RTX (RTX) 10-K5 Feb 152014 FY Annual reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
Document and Entity Information (USD $)	Dec. 31, 2014	Jan. 31, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Document Type	10-K
Document Period End Date	31-Dec-14
Amendment Flag	FALSE
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
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			$105,494,938,493
Entity Common Stock, Shares Outstanding		907,156,995

Consolidated_Statement_of_Oper

Consolidated Statement of Operations (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Sales:
Product sales	$47,632	$45,253	$40,729
Service sales	17,468	17,373	16,979
Net Sales	65,100	62,626	57,708
Costs and Expenses:
Cost of products sold	36,044	34,063	31,094
Cost of services sold	11,403	11,258	11,059
Research and development	2,635	2,529	2,371
Selling, general and administrative	6,500	6,718	6,452
Total costs and expenses	56,582	54,568	50,976
Other income, net	1,251	1,151	952
Operating profit	9,769	9,209	7,684
Interest expense, net	882	897	773
Income from continuing operations before income taxes	8,887	8,312	6,911
Income tax expense	2,264	2,238	1,711
Net income from continuing operations	6,623	6,074	5,200
Less: Noncontrolling interest in subsidiaries' earnings from continuing operations	403	388	353
Income from continuing operations attributable to common shareowners	6,220	5,686	4,847
Discontinued operations (Note 3):
Income (loss) from operations	0	63	-998
(Loss) gain on disposal	0	-33	2,030
Income tax benefit (expense)	0	5	-742
Net income from discontinued operations	0	35	290
Less: Noncontrolling interest in subsidiaries' earnings from discontinued operations	0	0	7
Income from discontinued operations attributable to common shareowners	0	35	283
Net income attributable to common shareowners	$6,220	$5,721	$5,130
Earnings Per Share of Common Stock - Basic:
Net income from continuing operations attributable to common shareowners	$6.92	$6.31	$5.41
Net income attributable to common shareowners	$6.92	$6.35	$5.73
Earnings Per Share of Common Stock - Diluted:
Net income from continuing operations attributable to common shareowners	$6.82	$6.21	$5.35
Net income attributable to common shareowners	$6.82	$6.25	$5.66
Dividends Per Share of Common Stock	$2.36	$2.19	$2.03
Weighted average number of shares outstanding:
Basic shares	898.3	901	895.2
Diluted shares	911.6	915.1	906.6

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income from continuing operations	$6,623	$6,074	$5,200
Net income from discontinued operations	0	35	290
Net income	6,623	6,109	5,490
Foreign currency translation adjustments
Foreign currency translation adjustments arising during period	-1,302	-523	556
Reclassification adjustments for loss (gain) on sale of an investment in a foreign entity recognized in net income	7	25	-100
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Parent	-1,295	-498	456
Change in pension and post-retirement benefit plans
Net actuarial (loss) gain arising during the period	-4,362	3,987	-1,542
Prior service (cost) credit arising during period	-5	-225	211
Other	121	50	-3
Less: amortization of actuarial loss, prior service cost, and transition obligation	416	906	689
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent	-3,830	4,718	-645
Tax (expense) benefit	1,388	-1,735	205
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent	-2,442	2,983	-440
Unrealized gain (loss) on available-for-sale securities
Unrealized holding gain arising during period	35	332	91
Less: reclassification adjustments for gain included in Other income, net	-20	-91	-123
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent	15	241	-32
Tax (expense) benefit	-3	-90	13
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	12	151	-19
Change in unrealized cash flow hedging
Unrealized cash flow hedging (loss) gain arising during period	-263	-134	88
Loss (gain) reclassified into Product sales	96	25	-31
Gain reclassified into Other income, net	0	-2	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Parent	-167	-111	57
Tax benefit (expense)	37	29	-4
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent	-130	-82	53
Other comprehensive income (loss), net of tax	-3,855	2,554	50
Comprehensive income	2,768	8,663	5,540
Less: Comprehensive income attributable to noncontrolling interest	-329	-374	-368
Comprehensive income atrributable to common shareowners	$2,439	$8,289	$5,172

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$5,235	$4,619
Accounts receivable (net of allowance for doubtful accounts of $485 and $488)	11,317	11,458
Inventories and contracts in progress, net	9,865	10,330
Future income tax benefits, current	1,931	1,964
Other assets, current	1,410	1,071
Total Current Assets	29,758	29,442
Customer financing assets	978	1,156
Future income tax benefits	1,494	1,236
Fixed assets, net	9,276	8,866
Goodwill	27,796	28,168
Intangible assets, net	15,560	15,521
Other assets	6,427	6,205
Total Assets	91,289	90,594
Liabilities and Equity
Short-term borrowings	126	388
Accounts payable	6,967	6,965
Accrued liabilities	14,006	15,335
Long-term debt currently due	1,796	112
Total Current Liabilities	22,895	22,800
Long-term debt	17,872	19,741
Future pension and postretirement benefit obligations	6,683	3,444
Other long-term liabilities	11,135	11,279
Total Liabilities	58,585	57,264
Commitments and contingent liabilities (Notes 5 and 17)
Redeemable noncontrolling interest	140	111
Capital Stock:
Preferred Stock, $1 par value; 250,000 shares authorized; None issued or outstanding	0	0
Common Stock, $1 par value; 4,000,000 shares authorized; 1,423,684 and 1,417,724 shares issued	15,300	14,764
Treasury Stockâ€” 514,309 and 501,038 common shares at average cost	-21,922	-20,431
Retained earnings	44,611	40,539
Unearned ESOP shares	-115	-126
Total Accumulated other comprehensive loss	-6,661	-2,880
Total Shareowners' Equity	31,213	31,866
Noncontrolling interest	1,351	1,353
Total Equity	32,564	33,219
Total Liabilities and Equity	$91,289	$90,594

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$485	$488
Preferred Stock, par value	$1	$1
Preferred Stock. shares authorized	250,000	250,000
Preferred Stock, shares issued	0	0
Common Stock, par value	$1	$1
Common Stock, shares authorized	4,000,000
Common Stock, Shares, Issued	1,423,684	1,417,724
Treasury Stock, shares	514,309	501,038

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Activities of Continuing Operations:
Net income attributable to common shareowners	$6,220	$5,721	$5,130
Noncontrolling interest in subsidiaries' earnings	403	388	360
Net income	6,623	6,109	5,490
Less: Net income from discontinued operations	0	35	290
Net income from continuing operations	6,623	6,074	5,200
Adjustments to reconcile income from continuing operations to net cash flows provided by operating activities of continuing operations:
Depreciation and amortization	1,907	1,821	1,524
Deferred income tax provision	376	242	120
Stock compensation cost	240	275	210
Change in:
Accounts receivable	7	-531	-165
Inventories and contracts in progress	-1,091	-1,096	-539
Other current assets	-123	74	-4
Accounts payable and accrued liabilities	-40	1,354	811
Global pension contributions	-517	-108	-430
Other operating activities, net	-46	-600	-122
Net cash flows provided by operating activities of continuing operations	7,336	7,505	6,605
Investing Activities of Continuing Operations:
Capital expenditures	-1,711	-1,688	-1,389
Increase in customer financing assets	-202	-245	-100
Decrease in customer financing assets	331	110	75
Investments in businesses	-402	-151	-16,026
Dispositions of businesses	344	1,560	425
Increase in collaboration intangible assets	-593	-722	-1,543
Other investing activities, net	-72	-328	-237
Net cash flows used in investing activities of continuing operations	-2,305	-1,464	-18,795
Financing Activities of Continuing Operations:
Issuance of long-term debt	99	92	10,899
Repayment of long-term debt	-305	-2,862	-842
Decrease in short-term borrowings, net	-346	-113	-214
Common Stock issued under employee stock plans	187	378	522
Dividends paid on Common Stock	-2,048	-1,908	-1,752
Repurchase of Common Stock	-1,500	-1,200	0
Other financing activities, net	-346	-327	-592
Net cash flows (used in) provided by financing activities of continuing operations	-4,259	-5,940	8,021
Discontinued Operations:
Net cash (used in) provided by operating activities	0	-628	41
Net cash provided by investing activities	0	351	2,974
Net cash flows (used in) provided by discontinued operations	0	-277	3,015
Effect of foreign exchange rate changes on cash and cash equivalents	-156	-41	30
Net increase (decrease) in cash and cash equivalents	616	-217	-1,124
Cash and cash equivalents, beginning of year	4,619	4,836	5,960
Cash and cash equivalents, end of year	5,235	4,619	4,836
Less: Cash and cash equivalents of businesses held for sale	0	0	17
Cash and cash equivalents of continuing operations, end of year	5,235	4,619	4,819
Supplemental Disclosure of Cash Flow Information:
Interest paid, net of amounts capitalized	1,077	1,047	725
Income taxes paid, net of refunds	$2,024	$2,789	$1,772

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Equity (USD $)	Total	Common Stock [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Unearned ESOP Shares [Member]	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interest	Redeemable Non-controlling Interest [Member]
In Millions, unless otherwise specified	Total	Common Stock [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Unearned ESOP Shares [Member]	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interest	Redeemable Non-controlling Interest [Member]
Balance at Dec. 31, 2011	$22,820	$13,445	($19,410)	$33,487	($152)	($5,490)	$940	$358
Comprehensive income (loss):
Net income	5,490			5,130			360
Redeemable noncontrolling interest in subsidiaries' earnings	-24						-24	24
Other comprehensive income (loss), net of tax	44					42	2	6
Common Stock issued under employee plans, net of tax benefit	654	643	18	-20	13
Treasury Stock reissued under employee plans	279	138	141
Equity Units issuance	-216	-216
Dividends on Common Stock	-1,752			-1,752
Dividends on ESOP Common Stock	-67			-67
Dividends attributable to noncontrolling interest	-337						-337	-18
Redeemable noncontrolling interest accretion	-2			-2				2
Purchase of subsidiary shares from noncontrolling interest	-38	-34					-4	-34
Sale of subsidiary shares in noncontrolling interest	52						52
Other	66						66
Redeemable noncontrolling interest reclassification to noncontrolling interest	100						100	-100
Balance at Dec. 31, 2012	27,069	13,976	-19,251	36,776	-139	-5,448	1,155	238
Comprehensive income (loss):
Net income	6,109			5,721			388
Redeemable noncontrolling interest in subsidiaries' earnings	-5						-5	5
Other comprehensive income (loss), net of tax	2,563					2,568	-5	-9
Common Stock issued under employee plans, net of tax benefit	889	837	20	19	13
Common Stock Repurchased	-1,200		-1,200
Dividends on Common Stock	-1,908			-1,908
Dividends on ESOP Common Stock	-69			-69
Dividends attributable to noncontrolling interest	-355						-355	-5
Purchase of subsidiary shares from noncontrolling interest	-116	-49					-67	-3
Sale of subsidiary shares in noncontrolling interest	243						243
Other	-11						-11	-16
Disposition of noncontrolling interest	-7						-7	-82
Redeemable noncontrolling interest reclassification to noncontrolling interest	17						17	-17
Balance at Dec. 31, 2013	33,219	14,764	-20,431	40,539	-126	-2,880	1,353	111
Comprehensive income (loss):
Net income	6,623			6,220			403
Redeemable noncontrolling interest in subsidiaries' earnings	-9						-9	9
Other comprehensive income (loss), net of tax	-3,848					-3,781	-67	-7
Common Stock issued under employee plans, net of tax benefit	598	607	9	-29	11
Common Stock Repurchased	-1,500		-1,500
Dividends on Common Stock	-2,048			-2,048
Dividends on ESOP Common Stock	-71			-71
Dividends attributable to noncontrolling interest	-318						-318	-3
Purchase of subsidiary shares from noncontrolling interest	-93	-75					-18
Sale of subsidiary shares in noncontrolling interest	15	4					11
Other	12						12	14
Redeemable noncontrolling interest reclassification to noncontrolling interest	-16						-16	16
Balance at Dec. 31, 2014	$32,564	$15,300	($21,922)	$44,611	($115)	($6,661)	$1,351	$140

Consolidated_Statement_of_Chan1

Consolidated Statement of Changes in Equity (Parenthetical) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Common Stock issued under employee plans, shares	6.2	10.4	8
Tax benefit from Common Stock issued under employee plans	$103	$115	$67
Common Stock repurchased, shares	13.5	12.6
Treasury stock reissued under employee plans, shares			3.6

Schedule_II_Valuation_and_Qual

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2014
SEC Schedule Article 12-09 Valuation And Qualifying Accounts [Abstract]
Schedule Of Valuation And Qualifying Accounts Disclosure [Text Block]	SCHEDULE II
	UNITED TECHNOLOGIES CORPORATION AND SUBSIDIARIES
	Valuation and Qualifying Accounts
	Three years ended December 31, 2014
	(Millions of Dollars)



	Allowances for Doubtful Accounts and Other Customer Financing Activity:
	Balance December 31, 2011	$	456

	Provision charged to income	72

	Doubtful accounts written off (net)	(23		)
	Other adjustments	12

	Balance December 31, 2012	517

	Provision charged to income	74

	Doubtful accounts written off (net)	(68		)
	Other adjustments	20

	Balance December 31, 2013	543

	Provision charged to income	93

	Doubtful accounts written off (net)	(91		)
	Other adjustments	(41		)
	Balance December 31, 2014	$	504

	Future Income Tax Benefits—Valuation allowance:
	Balance December 31, 2011	977

	Additions charged to income tax expense	124

	Additions charged to goodwill, due to acquisitions	71

	Reductions credited to income tax expense	(245		)
	Other adjustments	(23		)
	Balance December 31, 2012	904

	Additions charged to income tax expense	134

	Additions charged to goodwill, due to acquisitions	12

	Reductions credited to income tax expense	(52		)
	Other adjustments	(56		)
	Balance December 31, 2013	942

	Additions charged to income tax expense	91

	Reductions credited to income tax expense	(55		)
	Other adjustments 1	(366		)
	Balance December 31, 2014	$	612


	Note 1: Included in Other adjustments for the year ended December 31, 2014 are reductions in valuation allowances associated with an agreement with a state taxing authority for the monetization of tax credits.

Summary_of_Accounting_Principl

Summary of Accounting Principles

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Summary of Accounting Principles

SUMMARY OF ACCOUNTING PRINCIPLES

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

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

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

On occasion, we are required to maintain cash deposits with certain banks with respect to contractual obligations related to acquisitions or divestitures or other legal obligations. As of December 31, 2014 and 2013, the amount of such restricted cash was approximately $255 million and $47 million, respectively.

Accounts Receivable. Current and long-term accounts receivable as of December 31, 2014 include retainage of $147 million and unbilled receivables of $2,624 million, which includes approximately $823 million of unbilled receivables under commercial aerospace long-term aftermarket contracts. Current and long-term accounts receivable as of December 31, 2013 include retainage of $173 million and unbilled receivables of $2,172 million, which includes approximately $677 million of unbilled receivables under commercial aerospace long-term aftermarket contracts. See Note 5 for discussion of commercial aerospace industry assets and commitments.

Retainage represents amounts that, pursuant to the applicable contract, are not due until project completion and acceptance by the customer. Unbilled receivables represent revenues that are not currently billable to the customer under the terms of the contract. These items are expected to be collected in the normal course of business.

Marketable Equity Securities. Equity securities that have a readily determinable fair value and that we do not intend to trade are classified as available-for-sale and carried at fair value. Unrealized holding gains and losses are recorded as a separate component of shareowners' equity, net of deferred income taxes.

Inventories and Contracts in Progress. Inventories and contracts in progress are stated at the lower of cost or estimated realizable value and are primarily based on first-in, first-out (FIFO) or average cost methods; however, certain UTC Aerospace Systems and UTC Climate, Controls & Security entities use the last-in, first-out (LIFO) method. If inventories that were valued using the LIFO method had been valued under the FIFO method, they would have been higher by $130 million and $133 million at December 31, 2014 and 2013, respectively.

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

Equity Method Investments. Investments in which we have the ability to exercise significant influence, but do not control, are accounted for under the equity method of accounting and are included in Other assets on the Consolidated Balance Sheet. Under this method of accounting, our share of the net earnings or losses of the investee is included in Other income, net on the Consolidated Statement of Operations since the activities of the investee are closely aligned with the operations of the business segment holding the investment. We evaluate our equity method investments whenever events or changes in circumstance indicate that the carrying amounts of such investments may be impaired. If a decline in the value of an equity method investment is determined to be other than temporary, a loss is recorded in earnings in the current period.

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

Intangible assets consist of service portfolios, patents, trademarks/tradenames, customer relationships and other intangible assets including a collaboration asset established in connection with the restructuring of participants' interests in IAE as discussed further in Note 2. Acquired intangible assets are recognized at fair value in purchase accounting and then amortized to cost of sales and selling, general & administrative expenses over the applicable useful lives. Also included within other intangible assets are commercial aerospace payments made to secure certain contractual rights to provide product on new aircraft platforms. Consideration paid on these contractual commitments is capitalized when it is no longer conditional.

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

Collaboration asset

30 years

Customer relationships and related programs

2 to 32 years

Purchased service contracts

5 to 31 years

Patents & trademarks

3 to 40 years

Exclusivity assets

3 to 25 years

Other Long-Lived Assets. We evaluate the potential impairment of other long-lived assets when appropriate. If the carrying value of other long-lived assets held and used exceeds the sum of the undiscounted expected future cash flows, the carrying value is written down to fair value.

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

Long-term trade accounts receivable 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 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 Consolidated Balance Sheet. The following table summarizes the balance by class of aerospace long-term receivables as of December 31, 2014 and 2013:

(dollars in millions)

2014

2013

Long-term trade accounts receivable

838

714

Notes and leases receivable

424

583

Total long-term receivables

1,262

1,297

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

We determine credit ratings for each customer in our portfolio based upon public information and information obtained directly from our customers. We conduct a review of customer credit ratings, published historical credit default rates for different rating categories, and multiple third party aircraft value publications as a basis to validate the reasonableness of the allowance for losses on these balances quarterly or when events and circumstances warrant. Customer credit ratings range from an extremely strong capacity to meet financial obligations, to customers whose uncollateralized receivable is in default. There can be no assurance that actual results will not differ from estimates or that consideration of these factors in the future will not result in an increase or decrease to the allowance for credit losses on long-term receivables. Based upon the customer credit ratings, approximately 8% and 9% of the total long-term receivables reflected in the table above were considered to bear high credit risk as of December 31, 2014 and 2013, respectively. See Note 5 for further discussion of commercial aerospace industry assets and commitments.

Reserves for credit losses on receivables relate to specifically identified receivables that are evaluated individually for impairment. For notes and leases receivable we determine a specific reserve for exposure based on the difference between the carrying value of the receivable and the estimated fair value of the related collateral in connection with the evaluation of credit risk and collectability. For long-term trade accounts receivable, we evaluate credit risk and collectability individually to determine if an allowance is necessary. Our long-term receivables reflected in the table above, which include reserves of $10 million and $49 million as of December 31, 2014 and 2013, respectively, are individually evaluated for impairment. At both December 31, 2014 and 2013, we did not have any significant balances that are considered to be delinquent, on non-accrual status, past due 90 days or more, or considered to be impaired.

