232		)	399		(233		)
Collaboration intangible assets	4,413		(573		)	4,109		(384		)
Customer relationships and other	13,493		(4,413		)	13,352		(4,100		)
	20,449		(6,822		)	20,038		(6,251		)
Unamortized:
Trademarks and other	2,074		—			2,096		—
Total	$	22,523	$	(6,822	)	$	22,134	$	(6,251	)

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

The following is the expected amortization of intangible assets for the years 2018 through 2023, which reflects the pattern of expected economic benefit on certain aerospace intangible assets.



(dollars in millions)	Remaining 2018		2019		2020		2021		2022		2023
Amortization expense	$	222	$	877	$	875	$	904	$	924	$	920

Revenue Recognition Contract Asset & Liability (Tables)

9 Months Ended

Sep. 30, 2018

Contract Asset and Liability [Abstract]

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



(dollars in millions)	September 30, 2018
Contract assets, current	$	3,450
Contract assets, noncurrent (included within Other assets)	1,075
Total contract assets	4,525
Contract liabilities, current	(5,460		)
Contract liabilities, noncurrent (included within Other long-term liabilities)	(5,044		)
Total contract liabilities	(10,504		)
Net contract liabilities	$	(5,979	)

Revenue Recognition Remaining Performance Obligations (Tables)	9 Months Ended
	Sep. 30, 2018
Remaining Performance Obligations [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]	Remaining performance obligations ("RPO") are the aggregate amount of total contract transaction price that is unsatisfied or partially unsatisfied. As of September 30, 2018, our total RPO is $106.8 billion. Of this total, we expect approximately 42% will be recognized as sales over the following 24 months.

Revenue Recognition Financial Statement Supplementals - Rev Rec (Tables)

9 Months Ended

Sep. 30, 2018

Financial Statement Supplementals - Rev Rec [Abstract]

Revenue Recognition, Policy [Policy Text Block]

Note 2: Revenue Recognition

Additional Financial Information Disclosure [Text Block]



(dollars in millions)	Quarter Ended September 30, 2018, under previous standard			Effect of the New Revenue Standard			Quarter Ended September 30, 2018 as reported
Net Sales:
Product sales	$	11,228		$	26		$	11,254
Service sales	5,233			23			5,256
	16,461			49			16,510
Costs and Expenses:
Cost of products sold	9,389			(47		)	9,342
Cost of services sold	3,172			22			3,194
Research and development	614			(28		)	586
Selling, general and administrative	1,681			—			1,681
	14,856			(53		)	14,803
Other income, net	132			(1		)	131
Operating profit	1,737			101			1,838
Non-service pension (benefit)	(188		)	—			(188		)
Interest expense, net	258			—			258
Income from operations before income taxes	1,667			101			1,768
Income tax expense	394			25			419
Net income from operations	1,273			76			1,349
Less: Noncontrolling interest in subsidiaries' earnings from operations	113			(2		)	111
Net income attributable to common shareowners	$	1,160		$	78		$	1,238



(dollars in millions)	Nine Months Ended September 30, 2018, under previous standard			Effect of the New Revenue Standard			Nine Months Ended September 30, 2018 as reported
Net Sales:
Product sales	$	32,801		$	231		$	33,032
Service sales	15,201			224			15,425
	48,002			455			48,457
Costs and Expenses:
Cost of products sold	26,250			262			26,512
Cost of services sold	9,568			158			9,726
Research and development	1,794			(65		)	1,729
Selling, general and administrative	5,151			—			5,151
	42,763			355			43,118
Other income, net	1,307			(4		)	1,303
Operating profit	6,546			96			6,642
Non-service pension (benefit)	(571		)	—			(571		)
Interest expense, net	721			—			721
Income from operations before income taxes	6,396			96			6,492
Income tax expense	1,612			24			1,636
Net income from operations	4,784			72			4,856
Less: Noncontrolling interest in subsidiaries' earnings from operations	269			4			273
Net income attributable to common shareowners	$	4,515		$	68		$	4,583

The following schedule quantifies the impact of the New Revenue Standard on our balance sheet as of September 30, 2018.



(dollars in millions)	September 30, 2018 under previous standard		Effect of the New Revenue Standard			September 30, 2018 as reported
Assets
Accounts receivable, net	$	13,988	$	(1,438	)	$	12,550
Contract assets, current	—		3,450			3,450
Inventories	11,337		(2,269		)	9,068
Other assets, current	1,305		32			1,337
Future income tax benefits	1,669		32			1,701
Intangible assets, net	15,771		(70		)	15,701
Other assets	5,987		1,083			7,070

Liabilities and Equity
Accrued liabilities	$	14,153	$	(5,286	)	$	8,867
Contract liabilities, current	—		5,460			5,460
Other long term liabilities	12,357		1,016			13,373
Noncontrolling interest	2,138		6			2,144

Retained earnings	58,118		(412		)	57,706

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

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



	Quarter Ended September 30,				Nine Months Ended September 30,
(dollars in millions, except per share amounts; shares in millions)	2018		2017		2018		2017
Net income attributable to common shareowners	$	1,238	$	1,330	$	4,583	$	4,155
Basic weighted average number of shares outstanding	791.3		788.3		790.6		790.3
Stock awards and equity units (share equivalent)	10.5		8.8		10.1		9.1
Diluted weighted average number of shares outstanding	801.8		797.1		800.7		799.4
Earnings Per Share of Common Stock:
Basic	$	1.56	$	1.69	$	5.80	$	5.26
Diluted	$	1.54	$	1.67	$	5.72	$	5.20

Inventories and Contracts in Progress (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]



(dollars in millions)	September 30, 2018		December 31, 2017
Raw materials	$	2,444	$	2,038
Work-in-process	2,292		3,366
Finished goods	4,332		3,845
Contracts in progress	—		10,205
	9,068		19,454
Less:
Progress payments, secured by lien, on U.S. Government contracts	—		(236		)
Billings on contracts in progress	—		(9,337		)
	$	9,068	$	9,881

Borrowings and Lines of Credit (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Schedule of Short-Term Debt [Table Text Block]



(dollars in millions)	September 30, 2018		December 31, 2017
Commercial paper	$	1,380	$	300
Other borrowings	196		92
Total short-term borrowings	$	1,576	$	392

Schedule of Long-term Debt [Table Text Block]

Long-term debt consisted of the following:



(dollars in millions)	September 30, 2018		December 31, 2017
6.800% notes due 2018	$	—	$	99
EURIBOR plus 0.800% floating rate notes due 2018 (€750 million principal value) ²	—		890
1.778% junior subordinated notes due 2018	—		1,100
LIBOR plus 0.350% floating rate notes due 2019 ³	350		350
1.500% notes due 2019 ¹	650		650
EURIBOR plus 0.15% floating rate notes due 2019 (€750 million principal value) ²	881		890
8.875% notes due 2019	271		271
4.875% notes due 2020 ¹	171		171
4.500% notes due 2020 ¹	1,250		1,250
1.900% notes due 2020 ¹	1,000		1,000
EURIBOR plus 0.20% floating rate notes due 2020 (€750 million principal value) ²	881		—
8.750% notes due 2021	250		250
3.350% notes due 2021¹	1,000		—
LIBOR plus 0.650% floating rate notes due 2021 ^1,3	750		—
1.950% notes due 2021 ¹	750		750
1.125% notes due 2021 (€950 million principal value) ¹	1,117		1,127
2.300% notes due 2022 ¹	500		500
3.100% notes due 2022 ¹	2,300		2,300
1.250% notes due 2023 (€750 million principal value) ¹	881		890
3.650% notes due 2023 ¹	2,250		—
2.800% notes due 2024 ¹	800		800
1.150% notes due 2024 (€750 million principal value) ¹	881		—
3.950% notes due 2025 ¹	1,500		—
1.875% notes due 2026 (€500 million principal value) ¹	588		593
2.650% notes due 2026 ¹	1,150		1,150
3.125% notes due 2027 ¹	1,100		1,100
7.100% notes due 2027	141		141
6.700% notes due 2028	400		400
4.125% notes due 2028 ¹	3,000		—
7.500% notes due 2029 ¹	550		550
2.150% notes due 2030 (€500 million principal value) ¹	588		—
5.400% notes due 2035 ¹	600		600



6.050% notes due 2036 ¹	600			600
6.800% notes due 2036 ¹	134			134
7.000% notes due 2038	159			159
6.125% notes due 2038 ¹	1,000			1,000
4.450% notes due 2038 ¹	750			—
5.700% notes due 2040 ¹	1,000			1,000
4.500% notes due 2042 ¹	3,500			3,500
4.150% notes due 2045 ¹	850			850
3.750% notes due 2046 ¹	1,100			1,100
4.050% notes due 2047 ¹	600			600
4.625% notes due 2048 ¹	1,750			—
Project financing obligations	250			158
Other (including capitalized leases)	230			195
Total principal long-term debt	38,473			27,118
Other (fair market value adjustments and discounts)	(106		)	(25		)
Total long-term debt	38,367			27,093
Less: current portion	92			2,104
Long-term debt, net of current portion	$	38,275		$	24,989


1	We may redeem these notes at our option pursuant to their terms.


2	The three-month EURIBOR rate as of September 30, 2018 was approximately -0.318%. 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.


