RTX (RTX) 10-Q25 Oct 132013 Q3 Quarterly reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information (USD $)	9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013
Document and Entity Information [Abstract]
Document Type	10-Q
Document Period End Date	30-Sep-13
Amendment Flag	FALSE
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	-19
Entity Registrant Name	UNITED TECHNOLOGIES CORP /DE/
Entity Central Index Key	101829
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float		$85,186
Entity Common Stock, Shares Outstanding	917,581,965

Condensed_Consolidated_Stateme

Condensed Consolidated Statement of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net Sales:
Product sales	$11,243	$10,839	$33,159	$28,843
Service sales	4,219	4,203	12,708	12,422
Total net sales	15,462	15,042	45,867	41,265
Costs and Expenses:
Cost of products sold	8,316	8,278	24,876	21,724
Cost of services sold	2,704	2,725	8,161	8,143
Research and development	630	590	1,871	1,659
Selling, general and administrative	1,633	1,619	4,997	4,657
Total costs and expenses	13,283	13,212	39,905	36,183
Other income, net	187	211	917	851
Operating profit	2,366	2,041	6,879	5,933
Interest expense, net	226	216	679	513
Income from continuing operations before income taxes	2,140	1,825	6,200	5,420
Income tax expense	614	484	1,677	1,257
Net income from continuing operations	1,526	1,341	4,523	4,163
Less: Noncontrolling interest in subsidiaries' earnings from continuing operations	111	94	286	261
Income from continuing operations attributable to common shareowners	1,415	1,247	4,237	3,902
Discontinued operations (Note 2):
Income (loss) from operations	0	91	63	-1,017
(Gain) loss on disposal	10	-26	-30	-62
Income tax benefit (expense)	7	105	-12	256
Income (loss) from discontinued operations	17	170	21	-823
Less: Noncontrolling interest in subsidiaries' earnings from discontinued operations	0	2	0	6
Income (loss) from discontinued operations attributable to common shareowners	17	168	21	-829
Net income attributable to common shareowners	1,432	1,415	4,258	3,073
Comprehensive income	2,235	2,546	4,658	4,171
Less: Comprehensive income attributable to noncontrolling interests	128	119	277	271
Comprehensive income attributable to common shareowners	$2,107	$2,427	$4,381	$3,900
Earnings Per Share of Common Stock - Basic:
Income from continuing operations attributable to common shareowners	$1.57	$1.39	$4.70	$4.37
Net income attributable to common shareowners	$1.59	$1.58	$4.73	$3.44
Earnings Per Share of Common Stock - Diluted:
Income from continuing operations attributable to common shareowners	$1.55	$1.37	$4.64	$4.31
Net income attributable to common shareowners	$1.57	$1.56	$4.66	$3.39

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheet (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$4,621	$4,819
Accounts receivable, net	11,135	11,099
Inventories and contracts in progress, net	10,765	9,537
Future income tax benefits, current	1,935	1,611
Assets held for sale	0	1,071
Other Assets, Current	895	1,473
Total Current Assets	29,351	29,610
Customer financing assets	1,229	1,150
Future income tax benefits	1,583	1,599
Fixed assets	18,388	18,065
Less: Accumulated depreciation	-9,839	-9,547
Fixed assets, net	8,549	8,518
Goodwill	28,100	27,801
Intangible assets, net	15,495	15,189
Other assets	6,019	5,542
Total Assets	90,326	89,409
Liabilities and Equity
Short-term borrowings	303	503
Accounts payable	6,628	6,431
Accrued liabilities	15,488	15,310
Liabilities held for sale	0	421
Long-term debt currently due	1,100	1,121
Total Current Liabilities	23,519	23,786
Long-term debt	19,785	21,597
Future pension and postretirement benefit obligations	7,175	7,520
Other long-term liabilities	9,804	9,199
Total Liabilities	60,283	62,102
Commitments and contingent liabilities (Note 13)
Redeemable noncontrolling interest	124	238
Shareowners' Equity:
Common Stock	14,665	13,976
Treasury Stock	-20,233	-19,251
Retained earnings	39,599	36,776
Unearned ESOP shares	-129	-139
Accumulated other comprehensive loss	-5,325	-5,448
Total Shareowners' Equity	28,577	25,914
Noncontrolling interest	1,342	1,155
Total Equity	29,919	27,069
Total Liabilities and Equity	$90,326	$89,409

Condensed_Consolidated_Stateme1

Condensed Consolidated Statement of Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating Activities of Continuing Operations:
Income from continuing operations	$4,523	$4,163
Adjustments to reconcile income from continuing operations to net cash flows provided by operating activities of continuing operations:
Depreciation and amortization	1,335	1,047
Deferred income tax provision	13	29
Stock compensation cost	216	150
Change in:
Accounts receivable	-198	406
Inventories and contracts in progress	-1,461	-1,162
Other current assets	118	-101
Accounts payable and accrued liabilities	1,077	708
Global pension contributions	-72	-233
Other operating activities, net	-660	-356
Net cash flows provided by operating activities of continuing operations	4,891	4,651
Investing Activities of Continuing Operations:
Capital expenditures	-1,047	-748
Investments in businesses	-120	-16,008
Dispositions of businesses	1,465	362
(Increase) decrease in customer financing assets, net	-121	1
Decrease (increase) in restricted cash, net	3	-191
Increase in collaboration intangible assets	-547	-1,394
Other investing activities, net	-232	-17
Net cash flows used in investing activities of continuing operations	-599	-17,995
Financing Activities of Continuing Operations:
(Repayment) issuance of long-term debt, net	-1,795	10,798
(Decrease) increase in short-term borrowings, net	-204	4,509
Proceeds from Common Stock issued under employee stock plans	336	460
Dividends paid on Common Stock	-1,395	-1,288
Repurchase of Common Stock	-1,000	0
Other financing activities, net	-168	-493
Net cash flows (used in) provided by financing activities of continuing operations	-4,226	13,986
Discontinued Operations:
Net cash (used in) provided by operating activities	-603	22
Net cash provided by (used in) investing activities	351	-352
Net Cash used in discontinued operations	-252	-330
Effect of foreign exchange rate changes on cash and cash equivalents	-29	25
Net (decrease) increase in cash and cash equivalents	-215	337
Cash and cash equivalents, beginning of year	4,836	5,960
Cash and cash equivalents, end of period	4,621	6,297
Less: Cash and cash equivalents of businesses held for sale	0	55
Cash and cash equivalents of continuing operations, end of period	$4,621	$6,242

Introduction_of_Notes_to_Conde

Introduction of Notes to Condensed Consolidated Financial Statements	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Introduction of Notes to Condensed Consolidated Financial Statements	The Condensed Consolidated Financial Statements at September 30, 2013 and for the quarters and nine months ended September 30, 2013 and 2012 are unaudited, but in the opinion of management include all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation 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. Certain reclassifications have been made to the prior year amounts to conform to the current year presentation. The financial information included herein should be read in conjunction with the financial statements and notes in our Annual Report to Shareowners (2012 Annual Report) incorporated by reference to our Annual Report on Form 10-K for calendar year 2012 (2012 Form 10-K).

Acquisitions_Dispositions_Good

Acquisitions, Dispositions, Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Acquisitions, Dispositions, Goodwill and Other Intangible Assets	Acquisitions, Dispositions, Goodwill and Other Intangible Assets
	Business Acquisitions and Dispositions. During the first nine months of 2013, our cash investment in business acquisitions was $120 million, and consisted of a number of small acquisitions, primarily in our commercial businesses.
	On May 17, 2013, we completed the sale of the Pratt & Whitney Power Systems business to Mitsubishi Heavy Industries (MHI) and entered into a long-term engineering and manufacturing agreement with MHI. The sale generated a pre-tax gain of approximately $193 million ($132 million after tax). Cash received in connection with the sale was $432 million, excluding contingent consideration valued at approximately $200 million. Pratt & Whitney Power Systems has not been reclassified to Discontinued Operations due to our level of continuing involvement in the business post-sale.
	On February 7, 2013, we completed the acquisition of Grupo Ascensores Enor, S.A. (Enor), a privately held company headquartered in Spain with operations in Spain and Portugal, which designs, manufactures, installs and services elevators. Enor's 2012 sales were approximately $50 million. Under the terms of the transaction, Zardoya Otis, S.A. (ZOSA), a non-wholly owned subsidiary of the Company, exchanged publicly traded shares of ZOSA with a fair value of approximately $240 million as of the transaction completion date for all of the shares of Enor.
	On July 26, 2012, UTC acquired Goodrich Corporation (Goodrich), a global supplier of systems and services to the aerospace and defense industry with 2011 sales of $8.1 billion. Goodrich products include aircraft nacelles and interior, actuation, landing and electronic systems. Under the terms of the agreement, Goodrich shareholders received $127.50 in cash for each share of Goodrich common stock they owned on July 26, 2012. This equated to a total enterprise value of $18.3 billion, including $1.9 billion in net debt assumed. The acquired Goodrich businesses were combined with the legacy Hamilton Sundstrand businesses to form the new UTC Aerospace Systems segment. The Goodrich acquisition and the formation of UTC Aerospace Systems provides increased scale, financial strength and complementary product offerings, allowing us to significantly strengthen our position in the aerospace and defense industry, create aftermarket efficiencies for our customers, accelerate our ability to drive innovation within the aerospace industry, and enhance our ability to support our customers with more integrated systems. This acquisition, coupled with our acquisition of an additional interest in IAE International Aero Engines AG (IAE), as discussed below, further advances UTC's strategy of focusing on our core businesses.
	To finance the cash consideration for the Goodrich acquisition and pay related fees, expenses and other amounts due and payable, we utilized the previously disclosed net proceeds of approximately $9.6 billion from the $9.8 billion of long-term notes issued on June 1, 2012, the net proceeds of approximately $1.1 billion from the equity units issued on June 18, 2012, $3.2 billion from the issuance of commercial paper during July 2012, and $2.0 billion of proceeds borrowed under our April 24, 2012 term loan credit agreement. For the remainder of the cash consideration, we utilized approximately $0.5 billion of cash and cash equivalents generated from operating activities.
	Allocation of Consideration Transferred to Net Assets Acquired:
	The following amounts represent the final determination as of July 26, 2012 of the fair value of identifiable assets acquired and liabilities assumed from the Goodrich acquisition, through completion of the one year measurement period from the date of acquisition as required by the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 805, “Business Combinations” (ASC Topic 805). Measurement period adjustments were not significant and were not retroactively reclassified to prior periods.



	(Dollars in millions)
	Cash and cash equivalents	$	538
	Cash and cash equivalents	$	538
	Accounts receivable, net	1,205
	Accounts receivable, net	1,205
	Inventories and contracts in progress, net	1,673
	Inventories and contracts in progress, net	1,673
	Future income tax benefits, current	515
	Future income tax benefits, current	515
	Other assets, current	647
	Other assets, current	647
	Fixed assets	2,209
	Fixed assets	2,209
	Intangible assets:
	Customer relationships and related program assets	8,550
	Customer relationships and related program assets	8,550
	Trademarks	1,550
	Trademarks	1,550
	Other assets	1,501
	Other assets	1,501
	Short-term borrowings	(84		)
	Accounts payable	(587		)
	Accrued liabilities	(1,919		)
	Long-term debt	(2,961		)
	Future pension and postretirement benefit obligations	(1,743		)
	Other long-term liabilities:
	Customer contractual obligations	(2,200		)
	Other long-term liabilities	(4,013		)
	Noncontrolling interest	(41		)
	Total identifiable net assets	4,840
	Total identifiable net assets	4,840
	Goodwill	11,580
	Goodwill	11,580
	Total consideration transferred	$	16,420
	Total consideration transferred	$	16,420
	In order to allocate the consideration transferred for Goodrich, the fair values of all identifiable assets and liabilities needed to be established. For accounting and financial reporting purposes, fair value is defined under FASB ASC Topic 820, “Fair Value Measurements and Disclosures” (ASC Topic 820) as the price that would be received upon sale of an asset or the amount paid to transfer a liability in an orderly transaction between market participants at the measurement date. Market participants are assumed to be buyers and sellers in the principal (most advantageous) market for the asset or liability. Additionally, fair value measurements for an asset assume the highest and best use of that asset by market participants. Use of different estimates and judgments could yield different results.
	In determining the fair value of identifiable assets acquired and liabilities assumed, a review was conducted for any significant contingent assets or liabilities existing as of the acquisition date. As of September 30, 2013, no significant contingencies related to existing legal or government action have been identified which existed as of the opening balance sheet date. Based upon our existing practices and phase II environmental assessments done on a number of Goodrich sites, we have determined that environmental liability obligations of $325 million were assumed in connection with the Goodrich acquisition.
	The fair values of the customer relationships and related program intangible assets, which include the related aerospace program original equipment manufacturing (OEM) and aftermarket cash flows, were determined by using an “income approach” which is the most common valuation approach utilized. Under this approach, the net earnings attributable to the asset or liability being measured are isolated using the discounted projected net cash flows. These projected cash flows are isolated from the projected cash flows of the combined asset group over the remaining economic life of the intangible asset or liability being measured. Both the amount and the duration of the cash flows are considered from a market participant perspective. Our estimates of market participant net cash flows considered historical and projected pricing, remaining developmental effort, operational performance including company specific synergies, aftermarket retention, product life cycles, material and labor pricing, and other relevant customer, contractual and market factors. Where appropriate, the net cash flows are probability-adjusted to reflect the uncertainties associated with the underlying assumptions, as well as the risk profile of the net cash flows utilized in the valuation. The probability-adjusted future cash flows are then discounted to present value using an appropriate discount rate. The customer relationship and related program intangible assets are being amortized on a straight-line basis (which approximates the economic pattern of benefits) over the estimated economic life of the underlying programs of 10 to 25 years.
	We also identified customer contractual obligations on certain OEM development programs where the expected costs exceed the expected revenue under contract. We measured these liabilities under the measurement provisions of ASC Topic 820, which is based on the price to transfer the obligation to a market participant at the measurement date, assuming that the liability will remain outstanding in the marketplace. Based on the estimated net cash outflows of the OEM developmental programs plus a reasonable contracting profit margin required to transfer the contracts to market participants, we recorded assumed liabilities of approximately $2.2 billion. These liabilities will be liquidated in accordance with the underlying economic pattern of obligations, as reflected by the net cash outflows incurred on the OEM developmental programs. Total consumption of the contractual obligation for the quarter and nine months ended September 30, 2013 was approximately $60 million and $210 million, respectively. Total consumption of the contractual obligation is expected to be as follows: $70 million remaining in 2013, $274 million in 2014, $213 million in 2015, $242 million in 2016, $233 million in 2017 and $894 million thereafter.
	Goodrich had not recorded an income tax liability on the unremitted earnings of its non-U.S. subsidiaries, which were approximately $853 million as of December 31, 2011. In connection with the Goodrich acquisition, UTC made a determination to repatriate certain of these unremitted earnings, making such amounts subject to both U.S. and non-U.S. income taxes. Accordingly, an income tax liability of $215 million was recorded in purchase accounting for the unremitted earnings no longer considered permanently reinvested.
	In 2010, Pratt & Whitney entered into a preferred supplier contract with Goodrich for the development and subsequent production of nacelles for the PW1500G (Bombardier C Series) and PW1200G (Mitsubishi Regional Jet). That preferred supplier contract replaced previous contracts and preliminary Memorandum of Understandings entered into in 2006 and 2008. Under the 2010 agreement, Pratt & Whitney agreed to fund Goodrich's non-recurring development effort and established a recurring price for the production nacelles. Prior to the date of the Goodrich acquisition, Pratt & Whitney and Goodrich had asserted claims against each other in a contractual dispute and would have ultimately arbitrated the matter were it not for the acquisition. In accordance with ASC Topic 805, pre-existing relationships must be effectively settled at acquisition as the relationships become intercompany relationships upon acquisition and are eliminated in the post-combination financial statements. Any resulting settlement gains or losses should be measured at fair value and recorded on the acquisition date. Accordingly, a $46 million gain was recorded in other income by Pratt & Whitney in the quarter ended September 30, 2012 based upon a third party determination of the probability-weighted outcome had the matter gone to arbitration. No additional gain or loss was recorded in connection with the settlement of these pre-existing relationships as we determined that the terms of these two contracts were consistent with other similar market transactions at the time of our acquisition of Goodrich.
	Under Goodrich's pre-existing management continuity arrangements (MCAs), we assumed change-in-control obligations related to certain executives at Goodrich. We evaluated the change-in-control provisions governed by the MCAs and for certain of the executives, we determined that we had assumed liabilities of approximately $74 million as the benefit payments were effectively single trigger arrangements in substance. We measured the assumed liability based on fair value concepts of ASC Topic 820, using weighted average techniques of possible outcomes of the employees electing to receive such benefits. We expensed approximately $12 million in the quarter ended September 30, 2012 for MCAs where we amended the term of the MCAs beyond the original expiration date for certain executives. We incurred expense of approximately $9 million in connection with MCA payments made during the quarter ended June 30, 2013.
	Supplemental Pro-Forma Data:
	Goodrich's results of operations have been included in UTC's financial statements for the periods subsequent to the completion of the acquisition on July 26, 2012. The following unaudited supplemental pro-forma data for the quarter and nine months ended September 30, 2012 presents consolidated information as if the acquisition had been completed on January 1, 2011. There were no significant pro-forma adjustments required for the quarter and nine months ended September 30, 2013. The pro-forma results were calculated by combining the results of UTC with the stand-alone results of Goodrich for the pre-acquisition periods, which were adjusted to account for certain costs which would have been incurred during this pre-acquisition period:


	(Dollars in millions, except per share amounts)	Quarter Ended September 30, 2012				Nine Months Ended September 30, 2012
	Net sales	$	15,512			$	45,730
	Net sales	$	15,512			$	45,730
	Net income attributable to common shareowners from continuing operations	1,315				4,145
		1,315				4,145
	Basic earnings per share of common stock from continuing operations	1.47				4.63
		1.47				4.63
Diluted earnings per share of common stock from continuing operations	1.45				4.57
	1.45				4.57
The unaudited supplemental pro-forma data above includes the following significant adjustments made to account for certain costs which would have been incurred if the acquisition had been completed on January 1, 2011, as adjusted for the applicable tax impact:


(Dollars in millions)	Quarter Ended September 30, 2012				Nine Months Ended September 30, 2012
Amortization of inventory fair value adjustment1	$	(49	)		$	(49	)
Amortization of acquired Goodrich intangible assets, net2	15				107
Amortization of acquired Goodrich intangible assets, net2	15				107
Utilization of contractual customer obligation3	(10		)		(103		)
Interest expense incurred on acquisition financing, net4	(3		)		63
Interest expense incurred on acquisition financing, net4	(3		)		63
1 Removed the expense for the amortization of inventory fair value adjustments recognized in the quarter ended September 30, 2012, as the corresponding inventory would have been completely sold during the first two quarters of 2011.
2 Added the additional amortization of the acquired Goodrich intangible assets recognized at fair value in purchase accounting and eliminated the historical Goodrich intangible asset amortization expense.
3 Added the additional utilization of the Goodrich contractual customer obligation recognized in purchase accounting.
4 Added the additional interest expense for the indebtedness we incurred to finance the acquisition of Goodrich and reduced interest expense for the debt fair value adjustment which would have been amortized.
The unaudited supplemental pro-forma financial information does not reflect the potential realization of cost savings relating to the integration of the two companies. Further, the pro-forma data should not be considered indicative of the results that would have occurred if the acquisition and related financing had been consummated on January 1, 2011, nor are they indicative of future results.
In connection with regulatory approval of UTC's acquisition of Goodrich, regulatory authorities required UTC to dispose of the Goodrich electric power systems and the Goodrich pumps and engine controls businesses. Pursuant to regulatory obligations, these businesses had been held separately from UTC's and Goodrich's ongoing businesses since the acquisition of Goodrich by UTC. On March 18, 2013, we completed the sale of the Goodrich pumps and engine controls business to Triumph Group, Inc., and on March 26, 2013, we completed the sale of the Goodrich electric power systems business to Safran S.A. Combined proceeds from the sales of the two businesses were approximately $600 million.
In 2012, the UTC Board of Directors approved plans for the divestiture of a number of non-core businesses. Cash generated from these divestitures was used to repay debt incurred to finance the acquisition of Goodrich. See Note 2 for further discussion.
On June 29, 2012, Pratt & Whitney, Rolls Royce plc (Rolls-Royce), MTU Aero Engines AG (MTU), and Japanese Aero Engines Corporation (JAEC), participants in the IAE collaboration, completed a restructuring of their interests in IAE. Under the terms of the agreement, Rolls-Royce sold its ownership and collaboration interests in IAE to Pratt & Whitney, while also entering into an agreement to license its V2500 intellectual property to Pratt & Whitney. In exchange for the increased ownership and collaboration interests and intellectual property license, Pratt & Whitney paid Rolls-Royce $1.5 billion at closing with additional payments due to Rolls-Royce during the fifteen year period following closing of the purchase, conditional upon each hour flown by V2500-powered aircraft in service at the closing. Payments made to Rolls-Royce under this agreement are capitalized as collaboration intangible assets, as further discussed below. In October 2011, Pratt & Whitney and Rolls-Royce announced their intention to form a new partnership to develop an engine to power future mid-sized aircraft. In September 2013, following further discussion and because of the current regulatory environment, the parties agreed not to proceed with this partnership. As a result of this decision, an additional collaboration intangible asset payment was made to Rolls-Royce in accordance with the underlying agreement.
The collaboration interest and intellectual property licenses are reflected as intangible assets and will be amortized in relation to the economic benefits received over the remaining estimated 30 year life of the V2500 program. As a result of these transactions, Pratt & Whitney holds a 61% net interest in the collaboration 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. IAE retains limited equity with the primary economics of the V2500 program passed to the participants in the separate collaboration arrangement. As such, we have determined that IAE is a variable interest entity, and Pratt & Whitney its primary beneficiary under the criteria established in the FASB ASC Topic 810 “Consolidations” and has, therefore, been consolidated. The carrying amounts and classification of assets and liabilities for IAE in our Consolidated Balance Sheet as of September 30, 2013 are as follows:


(Dollars in millions)
Current assets	$	1,636
Current assets	$	1,636
Noncurrent assets	1,023
Noncurrent assets	1,023
Total assets	$	2,659
Total assets	$	2,659

Current liabilities	$	1,821
Current liabilities	$	1,821
Noncurrent liabilities	1,067
Noncurrent liabilities	1,067
Total liabilities	$	2,888
Total liabilities	$	2,888

Goodwill. Changes in our goodwill balances for the nine months ended September 30, 2013 were as follows:


(Dollars in millions)	Balance as of				Goodwill			Foreign currency translation and other			Balance as of
(Dollars in millions)	January 1, 2013				resulting from business combinations			Foreign currency translation and other			September 30, 2013
Otis	$	1,583			$	139		$	(7	)	$	1,715
Otis	$	1,583			$	139		$	(7	)	$	1,715
UTC Climate, Controls & Security	9,868				2			(149		)	9,721
UTC Climate, Controls & Security	9,868				2			(149		)	9,721
Pratt & Whitney	1,238				—			35			1,273
Pratt & Whitney	1,238				—			35			1,273
UTC Aerospace Systems	14,754				301			(20		)	15,035
UTC Aerospace Systems	14,754				301			(20		)	15,035
Sikorsky	353				—			(1		)	352
Sikorsky	353				—			(1		)	352
Total Segments	27,796				442			(142		)	28,096
Total Segments	27,796				442			(142		)	28,096
Eliminations and other	5				—			(1		)	4
Eliminations and other	5				—			(1		)	4
Total	$	27,801			$	442		$	(143	)	$	28,100
Total	$	27,801			$	442		$	(143	)	$	28,100
Intangible Assets. Identifiable intangible assets are comprised of the following:


	30-Sep-13							December 31, 2012
(Dollars in millions)	Gross Amount				Accumulated			Gross Amount			Accumulated
(Dollars in millions)	Gross Amount				Amortization			Gross Amount			Amortization
Amortized:
Service portfolios	$	2,235			$	(1,272	)	$	2,127		$	(1,202	)
Service portfolios	$	2,235			$	(1,272	)	$	2,127		$	(1,202	)
Patents and trademarks	382				(178		)	412			(167		)
Patents and trademarks	382				(178		)	412			(167		)
IAE collaboration	2,093				—			1,526			—
IAE collaboration	2,093				—			1,526			—
Customer relationships and other	12,025				(2,064		)	11,901			(1,718		)
Customer relationships and other	12,025				(2,064		)	11,901			(1,718		)
	16,735				(3,514		)	15,966			(3,087		)
	16,735				(3,514		)	15,966			(3,087		)
Unamortized:
Trademarks and other	2,274				—			2,310			—
Trademarks and other	2,274				—			2,310			—
Total	$	19,009			$	(3,514	)	$	18,276		$	(3,087	)
Total	$	19,009			$	(3,514	)	$	18,276		$	(3,087	)
The customer relationships intangible assets include payments made to our customers to secure certain contractual rights and are being amortized on a straight-line basis, as it approximates the underlying economic pattern of benefits. In accordance with the FASB ASC Topic 605, “Customer Payments and Incentives,” we classify amortization of such payments as a reduction of sales. The IAE collaboration intangible asset is being amortized based upon the economic pattern of benefits as represented by the underlying cash flows. As these cash flows have been negative to date, no amortization has yet been recorded. Amortization of intangible assets for the quarter and nine months ended September 30, 2013 was $180 million and $531 million respectively, compared with $166 million and $360 million for the same periods of 2012. The following is the expected amortization of intangible assets for the years 2013 through 2018:


(Dollars in millions)		Remaining 2013				2014			2015			2016		2017		2018
Amortization expense		$	171			$	681		$	645		$	626	$	619	$	648
Amortization expense		$	171			$	681		$	645		$	626	$	619	$	648

Discontinued_Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Discontinued Operations	Discontinued Operations
	In 2012, the UTC Board of Directors approved plans for the divestiture of a number of non-core businesses, which were completed with the sale of Pratt & Whitney Rocketdyne (Rocketdyne) on June 14, 2013, as discussed below. Cash generated from these divestitures was used to repay debt incurred to finance the Goodrich acquisition.
	The sale of substantially all operations of Rocketdyne to GenCorp Inc. generated a pre-tax loss of approximately $7 million ($3 million after tax) through September 30, 2013, which has been included in discontinued operations in the Condensed Consolidated Statement of Comprehensive Income. During the nine months ended September 30, 2012, we recorded pre-tax goodwill impairment charges of approximately $360 million ($220 million after tax) related to Rocketdyne.
	On February 12, 2013, we completed the disposition of UTC Power to ClearEdge Power. The disposition resulted in payments by UTC totaling $48 million, which included capitalization of the business prior to the sale and interim funding of operations as the buyer took control of a loss generating business. We have no continuing involvement with the UTC Power business post disposition.
	The legacy Hamilton Sundstrand Industrial businesses, as well as Clipper Windpower (Clipper), Rocketdyne and UTC Power all met the "held-for-sale" criteria in 2012. The results of operations, including the net realized gains and losses on disposition, and the related cash flows which resulted from these non-core businesses, have been reclassified to Discontinued Operations in our Condensed Consolidated Statements of Comprehensive Income and Cash Flows. The dispositions of Clipper and the legacy Hamilton Sundstrand Industrial businesses were completed in 2012.
	The following summarized financial information for our discontinued operations businesses has been segregated from continuing operations and reported as Discontinued Operations:


		Quarter Ended September 30,					Nine Months Ended September 30,
	(Dollars in millions)	2013		2012			2013			2012
	Discontinued Operations:
	Net sales	$	—	$	522		$	309		$	1,607

	Income (loss) from operations	$	—	$	91		$	63		$	(1,017	)

	Income tax expense	—		(30		)	(32		)	(38		)

	Income (loss) from operations, net of income taxes	—		61			31			(1,055		)

	Gain (loss) on disposal	10		(26		)	(30		)	(62		)

	Income tax benefit	7		135			20			294

	Net income (loss) on discontinued operations	$	17	$	170		$	21		$	(823	)

	Income (loss) from operations of discontinued operations for the nine months ended September 30, 2012 includes pre-tax impairment charges of approximately $1,135 million. There were no impairment charges for the quarter ended September 30, 2012. These amounts were previously included in loss on disposal of discontinued operations and have been reclassified for consistency of presentation.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Earnings Per Share	Earnings Per Share


		Quarter Ended September 30,				Nine Months Ended September 30,
	(Dollars in millions, except per share amounts; shares in millions)	2013		2012		2013		2012
	Net income attributable to common shareowners:
	Net income from continuing operations	$	1,415	$	1,247	$	4,237	$	3,902

	Net income (loss) from discontinued operations	17		168		21		(829		)

	Net income attributable to common shareowners	$	1,432	$	1,415	$	4,258	$	3,073

	Basic weighted average number of shares outstanding	900.8		896.3		900.9		893.6

	Stock awards and equity units	14.7		10.9		13.2		11.7

	Diluted weighted average number of shares outstanding	915.5		907.2		914.1		905.3

	Earnings (Loss) Per Share of Common Stock - Basic:
	Net income from continuing operations	$	1.57	$	1.39	$	4.7	$	4.37

	Net income (loss) from discontinued operations	0.02		0.19		0.02		(0.93		)

	Net income attributable to common shareowners	1.59		1.58		4.73		3.44

	Earnings (Loss) Per Share of Common Stock - Diluted:
	Net income from continuing operations	$	1.55	$	1.37	$	4.64	$	4.31

	Net income (loss) from discontinued operations	0.02		0.19		0.02		(0.92		)

	Net income attributable to common shareowners	1.57		1.56		4.66		3.39


	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. These outstanding stock awards are not included in the computation of diluted earnings per share because the effect would be anti-dilutive. For the quarter and nine months ended September 30, 2013 there were no anti-dilutive stock awards excluded from the computation. For the quarter and nine months ended September 30, 2012, the number of stock awards excluded from the computation was 6.1 million and 4.8 million, respectively. The dilutive impact of our equity units issued in 2012 was not significant for the quarter and nine months ended September 30, 2013. There was no impact on diluted earnings per share due to equity units for the quarter and nine months ended September 30, 2012.

Inventories_and_Contracts_in_P

Inventories and Contracts in Progress	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Inventories and Contracts in Progress	Inventories and Contracts in Progress


	(Dollars in millions)	September 30,			December 31,
		2013			2012
	Raw materials	$	1,967		$	1,861

	Work-in-process	4,864			4,151

	Finished goods	3,556			3,205

	Contracts in progress	8,038			7,354

		18,425			16,571

	Less:
	Progress payments, secured by lien, on U.S. Government contracts	(379		)	(274		)
	Billings on contracts in progress	(7,281		)	(6,760		)
		$	10,765		$	9,537

	As of September 30, 2013 and December 31, 2012, inventories include capitalized contract development costs of $866 million and $823 million, respectively, related to certain aerospace programs. These capitalized costs are liquidated as production units are delivered to the customer. The capitalized contract development costs within inventories principally relate to costs capitalized on Sikorsky’s CH-148 contract with the Canadian Government. The CH-148 is a derivative of the H-92, a military variant of the S-92 helicopter.

Borrowings_and_Lines_of_Credit

Borrowings and Lines of Credit	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Borrowings and Lines of Credit	Borrowings and Lines of Credit


	(Dollars in millions)	September 30,			December 31,
		2013			2012
	Commercial paper	$	100		$	320

	Other borrowings	203			183

	Total short-term borrowings	$	303		$	503

	At September 30, 2013, we had revolving credit agreements with various banks permitting aggregate borrowings of up to $4 billion pursuant to a $2 billion revolving credit agreement and a $2 billion multicurrency revolving credit agreement, both of which expire in November 2016. As of September 30, 2013, there were no borrowings under either of these revolving credit 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, 2013, our maximum commercial paper borrowing authority as set by our Board of Directors was $4 billion. We use our commercial paper borrowings for general corporate purposes, including the funding of potential acquisitions, debt refinancing, and repurchases of our common stock.
	On May 7, 2013, we commenced cash tender offers for two series of outstanding notes issued by Goodrich and the UTC 1.200% Senior Notes. A total of $874 million principal amount of all notes subject to the tender offers, and $36 million of the fair value adjustment related to the notes assumed in the Goodrich acquisition, were repaid, including approximately $103 million principal amount of the 2016 Goodrich 6.290% notes, approximately $98 million principal amount of the 2019 Goodrich 6.125% notes, and approximately $674 million principal amount of the 2015 UTC 1.200% Senior Notes. An extinguishment loss of approximately $18 million was recognized within Interest expense, net in the accompanying Condensed Consolidated Statements of Comprehensive Income.
	On June 24, 2013, we redeemed all remaining outstanding 2015 UTC 1.200% Senior Notes, representing $327 million in aggregate principal, under our redemption notice issued on May 24, 2013. An extinguishment loss of approximately $6 million was recognized within Interest expense, net in the accompanying Condensed Consolidated Statements of Comprehensive Income.
	On August 23, 2013, we redeemed all remaining outstanding 2019 Goodrich 6.125% notes, representing $202 million in aggregate principal, under our redemption notice issued on July 24, 2013. On September 27, 2013, we redeemed all remaining outstanding 2021 Goodrich 3.600% notes, representing $294 million in aggregate principal, under our redemption notice issued on August 28, 2013. A combined extinguishment gain of approximately $1 million was recognized within Interest expense, net in the accompanying Condensed Consolidated Statements of Comprehensive Income.
	As previously disclosed, on December 6, 2012, we announced that we had commenced cash tender offers for six series of outstanding notes issued by Goodrich. These offers expired on January 7, 2013. Approximately $637 million in aggregate principal amount of notes subject to the tender offers and $126 million of the fair value adjustment were repaid, with $635 million in aggregate principal amount being eligible for the early tender premium and approximately $2 million in aggregate principal amount being paid on January 8, 2013. An extinguishment loss of approximately $26 million was recognized during 2012 within Interest expense, net in the accompanying Condensed Consolidated Statements of Comprehensive Income.
	Long-term debt consisted of the following:


	(Dollars in millions)	September 30,			December 31,
		2013			2012
	LIBOR§ plus 0.270% floating rate notes due 2013	$	1,000		$	1,000

	LIBOR§ plus 0.500% floating rate notes due 2015	500			500

	1.200% notes due 2015*	—			1,000

	4.875% notes due 2015*	1,200			1,200

	6.290% notes due 2016‡	188			291

	5.375% notes due 2017*	1,000			1,000

	1.800% notes due 2017*	1,500			1,500

	6.800% notes due 2018‡	99			99

	6.125% notes due 2019‡	—			300

	6.125% notes due 2019*	1,250			1,250

	8.875% notes due 2019	272			272

	4.500% notes due 2020*	1,250			1,250

	4.875% notes due 2020‡	171			171

	3.600% notes due 2021‡	—			295

	8.750% notes due 2021	250			250

	3.100% notes due 2022*	2,300			2,300

	1.550% junior subordinated notes due 2022†	1,100			1,100

	7.100% notes due 2027‡	141			141

	6.700% notes due 2028	400			400

	7.500% notes due 2029*	550			550

	5.400% notes due 2035*	600			600

	6.050% notes due 2036*	600			600

6.800% notes due 2036‡	134			134

7.000% notes due 2038‡	159			159

6.125% notes due 2038*	1,000			1,000

5.700% notes due 2040*	1,000			1,000

4.500% notes due 2042*	3,500			3,500

Project financing obligations	69			100

Other (including capitalized leases and discounts)‡	438			403

Total principal long-term debt	20,671			22,365

Other (fair market value adjustment)‡	214			353

Total long-term debt	20,885			22,718

Less: current portion	1,100			1,121

Long-term debt, net of current portion	$	19,785		$	21,597


*	We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.

†	The junior subordinated notes are redeemable at our option, in whole or in part, on a date not earlier than August 1, 2017. The redemption price will be the principal amount, plus accrued and unpaid interest, if any, up to but excluding the redemption date. We may extend or eliminate the optional redemption date as part of a remarketing of the junior subordinated notes which could occur between April 29, 2015 and July 15, 2015 or between July 23, 2015 and July 29, 2015.

‡	Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.

§	The three-month LIBOR rate as of September 30, 2013 was approximately 0.3%.
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 issuance, subject to our internal limitations on the amount of equity and debt to be issued under this shelf registration statement.

Income_Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Income Taxes	Income Taxes
	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, Canada, China, France, Germany, Hong Kong, Italy, Japan, South Korea, Singapore, Spain, 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 2000.
	In the ordinary course of business, there is inherent uncertainty in quantifying our income tax positions. We assess our income tax positions and record tax benefits for all years subject to examination based upon management's evaluation of the facts, circumstances, and information available at the reporting date. For those tax positions where it is more likely than not that a tax benefit will be sustained, we have recorded the largest amount of tax benefit with a greater than 50% likelihood of being realized upon ultimate settlement with a taxing authority that has full knowledge of all relevant information. For those income tax positions where it is not more likely than not that a tax benefit will be sustained, no tax benefit has been recognized in the financial statements. Where applicable, associated interest has also been recognized; interest accrued in relation to unrecognized tax benefits is recorded in interest expense. Penalties, if incurred, would be recognized as a component of income tax expense.
	It is reasonably possible that over the next twelve months the amount of unrecognized tax benefits may change within a range of a net increase of $45 million to a net decrease of $490 million as a result of additional worldwide uncertain tax positions, the revaluation of current uncertain tax positions arising from developments in examinations, in appeals or in the courts, or the closure of tax statutes. A portion of this net change may impact the Company's income tax expense. Not included in the range are assessments made by the French Tax Authority of €237 million (approximately $320 million) related to the proposed disallowance of certain deductions claimed in France for tax years 2008 through 2011. This is a recurring issue and it is expected that similar challenges will be raised in subsequent tax years until the issue is resolved. Resolution discussions with the French Revenue Authority on this matter have been unsuccessful to date and UTC may be required to pursue the defense of the issue through litigation, which could be commenced as early as the fourth quarter of 2013. UTC intends to assert a vigorous defense and believes it should prevail on the issue. Accordingly, no accrual has been made for this matter. Also, not included in the range is €204 million (approximately $275 million) of tax benefits that we have claimed related to a 1998 German reorganization. A portion of these tax benefits was denied by the German Tax Office on July 5, 2012, as a result of the audit of tax years 1999 to 2000. On August 3, 2012, the Company filed suit in the German Tax Court and expects to litigate this case. In 2008 the German Federal Tax Court denied benefits to another taxpayer in a case involving a German tax law relevant to our reorganization. The determination of the German Federal Tax Court on this other matter was appealed to the European Court of Justice (ECJ) to determine if the underlying German tax law is violative of European Union (EU) principles. On September 17, 2009 the ECJ issued an opinion in this case that is generally favorable to the other taxpayer and referred the case back to the German Federal Tax Court for further consideration of certain related issues. In May 2010, the German Federal Tax Court released its decision, in which it resolved certain tax issues that may be relevant to our audit and remanded the case to a lower court for further development. After consideration of the ECJ decision and the latest German Federal Tax Court decision, we continue to believe that it is more likely than not that the relevant German tax law is violative of EU principles and we have not accrued tax expense for this matter. As we continue to monitor developments related to this matter, it may become necessary for us to accrue tax expense and related interest.
	UTC tax years 2006 through 2008 are currently before the Appeals Division of the IRS (IRS Appeals) for resolution discussions regarding certain proposed adjustments with which UTC does not agree. Such resolution discussions are currently expected to continue into 2014 and be completed within the next 12 months. Tax years 2009 and 2010 are under review by the Examination Division of the IRS (IRS Examination), which is expected to continue into 2014 and be completed within the next 12 months.
	The Company is currently engaged in litigation regarding the proper timing of certain deductions taken by Goodrich in its tax years 2001 and 2002, prior to its acquisition by UTC, which could be settled as early as the fourth quarter of 2013. UTC believes that this matter is adequately reserved and it is not expected that any potential settlement would have a material adverse impact on financial results. The Company is also engaged in litigation with respect to a separate issue involving the proper timing of deductions taken by Goodrich Corporation in its tax years 2005 and 2006, prior to its acquisition by UTC, which is expected to continue into 2014. This is a recurring issue and it is expected that the IRS will continue to challenge it in subsequent tax years, potentially including post-acquisition years, until the issue is resolved. Goodrich pre-acquisition tax years 2007 through 2010 are currently before IRS Appeals for resolution discussions regarding certain disputed proposed adjustments, including the recurring timing issue described above. These resolution discussions are expected to continue into 2014.

Employee_Benefit_Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Employee Benefit Plans	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. As part of our acquisition of Goodrich on July 26, 2012, we assumed approximately $1.5 billion of pension and postretirement benefit plan obligations. Contributions to our plans were as follows:


		Quarter Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions)	2013			2012			2013			2012
	Defined Benefit Plans	$	21		$	209		$	72		$	233

	Defined Contribution Plans	$	75		$	65		$	258		$	183

	There were no contributions to our domestic defined benefit pension plans in the first nine months of 2013. In the first nine months of 2012, we made contributions of $201 million to our domestic defined benefit pension plans, all of which was contributed in the third quarter of 2012.
	The following tables illustrate the components of net periodic benefit cost for our defined pension and other postretirement benefit plans:


		Pension Benefits						Other Postretirement Benefits
		Quarter Ended						Quarter Ended
		September 30,						September 30,
	(Dollars in millions)	2013			2012			2013			2012
	Service cost	$	142		$	131		$	1		$	1

	Interest cost	343			344			9			10

	Expected return on plan assets	(526		)	(503		)	—			—

	Amortization	(8		)	(7		)	(2		)	(2		)
	Recognized actuarial net loss (gain)	237			180			(1		)	(1		)

	Net settlement and curtailment loss	—			15			—			—

	Total net periodic benefit cost	$	188		$	160		$	7		$	8



		Pension Benefits						Other Postretirement Benefits
		Nine Months Ended						Nine Months Ended
		September 30,						September 30,
	(Dollars in millions)	2013			2012			2013			2012
	Service cost	$	428		$	361		$	3		$	3

	Interest cost	1,029			970			28			26

	Expected return on plan assets	(1,579		)	(1,415		)	—			—

	Amortization	(26		)	(13		)	(8		)	(2		)
	Recognized actuarial net loss (gain)	717			541			(3		)	(5		)

	Net settlement and curtailment (gain) loss	(17		)	50			—			—

	Total net periodic benefit cost	$	552		$	494		$	20		$	22

	Net settlements and curtailment gains for pension benefits include curtailment gains of approximately $24 million related to, and recorded in, discontinued operations for the nine months ended September 30, 2013. There were no curtailment gains related to discontinued operations for the quarter ended September 30, 2013. Net settlements and curtailment losses for pension benefits include curtailment losses of approximately $24 million related to, and recorded in, discontinued operations for the nine months ended September 30, 2012. There were no curtailment losses related to discontinued operations for the quarter ended September 30, 2012.