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

Revenue Recognition. As a result of our diverse product and service mix and customer base, we use multiple revenue recognition practices. We recognize sales for products and services in accordance with the provisions of Staff Accounting Bulletin (SAB) Topic 13, Revenue Recognition, as applicable. Products and services included within the scope of this SAB Topic include heating, ventilating, air-conditioning and refrigeration systems, non-complex alarm and fire detection and suppression systems, commercially funded research and development contracts and non-complex aerospace components. Sales within the scope of this SAB Topic are recognized when persuasive evidence of an arrangement exists, product delivery has occurred or services have been rendered, pricing is fixed or determinable and collectability is reasonably assured. Subsequent changes in service contracts are accounted for prospectively.

Contract Accounting and Separately Priced Maintenance and Extended Warranty Aftermarket Contracts: For our construction-type and certain production-type contracts, sales are recognized on a percentage-of-completion basis following contract accounting methods. Contracts consist of enforceable agreements which form the basis of our unit of accounting for measuring sales, accumulating costs and recording loss provisions as necessary. Contract accounting requires estimates of award fees and other sources of variable consideration as well as future costs over the performance period of the contract. Cost estimates also include the estimated cost of satisfying our offset obligations required under certain contracts. Cost estimates are subject to change and result in adjustments to margins on contracts in progress. The extent of progress toward completion on our long-term commercial aerospace equipment and production-type helicopter contracts is measured using units of delivery or other contractual milestones. The extent of progress towards completion on our development and other cost reimbursement contracts in our aerospace businesses and elevator and escalator sales, installation, modernization and other construction contracts in our commercial businesses is measured using cost-to-cost based input measures. Contract costs include estimated inventoriable manufacturing, engineering, product warranty and product performance guarantee costs, as appropriate.

For separately priced product maintenance and extended warranty aftermarket contracts, sales are recognized over the contract period. In the commercial businesses, sales are primarily recognized on a straight-line basis. In the aerospace businesses, sales are primarily recognized in proportion to cost as sufficient historical evidence indicates that costs of performing services under the contract are incurred on an other than straight-line basis.

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

We review our cost estimates on significant contracts on a quarterly basis, and for others, no less frequently than annually or when circumstances change and warrant a modification to a previous estimate. We record changes in contract estimates using the cumulative catch-up method in accordance with the Revenue Recognition Topic of the FASB ASC. Operating profits included significant net unfavorable changes in aerospace contract estimates of approximately $240 million in 2014 driven by the $438 million unfavorable impact of a revision in estimate on the CH-148 Canadian Maritime Helicopter program, partially offset by several net favorable contract adjustments recorded throughout the year, largely at the Pratt & Whitney segment. See Note 6 for further discussion of the CH-148 Canadian Maritime Helicopter program.

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

Cash Payments to Customers: UTC Climate, Controls & Security customarily offers its customers incentives to purchase products to ensure an adequate supply of its products in the distribution channels. The principal incentive program provides reimbursements to distributors for offering promotional pricing for our products. We account for incentive payments made as a reduction in sales. In our aerospace businesses, we may make participation payments to certain customers to secure certain contract rights. We classify the subsequent amortization of these acquired intangible assets from our customers as a reduction in sales. Contractually stated prices in arrangements with our customers that include the acquisition of intangible rights within the scope of the Intangibles - Goodwill and Other Topic of the FASB ASC and deliverables within the scope of the Revenue Recognition Topic of the FASB ASC are not presumed to be representative of fair value for determining the amounts to allocate to each element of an arrangement.

Research and Development. Research and development costs not specifically covered by contracts and those related to the company sponsored share of research and development activity in connection with cost-sharing arrangements are charged to expense as incurred. Government research and development support, not associated with specific contracts, is recorded as a reduction to research and development expense in the period earned. Repayment, if any, is in the form of future royalties and is conditioned upon the achievement of certain financial targets including specific aircraft engine sales, total aircraft engine sales volume and total year-over-year sales growth of the entity receiving the government funding. Given the conditional and uncertain nature of any repayment obligations, royalty expense is typically recorded only upon engine shipment or is otherwise accrued monthly based upon the forecasted impact for the current year. The cumulative funding received under existing relationships has been approximately $2.2 billion of which approximately $600 million has been repaid to date in the form of royalties.

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

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

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

Derivatives used for hedging purposes may be designated and effective as a hedge of the identified risk exposure at the inception of the contract. All derivative instruments are recorded on the balance sheet at fair value. Derivatives used to hedge foreign-currency-denominated balance sheet items are reported directly in earnings along with offsetting transaction gains and losses on the items being hedged. Derivatives used to hedge forecasted cash flows associated with foreign currency commitments or forecasted commodity purchases may be accounted for as cash flow hedges, as deemed appropriate. Gains and losses on derivatives designated as cash flow hedges are recorded in other comprehensive income and reclassified to earnings as a component of product sales or expenses, as applicable, when the hedged transaction occurs. To the extent that a previously designated hedging transaction is no longer an effective hedge, any ineffectiveness measured in the hedging relationship is recorded currently in earnings in the period it occurs.

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

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

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

Product Performance Obligations. We extend performance and operating cost guarantees beyond our normal service and warranty policies for extended periods on some of our products, particularly commercial aircraft engines. Liability under such guarantees is based upon future product performance and durability. We accrue for such costs that are probable and can be reasonably estimated. In addition, we incur discretionary costs to service our products in connection with product performance issues. The costs associated with these product performance and operating cost guarantees require estimates over the full terms of the agreements, and require management to consider factors such as the extent of future maintenance requirements and the future cost of material and labor to perform the services. These cost estimates are largely based upon historical experience. See Note 16 for further discussion.

Collaborative Arrangements. In view of the risks and costs associated with developing new engines, Pratt & Whitney has entered into certain collaboration arrangements in which sales, costs and risks are shared. Sales generated from engine programs, spare parts, and aftermarket business under collaboration arrangements are recorded as earned in our financial statements. Amounts attributable to our collaborators for their share of sales are recorded as an expense in our financial statements based upon the terms and nature of the arrangement. Costs associated with engine programs under collaborative arrangements are expensed as incurred. Under these arrangements, collaborators contribute their program share of engine parts, incur their own production costs and make certain payments to Pratt & Whitney for shared or joint program costs. The reimbursement of the collaborators' share of program costs is recorded as a reduction of the related expense item at that time. As of December 31, 2014, the collaborators' interests in all commercial engine programs ranged from 14% to 49%, inclusive of a portion of Pratt & Whitney's interests held by other participants. Pratt & Whitney is the principal participant in all existing collaborative arrangements. There are no individually significant collaborative arrangements and none of the collaborators exceed a 31% share in an individual program. The following table illustrates the income statement classification and amounts attributable to transactions arising from the collaborative arrangements between participants for each period presented:

(dollars in millions)

2014

2013

2012

Collaborator share of sales:

Cost of products sold

1,778

1,820

1,295

Cost of services sold

354

273

216

Collaborator share of program costs (reimbursement of expenses incurred):

Cost of products sold

(103

)

(127

)

(97

)

Research and development

(122

)

(194

)

(203

)

Selling, general and administrative

)

Business_Acquisitions_Disposit

Business Acquisitions, Dispositions, Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2014
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Note 2: Business Acquisitions, Dispositions, Goodwill and Intangible Assets	BUSINESS ACQUISITIONS, DISPOSITIONS, GOODWILL AND INTANGIBLE ASSETS
	Business Acquisitions and Dispositions. Our investments in businesses in 2014, 2013 and 2012 totaled $530 million (including debt assumed of $128 million), $151 million and $18.6 billion (including debt assumed of $2.6 billion), respectively. Our investments in businesses in 2014 consisted of the acquisition of the majority interest in a Pratt & Whitney joint venture and a number of small acquisitions, primarily in our commercial businesses.
	In 2013, we completed the sale of the Pratt & Whitney Power Systems business to Mitsubishi Heavy Industries (MHI) for $432 million, excluding contingent consideration valued at approximately $200 million, and we entered into a long-term engineering and manufacturing agreement with MHI, generating a pre-tax gain of approximately $193 million ($132 million after tax). We also 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. 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.
	In 2012, we issued approximately $10.9 billion of long-term debt and equity units and completed the acquisition of Goodrich, for 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 UTC Aerospace Systems segment. In connection with the Goodrich acquisition, we recorded approximately $11.6 billion of goodwill and $10.1 billion of identifiable intangible assets, including approximately $8.6 billion of customer relationship and related program assets. We recorded assumed liabilities of approximately $2.2 billion related to customer contractual obligations on certain OEM development programs where the expected costs exceeded the expected revenue under contract. These liabilities are being liquidated in accordance with the underlying economic pattern of obligations, as reflected by the net cash outflows incurred on the OEM contracts. Total consumption of the contractual obligations was approximately $249 million and $278 million in 2014 and 2013, respectively. Expected consumption of the contractual obligations is as follows: $229 million in 2015, $240 million in 2016, $259 million in 2017, $209 million in 2018, $192 million in 2019 and $480 million thereafter.
	In connection with regulatory approval of the Goodrich acquisition, regulatory authorities required UTC to dispose of the Goodrich electric power systems and the Goodrich pumps and engine controls businesses. We completed the sales of these businesses in 2013.
	In 2012, UTC 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 Goodrich acquisition. See Note 3 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 International Aero Engines AG (IAE) collaboration, completed a restructuring of their interests in IAE. As a result of the this transaction, 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 with Pratt & Whitney its primary beneficiary, and IAE has, therefore, been consolidated. The carrying amounts and classification of assets and liabilities for IAE in our Consolidated Balance Sheet as of December 31, 2014 and 2013 are as follows:


	(dollars in millions)	2014			2013
	Current assets	$	1,820		$	1,616

	Noncurrent assets	756			1,066

	Total assets	$	2,576		$	2,682

	Current liabilities	$	1,795		$	1,895

	Noncurrent liabilities	1,227			1,085

	Total liabilities	$	3,022		$	2,980

	UTC Climate, Controls & Security continued its portfolio transformation efforts in 2014 with the disposition of a number of businesses, resulting in a net gain of approximately $30 million, primarily due to a gain on the sale of an interest in a joint venture in North America. UTC Climate, Controls & Security's portfolio transformation in 2013 included the disposition of a number of businesses, resulting in a net gain of approximately $55 million, including gains from the sale of businesses in Hong Kong and Australia, and in 2012 included the disposition of a number of businesses resulting in impairment and other charges totaling approximately $180 million. During 2012, UTC Climate, Controls & Security also sold a controlling interest in a manufacturing and distribution joint venture in Asia generating a gain of approximately $215 million, and a controlling interest in a Canadian distribution business generating a gain of approximately $120 million.
	Goodwill. The changes in the carrying amount of goodwill, by segment, in 2014 are as follows:


	(dollars in millions)	Balance as of			Goodwill				Foreign				Balance as of
		January 1,			resulting from				currency				December 31,
		2014			business				translation				2014
					combinations				and other
	Otis	$	1,741		$	35			$	(112	)		$	1,664

	UTC Climate, Controls & Security	9,727			13				(332		)		9,408

	Pratt & Whitney	1,273			208				—				1,481

	UTC Aerospace Systems	15,069			—				(177		)		14,892

	Sikorsky	353			—				(6		)		347

	Total Segments	28,163			256				(627		)		27,792

	Eliminations and other	5			—				(1		)		4

	Total	$	28,168		$	256			$	(628	)		$	27,796

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


		2014							2013
	(dollars in millions)	Gross			Accumulated				Gross				Accumulated
		Amount			Amortization				Amount				Amortization
	Amortized:
	Service portfolios	$	2,103		$	(1,309	)		$	2,234			$	(1,295	)

	Patents and trademarks	361			(190		)		380				(181		)

	IAE collaboration	2,872			(20		)		2,273				—

	Customer relationships and other	12,189			(2,623		)		12,049				(2,199		)

		17,525			(4,142		)		16,936				(3,675		)

	Unamortized:
Trademarks and other	2,177			—				2,260				—

Total	$	19,702		$	(4,142	)		$	19,196			$	(3,675	)

Customer relationship intangible assets include payments made to our customers to secure certain contractual rights. We amortize these intangible assets based on the underlying pattern of economic benefit, which may result in an amortization method other than straight-line. We classify amortization of such payments as a reduction of sales. Amortization of intangible assets was $718 million, $710 million and $547 million in 2014, 2013 and 2012, respectively. The IAE collaboration intangible asset is amortized based upon the economic pattern of benefits as represented by the underlying cash flows. Prior to 2014, these cash flows were negative, and, accordingly, no amortization had previously been recorded. The following is the expected amortization of intangible assets for 2015 through 2019, which reflects an increase in expected amortization expense due to the pattern of economic benefit on certain aerospace intangible assets increasing over time:


(dollars in millions)	2015			2016				2017				2018				2019

Amortization expense	$	707		$	715			$	764			$	828			$	806

Discontinued_Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [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. Cash generated from these divestitures was used to repay debt incurred to finance the Goodrich acquisition in 2012. On February 12, 2013, we completed the disposition of UTC Power to ClearEdge Power, and have no continuing involvement with the UTC Power business post-disposition.
	On December 13, 2012, we completed the sale of the legacy Hamilton Sundstrand Industrial businesses. On August 7, 2012, we completed the disposition of Clipper Windpower (Clipper) and have no continuing involvement with the Clipper business following disposition.
	The legacy Hamilton Sundstrand Industrial businesses, as well as 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 Consolidated Statements of Operations and Cash Flows.
	The following summarized financial information for our discontinued operations businesses has been segregated from continuing operations and reported as Discontinued Operations in 2013. There was no discontinued operations activity in 2014.


	(dollars in millions)	2013
	Discontinued Operations:
	Net sales	$	309

	Income from operations	$	63

	Income tax expense	(32		)
	Income from operations, net of income taxes	31

	Loss on disposal	(33		)
	Income tax benefit	37

	Net income from discontinued operations	$	35

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share	EARNINGS PER SHARE


	(dollars in millions, except per share amounts; shares in millions)	2014		2013		2012
	Net income attributable to common shareowners:
	Net income from continuing operations	$	6,220	$	5,686	$	4,847

	Net income from discontinued operations	—		35		283

	Net income attributable to common shareowners	$	6,220	$	5,721	$	5,130

	Basic weighted average number of shares outstanding	898.3		901		895.2

	Stock awards	13.3		14.1		11.4

	Diluted weighted average number of shares outstanding	911.6		915.1		906.6

	Earnings Per Share of Common Stock—Basic:
	Net income from continuing operations	$	6.92	$	6.31	$	5.41

	Net income from discontinued operations	—		0.04		0.32

	Net income attributable to common shareowners	6.92		6.35		5.73

	Earnings Per Share of Common Stock—Diluted:
	Net income from continuing operations	$	6.82	$	6.21	$	5.35

	Net income from discontinued operations	—		0.04		0.31

	Net income attributable to common shareowners	6.82		6.25		5.66

	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 have been anti-dilutive. For 2014 and 2012, there were 3.5 million and 4.7 million anti-dilutive stock awards excluded from the computation, respectively. For 2013, there were no anti-dilutive stock awards excluded from the computation.

Commercial_Aerospace_Industry_

Commercial Aerospace Industry Assets and Commitments	12 Months Ended
	Dec. 31, 2014
Other Commitments [Abstract]
Commercial Aerospace Industry Assets and Commitments	NOTE 5: COMMERCIAL AEROSPACE INDUSTRY ASSETS AND COMMITMENTS
	We have receivables and other financing assets with commercial aerospace industry customers totaling $5,573 million and $6,193 million at December 31, 2014 and 2013, respectively. These include customer financing assets related to commercial aerospace industry customers, consisting of products under lease of $583 million and $662 million, and notes and leases receivable of $424 million and $586 million, at December 31, 2014 and 2013, respectively.
	Aircraft financing commitments, in the form of debt, guarantees or lease financing, are provided to commercial aerospace customers. The extent to which the financing commitments will be utilized is not currently known, since customers may be able to obtain more favorable terms from other financing sources. We may also arrange for third-party investors to assume a portion of these commitments. If financing commitments are exercised, debt financing is generally secured by assets with fair market values equal to or exceeding the financed amounts consistent with market terms and conditions. We may also lease aircraft and subsequently sublease the aircraft to customers under long-term non-cancelable operating leases. Lastly, we have made residual value and other guarantees related to various commercial aerospace customer financing arrangements. The estimated fair market values of the guaranteed assets equal or exceed the value of the related guarantees, net of existing reserves.
	We also have other contractual commitments, including commitments to secure certain contractual rights to provide product on new aircraft platforms, which are included in "Other commercial aerospace commitments" in the table below. Payments made on these contractual commitments are included in intangible assets and are amortized over the term of underlying economic benefit. Our commercial aerospace financing and other contractual commitments as of December 31, 2014 were approximately $11.3 billion. We have entered into certain collaboration arrangements, which may include participation by our collaboration partners in these commitments.
	The following is the expected maturity of commercial aerospace industry assets and commitments as of December 31, 2014:


	(dollars in millions)	Committed			2015			2016			2017			2018			2019			Thereafter
	Notes and leases receivable	$	424		$	43		$	103		$	42		$	26		$	25		$	185

	Commercial aerospace financing commitments	$	3,152		$	574		$	489		$	363		$	449		$	375		$	902

	Other commercial aerospace commitments	8,165			763			858			948			899			774			3,923

	Collaboration partners' share	(2,840		)	(370		)	(381		)	(383		)	(380		)	(296		)	(1,030		)
	Total commercial commitments	$	8,477		$	967		$	966		$	928		$	968		$	853		$	3,795

	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 contingent upon each hour flown by the V2500-powered aircraft in service as of June 29, 2012 during the fifteen-year period following closing of the purchase. These payments are being capitalized as a collaboration intangible asset and amortized based upon the economic pattern of benefits of the V2500 program as represented by the underlying cash flows. Prior to 2014, these cash flows were negative, and, accordingly, no amortization had previously been recorded. The flight hour payments are included in Other commercial aerospace commitments in the table above.
	Our financing commitments with customers are contingent upon maintenance of certain levels of financial condition by the customers. In addition, we have residual value and other guarantees of $632 million as of December 31, 2014.
	We have long-term aftermarket maintenance contracts with commercial aerospace industry customers for which revenue is recognized in proportion to actual costs incurred relative to total expected costs to be incurred over the respective contract periods. Billings, however, are typically based on factors such as engine flight hours. The timing differences between the billings and the maintenance costs incurred generates both unbilled receivables and deferred revenues. Unbilled receivables under these long-term aftermarket contracts totaled $823 million and $677 million at December 31, 2014 and 2013, respectively, and are included in Accounts receivable and Other assets in the accompanying Consolidated Balance Sheet. Deferred revenues totaled $3,553 million and $3,230 million at December 31, 2014 and 2013, respectively, and are included in Accrued liabilities and Other long-term liabilities in the accompanying Consolidated Balance Sheet.
	Reserves related to aerospace receivables and financing assets were $243 million at both December 31, 2014 and 2013, respectively. Reserves related to financing commitments and guarantees were $67 million and $76 million at December 31, 2014 and 2013, respectively.