3	The three-month LIBOR rate as of September 30, 2018 was approximately 2.398%.

Schedule of Weighted average interest rates [Table Text Block]

The average interest expense rate on our total borrowings for the quarter and nine months ended September 30, 2018 and 2017 were as follows:



	Quarter Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Average interest expense rate	3.6	%	3.6	%	3.5	%	3.6	%

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

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Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]



	Quarter Ended September 30, 2017
(dollars in millions)	Previously Reported		Effect of Change Higher/(Lower)			As Revised
Cost of product sold	$	7,750	$	50		$	7,800
Cost of services sold	3,293		13			3,306
Research and development	582		10			592
Selling, general and administrative	1,524		58			1,582
Non-service pension (benefit)	—		(131		)	(131		)



	Nine Months Ended September 30, 2017
(dollars in millions)	Previously Reported		Effect of Change Higher/(Lower)			As Revised
Cost of product sold	$	22,920	$	148		$	23,068
Cost of services sold	9,300		38			9,338
Research and development	1,768		29			1,797
Selling, general and administrative	4,544		165			4,709
Non-service pension (benefit)	—		(380		)	(380		)

Contributions to our plans were as follows:



	Quarter Ended September 30,				Nine Months Ended September 30,
(dollars in millions)	2018		2017		2018		2017
Defined benefit plans	$	13	$	1,929	$	72	$	2,008
Defined contribution plans	97		86		296		262



	Pension Benefits Quarter Ended September 30,						Other Postretirement Benefits Quarter Ended September 30,
(dollars in millions)	2018			2017			2018			2017
Service cost	$	94		$	94		$	—		$	—
Interest cost	274			281			7			9
Expected return on plan assets	(558		)	(555		)	—			—
Amortization of prior service credit	(11		)	(9		)	—			(1		)
Recognized actuarial net loss (gain)	100			144			(3		)	(2		)
Net settlement and curtailment loss	3			2			—			—
Total net periodic benefit (income) cost	$	(98	)	$	(43	)	$	4		$	6



	Pension Benefits Nine Months Ended September 30,						Other Postretirement Benefits Nine Months Ended September 30,
(dollars in millions)	2018			2017			2018			2017
Service cost	$	280		$	280		$	1		$	2
Interest cost	831			838			19			22
Expected return on plan assets	(1,683		)	(1,636		)	—			—
Amortization of prior service credit	(31		)	(27		)	(2		)	(1		)
Recognized actuarial net loss (gain)	302			430			(7		)	(7		)
Net settlement and curtailment loss	—			1			—			—
Total net periodic benefit (income) cost	$	(301	)	$	(114	)	$	11		$	16

Restructuring and Other Costs (Tables)

9 Months Ended

Sep. 30, 2018

YTD Current and Prior Year Actions [Member]

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	$	50
UTC Climate, Controls & Security	52
Pratt & Whitney	3
UTC Aerospace Systems	77
Eliminations and other	4
Total	$	186

Restructuring charges incurred during the nine months ended September 30, 2018 primarily relate to actions initiated during 2018 and 2017, and were recorded as follows:



(dollars in millions)
Cost of sales	$	112
Selling, general and administrative	76
Non-service pension (benefit)	(2		)
Total	$	186

Current Year Actions [Member]

Restructuring Cost and Reserve [Line Items]

Schedule of Restructuring and Related Costs [Table Text Block]

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



(dollars in millions)	Expected Costs		Costs Incurred Quarter Ended March 31, 2018			Costs Incurred Quarter Ended June 30, 2018			Costs Incurred Quarter Ended September 30, 2018			Remaining Costs at September 30, 2018
Otis	$	40	$	(9	)	$	(18	)	$	(2	)	$	11
UTC Climate, Controls & Security	97		(1		)	(23		)	(14		)	59
Pratt & Whitney	3		—			(3		)	—			—
UTC Aerospace Systems	36		—			(15		)	(8		)	13
Eliminations and other	4		(2		)	(2		)	—			—
Total	$	180	$	(12	)	$	(61	)	$	(24	)	$	83

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

The following table summarizes the accrual balance and utilization for the 2018 restructuring actions for the quarter and nine months ended September 30, 2018:



(dollars in millions)	Severance			Facility Exit, Lease Termination and Other Costs			Total
Quarter Ended September 30, 2018
Restructuring accruals at June 30, 2018	$	48		$	—		$	48
Net pre-tax restructuring costs	19			5			24
Utilization and foreign exchange	(19		)	(2		)	(21		)
Balance at September 30, 2018	$	48		$	3		$	51

Nine Months Ended September 30, 2018
Net pre-tax restructuring costs	$	90		$	7		$	97
Utilization and foreign exchange	(42		)	(4		)	(46		)
Balance at September 30, 2018	$	48		$	3		$	51

Prior Year Actions [Member]

Restructuring Cost and Reserve [Line Items]

Schedule of Restructuring and Related Costs [Table Text Block]

The following table summarizes expected, incurred and remaining costs for the 2017 restructuring actions by segment:



(dollars in millions)	Expected Costs		Costs Incurred in 2017			Costs Incurred Quarter Ended March 31, 2018			Costs Incurred Quarter Ended June 30, 2018			Costs Incurred Quarter Ended September 30, 2018			Remaining Costs at September 30, 2018
Otis	$	69	$	(43	)	$	(15	)	$	(4	)	$	(1	)	$	6
UTC Climate, Controls & Security	78		(76		)	(7		)	5			1			1
Pratt & Whitney	7		(7		)	—			—			—			—
UTC Aerospace Systems	207		(43		)	(29		)	(17		)	(9		)	109
Eliminations and other	7		(7		)	—			—			—			—
Total	$	368	$	(176	)	$	(51	)	$	(16	)	$	(9	)	$	116

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

he following table summarizes the accrual balances and utilization for the 2017 restructuring actions for the quarter and nine months ended September 30, 2018:



(dollars in millions)	Severance			Facility Exit, Lease Termination and Other Costs			Total
Quarter Ended September 30, 2018
Restructuring accruals at June 30, 2018	$	73		$	(3	)	$	70
Net pre-tax restructuring costs	3			6			9
Utilization and foreign exchange	(19		)	(8		)	(27		)
Balance at September 30, 2018	$	57		$	(5	)	$	52

Nine Months Ended September 30, 2018
Restructuring accruals at December 31, 2017	$	84		$	1		$	85
Net pre-tax restructuring costs	50			26			76
Utilization and foreign exchange	(77		)	(32		)	(109		)
Balance at September 30, 2018	$	57		$	(5	)	$	52

Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

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 Condensed Consolidated Balance Sheets for derivative instruments as of September 30, 2018 and December 31, 2017:



(dollars in millions)	Balance Sheet Location	September 30, 2018			December 31, 2017
Derivatives designated as hedging instruments:
Foreign exchange contracts	Asset Derivatives:
	Other assets, current	$	36		$	77
	Other assets	46			101
	Total asset derivatives	$	82		$	178
	Liability Derivatives:
	Accrued liabilities	(25		)	(10		)
	Other long-term liabilities	(35		)	(8		)
	Total liability derivatives	$	(60	)	$	(18	)
Derivatives not designated as hedging instruments:
Foreign exchange contracts	Asset Derivatives:
	Other assets, current	48			70
	Other assets	20			5
	Total asset derivatives	$	68		$	75
	Liability Derivatives:
	Accrued liabilities	(55		)	(57		)
	Other long-term liabilities	(3		)	(3		)
	Total liability derivatives	$	(58	)	$	(60	)

Reclassification out of Accumulated Other Comprehensive Income [Member]

Derivative Instruments, Gain (Loss) [Line Items]