Restructuring_and_Other_Costs

Restructuring and Other Costs	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Restructuring and Other Costs	Restructuring Costs
	During the nine months ended September 30, 2013, we recorded net pre-tax restructuring costs totaling $343 million for new and ongoing restructuring actions as follows:


	(Dollars in millions)
	Otis	$	68

	UTC Climate, Controls & Security	66

	Pratt & Whitney	122

	UTC Aerospace Systems	65

	Sikorsky	25

	Eliminations and other	(1		)
	Restructuring costs recorded within continuing operations	345

	Restructuring costs recorded within discontinued operations	(2		)
	Total	$	343

	The net costs included $145 million recorded in cost of sales, $199 million in selling, general and administrative expenses, $1 million in other income, net, and ($2) million in discontinued operations. As described below, these costs primarily relate to actions initiated during 2013 and 2012.
	2013 Actions. During the nine months ended September 30, 2013, we initiated restructuring actions relating to ongoing cost reduction efforts, including workforce reductions and the consolidation of field operations. We recorded net pre-tax restructuring costs totaling $298 million, including $100 million in cost of sales and $198 million in selling, general and administrative expenses.
	We expect the actions initiated in the nine months ended September 30, 2013 to result in net workforce reductions of approximately 3,600 hourly and salaried employees, the exiting of approximately 600 thousand net square feet of facilities and the disposal of assets associated with exited facilities. As of September 30, 2013, we have completed net workforce reductions of approximately 2,400 employees and have exited approximately 5,000 net square feet. We are targeting the majority of the remaining workforce and all facility related cost reduction actions for completion during 2013 and 2014. No specific plans for significant other actions have been finalized at this time.
	The following table summarizes the accrual balances and utilization by cost type for the 2013 restructuring actions:


	(Dollars in millions)		Severance				Asset				Facility Exit,				Total
							Write-Downs				Lease
											Termination and
											Other Costs
	Restructuring accruals at July 1, 2013		$	153			$	—			$	7			$	160

	Net pre-tax restructuring costs		89				1				6				96

	Utilization and foreign exchange		(108		)		(1		)		(2		)		(111		)
	Balance at September 30, 2013		$	134			$	—			$	11			$	145

	The following table summarizes expected, incurred and remaining costs for the 2013 restructuring actions by type:


	(Dollars in millions)		Severance				Asset				Facility Exit,				Total
							Write-Downs				Lease
											Termination and
											Other Costs
	Expected costs		$	287			$	13			$	41			$	341

	Costs incurred - quarter ended March 31, 2013		(19		)		—				(1		)		(20		)

	Costs incurred - quarter ended June 30, 2013		(163		)		(12		)		(7		)		(182		)
	Costs incurred - quarter ended September 30, 2013		(89		)		(1		)		(6		)		(96		)
	Balance at September 30, 2013		$	16			$	—			$	27			$	43

	The following table summarizes expected, incurred and remaining costs for the 2013 restructuring actions by segment:


	(Dollars in millions)	Expected				Costs incurred Quarter ended				Costs incurred Quarter ended June 30, 2013				Costs incurred Quarter ended September 30, 2013				Remaining Costs at September 30, 2013
		Costs				31-Mar-13
	Otis	$	61			$	(6	)		$	(35	)		$	(12	)		$	8

	UTC Climate, Controls & Security	81				(8		)		(18		)		(34		)		21

	Pratt & Whitney	127				(6		)		(93		)		(22		)		6

UTC Aerospace Systems	55				—				(28		)		(19		)		8

Sikorsky	18				—				(8		)		(10		)		—

Eliminations and other	(1		)		—				—				1				—

Total	$	341			$	(20	)		$	(182	)		$	(96	)		$	43

2012 Actions. During the nine months ended September 30, 2013, we recorded net pre-tax restructuring costs totaling $44 million for restructuring actions initiated in 2012, including $40 million in cost of sales, $3 million in selling, general and administrative expenses, and $1 million in other income, net. The 2012 actions relate to ongoing cost reduction efforts, including workforce reductions and the consolidation of field operations.
As of September 30, 2013, we have completed net workforce reductions of approximately 6,100 employees of an expected 7,300 employees, and have exited approximately 1.6 million net square feet of facilities of an expected 3.6 million net square feet. We are targeting the majority of the remaining workforce and facility related cost reduction actions for completion during 2013 and 2014.
The following table summarizes the accrual balances and utilization by cost type for the 2012 restructuring actions:


(Dollars in millions)	Severance				Asset				Facility Exit,				Total
					Write-Downs				Lease
									Termination and
									Other Costs
Restructuring accruals at July 1, 2013	$	142			$	—			$	47			$	189

Net pre-tax restructuring costs	(3		)		—				9				6

Utilization and foreign exchange	(32		)		—				(13		)		(45		)

Balance at September 30, 2013	$	107			$	—			$	43			$	150

The following table summarizes expected, incurred and remaining costs for the 2012 restructuring actions by type:


(Dollars in millions)	Severance				Asset				Facility Exit,				Total
					Write-Downs				Lease
									Termination and
									Other Costs
Expected costs	$	477			$	15			$	168			$	660

Costs incurred through December 31, 2012	(452		)		(14		)		(110		)		(576		)
Costs incurred - quarter ended March 31, 2013	(18		)		(1		)		(10		)		(29		)
Costs incurred - quarter ended June 30, 2013	1				—				(10		)		(9		)

Costs incurred - quarter ended September 30, 2013	3				—				(9		)		(6		)

Balance at September 30, 2013	$	11			$	—			$	29			$	40

The following table summarizes expected, incurred and remaining costs for the 2012 restructuring actions by segment:


(Dollars in millions)	Expected				Costs incurred through				Costs incurred Quarter ended				Costs incurred Quarter ended June 30, 2013				Costs incurred Quarter ended September 30, 2013			Remaining Costs at September 30, 2013
	Costs				31-Dec-12				31-Mar-13
Otis	$	157			$	(146	)		$	(1	)		$	(2	)		$	(1	)	$	7

UTC Climate, Controls & Security	149				(123		)		(14		)		(1		)		1			12

Pratt & Whitney	98				(94		)		(1		)		—				—			3

UTC Aerospace Systems	154				(121		)		(8		)		(5		)		(5		)	15

Sikorsky	57				(47		)		(5		)		(1		)		(1		)	3

Eliminations and other	19				(19		)		—				—				—			—

Discontinued operations	26				(26		)		—				—				—			—

Total	$	660			$	(576	)		$	(29	)		$	(9	)		$	(6	)	$	40

2011 Actions. As of September 30, 2013, we have approximately $5 million of accrual balances remaining related to 2011 actions.

Financial_Instruments

Financial Instruments	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Financial Instruments	Financial Instruments
	We enter into derivative instruments for risk management purposes only, 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.
	By their nature, all financial instruments involve market and credit risks. We enter into derivative and other financial instruments with major investment grade financial institutions and have policies to monitor the credit risk of those counterparties. We limit counterparty exposure and concentration of risk by diversifying counterparties. While there can be no assurance, we do not anticipate any material non-performance by any of these counterparties.
	Foreign Currency Forward Contracts. We manage our foreign currency transaction risks to acceptable limits through the use of derivatives that hedge forecasted cash flows associated with foreign currency transaction exposures, which are accounted for as cash flow hedges, as we deem appropriate. To the extent these derivatives are effective in offsetting the variability of the hedged cash flows, and otherwise meet the hedge accounting criteria of the Derivatives and Hedging Topic of the FASB ASC, the changes in the derivatives’ fair values are not included in current earnings but are included in “Accumulated other comprehensive loss.” These changes in fair value will subsequently be reclassified into earnings as a component of product sales or expenses, as applicable, when the forecasted transaction occurs. To the extent that a previously designated hedging transaction is no longer an effective hedge, any ineffectiveness measured in the hedging relationship is recorded currently in earnings in the period in which it occurs.
	To the extent the hedge accounting criteria are not met, the foreign currency forward contracts are utilized as economic hedges and changes in the fair value of these contracts are recorded currently in earnings in the period in which they occur. These include hedges that are used to reduce exchange rate risks arising from the change in fair value of certain foreign currency denominated assets and liabilities (e.g. payables, receivables) and other economic hedges where the hedge accounting criteria were not met.
	The four quarter rolling average of the notional amount of foreign exchange contracts hedging foreign currency transactions was $12.6 billion and $11.8 billion at September 30, 2013 and December 31, 2012, respectively.
	We enter into transactions that are subject to arrangements designed to provide for netting of offsetting obligations in the event of the insolvency or default of a counterparty. However, we have not elected to offset multiple contracts with a single counterparty and, as a result, the fair value of the derivative instruments in a loss position is not offset against the fair value of derivative instruments in a gain position.
	The following table summarizes the fair value of derivative instruments as of September 30, 2013 and December 31, 2012 which consist solely of foreign exchange contracts:


		30-Sep-13								December 31, 2012
	(Dollars in millions)	Derivatives				Derivatives not				Derivatives				Derivatives not
		designated				designated as				designated				designated as
		as hedging				hedging				as hedging				hedging
		instruments				instruments				instruments				instruments
	Balance Sheet Asset Locations:
	Other assets, current	$	38			$	23			$	48			$	47

	Other assets	22				3				30				3

		60				26				78				50

	Total Asset Derivative Contracts					$	86							$	128

	Balance Sheet Liability Locations:
	Accrued liabilities	$	20			$	53			$	10			$	136

	Other long-term liabilities	13				2				1				2

		33				55				11				138

	Total Liability Derivative Contracts					$	88							$	149

	The impact from foreign exchange derivative instruments that qualified as cash flow hedges was as follows:


		Quarter Ended September 30,								Nine Months Ended September 30,
	(Dollars in millions)	2013				2012				2013				2012
	Gain (loss) recorded in Accumulated other comprehensive loss	$	97			$	146			$	(64	)		$	83

	Gain (loss) reclassified from Accumulated other comprehensive loss into Product sales (effective portion)	$	1			$	7			$	(22	)		$	26

	Assuming current market conditions continue, a $15 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, 2013, all derivative contracts accounted for as cash flow hedges will mature by September 2015.
	The effect on the Condensed Consolidated Statement of Comprehensive Income from derivative contracts not designated as hedging instruments was as follows:


		Quarter Ended September 30,								Nine Months Ended September 30,
	(Dollars in millions)	2013				2012				2013				2012
	Gain (loss) recognized in Other income, net	$	10			$	(19	)		$	33			$	(21	)

	Valuation Hierarchy. The following table provides 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, 2013 and December 31, 2012:


	(Dollars in millions)	Total Carrying				Quoted price in				Significant other				Unobservable
		Value at				active markets				observable				inputs
		30-Sep-13				(Level 1)				inputs				(Level 3)
										(Level 2)
	Recurring fair value measurements:
	Available-for-sale securities	$	882			$	882			$	—			$	—

	Derivative assets	86				—				86				—

	Derivative liabilities	(88		)		—				(88		)		—

Nonrecurring fair value measurements:
Business dispositions	40				—				40				—

During the nine months ended September 30, 2013, we recorded an approximately $38 million net gain from UTC Climate, Controls & Security's ongoing portfolio transformation, primarily due to a gain on the sale of a business in Hong Kong. In addition, we recorded an approximately $193 million gain from the sale of the Pratt & Whitney Power Systems business (see Note 1), as well as an approximately $25 million charge to adjust the fair value of a Pratt & Whitney joint venture investment.



(Dollars in millions)	Total Carrying				Quoted price in				Significant other				Unobservable
	Value at				active markets				observable				inputs
	December 31,				(Level 1)				inputs				(Level 3)
	2012								(Level 2)
Recurring fair value measurements:
Available-for-sale securities	$	781			$	781			$	—			$	—

Derivative assets	128				—				128				—

Derivative liabilities	(149		)		—				(149		)		—

Nonrecurring fair value measurements:
Equity method investment	432				—				432				—

Business dispositions	84				—				84				—

During the nine months ended September 30, 2012, we recorded net gains on nonrecurring fair value measurements of approximately $220 million within Other income, net from UTC Climate, Controls & Security's ongoing portfolio transformation efforts. These net gains include approximately $357 million from the sales of controlling interests in manufacturing and distribution joint ventures in Asia and Canada, of which approximately $272 million were non-cash. These gains were partially offset by $103 million of other-than-temporary impairment charges related to business dispositions and a $32 million loss on the disposition of the U.S. fire and security branch operations. In addition, we recorded a $34 million gain on the fair market measurement of the shares of Goodrich that the Company held prior to its acquisition of Goodrich.
Valuation Techniques. Our available-for-sale securities include equity investments that are traded in active markets, either domestically or internationally. They are measured at fair value using closing stock prices from active markets and are classified within Level 1 of the valuation hierarchy. Our derivative assets and liabilities are managed on the basis of net exposure to market and credit risks of each of the counterparties. The fair value for these derivative assets and liabilities is measured at the price that would be received on a net asset position for a particular risk or to transfer a net liability position for a particular risk in an orderly transaction between market participants at the measurement date. Our derivative assets and liabilities include foreign exchange contracts and commodity derivatives 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. Based on these inputs, the derivative assets and liabilities are classified within Level 2 of the valuation hierarchy. Based on our continued ability to trade securities and enter into forward contracts, we consider the markets for our fair value instruments to be active. As of September 30, 2013, there were no significant transfers in and out of Level 1 and Level 2.
As of September 30, 2013, 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, 2013 and December 31, 2012:


	30-Sep-13								December 31, 2012
(Dollars in millions)	Carrying				Fair				Carrying				Fair
	Amount				Value				Amount				Value
Long-term receivables	$	651			$	642			$	499			$	464

Customer financing notes receivable	438				388				375				371

Short-term borrowings	(303		)		(303		)		(503		)		(503		)
Long-term debt (excluding capitalized leases)	(20,837		)		(20,937		)		(22,665		)		(25,606		)
Long-term liabilities	(284		)		(257		)		(182		)		(167		)
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 as of September 30, 2013:


(Dollars in millions)	Total Fair				Quoted price in				Significant other				Unobservable
	Value at				active markets				observable inputs				inputs
	September 30,				(Level 1)				(Level 2)				(Level 3)
	2013
Long-term receivables	$	642			$	—			$	642			$	—

Customer financing notes receivable	388				—				388				—

Short-term borrowings	(303		)		—				(100		)		(203		)

Long-term debt (excluding capitalized leases)	(20,937		)		—				(20,830		)		(107		)

Long-term liabilities	(257		)		—				(257		)		—

Valuation Techniques. Our long-term receivables and customer financing notes receivable include our commercial and aerospace long-term trade, government and other receivables, leases, and notes receivable. Our long-term receivables and customer financing notes receivable are measured and presented in the table above at fair value using an income approach based on the present value of the contractual, promised or most likely cash flows discounted at observed or estimated market rate for comparable assets or liabilities that are traded in the market. Based on these inputs, long-term receivables and customer financing notes receivable are presented in the table above within Level 2 of the valuation hierarchy. Our short-term borrowings include commercial paper and other international credit facility agreements. Our long-term debt includes domestic and international notes. Commercial paper and domestic long-term notes are measured and presented in the table above at fair values based on comparable transactions and current market interest rates quoted in active markets for similar assets, and are classified within Level 2 of the valuation hierarchy. Foreign short-term borrowings and foreign long-term notes are measured and presented in the table above at fair value based on comparable transactions and rates calculated from the respective countries’ yield curves. Based on these inputs, foreign borrowings and foreign long-term notes are classified within Level 3 of the valuation hierarchy. The fair values of Accounts receivable and Accounts payable approximate the carrying amounts due to the short-term maturities of these instruments.
We had commercial aerospace financing and other contractual commitments totaling approximately $11.7 billion at September 30, 2013, including approximately $6.4 billion of IAE commitments, related to commercial aircraft and certain contractual rights to provide product on new aircraft platforms. We had commercial aerospace financing and other contractual commitments of approximately $10.9 billion at December 31, 2012, which included approximately $5.8 billion of IAE commitments. Risks associated with changes in interest rates on these commitments are mitigated by the fact that 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. The fair value of the commitments is not readily determinable.

Credit_Quality_of_Longterm_Rec

Credit Quality of Long-term Receivables	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Financing Receivables [Text Block]	Credit Quality of Long-Term Receivables
	A long-term or financing receivable represents a contractual right to receive money on demand or on fixed and determinable dates, including trade receivable balances with maturity dates greater than one year. Our long-term and financing receivables primarily represent balances related to the aerospace businesses such as long-term trade accounts receivable, leases, and notes receivable. We also have other long-term receivables in our commercial businesses; however, both the individual and aggregate amounts are not significant.
	Long-term trade accounts receivable represent amounts arising from the sale of goods and services with a contractual maturity date of greater than one year 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 long-term receivables as of September 30, 2013 and December 31, 2012:


	(Dollars in millions)	September 30,			December 31,
		2013			2012
	Long-term trade accounts receivable	$	630		$	593

	Notes and leases receivable	630			584

	Total long-term receivables	$	1,260		$	1,177

	Economic conditions and air travel influence the operating environment for most airlines, and the financial performance of our aerospace businesses is directly tied to the economic conditions of the commercial aerospace and defense industries. Additionally, the value of the collateral is also closely tied to commercial airline performance and may be subject to exposure of reduced valuation as a result of market declines. We determine a receivable is impaired when, based on current information and events, it is probable that we will be unable to collect amounts due according to the contractual terms of the receivable agreement. Factors considered in assessing collectability and risk include, but are not limited to, examination of credit quality indicators and other evaluation measures, underlying value of any collateral or security interests, significant past due balances, historical losses, and existing economic conditions.
	Long-term receivables can be considered delinquent if payment has not been received in accordance with the underlying agreement. If determined delinquent, long-term trade accounts receivable and notes and leases receivable balances accruing interest may be placed on non-accrual status. We record potential losses related to long-term receivables when identified. The reserve for credit losses on these receivables relates to specifically identified receivables that are evaluated individually for impairment. For notes and leases receivable, we determine a specific reserve for exposure based on the difference between the carrying value of the receivable and the estimated fair value of the related collateral in connection with the evaluation of credit risk and collectability. For long-term trade accounts receivable, we evaluate credit risk and collectability individually to determine if an allowance is necessary. Uncollectible long-term receivables are written-off when collection of the indebtedness has been pursued for a reasonable period of time without collection; the customer is no longer in operation; or judgment has been levied, but the underlying assets are not adequate to satisfy the indebtedness. At both September 30, 2013 and December 31, 2012, we did not have any significant balances that are considered to be delinquent, on non-accrual status, past due 90 days or more, or considered to be impaired.
	The following table provides the balance of aerospace industry long-term receivables and summarizes the associated changes in the reserve for estimated credit losses and exposure for the nine months ended September 30, 2013 and 2012, respectively:


	(Dollars in millions)	2013			2012
	Beginning balance of the reserve for credit losses and exposure as of January 1	$	60		$	70

	Provision	7			1

	Charge-offs	(13		)	—

	Recoveries	(1		)	(5		)
	Other	(3		)	(5		)
	Ending balance of the reserve for credit losses and exposure: individually evaluated for impairment as of September 30	$	50		$	61

	Ending balance of long-term receivables: individually evaluated for impairment as of September 30	$	1,260		$	1,036

	We determine credit ratings for each customer in the portfolio based upon public information and information obtained directly from our customers. We conduct a review of customer credit ratings, published historical credit default rates for different rating categories, and multiple third party aircraft value publications as a basis to validate the reasonableness of the allowance for losses on these balances quarterly or when events and circumstances warrant. The credit ratings listed below range from “A” which indicates an extremely strong capacity to meet financial obligations and the receivable is either collateralized or uncollateralized, to “D” which indicates that payment is in default and the receivable is uncollateralized. 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 following table summarizes the credit risk profile by creditworthiness category for aerospace long-term receivable balances at September 30, 2013 and December 31, 2012:


		30-Sep-13						December 31, 2012
	(Dollars in millions)	Long-term			Notes and			Long-term		Notes and
		trade accounts			leases			trade accounts		leases
		receivable			receivable			receivable		receivable
	A - (low risk, collateralized/uncollateralized)	$	607		$	30		$	569	$	26

	B - (moderate risk, collateralized/uncollateralized)	20			478			21		458

	C - (high risk, collateralized/uncollateralized)	3			122			3		100

	D - (in default, uncollateralized)	—			—			—		—

	Total	$	630		$	630		$	593	$	584

Shareowners_Equity_and_Noncont

Shareowners' Equity and Noncontrolling Interest	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Shareowners' Equity and Noncontrolling Interest	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, 2013 and 2012 is provided below:


			Quarter Ended September 30,
			2013												2012
	(Dollars in millions)		Share-owners’				Non-controlling Interest				Total				Share-owners’				Non-controlling Interest				Total
			Equity								Equity				Equity								Equity
	Equity, beginning of period		$	26,987			$	1,382			$	28,369			$	22,604			$	1,121			$	23,725

	Comprehensive income for the period:
	Net income		1,432				111				1,543				1,415				96				1,511

	Total other comprehensive income		675				17				692				1,012				23				1,035

	Total comprehensive income for the period		2,107				128				2,235				2,427				119				2,546

	Common Stock issued under employee plans		312								312				275								275

	Common Stock repurchased		(330		)						(330		)		—								—

	Treasury Stock reissued under employee plans		—								—				141								141

	Equity Units Issuance		—								—				—								—

	Dividends on Common Stock		(465		)						(465		)		(463		)						(463		)

	Dividends on ESOP Common Stock		(17		)						(17		)		(18		)						(18		)

	Dividends attributable to noncontrolling interest						(161		)		(161		)						(162		)		(162		)

	Purchase of subsidiary shares from noncontrolling interest		(17		)		(56		)		(73		)		(11		)		(1		)		(12		)
	Sale of subsidiary shares in noncontrolling interest		—				—				—				—				17				17

	Acquisition of noncontrolling interest						—				—								39				39

	Disposition of noncontrolling interest						(1		)		(1		)						—				—

	Redeemable noncontrolling interest in subsidiaries’ earnings						(1		)		(1		)						(11		)		(11		)

	Redeemable noncontrolling interest in total other comprehensive income						(1		)		(1		)						(7		)		(7		)

	Change in redemption value of put options		—								—				—								—

	Redeemable noncontrolling interest reclassification to noncontrolling interest						52				52								21				21

	Equity, end of period		$	28,577			$	1,342			$	29,919			$	24,955			$	1,136			$	26,091




			Nine Months Ended September 30,
			2013												2012
	(Dollars in millions)		Share-owners’				Non-controlling				Total				Share-owners’				Non-controlling				Total
			Equity				Interest				Equity				Equity				Interest				Equity
	Equity, beginning of period		$	25,914			$	1,155			$	27,069			$	21,880			$	940			$	22,820

	Comprehensive income for the period:
	Net income		4,258				286				4,544				3,073				267				3,340

	Total other comprehensive income (loss)		123				(9		)		114				827				4				831

	Total comprehensive income for the period		4,381				277				4,658				3,900				271				4,171

Common Stock issued under employee plans		764								764				608								608

Common Stock repurchased		(1,000		)						(1,000		)		—								—

Treasury Stock reissued under employee plans		—								—				141								141

Equity Units Issuance		—								—				(216		)						(216		)