Inventories_and_Contracts_in_P

Inventories and Contracts in Progress	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventories and Contracts in Progress	INVENTORIES & CONTRACTS IN PROGRESS


	(dollars in millions)	2014			2013
	Raw materials	$	2,056		$	1,983

	Work-in-process	3,596			4,600

	Finished goods	3,776			3,360

	Contracts in progress	8,189			7,929

		17,617			17,872

	Less:
	Progress payments, secured by lien, on U.S. Government contracts	(300		)	(279		)
	Billings on contracts in progress	(7,452		)	(7,263		)
		$	9,865		$	10,330

	Raw materials, work-in-process and finished goods are net of valuation reserves of $863 million and $1,025 million as of December 31, 2014 and 2013, respectively. Contracts in progress principally relate to elevator and escalator contracts and include costs of manufactured components, accumulated installation costs and estimated earnings on incomplete contracts.
	During the quarter ended June 30, 2014, Sikorsky and the Canadian Government signed amendments to their existing contracts for development, production and support of the CH-148 helicopter. These amendments included significant changes in program scope, governance and delivery methodology. Accordingly, in the second quarter of 2014 we recognized a change in estimate on this program resulting in the liquidation of approximately $1.3 billion of inventory, including all capitalized contract development costs related to this program. As of December 31, 2013, inventory included approximately $740 million of capitalized contract development costs related to this program.
	Inventory also includes capitalized contract development costs related to certain aerospace programs at UTC Aerospace Systems. As of December 31, 2014 and 2013, these capitalized costs were $141 million and $159 million, respectively, which will be liquidated as production units are delivered to the customer.
	Our sales contracts in many cases are long-term contracts expected to be performed over periods exceeding twelve months. At December 31, 2014 and 2013, approximately 69% of total inventories and contracts in progress have been acquired or manufactured under such long-term contracts, a portion of which is not scheduled for delivery within the next twelve months.

Fixed_Assets

Fixed Assets	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Fixed Assets	FIXED ASSETS


	(dollars in millions)	Estimated	2014			2013
		Useful Lives
	Land		$	408		$	434

	Buildings and improvements	12-40 years	5,697			5,633

	Machinery, tools and equipment	3-20 years	12,375			11,353

	Other, including assets under construction		1,284			1,241

			19,764			18,661

	Accumulated depreciation		(10,488		)	(9,795		)

			$	9,276		$	8,866

	Depreciation expense was $1,122 million in 2014, $1,050 million in 2013 and $920 million in 2012.

Accrued_Liabilities

Accrued Liabilities	12 Months Ended
	Dec. 31, 2014
Accrued Liabilities [Abstract]
Accrued Liabilities	ACCRUED LIABILITIES


	(dollars in millions)	2014		2013
	Advances on sales contracts and service billings	$	5,262	$	6,444

	Accrued salaries, wages and employee benefits	1,909		1,901

	Service and warranty accruals	533		505

	Litigation and contract matters	505		526

	Interest payable	503		481

	Income taxes payable	309		540

	Accrued property, sales and use taxes	285		280

	Accrued workers compensation	275		218

	Accrued restructuring costs	264		337

	Other	4,161		4,103

		$	14,006	$	15,335

	The decline in Advances on sales contracts and service billings as of December 31, 2014, as compared with December 31, 2013, is largely attributable to the change in estimate on contract amendments signed by Sikorsky and the Canadian Government for the development, production and support for the CH-148 helicopter. This change in estimate resulted in the liquidation of customer advances of approximately $700 million. See Note 6 for further discussion of these amendments.

Borrowings_and_Lines_of_Credit

Borrowings and Lines of Credit	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Borrowings and Lines of Credit	BORROWINGS AND LINES OF CREDIT


	(dollars in millions)	2014			2013
	Short-term borrowings:
	Commercial paper	$	—		$	200

	Other borrowings	126			188

	Total short-term borrowings	$	126		$	388

	At December 31, 2014, we had revolving credit agreements with various banks permitting aggregate borrowings of up to $4.35 billion pursuant to a $2.20 billion revolving credit agreement and a $2.15 billion multicurrency revolving credit agreement, both of which expire in May, 2019. As of December 31, 2014, 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 December 31, 2014, our maximum commercial paper borrowing limit was $4.35 billion. We use our commercial paper borrowings for general corporate purposes, including the funding of potential acquisitions and repurchases of our common stock.
	The weighted-average interest rates applicable to short-term borrowings outstanding at December 31, 2014 and 2013 were 5.7% and 1.8%, respectively. At December 31, 2014, approximately $816 million was available under short-term lines of credit with local banks at our various domestic and international subsidiaries.
	On April 1, 2014, we redeemed all remaining outstanding 2016 Goodrich 6.290% notes, representing approximately $188 million in aggregate principal, under our redemption notice issued on February 28, 2014.
	During 2013, we repaid approximately $1,698 million of Goodrich and UTC notes bearing interest ranging from 1.200% to 6.290%, with original maturity dates ranging from 2015 to 2021, under previously disclosed redemptions and tender offers. During 2013, a combined net extinguishment loss of approximately $23 million was recognized within Interest expense, net in the accompanying Consolidated Statements of Operations.
	Long-term debt consisted of the following as of December 31:


	(dollars in millions)	2014			2013
	LIBOR § plus 0.500% floating rate notes due 2015	$	500		$	500

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

	6.290% notes due 2016‡	—			188

	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*	1,250			1,250

	8.875% notes due 2019	271			271

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

	4.875% notes due 2020‡	171			171

	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	147			86

Other (including capitalized leases)‡	378			394

Total principal long-term debt	19,500			19,643

Other (fair market value adjustments and discounts)‡	168			210

Total long-term debt	19,668			19,853

Less: current portion	1,796			112

Long-term debt, net of current portion	$	17,872		$	19,741


*	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 December 31, 2014 was approximately 0.2%.
The project financing obligations noted above are associated with the sale of rights to unbilled revenues related to the ongoing activity of an entity owned by UTC Climate, Controls & Security. The percentage of total short-term borrowings and long-term debt at variable interest rates was 4% and 5% at December 31, 2014 and 2013, respectively. Interest rates on our commercial paper borrowings are considered variable due to their short-term duration and high-frequency of turnover.
The schedule of principal payments required on long-term debt for the next five years and thereafter is:


(dollars in millions)
2015	$	1,796

2016	110

2017	2,518

2018	118

2019	1,570

Thereafter	13,388

Total	$	19,500

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

Equity

Equity	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Equity	EQUITY
	A summary of the changes in each component of accumulated other comprehensive (loss) income, net of tax for the years ended December 31, 2014 and 2013 is provided below:


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

	Other comprehensive (loss) income before reclassifications, net	(509		)	2,409			208			(100		)	2,008

	Amounts reclassified, pre-tax	25			906			(91		)	23			863

	Tax (benefit) expense reclassified	—			(332		)	34			(5		)	(303		)

	Balance at December 31, 2013	$	170		$	(3,267	)	$	296		$	(79	)	$	(2,880	)

	Other comprehensive (loss) income before reclassifications, net	(1,228		)	(2,708		)	28			(205		)	(4,113		)

	Amounts reclassified, pre-tax	7			416			(20		)	96			499

	Tax (benefit) expense reclassified	—			(150		)	4			(21		)	(167		)

	Balance at December 31, 2014	$	(1,051	)	$	(5,709	)	$	308		$	(209	)	$	(6,661	)

	Amounts reclassified related to our defined benefit pension and postretirement plans include amortization of prior service costs and transition obligations, and actuarial net losses recognized during each period presented. These costs are recorded as components of net periodic pension cost for each period presented (see Note 12 for additional details).
	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 pro-forma effect on Net income attributable to common shareowners had they been recorded through net income is provided below:


	(dollars in millions)	2014			2013			2012
	Net income attributable to common shareowners	$	6,220		$	5,721		$	5,130

	Transfers to noncontrolling interests:
	Increase in common stock for sale of subsidiary shares	4			—			—

	Decrease in common stock for purchase of subsidiary shares	(75		)	(49		)	(34		)
	Net income attributable to common shareowners after transfers to noncontrolling interests	$	6,149		$	5,672		$	5,096

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Notes to Consolidated Financial Statements [Abstract]
Income Taxes	INCOME TAXES
	Income Before Income Taxes. The sources of income from continuing operations before income taxes are:


	(dollars in millions)	2014				2013				2012
	United States	$	4,270			$	3,658			$	2,595

	Foreign	4,617				4,654				4,316

		$	8,887			$	8,312			$	6,911

	With few exceptions, U.S. income taxes have not been provided on undistributed earnings of UTC's international subsidiaries. These earnings relate to ongoing operations and were approximately $28 billion as of December 31, 2014. It is not practicable to estimate the amount of tax that might be payable. We intend to reinvest these earnings permanently outside the U.S. or to repatriate the earnings only when it is tax effective to do so.
	Provision for Income Taxes. The income tax expense (benefit) for the years ended December 31, 2014, 2013 and 2012 consisted of the following components:


	(dollars in millions)	2014				2013				2012
	Current:
	United States:
	Federal	$	349			$	616			$	403

	State	47				55				9

	Foreign	1,492				1,325				1,179

		1,888				1,996				1,591

	Future:
	United States:
	Federal	408				262				335

	State	(39		)		36				111

	Foreign	7				(56		)		(326		)

		376				242				120

	Income tax expense	$	2,264			$	2,238			$	1,711

	Attributable to items credited (charged) to equity and goodwill	$	1,535			$	(1,661	)		$	297

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


		2014			2013			2012
	Statutory U.S. federal income tax rate	35	%		35	%		35	%
	Tax on international activities	(3.4	)%		(5.8	)%		(6.4	)%
	Tax audit settlements	(4.2	)%		(0.4	)%		(3.4	)%
	Other	(1.9	)%		(1.9	)%		(0.4	)%
	Effective income tax rate	25.5	%		26.9	%		24.8	%
	The 2014 effective tax rate reflects a favorable tax adjustment of $213 million related to the conclusion of the examination of UTC’s 2009 - 2010 tax years, a favorable tax adjustment of $84 million related to the resolution of disputed tax matters with the Appeals Division of the IRS for UTC’s 2006 - 2008 tax years, a favorable tax impact of $40 million related to the conclusion of the State of Connecticut's review of UTC’s 2010 - 2012 tax years and a favorable tax impact of $34 million related to the conclusion of the Canada Revenue Agency’s examination of the company's research credits claimed in 2006-2012. Also included is a favorable tax adjustment of $175 million associated with management’s decision to repatriate additional high taxed dividends from the current year. These are partially offset by an unfavorable tax adjustment of approximately $265 million related to the 1998 reorganization of the corporate structure of Otis operations in Germany, a matter which is currently in litigation. This is reported in the table above in tax on international activities.
	The 2013 effective tax rate reflects a favorable non-cash income tax adjustment of approximately $35 million related to the conclusion of the examination of Goodrich's 2009 - 2010 tax years and resolution of a dispute with the IRS for Goodrich's 2001 - 2006 tax years. In addition, the 2013 effective tax rate also reflects a favorable tax impact of $95 million associated with the legislative corporate tax extenders enacted in January 2013, as part of the American Taxpayer Relief Act of 2012, as well as the favorable tax impact of $24 million related to a U.K. tax rate reduction enacted in July 2013.
	The 2012 effective tax rate reflects a favorable non-cash income tax adjustment of approximately $203 million related to the conclusion of the IRS's examination of UTC's 2006 – 2008 tax years, as well as a reduction in tax expense of $34 million related to the favorable resolution of disputed tax matters with the Appeals Division of the IRS for the tax years 2004 – 2005. The favorable income tax impact of $225 million related to the release of non-U.S. valuation allowances resulting from internal legal entity reorganizations is also included in the 2012 effective rate. This is reported in the table above in tax on international activities.
	Deferred Tax Assets and Liabilities. Future income taxes represent the tax effects of transactions which are reported in different periods for tax and financial reporting purposes. These amounts consist of the tax effects of temporary differences between the tax and financial reporting balance sheets and tax carryforwards. Current and non-current future income tax benefits and payables within the same tax jurisdiction are generally offset for presentation in the Consolidated Balance Sheet.
	The tax effects of net temporary differences and tax carryforwards which gave rise to future income tax benefits and payables at December 31, 2014 and 2013 are as follows:


	(dollars in millions)	2014				2013
	Future income tax benefits:
	Insurance and employee benefits	$	1,122			$	747

	Other asset basis differences	369				365

	Other liability basis differences	1,039				1,187

Tax loss carryforwards	418				386

Tax credit carryforwards	905				1,184

Valuation allowances	(428		)		(669		)
	$	3,425			$	3,200

Future income taxes payable:
Insurance and employee benefits	$	(1,911	)		$	(992	)
Other asset basis differences	4,584				4,649

Other items, net	(124		)		(178		)
Tax loss carryforwards	(242		)		(346		)
Tax credit carryforwards	(58		)		(68		)
Valuation allowances	184				273

	$	2,433			$	3,338

The future income taxes payable balances of $2,433 million and $3,338 million, reflected in the table above, for the years ended December 31, 2014 and 2013, respectively, are reported in accrued liabilities and other long-term liabilities on our Consolidated Balance Sheet.
Valuation allowances have been established primarily for tax credit carryforwards, tax loss carryforwards, and certain foreign temporary differences to reduce the future income tax benefits to expected realizable amounts. The table above reflects reductions in 2014 to tax credit carryforwards and valuation allowances associated with an agreement with a state taxing authority for the monetization of tax credits.
Tax Credit and Loss Carryforwards. At December 31, 2014, tax credit carryforwards, principally state and foreign, and tax loss carryforwards, principally state and foreign, were as follows:


(dollars in millions)	Tax Credit				Tax Loss
	Carryforwards				Carryforwards
Expiration period:
2015-2019	$	29			$	555

2020-2024	10				242

2025-2034	243				726

Indefinite	681				2,118

Total	$	963			$	3,641

Unrecognized Tax Benefits. At December 31, 2014, we had gross tax-effected unrecognized tax benefits of $1,089 million, of which, $1,002 million, if recognized, would impact the effective tax rate. A reconciliation of the beginning and ending amounts of unrecognized tax benefits and interest expense related to unrecognized tax benefits for the years ended December 31, 2014, 2013 and 2012 is as follows:


(dollars in millions)	2014				2013				2012
Balance at January 1	$	1,223			$	1,073			$	946

Additions for tax positions related to the current year	164				113				232

Additions for tax positions of prior years	435				211				221

Reductions for tax positions of prior years	(47		)		(41		)		(21		)
Settlements	(686		)		(133		)		(305		)
Balance at December 31	$	1,089			$	1,223			$	1,073

Gross interest expense related to unrecognized tax benefits	$	180			$	51			$	40

Total accrued interest balance at December 31	$	292			$	262			$	270

Included in the balance at December 31, 2014 is $87 million of tax positions whose tax characterization is highly certain but for which there is uncertainty about the timing of tax return inclusion. Because of the impact of deferred tax accounting, other than interest and penalties, the timing would not impact the annual effective tax rate but could accelerate the payment of cash to the taxing authority to an earlier period.
We conduct business globally and, as a result, UTC or one or more of our subsidiaries files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business we are subject to examination by taxing authorities throughout the world, including such major jurisdictions as Australia, Belgium, Brazil, Canada, China, France, Germany, Hong Kong, India, Italy, Japan, Singapore, South Korea, 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 2003.
During the quarter ended December 31, 2014, the Company resolved certain litigation and Internal Revenue Service (IRS) Appeals proceedings related to an issue involving the proper timing of deductions taken by Goodrich Corporation in its tax years 2005 through 2010, prior to its acquisition by UTC. As a result, the Company recognized non-cash gains of approximately $93 million during the fourth quarter of 2014, primarily comprised of pre-tax interest.
During the quarter ended September 30, 2014, IRS Appeals proceedings for UTC tax years 2006 through 2008 were completed. Additionally, during the quarter ended September 30, 2014, an agreement was reached between the Company and the Canada Revenue Agency (CRA) with respect to the amount of the research credits to which the Company was entitled for tax years 2006 through 2012. As a result of the completed IRS Appeals activity and agreement with the CRA, the Company recognized predominantly non-cash gains of approximately $141 million, including a pre-tax interest adjustment of $23 million. Additionally, during the third quarter of 2014, the IRS commenced audits of UTC tax years 2011 and 2012 as well as pre-acquisition Goodrich tax years 2011 and 2012 through the date of acquisition by UTC, both of which are expected to continue beyond the next twelve months.
During the quarter ended June 30, 2014, the Examination Division of the IRS completed a review of UTC tax years 2009 and 2010 and the Examination Division of the Connecticut Department of Revenue Services completed a review of UTC’s tax years 2010 through 2012. As a result of the completion of these examinations, the Company recognized predominantly non-cash gains of approximately $274 million, including a pre-tax interest adjustment of $21 million. The Company also reached an agreement with a state taxing authority during the second quarter of 2014 for the monetization of tax credits resulting in a gain of approximately $220 million through Other income, net in the quarter ended June 30, 2014. Additionally, a dispute related to a proposed disallowance of certain deductions claimed in France for tax years 2008 through 2011 was settled with the French Tax Authority during the quarter ended June 30, 2014 consistent with reserves that had been established for the matter.
During 2013, the Company recognized a predominantly non-cash settlement gain of approximately $34 million for interest relating to the closure of IRS audits of UTC through 2005. During 2013, the IRS also completed examination activity of Goodrich tax years 2009 and 2010, prior to its acquisition by UTC, resulting in a non-cash settlement gain of approximately $24 million, including $2 million of interest. Additionally, certain litigation regarding the proper timing of deductions taken by Goodrich in its tax years 2001 and 2002, prior to its acquisition by UTC, was resolved in 2013 resulting in recognition of a non-cash settlement gain of approximately $25 million, including $12 million of interest.
During 2012, the IRS completed examination fieldwork for our 2006 through 2008 tax years and issued its audit report. During 2012, we also reached final resolution with the Appeals Division of the IRS for our 2004 and 2005 tax years regarding certain proposed adjustments with which we did not agree. As a result of the above described events with respect to our 2004 - 2005 and 2006 - 2008 tax years, we recorded reductions in tax expense in 2012 in the aggregate amount of $237 million.
It is reasonably possible that over the next 12 months the amount of unrecognized tax benefits may change within a range of a net increase of $95 million to a net decrease of $445 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.
See Note 17, Contingent Liabilities, for discussion regarding uncertain tax positions, included in the above range, related to pending litigation with respect to certain deductions claimed in Germany.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2014
Employee Benefits and Share-based Compensation [Abstract]
Employee Benefit Plans	EMPLOYEE BENEFIT PLANS
	We sponsor numerous domestic and foreign employee benefit plans, which are discussed below.
	Employee Savings Plans. We sponsor various employee savings plans. Our contributions to employer sponsored defined contribution plans were $330 million, $335 million and $256 million for 2014, 2013 and 2012, respectively.
	Our non-union domestic employee savings plan uses an Employee Stock Ownership Plan (ESOP) for employer matching contributions. External borrowings were used by the ESOP to fund a portion of its purchase of ESOP stock from us. The external borrowings have been extinguished and only re-amortized loans remain between UTC and the ESOP Trust. As ESOP debt service payments are made, common stock is released from an unreleased shares account. ESOP debt may be prepaid or re-amortized to either increase or decrease the number of shares released so that the value of released shares equals the value of plan benefit. We may also, at our option, contribute additional common stock or cash to the ESOP.
	Shares of common stock are allocated to employees' ESOP accounts at fair value on the date earned. Cash dividends on common stock held by the ESOP are used for debt service payments. Participants receive additional shares in lieu of cash dividends. Common stock allocated to ESOP participants is included in the average number of common shares outstanding for both basic and diluted earnings per share. At December 31, 2014, 29.9 million common shares had been allocated to employees, leaving 14.2 million unallocated common shares in the ESOP Trust, with an approximate fair value of $1.6 billion.
	Pension Plans. We sponsor both funded and unfunded domestic and foreign defined benefit pension plans that cover a large number of our employees. Our plans use a December 31 measurement date consistent with our fiscal year.