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



	Quarter Ended September 30,					Nine Months Ended September 30,
(dollars in millions)	2018		2017			2018			2017
Gain (loss) recorded in Accumulated other comprehensive loss	$	95	$	310		$	(105	)	$	440
Loss (gain) reclassified from Accumulated other comprehensive loss into Product sales	2		(24		)	(26		)	(14		)

Other Income [Member]

Derivative Instruments, Gain (Loss) [Line Items]

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

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



	Quarter Ended September 30,				Nine Months Ended September 30,
(dollars in millions)	2018		2017		2018		2017
Foreign exchange contracts	$	16	$	10	$	86	$	50

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

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



September 30, 2018 (dollars in millions)	Total			Level 1		Level 2			Level 3
Recurring fair value measurements:
Available-for-sale securities	$	42		$	42	$	—		$	—
Derivative assets	150			—		150			—
Derivative liabilities	(118		)	—		(118		)	—



December 31, 2017 (dollars in millions)	Total			Level 1		Level 2			Level 3
Recurring fair value measurements:
Available-for-sale securities	$	64		$	64	$	—		$	—
Derivative assets	253			—		253			—
Derivative liabilities	(78		)	—		(78		)	—

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



	September 30, 2018						December 31, 2017
(dollars in millions)	Carrying Amount			Fair Value			Carrying Amount			Fair Value
Long-term receivables	$	128		$	125		$	127		$	121
Customer financing notes receivable	458			433			609			596
Short-term borrowings	(1,576		)	(1,576		)	(392		)	(392		)
Long-term debt (excluding capitalized leases)	(38,344		)	(38,803		)	(27,067		)	(29,180		)
Long-term liabilities	(295		)	(263		)	(362		)	(330		)



	September 30, 2018
(dollars in millions)	Total			Level 1		Level 2			Level 3
Long-term receivables	$	125		$	—	$	125		$	—
Customer financing notes receivable	433			—		433			—
Short-term borrowings	(1,576		)	—		(1,380		)	(196		)
Long-term debt (excluding capitalized leases)	(38,803		)	—		(38,465		)	(338		)
Long-term liabilities	(263		)	—		(263		)	—



	December 31, 2017
(dollars in millions)	Total			Level 1		Level 2			Level 3
Long-term receivables	$	121		$	—	$	121		$	—
Customer financing notes receivable	596			—		596			—
Short-term borrowings	(392		)	—		(300		)	(92		)
Long-term debt (excluding capitalized leases)	(29,180		)	—		(28,970		)	(210		)
Long-term liabilities	(330		)	—		(330		)	—

- 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

Long-Term Financing Receivables (Tables)

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Financing Receivable Credit Quality Indicators [Table Text Block]

The following table summarizes the balance by class of aerospace business related long-term receivables as of September 30, 2018 and December 31, 2017.



(dollars in millions)	September 30, 2018		December 31, 2017
Long-term trade accounts receivable	$	64	$	973
Notes and leases receivable	430		424
Total long-term receivables	$	494	$	1,397

Shareowners' Equity and Noncontrolling Interest (Tables)

9 Months Ended

Sep. 30, 2018

Stockholders' Equity Note [Abstract]

Schedule of Stockholders Equity [Table Text Block]

A summary of the changes in shareowners' equity and noncontrolling interest comprising total equity for the quarter and nine months ended September 30, 2018 and 2017 is provided below:



	Quarter Ended September 30,
	2018									2017
(dollars in millions)	Share-owners' Equity			Non-controlling Interest			Total Equity			Share-owners' Equity			Non-controlling Interest			Total Equity
Equity, beginning of period	$	31,364		$	1,982		$	33,346		$	28,442		$	1,713		$	30,155
Comprehensive income (loss) for the period:
Net income	1,238			111			1,349			1,330			104			1,434
Total other comprehensive (loss) income	(39		)	(19		)	(58		)	637			40			677
Total comprehensive income for the period	1,199			92			1,291			1,967			144			2,111
Common Stock issued under employee plans	125			—			125			86			—			86
Common Stock repurchased	(23		)	—			(23		)	(60		)	—			(60		)
Dividends on Common Stock	(536		)	—			(536		)	(533		)	—			(533		)
Dividends on ESOP Common Stock	(18		)	—			(18		)	(19		)	—			(19		)
Dividends attributable to noncontrolling interest	—			(73		)	(73		)	—			(105		)	(105		)
Capital contributions	—			138			138			—			54			54
Sale of subsidiary shares from noncontrolling interest, net	—			—			—			5			9			14
Acquisition of noncontrolling interest	—			—			—			—			14			14
Redeemable noncontrolling interest fair value adjustment	(6		)	—			(6		)	(4		)	—			(4		)
Other	1			5			6			(3		)	(19		)	(22		)
Equity, end of period	$	32,106		$	2,144		$	34,250		$	29,881		$	1,810		$	31,691



	Nine Months Ended September 30,
	2018									2017
(dollars in millions)	Share-owners' Equity			Non-controlling Interest			Total Equity			Share-owners' Equity			Non-controlling Interest			Total Equity
Equity, beginning of period	$	29,610		$	1,811		$	31,421		$	27,579		$	1,590		$	29,169
Comprehensive income (loss) for the period:
Net income	4,583			273			4,856			4,155			279			4,434
Total other comprehensive (loss) income	(198		)	(24		)	(222		)	1,007			83			1,090
Total comprehensive income for the period	4,385			249			4,634			5,162			362			5,524
Common Stock issued under employee plans	306			—			306			256			—			256
Common Stock repurchased	(75		)	—			(75		)	(1,430		)	—			(1,430		)
Dividends on Common Stock	(1,606		)	—			(1,606		)	(1,541		)	—			(1,541		)
Dividends on ESOP Common Stock	(53		)	—			(53		)	(54		)	—			(54		)
Dividends attributable to noncontrolling interest	—			(212		)	(212		)	—			(217		)	(217		)
Capital contributions	—			300			300			—			97			97
(Purchase) sale of subsidiary shares from noncontrolling interest, net	(1		)	(1		)	(2		)	4			4			8
Acquisition of noncontrolling interest	—			—			—			—			14			14
Disposition of noncontrolling interest	—			(8		)	(8		)	—			—			—
Redeemable noncontrolling interest fair value adjustment	(8		)	—			(8		)	(99		)	—			(99		)
New Revenue Standard adoption impact	(480		)	—			(480		)	—			—			—
Other	28			5			33			4			(40		)	(36		)
Equity, end of period	$	32,106		$	2,144		$	34,250		$	29,881		$	1,810		$	31,691

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 quarter and nine months ended September 30, 2018 and 2017 is provided below:



(dollars in millions)	Foreign Currency Translation			Defined Benefit Pension and Post- retirement Plans			Unrealized Gains (Losses) on Available-for-Sale Securities			Unrealized Hedging (Losses) Gains			Accumulated Other Comprehensive (Loss) Income
Quarter Ended September 30, 2018
Balance at June 30, 2018	$	(3,085	)	$	(4,499	)	$	—		$	(100	)	$	(7,684	)
Other comprehensive (loss) income before reclassifications, net	(166		)	(17		)	—			95			(88		)
Amounts reclassified, pre-tax	—			86			—			2			88
Tax expense (benefit)	4			(15		)	—			(28		)	(39		)
Balance at September 30, 2018	$	(3,247	)	$	(4,445	)	$	—		$	(31	)	$	(7,723	)

Nine Months Ended September 30, 2018
Balance at December 31, 2017	$	(2,950	)	$	(4,652	)	$	5		$	72		$	(7,525	)
Other comprehensive (loss) income before reclassifications, net	(354		)	9			—			(105		)	(450		)
Amounts reclassified, pre-tax	(3		)	262			—			(26		)	233
Tax expense (benefit)	60			(64		)	—			28			24
ASU 2016-01 adoption impact	—			—			(5		)	—			(5		)
Balance at September 30, 2018	$	(3,247	)	$	(4,445	)	$	—		$	(31	)	$	(7,723	)



(dollars in millions)	Foreign Currency Translation			Defined Benefit Pension and Post- retirement Plans			Unrealized Gains (Losses) on Available-for-Sale Securities			Unrealized Hedging (Losses) Gains			Accumulated Other Comprehensive (Loss) Income
Quarter Ended September 30, 2017
Balance at June 30, 2017	$	(3,128	)	$	(4,882	)	$	100		$	(54	)	$	(7,964	)
Other comprehensive income (loss) before reclassifications, net	474			(37		)	12			232			681
Amounts reclassified, pre-tax	(3		)	132			(138		)	(24		)	(33		)
Tax (benefit) expense reclassified	—			(66		)	50			5			(11		)
Balance at September 30, 2017	$	(2,657	)	$	(4,853	)	$	24		$	159		$	(7,327	)