Dividends on Common Stock		(1,395		)						(1,395		)		(1,288		)						(1,288		)
Dividends on ESOP Common Stock		(51		)						(51		)		(50		)						(50		)
Dividends attributable to noncontrolling interest						(288		)		(288		)						(292		)		(292		)
Purchase of subsidiary shares from noncontrolling interest		(36		)		(67		)		(103		)		(19		)		(4		)		(23		)
Sale of subsidiary shares in noncontrolling interest		—				242				242				—				52				52

Acquisition of noncontrolling interest						—				—								94				94

Disposition of noncontrolling interest						(6		)		(6		)						(4		)		(4		)
Redeemable noncontrolling interest in subsidiaries’ earnings						(3		)		(3		)						(22		)		(22		)
Redeemable noncontrolling interest in total other comprehensive income						5				5								1				1

Change in redemption value of put options		—								—				(1		)						(1		)

Redeemable noncontrolling interest reclassification to noncontrolling interest						27				27								100				100

Equity, end of period		$	28,577			$	1,342			$	29,919			$	24,955			$	1,136			$	26,091

As of January 1, 2013, we adopted the provisions of the FASB issued Accounting Standards Update ("ASU") No. 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income." As a result of this adoption, we have disclosed below the significant items reclassified to net income in their entirety during the period.
A summary of the changes in each component of accumulated other comprehensive loss, net of tax for the nine months ended September 30, 2013 are provided below:


(Dollars in millions)	Foreign				Defined				Unrealized Gains				Unrealized				Accumulated
	Currency				Benefit				(Losses) on				Hedging				Other
	Translation				Pension and				Available-for-Sale				(Losses)				Comprehensive
					Post-				Securities				Gains				(Loss) Income
					retirement
					Plans
Balance at December 31, 2012	$	654			$	(6,250	)		$	145			$	3			$	(5,448	)

Other comprehensive (loss) income before reclassifications	(439		)		27				140				(48		)		(320		)

Amounts reclassified from accumulated other comprehensive loss (income)	31				445				(50		)		17				443

Balance at September 30, 2013	$	246			$	(5,778	)		$	235			$	(28	)		$	(5,325	)

Details of the reclassification out of accumulated other comprehensive loss for the quarter and nine months ended September 30, 2013 is provided below:


Details about Accumulated Other Comprehensive Loss		Quarter Ended September 30, 2013				Nine Months Ended September 30, 2013				Affected Line Item in the Condensed Consolidated Statement of Comprehensive Income
Components Reclassified to Net Income
(Dollars in millions)		Income (Expense)				Income (Expense)
Foreign Currency Translation:
Recognized due to business disposition		$	1			$	(31	)		Other income, net

Defined Benefit Pension and Post-retirement Plans:
Amortization of prior-service costs and transition obligation		$	10			$	34			Note (1)

Recognized actuarial net loss		(236		)		(714		)		Note (1)
Total before tax		(226		)		(680		)
Tax benefit		71				235				Income tax expense

Net of tax		$	(155	)		$	(445	)
Unrealized Gains on Available-for-Sale Securities:
Realized gain on sale of securities, before tax		$	27			$	81			Other income, net

Tax expense		(10		)		(31		)		Income tax expense
Net of tax		$	17			$	50

Unrealized Hedging (Losses) Gains:
Foreign exchange contracts		$	1			$	(22	)		Product sales

Other contracts		—				2				Other income, net

Total before tax		1				(20		)

Tax (expense) benefit		(1		)		3				Income tax expense

Net of tax		$	—			$	(17	)

(1) These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 7 for additional details).
All noncontrolling interests with redemption features, such as put options, that are not solely within our control (redeemable noncontrolling interests) are reported in the mezzanine section of the Condensed Consolidated Balance Sheet, between liabilities and equity, at the greater of redemption value or initial carrying value. A summary of the changes in redeemable noncontrolling interest recorded in the mezzanine section of the Condensed Consolidated Balance Sheet for the quarters and nine months ended September 30, 2013 and 2012 is provided below:


	Quarter Ended September 30,								Nine Months Ended September 30,
(Dollars in millions)	2013				2012				2013				2012
Redeemable noncontrolling interest, beginning of period	$	174			$	238			$	238			$	358

Net income	1				11				3				22

Foreign currency translation, net	1				7				(5		)		(1		)

Dividends attributable to noncontrolling interest	—				(2		)		(3		)		(13		)

Purchase of subsidiary shares from	—				—				—				(34		)
noncontrolling interest
Disposition of noncontrolling interest	—				—				(82		)		—

Change in redemption value of put options	—				—				—				1

Redeemable noncontrolling interest reclassification to noncontrolling interest	(52		)		(21		)		(27		)		(100		)
Redeemable noncontrolling interest, end of period	$	124			$	233			$	124			$	233

Changes in noncontrolling interests that do not result in a change of control and where there is a difference between fair value and carrying value are accounted for as equity transactions. A summary of these changes in ownership interests in subsidiaries and the effect on shareowners’ equity for the quarters and nine months ended September 30, 2013 and 2012 is provided below:


	Quarter Ended September 30,								Nine Months Ended September 30,
(Dollars in millions)	2013				2012				2013				2012
Net income attributable to common shareowners	$	1,432			$	1,415			$	4,258			$	3,073

Transfers to noncontrolling interests:
Decrease in common stock for purchase of subsidiary shares	(17		)		(11		)		(36		)		(19		)
Change from net income attributable to common shareowners and transfers to noncontrolling interests	$	1,415			$	1,404			$	4,222			$	3,054

Guarantees

Guarantees	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Guarantees	Guarantees
	We extend a variety of financial, market value and product performance guarantees to third parties. As disclosed in Note 2, on June 14, 2013 we completed the sale of substantially all operations of Rocketdyne to GenCorp Inc. Following the sale, certain guarantees of Rocketdyne's performance under existing contracts remain in place, which resulted in an increase in our performance guarantees of approximately $124 million, with no associated significant carrying amount of a liability as of September 30, 2013. There have been no other material changes to guarantees outstanding since December 31, 2012.
	The changes in the carrying amount of service and product warranties and product performance guarantees for the nine months ended September 30, 2013 and 2012 are as follows:


	(Dollars in millions)	2013			2012
	Balance as of January 1	$	1,332		$	1,468

	Warranties and performance guarantees issued	232			235

	Settlements made	(223		)	(217		)
	Other	22			(165		)

	Balance as of September 30	$	1,363		$	1,321

	The decrease reflected in “Other” during the nine months ended September 30, 2012 primarily reflects the impact of warranty reserves reclassified to Liabilities held for sale, as part of the Clipper disposition, partially offset by an increase in warranty reserves arising out of our acquisition of Goodrich. See Notes 1 and 2 for further discussion.

Contingent_Liabilities

Contingent Liabilities	9 Months Ended
Contingent Liabilities	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Contingent Liabilities	Contingent Liabilities
	Summarized below are the matters previously described in Note 18 of the Notes to the Consolidated Financial Statements in our 2012 Annual Report, incorporated by reference in our 2012 Form 10-K, updated as applicable.
	Environmental. Our operations are subject to environmental regulation by federal, state and local authorities in the U.S. and regulatory authorities with jurisdiction over our non-U.S. operations. We accrue for the costs of environmental investigatory, remediation, operating and maintenance costs when it is probable that a liability has been incurred and the amount can be reasonably estimated. The most likely cost to be incurred is accrued based on an evaluation of currently available facts with respect to each individual site, including existing technology, current laws and regulations and prior remediation experience. Where no amount within a range of estimates is more likely, we accrue the minimum. For sites with multiple responsible parties, we consider our likely proportionate share of the anticipated remediation costs and the ability of the other parties to fulfill their obligations in establishing a provision for those costs. We discount liabilities with fixed or reliably determinable future cash payments. We do not reduce accrued environmental liabilities by potential insurance reimbursements. We periodically reassess these accrued amounts. We believe that the likelihood of incurring losses materially in excess of amounts accrued is remote.
	In conjunction with the completion of our acquisition of Goodrich on July 26, 2012, we recorded additional environmental reserves of $325 million. See Note 1 for further discussion.
	Government. 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. If we or one of our business units were charged with wrongdoing as a result of any of these investigations or other government investigations (including violations of certain environmental or export laws) the U.S. Government could suspend us from bidding on or receiving awards of new U.S. Government contracts pending the completion of legal proceedings. If convicted or found liable, the U.S. Government could fine and debar us from new U.S. Government contracting for a period generally not to exceed three years. The U.S. Government could void any contracts found to be tainted by fraud.
	Our contracts with the U.S. Government are also subject to audits. Like many defense contractors, we have received audit reports, which recommend that certain contract prices should be reduced to comply with various government regulations. Some of these audit reports involve substantial amounts. We have made voluntary refunds in those cases we believe appropriate, have settled some allegations and continue to litigate certain other cases. In addition, we accrue for liabilities associated with those matters that are probable and can be reasonably estimated. The most likely settlement amount to be incurred is accrued based upon a range of estimates. Where no amount within a range of estimates is more likely, then we accrue the minimum amount.
	As previously disclosed, the United States government sued us in 1999 in the United States District Court for the Southern District of Ohio, claiming that Pratt & Whitney violated the civil False Claims Act and common law. The claims relate to the “Fighter Engine Competition” between Pratt & Whitney's F100 engine and General Electric's F110 engine. The government alleged that it overpaid for F100 engines under contracts awarded by the U.S. Air Force in fiscal years 1985 through 1990 because Pratt & Whitney inflated its estimated costs for some purchased parts and withheld data that would have revealed the overstatements. At trial, which ended in April, 2005, the government claimed Pratt & Whitney's liability to be approximately $624 million. On August 1, 2008, the trial court held that the Air Force had not suffered any actual damages because Pratt & Whitney had made significant price concessions after the alleged overstatements were made. However, the trial court judge found that Pratt & Whitney violated the False Claims Act due to inaccurate statements contained in its 1983 initial engine pricing proposal. In the absence of actual damages, the trial court awarded the government the maximum civil penalty of approximately $7 million, or $10,000 for each of the 709 invoices Pratt & Whitney submitted in 1989 and later under the contracts. In September 2008, both the government and UTC appealed the decision to the United States Court of Appeals for the Sixth Circuit. On November 18, 2010, the Sixth Circuit affirmed Pratt & Whitney's liability under the False Claims Act, but remanded the case to the trial court for further proceedings on the issues of False Claims Act damages and common law liability and damages.
	On June 18, 2012, the trial court found that Pratt & Whitney had breached obligations imposed by common law based on the same conduct with respect to which the court previously found liability under the False Claims Act. Under the common law claims, the U.S. Air Force is entitled to seek damages for events occurring before March 3, 1989, which are not recoverable under the False Claims Act.
	On June 17, 2013, the trial court awarded the government approximately $473 million in damages and penalties, plus prejudgment interest in an amount to be determined. On July 1, 2013, the trial court, after determining the amount of prejudgment interest, entered judgment in favor of the government in the amount of approximately $664 million. The trial court also awarded postjudgment interest on the full amount of the judgment to accrue from July 2, 2013, at the federal variable interest rate determined pursuant to 28 U.S.C. § 1961. The judgment included four different components of damages: (1) common law damages of approximately $109 million; (2) prejudgment interest on common law damages of approximately $191 million; (3) False Claims Act treble damages of approximately $357 million; and (4) penalties of approximately $7 million. The penalty component of the judgment previously was affirmed by the United States Court of Appeals in 2010.
	We strongly disagree with the trial court's analysis and conclusions. We filed an appeal from the judgment to the United States Court of Appeals for the Sixth Circuit on August 26, 2013. Based on our analysis, we continue to believe that there is no basis for any common law liability for the inaccurate statements. We also believe that the government suffered no actual damages as a result of the inaccurate statements made in 1983 and, therefore, there is no basis in fact or law for the award of common law damages, prejudgment interest or False Claims Act treble damages. If, contrary to our expectations, all or any portion of the judgment should ultimately be affirmed, we estimate a range of possible loss from approximately $24 million to $657 million in excess of amounts previously accrued, plus postjudgment interest. The outcome of this matter could result in a material adverse effect on our results of operations in the period in which a liability would be recognized and cash flows for the period in which damages would be paid.
	As previously disclosed, in December 2008, the Department of Defense (DOD) issued a contract claim against Sikorsky to recover overpayments the DOD alleges that it made to Sikorsky since January 2003 in connection with cost accounting changes approved by the DOD and implemented by Sikorsky in 1999 and 2006. These changes relate to the calculation of material overhead rates in government contracts. The DOD claimed that Sikorsky's liability was approximately $96 million (including interest through September 30, 2013). We believed this claim was without merit and Sikorsky filed an appeal in December 2009 with the U.S. Court of Federal Claims. Trial in the matter concluded in January 2013, and on March 22, 2013, the U.S. Court of Federal Claims issued a written decision in favor of Sikorsky determining that the DOD had failed to prove its claims because Sikorsky's calculation of material overhead complied with the cost accounting standards. While the DOD has appealed this decision, we do not believe the ultimate resolution of this matter will have a material adverse effect on our competitive position, results of operations, cash flows or financial condition.
	Tax Matters. As previously disclosed, UTC is involved in litigation in Germany concerning €204 million (approximately $275 million) of tax benefits that we have claimed related to a 1998 reorganization of the corporate structure of Otis operations in Germany. A portion of these tax benefits were disallowed by the local German Tax Office on July 5, 2012, as a result of the audit of tax years 1999 to 2000. The legal and factual issues relating to the denial of the tax benefits center on the interpretation and application of a German tax law. On August 3, 2012, the Company filed suit in the local German tax court and intends to litigate vigorously the matter to conclusion. We do not believe the resolution of this matter will have a material adverse effect on our results of operations, cash flows or financial condition.
	UTC has also been involved in administrative review proceedings with the French Revenue Authority concerning €237 million (approximately $320 million) related to certain deductions claimed in France for tax years 2008 through 2011 that the French Revenue Authority has proposed to disallow. This is a recurring issue and it is expected that similar challenges will be raised in subsequent tax years until the issue is resolved. Resolution discussions with the French Revenue Authority on this matter have been unsuccessful to date and UTC may be required to pursue the defense of the issue through litigation, which could be commenced as early as the fourth quarter of 2013. UTC intends to assert a vigorous defense and believes it should prevail on the issue. Accordingly, no accrual has been made for this matter.
	See “Note 6 Income Taxes” of our Condensed Consolidated Financial Statements for further discussion of these tax matters.
	Other. 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.
	Like many other industrial companies in recent years, we or our subsidiaries are named as a defendant in lawsuits alleging personal injury as a result of exposure to asbestos integrated into certain of our products or 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 covered by insurance or other forms of indemnity or have been dismissed without payment. The remainder of the closed cases have been resolved for amounts that are not material individually or in the aggregate. While insurance coverage litigation is pending against a number of Goodrich insurers, based on information currently available we do not believe that resolution of asbestos-related matters will have a material adverse effect upon our competitive position, results of operations, cash flows or financial condition.
	We are involved in a number of other legal proceedings, investigations and other contingency matters, including government audit matters, environmental investigatory, remediation, operating and maintenance costs, performance guarantees, self-insurance programs and matters arising out of the normal course of business. We are also subject to a number of routine lawsuits, investigations and claims (some of which involve substantial amounts) arising out of the ordinary course of our business. Many of these proceedings are at preliminary stages, and many of these cases seek an indeterminate amount of damages. We regularly evaluate the status of legal proceedings in which we are involved, to assess whether a loss is probable and reasonably estimable in light of the facts and circumstances known to us at a particular point in time or there is a reasonable possibility that a loss or additional loss may have been incurred and determine if accruals and related disclosures are appropriate. The Company has established reserves for several hundred of its legal proceedings and other matters. 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. With respect to any additional losses that may be incurred in excess of those accrued, either they are considered not material or we do not believe that a range of reasonably possible losses (defined by the relevant accounting literature to include all potential losses other than those deemed “remote”) can be determined. 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.
	All forward-looking statements concerning the possible or anticipated outcome of environmental, investigatory, litigation proceedings and other contingency matters involve risks and uncertainties that could cause actual results to differ materially from those expressed or implied in the forward-looking statements. For further information as to these risks and uncertainties, see “Cautionary Note Concerning Factors That May Affect Future Results” and Part II, Item 1A, “Risk Factors” in this Form 10-Q.

Segment_Financial_Data

Segment Financial Data	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Segment Financial Data	Segment Financial Data
	Our operations are classified into five principal segments: Otis, UTC Climate, Controls & Security, Pratt & Whitney, UTC Aerospace Systems and Sikorsky. 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. On September 23, 2013, we announced the formation of UTC Building and Industrial Systems, a new organizational structure consisting of Otis and UTC Climate, Controls & Security. This new organizational structure is intended to enhance our ability to deliver more integrated solutions to our customers and accelerate innovation in smart building technologies and sustainable designs. Otis and UTC Climate, Controls & Security each will continue to report their financial and operational results as separate segments, which is consistent with how we will allocate resources and measure the financial performance of these businesses. Subsequent to the completion of our acquisition of Goodrich on July 26, 2012, the Goodrich businesses were combined with the legacy Hamilton Sundstrand businesses to form the new UTC Aerospace Systems segment. Effective July 1, 2012, the Auxiliary Power Unit (APU) business of UTC Aerospace Systems was transferred to the Pratt & Whitney business segment. The APU business designs and manufactures a variety of products for commercial and military aircraft. Annual sales for the APU business are approximately $600 million. The reclassification has been made prospectively; prior year segment results have not been restated for the transfer of the business.
	Results for the quarters ended September 30, 2013 and 2012 are as follows:


		Net Sales						Operating Profits						Operating Profit Margins
	(Dollars in millions)	2013			2012			2013			2012			2013		2012
	Otis	$	3,188		$	3,054		$	681		$	651		21.4	%	21.3	%

	UTC Climate, Controls & Security	4,237			4,259			696			632			16.4	%	14.8	%

	Pratt & Whitney	3,386			3,574			439			409			13	%	11.4	%

	UTC Aerospace Systems	3,312			2,670			501			271			15.1	%	10.1	%

	Sikorsky	1,541			1,649			159			203			10.3	%	12.3	%

	Total segments	15,664			15,206			2,476			2,166			15.8	%	14.2	%

	Eliminations and other	(202		)	(164		)	7			(22		)

	General corporate expenses	—			—			(117		)	(103		)

	Consolidated	$	15,462		$	15,042		$	2,366		$	2,041		15.3	%	13.6	%

	Results for the nine months ended September 30, 2013 and 2012 are as follows:


		Net Sales						Operating Profits						Operating Profit Margins
	(Dollars in millions)	2013			2012			2013			2012			2013		2012
	Otis	$	9,140		$	8,851		$	1,906		$	1,868		20.9	%	21.1	%

	UTC Climate, Controls & Security	12,617			12,943			1,968			1,965			15.6	%	15.2	%

	Pratt & Whitney	10,412			10,073			1,412			1,225			13.6	%	12.2	%

	UTC Aerospace Systems	9,896			5,160			1,501			680			15.2	%	13.2	%

	Sikorsky	4,356			4,615			405			552			9.3	%	12	%

	Total segments	46,421			41,642			7,192			6,290			15.5	%	15.1	%

	Eliminations and other	(554		)	(377		)	32			(54		)

	General corporate expenses	—			—			(345		)	(303		)

	Consolidated	$	45,867		$	41,265		$	6,879		$	5,933		15	%	14.4	%

	See Note 8 to the Condensed Consolidated Financial Statements for a discussion of restructuring costs included in segment operating results.

Accounting_Pronouncements

Accounting Pronouncements	9 Months Ended
Accounting Pronouncements	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Accounting Pronouncements	Accounting Pronouncements
	In March 2013, the FASB issued ASU No. 2013-05, "Parent's Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Group of Assets within a Foreign Entity or of an Investment in a Foreign Entity." This ASU is intended to eliminate diversity in practice on the release of cumulative translation adjustment into net income when a parent either sells a part or all of its investment in a foreign entity or no longer holds a controlling financial interest. In addition, the amendments in this ASU resolve the diversity in practice for the treatment of business combinations achieved in stages (sometimes also referred to as step acquisitions) involving a foreign entity. The provisions of this ASU are effective for interim and annual periods beginning after December 15, 2013 and must be applied prospectively. This ASU is not expected to have a material impact on our financial statements or disclosures.
	In July 2013, the FASB issued ASU No. 2013-10, "Inclusion of the Fed Funds Effective Swap Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes." This ASU is intended to permit the Fed Funds Effective Swap Rate to be used as a U.S. benchmark interest rate for hedge accounting purposes under FASB ASC Topic 815, "Derivatives and Hedging", in addition to UST and LIBOR, as well as to remove the restriction on using different benchmark rates for similar hedges. The provisions of this ASU are effective for new or redesignated hedging relationships entered into on or after July 17, 2013. This ASU is not expected to have a material effect on our financial statements or disclosures.

	In July 2013, the FASB issued ASU No. 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists." This ASU is intended to provide guidance and reduce diversity in practice in the presentation of an unrecognized tax benefit when a tax loss or credit carryforward exists. The provisions of this ASU are effective for periods beginning after December 15, 2013 and must be applied prospectively for unrecognized tax benefits that exist at the effective date. Early adoption is permitted. There are no material effects on, or changes to, our financial statements or disclosures as a result of this ASU.