	(dollars in millions)	2014				2013
	Change in Benefit Obligation:
	Beginning balance	$	33,026			$	35,708
	Beginning balance	$	33,026			$	35,708
	Service cost	487				569
	Service cost	487				569
	Interest cost	1,517				1,373
	Interest cost	1,517				1,373
	Actuarial loss (gain)	5,277				(3,027		)
	Actuarial loss (gain)	5,277				(3,027		)
	Total benefits paid	(1,939		)		(1,601		)
	Net settlement and curtailment gain	(1		)		(53		)
	Plan amendments	5				224
	Plan amendments	5				224
	Other	(519		)		(167		)
	Ending balance	$	37,853			$	33,026
	Ending balance	$	37,853			$	33,026

	Change in Plan Assets:
	Beginning balance	$	31,355			$	29,928
	Beginning balance	$	31,355			$	29,928
	Actual return on plan assets	3,140				3,019
	Actual return on plan assets	3,140				3,019
	Employer contributions	615				236
	Employer contributions	615				236
	Benefits paid from plan assets	(1,939		)		(1,601		)
	Other	(433		)		(227		)
	Ending balance	$	32,738			$	31,355
	Ending balance	$	32,738			$	31,355

	Funded Status:
	Fair value of plan assets	$	32,738			$	31,355
	Fair value of plan assets	$	32,738			$	31,355
	Benefit obligations	(37,853		)		(33,026		)
	Funded status of plan	$	(5,115	)		$	(1,671	)

	Amounts Recognized in the Consolidated Balance Sheet Consist of:
	Noncurrent assets	$	681			$	768
	Noncurrent assets	$	681			$	768
	Current liability	(104		)		(74		)
	Noncurrent liability	(5,692		)		(2,365		)
	Net amount recognized	$	(5,115	)		$	(1,671	)

	Amounts Recognized in Accumulated Other Comprehensive Loss Consist of:
	Net actuarial loss	$	9,068			$	5,261
	Net actuarial loss	$	9,068			$	5,261
	Prior service credit	(27		)		(37		)
	Net amount recognized	$	9,041			$	5,224
	Net amount recognized	$	9,041			$	5,224

	Included within "Actuarial loss (gain)" in the Change in Benefit Obligation in 2014 above, is a $1.1 billion increase to the projected benefit obligation resulting from the adoption of the new mortality base table (RP-2014) with projection scale (MP-2014) that was published by the Society of Actuaries in 2014. The amounts included in "Other" in the preceding table primarily reflect the impact of foreign exchange translation, primarily for plans in the U.K. and Canada.
	In 2014, we offered a voluntary lump-sum pension payout program to certain eligible terminated vested participants (generally any terminated vested participant with a lump sum value of $50,000 or less) that would settle our obligation to those participants accepting the offer. The program provides participants with a one-time choice of electing to receive a lump-sum settlement in lieu of receiving a future monthly pension benefit. Payments to participants who accepted the offer began in 2014 and will be completed in early 2015. In 2014, as part of this voluntary lump sum program, the Company settled $311 million of its projected benefit obligation, and expects to settle approximately another $147 million in early 2015.
	Qualified domestic pension plan benefits comprise approximately 75% of the projected benefit obligation. Benefits for union employees are generally based on a stated amount for each year of service. For non-union employees, benefits are generally based on an employee's years of service and compensation near retirement. Effective January 1, 2015, this formula will change to the existing cash balance formula that was adopted in 2003 for newly hired non-union employees and for other non-union employees who made a one-time voluntary election to have future benefit accruals determined under this formula. This plan change resulted in a $623 million reduction in the projected benefit obligation as of December 31, 2009 and an additional $204 million reduction in the projected benefit obligation as of July 26, 2012 when applied to legacy Goodrich salaried employees. Certain foreign plans, which comprise approximately 23% of the projected benefit obligation, are considered defined benefit plans for accounting purposes. Nonqualified domestic pension plans provide supplementary retirement benefits to certain employees and are not a material component of the projected benefit obligation.
	We made $200 million of cash contributions to our domestic defined benefit pension plans and made $317 million of cash contributions to our foreign defined benefit pension plans in 2014. In 2013, we made no significant contributions to our domestic defined benefit pension plans and made $108 million of cash contributions to our foreign defined benefit pension plans.
	Information for pension plans with accumulated benefit obligations in excess of plan assets:


(dollars in millions)	2014				2013
Projected benefit obligation	$	34,261			$	22,142
Projected benefit obligation	$	34,261			$	22,142
Accumulated benefit obligation	33,495				21,475
Accumulated benefit obligation	33,495				21,475
Fair value of plan assets	28,478				19,884
Fair value of plan assets	28,478				19,884
The accumulated benefit obligation for all defined benefit pension plans was $36.9 billion and $31.9 billion at December 31, 2014 and 2013, respectively.
The components of the net periodic pension cost are as follows:


(dollars in millions)	2014				2013				2012
Pension Benefits:
Service cost	$	487			$	569			$	500
Service cost	$	487			$	569			$	500
Interest cost	1,517				1,373				1,331
Interest cost	1,517				1,373				1,331
Expected return on plan assets	(2,215		)		(2,107		)		(1,944		)
Amortization of prior service credit	(8		)		(34		)		(24		)
Amortization of unrecognized net transition obligation	—				—				1
Amortization of unrecognized net transition obligation	—				—				1
Recognized actuarial net loss	429				954				722
Recognized actuarial net loss	429				954				722
Net settlement and curtailment loss	13				1				77
Net settlement and curtailment loss	13				1				77
Net periodic pension cost - employer	$	223			$	756			$	663
Net periodic pension cost - employer	$	223			$	756			$	663
Net settlements and curtailment losses for pension benefits includes curtailment gains of approximately $24 million related to, and recorded in, discontinued operations for the year ended December 31, 2013.
Other changes in plan assets and benefit obligations recognized in other comprehensive loss in 2014 are as follows:


(dollars in millions)
Current year actuarial loss	$	4,353
Current year actuarial loss	$	4,353
Amortization of actuarial loss	(429		)
Current year prior service cost	5
Current year prior service cost	5
Amortization of prior service credit	8
Amortization of prior service credit	8
Other	(120		)
Total recognized in other comprehensive loss	$	3,817
Total recognized in other comprehensive loss	$	3,817
Net recognized in net periodic pension cost and other comprehensive loss	$	4,040
	$	4,040
The estimated amount that will be amortized from accumulated other comprehensive loss into net periodic pension cost in 2015 is as follows:


(dollars in millions)
Net actuarial loss	$	888
Net actuarial loss	$	888
Prior service credit	(13		)
	$	875
	$	875
Major assumptions used in determining the benefit obligation and net cost for pension plans are presented in the following table as weighted-averages:


		Benefit Obligation						Net Cost
		2014			2013			2014			2013			2012
Discount rate		3.8	%		4.7	%		4.7	%		4	%		4.6	%
Salary scale		4.2	%		4.2	%		4.2	%		4.2	%		4.3	%
Expected return on plan assets		—			—			7.6	%		7.7	%		7.7	%
Expected return on plan assets		—			—			7.6	%		7.7	%		7.7	%
In determining the expected return on plan assets, we consider the relative weighting of plan assets, the historical performance of total plan assets and individual asset classes, and economic and other indicators of future performance. In addition, we may consult with and consider the opinions of financial and other professionals in developing appropriate capital market assumptions. Return projections are also validated using a simulation model that incorporates yield curves, credit spreads and risk premiums to project long-term prospective returns.
The plans' investment management objectives include maintaining an adequate level of diversification, reducing interest rate and market risk, and providing adequate liquidity to meet immediate and future benefit payment requirements. Globally, investment strategies target a mix of 55% to 65% of growth seeking assets and 35% to 45% income generating and hedging assets using a wide diversification of asset types, fund strategies and investment managers. The growth seeking allocation consists of global public equities in developed and emerging countries, private equity, real estate and balanced market risk strategies. Within public equities, approximately 10% of the total investment portfolio is an enhanced equity strategy that invests in publicly traded equity and fixed income securities, derivatives and foreign currency. Investments in private equity are primarily via limited partnership interests in buy-out strategies with smaller allocations to distressed debt funds. The real estate strategy is principally concentrated in directly held U.S. core investments with some smaller investments in international, value-added and opportunistic strategies. Within the income generating assets, the fixed income portfolio consists of mainly government and broadly diversified high quality corporate bonds.
The plans have continued their pension risk management techniques designed to reduce the plan's interest rate risk. More specifically, the plans have incorporated liability hedging programs that include the adoption of a risk reduction objective as part of the long-term investment strategy. Under this objective the interest rate hedge is dynamically increased as funded status improves. The hedging programs incorporate a range of assets and investment tools, each with ranging interest rate sensitivity. The investment portfolios are currently hedging approximately 35% to 45% of the interest rate sensitivity of the pension plan liabilities.
The fair values of pension plan assets at December 31, 2014 and 2013 by asset category are as follows:


(dollars in millions)	Quoted Prices in				Significant				Significant				Total
	Active Markets				Observable Inputs				Unobservable Inputs
	For Identical Assets				(Level 2)				(Level 3)
	(Level 1)
Asset Category:
Public Equities
Global Equities	$	6,569			$	2			$	—			$	6,571
Global Equities	$	6,569			$	2			$	—			$	6,571
Global Equity Commingled Funds 1	—				5,431				—				5,431
Global Equity Commingled Funds 1	—				5,431				—				5,431
Enhanced Global Equities 2	292				2,191				525				3,008
Enhanced Global Equities 2	292				2,191				525				3,008
Private Equities 3	—				—				1,400				1,400
Private Equities 3	—				—				1,400				1,400
Fixed Income Securities
Fixed Income Securities
Governments	509				1,132				—				1,641
Governments	509				1,132				—				1,641
Corporate Bonds	4				9,190				309				9,503
Corporate Bonds	4				9,190				309				9,503
Structured Products 4	—				124				—				124
Structured Products 4	—				124				—				124
Real Estate 5	—				12				1,913				1,925
Real Estate 5	—				12				1,913				1,925
Other 6	—				2,244				—				2,244
Other 6	—				2,244				—				2,244
Cash & Cash Equivalents 7	201				247				—				448
Cash & Cash Equivalents 7	201				247				—				448
Subtotal	$	7,575			$	20,573			$	4,147			32,295
Subtotal	$	7,575			$	20,573			$	4,147			32,295
Other Assets & Liabilities 8													443
Other Assets & Liabilities 8													443
Total at December 31, 2014													$	32,738
Total at December 31, 2014													$	32,738
Public Equities
Global Equities	$	6,840			$	1			$	—			$	6,841
Global Equities	$	6,840			$	1			$	—			$	6,841
Global Equity Commingled Funds 1	—				4,881				—				4,881
Global Equity Commingled Funds 1	—				4,881				—				4,881
Enhanced Global Equities 2	261				2,241				500				3,002
Enhanced Global Equities 2	261				2,241				500				3,002
Private Equities 3	—				—				1,339				1,339
Private Equities 3	—				—				1,339				1,339
Fixed Income Securities
Fixed Income Securities
Governments	424				1,307				—				1,731
Governments	424				1,307				—				1,731
Corporate Bonds	—				8,461				296				8,757
Corporate Bonds	—				8,461				296				8,757
Structured Products 4	—				80				—				80
Structured Products 4	—				80				—				80
Real Estate 5	—				13				1,800				1,813
Real Estate 5	—				13				1,800				1,813
Other 6	—				2,110				—				2,110
Other 6	—				2,110				—				2,110
Cash & Cash Equivalents 7	2				207				—				209
Cash & Cash Equivalents 7	2				207				—				209
Subtotal	$	7,527			$	19,301			$	3,935			30,763
Subtotal	$	7,527			$	19,301			$	3,935			30,763
Other Assets & Liabilities 8													592
Other Assets & Liabilities 8													592
Total at December 31, 2013													$	31,355
Total at December 31, 2013													$	31,355

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

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

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

Note 4	Represents mortgage and asset-backed securities.

Note 5	Represents investments in real estate including commingled funds and directly held properties.

Note 6	Represents insurance contracts and global balanced risk commingled funds consisting mainly of equity, bonds and some commodities.

Note 7	Represents short-term commercial paper, bonds and other cash or cash-like instruments.

Note 8	Represents trust receivables and payables that are not leveled.
Derivatives in the plan are primarily used to manage risk and gain asset class exposure while still maintaining liquidity. Derivative instruments mainly consist of equity futures, interest rate futures, interest rate swaps and currency forward contracts.
Our common stock represents approximately 3% of total plan assets at December 31, 2014 and 2013. We review our assets at least quarterly to ensure we are within the targeted asset allocation ranges and, if necessary, asset balances are adjusted back within target allocations. We employ a broadly diversified investment manager structure that includes diversification by active and passive management, style, capitalization, country, sector, industry and number of investment managers.
The fair value measurement of plan assets using significant unobservable inputs (Level 3) changed due to the following:


(dollars in millions)	Enhanced				Private				Corporate				Real				Total
	Global				Equities				Bonds				Estate
	Equities
Balance, December 31, 2012	$	447			$	1,202			$	276			$	1,785			$	3,710
Balance, December 31, 2012	$	447			$	1,202			$	276			$	1,785			$	3,710
Realized gains	—				195				—				20				215
Realized gains	—				195				—				20				215
Unrealized gains (losses) relating to instruments still held in the reporting period	50				(9		)		2				102				145
	50				(9		)		2				102				145
Purchases, sales, and settlements, net	3				(49		)		18				(107		)		(135		)
Purchases, sales, and settlements, net	3				(49		)		18				(107		)		(135		)
Balance, December 31, 2013	500				1,339				296				1,800				3,935
Balance, December 31, 2013	500				1,339				296				1,800				3,935
Realized gains	35				257				—				11				303
Realized gains	35				257				—				11				303
Unrealized (losses) gains relating to instruments still held in the reporting period	(23		)		(23		)		1				79				34
	(23		)		(23		)		1				79				34
Purchases, sales, and settlements, net	13				(173		)		12				23				(125		)
Purchases, sales, and settlements, net	13				(173		)		12				23				(125		)
Balance, December 31, 2014	$	525			$	1,400			$	309			$	1,913			$	4,147
Balance, December 31, 2014	$	525			$	1,400			$	309			$	1,913			$	4,147
Quoted market prices are used to value investments when available. Investments in securities traded on exchanges, including listed futures and options, are valued at the last reported sale prices on the last business day of the year or, if not available, the last reported bid prices. Fixed income securities are primarily measured using a market approach pricing methodology, where observable prices are obtained by market transactions involving identical or comparable securities of issuers with similar credit ratings. Mortgages have been valued on the basis of their future principal and interest payments discounted at prevailing interest rates for similar investments. Investment contracts are valued at fair value by discounting the related cash flows based on current yields of similar instruments with comparable durations. Real estate investments are valued on a quarterly basis using discounted cash flow models which consider long-term lease estimates, future rental receipts and estimated residual values. Valuation estimates are supplemented by third-party appraisals on an annual basis.
Private equity limited partnerships are valued quarterly using discounted cash flows, earnings multiples and market multiples. Valuation adjustments reflect changes in operating results, financial condition, or prospects of the applicable portfolio company. Over-the-counter securities and government obligations are valued at the bid prices or the average of the bid and ask prices on the last business day of the year from published sources or, if not available, from other sources considered reliable, generally broker quotes. Temporary cash investments are stated at cost, which approximates fair value.
ESTIMATED FUTURE CONTRIBUTIONS AND BENEFIT PAYMENTS
Although we are not required to make additional contributions to our domestic defined benefit pension plans through the end of 2019, we may elect to make discretionary contributions in 2015. We expect to make total contributions of approximately $350 million to our global defined benefit pension plans in 2015, including discretionary contributions of approximately $200 million to our domestic defined benefit pension plans. Contributions do not reflect benefits to be paid directly from corporate assets.
Benefit payments, including amounts to be paid from corporate assets, and reflecting expected future service, as appropriate, are expected to be paid as follows: $1,994 million in 2015, $1,824 million in 2016, $1,895 million in 2017, $1,975 million in 2018, $2,040 million in 2019, and $11,091 million from 2020 through 2024.
Postretirement Benefit Plans. We sponsor a number of postretirement benefit plans that provide health and life benefits to eligible retirees. Such benefits are provided primarily from domestic plans, which comprise approximately 88% of the benefit obligation. The postretirement plans are unfunded.