Nine Months Ended September 30, 2017
Balance at December 31, 2016	$	(3,480	)	$	(5,045	)	$	353		$	(162	)	$	(8,334	)
Other comprehensive income (loss) before reclassifications, net	826			(39		)	11			332			1,130
Amounts reclassified, pre-tax	(3		)	395			(545		)	(14		)	(167		)
Tax (benefit) expense reclassified	—			(164		)	205			3			44
Balance at September 30, 2017	$	(2,657	)	$	(4,853	)	$	24		$	159		$	(7,327	)

Variable Interest Entities (Tables)

9 Months Ended

Sep. 30, 2018

Variable Interest Entity, Primary Beneficiary

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 Condensed Consolidated Balance Sheet are as follows:



(dollars in millions)	September 30, 2018		December 31, 2017
Current assets	$	5,423	$	3,976
Noncurrent assets	1,439		1,534
Total assets	$	6,862	$	5,510

Current liabilities	$	5,465	$	3,601
Noncurrent liabilities	1,951		2,086
Total liabilities	$	7,416	$	5,687

- 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)

9 Months Ended

Sep. 30, 2018

Service and Product Warranties and Product Performance Guarantees [Abstract]

Product Warranty Disclosure [Table Text Block]

The changes in the carrying amount of service and product warranties and product performance guarantees for the nine months ended September 30, 2018 and 2017 are as follows:



(dollars in millions)	2018			2017
Balance as of January 1	$	1,146		$	1,199
Warranties and performance guarantees issued	472			221
Settlements made	(380		)	(194		)
Other	(8		)	21
Balance as of September 30	$	1,230		$	1,247

Segment Financial Data (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

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

Results for the nine months ended September 30, 2018 and 2017 are as follows:



	Net Sales						Operating Profits						Operating Profit Margins
(dollars in millions)	2018			2017			2018			2017			2018		2017
Otis	$	9,604		$	9,091		$	1,424		$	1,536		14.8	%	16.9	%
UTC Climate, Controls & Security	14,291			13,292			3,081			2,562			21.6	%	19.3	%
Pratt & Whitney	13,854			11,699			919			908			6.6	%	7.8	%
UTC Aerospace Systems	11,734			10,888			1,767			1,637			15.1	%	15.0	%
Total segments	49,483			44,970			7,191			6,643			14.5	%	14.8	%
Eliminations and other	(1,026		)	(813		)	(210		)	9
General corporate expenses	—			—			(339		)	(312		)
Consolidated	$	48,457		$	44,157		$	6,642		$	6,340		13.7	%	14.4	%

Results for the quarters ended September 30, 2018 and 2017 are as follows:



	Net Sales						Operating Profits						Operating Profit Margins
(dollars in millions)	2018			2017			2018			2017			2018		2017
Otis	$	3,223		$	3,156		$	486		$	550		15.1	%	17.4	%
UTC Climate, Controls & Security	4,880			4,688			844			794			17.3	%	16.9	%
Pratt & Whitney	4,789			3,871			109			188			2.3	%	4.9	%
UTC Aerospace Systems	3,955			3,637			610			572			15.4	%	15.7	%
Total segments	16,847			15,352			2,049			2,104			12.2	%	13.7	%
Eliminations and other	(337		)	(290		)	(102		)	32
General corporate expenses	—			—			(109		)	(104		)
Consolidated	$	16,510		$	15,062		$	1,838		$	2,032		11.1	%	13.5	%

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

quarter ended September 30, 2018 is as follows:



(dollars in millions)	Otis		UTC Climate, Controls & Security		Pratt & Whitney		UTC Aerospace Systems		Total
Primary Geographical Markets
United States	$	864	$	2,537	$	3,696	$	2,805	$	9,902
Europe	968		1,377		141		560		3,046
Asia Pacific	1,129		726		316		86		2,257
Other	262		240		636		504		1,642
Total segment	$	3,223	$	4,880	$	4,789	$	3,955	16,847
Eliminations and other									(337		)
Consolidated									$	16,510

nine months ended September 30, 2018 is as follows:



(dollars in millions)	Otis		UTC Climate, Controls & Security		Pratt & Whitney		UTC Aerospace Systems		Total
Primary Geographical Markets
United States	$	2,568	$	7,250	$	10,469	$	8,235	$	28,522
Europe	3,028		4,216		440		1,752		9,436
Asia Pacific	3,220		2,131		996		255		6,602
Other	788		694		1,949		1,492		4,923
Total segment	$	9,604	$	14,291	$	13,854	$	11,734	49,483
Eliminations and other									(1,026		)
Consolidated									$	48,457

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

nine months ended September 30, 2018 are as follows:



(dollars in millions)	Otis		UTC Climate, Controls & Security		Pratt & Whitney		UTC Aerospace Systems		Total
Product Type
Commercial and industrial, non aerospace	$	9,604	$	14,291	$	31	$	44	$	23,970
Commercial aerospace	—		—		9,989		8,966		18,955
Military aerospace	—		—		3,834		2,724		6,558
Total segment	$	9,604	$	14,291	$	13,854	$	11,734	49,483
Eliminations and other									(1,026		)
Consolidated									$	48,457

Sales Type
Product	$	4,192	$	11,917	$	8,016	$	9,825	$	33,950
Service	5,412		2,374		5,838		1,909		15,533
Total segment	$	9,604	$	14,291	$	13,854	$	11,734	49,483
Eliminations and other									(1,026		)
Consolidated									$	48,457

quarter ended September 30, 2018 are as follows:



(dollars in millions)	Otis		UTC Climate, Controls & Security		Pratt & Whitney		UTC Aerospace Systems		Total
Product Type
Commercial and industrial, non aerospace	$	3,223	$	4,880	$	5	$	14	$	8,122
Commercial aerospace	—		—		3,421		3,031		6,452
Military aerospace	—		—		1,363		910		2,273
Total segment	$	3,223	$	4,880	$	4,789	$	3,955	16,847
Eliminations and other									(337		)
Consolidated									$	16,510

Sales Type
Product	$	1,448	$	4,106	$	2,703	$	3,297	$	11,554
Service	1,775		774		2,086		658		5,293
Total segment	$	3,223	$	4,880	$	4,789	$	3,955	16,847
Eliminations and other									(337		)
Consolidated									$	16,510

Acquisitions, Dispositions, Goodwill and Other Intangible Assets (General Information) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 04, 2017
Business Acquisition [Line Items]
Acquisition Cost Of Acquired Entities and Interest in Affiliates		$ 177,000,000
Gain on sale of Taylor Company		799,000,000	$ 0
Proceeds from Issuance of Debt		11,000,000,000
Unsecured bridge loan credit agreement				$ 6,500,000,000
Proceeds from sale of Taylor Company		1,000,000,000
After tax gain on sale of Taylor Company		591,000,000
Proceeds from Debt, Net of Issuance Costs		10,900,000,000
Restricted Cash	$ 9,245,000,000	9,245,000,000	$ 33,000,000
Rockwell Collins [Member]
Business Acquisition [Line Items]
Business Acquisition, Date of Acquisition Agreement	Sep. 04, 2017
Business Acquisition, Name of Acquired Entity	Rockwell Collins, Inc. (Rockwell Collins)
Business Acquisition Cash Paid Per Share	$ 93.33
Business Acquisition UTC stock payable	46.67
Payments to Acquire Businesses, Gross	15,000,000,000
Proceeds from Issuance of Debt	9,200,000,000
Unsecured bridge loan credit agreement	6,500,000,000	6,500,000,000
Business Acquisition, Assumed Long-term Debt	$ 7,000,000,000	$ 7,000,000,000