Acquisitions_Dispositions_Good1

Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]

	(Dollars in millions)
	Cash and cash equivalents	$	538
	Cash and cash equivalents	$	538
	Accounts receivable, net	1,205
	Accounts receivable, net	1,205
	Inventories and contracts in progress, net	1,673
	Inventories and contracts in progress, net	1,673
	Future income tax benefits, current	515
	Future income tax benefits, current	515
	Other assets, current	647
	Other assets, current	647
	Fixed assets	2,209
	Fixed assets	2,209
	Intangible assets:
	Customer relationships and related program assets	8,550
	Customer relationships and related program assets	8,550
	Trademarks	1,550
	Trademarks	1,550
	Other assets	1,501
	Other assets	1,501
	Short-term borrowings	(84		)
	Accounts payable	(587		)
	Accrued liabilities	(1,919		)
	Long-term debt	(2,961		)
	Future pension and postretirement benefit obligations	(1,743		)
	Other long-term liabilities:
	Customer contractual obligations	(2,200		)
	Other long-term liabilities	(4,013		)
	Noncontrolling interest	(41		)
	Total identifiable net assets	4,840
	Total identifiable net assets	4,840
	Goodwill	11,580
	Goodwill	11,580
	Total consideration transferred	$	16,420
	Total consideration transferred	$	16,420
Business Acquisition Pro Forma Information [Text Block]

	(Dollars in millions, except per share amounts)	Quarter Ended September 30, 2012			Nine Months Ended September 30, 2012
	Net sales	$	15,512		$	45,730
	Net sales	$	15,512		$	45,730
	Net income attributable to common shareowners from continuing operations	1,315			4,145
		1,315			4,145
	Basic earnings per share of common stock from continuing operations	1.47			4.63
		1.47			4.63
	Diluted earnings per share of common stock from continuing operations	1.45			4.57
		1.45			4.57
Business Acquisition Pro Forma Information Nonrecurring Adjustments [Table Text Block]

	(Dollars in millions)	Quarter Ended September 30, 2012			Nine Months Ended September 30, 2012
	Amortization of inventory fair value adjustment1	$	(49	)	$	(49	)
	Amortization of acquired Goodrich intangible assets, net2	15			107
	Amortization of acquired Goodrich intangible assets, net2	15			107
	Utilization of contractual customer obligation3	(10		)	(103		)
	Interest expense incurred on acquisition financing, net4	(3		)	63
	Interest expense incurred on acquisition financing, net4	(3		)	63
	1 Removed the expense for the amortization of inventory fair value adjustments recognized in the quarter ended September 30, 2012, as the corresponding inventory would have been completely sold during the first two quarters of 2011.
	2 Added the additional amortization of the acquired Goodrich intangible assets recognized at fair value in purchase accounting and eliminated the historical Goodrich intangible asset amortization expense.
	3 Added the additional utilization of the Goodrich contractual customer obligation recognized in purchase accounting.
	4 Added the additional interest expense for the indebtedness we incurred to finance the acquisition of Goodrich and reduced interest expense for the debt fair value adjustment which would have been amortized.
Schedule of Variable Interest Entities [Table Text Block]

	(Dollars in millions)
	Current assets	$	1,636
	Current assets	$	1,636
	Noncurrent assets	1,023
	Noncurrent assets	1,023
	Total assets	$	2,659
	Total assets	$	2,659

	Current liabilities	$	1,821
	Current liabilities	$	1,821
	Noncurrent liabilities	1,067
	Noncurrent liabilities	1,067
	Total liabilities	$	2,888
	Total liabilities	$	2,888
Schedule of Goodwill [Text Block]

	(Dollars in millions)	Balance as of			Goodwill			Foreign currency translation and other			Balance as of
	(Dollars in millions)	January 1, 2013			resulting from business combinations			Foreign currency translation and other			September 30, 2013
	Otis	$	1,583		$	139		$	(7	)	$	1,715
	Otis	$	1,583		$	139		$	(7	)	$	1,715
	UTC Climate, Controls & Security	9,868			2			(149		)	9,721
	UTC Climate, Controls & Security	9,868			2			(149		)	9,721
	Pratt & Whitney	1,238			—			35			1,273
	Pratt & Whitney	1,238			—			35			1,273
	UTC Aerospace Systems	14,754			301			(20		)	15,035
	UTC Aerospace Systems	14,754			301			(20		)	15,035
	Sikorsky	353			—			(1		)	352
	Sikorsky	353			—			(1		)	352
	Total Segments	27,796			442			(142		)	28,096
	Total Segments	27,796			442			(142		)	28,096
	Eliminations and other	5			—			(1		)	4
	Eliminations and other	5			—			(1		)	4
	Total	$	27,801		$	442		$	(143	)	$	28,100
	Total	$	27,801		$	442		$	(143	)	$	28,100
Intangible Assets Disclosure [Text Block]

		30-Sep-13						December 31, 2012
	(Dollars in millions)	Gross Amount			Accumulated			Gross Amount			Accumulated
	(Dollars in millions)	Gross Amount			Amortization			Gross Amount			Amortization
	Amortized:
	Service portfolios	$	2,235		$	(1,272	)	$	2,127		$	(1,202	)
	Service portfolios	$	2,235		$	(1,272	)	$	2,127		$	(1,202	)
	Patents and trademarks	382			(178		)	412			(167		)
	Patents and trademarks	382			(178		)	412			(167		)
	IAE collaboration	2,093			—			1,526			—
	IAE collaboration	2,093			—			1,526			—
	Customer relationships and other	12,025			(2,064		)	11,901			(1,718		)
	Customer relationships and other	12,025			(2,064		)	11,901			(1,718		)
		16,735			(3,514		)	15,966			(3,087		)
		16,735			(3,514		)	15,966			(3,087		)
	Unamortized:
	Trademarks and other	2,274			—			2,310			—
	Trademarks and other	2,274			—			2,310			—
	Total	$	19,009		$	(3,514	)	$	18,276		$	(3,087	)
	Total	$	19,009		$	(3,514	)	$	18,276		$	(3,087	)
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

	(Dollars in millions)		Remaining 2013			2014			2015			2016		2017		2018
	Amortization expense		$	171		$	681		$	645		$	626	$	619	$	648
	Amortization expense		$	171		$	681		$	645		$	626	$	619	$	648

Discontinued_Operations_Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Text Block]

		Quarter Ended September 30,					Nine Months Ended September 30,
	(Dollars in millions)	2013		2012			2013			2012
	Discontinued Operations:
	Net sales	$	—	$	522		$	309		$	1,607

	Income (loss) from operations	$	—	$	91		$	63		$	(1,017	)

	Income tax expense	—		(30		)	(32		)	(38		)

	Income (loss) from operations, net of income taxes	—		61			31			(1,055		)

	Gain (loss) on disposal	10		(26		)	(30		)	(62		)

	Income tax benefit	7		135			20			294

	Net income (loss) on discontinued operations	$	17	$	170		$	21		$	(823	)

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [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)	2013		2012		2013		2012
	Net income attributable to common shareowners:
	Net income from continuing operations	$	1,415	$	1,247	$	4,237	$	3,902

	Net income (loss) from discontinued operations	17		168		21		(829		)

	Net income attributable to common shareowners	$	1,432	$	1,415	$	4,258	$	3,073

	Basic weighted average number of shares outstanding	900.8		896.3		900.9		893.6

	Stock awards and equity units	14.7		10.9		13.2		11.7

	Diluted weighted average number of shares outstanding	915.5		907.2		914.1		905.3

	Earnings (Loss) Per Share of Common Stock - Basic:
	Net income from continuing operations	$	1.57	$	1.39	$	4.7	$	4.37

	Net income (loss) from discontinued operations	0.02		0.19		0.02		(0.93		)

	Net income attributable to common shareowners	1.59		1.58		4.73		3.44

	Earnings (Loss) Per Share of Common Stock - Diluted:
	Net income from continuing operations	$	1.55	$	1.37	$	4.64	$	4.31

	Net income (loss) from discontinued operations	0.02		0.19		0.02		(0.92		)

	Net income attributable to common shareowners	1.57		1.56		4.66		3.39

Inventories_and_Contracts_in_P1

Inventories and Contracts in Progress (Tables)	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Inventory [Text Block]

	(Dollars in millions)	September 30,			December 31,
		2013			2012
	Raw materials	$	1,967		$	1,861

	Work-in-process	4,864			4,151

	Finished goods	3,556			3,205

	Contracts in progress	8,038			7,354

		18,425			16,571

	Less:
	Progress payments, secured by lien, on U.S. Government contracts	(379		)	(274		)
	Billings on contracts in progress	(7,281		)	(6,760		)
		$	10,765		$	9,537

Borrowings_and_Lines_of_Credit1

Borrowings and Lines of Credit (Tables)	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Short Term Debt [Text Block]

	(Dollars in millions)	September 30,			December 31,
		2013			2012
	Commercial paper	$	100		$	320

	Other borrowings	203			183

	Total short-term borrowings	$	303		$	503

Long-term Debt [Text Block]

	(Dollars in millions)	September 30,			December 31,
		2013			2012
	LIBOR§ plus 0.270% floating rate notes due 2013	$	1,000		$	1,000

	LIBOR§ plus 0.500% floating rate notes due 2015	500			500

	1.200% notes due 2015*	—			1,000

	4.875% notes due 2015*	1,200			1,200

	6.290% notes due 2016‡	188			291

	5.375% notes due 2017*	1,000			1,000

	1.800% notes due 2017*	1,500			1,500

	6.800% notes due 2018‡	99			99

	6.125% notes due 2019‡	—			300

	6.125% notes due 2019*	1,250			1,250

	8.875% notes due 2019	272			272

	4.500% notes due 2020*	1,250			1,250

	4.875% notes due 2020‡	171			171

	3.600% notes due 2021‡	—			295

	8.750% notes due 2021	250			250

	3.100% notes due 2022*	2,300			2,300

	1.550% junior subordinated notes due 2022†	1,100			1,100

	7.100% notes due 2027‡	141			141

	6.700% notes due 2028	400			400

	7.500% notes due 2029*	550			550

	5.400% notes due 2035*	600			600

	6.050% notes due 2036*	600			600

	6.800% notes due 2036‡	134			134

	7.000% notes due 2038‡	159			159

	6.125% notes due 2038*	1,000			1,000

	5.700% notes due 2040*	1,000			1,000

	4.500% notes due 2042*	3,500			3,500

	Project financing obligations	69			100

	Other (including capitalized leases and discounts)‡	438			403

	Total principal long-term debt	20,671			22,365

Other (fair market value adjustment)‡	214			353

Total long-term debt	20,885			22,718

Less: current portion	1,100			1,121

Long-term debt, net of current portion	$	19,785		$	21,597

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Schedule of Defined Benefit Plans Disclosures [Text Block]

		Quarter Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions)	2013			2012			2013			2012
	Defined Benefit Plans	$	21		$	209		$	72		$	233

	Defined Contribution Plans	$	75		$	65		$	258		$	183



		Pension Benefits						Other Postretirement Benefits
		Quarter Ended						Quarter Ended
		September 30,						September 30,
	(Dollars in millions)	2013			2012			2013			2012
	Service cost	$	142		$	131		$	1		$	1

	Interest cost	343			344			9			10

	Expected return on plan assets	(526		)	(503		)	—			—

	Amortization	(8		)	(7		)	(2		)	(2		)
	Recognized actuarial net loss (gain)	237			180			(1		)	(1		)

	Net settlement and curtailment loss	—			15			—			—

	Total net periodic benefit cost	$	188		$	160		$	7		$	8



		Pension Benefits						Other Postretirement Benefits
		Nine Months Ended						Nine Months Ended
		September 30,						September 30,
	(Dollars in millions)	2013			2012			2013			2012
	Service cost	$	428		$	361		$	3		$	3

	Interest cost	1,029			970			28			26

	Expected return on plan assets	(1,579		)	(1,415		)	—			—

	Amortization	(26		)	(13		)	(8		)	(2		)
	Recognized actuarial net loss (gain)	717			541			(3		)	(5		)

	Net settlement and curtailment (gain) loss	(17		)	50			—			—

	Total net periodic benefit cost	$	552		$	494		$	20		$	22

Restructuring_and_Other_Costs_

Restructuring and Other Costs (Tables)	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Schedule of Restructuring and Related Costs [Text Block]

	(Dollars in millions)	Severance				Asset				Facility Exit,				Total
						Write-Downs				Lease
										Termination and
										Other Costs
	Expected costs	$	477			$	15			$	168			$	660

	Costs incurred through December 31, 2012	(452		)		(14		)		(110		)		(576		)
	Costs incurred - quarter ended March 31, 2013	(18		)		(1		)		(10		)		(29		)
	Costs incurred - quarter ended June 30, 2013	1				—				(10		)		(9		)

	Costs incurred - quarter ended September 30, 2013	3				—				(9		)		(6		)

	Balance at September 30, 2013	$	11			$	—			$	29			$	40



	(Dollars in millions)	Expected				Costs incurred through				Costs incurred Quarter ended				Costs incurred Quarter ended June 30, 2013				Costs incurred Quarter ended September 30, 2013			Remaining Costs at September 30, 2013
		Costs				31-Dec-12				31-Mar-13
	Otis	$	157			$	(146	)		$	(1	)		$	(2	)		$	(1	)	$	7

	UTC Climate, Controls & Security	149				(123		)		(14		)		(1		)		1			12

	Pratt & Whitney	98				(94		)		(1		)		—				—			3

	UTC Aerospace Systems	154				(121		)		(8		)		(5		)		(5		)	15

	Sikorsky	57				(47		)		(5		)		(1		)		(1		)	3

	Eliminations and other	19				(19		)		—				—				—			—

	Discontinued operations	26				(26		)		—				—				—			—

	Total	$	660			$	(576	)		$	(29	)		$	(9	)		$	(6	)	$	40



	(Dollars in millions)
	Otis	$	68

	UTC Climate, Controls & Security	66

	Pratt & Whitney	122

	UTC Aerospace Systems	65

	Sikorsky	25

	Eliminations and other	(1		)
	Restructuring costs recorded within continuing operations	345

	Restructuring costs recorded within discontinued operations	(2		)
	Total	$	343



	(Dollars in millions)		Severance				Asset				Facility Exit,				Total
							Write-Downs				Lease
											Termination and
											Other Costs
	Expected costs		$	287			$	13			$	41			$	341

	Costs incurred - quarter ended March 31, 2013		(19		)		—				(1		)		(20		)

Costs incurred - quarter ended June 30, 2013		(163		)		(12		)		(7		)		(182		)
Costs incurred - quarter ended September 30, 2013		(89		)		(1		)		(6		)		(96		)
Balance at September 30, 2013		$	16			$	—			$	27			$	43



(Dollars in millions)	Expected				Costs incurred Quarter ended				Costs incurred Quarter ended June 30, 2013				Costs incurred Quarter ended September 30, 2013				Remaining Costs at September 30, 2013
	Costs				31-Mar-13
Otis	$	61			$	(6	)		$	(35	)		$	(12	)		$	8

UTC Climate, Controls & Security	81				(8		)		(18		)		(34		)		21

Pratt & Whitney	127				(6		)		(93		)		(22		)		6

UTC Aerospace Systems	55				—				(28		)		(19		)		8

Sikorsky	18				—				(8		)		(10		)		—

Eliminations and other	(1		)		—				—				1				—

Total	$	341			$	(20	)		$	(182	)		$	(96	)		$	43

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

	(Dollars in millions)	Severance				Asset				Facility Exit,				Total
						Write-Downs				Lease
										Termination and
										Other Costs
	Restructuring accruals at July 1, 2013	$	142			$	—			$	47			$	189

	Net pre-tax restructuring costs	(3		)		—				9				6

	Utilization and foreign exchange	(32		)		—				(13		)		(45		)

	Balance at September 30, 2013	$	107			$	—			$	43			$	150



	(Dollars in millions)		Severance				Asset				Facility Exit,				Total
							Write-Downs				Lease
											Termination and
											Other Costs
	Restructuring accruals at July 1, 2013		$	153			$	—			$	7			$	160

	Net pre-tax restructuring costs		89				1				6				96

	Utilization and foreign exchange		(108		)		(1		)		(2		)		(111		)
	Balance at September 30, 2013		$	134			$	—			$	11			$	145

Financial_Instruments_Tables

Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Text Block]

		30-Sep-13						December 31, 2012
	(Dollars in millions)	Derivatives			Derivatives not			Derivatives			Derivatives not
		designated			designated as			designated			designated as
		as hedging			hedging			as hedging			hedging
		instruments			instruments			instruments			instruments
	Balance Sheet Asset Locations:
	Other assets, current	$	38		$	23		$	48		$	47

	Other assets	22			3			30			3

		60			26			78			50

	Total Asset Derivative Contracts				$	86					$	128

	Balance Sheet Liability Locations:
	Accrued liabilities	$	20		$	53		$	10		$	136

	Other long-term liabilities	13			2			1			2

		33			55			11			138

	Total Liability Derivative Contracts				$	88					$	149

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Text Block]

		Quarter Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions)	2013			2012			2013			2012
	Gain (loss) recorded in Accumulated other comprehensive loss	$	97		$	146		$	(64	)	$	83

	Gain (loss) reclassified from Accumulated other comprehensive loss into Product sales (effective portion)	$	1		$	7		$	(22	)	$	26

Schedule of Foreign Exchange Contracts Not Designated as Hedges, Gain (Loss) In Statement of Financial Performance [TextBlock]

		Quarter Ended September 30,						Nine Months Ended September 30,
	(Dollars in millions)	2013			2012			2013			2012
	Gain (loss) recognized in Other income, net	$	10		$	(19	)	$	33		$	(21	)

Fair Value, Measurement Inputs, Disclosure [Text Block]

	(Dollars in millions)	Total Carrying			Quoted price in			Significant other			Unobservable
		Value at			active markets			observable			inputs
		December 31,			(Level 1)			inputs			(Level 3)
		2012						(Level 2)
	Recurring fair value measurements:
	Available-for-sale securities	$	781		$	781		$	—		$	—

	Derivative assets	128			—			128			—

	Derivative liabilities	(149		)	—			(149		)	—

	Nonrecurring fair value measurements:
	Equity method investment	432			—			432			—

	Business dispositions	84			—			84			—



	(Dollars in millions)	Total Carrying			Quoted price in			Significant other			Unobservable
		Value at			active markets			observable			inputs
		30-Sep-13			(Level 1)			inputs			(Level 3)
								(Level 2)
	Recurring fair value measurements:
	Available-for-sale securities	$	882		$	882		$	—		$	—

	Derivative assets	86			—			86			—

	Derivative liabilities	(88		)	—			(88		)	—

	Nonrecurring fair value measurements:
	Business dispositions	40			—			40			—

Fair Value, by Balance Sheet Grouping [Text Block]

		30-Sep-13						December 31, 2012
	(Dollars in millions)	Carrying			Fair			Carrying			Fair
		Amount			Value			Amount			Value
	Long-term receivables	$	651		$	642		$	499		$	464

	Customer financing notes receivable	438			388			375			371

	Short-term borrowings	(303		)	(303		)	(503		)	(503		)
	Long-term debt (excluding capitalized leases)	(20,837		)	(20,937		)	(22,665		)	(25,606		)
	Long-term liabilities	(284		)	(257		)	(182		)	(167		)


	(Dollars in millions)	Total Fair			Quoted price in			Significant other			Unobservable
		Value at			active markets			observable inputs			inputs
		September 30,			(Level 1)			(Level 2)			(Level 3)
		2013
	Long-term receivables	$	642		$	—		$	642		$	—

	Customer financing notes receivable	388			—			388			—

	Short-term borrowings	(303		)	—			(100		)	(203		)

	Long-term debt (excluding capitalized leases)	(20,937		)	—			(20,830		)	(107		)

	Long-term liabilities	(257		)	—			(257		)	—

Credit_Quality_of_Longterm_Rec1

Credit Quality of Long-term Receivables (Tables)	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Financing Receivable Credit Quality Indicators [Table Text Block]

		30-Sep-13						December 31, 2012
	(Dollars in millions)	Long-term			Notes and			Long-term		Notes and
		trade accounts			leases			trade accounts		leases
		receivable			receivable			receivable		receivable
	A - (low risk, collateralized/uncollateralized)	$	607		$	30		$	569	$	26

	B - (moderate risk, collateralized/uncollateralized)	20			478			21		458

	C - (high risk, collateralized/uncollateralized)	3			122			3		100

	D - (in default, uncollateralized)	—			—			—		—

	Total	$	630		$	630		$	593	$	584



	(Dollars in millions)	September 30,			December 31,
		2013			2012
	Long-term trade accounts receivable	$	630		$	593

	Notes and leases receivable	630			584

	Total long-term receivables	$	1,260		$	1,177

Allowance for Credit Losses on Financing Receivables [Table Text Block]

	(Dollars in millions)	2013			2012
	Beginning balance of the reserve for credit losses and exposure as of January 1	$	60		$	70

	Provision	7			1

	Charge-offs	(13		)	—

	Recoveries	(1		)	(5		)
	Other	(3		)	(5		)
	Ending balance of the reserve for credit losses and exposure: individually evaluated for impairment as of September 30	$	50		$	61

	Ending balance of long-term receivables: individually evaluated for impairment as of September 30	$	1,260		$	1,036

Shareowners_Equity_and_Noncont1

Shareowners' Equity and Noncontrolling Interest (Tables)	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Stockholders' Equity Note Disclosure [Text Block]

			Nine Months Ended September 30,
			2013												2012
	(Dollars in millions)		Share-owners’				Non-controlling				Total				Share-owners’				Non-controlling				Total
			Equity				Interest				Equity				Equity				Interest				Equity
	Equity, beginning of period		$	25,914			$	1,155			$	27,069			$	21,880			$	940			$	22,820

	Comprehensive income for the period:
	Net income		4,258				286				4,544				3,073				267				3,340

	Total other comprehensive income (loss)		123				(9		)		114				827				4				831

	Total comprehensive income for the period		4,381				277				4,658				3,900				271				4,171

	Common Stock issued under employee plans		764								764				608								608

	Common Stock repurchased		(1,000		)						(1,000		)		—								—

	Treasury Stock reissued under employee plans		—								—				141								141

	Equity Units Issuance		—								—				(216		)						(216		)

	Dividends on Common Stock		(1,395		)						(1,395		)		(1,288		)						(1,288		)
	Dividends on ESOP Common Stock		(51		)						(51		)		(50		)						(50		)
	Dividends attributable to noncontrolling interest						(288		)		(288		)						(292		)		(292		)
	Purchase of subsidiary shares from noncontrolling interest		(36		)		(67		)		(103		)		(19		)		(4		)		(23		)
	Sale of subsidiary shares in noncontrolling interest		—				242				242				—				52				52

	Acquisition of noncontrolling interest						—				—								94				94

	Disposition of noncontrolling interest						(6		)		(6		)						(4		)		(4		)
	Redeemable noncontrolling interest in subsidiaries’ earnings						(3		)		(3		)						(22		)		(22		)
	Redeemable noncontrolling interest in total other comprehensive income						5				5								1				1

	Change in redemption value of put options		—								—				(1		)						(1		)

	Redeemable noncontrolling interest reclassification to noncontrolling interest						27				27								100				100

	Equity, end of period		$	28,577			$	1,342			$	29,919			$	24,955			$	1,136			$	26,091



			Quarter Ended September 30,
			2013												2012
	(Dollars in millions)		Share-owners’				Non-controlling Interest				Total				Share-owners’				Non-controlling Interest				Total
			Equity								Equity				Equity								Equity
	Equity, beginning of period		$	26,987			$	1,382			$	28,369			$	22,604			$	1,121			$	23,725

	Comprehensive income for the period:
	Net income		1,432				111				1,543				1,415				96				1,511

	Total other comprehensive income		675				17				692				1,012				23				1,035

	Total comprehensive income for the period		2,107				128				2,235				2,427				119				2,546

	Common Stock issued under employee plans		312								312				275								275

	Common Stock repurchased		(330		)						(330		)		—								—

	Treasury Stock reissued under employee plans		—								—				141								141

	Equity Units Issuance		—								—				—								—

Dividends on Common Stock		(465		)						(465		)		(463		)						(463		)

Dividends on ESOP Common Stock		(17		)						(17		)		(18		)						(18		)

Dividends attributable to noncontrolling interest						(161		)		(161		)						(162		)		(162		)

Purchase of subsidiary shares from noncontrolling interest		(17		)		(56		)		(73		)		(11		)		(1		)		(12		)
Sale of subsidiary shares in noncontrolling interest		—				—				—				—				17				17

Acquisition of noncontrolling interest						—				—								39				39

Disposition of noncontrolling interest						(1		)		(1		)						—				—

Redeemable noncontrolling interest in subsidiaries’ earnings						(1		)		(1		)						(11		)		(11		)

Redeemable noncontrolling interest in total other comprehensive income						(1		)		(1		)						(7		)		(7		)

Change in redemption value of put options		—								—				—								—

Redeemable noncontrolling interest reclassification to noncontrolling interest						52				52								21				21

Equity, end of period		$	28,577			$	1,342			$	29,919			$	24,955			$	1,136			$	26,091

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

	Details about Accumulated Other Comprehensive Loss		Quarter Ended September 30, 2013				Nine Months Ended September 30, 2013				Affected Line Item in the Condensed Consolidated Statement of Comprehensive Income
	Components Reclassified to Net Income
	(Dollars in millions)		Income (Expense)				Income (Expense)
	Foreign Currency Translation:
	Recognized due to business disposition		$	1			$	(31	)		Other income, net

	Defined Benefit Pension and Post-retirement Plans:
	Amortization of prior-service costs and transition obligation		$	10			$	34			Note (1)

	Recognized actuarial net loss		(236		)		(714		)		Note (1)
	Total before tax		(226		)		(680		)
	Tax benefit		71				235				Income tax expense

	Net of tax		$	(155	)		$	(445	)
	Unrealized Gains on Available-for-Sale Securities:
	Realized gain on sale of securities, before tax		$	27			$	81			Other income, net

	Tax expense		(10		)		(31		)		Income tax expense
	Net of tax		$	17			$	50

	Unrealized Hedging (Losses) Gains:
	Foreign exchange contracts		$	1			$	(22	)		Product sales

	Other contracts		—				2				Other income, net

	Total before tax		1				(20		)

	Tax (expense) benefit		(1		)		3				Income tax expense

	Net of tax		$	—			$	(17	)

	(1) These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 7 for additional details).