(dollars in millions)	2014				2013
Change in Benefit Obligation:
Beginning balance	$	987			$	1,106
Beginning balance	$	987			$	1,106
Service cost	3				3
Service cost	3				3
Interest cost	41				38
Interest cost	41				38
Actuarial loss (gain)	7				(62		)
Actuarial loss (gain)	7				(62		)
Total benefits paid	(107		)		(119		)
Other	21				21
Other	21				21
Ending balance	$	952			$	987
Ending balance	$	952			$	987

Change in Plan Assets:
Beginning balance	$	—			$	—
Beginning balance	$	—			$	—
Employer contributions	85				95
Employer contributions	85				95
Benefits paid from plan assets	(107		)		(119		)
Other	22				24
Other	22				24
Ending balance	$	—			$	—
Ending balance	$	—			$	—

Funded Status:
Fair value of plan assets	$	—			$	—
Fair value of plan assets	$	—			$	—
Benefit obligations	(952		)		(987		)
Funded status of plan	$	(952	)		$	(987	)

Amounts Recognized in the Consolidated Balance Sheet Consist of:
Current liability	$	(89	)		$	(86	)
Noncurrent liability	(863		)		(901		)
Net amount recognized	$	(952	)		$	(987	)

Amounts Recognized in Accumulated Other Comprehensive Loss Consist of:
Net actuarial gain	$	(113	)		$	(124	)
Prior service cost (credit)	1				(1		)
Prior service cost (credit)	1				(1		)
Net amount recognized	$	(112	)		$	(125	)
We modified the postretirement medical benefits provided to legacy Goodrich salaried employees by eliminating any company subsidy for retirements that occur after January 31, 2014. This resulted in a $16 million reduction in the projected benefit obligation as of July 26, 2012.
The components of net periodic benefit cost are as follows:


(dollars in millions)	2014				2013				2012
Other Postretirement Benefits:
Service cost	$	3			$	3			$	3
Service cost	$	3			$	3			$	3
Interest cost	41				38				37
Interest cost	41				38				37
Amortization of prior service credit	(1		)		(10		)		(4		)
Recognized actuarial net gain	(4		)		(4		)		(6		)
Net settlement and curtailment gain	—				—				(2		)
Net settlement and curtailment gain	—				—				(2		)
Net periodic other postretirement benefit cost	$	39			$	27			$	28
Net periodic other postretirement benefit cost	$	39			$	27			$	28
Other changes in plan assets and benefit obligations recognized in other comprehensive loss in 2014 are as follows:


(dollars in millions)
Current year actuarial loss	$	9
Current year actuarial loss	$	9
Amortization of prior service credit	1
Amortization of prior service credit	1
Amortization of actuarial net gain	4
Amortization of actuarial net gain	4
Other	(1		)
Total recognized in other comprehensive loss	$	13
Total recognized in other comprehensive loss	$	13
Net recognized in net periodic other postretirement benefit cost and other comprehensive loss	$	52
	$	52
The estimated amounts that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in 2015 include actuarial net gains of $4 million.
Major assumptions used in determining the benefit obligation and net cost for postretirement plans are presented in the following table as weighted-averages:


	Benefit Obligation						Net Cost
	2014			2013			2014			2013			2012
Discount rate	3.8	%		4.4	%		4.4	%		3.6	%		4.2	%
Assumed health care cost trend rates are as follows:


	2014			2013
Health care cost trend rate assumed for next year	7	%		7.5	%
Rate that the cost trend rate gradually declines to	5	%		5	%
Year that the rate reaches the rate it is assumed to remain at	2019			2019
	2019			2019
Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. A one-percentage-point change in assumed health care cost trend rates would have the following effects:


	2014 One-Percentage-Point
(dollars in millions)	Increase				Decrease
(dollars in millions)	Increase				Decrease
Effect on total service and interest cost	$	3			$	(3	)
Effect on total service and interest cost	$	3			$	(3	)
Effect on postretirement benefit obligation	54				(46		)
Effect on postretirement benefit obligation	54				(46		)
ESTIMATED FUTURE BENEFIT PAYMENTS
Benefit payments, including net amounts to be paid from corporate assets and reflecting expected future service, as appropriate, are expected to be paid as follows: $89 million in 2015, $86 million in 2016, $81 million in 2017, $75 million in 2018, $69 million in 2019, and $281 million from 2020 through 2024.
Multiemployer Benefit Plans. We contribute to various domestic and foreign multiemployer defined benefit pension plans. The risks of participating in these multiemployer plans are different from single-employer plans in that assets contributed are pooled and may be used to provide benefits to employees of other participating employers. If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers. Lastly, if we choose to stop participating in some of our multiemployer plans, we may be required to pay those plans a withdrawal liability based on the underfunded status of the plan.
Our participation in these plans for the annual periods ended December 31 is outlined in the table below. Unless otherwise noted, the most recent Pension Protection Act (PPA) zone status available in 2014 and 2013 is for the plan's year-end at June 30, 2013, and June 30, 2012, respectively. The zone status is based on information that we received from the plan and is certified by the plan's actuary. Our significant plan is in the green zone which represents at least 80% funded and does not require a financial improvement plan (FIP) or a rehabilitation plan (RP).


(dollars in millions)				Pension				FIP/		Contributions
				Protection Act				RP Status
				Zone Status
Pension Fund		EIN/Pension		2014		2013		Pending/		2014				2013				2012			Surcharge		Expiration Date of
		Plan Number						Implemented													Imposed		Collective-Bargaining
																							Agreement
National Elevator Industry Pension Plan		23-2694291		Green		Green		No		$	79			$	71			$	63		No		8-Jul-17
National Elevator Industry Pension Plan		23-2694291		Green		Green		No		$	79			$	71			$	63		No		8-Jul-17
Other funds										34				34				36
Other funds										34				34				36
										$	113			$	105			$	99
										$	113			$	105			$	99
For the plan years ended June 30, 2013 and 2012, respectively, we were listed in the National Elevator Industry Pension Plan's Forms 5500 as providing more than 5% of the total contributions for the plan. At the date these financial statements were issued, Forms 5500 were not available for the plan year ending June 30, 2014.
In addition, we participate in several multiemployer arrangements that provide postretirement benefits other than pensions, with the National Elevator Industry Health Benefit Plan being the most significant. These arrangements generally provide medical and life benefits for eligible active employees and retirees and their dependents. Contributions to multiemployer plans that provide postretirement benefits other than pensions were $14 million, $12 million and $11 million for 2014, 2013 and 2012, respectively.
Stock-based Compensation. UTC's long-term incentive plan authorizes various types of market and performance based incentive awards that may be granted to officers and employees. Our Long-Term Incentive Plan (LTIP) was amended and restated effective April 28, 2014. Since the LTIP's inception in 2005, a total of 149 million shares have been authorized for issuance pursuant to awards under the LTIP. All equity-based compensation awards are made exclusively through the LTIP. As of December 31, 2014, approximately 53 million shares remain available for awards under the LTIP. The LTIP does not contain an aggregate annual award limit. We expect that the shares awarded on an annual basis will range from 1.0% to 1.5% of shares outstanding. The LTIP will expire after all shares have been awarded or April 30, 2020, whichever is sooner.
Under the LTIP and predecessor long-term incentive plans, the exercise price of awards is set on the grant date and may not be less than the fair market value per share on that date. Generally, stock appreciation rights and stock options have a term of ten years and a minimum three-year vesting period. In the event of retirement, awards held for more than one year may become vested and exercisable subject to certain terms and conditions. LTIP awards with performance-based vesting generally have a minimum three-year vesting period and vest based on performance against pre-established metrics. In the event of retirement, vesting for awards held more than one year does not accelerate but may vest as scheduled based on actual performance relative to target metrics. We have historically repurchased shares of our common stock in an amount at least equal to the number of shares issued under our equity compensation arrangements and will continue to evaluate this policy in conjunction with our overall share repurchase program.
We measure the cost of all share-based payments, including stock options, at fair value on the grant date and recognize this cost in the Consolidated Statement of Operations. For the years ended December 31, 2014, 2013 and 2012, $240 million, $275 million and $210 million, respectively, of compensation cost was recognized in operating results. The associated future income tax benefit recognized was $80 million, $97 million and $76 million for the years ended December 31, 2014, 2013 and 2012, respectively.
For the years ended December 31, 2014, 2013 and 2012, the amount of cash received from the exercise of stock options was $187 million, $378 million and $381 million, respectively, with an associated tax benefit realized of $125 million, $194 million and $111 million, respectively. In addition, for the years ended December 31, 2014, 2013 and 2012, the associated tax benefit realized from the vesting of performance share units and other restricted awards was $49 million, $26 million and $15 million, respectively. Also, in accordance with the Compensation—Stock Compensation Topic of the FASB ASC, for the years ended December 31, 2014, 2013 and 2012, $103 million, $115 million and $67 million, respectively, of certain tax benefits have been reported as operating cash outflows with corresponding cash inflows from financing activities.
At December 31, 2014, there was $182 million of total unrecognized compensation cost related to non-vested equity awards granted under long-term incentive plans. This cost is expected to be recognized ratably over a weighted-average period of 1.9 years.
A summary of the transactions under all long-term incentive plans for the year ended December 31, 2014 follows:


	Stock Options							Stock Appreciation Rights							Performance Share Units						Other
	Stock Options							Stock Appreciation Rights							Performance Share Units						Incentive
(shares and units in thousands)	Shares			Average				Shares			Average				Units			Average			Shares/Units
(shares and units in thousands)	Shares			Price*				Shares			Price*				Units			Price**
Outstanding at:
December 31, 2013	6,239			$	57.88			38,215			$	72.33			2,701			$	78.77		1,478
December 31, 2013	6,239			$	57.88			38,215			$	72.33			2,701			$	78.77		1,478
Granted	194			112.54				4,516			112.47				688			112.49			387
Granted	194			112.54				4,516			112.47				688			112.49			387
Ancillary***	—			—				—			—				292			79			—
Ancillary***	—			—				—			—				292			79			—
Exercised/earned	(3,846	)		51.57				(3,941	)		66.54				(1,095	)		79			(324	)
Exercised/earned	(3,846	)		51.57				(3,941	)		66.54				(1,095	)		79			(324	)
Cancelled	(299	)		52.91				(386	)		89.16				(54	)		88.09			(46	)
Cancelled	(299	)		52.91				(386	)		89.16				(54	)		88.09			(46	)
December 31, 2014	2,288			$	73.76			38,404			$	77.48			2,532			$	87.65		1,495
December 31, 2014	2,288			$	73.76			38,404			$	77.48			2,532			$	87.65		1,495

*	weighted-average exercise price

**	weighted-average grant stock price

***	ancillary shares granted based on actual performance achieved on the 2011 award
The weighted-average grant date fair value of stock options and stock appreciation rights granted during 2014, 2013, and 2012 was $28.36, $19.91 and $19.32, respectively. The weighted-average grant date fair value of performance share units, which vest upon achieving certain performance metrics, granted during 2014, 2013, and 2012 was $125.41, $91.71 and $82.15, respectively. The total fair value of awards vested during the years ended December 31, 2014, 2013 and 2012 was $226 million, $219 million and $187 million, respectively. The total intrinsic value (which is the amount by which the stock price exceeded the exercise price on the date of exercise) of stock options and stock appreciation rights exercised during the years ended December 31, 2014, 2013 and 2012 was $425 million, $608 million and $370 million, respectively. The total intrinsic value (which is the stock price at vesting) of performance share units and other restricted awards vested was $154 million, $75 million and $46 million during the years ended December 31, 2014, 2013 and 2012, respectively.
The following table summarizes information about equity awards outstanding that are vested and expected to vest and equity awards outstanding that are exercisable at December 31, 2014:


		Equity Awards Vested and Expected to Vest														Equity Awards That Are Exercisable
(shares in thousands; aggregate intrinsic value in millions)		Awards			Average				Aggregate				Remaining			Awards			Average			Aggregate		Remaining
					Price*				Intrinsic				Term**						Price*			Intrinsic		Term**
									Value													Value
Stock Options/Stock Appreciation Rights		40,553			$	76.56			$	1,559			5.6			24,763			$	68.13		$	1,161	4
Stock Options/Stock Appreciation Rights		40,553			$	76.56			$	1,559			5.6			24,763			$	68.13		$	1,161	4
Performance Share Units/Restricted Stock		3,230			—				371				1.1
Performance Share Units/Restricted Stock		3,230			—				371				1.1

*	weighted-average exercise price per share

**	weighted-average contractual remaining term in years
The fair value of each option award is estimated on the date of grant using a binomial lattice model. The following table indicates the assumptions used in estimating fair value for the years ended December 31, 2014, 2013 and 2012. Lattice-based option models incorporate ranges of assumptions for inputs, those ranges are as follows:


		2014			2013			2012
Expected volatility		22% - 26%			26% - 27%			30% - 35%
Expected volatility		22% - 26%			26% - 27%			30% - 35%
Weighted-average volatility		26	%		27	%		30	%
Expected term (in years)		7.6 - 8.0			7.3 - 7.6			7.4 - 7.7
Expected term (in years)		7.6 - 8.0			7.3 - 7.6			7.4 - 7.7
Expected dividends		2.2	%		2.6	%		2.3	%
Risk-free rate		0.0% - 3.1%			0.1% - 1.9%			0.0% - 2.0%
Risk-free rate		0.0% - 3.1%			0.1% - 1.9%			0.0% - 2.0%
Expected volatilities are based on the returns of our stock, including implied volatilities from traded options on our stock for the binomial lattice model. We use historical data to estimate equity award exercise and employee termination behavior within the valuation model. Separate employee groups and equity award characteristics are considered separately for valuation purposes. The expected term represents an estimate of the period of time equity awards are expected to remain outstanding. The risk-free rate is based on the term structure of interest rates at the time of equity award grant.

Restructuring_and_Other_Costs

Restructuring and Other Costs	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Restructuring and Other Costs	RESTRUCTURING COSTS
	During 2014, we recorded net pre-tax restructuring costs totaling $368 million for new and ongoing restructuring actions. We recorded charges in the segments as follows:


	(dollars in millions)
	Otis	$	87

	UTC Climate, Controls & Security	116

	Pratt & Whitney	64

	UTC Aerospace Systems	82

	Sikorsky	14

	Eliminations and other	5

	Total	$	368

	Restructuring charges incurred in 2014 primarily relate to actions initiated during 2014 and 2013, and were recorded as follows:


	(dollars in millions)
	Cost of sales	$	183

	Selling, general and administrative	185

	Total	$	368

	2014 Actions. During 2014, we initiated restructuring actions relating to ongoing cost reduction efforts, including workforce reductions and consolidation of field operations. We recorded net pre-tax restructuring costs totaling $345 million for restructuring actions initiated in 2014, consisting of $155 million in cost of sales and $190 million in selling, general and administrative expenses.
	We are targeting to complete in 2015 the majority of the remaining workforce and all facility related cost reduction actions initiated in 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 2014 restructuring actions:


	(dollars in millions)	Severance				Asset Write-Downs				Facility Exit, Lease Termination & Other Costs				Total
	Net pre-tax restructuring costs	$	275			$	8			$	62			$	345

	Utilization and foreign exchange	(113		)		(8		)		(53		)		(174		)
	Balance at December 31, 2014	$	162			$	—			$	9			$	171

	The following table summarizes expected, incurred and remaining costs for the 2014 restructuring actions by segment:


	(dollars in millions)	Expected Costs				Cost Incurred During 2014				Remaining Costs at December 31, 2014
	Otis	$	137			$	(98	)		$	39

	UTC Climate, Controls & Security	122				(86		)		36

	Pratt & Whitney	84				(64		)		20

	UTC Aerospace Systems	115				(72		)		43

	Sikorsky	20				(20		)		—

	Eliminations and other	5				(5		)		—

	Total	$	483			$	(345	)		$	138

	2013 Actions. During 2014, we recorded net pre-tax restructuring costs totaling $29 million for restructuring actions initiated in 2013, consisting of $30 million in cost of sales offset by a reduction of $1 million in selling, general and administrative expenses. The 2013 actions relate to ongoing cost reduction efforts, including workforce reductions and the consolidation of field operations. The following table summarizes the accrual balances and utilization by cost type for the 2013 restructuring actions:


	(dollars in millions)	Severance				Asset				Facility Exit,				Total
						Write-				Lease
						Downs				Termination
										and Other
						Costs
Restructuring accruals at January 1, 2014			$	196			$	—			$	19			$	215

Net pre-tax restructuring costs	9				1				19				29

Utilization and foreign exchange	(137		)		(1		)		(21		)		(159		)
Balance at December 31, 2014	$	68			$	—			$	17			$	85

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


(dollars in millions)	Expected				Costs				Costs				Remaining
	Costs				Incurred				Incurred				Costs at
					During				During				December 31,
					2013				2014				2014
Otis	$	69			$	(69	)		$	—			$	—

UTC Climate, Controls & Security	121				(89		)		(25		)		7

Pratt & Whitney	162				(154		)		(5		)		3

UTC Aerospace Systems	86				(71		)		(7		)		8

Sikorsky	30				(38		)		8				—

Total	$	468			$	(421	)		$	(29	)		$	18

2012 Actions. During 2014, we reversed net pre-tax restructuring accruals totaling $6 million for restructuring actions initiated in 2012. As of December 31, 2014, there are no remaining costs to complete the 2012 actions.

Financial_Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [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.
	The four quarter rolling average of the notional amount of foreign exchange contracts hedging foreign currency transactions was $13.9 billion and $12.3 billion at December 31, 2014 and 2013, respectively. Additional information pertaining to foreign exchange and hedging activities is included in Note 1.
	The following table summarizes the fair value of derivative instruments as of December 31, 2014 and 2013 which consist solely of foreign exchange contracts:


		Asset Derivatives						Liability Derivatives
	(dollars in millions)	2014			2013			2014		2013
	Derivatives designated as hedging instruments	$	3		$	59		$	248	$	103

	Derivatives not designated as hedging instruments	139			31			71		54

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


		Year Ended December 31,
	(dollars in millions)	2014			2013
	Loss recorded in Accumulated other comprehensive loss	$	(263	)	$	(136	)
	Loss reclassified from Accumulated other comprehensive loss into Product sales (effective portion)	$	96		$	25

	Assuming current market conditions continue, a $121 million pre-tax loss is expected to be reclassified from Accumulated other comprehensive loss into Product sales to reflect the fixed prices obtained from foreign exchange hedging within the next 12 months. At December 31, 2014, all derivative contracts accounted for as cash flow hedges mature by January 2017.
	We recognized a gain of $51 million and $22 million in Other income, net on the Consolidated Statement of Operations from foreign exchange contracts not designated as hedging instruments in 2014 and 2013, respectively.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	FAIR VALUE MEASUREMENTS
	The Fair Value Measurements and Disclosures Topic of the FASB ASC establishes a valuation hierarchy for disclosure of the inputs to the valuations used to measure fair value. A financial asset or liability's classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. This hierarchy prioritizes the inputs into three broad levels as follows:

	▪	Level 1 - quoted prices in active markets for identical assets or liabilities;

	▪	Level 2 - inputs other than quoted prices included within Level 1 that are observable for the asset or liability either directly or indirectly;

	▪	Level 3 - unobservable inputs based on our own assumptions used to measure assets and liabilities at fair value.
	The following table provides the assets and liabilities carried at fair value measured on a recurring and nonrecurring basis as of December 31, 2014 and 2013:


	2014 *(dollars in millions)*	Total				Level 1				Level 2				Level 3

	Recurring fair value measurements:
	Available-for-sale securities	$	961			$	961			$	—			$	—

	Derivative assets	142				—				142				—

	Derivative liabilities	(319		)		—				(319		)		—

	Nonrecurring fair value measurements:
	Business dispositions	3				—				3				—



	2013 *(dollars in millions)*	Total				Level 1				Level 2				Level 3

	Recurring fair value measurements:
	Available-for-sale securities	$	988			$	988			$	—			$	—

	Derivative assets	90				—				90				—

	Derivative liabilities	(157		)		—				(157		)		—

	Nonrecurring fair value measurements:
	Business dispositions	66				—				66				—

	We have recorded net gains of approximately $23 million, including a $48 million gain during 2014, as a result of fair value adjustments related to the acquisition of the majority interest in a Pratt & Whitney joint venture. During 2014, we also recorded an approximately $30 million net gain from UTC Climate, Controls & Security's ongoing portfolio transformation, primarily due to a gain on the sale of an interest in a joint venture in North America, and a charge of approximately $28 million to adjust the fair value of a Sikorsky joint venture investment.
	During 2013, we recorded an approximately $55 million net gain from UTC Climate, Controls & Security's portfolio transformation, primarily due to a gain on the sale of businesses in Hong Kong and Australia. In addition, we recorded an approximately $193 million gain from the sale of Pratt & Whitney Power Systems business (see Note 2), as well as an approximately $25 million charge to adjust the fair value of a Pratt & Whitney joint venture investment.
	Valuation Techniques. Our available-for-sale securities include equity investments that are traded in active markets, either domestically or internationally and are measured at fair value using closing stock prices from active markets. Our derivative assets and liabilities include foreign exchange contracts 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. As of December 31, 2014, there were no significant transfers in and out of Level 1 and Level 2.
	As of December 31, 2014, 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 at December 31, 2014 and 2013:


		December 31, 2014								December 31, 2013
	(dollars in millions)	Carrying				Fair				Carrying				Fair
		Amount				Value				Amount				Value
	Long-term receivables	$	214			$	204			$	655			$	586