Acquisition, Dispositions, Goodwill and Other Intangible Assets (Goodwill) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($)
Goodwill [Line Items]
Goodwill - Beginning Balance	$ 27,910
Goodwill Resulting from Business Combinations	85
Goodwill - Foreign Currency Translation and Other	(316)
Goodwill - Ending Balance	27,679
Taylor Company [Member]
Goodwill [Line Items]
Goodwill - Foreign Currency Translation and Other	151
Otis [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	1,737
Goodwill Resulting from Business Combinations	6
Goodwill - Foreign Currency Translation and Other	(42)
Goodwill - Ending Balance	1,701
UTC Climate, Controls & Security [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	10,009
Goodwill Resulting from Business Combinations	1
Goodwill - Foreign Currency Translation and Other	(237)
Goodwill - Ending Balance	9,773
Pratt & Whitney [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	1,511
Goodwill Resulting from Business Combinations	58
Goodwill - Foreign Currency Translation and Other	(2)
Goodwill - Ending Balance	1,567
UTC Aerospace Systems [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	14,650
Goodwill Resulting from Business Combinations	0
Goodwill - Foreign Currency Translation and Other	(35)
Goodwill - Ending Balance	14,615
Total Segments [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	27,907
Goodwill Resulting from Business Combinations	65
Goodwill - Foreign Currency Translation and Other	(316)
Goodwill - Ending Balance	27,656
Eliminations and other [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	3
Goodwill Resulting from Business Combinations	20
Goodwill - Foreign Currency Translation and Other	0
Goodwill - Ending Balance	$ 23

Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 20,449	$ 20,038
Accumulated Amortization	6,822	6,251
Unamortized: Trademarks and Other	2,074	2,096
Total Intangible Assets Gross Excluding Goodwill	22,523	22,134
Service portfolios [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	2,181	2,178
Accumulated Amortization	1,604	1,534
Patents and trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	362	399
Accumulated Amortization	232	233
Collaboration intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	4,413	4,109
Accumulated Amortization	573	384
Customer relationships and other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	13,493	13,352
Accumulated Amortization	$ 4,413	$ 4,100

Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Amortization Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Amortization of Intangible Assets	$ 225	$ 211	$ 680	$ 626
Amortization Expense, Remaining 2018	222		222
Amortization Expense, 2019	877		877
Amortization Expense, 2020	875		875
Amortization Expense, 2021	904		904
Amortization Expense, 2022	924		924
Amortization Expense, 2023	$ 920		$ 920

Revenue Recognition Revenue Recognition (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Jun. 30, 2018	Jan. 01, 2018	Jun. 30, 2017	Dec. 31, 2016
Inventory Costs in Excess of Average Cost Per Unit	$ 0		$ 0		$ 438,000,000
Capitalized Contract Cost, Gross							$ 700,000,000
Previously Recognized Customer Funding to Contract Liability							850,000,000
Revenues	16,510,000,000	$ 15,062,000,000	48,457,000,000	$ 44,157,000,000
Research and development	586,000,000	592,000,000	1,729,000,000	1,797,000,000
Selling, general and administrative	1,681,000,000	1,582,000,000	5,151,000,000	4,709,000,000
Total costs and expenses	14,803,000,000	13,280,000,000	43,118,000,000	38,912,000,000
Other income, net	131,000,000	250,000,000	1,303,000,000	1,095,000,000
Operating profit	1,838,000,000	2,032,000,000	6,642,000,000	6,340,000,000
Non-service pension cost (benefit)	(188,000,000)	(131,000,000)	(571,000,000)	(380,000,000)
Interest expense, net	258,000,000	223,000,000	721,000,000	662,000,000
Income from operations before income taxes	1,768,000,000	1,940,000,000	6,492,000,000	6,058,000,000
Income tax expense	419,000,000	506,000,000	1,636,000,000	1,624,000,000
Net Income from operations	1,349,000,000	1,434,000,000	4,856,000,000	4,434,000,000
Less: Noncontrolling interest in subsidiaries' earnings from operations	111,000,000	104,000,000	273,000,000	279,000,000
Net income attributable to common shareowners	1,238,000,000	1,330,000,000	4,583,000,000	4,155,000,000
Accounts receivable, net	12,550,000,000		12,550,000,000		12,595,000,000
Contract with Customer, Asset, Net, Current	3,450,000,000		3,450,000,000		0
Inventories and contracts in progress, net	9,068,000,000		9,068,000,000		9,881,000,000
Other assets, current	1,337,000,000		1,337,000,000		1,397,000,000
Future income tax benefits	1,701,000,000		1,701,000,000		1,723,000,000
Intangible assets, net	15,701,000,000		15,701,000,000		15,883,000,000
Other assets	7,070,000,000		7,070,000,000		5,983,000,000
Accrued liabilities	8,867,000,000		8,867,000,000		12,316,000,000
Contract with Customer, Liability, Current	5,460,000,000		5,460,000,000		0
Other long-term liabilities	13,373,000,000		13,373,000,000		12,952,000,000
Noncontrolling interest	2,144,000,000	1,810,000,000	2,144,000,000	1,810,000,000	1,811,000,000	$ 1,982,000,000		$ 1,713,000,000	$ 1,590,000,000
Retained earnings	57,706,000,000		57,706,000,000		55,242,000,000
Contract with Customer, Asset, Reclassified to Receivable	(21,093,000,000)
Revenue, Remaining Performance Obligation, Amount	$ 106,800,000,000		$ 106,800,000,000
Revenue, Remaining Performance Obligations, to be recognized within 24 months	42.00%		42.00%
Contract Asset and Liability [Abstract]
Contract with Customer, Asset, Net, Current	$ 3,450,000,000		$ 3,450,000,000		0
Contract with Customer, Asset, Net, Noncurrent	1,075,000,000		1,075,000,000
Contract with Customer, Asset, Net	4,525,000,000		4,525,000,000
Contract with Customer, Liability, Current	5,460,000,000		5,460,000,000		0
Contract with Customer, Liability, Noncurrent	5,044,000,000		5,044,000,000
Contract with Customer, Liability	10,504,000,000		10,504,000,000
Contract with Customer, Net	5,979,000,000		5,979,000,000				6,365,000,000
Contract with Customer, Liability, Revenue Recognized	19,499,000,000				$ 1,978,000,000
Product [Member]
Revenues	11,254,000,000	10,378,000,000	33,032,000,000	30,676,000,000
Cost of Goods and Services Sold	9,342,000,000	7,800,000,000	26,512,000,000	23,068,000,000
Service [Member]
Revenues	5,256,000,000	4,684,000,000	15,425,000,000	13,481,000,000
Cost of Goods and Services Sold	3,194,000,000	$ 3,306,000,000	9,726,000,000	$ 9,338,000,000
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Satisfied Portion of the Performance Obligation of CIP							220,000,000
Inventory Costs in Excess of Average Cost Per Unit							438,000,000
Revenues	49,000,000		455,000,000
Research and development	(28,000,000)		(65,000,000)
Selling, general and administrative	0		0
Total costs and expenses	(53,000,000)		355,000,000
Other income, net	(1,000,000)		(4,000,000)
Operating profit	101,000,000		96,000,000
Non-service pension cost (benefit)	0		0
Interest expense, net	0		0
Income from operations before income taxes	101,000,000		96,000,000
Income tax expense	25,000,000		24,000,000
Net Income from operations	76,000,000		72,000,000
Less: Noncontrolling interest in subsidiaries' earnings from operations	(2,000,000)		4,000,000
Net income attributable to common shareowners	78,000,000		68,000,000
Accounts receivable, net	(1,438,000,000)		(1,438,000,000)
Contract with Customer, Asset, Net, Current	3,450,000,000		3,450,000,000
Inventories and contracts in progress, net	(2,269,000,000)		(2,269,000,000)
Other assets, current	32,000,000		32,000,000
Future income tax benefits	32,000,000		32,000,000
Intangible assets, net	(70,000,000)		(70,000,000)
Other assets	1,083,000,000		1,083,000,000
Accrued liabilities	(5,286,000,000)		(5,286,000,000)
Contract with Customer, Liability, Current	5,460,000,000		5,460,000,000
Other long-term liabilities	1,016,000,000		1,016,000,000
Noncontrolling interest	6,000,000		6,000,000
Retained earnings	(412,000,000)		(412,000,000)				$ 480,000,000
Contract Asset and Liability [Abstract]
Contract with Customer, Asset, Net, Current	3,450,000,000		3,450,000,000
Contract with Customer, Liability, Current	5,460,000,000		5,460,000,000
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] \| Product [Member]
Revenues	26,000,000		231,000,000
Cost of Goods and Services Sold	(47,000,000)		262,000,000
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] \| Service [Member]
Revenues	23,000,000		224,000,000
Cost of Goods and Services Sold	22,000,000		158,000,000
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenues	16,461,000,000		48,002,000,000
Research and development	614,000,000		1,794,000,000
Selling, general and administrative	1,681,000,000		5,151,000,000
Total costs and expenses	14,856,000,000		42,763,000,000
Other income, net	132,000,000		1,307,000,000
Operating profit	1,737,000,000		6,546,000,000
Non-service pension cost (benefit)	(188,000,000)		(571,000,000)
Interest expense, net	258,000,000		721,000,000
Income from operations before income taxes	1,667,000,000		6,396,000,000
Income tax expense	394,000,000		1,612,000,000
Net Income from operations	1,273,000,000		4,784,000,000
Less: Noncontrolling interest in subsidiaries' earnings from operations	113,000,000		269,000,000
Net income attributable to common shareowners	1,160,000,000		4,515,000,000
Accounts receivable, net	13,988,000,000		13,988,000,000
Contract with Customer, Asset, Net, Current	0		0
Inventories and contracts in progress, net	11,337,000,000		11,337,000,000
Other assets, current	1,305,000,000		1,305,000,000
Future income tax benefits	1,669,000,000		1,669,000,000
Intangible assets, net	15,771,000,000		15,771,000,000
Other assets	5,987,000,000		5,987,000,000
Accrued liabilities	14,153,000,000		14,153,000,000
Contract with Customer, Liability, Current	0		0
Other long-term liabilities	12,357,000,000		12,357,000,000
Noncontrolling interest	2,138,000,000		2,138,000,000
Retained earnings	58,118,000,000		58,118,000,000
Contract Asset and Liability [Abstract]
Contract with Customer, Asset, Net, Current	0		0
Contract with Customer, Liability, Current	0		0
Calculated under Revenue Guidance in Effect before Topic 606 [Member] \| Product [Member]
Revenues	11,228,000,000		32,801,000,000
Cost of Goods and Services Sold	9,389,000,000		26,250,000,000
Calculated under Revenue Guidance in Effect before Topic 606 [Member] \| Service [Member]
Revenues	5,233,000,000		15,201,000,000
Cost of Goods and Services Sold	$ 3,172,000,000		$ 9,568,000,000