	(Dollars in millions)	Foreign				Defined				Unrealized Gains				Unrealized				Accumulated
		Currency				Benefit				(Losses) on				Hedging				Other
		Translation				Pension and				Available-for-Sale				(Losses)				Comprehensive
						Post-				Securities				Gains				(Loss) Income
						retirement
						Plans
	Balance at December 31, 2012	$	654			$	(6,250	)		$	145			$	3			$	(5,448	)

	Other comprehensive (loss) income before reclassifications	(439		)		27				140				(48		)		(320		)

	Amounts reclassified from accumulated other comprehensive loss (income)	31				445				(50		)		17				443

	Balance at September 30, 2013	$	246			$	(5,778	)		$	235			$	(28	)		$	(5,325	)

Temporary Equity [Text Block]

		Quarter Ended September 30,								Nine Months Ended September 30,
	(Dollars in millions)	2013				2012				2013				2012
	Redeemable noncontrolling interest, beginning of period	$	174			$	238			$	238			$	358

	Net income	1				11				3				22

	Foreign currency translation, net	1				7				(5		)		(1		)

	Dividends attributable to noncontrolling interest	—				(2		)		(3		)		(13		)

	Purchase of subsidiary shares from	—				—				—				(34		)
	noncontrolling interest
	Disposition of noncontrolling interest	—				—				(82		)		—

	Change in redemption value of put options	—				—				—				1

	Redeemable noncontrolling interest reclassification to noncontrolling interest	(52		)		(21		)		(27		)		(100		)
	Redeemable noncontrolling interest, end of period	$	124			$	233			$	124			$	233

Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Text Block]

		Quarter Ended September 30,								Nine Months Ended September 30,
	(Dollars in millions)	2013				2012				2013				2012
	Net income attributable to common shareowners	$	1,432			$	1,415			$	4,258			$	3,073

	Transfers to noncontrolling interests:
	Decrease in common stock for purchase of subsidiary shares	(17		)		(11		)		(36		)		(19		)
	Change from net income attributable to common shareowners and transfers to noncontrolling interests	$	1,415			$	1,404			$	4,222			$	3,054

Guarantees_Tables

Guarantees (Tables)	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Product Warranty Disclosure [Text Block]

	(Dollars in millions)	2013			2012
	Balance as of January 1	$	1,332		$	1,468

	Warranties and performance guarantees issued	232			235

	Settlements made	(223		)	(217		)
	Other	22			(165		)

	Balance as of September 30	$	1,363		$	1,321

Segment_Financial_Data_Tables

Segment Financial Data (Tables)	9 Months Ended
	Sep. 30, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]
Schedule of Segment Reporting Information, by Segment [Text Block]

		Net Sales						Operating Profits						Operating Profit Margins
	(Dollars in millions)	2013			2012			2013			2012			2013		2012
	Otis	$	3,188		$	3,054		$	681		$	651		21.4	%	21.3	%

	UTC Climate, Controls & Security	4,237			4,259			696			632			16.4	%	14.8	%

	Pratt & Whitney	3,386			3,574			439			409			13	%	11.4	%

	UTC Aerospace Systems	3,312			2,670			501			271			15.1	%	10.1	%

	Sikorsky	1,541			1,649			159			203			10.3	%	12.3	%

	Total segments	15,664			15,206			2,476			2,166			15.8	%	14.2	%

	Eliminations and other	(202		)	(164		)	7			(22		)

	General corporate expenses	—			—			(117		)	(103		)

	Consolidated	$	15,462		$	15,042		$	2,366		$	2,041		15.3	%	13.6	%



		Net Sales						Operating Profits						Operating Profit Margins
	(Dollars in millions)	2013			2012			2013			2012			2013		2012
	Otis	$	9,140		$	8,851		$	1,906		$	1,868		20.9	%	21.1	%

	UTC Climate, Controls & Security	12,617			12,943			1,968			1,965			15.6	%	15.2	%

	Pratt & Whitney	10,412			10,073			1,412			1,225			13.6	%	12.2	%

	UTC Aerospace Systems	9,896			5,160			1,501			680			15.2	%	13.2	%

	Sikorsky	4,356			4,615			405			552			9.3	%	12	%

	Total segments	46,421			41,642			7,192			6,290			15.5	%	15.1	%

	Eliminations and other	(554		)	(377		)	32			(54		)

	General corporate expenses	—			—			(345		)	(303		)

	Consolidated	$	45,867		$	41,265		$	6,879		$	5,933		15	%	14.4	%

Acquisitions_Dispositions_Good2

Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Business Acquisitions) (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended			9 Months Ended		12 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Goodrich Corporation [Member]	Goodrich Corporation [Member]	Goodrich Corporation [Member]	Goodrich Corporation [Member]	Goodrich Corporation [Member]	Goodrich Corporation [Member]	International Aero Engines AG [Member]	Group Ascensores Enor SA [Member]	Pratt and Whitney Power Systems [Member]
Notes to Condensed Consolidated Financial Statements [Abstract]
Business Acquisitions Pro Forma Net Sales		$15,512,000,000		$45,730,000,000
Business Acquisition [Line Items]
Business Acquisition Date Of Acquisition Agreement								26-Jul-12
Business Acquisition Cash Paid Per Share								$127.50
Business Acquisition Cost Of Acquired Entity Purchase Price					18,300,000,000			18,300,000,000			1,500,000,000
Noncash or Part Noncash Acquisition, Net Debt Assumed					1,900,000,000			1,900,000,000
Business Acquisition Revenue Reported By Acquired Entity For Last Annual Period										8,100,000,000		50,000,000
Business Acquisition Effective Date Of Acquisition											29-Jun-12	7-Feb-13
Business Acquisition Purchase Price Allocation Environmental Liabilities Assumed	325,000,000		325,000,000		325,000,000			325,000,000
Business Acquisition Preexisting Relationship Gain Loss Recognized									46,000,000
Proceeds From Issuance Of Commercial Paper								3,200,000,000
Short-term Debt, Loan Maximum Borrowing Capacity								2,000,000,000
Short-Term Debt Instrument, Agreement Date								24-Apr-12
Cash and Cash Equivalents Used in Business Acquisition					500,000,000			500,000,000
Business Acquisition, Purchase Price Allocation, Management Continuity Arrangement Liabilities Assumed					74,000,000			74,000,000
Business Acquisition, Cost of Management Continuity Arrangements Amendment						9,000,000			12,000,000
Business Acquisition, Unremitted Foreign Earnings Income Tax Liability										853,000,000
Business Acquisition Purchase Price Allocation Deferred Income Tax Liability					215,000,000			215,000,000
Payments to Acquire Businesses, Net of Cash Acquired												240,000,000
Debt Instrument, Utilization of Net Proceeds					9,600,000,000			9,600,000,000
Debt Instrument, Total Face Amount Issued					9,800,000,000			9,800,000,000
Proceeds From Issuance Equity Units					1,100,000,000			1,100,000,000
Equity Issuance, Date								18-Jun-12
Acquisition Cost Of Acquired Entities and Interest in Affiliates			120,000,000
Disposal Date													17-May-13
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	10,000,000	-26,000,000	-30,000,000	-62,000,000									193,000,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax													132,000,000
Proceeds from Divestiture of Businesses													432,000,000
Business Combination, Contingent Consideration, Asset													200,000,000
Contractual Obligation, Consumed in Current Year					60,000,000			210,000,000
Contractual Obligation Due in Remainder of Fiscal Year					70,000,000			70,000,000
Contractual Obligation, Due in Next Twelve Months					274,000,000			274,000,000
Contractual Obligation, Due in Second Year					213,000,000			213,000,000
Contractual Obligation, Due in Third Year					242,000,000			242,000,000
Contractual Obligation, Due in Fourth Year					233,000,000			233,000,000
Contractual Obligation, Due after Fifth Year					894,000,000			894,000,000
Proceeds from Sales of Business, Affiliate and Productive Assets							600,000,000
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax		$1,315,000,000		$4,145,000,000
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic		$1.47		$4.63
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted		$1.45		$4.57

Acquisitions_Dispositions_Good3

Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Consideration Transferred Information) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Goodwill	$28,100	$27,801
Goodrich Corporation [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	538
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	1,205
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	1,673
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Current	515
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	647
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	2,209
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets, Customer Relationships	8,550
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets, Trademarks	1,550
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	1,501
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Short-Term Borrowings	-84
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	-587
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued Liabilities	-1,919
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt	-2,961
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Projected Benefit Obligation	-1,743
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Customer Contractual Obligations	-2,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	-4,013
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value	-41
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net	4,840
Goodwill	11,580
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Net	$16,420

Acquisitions_Dispositions_Good4

Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Pro-Forma Information) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2012		Sep. 30, 2012
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Acquisitions Pro Forma Net Sales	$15,512		$45,730
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax	1,315		4,145
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic	$1.47		$4.63
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted	$1.45		$4.57
Fair Value Adjustment to Inventory [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net Income (Loss) Attributable to Noncontrolling Interest	-49	[1]	-49	[1]
Business Acquisition, Pro Forma Information, Description	1 Removed the expense for the amortization of inventory fair value adjustments recognized in the quarter ended September 30, 2012, as the corresponding inventory would have been completely sold during the first two quarters of 2011.	[1]
Amortization of Acquired Intanglible Assets [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net Income (Loss) Attributable to Noncontrolling Interest	15	[2]	107	[2]
Business Acquisition, Pro Forma Information, Description	2 Added the additional amortization of the acquired Goodrich intangible assets recognized at fair value in purchase accounting and eliminated the historical Goodrich intangible asset amortization expense.	[2]
Utilization of Contractual Customer Obligation [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net Income (Loss) Attributable to Noncontrolling Interest	-10	[3]	-103	[3]
Business Acquisition, Pro Forma Information, Description	3 Added the additional utilization of the Goodrich contractual customer obligation recognized in purchase accounting.	[3]
Interest Expense Incurred [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net Income (Loss) Attributable to Noncontrolling Interest	($3)	[4]	$63	[4]
Business Acquisition, Pro Forma Information, Description	4 Added the additional interest expense for the indebtedness we incurred to finance the acquisition of Goodrich and reduced interest expense for the debt fair value adjustment which would have been amortized.	[4]

[1]	1 Removed the expense for the amortization of inventory fair value adjustments recognized in the quarter ended September 30, 2012, as the corresponding inventory would have been completely sold during the first two quarters of 2011.
[2]	2 Added the additional amortization of the acquired Goodrich intangible assets recognized at fair value in purchase accounting and eliminated the historical Goodrich intangible asset amortization expense.
[3]	3 Added the additional utilization of the Goodrich contractual customer obligation recognized in purchase accounting.
[4]	4 Added the additional interest expense for the indebtedness we incurred to finance the acquisition of Goodrich and reduced interest expense for the debt fair value adjustment which would have been amortized.

Acquisitions_Dispositions_Good5

Acquisitions, Dispositions, Goodwill and Other Intangible Assets (IAE Collaboration) (Details)	Sep. 30, 2013
International Aero Engines AG [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage	49.50%
IAE Collaboration [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment Ownership Percentage	61.00%

Acquisitions_Dispositions_Good6

Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Variable Interest Entity) (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified	Sep. 30, 2013
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Current Assets	$1,636
Variable Interest Entity, Consolidated, Carrying Amount, Current Liabilities	1,821
Variable Interest Entity, Consolidated, Carrying Amount, Noncurrent Assets	1,023
Variable Interest Entity, Consolidated, Carrying Amount, Assets	2,659
Variable Interest Entity, Consolidated, Carrying Amount, Noncurrent Liabilities	1,067
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	$2,888

Acquisition_Dispositions_Goodw

Acquisition, Dispositions, Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Goodwill [Line Items]
Goodwill - Beginning Balance	$27,801
Goodwill resulting from business combinations	442
Goodwill translation and other	-143
Goodwill - Ending Balance	28,100
Otis [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	1,583
Goodwill resulting from business combinations	139
Goodwill translation and other	-7
Goodwill - Ending Balance	1,715
UTC Climate Controls and Security [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	9,868
Goodwill resulting from business combinations	2
Goodwill translation and other	-149
Goodwill - Ending Balance	9,721
UTC Aerospace Systems [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	14,754
Goodwill resulting from business combinations	301
Goodwill translation and other	-20
Goodwill - Ending Balance	15,035
Pratt and Whitney [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	1,238
Goodwill resulting from business combinations	0
Goodwill translation and other	35
Goodwill - Ending Balance	1,273
Sikorsky [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	353
Goodwill resulting from business combinations	0
Goodwill translation and other	-1
Goodwill - Ending Balance	352
Total Segments [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	27,796
Goodwill resulting from business combinations	442
Goodwill translation and other	-142
Goodwill - Ending Balance	28,096
Eliminations and other [Member]
Goodwill [Line Items]
Goodwill - Beginning Balance	5
Goodwill resulting from business combinations	0
Goodwill translation and other	-1
Goodwill - Ending Balance	$4

Acquisitions_Dispositions_Good7

Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Intangible Assets) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	$2,274		$2,274		$2,310
Intangible Assets Gross Excluding Goodwill	19,009		19,009		18,276
Amortization of Intangible Assets	180	166	531	360
Finite-Lived Intangible Assets [Line Items]
Gross Amount	16,735		16,735		15,966
Accumulated Amortization	-3,514		-3,514		-3,087
Service Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	2,235		2,235		2,127
Accumulated Amortization	-1,272		-1,272		-1,202
Patents and trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	382		382		412
Accumulated Amortization	-178		-178		-167
Collaboration [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	2,093		2,093		1,526
Accumulated Amortization	0		0		0
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	12,025		12,025		11,901
Accumulated Amortization	($2,064)		($2,064)		($1,718)

Acquisitions_Dispositions_Good8

Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Amortization Expense) (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified	Sep. 30, 2013
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$171
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	681
Finite-Lived Intangible Assets, Amortization Expense, Year Two	645
Finite-Lived Intangible Assets, Amortization Expense, Year Three	626
Finite-Lived Intangible Assets, Amortization Expense, Year Four	619
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$648

Discontinued_Operations_Narrat

Discontinued Operations (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Discontinued Operation Income Loss From Discontinued OperationImpairment Charge During Phase Out Period Before Income Tax				$1,135
(Gain) loss on disposal	10	-26	-30	-62
Pratt and Whitney Rocketdyne [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Disposal Date			14-Jun-13
(Gain) loss on disposal			-7
Disposal Group Including Discontinued Operation Pre tax Goodwill Impairment			360
Disposal Group Including Discontinued Operation After tax Goodwill Impairment			220
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax			-3
UTC Power [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Disposal Date			12-Feb-13
Discontinued Operation Cash Payment			$48

Discontinued_Operations_Income

Discontinued Operations (Income Statement Information) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract]
Net Sales	$0	$522	$309	$1,607
Income (loss) from operations	0	91	63	-1,017
Income tax expense	0	-30	-32	-38
Income from operations, net of income taxes	0	61	31	-1,055
(Gain) loss on disposal	10	-26	-30	-62
Income tax benefit (expense)	7	135	20	294
Income from continuing operations	$17	$170	$21	($823)

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	6,100,000	0	4,800,000
Net income from continuing operations	$1,415	$1,247	$4,237	$3,902
Net income (loss) from discontinued operations	17	168	21	-829
Net income attributable to common shareowners	$1,432	$1,415	$4,258	$3,073
Basic weighted average number of shares outstanding	900,800,000	896,300,000	900,900,000	893,600,000
Stock Awards	14,700,000	10,900,000	13,200,000	11,700,000
Diluted weighted average number of shares outstanding	915,500,000	907,200,000	914,100,000	905,300,000
Net income from continuing operations	$1.57	$1.39	$4.70	$4.37
Net income (loss) from discontinued operations	$0.02	$0.19	$0.02	($0.93)
Net income attributable to common shareowners	$1.59	$1.58	$4.73	$3.44
Net income from continuing operations	$1.55	$1.37	$4.64	$4.31
Net income (loss) from discontinued operations	$0.02	$0.19	$0.02	($0.92)
Net income attributable to common shareowners	$1.57	$1.56	$4.66	$3.39

Inventories_and_Contracts_in_P2

Inventories and Contracts in Progress (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Notes to Condensed Consolidated Financial Statements [Abstract]
Raw materials	$1,967	$1,861
Work-in-process	4,864	4,151
Finished goods	3,556	3,205
Contracts in progress	8,038	7,354
Inventory before payments and billings	18,425	16,571
Progress payments, secured by lien, on U.S. Government contracts	-379	-274
Billings on contracts in progress	-7,281	-6,760
Inventories and contracts in progress, net	10,765	9,537
Capitalized research and development costs included in inventory	$866	$823

Borrowings_and_Lines_of_Credit2

Borrowings and Lines of Credit (Short-Term Borrowings) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Notes to Condensed Consolidated Financial Statements [Abstract]
Commercial paper	$100	$320
Other borrowings	203	183
Short-term borrowings	$303	$503

Borrowing_and_Lines_of_Credit_

Borrowing and Lines of Credit (Narrative) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Line of Credit Facility [Line Items]
Aggregate Line of Credit Facility Maximum Borrowing Capacity	$4,000
Maximum Commercial Paper Borrowing Authority	4,000
Revolving Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	2,000
Line of Credit Facility, Amount Outstanding	0
Line of Credit Facility, Expiration Date	30-Nov-16
Multicurrency Revolving Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	2,000
Line of Credit Facility, Amount Outstanding	$0