	Customer financing notes receivable	262				260				394				366

	Short-term borrowings	(126		)		(126		)		(388		)		(388		)
	Long-term debt (excluding capitalized leases)	(19,634		)		(22,254		)		(19,807		)		(21,525		)
	Long-term liabilities	(80		)		(74		)		(283		)		(253		)
	The following table provides the valuation hierarchy classification of assets and liabilities that are not carried at fair value in our Consolidated Balance Sheet as of December 31, 2014:


	(dollars in millions)	Total				Level 1				Level 2				Level 3

	Long-term receivables	$	204			$	—			$	204			$	—

	Customer financing notes receivable	260				—				260				—

	Short-term borrowings	(126		)		—				—				(126		)

Long-term debt (excluding capitalized leases)	(22,254		)		—				(21,883		)		(371		)

Long-term liabilities	(74		)		—				(74		)		—

Guarantees

Guarantees	12 Months Ended
	Dec. 31, 2014
Guarantees [Abstract]
Guarantees	GUARANTEES
	We extend a variety of financial guarantees to third parties. As of December 31, 2014 and 2013, the following financial guarantees were outstanding:


		December 31, 2014						December 31, 2013
	(dollars in millions)	Maximum			Carrying			Maximum		Carrying
		Potential			Amount of			Potential		Amount of
		Payment			Liability			Payment		Liability
	Commercial aerospace financing arrangements (see Note 5)	$	632		$	21		$	615	$	25

	Credit facilities and debt obligations—unconsolidated subsidiaries (expire 2015 to 2034)	211			15			231		6

	Performance guarantees	136			—			150		—

	As disclosed in Note 3, we completed the sale of substantially all operations of Rocketdyne to GenCorp Inc. on June 14, 2013. 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 $81 million, with no associated significant carrying amount of a liability as of December 31, 2014.
	We also have obligations arising from sales of certain businesses and assets, including those from representations and warranties and related indemnities for environmental, health and safety, tax and employment matters. The maximum potential payment related to these obligations is not a specified amount as a number of the obligations do not contain financial caps. The carrying amount of liabilities related to these obligations was $186 million and $189 million at December 31, 2014 and 2013, respectively. For additional information regarding the environmental indemnifications, see Note 17.
	We accrue for costs associated with guarantees when it is probable that a liability has been incurred and the amount can be reasonably estimated. The most likely cost to be incurred is accrued based on an evaluation of currently available facts, and where no amount within a range of estimates is more likely, the minimum is accrued. In accordance with the Guarantees Topic of the FASB ASC we record these liabilities at fair value.
	We provide service and warranty policies on our products and extend performance and operating cost guarantees beyond our normal service and warranty policies on some of our products, particularly commercial aircraft engines. In addition, we incur discretionary costs to service our products in connection with specific product performance issues. Liabilities for performance and operating cost guarantees are based upon future product performance and durability, and are largely estimated based upon historical experience. Adjustments are made to accruals as claim data and historical experience warrant. The changes in the carrying amount of service and product warranties and product performance guarantees for the years ended December 31, 2014 and 2013 are as follows:


		Year ended December 31,
	(dollars in millions)	2014			2013
	Balance as of January 1	$	1,360		$	1,332

	Warranties and performance guarantees issued	337			313

	Settlements made	(344		)	(287		)
	Other	(40		)	2

	Balance as of December 31	$	1,313		$	1,360

Contingent_Liabilities

Contingent Liabilities	12 Months Ended
Contingent Liabilities	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities	CONTINGENT LIABILITIES
	Except as otherwise noted, while we are unable to predict the final outcome, based on information currently available, we do not believe that resolution of any of the following matters will have a material adverse effect upon our competitive position, results of operations, cash flows or financial condition.
	Leases. We occupy space and use certain equipment under lease arrangements. Rental commitments of $2,525 million at December 31, 2014 under long-term non-cancelable operating leases are payable as follows: $593 million in 2015, $479 million in 2016, $340 million in 2017, $235 million in 2018, $171 million in 2019 and $707 million thereafter. Rent expense was $464 million in 2014, $456 million in 2013 and $457 million in 2012.
	Additional information pertaining to commercial aerospace rental commitments is included in Note 5 to the Consolidated Financial Statements.
	Environmental. Our operations are subject to environmental regulation by federal, state and local authorities in the United States and regulatory authorities with jurisdiction over our foreign operations. As described in Note 1 to the Consolidated Financial Statements, we have accrued for the costs of environmental remediation activities and periodically reassess these amounts. We believe that the likelihood of incurring losses materially in excess of amounts accrued is remote. As of December 31, 2014 and 2013, we had $903 million and $936 million reserved for environmental remediation, respectively. Additional information pertaining to environmental matters is included in Note 1 to the Consolidated Financial Statements.
	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, or that certain payments be delayed or withheld. Some of these audit reports involved substantial amounts. We have made voluntary refunds in those cases we believe appropriate, have settled some allegations and continue to litigate certain 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 accrued the minimum amount.
	Legal Proceedings.
	F100 Engine Litigation
	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 for the civil penalty 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. Oral argument in the appeal was held on December 2, 2014, and a decision from the Sixth Circuit is expected in early 2015. 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 reasonably 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.
	Cost Accounting Standards Claims
	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 $100 million (including interest through December 31, 2014). 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. DOD appealed this decision to the United States Court of Appeals for the Federal Circuit. On December 10, 2014, the Federal Circuit affirmed the judgment of the U.S. Court of Federal Claims in favor of Sikorsky.
	By letter dated December 24, 2013, a Divisional Administrative Contracting Officer of the United States Defense Contract Management Agency asserted a claim and demand for payment of $210,968,414 against Pratt & Whitney. The claim is based on Pratt & Whitney's alleged noncompliance with cost accounting standards from January 1, 2005 to December 31, 2012, due to its method of determining the cost of collaborator parts used in the calculation of material overhead costs for government contracts. On March 18, 2014, Pratt & Whitney filed an appeal to the Armed Services Board of Contract Appeals. Pratt & Whitney’s appeal is still pending and we continue to believe the government’s claim is without merit.
	German Tax Litigation
	As previously disclosed, UTC has been involved in administrative review proceedings with the German Tax Office, which concern approximately €215 million (approximately $265 million) of tax benefits that we have claimed related to a 1998 reorganization of the corporate structure of Otis operations in Germany. Upon audit, these tax benefits were disallowed by the German Tax Office. UTC estimates interest associated with the aforementioned tax benefits is an additional approximately €115 million (approximately $140 million). On August 3, 2012, we filed suit in the local German Tax Court (Berlin-Brandenburg). In 2008 the German Federal Tax Court (FTC) denied benefits to another taxpayer in a case involving a German tax law relevant to our reorganization. The determination of the FTC 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 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 FTC for further consideration of certain related issues. In May 2010, the FTC released its decision, in which it resolved certain tax issues that may be relevant to our suit and remanded the case to a lower court for further development. In 2012, the lower court decided in favor of the other taxpayer and the German Government again appealed the findings to the FTC. In November 2014, the FTC ruled in favor of the German Government, and against the other taxpayer. The FTC decision in the case involving the other taxpayer is not determinative of the outcome in our case and we will continue vigorously to litigate the matter. However, in light of the FTC decision in the case involving the other taxpayer, we have fully accrued for the matter during the quarter ended December 31, 2014.
	Other.
	As described in Note 16 to the Consolidated Financial Statements, we extend performance and operating cost guarantees beyond our normal warranty and service policies for extended periods on some of our products. We have accrued our estimate of the liability that may result under these guarantees and for service costs that are probable and can be reasonably estimated.
	We have accrued for environmental investigatory, remediation, operating and maintenance costs, performance guarantees and other litigation and claims based on our estimate of the probable outcome of these matters. While it is possible that the outcome of these matters may differ from the recorded liability, we believe that resolution of these matters will not have a material impact on our competitive position, results of operations, cash flows or financial condition.
	We also have other commitments and contingent liabilities related to legal proceedings, self-insurance programs and matters arising out of the normal course of business. We accrue contingencies based upon a range of possible outcomes. If no amount within this range is a better estimate than any other, then we accrue the minimum amount.
	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. We do not believe that these matters will have a material adverse effect upon our competitive position, results of operations, cash flows or financial condition.

Segment_Financial_Data

Segment Financial Data	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Financial Data	SEGMENT FINANCIAL DATA
	Our operations for the periods presented herein are classified into five principal segments. The segments are generally determined based on the management structure of the businesses and the grouping of similar operating companies, where each management organization has general operating autonomy over diversified products and services.
	Otis products include elevators, escalators, moving walkways and service sold to customers in the commercial and residential property industries around the world.
	UTC Climate, Controls & Security products and related services include HVAC and refrigeration systems, building controls and automation, fire and special hazard suppression systems and equipment, security monitoring and rapid response systems, provided to a diversified international customer base principally in the industrial, commercial and residential property and commercial transportation sectors.
	Pratt & Whitney products include commercial, military, business jet and general aviation aircraft engines, parts and services, industrial gas generators, sold to a diversified customer base, including international and domestic commercial airlines and aircraft leasing companies, aircraft manufacturers, and U.S. and foreign governments. Pratt & Whitney also provides product support and a full range of overhaul, repair and fleet management services.
	UTC Aerospace Systems provides aerospace products and aftermarket services for commercial, military, business jet and general aviation customers worldwide. Products include electric power generation, management and distribution systems, flight control systems, engine control systems, intelligence, surveillance and reconnaissance systems, engine components, environmental control systems, fire protection and detection systems, propeller systems, aircraft nacelles, and interior, actuation, landing and electronic systems.
	Sikorsky products include military and commercial helicopters, aftermarket helicopter and aircraft parts and services.
	We have reported our financial and operational results for the periods presented herein under the five principal segments noted above, consistent with how we have reviewed our business operations for decision-making purposes, resource allocation and performance assessment during 2014.
	Segment Information. Total sales by segment include intersegment sales, which are generally made at prices approximating those that the selling entity is able to obtain on external sales. Segment information for the years ended December 31 is as follows:


			Net Sales												Operating Profits
	(dollars in millions)		2014				2013				2012				2014				2013				2012
	Otis		$	12,982			$	12,484			$	12,056			$	2,640			$	2,590			$	2,512

	UTC Climate, Controls & Security		16,823				16,809				17,090				2,782				2,590				2,425

	Pratt & Whitney		14,508				14,501				13,964				2,000				1,876				1,589

	UTC Aerospace Systems		14,215				13,347				8,334				2,355				2,018				944

	Sikorsky		7,451				6,253				6,791				219				594				712

	Total segment		65,979				63,394				58,235				9,996				9,668				8,182

	Eliminations and other		(879		)		(768		)		(527		)		261				22				(72		)

	General corporate expenses		—				—				—				(488		)		(481		)		(426		)

	Consolidated		$	65,100			$	62,626			$	57,708			$	9,769			$	9,209			$	7,684



			Total Assets												Capital Expenditures												Depreciation & Amortization
	(dollars in millions)		2014				2013				2012				2014				2013				2012				2014			2013			2012
	Otis		$	9,313			$	9,354			$	8,866			$	87			$	122			$	141			$	209		$	209		$	220

	UTC Climate, Controls & Security		21,217				21,543				22,253				228				266				265				349			380			418

	Pratt & Whitney		18,143				17,062				15,938				692				617				462				390			319			324

	UTC Aerospace Systems		35,034				35,461				35,589				533				510				367				807			761			412

	Sikorsky		4,973				5,762				4,975				116				119				94				86			85			85

	Total segment		88,680				89,182				87,621				1,656				1,634				1,329				1,841			1,754			1,459

	Eliminations and other		2,609				1,412				1,788				55				54				60				66			67			65

	Consolidated		$	91,289			$	90,594			$	89,409			$	1,711			$	1,688			$	1,389			$	1,907		$	1,821		$	1,524

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


			External Net Sales												Operating Profits												Long-Lived Assets
	(dollars in millions)		2014				2013				2012				2014				2013				2012				2014			2013			2012
	United States Operations		$	38,155			$	35,994			$	32,175			$	5,236			$	4,780			$	3,663			$	4,798		$	4,483		$	4,311

	International Operations
	Europe		12,630				12,652				11,823				2,292				2,419				2,100				1,645			1,796			1,804

	Asia Pacific		8,795				8,696				8,733				1,719				1,773				1,648				1,020			957			947

	Other		5,513				5,274				4,964				749				696				772				1,383			1,203			1,122

Eliminations and other		7				10				13				(227		)		(459		)		(499		)		430			427			334

Consolidated		$	65,100			$	62,626			$	57,708			$	9,769			$	9,209			$	7,684			$	9,276		$	8,866		$	8,518

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


(dollars in millions)		2014				2013				2012
Europe		$	4,960			$	4,489			$	3,117

Asia Pacific		4,508				4,517				2,998

Other		4,301				3,165				3,086

		$	13,769			$	12,171			$	9,201

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


(dollars in millions)		2014				2013				2012
Pratt & Whitney		$	3,126			$	3,559			$	3,718

UTC Aerospace Systems		2,459				2,530				1,742

Sikorsky		3,837				3,648				4,512

Other		197				142				126

		$	9,619			$	9,879			$	10,098

Selected_Quarterly_Financial_D

Selected Quarterly Financial Data - Unaudited	12 Months Ended
	Dec. 31, 2014
Selected Quarterly Financial Information [Abstract]
Quarterly Financial Information [Text Block]	SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)


		2014 Quarters								2013 Quarters
	(dollars in millions,	First		Second		Third		Fourth		First		Second		Third		Fourth
	except per share amounts)
	Net Sales	$	14,745	$	17,191	$	16,168	$	16,996	$	14,399	$	16,006	$	15,462	$	16,759

	Gross margin	4,055		4,260		4,702		4,636		3,934		4,454		4,442		4,475

	Net income attributable to common shareowners	1,213		1,680		1,854		1,473		1,266		1,560		1,432		1,463

	Earnings per share of Common Stock:
	Basic—net income	$	1.35	$	1.87	$	2.07	$	1.64	$	1.4	$	1.73	$	1.59	$	1.62

	Diluted—net income	$	1.32	$	1.84	$	2.04	$	1.62	$	1.39	$	1.71	$	1.57	$	1.6

	COMPARATIVE STOCK DATA (UNAUDITED)


		2014						2013
	(common stock)	High		Low		Dividend		High		Low		Dividend

	First quarter	$	118.31	$	107.91	$	0.59	$	93.59	$	83.55	$	0.535

	Second quarter	$	120.09	$	113.1	$	0.59	$	97.55	$	91.05	$	0.535

	Third quarter	$	115.93	$	103.79	$	0.59	$	112	$	93.8	$	0.535

	Fourth quarter	$	117.24	$	99.17	$	0.59	$	113.8	$	102.76	$	0.59

	Our common stock is listed on the New York Stock Exchange. The high and low prices are based on the Composite Tape of the New York Stock Exchange. There were approximately 20,639 registered shareholders at January 31, 2015.

Performance_Graph_Unaudited

Performance Graph - Unaudited	12 Months Ended
	Dec. 31, 2014
Performance Graph [Abstract]
Cumulative Total Shareholder Return [Text Block]	PERFORMANCE GRAPH (UNAUDITED)
	The following graph presents the cumulative total shareholder return for the five years ending December 31, 2014 for our common stock, as compared to the Standard & Poor's 500 Stock Index and to the Dow Jones 30 Industrial Average. Our common stock price is a component of both indices. These figures assume that all dividends paid over the five-year period were reinvested, and that the starting value of each index and the investment in common stock was $100.00 on December 31, 2009.
	COMPARISON OF CUMULATIVE FIVE YEAR TOTAL RETURN



		December
		2009		2010		2011		2012		2013		2014
	United Technologies Corporation	$	100	$	116.24	$	110.46	$	127.14	$	180.37	$	186.12

	S&P 500 Index	$	100	$	115.06	$	117.49	$	136.3	$	180.44	$	205.14

	Dow Jones Industrial Average	$	100	$	114.06	$	123.62	$	136.28	$	176.69	$	194.44

Summary_of_Accounting_Principl1

Summary of Accounting Principles (Policy)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Consolidation Policy [Text Block]

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

Cash And Cash Equivalents Policy [Text Block]

Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy

Accounts Receivable Policy [Text Block]

Marketable Equity Securities Policy

Inventories and Contracts in Progress Policy Text Block

Equity Method Investments Policy [Policy Text Block]

Goodwill And Intangible Assets Policy [Text Block]

Collaboration asset

30 years

Customer relationships and related programs

2 to 32 years

Purchased service contracts

5 to 31 years

Patents & trademarks

3 to 40 years

Exclusivity assets

3 to 25 years

Impairment Or Disposal Of Other Long Lived Assets Policy [Text Block]

Long-Term Financing Receivables Policy [Text Block]

(dollars in millions)

2014

2013

Long-term trade accounts receivable

838

714

Notes and leases receivable

424

583

Total long-term receivables

1,262

1,297

Income Tax Policy [Text Block]

Revenue Recognition Policy

Revenue Recognition, Incentives [Policy Text Block]

Research and Development Policy [Text Block]

Foreign Currency Transactions And Translations Policy [Text Block]

Derivatives and Hedging Activity Policy [Text Block]

Environmental Costs Policy

Pension and Postretirement Obligations Policy

Guarantees, Indemnifications and Warranties Policies [Policy Text Block]

Collaborative Arrangements Policy

(dollars in millions)

2014

2013

2012

Collaborator share of sales:

Cost of products sold

1,778

1,820

1,295

Cost of services sold

354

273

216

Collaborator share of program costs (reimbursement of expenses incurred):

Cost of products sold

(103

)

(127

)

(97

)

Research and development

(122

)

(194

)

(203

)

Selling, general and administrative

)

Schedule_II_Valuation_and_Qual1

Schedule II - Valuation and Qualifying Accounts (Tables)	12 Months Ended
	Dec. 31, 2014
SEC Schedule Article 12-09 Valuation And Qualifying Accounts [Abstract]
Schedule Of Valuation And Qualifying Accounts Disclosure [Text Block]	SCHEDULE II
	UNITED TECHNOLOGIES CORPORATION AND SUBSIDIARIES
	Valuation and Qualifying Accounts
	Three years ended December 31, 2014
	(Millions of Dollars)



	Allowances for Doubtful Accounts and Other Customer Financing Activity:
	Balance December 31, 2011	$	456

	Provision charged to income	72

	Doubtful accounts written off (net)	(23		)
	Other adjustments	12

	Balance December 31, 2012	517

	Provision charged to income	74

	Doubtful accounts written off (net)	(68		)
	Other adjustments	20

	Balance December 31, 2013	543

	Provision charged to income	93

	Doubtful accounts written off (net)	(91		)
	Other adjustments	(41		)
	Balance December 31, 2014	$	504

	Future Income Tax Benefits—Valuation allowance:
	Balance December 31, 2011	977

	Additions charged to income tax expense	124

	Additions charged to goodwill, due to acquisitions	71

	Reductions credited to income tax expense	(245		)
	Other adjustments	(23		)
	Balance December 31, 2012	904

	Additions charged to income tax expense	134

	Additions charged to goodwill, due to acquisitions	12

	Reductions credited to income tax expense	(52		)
	Other adjustments	(56		)
	Balance December 31, 2013	942

	Additions charged to income tax expense	91

	Reductions credited to income tax expense	(55		)
	Other adjustments 1	(366		)
	Balance December 31, 2014	$	612


	Note 1: Included in Other adjustments for the year ended December 31, 2014 are reductions in valuation allowances associated with an agreement with a state taxing authority for the monetization of tax credits.