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net income attributable to common shareowners:
Net income from continuing operations	$ 1,238	$ 1,330	$ 4,583	$ 4,155
Net income attributable to common shareowners	$ 1,238	$ 1,330	$ 4,583	$ 4,155
Basic weighted average number of shares outstanding	791.3	788.3	790.6	790.3
Stock awards and equity units	10.5	8.8	10.1	9.1
Diluted weighted average number of shares outstanding	801.8	797.1	800.7	799.4
Earnings Per Share of Common Stock - Basic:
Net income from continuing operations	$ 1.56	$ 1.69	$ 5.80	$ 5.26
Net income attributable to common shareowners	1.56	1.69	5.80	5.26
Earnings Per Share of Common Stock - Diluted:
Net income from continuing operations	1.54	1.67	5.72	5.20
Net income attributable to common shareowners	$ 1.54	$ 1.67	$ 5.72	$ 5.20
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	5.0	5.8	5.2	6.4

Inventories and Contracts in Progress (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 2,444,000,000	$ 2,038,000,000
Work-in-process	2,292,000,000	3,366,000,000
Finished goods	4,332,000,000	3,845,000,000
Contracts in progress	0	10,205,000,000
Inventory before payments and billings	9,068,000,000	19,454,000,000
Progress payments, secured by lien, on U.S. Government contracts	0	236,000,000
Billings on contracts in progress	0	9,337,000,000
Inventories and contracts in progress, net	9,068,000,000	9,881,000,000
Inventory [Line Items]
Inventory Costs in Excess of Average Cost Per Unit	0	438,000,000
UTC Aerospace Systems [Member]
Inventory [Line Items]
Other Inventory, Capitalized Costs, Gross	$ 0	$ 127,000,000

Borrowings and Lines of Credit (Short-Term Borrowings) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Short-term Debt [Line Items]
Commercial paper	$ 1,380	$ 300
Other borrowings	196	92
Total short-term borrowings	$ 1,576	$ 392

Borrowing and Lines of Credit (Narrative) (Details) € in Millions	9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2018 EUR (€)	Sep. 04, 2017 USD ($)
Line of Credit Facility [Line Items]
Aggregate Line of Credit Facility Maximum Borrowing Capacity	$ 4,350,000,000.00
Maximum Commercial Paper Borrowing Authority	4,350,000,000.00
Commercial paper, euro-denominated	881,000,000	€ 750
Unsecured bridge loan credit agreement			$ 6,500,000,000
Revolving Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,200,000,000.00
Line of Credit Facility, Expiration Date	Aug. 05, 2021
Multicurrency Revolving Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,150,000,000
Line of Credit Facility, Expiration Date	Aug. 05, 2021

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

3 Months Ended

9 Months Ended

Sep. 30, 2018

Dec. 31, 2017

Income Taxes (Unrecognized Tax Benefit Changes) (Details) $ in Millions	Sep. 30, 2018 USD ($)
Minimum [Member]
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change	$ 40
Maximum [Member]
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change	$ 610

Employee Benefit Plans (Details) - USD ($)	3 Months Ended		9 Months Ended
Employee Benefit Plans (Details) - USD ($)	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Research and development	$ 586,000,000	$ 592,000,000	$ 1,729,000,000	$ 1,797,000,000
Pension Contributions			72,000,000	2,008,000,000
Contributions - Defined benefit plans	13,000,000	1,929,000,000	72,000,000	2,008,000,000
Contributions - Defined contribution plans	97,000,000	86,000,000	296,000,000	262,000,000
Selling, general and administrative	1,681,000,000	1,582,000,000	5,151,000,000	4,709,000,000
Other Operating Income	131,000,000	250,000,000	1,303,000,000	1,095,000,000
Non-service pension cost (benefit)	(188,000,000)	(131,000,000)	(571,000,000)	(380,000,000)
Previously Reported [Member]
Defined Benefit Plan Disclosure [Line Items]
Research and development		582,000,000		1,768,000,000
Selling, general and administrative		1,524,000,000		4,544,000,000
Non-service pension cost (benefit)		0		0
Accounting Standards Update 2017-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Research and development		10,000,000		29,000,000
Selling, general and administrative		58,000,000		165,000,000
Non-service pension cost (benefit)		(131,000,000)		(380,000,000)
Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Contributions	0	2,000,000,000	0	1,900,000,000
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	94,000,000	94,000,000	280,000,000	280,000,000
Interest cost	274,000,000	281,000,000	831,000,000	838,000,000
Expected return on plan assets	558,000,000	555,000,000	1,683,000,000	1,636,000,000
Amortization of prior service credit	(11,000,000)	(9,000,000)	(31,000,000)	(27,000,000)
Recognized actuarial net loss (gain)	(100,000,000)	(144,000,000)	(302,000,000)	(430,000,000)
Net settlement and curtailment (gain) loss	(3,000,000)	(2,000,000)	0	(1,000,000)
Total net periodic benefit (income) cost	(98,000,000)	(43,000,000)	(301,000,000)	(114,000,000)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	1,000,000	2,000,000
Interest cost	7,000,000	9,000,000	19,000,000	22,000,000
Expected return on plan assets	0	0	0	0
Amortization of prior service credit	0	(1,000,000)	(2,000,000)	(1,000,000)
Recognized actuarial net loss (gain)	3,000,000	2,000,000	7,000,000	7,000,000
Net settlement and curtailment (gain) loss	0	0	0	0
Total net periodic benefit (income) cost	4,000,000	6,000,000	11,000,000	16,000,000
Product [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of Goods and Services Sold	9,342,000,000	7,800,000,000	26,512,000,000	23,068,000,000
Product [Member] \| Previously Reported [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of Goods and Services Sold		7,750,000,000		22,920,000,000
Product [Member] \| Accounting Standards Update 2017-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of Goods and Services Sold		50,000,000		148,000,000
Service [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of Goods and Services Sold	$ 3,194,000,000	3,306,000,000	$ 9,726,000,000	9,338,000,000
Service [Member] \| Previously Reported [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of Goods and Services Sold		3,293,000,000		9,300,000,000
Service [Member] \| Accounting Standards Update 2017-07 [Member]
Defined Benefit Plan Disclosure [Line Items]
Cost of Goods and Services Sold		$ 13,000,000		$ 38,000,000