Borrowings_and_Lines_of_Credit3

Borrowings and Lines of Credit (Long-Term Debt) (Details) (USD $)	9 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Notes to Condensed Consolidated Financial Statements [Abstract]
Other Long-term Debt	438	[1]	$403	[1]
Principal Long-Term Debt	20,671		22,365
Other Long-Term Debt Fair Market Value Adjustments	214	[1]	353	[1]
Total long-term debt	20,885		22,718
Long-term Debt and Capital Lease Obligations, Current	1,100		1,121
Debt Instrument [Line Items]
Other Loans Payable	69		100
Debt Instrument London Interbank Offered Rate	0.30%
June 2013 Redemption Call [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Announcement Date	24-May-13
Gains (Losses) on Extinguishment of Debt	-6
Extinguishment of Debt, Payment Date	24-Jun-13
May 2013 Tender Offer [Member]
Debt Instrument [Line Items]
Gains (Losses) on Extinguishment of Debt	-18
Extinguishment of Debt, Payment Date	7-May-13
December 2012 Tender Offer [Member]
Debt Instrument [Line Items]
Gains (Losses) on Extinguishment of Debt			-26
Extinguishment of Debt, Payment Date	8-Jan-13
August 2013 Redemption Call [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Announcement Date	24-Jul-13
Extinguishment of Debt, Payment Date	23-Aug-13
September 2013 Redemption Call [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Announcement Date	28-Aug-13
Extinguishment of Debt, Payment Date	27-Sep-13
August 2013 September 2013 Redemption Call [Member]
Debt Instrument [Line Items]
Gains (Losses) on Extinguishment of Debt	1
LIBOR Plus 0.270% Floating Rate Notes Due 2013 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,000	[2]	1,000	[2]
Debt Instrument, Call Feature	B' The three-month LIBOR rate as of September 30, 2013 was approximately 0.3%.
Debt Instrument Maturity Date Description	2013
Debt Instrument, Interest Rate Terms	LIBOR plus 0.270%
LIBOR Plus 0.500% Floating Rate Notes Due 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	500	[2]	500	[2]
Debt Instrument, Call Feature	B' The three-month LIBOR rate as of September 30, 2013 was approximately 0.3%.
Debt Instrument Maturity Date Description	2015
Debt Instrument, Interest Rate Terms	LIBOR plus 0.500%
Notes 1.200% Due 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	0	[3]	1,000	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2015
Debt Instrument, Interest Rate, Stated Percentage	1.20%
Notes 1.200% Due 2015 [Member] \| June 2013 Redemption Call [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	327
Notes 1.200% Due 2015 [Member] \| May 2013 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	674
Notes 4.875% Due 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,200	[3]	1,200	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2015
Debt Instrument, Interest Rate, Stated Percentage	4.88%
Notes 6.290% Due 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	188	[1]	291	[1]
Debt Instrument, Call Feature	b! Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2016
Debt Instrument, Interest Rate, Stated Percentage	6.29%
Notes 6.290% Due 2016 [Member] \| May 2013 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	103
Notes 5.375% Due 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,000	[3]	1,000	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2017
Debt Instrument, Interest Rate, Stated Percentage	5.38%
Notes 1.800% Due 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,500	[3]	1,500	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2017
Debt Instrument, Interest Rate, Stated Percentage	1.80%
Notes 6.800% Due 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	99	[1]	99	[1]
Debt Instrument, Call Feature	b! Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2018
Debt Instrument, Interest Rate, Stated Percentage	6.80%
Notes 6.125% Due 2019*** [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	0	[1]	300	[1]
Debt Instrument, Call Feature	b! Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2019
Debt Instrument, Interest Rate, Stated Percentage	6.13%
Notes 6.125% Due 2019*** [Member] \| May 2013 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	98
Notes 6.125% Due 2019*** [Member] \| August 2013 Redemption Call [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	202
Notes 6.125% Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,250	[3]	1,250	[3]
Debt Instrument, Call Feature	* We may redeem some or all of these series of notes at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount outstanding of the applicable series of notes to be redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the applicable series of notes to be redeemed. The discounts applied on such redemptions are based on a semiannual calculation at an adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2019
Debt Instrument, Interest Rate, Stated Percentage	6.13%
Notes 8.875% Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	272		272
Debt Instrument Maturity Date Description	2019
Debt Instrument, Interest Rate, Stated Percentage	8.88%
Notes 4.500% Due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,250	[3]	1,250	[3]
Debt Instrument, Call Feature	* We may redeem some or all of these series of notes at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount outstanding of the applicable series of notes to be redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the applicable series of notes to be redeemed. The discounts applied on such redemptions are based on a semiannual calculation at an adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2020
Debt Instrument, Interest Rate, Stated Percentage	4.50%
Notes 4.875% Due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	171	[1]	171	[1]
Debt Instrument, Call Feature	b! Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2020
Debt Instrument, Interest Rate, Stated Percentage	4.88%
Notes 3.600% Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	0	[1]	295	[1]
Debt Instrument, Call Feature	b! Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2021
Debt Instrument, Interest Rate, Stated Percentage	3.60%
Notes 3.600% Due 2021 [Member] \| September 2013 Redemption Call [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	294
Notes 8.750% Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	250		250
Debt Instrument Maturity Date Description	2021
Debt Instrument, Interest Rate, Stated Percentage	8.75%
Notes 3.100% Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	2,300	[3]	2,300	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2022
Debt Instrument, Interest Rate, Stated Percentage	3.10%
Junior Subordinated Notes 1.550% Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,100	[4]	1,100	[4]
Debt Instrument, Call Feature	b The junior subordinated notes are redeemable at our option, in whole or in part, on a date not earlier than August 1, 2017. The redemption price will be the principal amount, plus accrued and unpaid interest, if any, up to but excluding the redemption date. We may extend or eliminate the optional redemption date as part of a remarketing of the junior subordinated notes which could occur between April 29, 2015 and July 15, 2015 or between July 23, 2015 and July 29, 2015.
Debt Instrument Maturity Date Description	2022
Debt Instrument, Interest Rate, Stated Percentage	1.55%
Notes 7.100% Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	141	[1]	141	[1]
Debt Instrument, Call Feature	b! Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2027
Debt Instrument, Interest Rate, Stated Percentage	7.10%
Notes 6.700% Due 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	400		400
Debt Instrument Maturity Date Description	2028
Debt Instrument, Interest Rate, Stated Percentage	6.70%
Notes 7.500% Due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	550	[3]	550	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2029
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Notes 5.400% Due 2035 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	600	[3]	600	[3]
Debt Instrument, Call Feature	* We may redeem some or all of these series of notes at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount outstanding of the applicable series of notes to be redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the applicable series of notes to be redeemed. The discounts applied on such redemptions are based on a semiannual calculation at an adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2035
Debt Instrument, Interest Rate, Stated Percentage	5.40%
Notes 6.050% Due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	600	[3]	600	[3]
Debt Instrument, Call Feature	* We may redeem some or all of these series of notes at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount outstanding of the applicable series of notes to be redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the applicable series of notes to be redeemed. The discounts applied on such redemptions are based on a semiannual calculation at an adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2036
Debt Instrument, Interest Rate, Stated Percentage	6.05%
Notes 6.800% Due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	134	[1]	134	[1]
Debt Instrument, Call Feature	b! Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2036
Debt Instrument, Interest Rate, Stated Percentage	6.80%
Notes 7.000% Due 2038 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	159	[1]	159	[1]
Debt Instrument, Call Feature	b! Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2038
Debt Instrument, Interest Rate, Stated Percentage	7.00%
Notes 6.125% Due 2038 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,000	[3]	1,000	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2038
Debt Instrument, Interest Rate, Stated Percentage	6.13%
Notes 5.700% Due 2040 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,000	[3]	1,000	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2040
Debt Instrument, Interest Rate, Stated Percentage	5.70%
Notes 4.500% Due 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	3,500	[3]	3,500
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2042
Debt Instrument, Interest Rate, Stated Percentage	4.50%
Long-term Debt [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	2
Long-term Debt [Member] \| May 2013 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	874
Long-term Debt [Member] \| December 2012 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	637		635
Debt Fair Value Adjustment [Member] \| May 2013 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	36
Debt Fair Value Adjustment [Member] \| December 2012 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	126
December 2012 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Announcement Date	6-Dec-12
Extinguishment of Debt, Expiration Date	7-Jan-13

[1]	Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
[2]	The three-month LIBOR rate as of SeptemberB 30, 2013 was approximately 0.3%
[3]	We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
[4]	The junior subordinated notes are redeemable at our option, in whole or in part, on a date not earlier than August 1, 2017. The redemption price will be the principal amount, plus accrued and unpaid interest, if any, up to but excluding the redemption date. We may extend or eliminate the optional redemption date as part of a remarketing of the junior subordinated notes which could occur between April 29, 2015 and July 15, 2015 or between July 23, 2015 and July 29, 2015.

Income_Taxes_Details

Income Taxes (Details)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
	USD ($)	EUR (€)
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	$45
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound	490
Tax benefits claimed related to 1998 German reorganization	275	204
Tax Benefits Claimed Related to the French Revenue Authority.	$320	€ 237

Employee_Benefit_Plans_Details

Employee Benefit Plans (Details) (USD $)	3 Months Ended		9 Months Ended
Employee Benefit Plans (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Contributions to Defined Contribution Plans	$75,000,000	$65,000,000	$258,000,000	$183,000,000
Discontinued Operations Defined Benefit Plan Recognized Net Gain Loss Due To Settlements And Curtailments	0		-24,000,000	24,000,000
Business Acquisition Pension And Post Retirement Obligations Assumed	1,500,000,000		1,500,000,000
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to Defined Benefit Plans	21,000,000	209,000,000	72,000,000	233,000,000
Defined Benefit Plan, Service Cost	142,000,000	131,000,000	428,000,000	361,000,000
Defined Benefit Plan, Interest Cost	343,000,000	344,000,000	1,029,000,000	970,000,000
Defined Benefit Plan, Expected Return on Plan Assets	-526,000,000	-503,000,000	-1,579,000,000	-1,415,000,000
Defined Benefit Plan, Amortization of Transition Obligations, Assets and Prior Service Cost Credit	-8,000,000	-7,000,000	-26,000,000	-13,000,000
Defined Benefit Plan, Actuarial Net (Gains) Losses	237,000,000	180,000,000	717,000,000	541,000,000
Defined Benefit Plan, Recognized Net (Gain) Loss Due to Settlements and Curtailments	0	15,000,000	-17,000,000	50,000,000
Defined Benefit Plan, Net Periodic Benefit Cost	188,000,000	160,000,000	552,000,000	494,000,000
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,000,000	1,000,000	3,000,000	3,000,000
Defined Benefit Plan, Interest Cost	9,000,000	10,000,000	28,000,000	26,000,000
Defined Benefit Plan, Expected Return on Plan Assets	0	0	0	0
Defined Benefit Plan, Amortization of Transition Obligations, Assets and Prior Service Cost Credit	-2,000,000	-2,000,000	-8,000,000	-2,000,000
Defined Benefit Plan, Actuarial Net (Gains) Losses	-1,000,000	-1,000,000	-3,000,000	-5,000,000
Defined Benefit Plan, Recognized Net (Gain) Loss Due to Settlements and Curtailments	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	7,000,000	8,000,000	20,000,000	22,000,000
United States Pension Plans Of US Entity Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to Defined Benefit Plans			$0	$201,000,000

Restructuring_and_Other_Costs_1

Restructuring and Other Costs (Details) (USD $)	3 Months Ended			9 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				$343
Restructuring costs recorded with continuing operations				345
Restructuring costs recorded within discontinued operations				-2
Restructuring Reserve, Two Years Prior Actions	5			5
Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve Beginning Balance	160
Restructuring Charges	96			298
Restructuring Reserve Settled	-111
Restructuring Reserve Ending Balance	145	160		145
Restructuring and Related Cost, Incurred Cost	-96	-182	-20
Anticipated Net Workforce Reduction Of Hourly And Salary Employees				approximately 3,600 hourly and salaried employees
Anticipated Net Square Feet Of Facilities To Be Exited				approximately 600 thousand net square feet
Completed Net Workforce Reduction Of Hourly And Salary Employees				approximately 2,400 employees
Completed Net Square Feet Of Facilities Exited				approximately 5,000 net square feet
Restructuring and Related Cost, Expected Cost				341
Restructuring And Related Cost Expected Remaining	43			43
Current Year Actions [Member] \| Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve Beginning Balance	153
Restructuring Charges	89
Restructuring Reserve Settled	-108
Restructuring Reserve Ending Balance	134	153		134
Restructuring and Related Cost, Incurred Cost	-89	-163	-19
Restructuring and Related Cost, Expected Cost				287
Restructuring And Related Cost Expected Remaining	16			16
Current Year Actions [Member] \| Asset Write Downs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve Beginning Balance	0
Restructuring Charges	1
Restructuring Reserve Settled	-1
Restructuring Reserve Ending Balance	0	0		0
Restructuring and Related Cost, Incurred Cost	-1	-12	0
Restructuring and Related Cost, Expected Cost				13
Restructuring And Related Cost Expected Remaining	0			0
Current Year Actions [Member] \| Facility Exit [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve Beginning Balance	7
Restructuring Charges	6
Restructuring Reserve Settled	-2
Restructuring Reserve Ending Balance	11	7		11
Restructuring and Related Cost, Incurred Cost	-6	-7	-1
Restructuring and Related Cost, Expected Cost				41
Restructuring And Related Cost Expected Remaining	27			27
Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve Beginning Balance	189
Restructuring Charges	6			44
Restructuring Reserve Settled	-45
Restructuring Reserve Ending Balance	150	189		150
Restructuring and Related Cost, Incurred Cost	-6	-9	-29		-576
Anticipated Net Workforce Reduction Of Hourly And Salary Employees				7,300 employees
Anticipated Net Square Feet Of Facilities To Be Exited				3.6 millionB net square feet
Completed Net Workforce Reduction Of Hourly And Salary Employees				approximately 6,100 employees
Completed Net Square Feet Of Facilities Exited				1.6 million net square feet
Restructuring and Related Cost, Expected Cost				660
Restructuring And Related Cost Expected Remaining	40			40
Prior Year Actions [Member] \| Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve Beginning Balance	142
Restructuring Charges	-3
Restructuring Reserve Settled	-32
Restructuring Reserve Ending Balance	107	142		107
Restructuring and Related Cost, Incurred Cost	3	1	-18		-452
Restructuring and Related Cost, Expected Cost				477
Restructuring And Related Cost Expected Remaining	11			11
Prior Year Actions [Member] \| Asset Write Downs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve Beginning Balance	0
Restructuring Charges	0
Restructuring Reserve Settled	0
Restructuring Reserve Ending Balance	0	0		0
Restructuring and Related Cost, Incurred Cost	0	0	-1		-14
Restructuring and Related Cost, Expected Cost				15
Restructuring And Related Cost Expected Remaining	0			0
Prior Year Actions [Member] \| Facility Exit [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve Beginning Balance	47
Restructuring Charges	9
Restructuring Reserve Settled	-13
Restructuring Reserve Ending Balance	43	47		43
Restructuring and Related Cost, Incurred Cost	-9	-10	-10		-110
Restructuring and Related Cost, Expected Cost				168
Restructuring And Related Cost Expected Remaining	29			29
Otis [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				68
Otis [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	-12	-35	-6
Restructuring and Related Cost, Expected Cost				61
Restructuring And Related Cost Expected Remaining	8			8
Otis [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	-1	-2	-1		-146
Restructuring and Related Cost, Expected Cost				157
Restructuring And Related Cost Expected Remaining	7			7
UTC Climate Controls and Security [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				66
UTC Climate Controls and Security [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	-34	-18	-8
Restructuring and Related Cost, Expected Cost				81
Restructuring And Related Cost Expected Remaining	21			21
UTC Climate Controls and Security [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	1	-1	-14		-123
Restructuring and Related Cost, Expected Cost				149
Restructuring And Related Cost Expected Remaining	12			12
Pratt and Whitney [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				122
Pratt and Whitney [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	-22	-93	-6
Restructuring and Related Cost, Expected Cost				127
Restructuring And Related Cost Expected Remaining	6			6
Pratt and Whitney [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0	0	-1		-94
Restructuring and Related Cost, Expected Cost				98
Restructuring And Related Cost Expected Remaining	3			3
UTC Aerospace Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				65
UTC Aerospace Systems [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	-19	-28	0
Restructuring and Related Cost, Expected Cost				55
Restructuring And Related Cost Expected Remaining	8			8
UTC Aerospace Systems [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	-5	-5	-8		-121
Restructuring and Related Cost, Expected Cost				154
Restructuring And Related Cost Expected Remaining	15			15
Sikorsky [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				25
Sikorsky [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	-10	-8	0
Restructuring and Related Cost, Expected Cost				18
Restructuring And Related Cost Expected Remaining	0			0
Sikorsky [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	-1	-1	-5		-47
Restructuring and Related Cost, Expected Cost				57
Restructuring And Related Cost Expected Remaining	3			3
Eliminations and other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				-1
Eliminations and other [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	1	0	0
Restructuring and Related Cost, Expected Cost				-1
Restructuring And Related Cost Expected Remaining	0			0
Eliminations and other [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0	0	0		-19
Restructuring and Related Cost, Expected Cost				19
Restructuring And Related Cost Expected Remaining	0			0
Discontinued Operations [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0	0	0		-26
Restructuring and Related Cost, Expected Cost				26
Restructuring And Related Cost Expected Remaining	0			0
Cost Of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				145
Cost Of Sales [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				100
Cost Of Sales [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				40
Selling General and Administrative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				199
Selling General and Administrative [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				198
Selling General and Administrative [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				3
Discontinued Operations [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				-2
Other Income [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				1
Other Income [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				$1

Financial_Instruments_Narrativ

Financial Instruments (Narrative) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Billions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Notes to Condensed Consolidated Financial Statements [Abstract]
Four Quarter Rolling Average of Notional Amount of Foreign Exchange Contracts Hedging Foreign Currency Transactions	$12.60	$11.80

Financial_Instruments_Fair_Val

Financial Instruments (Fair Value of Derivative Instruments) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Notes to Condensed Consolidated Financial Statements [Abstract]
Derivative Asset, Fair Value	$86	$128
Derivative Liability, Fair Value	88	149
Other Assets, Current [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Asset at Fair Value	38	48
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	23	47
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Asset at Fair Value	22	30
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	3	3
Assets, Total [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Asset at Fair Value	60	78
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	26	50
Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Liability at Fair Value	20	10
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	53	136
Other Long-Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Liability at Fair Value	13	1
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	2	2
Liabilities, Total [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Liability at Fair Value	33	11
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	$55	$138

Financial_Instruments_Impact_F

Financial Instruments (Impact From Foreign Exchange Derivative Instruments) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Notes to Condensed Consolidated Financial Statements [Abstract]
(Loss) gain recorded in Accumulated other comprehensive loss	$97	$146	($64)	$83
(Loss) gain reclassified from Accumulated other comprehensive loss into Product Sales (effective portion)	1	7	-22	26
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	$15		$15

Financial_Instruments_Effect_o

Financial Instruments (Effect of Foreign Exchange Contracts Not Designated) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Notes to Condensed Consolidated Financial Statements [Abstract]
(Loss) gain recognized in Other income, net	$10	($19)	$33	($21)

Financial_Instruments_Fair_Val1

Financial Instruments (Fair Value Hierarchy Classification) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
			Fair Value, Measurements, Recurring [Member]	Fair Value, Measurements, Recurring [Member]	Fair Value, Measurements, Recurring [Member]	Fair Value, Measurements, Recurring [Member]	Fair Value, Measurements, Recurring [Member]	Fair Value, Measurements, Recurring [Member]	Fair Value, Measurements, Recurring [Member]	Fair Value, Measurements, Recurring [Member]	Fair Value, Measurements, Nonrecurring [Member]	Fair Value, Measurements, Nonrecurring [Member]	Fair Value, Measurements, Nonrecurring [Member]	Fair Value, Measurements, Nonrecurring [Member]	Fair Value, Measurements, Nonrecurring [Member]	Fair Value, Measurements, Nonrecurring [Member]	Fair Value, Measurements, Nonrecurring [Member]	Fair Value, Measurements, Nonrecurring [Member]	Estimate of Fair Value, Fair Value Disclosure [Member]	Estimate of Fair Value, Fair Value Disclosure [Member]	Estimate of Fair Value, Fair Value Disclosure [Member]	Estimate of Fair Value, Fair Value Disclosure [Member]	Estimate of Fair Value, Fair Value Disclosure [Member]	Portion at Other than Fair Value Measurement [Member]	Portion at Other than Fair Value Measurement [Member]
					Quoted price in active markets (Level 1) [Member]	Quoted price in active markets (Level 1) [Member]	Significant other observable inputs (Level 2) [Member]	Significant other observable inputs (Level 2) [Member]	Unobservable inputs (Level 3) [Member]	Unobservable inputs (Level 3) [Member]			Quoted price in active markets (Level 1) [Member]	Quoted price in active markets (Level 1) [Member]	Significant other observable inputs (Level 2) [Member]	Significant other observable inputs (Level 2) [Member]	Unobservable inputs (Level 3) [Member]	Unobservable inputs (Level 3) [Member]			Quoted price in active markets (Level 1) [Member]	Significant other observable inputs (Level 2) [Member]	Unobservable inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure			$882	$781	$882	$781	$0	$0	$0	$0
Derivative Assets			86	128	0	0	86	128	0	0
Derivative Financial Instruments, Liabilities, Fair Value Disclosure			-88	-149	0	0	-88	-149	0	0
Equity Method Investments, Fair Value Disclosure												432		0		432		0
Business Dispositions, Fair Value Disclosure											40	84	0	0	40	84	0	0
Net Gains on Non-recurring Fair Value Measurement	38	220
Net Gains of Sale of Controlling Interest		357
Non Cash Net Gain		272
Long-term receivables Fair Value Disclosure																			642	464	0	642	0	651	499
Customer Financing Notes Receivable Fair Value Disclosure																			388	371	0	388	0	438	375
Short Term borrowings																			-303	-503	0	-100	-203	-303	-503
Long-term debt (excluding capitalized leases) Fair Value Disclosure																			-20,937	-25,606	0	-20,830	-107	-20,837	-22,665
Other long-term liabilities, Fair Value Disclosure																			-257	-167	0	-257	0	-284	-182
Equity Method Investment Other Than Temporary Impairment	-25	103
Gain (Loss) on Disposition of Business	193
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		32
Net Gains on Previously Held Interests		$34

Financial_Instruments_Commerci

Financial Instruments (Commercial Aerospace Financing Commitments) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Billions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Commercial Aerospace [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset	$11.70	$10.90
International Aero Engines AG [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset	$6.40	$5.80

Credit_Quality_of_Longterm_Rec2

Credit Quality of Long-term Receivables (Reserve and Additional Information) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Credit Quality, Additional Information	We determine credit ratings for each customer in the portfolio based upon public information and information obtained directly from our customers. We conduct a review of customer credit ratings, published historical credit default rates for different rating categories, and multiple third party aircraft value publications as a basis to validate the reasonableness of the allowance for losses on these balances quarterly or when events and circumstances warrant. The credit ratings listed below range from bAb which indicates an extremely strong capacity to meet financial obligations and the receivable is either collateralized or uncollateralized, to bDb which indicates that payment is in default and the receivable is uncollateralized.
Financing Receivable Credit Quality Date Ratings Updated Range	quarterly or when events and circumstances warrant
Aerospace Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses, Risk Characteristics	Economic conditions and air travel influence the operating environment for most airlines, and the financial performance of our aerospace businesses is directly tied to the economic conditions of the commercial aerospace and defense industries. Additionally, the value of the collateral is also closely tied to commercial airline performance and may be subject to exposure of reduced valuation as a result of market declines.
Financing Receivable, Allowance for Credit Losses, Policy for Uncollectible Amounts	Uncollectible long-term receivables are written-off when collection of the indebtedness has been pursued for a reasonable period of time without collection; the customer is no longer in operation; or judgment has been levied, but the underlying assets are not adequate to satisfy the indebtedness.
Financing Receivable, Reserve for Credit Losses and Exposure, Beginning Balance	$60	$61	$70
Financing Receivable Reserve For Credit Losses And Exposure Provisions	7	1
Financing Receivable Reserve For Credit Losses And Exposure Write Offs	-13	0
Financing Receivable Reserve For Credit Losses And Exposure Recoveries	-1	-5
Financing Receivable Reserve For Credit Losses And Exposure Other	-3	-5
Financing Receivable, Reserve for Credit Losses and Exposure, Ending Balance	50	61	70
Financing Receivable Reserve For Credit Losses And Exposure Individually Evaluated For Impairment	$1,260	$1,036
Financing Receivable, Allowance for Credit Losses, Factors that Influenced Management's Judgment	Factors considered in assessing collectability and risk include, but are not limited to, examination of credit quality indicators and other evaluation measures, underlying value of any collateral or security interests, significant past due balances, historical losses, and existing economic conditions.