Business_Acquisitions_Disposit1

Business Acquisitions, Dispositions, Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Schedule of Variable Interest Entities [Table Text Block]

	(dollars in millions)	2014		2013
	Current assets	$	1,820	$	1,616

	Noncurrent assets	756		1,066

	Total assets	$	2,576	$	2,682

	Current liabilities	$	1,795	$	1,895

	Noncurrent liabilities	1,227		1,085

	Total liabilities	$	3,022	$	2,980

Schedule of Goodwill [Text Block]

	(dollars in millions)	Balance as of		Goodwill			Foreign			Balance as of
		January 1,		resulting from			currency			December 31,
		2014		business			translation			2014
				combinations			and other
	Otis	$	1,741	$	35		$	(112	)	$	1,664

	UTC Climate, Controls & Security	9,727		13			(332		)	9,408

	Pratt & Whitney	1,273		208			—			1,481

	UTC Aerospace Systems	15,069		—			(177		)	14,892

	Sikorsky	353		—			(6		)	347

	Total Segments	28,163		256			(627		)	27,792

	Eliminations and other	5		—			(1		)	4

	Total	$	28,168	$	256		$	(628	)	$	27,796

Intangible Assets Disclosure [Text Block]

		2014					2013
	(dollars in millions)	Gross		Accumulated			Gross			Accumulated
		Amount		Amortization			Amount			Amortization
	Amortized:
	Service portfolios	$	2,103	$	(1,309	)	$	2,234		$	(1,295	)

	Patents and trademarks	361		(190		)	380			(181		)

	IAE collaboration	2,872		(20		)	2,273			—

	Customer relationships and other	12,189		(2,623		)	12,049			(2,199		)

		17,525		(4,142		)	16,936			(3,675		)

	Unamortized:
	Trademarks and other	2,177		—			2,260			—

	Total	$	19,702	$	(4,142	)	$	19,196		$	(3,675	)

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

	(dollars in millions)	2015		2016			2017			2018			2019

	Amortization expense	$	707	$	715		$	764		$	828		$	806

Discontinued_Operations_Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]

	(dollars in millions)	2013
	Discontinued Operations:
	Net sales	$	309

	Income from operations	$	63

	Income tax expense	(32		)
	Income from operations, net of income taxes	31

	Loss on disposal	(33		)
	Income tax benefit	37

	Net income from discontinued operations	$	35

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic, by Common Class [Text Block]

	(dollars in millions, except per share amounts; shares in millions)	2014		2013		2012
	Net income attributable to common shareowners:
	Net income from continuing operations	$	6,220	$	5,686	$	4,847

	Net income from discontinued operations	—		35		283

	Net income attributable to common shareowners	$	6,220	$	5,721	$	5,130

	Basic weighted average number of shares outstanding	898.3		901		895.2

	Stock awards	13.3		14.1		11.4

	Diluted weighted average number of shares outstanding	911.6		915.1		906.6

	Earnings Per Share of Common Stock—Basic:
	Net income from continuing operations	$	6.92	$	6.31	$	5.41

	Net income from discontinued operations	—		0.04		0.32

	Net income attributable to common shareowners	6.92		6.35		5.73

	Earnings Per Share of Common Stock—Diluted:
	Net income from continuing operations	$	6.82	$	6.21	$	5.35

	Net income from discontinued operations	—		0.04		0.31

	Net income attributable to common shareowners	6.82		6.25		5.66

Schedule of Earnings Per Share, Diluted, by Common Class [Text Block]

	(dollars in millions, except per share amounts; shares in millions)	2014		2013		2012
	Net income attributable to common shareowners:
	Net income from continuing operations	$	6,220	$	5,686	$	4,847

	Net income from discontinued operations	—		35		283

	Net income attributable to common shareowners	$	6,220	$	5,721	$	5,130

	Basic weighted average number of shares outstanding	898.3		901		895.2

	Stock awards	13.3		14.1		11.4

	Diluted weighted average number of shares outstanding	911.6		915.1		906.6

	Earnings Per Share of Common Stock—Basic:
	Net income from continuing operations	$	6.92	$	6.31	$	5.41

	Net income from discontinued operations	—		0.04		0.32

	Net income attributable to common shareowners	6.92		6.35		5.73

	Earnings Per Share of Common Stock—Diluted:
	Net income from continuing operations	$	6.82	$	6.21	$	5.35

	Net income from discontinued operations	—		0.04		0.31

	Net income attributable to common shareowners	6.82		6.25		5.66

Commercial_Aerospace_Industry_1

Commercial Aerospace Industry Assets and Commitments (Tables)	12 Months Ended
	Dec. 31, 2014
Other Commitments [Abstract]
Commercial Aerospace Industry Assets and Commitments Table [Text Block]

	(dollars in millions)	Committed			2015			2016			2017			2018			2019			Thereafter
	Notes and leases receivable	$	424		$	43		$	103		$	42		$	26		$	25		$	185

	Commercial aerospace financing commitments	$	3,152		$	574		$	489		$	363		$	449		$	375		$	902

	Other commercial aerospace commitments	8,165			763			858			948			899			774			3,923

	Collaboration partners' share	(2,840		)	(370		)	(381		)	(383		)	(380		)	(296		)	(1,030		)
	Total commercial commitments	$	8,477		$	967		$	966		$	928		$	968		$	853		$	3,795

Inventories_and_Contracts_in_P1

Inventories and Contracts in Progress (Tables)	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventory Table [Text Block]

	(dollars in millions)	2014			2013
	Raw materials	$	2,056		$	1,983

	Work-in-process	3,596			4,600

	Finished goods	3,776			3,360

	Contracts in progress	8,189			7,929

		17,617			17,872

	Less:
	Progress payments, secured by lien, on U.S. Government contracts	(300		)	(279		)
	Billings on contracts in progress	(7,452		)	(7,263		)
		$	9,865		$	10,330

Fixed_Assets_Tables

Fixed Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Fixed Assets [Text Block]

	(dollars in millions)	Estimated	2014			2013
		Useful Lives
	Land		$	408		$	434

	Buildings and improvements	12-40 years	5,697			5,633

	Machinery, tools and equipment	3-20 years	12,375			11,353

	Other, including assets under construction		1,284			1,241

			19,764			18,661

	Accumulated depreciation		(10,488		)	(9,795		)

			$	9,276		$	8,866

Accrued_Liabilities_Tables

Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Accrued Liabilities [Abstract]
Schedule of Accrued Liabilities Table [Text Block]

	(dollars in millions)	2014		2013
	Advances on sales contracts and service billings	$	5,262	$	6,444

	Accrued salaries, wages and employee benefits	1,909		1,901

	Service and warranty accruals	533		505

	Litigation and contract matters	505		526

	Interest payable	503		481

	Income taxes payable	309		540

	Accrued property, sales and use taxes	285		280

	Accrued workers compensation	275		218

	Accrued restructuring costs	264		337

	Other	4,161		4,103

		$	14,006	$	15,335

Borrowings_and_Lines_of_Credit1

Borrowings and Lines of Credit (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Short-term Debt [Text Block]

	(dollars in millions)	2014			2013
	Short-term borrowings:
	Commercial paper	$	—		$	200

	Other borrowings	126			188

	Total short-term borrowings	$	126		$	388

Long-term Debt [Text Block]

	(dollars in millions)
	2015	$	1,796

	2016	110

	2017	2,518

	2018	118

	2019	1,570

	Thereafter	13,388

	Total	$	19,500



	(dollars in millions)	2014			2013
	LIBOR § plus 0.500% floating rate notes due 2015	$	500		$	500

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

	6.290% notes due 2016‡	—			188

	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*	1,250			1,250

	8.875% notes due 2019	271			271

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

	4.875% notes due 2020‡	171			171

	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	147			86

Other (including capitalized leases)‡	378			394

Total principal long-term debt	19,500			19,643

Other (fair market value adjustments and discounts)‡	168			210

Total long-term debt	19,668			19,853

Less: current portion	1,796			112

Long-term debt, net of current portion	$	17,872		$	19,741


*	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 December 31, 2014 was approximately 0.2%.

Equity_Tables

Equity (Tables)	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

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

	Other comprehensive (loss) income before reclassifications, net	(509		)	2,409			208			(100		)	2,008

	Amounts reclassified, pre-tax	25			906			(91		)	23			863

	Tax (benefit) expense reclassified	—			(332		)	34			(5		)	(303		)

	Balance at December 31, 2013	$	170		$	(3,267	)	$	296		$	(79	)	$	(2,880	)

	Other comprehensive (loss) income before reclassifications, net	(1,228		)	(2,708		)	28			(205		)	(4,113		)

	Amounts reclassified, pre-tax	7			416			(20		)	96			499

	Tax (benefit) expense reclassified	—			(150		)	4			(21		)	(167		)

	Balance at December 31, 2014	$	(1,051	)	$	(5,709	)	$	308		$	(209	)	$	(6,661	)

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

	(dollars in millions)	2014			2013			2012
	Net income attributable to common shareowners	$	6,220		$	5,721		$	5,130

	Transfers to noncontrolling interests:
	Increase in common stock for sale of subsidiary shares	4			—			—

	Decrease in common stock for purchase of subsidiary shares	(75		)	(49		)	(34		)
	Net income attributable to common shareowners after transfers to noncontrolling interests	$	6,149		$	5,672		$	5,096

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Notes to Consolidated Financial Statements [Abstract]
Schedule of Income before Income Tax Domestic and Foreign Table [Text Block]

	(dollars in millions)	2014				2013				2012
	United States	$	4,270			$	3,658			$	2,595

	Foreign	4,617				4,654				4,316

		$	8,887			$	8,312			$	6,911

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

	(dollars in millions)	2014				2013				2012
	Current:
	United States:
	Federal	$	349			$	616			$	403

	State	47				55				9

	Foreign	1,492				1,325				1,179

		1,888				1,996				1,591

	Future:
	United States:
	Federal	408				262				335

	State	(39		)		36				111

	Foreign	7				(56		)		(326		)

		376				242				120

	Income tax expense	$	2,264			$	2,238			$	1,711

	Attributable to items credited (charged) to equity and goodwill	$	1,535			$	(1,661	)		$	297

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

		2014			2013			2012
	Statutory U.S. federal income tax rate	35	%		35	%		35	%
	Tax on international activities	(3.4	)%		(5.8	)%		(6.4	)%
	Tax audit settlements	(4.2	)%		(0.4	)%		(3.4	)%
	Other	(1.9	)%		(1.9	)%		(0.4	)%
	Effective income tax rate	25.5	%		26.9	%		24.8	%
Schedule of Deferred Tax Assets and Liabilities Table [Text Block]

	(dollars in millions)	2014				2013
	Future income tax benefits:
	Insurance and employee benefits	$	1,122			$	747

	Other asset basis differences	369				365

	Other liability basis differences	1,039				1,187

	Tax loss carryforwards	418				386

	Tax credit carryforwards	905				1,184

	Valuation allowances	(428		)		(669		)
		$	3,425			$	3,200

	Future income taxes payable:
	Insurance and employee benefits	$	(1,911	)		$	(992	)
	Other asset basis differences	4,584				4,649

	Other items, net	(124		)		(178		)
	Tax loss carryforwards	(242		)		(346		)
	Tax credit carryforwards	(58		)		(68		)
	Valuation allowances	184				273

		$	2,433			$	3,338

Summary Of Tax Credit Carryforwards [Text Block]

	(dollars in millions)	Tax Credit				Tax Loss
		Carryforwards				Carryforwards
	Expiration period:
	2015-2019	$	29			$	555

	2020-2024	10				242

	2025-2034	243				726

	Indefinite	681				2,118

	Total	$	963			$	3,641

Summary Of Operating Loss Carryforwards [Text Block]

	(dollars in millions)	Tax Credit				Tax Loss
		Carryforwards				Carryforwards
	Expiration period:
	2015-2019	$	29			$	555

	2020-2024	10				242

	2025-2034	243				726

	Indefinite	681				2,118

	Total	$	963			$	3,641

Summary Of Income Tax Contingencies [Text Block]

	(dollars in millions)	2014				2013				2012
	Balance at January 1	$	1,223			$	1,073			$	946

	Additions for tax positions related to the current year	164				113				232

	Additions for tax positions of prior years	435				211				221

	Reductions for tax positions of prior years	(47		)		(41		)		(21		)
	Settlements	(686		)		(133		)		(305		)
	Balance at December 31	$	1,089			$	1,223			$	1,073

	Gross interest expense related to unrecognized tax benefits	$	180			$	51			$	40

	Total accrued interest balance at December 31	$	292			$	262			$	270

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	12 Months Ended
Employee Benefit Plans (Tables)	Dec. 31, 2014
Employee Benefits and Share-based Compensation [Abstract]
Schedule of Defined Benefit Plans Disclosures [Text Block]

	(dollars in millions)
	Current year actuarial loss	$	9
	Current year actuarial loss	$	9
	Amortization of prior service credit	1
	Amortization of prior service credit	1
	Amortization of actuarial net gain	4
	Amortization of actuarial net gain	4
	Other	(1		)
	Total recognized in other comprehensive loss	$	13
	Total recognized in other comprehensive loss	$	13
	Net recognized in net periodic other postretirement benefit cost and other comprehensive loss	$	52
		$	52


	(dollars in millions)	2014				2013
	Projected benefit obligation	$	34,261			$	22,142
	Projected benefit obligation	$	34,261			$	22,142
	Accumulated benefit obligation	33,495				21,475
	Accumulated benefit obligation	33,495				21,475
	Fair value of plan assets	28,478				19,884
	Fair value of plan assets	28,478				19,884


			Benefit Obligation						Net Cost
			2014			2013			2014			2013			2012
	Discount rate		3.8	%		4.7	%		4.7	%		4	%		4.6	%
	Salary scale		4.2	%		4.2	%		4.2	%		4.2	%		4.3	%
	Expected return on plan assets		—			—			7.6	%		7.7	%		7.7	%
	Expected return on plan assets		—			—			7.6	%		7.7	%		7.7	%


		Benefit Obligation						Net Cost
		2014			2013			2014			2013			2012
	Discount rate	3.8	%		4.4	%		4.4	%		3.6	%		4.2	%


	(dollars in millions)	Enhanced				Private				Corporate				Real				Total
		Global				Equities				Bonds				Estate
		Equities
	Balance, December 31, 2012	$	447			$	1,202			$	276			$	1,785			$	3,710
	Balance, December 31, 2012	$	447			$	1,202			$	276			$	1,785			$	3,710
	Realized gains	—				195				—				20				215
	Realized gains	—				195				—				20				215
	Unrealized gains (losses) relating to instruments still held in the reporting period	50				(9		)		2				102				145
		50				(9		)		2				102				145
	Purchases, sales, and settlements, net	3				(49		)		18				(107		)		(135		)
	Purchases, sales, and settlements, net	3				(49		)		18				(107		)		(135		)
	Balance, December 31, 2013	500				1,339				296				1,800				3,935
	Balance, December 31, 2013	500				1,339				296				1,800				3,935
	Realized gains	35				257				—				11				303
	Realized gains	35				257				—				11				303
	Unrealized (losses) gains relating to instruments still held in the reporting period	(23		)		(23		)		1				79				34
		(23		)		(23		)		1				79				34
	Purchases, sales, and settlements, net	13				(173		)		12				23				(125		)
	Purchases, sales, and settlements, net	13				(173		)		12				23				(125		)
	Balance, December 31, 2014	$	525			$	1,400			$	309			$	1,913			$	4,147
	Balance, December 31, 2014	$	525			$	1,400			$	309			$	1,913			$	4,147


	(dollars in millions)
	Current year actuarial loss	$	4,353
	Current year actuarial loss	$	4,353
Amortization of actuarial loss	(429		)
Current year prior service cost	5
Current year prior service cost	5
Amortization of prior service credit	8
Amortization of prior service credit	8
Other	(120		)
Total recognized in other comprehensive loss	$	3,817
Total recognized in other comprehensive loss	$	3,817
Net recognized in net periodic pension cost and other comprehensive loss	$	4,040
	$	4,040


	2014			2013
Health care cost trend rate assumed for next year	7	%		7.5	%
Rate that the cost trend rate gradually declines to	5	%		5	%
Year that the rate reaches the rate it is assumed to remain at	2019			2019
	2019			2019


(dollars in millions)
Net actuarial loss	$	888
Net actuarial loss	$	888
Prior service credit	(13		)
	$	875
	$	875


(dollars in millions)	2014				2013				2012
Pension Benefits:
Service cost	$	487			$	569			$	500
Service cost	$	487			$	569			$	500
Interest cost	1,517				1,373				1,331
Interest cost	1,517				1,373				1,331
Expected return on plan assets	(2,215		)		(2,107		)		(1,944		)
Amortization of prior service credit	(8		)		(34		)		(24		)
Amortization of unrecognized net transition obligation	—				—				1
Amortization of unrecognized net transition obligation	—				—				1
Recognized actuarial net loss	429				954				722
Recognized actuarial net loss	429				954				722
Net settlement and curtailment loss	13				1				77
Net settlement and curtailment loss	13				1				77
Net periodic pension cost - employer	$	223			$	756			$	663
Net periodic pension cost - employer	$	223			$	756			$	663


	2014 One-Percentage-Point
(dollars in millions)	Increase				Decrease
(dollars in millions)	Increase				Decrease
Effect on total service and interest cost	$	3			$	(3	)
Effect on total service and interest cost	$	3			$	(3	)
Effect on postretirement benefit obligation	54				(46		)
Effect on postretirement benefit obligation	54				(46		)


(dollars in millions)	2014				2013
Change in Benefit Obligation:
Beginning balance	$	33,026			$	35,708
Beginning balance	$	33,026			$	35,708
Service cost	487				569
Service cost	487				569
Interest cost	1,517				1,373
Interest cost	1,517				1,373
Actuarial loss (gain)	5,277				(3,027		)
Actuarial loss (gain)	5,277				(3,027		)
Total benefits paid	(1,939		)		(1,601		)
Net settlement and curtailment gain	(1		)		(53		)
Plan amendments	5				224
Plan amendments	5				224
Other	(519		)		(167		)
Ending balance	$	37,853			$	33,026
Ending balance	$	37,853			$	33,026

Change in Plan Assets:
Beginning balance	$	31,355			$	29,928
Beginning balance	$	31,355			$	29,928
Actual return on plan assets	3,140				3,019
Actual return on plan assets	3,140				3,019
Employer contributions	615				236
Employer contributions	615				236
Benefits paid from plan assets	(1,939		)		(1,601		)
Other	(433		)		(227		)
Ending balance	$	32,738			$	31,355
Ending balance	$	32,738			$	31,355

Funded Status:
Fair value of plan assets	$	32,738			$	31,355
Fair value of plan assets	$	32,738			$	31,355
Benefit obligations	(37,853		)		(33,026		)
Funded status of plan	$	(5,115	)		$	(1,671	)

Amounts Recognized in the Consolidated Balance Sheet Consist of:
Noncurrent assets	$	681			$	768
Noncurrent assets	$	681			$	768
Current liability	(104		)		(74		)
Noncurrent liability	(5,692		)		(2,365		)
Net amount recognized	$	(5,115	)		$	(1,671	)