Restructuring and Other Costs (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended	12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				$ (186)
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(112)
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(76)
Non-service pension cost (benefit) [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(2)
Otis [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(50)
UTC Climate, Controls & Security [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(52)
Pratt & Whitney [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(3)
UTC Aerospace Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(77)
Eliminations and other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(4)
Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(97)
Restructuring Reserve	$ 51	$ 48		51
Net pre-tax restructuring costs (reversals)	24	61	$ 12	97
Utilization and foreign exchange	21			46
Expected Costs	180			180
Remaining Costs	83			83
Current Year Actions [Member] \| Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	48	48		48
Net pre-tax restructuring costs (reversals)	19			90
Utilization and foreign exchange	19			42
Current Year Actions [Member] \| Facility Exit, Lease Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	3	0		3
Net pre-tax restructuring costs (reversals)	5			7
Utilization and foreign exchange	2			4
Current Year Actions [Member] \| Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(47)
Current Year Actions [Member] \| Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(52)
Current Year Actions [Member] \| Non-service pension cost (benefit) [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				2
Current Year Actions [Member] \| Otis [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (reversals)	2	18	9
Expected Costs	40			40
Remaining Costs	11			11
Current Year Actions [Member] \| UTC Climate, Controls & Security [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (reversals)	14	23	1
Expected Costs	97			97
Remaining Costs	59			59
Current Year Actions [Member] \| Pratt & Whitney [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (reversals)	0	3	0
Expected Costs	3			3
Remaining Costs	0			0
Current Year Actions [Member] \| UTC Aerospace Systems [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (reversals)	8	15	0
Expected Costs	36			36
Remaining Costs	13			13
Current Year Actions [Member] \| Eliminations and other [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (reversals)	0	(2)	(2)
Expected Costs	4			4
Remaining Costs	0			0
Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(76)
Restructuring Reserve	52	70		52	$ 85
Net pre-tax restructuring costs (reversals)	9	16	51	76	176
Utilization and foreign exchange	27			109
Expected Costs	368			368
Remaining Costs	116			116
Prior Year Actions [Member] \| Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	57	73		57	84
Net pre-tax restructuring costs (reversals)	3			50
Utilization and foreign exchange	19			77
Prior Year Actions [Member] \| Facility Exit, Lease Termination and Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	(5)	(3)		(5)	1
Net pre-tax restructuring costs (reversals)	6			26
Utilization and foreign exchange	8			32
Prior Year Actions [Member] \| Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(56)
Prior Year Actions [Member] \| Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(20)
Prior Year Actions [Member] \| Otis [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (reversals)	1	4	15		43
Expected Costs	69			69
Remaining Costs	6			6
Prior Year Actions [Member] \| UTC Climate, Controls & Security [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (reversals)	(1)	(5)	7		76
Expected Costs	78			78
Remaining Costs	1			1
Prior Year Actions [Member] \| Pratt & Whitney [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (reversals)	0	0	0		7
Expected Costs	7			7
Remaining Costs	0			0
Prior Year Actions [Member] \| UTC Aerospace Systems [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (reversals)	9	17	29		43
Expected Costs	207			207
Remaining Costs	109			109
Prior Year Actions [Member] \| Eliminations and other [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs (reversals)	0	$ 0	$ 0		$ 7
Expected Costs	7			7
Remaining Costs	0			0
Two Years Prior Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(13)
Restructuring Reserve	$ 83			$ 83

Financial Instruments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments, Asset Derivatives	$ 82		$ 82		$ 178
Derivatives not designated as hedging instruments, Asset Derivatives	68		68		75
Derivatives designated as hedging instruments, Liability Derivatives	60		60		18
Derivatives not designated as hedging instruments, Liability Derivatives	58		58		60
Four Quarter Rolling Average of Notional Amount of Foreign Exchange Contracts Hedging Foreign Currency Transactions	20,000		$ 20,000		19,100
Description of Net Investment Hedge Activity			We have approximately €4.95 billion of euro-denominated long-term debt and €750 million of euro-denominated commercial paper borrowings outstanding, which qualify as a net investment hedge against our investments in European businesses. As of September 30, 2018, the net investment hedge is deemed to be effective.
Gain (loss) recorded in Accumulated other comprehensive loss	95	$ 310	$ (105)	$ 440
(Gain) loss reclassified from Accumulated other comprehensive loss into Product Sales (effective portion)	2	(24)	$ (26)	(14)
Maximum Length of Time, Foreign Currency Cash Flow Hedge			4 years 25 days
Gain recognized in Other income, net	16	$ 10	$ 86	$ 50
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	10		10
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments, Asset Derivatives	36		36		77
Derivatives not designated as hedging instruments, Asset Derivatives	48		48		70
Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments, Asset Derivatives	46		46		101
Derivatives not designated as hedging instruments, Asset Derivatives	20		20		5
Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments, Liability Derivatives	25		25		10
Derivatives not designated as hedging instruments, Liability Derivatives	55		55		57
Other Long-term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments, Liability Derivatives	35		35		8
Derivatives not designated as hedging instruments, Liability Derivatives	$ 3		$ 3		$ 3

Fair Value Measurements (Fair Value Hierarchy Classification) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term borrowings	$ 1,576	$ 392
Portion at Other than Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term receivables	128	127
Customer financing notes receivable	458	609
Short-term borrowings	1,576	392
Long-term debt (excluding capitalized leases)	38,344	27,067
Long-term liabilities	295	362
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term receivables	125	121
Customer financing notes receivable	433	596
Short-term borrowings	1,576	392
Long-term debt (excluding capitalized leases)	38,803	29,180
Long-term liabilities	263	330
Fair Value Level 1 [Member] \| Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term receivables	0	0
Customer financing notes receivable	0	0
Short-term borrowings	0	0
Long-term debt (excluding capitalized leases)	0	0
Long-term liabilities	0
Fair Value Level 2 [Member] \| Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term receivables	125	121
Customer financing notes receivable	433	596
Short-term borrowings	1,380	300
Long-term debt (excluding capitalized leases)	38,465	28,970
Long-term liabilities	263	330
Fair Value Level 3 [Member] \| Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term receivables	0	0
Customer financing notes receivable	0	0
Short-term borrowings	196	92
Long-term debt (excluding capitalized leases)	338	210
Long-term liabilities	0	0
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	42	64
Derivative Assets	150	253
Fair Value, Measurements, Recurring [Member] \| Fair Value Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	42	64
Derivative Assets	0	0
Derivative Liabilities	0	0
Fair Value, Measurements, Recurring [Member] \| Fair Value Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Derivative Assets	150	253
Derivative Liabilities	118	78
Fair Value, Measurements, Recurring [Member] \| Fair Value Level 3 [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 (Commercial Aerospace Financing Commitments) (Details) - USD ($) $ in Billions	Sep. 30, 2018	Dec. 31, 2017
Commercial Aerospace [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing and other contractual commitments	$ 15.1	$ 15.3

Long-Term Financing Receivables (Reserve and Additional Information) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Long Term Receivables High Credit Risk	$ 140	$ 170
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 18	$ 17

Long-Term Financing Receivables(Class and Credit Risk Information) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total long-term receivables	$ 494	$ 1,397
Long-term trade accounts receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total long-term receivables	64	973
Notes and leases receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total long-term receivables	$ 430	$ 424

Guarantees (Details) - USD ($) $ in Millions	9 Months Ended
Guarantees (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017
Product Warranty Liability [Line Items]
Balance as of January 1	$ 1,146	$ 1,199
Warranties and performance guarantees issued	472	221
Settlements made	380	194
Other	(8)	21
Balance as of September 30	$ 1,230	$ 1,247

Contingent Liabilities (Details) $ in Millions	9 Months Ended
Contingent Liabilities (Details) $ in Millions	Sep. 30, 2018 USD ($)
U.S. Defense Contract Management Agency Claim Against Pratt & Whitney [Member]
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	December 24, 2013
Loss Contingency Allegations	As previously disclosed, in December 2013, a Divisional Administrative Contracting Officer of the United States Defense Contract Management Agency asserted a claim against Pratt & Whitney to recover overpayments of approximately $177 million plus interest (approximately $80 million through September 30, 2018). 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.
Loss Contingency Damages Sought	$177 million
Loss Contingency Actions Taken By Defendant	On March 18, 2014, Pratt & Whitney filed an appeal to the Armed Services Board of Contract Appeals. Pratt & Whitney’s appeal is still pending and we continue to believe the government’s claim is without merit.
Estimate of interest on tax benefit	80
German Tax Office Against Otis [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 $253 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 $139 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 Damages Sought	€215 million (approximately $253 million)
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.
Estimate of interest on tax benefit	€118 million (approximately $139 million)
Loss Contingency, Interest Paid	€275 million (approximately $300 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, Management's Assessment and Process	Our estimated total liability to resolve all pending and unasserted potential future asbestos claims through 2059 is approximately $341 million and is principally recorded in Other long-term liabilities on our Condensed Consolidated Balance Sheet as of September 30, 2018. 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 $156 million, which is included primarily in Other assets on our Condensed Consolidated Balance Sheet as of September 30, 2018. 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 least annually, the Company evaluates all of these factors and, with input from an outside actuarial expert, makes any necessary adjustments to both our estimated asbestos liabilities and insurance recoveries.
Loss Contingency, Estimate of Possible Loss	$ 341
Loss Contingency, Receivable	$ 156