Credit_Quality_of_Longterm_Rec3

Credit Quality of Long-term Receivables (Class and Credit Risk Information) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	$1,260	$1,177
Long-term Trade Accounts Receivable Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	630	593
Notes And Leases Receivable Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	630	584
A Low Risk Internally Assigned Grade [Member] \| Long-term Trade Accounts Receivable Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	607	569
A Low Risk Internally Assigned Grade [Member] \| Notes And Leases Receivable Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	30	26
B Moderate Risk Internally Assigned Grade [Member] \| Long-term Trade Accounts Receivable Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	20	21
B Moderate Risk Internally Assigned Grade [Member] \| Notes And Leases Receivable Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	478	458
C High Risk Internally Assigned Grade [Member] \| Long-term Trade Accounts Receivable Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	3	3
C High Risk Internally Assigned Grade [Member] \| Notes And Leases Receivable Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	122	100
D In Default Uncollateralized Internally Assigned Grade [Member] \| Long-term Trade Accounts Receivable Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0
D In Default Uncollateralized Internally Assigned Grade [Member] \| Notes And Leases Receivable Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	$0	$0

Shareowners_Equity_and_Noncont2

Shareowners' Equity and Noncontrolling Interest (Summary of Changes in Shareowners' Equity and Noncontrolling Interest) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Equity, beginning of period	$28,369,000,000	$23,725,000,000	$27,069,000,000	$22,820,000,000
Net income	1,543,000,000	1,511,000,000	4,544,000,000	3,340,000,000
Total other comprehensive income (loss)	692,000,000	1,035,000,000	114,000,000	831,000,000
Total comprehensive income for the period	2,235,000,000	2,546,000,000	4,658,000,000	4,171,000,000
Common Stock issued under employee plans	312,000,000	275,000,000	764,000,000	608,000,000
Common Stock repurchased	-330,000,000	0	-1,000,000,000	0
Treasury stock reissued under employee plans	0	141,000,000	0	141,000,000
Quarterly Contract Adjustment Payments to Equity Units Holders	0	0	0	-216,000,000
Dividends on Common Stock	-465,000,000	-463,000,000	-1,395,000,000	-1,288,000,000
Dividends on ESOP Common Stock	-17,000,000	-18,000,000	-51,000,000	-50,000,000
Dividends attributable to noncontrolling interest	-161,000,000	-162,000,000	-288,000,000	-292,000,000
Purchase of subsidiary shares from noncontrolling interest	-73,000,000	-12,000,000	-103,000,000	-23,000,000
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	0	17,000,000	242,000,000	52,000,000
Acquisition of noncontrolling interest	0	39,000,000	0	94,000,000
Disposition of noncontrolling interest	-1,000,000	0	-6,000,000	-4,000,000
Redeemable Noncontrolling Interest in Subsidiaries Earning	-1,000,000	-11,000,000	-3,000,000	-22,000,000
Redeemable noncontrolling interest in other comprehensive income (loss)	-1,000,000	-7,000,000	5,000,000	1,000,000
Noncontrolling Interest, Change in Redemption Value	0	0	0	-1,000,000
Redeemable noncontrolling interest reclassification to noncontrolling interest	52,000,000	21,000,000	27,000,000	100,000,000
Equity, end of period	29,919,000,000	26,091,000,000	29,919,000,000	26,091,000,000
Redeemable noncontrolling interest, beginning of period	174,000,000	238,000,000	238,000,000	358,000,000
Redeemable noncontrolling interest, end of period	124,000,000	233,000,000	124,000,000	233,000,000
Transfers to noncontrolling interests - Decrease in common stock for purchase of subsidiary shares	-17,000,000	-11,000,000	-36,000,000	-19,000,000
Change from net income attributable to common shareowners and transfers to noncontrolling interest	1,415,000,000	1,404,000,000	4,222,000,000	3,054,000,000
Accumulated other comprehensive loss	-5,325,000,000		-5,325,000,000		-5,448,000,000
Shareowners' Equity [Member]
Equity, beginning of period	26,987,000,000	22,604,000,000	25,914,000,000	21,880,000,000
Net income	1,432,000,000	1,415,000,000	4,258,000,000	3,073,000,000
Total other comprehensive income (loss)	675,000,000	1,012,000,000	123,000,000	827,000,000
Total comprehensive income for the period	2,107,000,000	2,427,000,000	4,381,000,000	3,900,000,000
Common Stock issued under employee plans	312,000,000	275,000,000	764,000,000	608,000,000
Common Stock repurchased	-330,000,000	0	-1,000,000,000	0
Treasury stock reissued under employee plans	0	141,000,000	0	141,000,000
Quarterly Contract Adjustment Payments to Equity Units Holders	0	0	0	-216,000,000
Dividends on Common Stock	-465,000,000	-463,000,000	-1,395,000,000	-1,288,000,000
Dividends on ESOP Common Stock	-17,000,000	-18,000,000	-51,000,000	-50,000,000
Purchase of subsidiary shares from noncontrolling interest	-17,000,000	-11,000,000	-36,000,000	-19,000,000
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	0	0	0	0
Noncontrolling Interest, Change in Redemption Value	0	0	0	-1,000,000
Equity, end of period	28,577,000,000	24,955,000,000	28,577,000,000	24,955,000,000
Noncontrolling Interest [Member]
Equity, beginning of period	1,382,000,000	1,121,000,000	1,155,000,000	940,000,000
Net Income (Loss) Attributable to Noncontrolling Interest	111,000,000	96,000,000	286,000,000	267,000,000
Total other comprehensive income (loss)	17,000,000	23,000,000	-9,000,000	4,000,000
Total comprehensive income for the period	128,000,000	119,000,000	277,000,000	271,000,000
Dividends attributable to noncontrolling interest	-161,000,000	-162,000,000	-288,000,000	-292,000,000
Purchase of subsidiary shares from noncontrolling interest	-56,000,000	-1,000,000	-67,000,000	-4,000,000
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	0	17,000,000	242,000,000	52,000,000
Acquisition of noncontrolling interest	0	39,000,000	0	94,000,000
Disposition of noncontrolling interest	-1,000,000	0	-6,000,000	-4,000,000
Redeemable Noncontrolling Interest in Subsidiaries Earning	-1,000,000	-11,000,000	-3,000,000	-22,000,000
Redeemable noncontrolling interest in other comprehensive income (loss)	-1,000,000	-7,000,000	5,000,000	1,000,000
Redeemable noncontrolling interest reclassification to noncontrolling interest	52,000,000	21,000,000	27,000,000	100,000,000
Equity, end of period	1,342,000,000	1,136,000,000	1,342,000,000	1,136,000,000
Redeemable Noncontrolling Interest [Member]
Net income	1,000,000	11,000,000	3,000,000	22,000,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	1,000,000	7,000,000	-5,000,000	-1,000,000
Dividends attributable to noncontrolling interest	0	-2,000,000	-3,000,000	-13,000,000
Purchase of subsidiary shares from noncontrolling interest	0	0	0	-34,000,000
Disposition of noncontrolling interest	0	0	-82,000,000	0
Noncontrolling Interest, Change in Redemption Value	0	0	0	1,000,000
Redeemable noncontrolling interest reclassification to noncontrolling interest	($52,000,000)	($21,000,000)	($27,000,000)	($100,000,000)

Shareowners_Equity_and_Noncont3

Shareowners' Equity and Noncontrolling Interest (Reclass and Changes in Accumulated Other Comprehensive Income) (Details) (USD $)	3 Months Ended			9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	($5,325)			($5,325)			($5,448)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				-320
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				443
Income Tax Expense (Benefit)	614		484	1,677		1,257
Sales Revenue, Goods, Net	11,243		10,839	33,159		28,843
Other Income	187		211	917		851
Income from continuing operations	1,526		1,341	4,523		4,163
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	-28			-28			3
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				-48
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				17
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)	-1			3
Income from continuing operations	1			-20
Net Income (Loss) Available to Common Stockholders, Basic	0			-17
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member] \| Foreign Exchange Contract [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Sales Revenue, Goods, Net	1			-22
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member] \| Other Contract [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other Income	0			2
Accumulated Translation Adjustment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	246			246			654
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				-439
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				31
Accumulated Translation Adjustment [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other Income	1			-31
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	-5,778			-5,778			-6,250
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				27
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				445
Accumulated Defined Benefit Plans Adjustment [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)	71			235
Other Comprehensive (Income) Loss Amortization Adjustment from AOCI Pension and Other Postretirement Benefit Plans for Net Prior Service Cost (Credit) and Net Transition Asset (Obligation), before Tax	10	[1]		34	[1]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax	-236	[1]		-714	[1]
Income from continuing operations	-226			-680
Net Income (Loss) Available to Common Stockholders, Basic	-155			-445
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss	235			235			145
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax				140
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax				-50
Accumulated Net Unrealized Investment Gain (Loss) [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense (Benefit)	-10			-31
Other Income	27			81
Net Income (Loss) Available to Common Stockholders, Basic	$17			$50

[1]	(1) These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 7 for additional details).

Guarantees_Details

Guarantees (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Guarantor Obligations [Line Items]
Service and product warranties and product performance guarantees - beginning of year	$1,332	$1,468
Warranties and performance guarantees issued	232	235
Settlements made	-223	-217
Product warranty accrual - other	22	-165
Service and product warranties and product performance guarantees - end of period	1,363	1,321
Performance Guarantee [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$124

Contingent_Liabilities_Details

Contingent Liabilities (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Loss Contingencies [Line Items]
Business Acquisition, Purchase Price Allocation, Environmental Liabilities Assumed	$325
Department of Justice Lawsuit Against Pratt and Whitney [Member]
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	1999
Loss Contingency Allegations	As previously disclosed, the United States government sued us in 1999 in the United States District Court for the Southern District of Ohio, claiming that PrattB & Whitney violated the civil False Claims Act and common law. The claims relate to the bFighter Engine Competitionb between PrattB & Whitney's F100 engine and General Electric's F110 engine. The government alleged that it overpaid for F100 engines under contracts awarded by the U.S. Air Force in fiscal years 1985 through 1990 because PrattB & Whitney inflated its estimated costs for some purchased parts and withheld data that would have revealed the overstatements. At trial, which ended in April, 2005, the government claimed PrattB & Whitney's liability to be approximately $624 million.B
Loss Contingency, Settlement Agreement, Terms	On June 17, 2013, the trial court awarded the government approximately $473 million in damages and penalties, plus prejudgment interest in an amount to be determined.B On July 1, 2013, the trial court, after determining the amount of prejudgment interest, entered judgment in favor of the government in the amount of approximately $664 million. The trial court also awarded postjudgment interest on the full amount of the judgment to accrue from July 2, 2013, at the federal variable interest rate determined pursuant to 28 U.S.C. B' 1961. The judgment included four different components of damages: (1) common law damages of approximately $109 million; (2) prejudgment interest on common law damages of approximately $191 million; (3) False Claims Act treble damages of approximately $357 million; and (4) penalties of approximately $7 million.B The penalty component of the judgment previously was affirmed by the United States Court of Appeals in 2010.
Loss Contingency Period Of Occurrence	fiscal years 1985 through 1990
Loss Contingency Damages Sought	624
Loss Contingency Actions Taken By Court Arbitrator Or Mediator	On AugustB 1, 2008, the trial court held that the Air Force had not suffered any actual damages because PrattB & Whitney had made significant price concessions after the alleged overstatements were made. However, the trial court judge found that PrattB & Whitney violated the False Claims Act due to inaccurate statements contained in its 1983 initial engine pricing proposal.B In the absence of actual damages, the trial court awarded the government the maximum civil penalty of approximately $7 million, or $10,000 for each of the 709 invoices PrattB & Whitney submitted in 1989 and later under the contracts.
Loss Contingency Actions Taken By Plaintiff And Defendant	In September 2008, both the government and UTC appealed the decision to the United States Court of Appeals for the Sixth Circuit.B On November 18, 2010, the Sixth Circuit affirmed PrattB & Whitney's liability under the False Claims Act, but remanded the case to the trial court for further proceedings on the issues of False Claims Act damages and common law liability and damages.
Loss Contingency Actions Taken By Defendant	We strongly disagree with the trial court's analysis and conclusions.B We filed an appeal from the judgment to the United States Court of Appeals for the Sixth Circuit on August 26, 2013. Based on our analysis, we continue to believe that there is no basis for any common law liability for the inaccurate statements.B We alsoB believe that the government suffered no actual damages as a result of the inaccurate statements made in 1983 and, therefore, there is no basis in fact or law for the award of common law damages, prejudgment interest or False Claims Act treble damages. If, contrary to our expectations, all or any portion of the judgment should ultimately be affirmed, we estimate a range of possible loss from approximately $24 million to $657 million in excess of amounts previously accrued, plus postjudgment interest.B The outcome of this matter could result in a material adverse effect on our results of operations in the period in which a liability would be recognized and cash flows for the period in which damages would be paid.
Loss Contingency Settlement Agreement Date	6/17/13
Loss Contingency, Range of Possible Loss, Minimum	24
Loss Contingency, Range of Possible Loss, Maximum	657
Loss Contingency Damages Awarded Value, Not Including Interest	473
Loss Contingency, Damages Awarded, Value	$664
Department of Defense Contract Claim Against Sikorsky [Member]
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	Dec-08
Loss Contingency Allegations	As previously disclosed, in December 2008, the Department of Defense (DOD) issued a contract claim against Sikorsky to recover overpayments the DOD alleges that it made to Sikorsky since January 2003 in connection with cost accounting changes approved by the DOD and implemented by Sikorsky in 1999 and 2006. These changes relate to the calculation of material overhead rates in government contracts. The DOD claimed that Sikorsky's liability was approximately $96 million (including interest through September 30, 2013).
Loss Contingency Damages Sought	$96 million (including interest through September 30, 2013)
Loss Contingency Actions Taken By Plaintiff And Defendant	We believed this claim was without merit and Sikorsky filed an appeal in December 2009 with the U.S. Court of Federal Claims. Trial in the matter concluded in January 2013, and on March 22, 2013, the U.S. Court of Federal Claims issued a written decision in favor of Sikorsky determining that the DOD had failed to prove its claims because Sikorsky's calculation of material overhead complied with the cost accounting standards. While the DOD has appealed this decision, we do not believe the ultimate resolution of this matter will have a material adverse effect on our competitive position, results of operations, cash flows or financial condition.
Loss Contingency Settlement Agreement Date	22-Mar-13
US Air Force Claim Against Pratt And Whitney [Member]
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	18-Jun-12
Loss Contingency Allegations	On JuneB 18, 2012, the trial court found that PrattB & Whitney had breached obligations imposed by common law based on the same conduct with respect to which the court previously found liability under the False Claims Act. Under the common law claims, the U.S. Air Force is entitled to seek damages for events occurring before MarchB 3, 1989, which are not recoverable under the False Claims Act.
Loss Contingency Damages Sought	624
German Tax Office Against Otis [Member]
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	3-Aug-12
Loss Contingency Allegations	As previously disclosed, UTC is involved in litigation in Germany concerning €204B million (approximately $275 million) of tax benefits that we have claimed related to a 1998 reorganization of the corporate structure of Otis operations in Germany. A portion of these tax benefits were disallowed by the local German Tax Office on JulyB 5, 2012, as a result of the audit of tax years 1999 to 2000.B The legal and factual issues relating to the denial of the tax benefits center on the interpretation and application of a German tax law.B
Loss Contingency Damages Sought	€204B million (approximately $275 million)
Loss Contingency Actions Taken By Defendant	On AugustB 3, 2012, the Company filed suit in the local German tax court and intends to litigate vigorously the matter to conclusion. We do not believe the resolution of this matter will have a material adverse effect on our results of operations, cash flows or financial condition.
French Tax Authority [Member]
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	2013
Loss Contingency Allegations	UTC has also been involved in administrative review proceedings with the French Revenue Authority concerning €237 million (approximatelyB $320 million) related to certain deductions claimed in France for tax years 2008 through 2011 that the French Revenue Authority has proposed to disallow.B
Loss Contingency Damages Sought	€237 million (approximatelyB $320 million)
Loss Contingency Actions Taken By Defendant	This is a recurring issue and it is expected that similar challenges will be raised in subsequent tax years until the issue is resolved.B Resolution discussions with the French Revenue Authority on this matter have been unsuccessful to date and UTC may be required to pursue the defense of the issue through litigation, which could be commenced as early as the fourth quarter of 2013.B UTC intends to assert a vigorous defense and believes it should prevail on the issue.B Accordingly, no accrual has been made for this matter.B

Segment_Financial_Data_Narrati

Segment Financial Data (Narrative) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
UTC Building and Industrial Systems [Member]
Segment Reporting Information [Line Items]
Effective Date of Announcement of Changes in Organizational Structure	23-Sep-13
Auxiliary Power Unit (APU) [Member]
Segment Reporting Information [Line Items]
Business Acquisition Revenue Reported By Acquired Entity For Current Year	600
Effective Date of Announcement of Changes in Organizational Structure	JulyB 1, 2012

Segment_Financial_Data_Table_D

Segment Financial Data (Table) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Total net sales	$15,462	$15,042	$45,867	$41,265
Operating profit	2,366	2,041	6,879	5,933
Operating profit margin	15.30%	13.60%	15.00%	14.40%
Otis [Member]
Segment Reporting Information [Line Items]
Total net sales	3,188	3,054	9,140	8,851
Operating profit	681	651	1,906	1,868
Operating profit margin	21.40%	21.30%	20.90%	21.10%
UTC Climate Controls and Security [Member]
Segment Reporting Information [Line Items]
Total net sales	4,237	4,259	12,617	12,943
Operating profit	696	632	1,968	1,965
Operating profit margin	16.40%	14.80%	15.60%	15.20%
Pratt and Whitney [Member]
Segment Reporting Information [Line Items]
Total net sales	3,386	3,574	10,412	10,073
Operating profit	439	409	1,412	1,225
Operating profit margin	13.00%	11.40%	13.60%	12.20%
UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Total net sales	3,312	2,670	9,896	5,160
Operating profit	501	271	1,501	680
Operating profit margin	15.10%	10.10%	15.20%	13.20%
Sikorsky [Member]
Segment Reporting Information [Line Items]
Total net sales	1,541	1,649	4,356	4,615
Operating profit	159	203	405	552
Operating profit margin	10.30%	12.30%	9.30%	12.00%
Total Segments [Member]
Segment Reporting Information [Line Items]
Total net sales	15,664	15,206	46,421	41,642
Operating profit	2,476	2,166	7,192	6,290
Operating profit margin	15.80%	14.20%	15.50%	15.10%
Eliminations and other [Member]
Segment Reporting Information [Line Items]
Total net sales	-202	-164	-554	-377
Operating profit	7	-22	32	-54
General corporate expenses [Member]
Segment Reporting Information [Line Items]
Total net sales	0	0	0	0
Operating profit	($117)	($103)	($345)	($303)

Accounting_Pronouncements_Deta

Accounting Pronouncements (Details)	9 Months Ended
Accounting Pronouncements (Details)	Sep. 30, 2013
ASU No. 2013-05 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	In March 2013, the FASB issued ASU No. 2013-05, "Parent's Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Group of Assets within a Foreign Entity or of an Investment in a Foreign Entity." This ASU is intended to eliminate diversity in practice on the release of cumulative translation adjustment into net income when a parent either sells a part or all of its investment in a foreign entity or no longer holds a controlling financial interest. In addition, the amendments in this ASU resolve the diversity in practice for the treatment of business combinations achieved in stages (sometimes also referred to as step acquisitions) involving a foreign entity. The provisions of this ASU are effective for interim and annual periods beginning after December 15, 2013 and must be applied prospectively. This ASU is not expected to have a material impact on our financial statements or disclosures.
ASU No. 2013-10 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	In July 2013, the FASB issued ASU No. 2013-10, "Inclusion of the Fed Funds Effective Swap Rate (or Overnight Index Swap Rate) as a Benchmark Interest Rate for Hedge Accounting Purposes." This ASU is intended to permit the Fed Funds Effective Swap Rate to be used as a U.S. benchmark interest rate for hedge accounting purposes under FASB ASC Topic 815, "Derivatives and Hedging", in addition to UST and LIBOR, as well as to remove the restriction on using different benchmark rates for similar hedges. B The provisions of this ASU are effective for new or redesignated hedging relationships entered into on or after July 17, 2013. This ASU is not expected to have a material effect on our financial statements or disclosures.
ASU No. 2013-11 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	In July 2013, the FASB issued ASU No. 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists." This ASU is intended to provide guidance and reduce diversity in practice in the presentation of an unrecognized tax benefit when a tax loss or credit carryforward exists. The provisions of this ASU are effective for periods beginning after December 15, 2013 and must be applied prospectively for unrecognized tax benefits that exist at the effective date. Early adoption is permitted. There are no material effects on, or changes to, our financial statements or disclosures as a result of this ASU.