Segment Financial Data (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Segment Financial Data (Details) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenues	$ 16,510	$ 15,062	$ 48,457	$ 44,157
Operating profit	$ 1,838	$ 2,032	$ 6,642	$ 6,340
Operating profit margin	11.10%	13.50%	13.70%	14.40%
Total Segments [Member]
Segment Reporting Information [Line Items]
Revenues	$ 16,847	$ 15,352	$ 49,483	$ 44,970
Operating profit	$ 2,049	$ 2,104	$ 7,191	$ 6,643
Operating profit margin	12.20%	13.70%	14.50%	14.80%
Otis [Member]
Segment Reporting Information [Line Items]
Revenues	$ 3,223	$ 3,156	$ 9,604	$ 9,091
Operating profit	$ 486	$ 550	$ 1,424	$ 1,536
Operating profit margin	15.10%	17.40%	14.80%	16.90%
UTC Climate, Controls & Security [Member]
Segment Reporting Information [Line Items]
Revenues	$ 4,880	$ 4,688	$ 14,291	$ 13,292
Operating profit	$ 844	$ 794	$ 3,081	$ 2,562
Operating profit margin	17.30%	16.90%	21.60%	19.30%
Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	$ 4,789	$ 3,871	$ 13,854	$ 11,699
Operating profit	$ 109	$ 188	$ 919	$ 908
Operating profit margin	2.30%	4.90%	6.60%	7.80%
Eliminations and other [Member]
Segment Reporting Information [Line Items]
Revenues	$ (337)	$ (290)	$ (1,026)	$ (813)
Operating profit	(102)	32	(210)	9
General corporate expenses [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operating profit	(109)	(104)	(339)	(312)
UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Revenues	3,955	3,637	11,734	10,888
Operating profit	$ 610	$ 572	$ 1,767	$ 1,637
Operating profit margin	15.40%	15.70%	15.10%	15.00%
United States [Member] \| Total Segments [Member]
Segment Reporting Information [Line Items]
Revenues	$ 9,902		$ 28,522
United States [Member] \| Otis [Member]
Segment Reporting Information [Line Items]
Revenues	864		2,568
United States [Member] \| UTC Climate, Controls & Security [Member]
Segment Reporting Information [Line Items]
Revenues	2,537		7,250
United States [Member] \| Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	3,696		10,469
United States [Member] \| UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Revenues	2,805		8,235
Europe [Member] \| Total Segments [Member]
Segment Reporting Information [Line Items]
Revenues	3,046		9,436
Europe [Member] \| Otis [Member]
Segment Reporting Information [Line Items]
Revenues	968		3,028
Europe [Member] \| UTC Climate, Controls & Security [Member]
Segment Reporting Information [Line Items]
Revenues	1,377		4,216
Europe [Member] \| Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	141		440
Europe [Member] \| UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Revenues	560		1,752
Asia Pacific [Member] \| Total Segments [Member]
Segment Reporting Information [Line Items]
Revenues	2,257		6,602
Asia Pacific [Member] \| Otis [Member]
Segment Reporting Information [Line Items]
Revenues	1,129		3,220
Asia Pacific [Member] \| UTC Climate, Controls & Security [Member]
Segment Reporting Information [Line Items]
Revenues	726		2,131
Asia Pacific [Member] \| Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	316		996
Asia Pacific [Member] \| UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Revenues	86		255
Other [Member] \| Total Segments [Member]
Segment Reporting Information [Line Items]
Revenues	1,642		4,923
Other [Member] \| Otis [Member]
Segment Reporting Information [Line Items]
Revenues	262		788
Other [Member] \| UTC Climate, Controls & Security [Member]
Segment Reporting Information [Line Items]
Revenues	240		694
Other [Member] \| Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	636		1,949
Other [Member] \| UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Revenues	504		1,492
Commercial and industrial, non aerospace [Member] \| Total Segments [Member]
Segment Reporting Information [Line Items]
Revenues	8,122		23,970
Commercial and industrial, non aerospace [Member] \| Otis [Member]
Segment Reporting Information [Line Items]
Revenues	3,223		9,604
Commercial and industrial, non aerospace [Member] \| UTC Climate, Controls & Security [Member]
Segment Reporting Information [Line Items]
Revenues	4,880		14,291
Commercial and industrial, non aerospace [Member] \| Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	5		31
Commercial and industrial, non aerospace [Member] \| UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Revenues	14		44
Commercial Aerospace [Member] \| Total Segments [Member]
Segment Reporting Information [Line Items]
Revenues	6,452		18,955
Commercial Aerospace [Member] \| Otis [Member]
Segment Reporting Information [Line Items]
Revenues	0		0
Commercial Aerospace [Member] \| UTC Climate, Controls & Security [Member]
Segment Reporting Information [Line Items]
Revenues	0		0
Commercial Aerospace [Member] \| Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	3,421		9,989
Commercial Aerospace [Member] \| UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Revenues	3,031		8,966
Military aerospace [Member] \| Total Segments [Member]
Segment Reporting Information [Line Items]
Revenues	2,273		6,558
Military aerospace [Member] \| Otis [Member]
Segment Reporting Information [Line Items]
Revenues	0		0
Military aerospace [Member] \| UTC Climate, Controls & Security [Member]
Segment Reporting Information [Line Items]
Revenues	0		0
Military aerospace [Member] \| Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	1,363		3,834
Military aerospace [Member] \| UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Revenues	910		2,724
Service [Member] \| Total Segments [Member]
Segment Reporting Information [Line Items]
Revenues	5,293		15,533
Service [Member] \| Otis [Member]
Segment Reporting Information [Line Items]
Revenues	1,775		5,412
Service [Member] \| UTC Climate, Controls & Security [Member]
Segment Reporting Information [Line Items]
Revenues	774		2,374
Service [Member] \| Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	2,086		5,838
Service [Member] \| UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Revenues	658		1,909
Product [Member] \| Total Segments [Member]
Segment Reporting Information [Line Items]
Revenues	11,554		33,950
Product [Member] \| Otis [Member]
Segment Reporting Information [Line Items]
Revenues	1,448		4,192
Product [Member] \| UTC Climate, Controls & Security [Member]
Segment Reporting Information [Line Items]
Revenues	4,106		11,917
Product [Member] \| Pratt & Whitney [Member]
Segment Reporting Information [Line Items]
Revenues	2,703		8,016
Product [Member] \| UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Revenues	$ 3,297		$ 9,825

Accounting Pronouncements (Details)	9 Months Ended
Accounting Pronouncements (Details)	Sep. 30, 2018
ASU 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The new standard establishes a right-of-use (ROU) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the Condensed Consolidated Statement of Operations. In addition, this standard 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. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. In July 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases. This ASU makes various targeted improvements to the leasing standard and we are evaluating this ASU upon adoption of the standard. In July 2018, the FASB issued ASU 2018-11, Leases (Topic 842): Targeted Improvements. This standard allows entities to initially apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. We will be adopting this alternative transition method when adopting the new leasing standard as of January 1, 2019. We expect that upon adoption of these standards, we will recognize ROU assets and lease liabilities and that the amounts could be -material. We do not expect ASU 2016-02 to have a material impact on our cash flows or results of operations.
ASU 2018-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	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 newly-enacted U.S. Tax Cuts and Jobs Act. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. We expect that upon adoption we will recognize a reclassification from AOCI to retained earnings that could be material, primarily related to pension. We are still evaluating the impact of our pending adoption of the new standard on our consolidated financial statements. We do not expect this ASU to have a material impact on our cash flows and results of operations.
ASU 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 includes updates to the disclosure requirements for fair value measurements including several additions, deletions and modifications to the disclosure requirements. The provisions of this ASU are effective for years beginning after December 15, 2019, with early adoption permitted. We are currently evaluating the impact of this ASU.
ASU 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 years beginning after December 15, 2020, with early adoption permitted. We are currently evaluating the impact of this ASU.
ASU 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, 2020, with early adoption permitted. We are currently evaluating the impact of this ASU.