Amounts Recognized in Accumulated Other Comprehensive Loss Consist of:
Net actuarial loss	$	9,068			$	5,261
Net actuarial loss	$	9,068			$	5,261
Prior service credit	(27		)		(37		)
Net amount recognized	$	9,041			$	5,224
Net amount recognized	$	9,041			$	5,224


(dollars in millions)	2014				2013				2012
Other Postretirement Benefits:
Service cost	$	3			$	3			$	3
Service cost	$	3			$	3			$	3
Interest cost	41				38				37
Interest cost	41				38				37
Amortization of prior service credit	(1		)		(10		)		(4		)
Recognized actuarial net gain	(4		)		(4		)		(6		)
Net settlement and curtailment gain	—				—				(2		)
Net settlement and curtailment gain	—				—				(2		)
Net periodic other postretirement benefit cost	$	39			$	27			$	28
Net periodic other postretirement benefit cost	$	39			$	27			$	28


(dollars in millions)	Quoted Prices in				Significant				Significant				Total
	Active Markets				Observable Inputs				Unobservable Inputs
	For Identical Assets				(Level 2)				(Level 3)
	(Level 1)
Asset Category:
Public Equities
Global Equities	$	6,569			$	2			$	—			$	6,571
Global Equities	$	6,569			$	2			$	—			$	6,571
Global Equity Commingled Funds 1	—				5,431				—				5,431
Global Equity Commingled Funds 1	—				5,431				—				5,431
Enhanced Global Equities 2	292				2,191				525				3,008
Enhanced Global Equities 2	292				2,191				525				3,008
Private Equities 3	—				—				1,400				1,400
Private Equities 3	—				—				1,400				1,400
Fixed Income Securities
Fixed Income Securities
Governments	509				1,132				—				1,641
Governments	509				1,132				—				1,641
Corporate Bonds	4				9,190				309				9,503
Corporate Bonds	4				9,190				309				9,503
Structured Products 4	—				124				—				124
Structured Products 4	—				124				—				124
Real Estate 5	—				12				1,913				1,925
Real Estate 5	—				12				1,913				1,925
Other 6	—				2,244				—				2,244
Other 6	—				2,244				—				2,244
Cash & Cash Equivalents 7	201				247				—				448
Cash & Cash Equivalents 7	201				247				—				448
Subtotal	$	7,575			$	20,573			$	4,147			32,295
Subtotal	$	7,575			$	20,573			$	4,147			32,295
Other Assets & Liabilities 8													443
Other Assets & Liabilities 8													443
Total at December 31, 2014													$	32,738
Total at December 31, 2014													$	32,738
Public Equities
Global Equities	$	6,840			$	1			$	—			$	6,841
Global Equities	$	6,840			$	1			$	—			$	6,841
Global Equity Commingled Funds 1	—				4,881				—				4,881
Global Equity Commingled Funds 1	—				4,881				—				4,881
Enhanced Global Equities 2	261				2,241				500				3,002
Enhanced Global Equities 2	261				2,241				500				3,002
Private Equities 3	—				—				1,339				1,339
Private Equities 3	—				—				1,339				1,339
Fixed Income Securities
Fixed Income Securities
Governments	424				1,307				—				1,731
Governments	424				1,307				—				1,731
Corporate Bonds	—				8,461				296				8,757
Corporate Bonds	—				8,461				296				8,757
Structured Products 4	—				80				—				80
Structured Products 4	—				80				—				80
Real Estate 5	—				13				1,800				1,813
Real Estate 5	—				13				1,800				1,813
Other 6	—				2,110				—				2,110
Other 6	—				2,110				—				2,110
Cash & Cash Equivalents 7	2				207				—				209
Cash & Cash Equivalents 7	2				207				—				209
Subtotal	$	7,527			$	19,301			$	3,935			30,763
Subtotal	$	7,527			$	19,301			$	3,935			30,763
Other Assets & Liabilities 8													592
Other Assets & Liabilities 8													592
Total at December 31, 2013													$	31,355
Total at December 31, 2013													$	31,355


(dollars in millions)	2014				2013
Change in Benefit Obligation:
Beginning balance	$	987			$	1,106
Beginning balance	$	987			$	1,106
Service cost	3				3
Service cost	3				3
Interest cost	41				38
Interest cost	41				38
Actuarial loss (gain)	7				(62		)
Actuarial loss (gain)	7				(62		)
Total benefits paid	(107		)		(119		)
Other	21				21
Other	21				21
Ending balance	$	952			$	987
Ending balance	$	952			$	987

Change in Plan Assets:
Beginning balance	$	—			$	—
Beginning balance	$	—			$	—
Employer contributions	85				95
Employer contributions	85				95
Benefits paid from plan assets	(107		)		(119		)
Other	22				24
Other	22				24
Ending balance	$	—			$	—
Ending balance	$	—			$	—

Funded Status:
Fair value of plan assets	$	—			$	—
Fair value of plan assets	$	—			$	—
Benefit obligations	(952		)		(987		)
Funded status of plan	$	(952	)		$	(987	)

Amounts Recognized in the Consolidated Balance Sheet Consist of:
Current liability	$	(89	)		$	(86	)
Noncurrent liability	(863		)		(901		)
Net amount recognized	$	(952	)		$	(987	)

Amounts Recognized in Accumulated Other Comprehensive Loss Consist of:
Net actuarial gain	$	(113	)		$	(124	)
Prior service cost (credit)	1				(1		)
Prior service cost (credit)	1				(1		)
Net amount recognized	$	(112	)		$	(125	)
Disclosure Of Share Based Compensation Arrangements By Share Based Payment Award Text Block

		Stock Options							Stock Appreciation Rights							Performance Share Units						Other
		Stock Options							Stock Appreciation Rights							Performance Share Units						Incentive
	(shares and units in thousands)	Shares			Average				Shares			Average				Units			Average			Shares/Units
	(shares and units in thousands)	Shares			Price*				Shares			Price*				Units			Price**
	Outstanding at:
	December 31, 2013	6,239			$	57.88			38,215			$	72.33			2,701			$	78.77		1,478
	December 31, 2013	6,239			$	57.88			38,215			$	72.33			2,701			$	78.77		1,478
	Granted	194			112.54				4,516			112.47				688			112.49			387
	Granted	194			112.54				4,516			112.47				688			112.49			387
	Ancillary***	—			—				—			—				292			79			—
	Ancillary***	—			—				—			—				292			79			—
	Exercised/earned	(3,846	)		51.57				(3,941	)		66.54				(1,095	)		79			(324	)
	Exercised/earned	(3,846	)		51.57				(3,941	)		66.54				(1,095	)		79			(324	)
	Cancelled	(299	)		52.91				(386	)		89.16				(54	)		88.09			(46	)
	Cancelled	(299	)		52.91				(386	)		89.16				(54	)		88.09			(46	)
	December 31, 2014	2,288			$	73.76			38,404			$	77.48			2,532			$	87.65		1,495
	December 31, 2014	2,288			$	73.76			38,404			$	77.48			2,532			$	87.65		1,495


			2014			2013			2012
	Expected volatility		22% - 26%			26% - 27%			30% - 35%
	Expected volatility		22% - 26%			26% - 27%			30% - 35%
	Weighted-average volatility		26	%		27	%		30	%
	Expected term (in years)		7.6 - 8.0			7.3 - 7.6			7.4 - 7.7
	Expected term (in years)		7.6 - 8.0			7.3 - 7.6			7.4 - 7.7
	Expected dividends		2.2	%		2.6	%		2.3	%
	Risk-free rate		0.0% - 3.1%			0.1% - 1.9%			0.0% - 2.0%
	Risk-free rate		0.0% - 3.1%			0.1% - 1.9%			0.0% - 2.0%


			Equity Awards Vested and Expected to Vest														Equity Awards That Are Exercisable
	(shares in thousands; aggregate intrinsic value in millions)		Awards			Average				Aggregate				Remaining			Awards			Average			Aggregate		Remaining
						Price*				Intrinsic				Term**						Price*			Intrinsic		Term**
										Value													Value
	Stock Options/Stock Appreciation Rights		40,553			$	76.56			$	1,559			5.6			24,763			$	68.13		$	1,161	4
	Stock Options/Stock Appreciation Rights		40,553			$	76.56			$	1,559			5.6			24,763			$	68.13		$	1,161	4
	Performance Share Units/Restricted Stock		3,230			—				371				1.1
	Performance Share Units/Restricted Stock		3,230			—				371				1.1
Schedule Of Multiemployer Plans Table [Text Block]

	(dollars in millions)				Pension				FIP/		Contributions
					Protection Act				RP Status
					Zone Status
	Pension Fund		EIN/Pension		2014		2013		Pending/		2014				2013				2012			Surcharge		Expiration Date of
			Plan Number						Implemented													Imposed		Collective-Bargaining
																								Agreement
	National Elevator Industry Pension Plan		23-2694291		Green		Green		No		$	79			$	71			$	63		No		8-Jul-17
	National Elevator Industry Pension Plan		23-2694291		Green		Green		No		$	79			$	71			$	63		No		8-Jul-17
	Other funds										34				34				36
	Other funds										34				34				36
											$	113			$	105			$	99
											$	113			$	105			$	99

Restructuring_and_Other_Costs_

Restructuring and Other Costs (Tables)	12 Months Ended
	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Schedule of Restructuring and Related Costs [Text Block]

	(dollars in millions)
	Otis	$	87

	UTC Climate, Controls & Security	116

	Pratt & Whitney	64

	UTC Aerospace Systems	82

	Sikorsky	14

	Eliminations and other	5

	Total	$	368



	(dollars in millions)
	Cost of sales	$	183

	Selling, general and administrative	185

	Total	$	368

Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Schedule of Restructuring Reserve by Type of Cost [Text Block]

	(dollars in millions)	Severance			Asset Write-Downs			Facility Exit, Lease Termination & Other Costs			Total
	Net pre-tax restructuring costs	$	275		$	8		$	62		$	345

	Utilization and foreign exchange	(113		)	(8		)	(53		)	(174		)
	Balance at December 31, 2014	$	162		$	—		$	9		$	171

Schedule of Restructuring and Related Costs [Text Block]

	(dollars in millions)	Expected Costs			Cost Incurred During 2014			Remaining Costs at December 31, 2014
	Otis	$	137		$	(98	)	$	39

	UTC Climate, Controls & Security	122			(86		)	36

	Pratt & Whitney	84			(64		)	20

	UTC Aerospace Systems	115			(72		)	43

	Sikorsky	20			(20		)	—

	Eliminations and other	5			(5		)	—

	Total	$	483		$	(345	)	$	138

Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Schedule of Restructuring Reserve by Type of Cost [Text Block]

	(dollars in millions)	Severance			Asset			Facility Exit,			Total
					Write-			Lease
					Downs			Termination
								and Other
								Costs
	Restructuring accruals at January 1, 2014	$	196		$	—		$	19		$	215

	Net pre-tax restructuring costs	9			1			19			29

	Utilization and foreign exchange	(137		)	(1		)	(21		)	(159		)
	Balance at December 31, 2014	$	68		$	—		$	17		$	85

Schedule of Restructuring and Related Costs [Text Block]

	(dollars in millions)	Expected			Costs			Costs			Remaining
		Costs			Incurred			Incurred			Costs at
					During			During			December 31,
					2013			2014			2014
	Otis	$	69		$	(69	)	$	—		$	—

	UTC Climate, Controls & Security	121			(89		)	(25		)	7

	Pratt & Whitney	162			(154		)	(5		)	3

	UTC Aerospace Systems	86			(71		)	(7		)	8

	Sikorsky	30			(38		)	8			—

	Total	$	468		$	(421	)	$	(29	)	$	18

Financial_Instruments_Tables

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Text Block]

		Asset Derivatives						Liability Derivatives
	(dollars in millions)	2014			2013			2014		2013
	Derivatives designated as hedging instruments	$	3		$	59		$	248	$	103

	Derivatives not designated as hedging instruments	139			31			71		54

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

		Year Ended December 31,
	(dollars in millions)	2014			2013
	Loss recorded in Accumulated other comprehensive loss	$	(263	)	$	(136	)
	Loss reclassified from Accumulated other comprehensive loss into Product sales (effective portion)	$	96		$	25

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value, by Balance Sheet Grouping [Text Block]

	2014 *(dollars in millions)*	Total			Level 1			Level 2			Level 3

	Recurring fair value measurements:
	Available-for-sale securities	$	961		$	961		$	—		$	—

	Derivative assets	142			—			142			—

	Derivative liabilities	(319		)	—			(319		)	—

	Nonrecurring fair value measurements:
	Business dispositions	3			—			3			—



	2013 *(dollars in millions)*	Total			Level 1			Level 2			Level 3

	Recurring fair value measurements:
	Available-for-sale securities	$	988		$	988		$	—		$	—

	Derivative assets	90			—			90			—

	Derivative liabilities	(157		)	—			(157		)	—

	Nonrecurring fair value measurements:
	Business dispositions	66			—			66			—

Fair Value, Measurement Inputs, Disclosure [Text Block]

		December 31, 2014						December 31, 2013
	(dollars in millions)	Carrying			Fair			Carrying			Fair
		Amount			Value			Amount			Value
	Long-term receivables	$	214		$	204		$	655		$	586

	Customer financing notes receivable	262			260			394			366

	Short-term borrowings	(126		)	(126		)	(388		)	(388		)
	Long-term debt (excluding capitalized leases)	(19,634		)	(22,254		)	(19,807		)	(21,525		)
	Long-term liabilities	(80		)	(74		)	(283		)	(253		)


	(dollars in millions)	Total			Level 1			Level 2			Level 3

	Long-term receivables	$	204		$	—		$	204		$	—

	Customer financing notes receivable	260			—			260			—

	Short-term borrowings	(126		)	—			—			(126		)

	Long-term debt (excluding capitalized leases)	(22,254		)	—			(21,883		)	(371		)

	Long-term liabilities	(74		)	—			(74		)	—

Guarantees_Tables

Guarantees (Tables)	12 Months Ended
	Dec. 31, 2014
Guarantees [Abstract]
Schedule of Guarantor Obligations [Text Block]

		December 31, 2014						December 31, 2013
	(dollars in millions)	Maximum			Carrying			Maximum		Carrying
		Potential			Amount of			Potential		Amount of
		Payment			Liability			Payment		Liability
	Commercial aerospace financing arrangements (see Note 5)	$	632		$	21		$	615	$	25

	Credit facilities and debt obligations—unconsolidated subsidiaries (expire 2015 to 2034)	211			15			231		6

	Performance guarantees	136			—			150		—

Product Warranty Disclosure [Text Block]

		Year ended December 31,
	(dollars in millions)	2014			2013
	Balance as of January 1	$	1,360		$	1,332

	Warranties and performance guarantees issued	337			313

	Settlements made	(344		)	(287		)
	Other	(40		)	2

	Balance as of December 31	$	1,313		$	1,360

Segment_Financial_Data_Tables

Segment Financial Data (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Schedule Of Segment Reporting Information By Segment [Text Block]

		Net Sales									Operating Profits
	(dollars in millions)	2014			2013			2012			2014			2013			2012
	Otis	$	12,982		$	12,484		$	12,056		$	2,640		$	2,590		$	2,512

	UTC Climate, Controls & Security	16,823			16,809			17,090			2,782			2,590			2,425

	Pratt & Whitney	14,508			14,501			13,964			2,000			1,876			1,589

	UTC Aerospace Systems	14,215			13,347			8,334			2,355			2,018			944

	Sikorsky	7,451			6,253			6,791			219			594			712

	Total segment	65,979			63,394			58,235			9,996			9,668			8,182

	Eliminations and other	(879		)	(768		)	(527		)	261			22			(72		)

	General corporate expenses	—			—			—			(488		)	(481		)	(426		)

	Consolidated	$	65,100		$	62,626		$	57,708		$	9,769		$	9,209		$	7,684



		Total Assets									Capital Expenditures									Depreciation & Amortization
	(dollars in millions)	2014			2013			2012			2014			2013			2012			2014		2013		2012
	Otis	$	9,313		$	9,354		$	8,866		$	87		$	122		$	141		$	209	$	209	$	220

	UTC Climate, Controls & Security	21,217			21,543			22,253			228			266			265			349		380		418

	Pratt & Whitney	18,143			17,062			15,938			692			617			462			390		319		324

	UTC Aerospace Systems	35,034			35,461			35,589			533			510			367			807		761		412

	Sikorsky	4,973			5,762			4,975			116			119			94			86		85		85

	Total segment	88,680			89,182			87,621			1,656			1,634			1,329			1,841		1,754		1,459

	Eliminations and other	2,609			1,412			1,788			55			54			60			66		67		65

	Consolidated	$	91,289		$	90,594		$	89,409		$	1,711		$	1,688		$	1,389		$	1,907	$	1,821	$	1,524

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

	(dollars in millions)	2014			2013			2012
	Europe	$	4,960		$	4,489		$	3,117

	Asia Pacific	4,508			4,517			2,998

	Other	4,301			3,165			3,086

		$	13,769		$	12,171		$	9,201



		External Net Sales									Operating Profits									Long-Lived Assets
	(dollars in millions)	2014			2013			2012			2014			2013			2012			2014		2013		2012
	United States Operations	$	38,155		$	35,994		$	32,175		$	5,236		$	4,780		$	3,663		$	4,798	$	4,483	$	4,311

	International Operations
	Europe	12,630			12,652			11,823			2,292			2,419			2,100			1,645		1,796		1,804

	Asia Pacific	8,795			8,696			8,733			1,719			1,773			1,648			1,020		957		947

	Other	5,513			5,274			4,964			749			696			772			1,383		1,203		1,122

	Eliminations and other	7			10			13			(227		)	(459		)	(499		)	430		427		334

	Consolidated	$	65,100		$	62,626		$	57,708		$	9,769		$	9,209		$	7,684		$	9,276	$	8,866	$	8,518

Long-lived Assets by Geographic Areas [Table Text Block]

		External Net Sales									Operating Profits									Long-Lived Assets
	(dollars in millions)	2014			2013			2012			2014			2013			2012			2014		2013		2012
	United States Operations	$	38,155		$	35,994		$	32,175		$	5,236		$	4,780		$	3,663		$	4,798	$	4,483	$	4,311

	International Operations
	Europe	12,630			12,652			11,823			2,292			2,419			2,100			1,645		1,796		1,804

	Asia Pacific	8,795			8,696			8,733			1,719			1,773			1,648			1,020		957		947

	Other	5,513			5,274			4,964			749			696			772			1,383		1,203		1,122

	Eliminations and other	7			10			13			(227		)	(459		)	(499		)	430		427		334

	Consolidated	$	65,100		$	62,626		$	57,708		$	9,769		$	9,209		$	7,684		$	9,276	$	8,866	$	8,518

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

	(dollars in millions)	2014			2013			2012
	Pratt & Whitney	$	3,126		$	3,559		$	3,718

	UTC Aerospace Systems	2,459			2,530			1,742

	Sikorsky	3,837			3,648			4,512

	Other	197			142			126

		$	9,619		$	9,879		$	10,098

Selected_Quarterly_Financial_D1

Selected Quarterly Financial Data - Unaudited (Tables)	12 Months Ended
	Dec. 31, 2014
Selected Quarterly Financial Information [Abstract]
Schedule Of Quarterly Financial Information [Table Text Block]	COMPARATIVE STOCK DATA (UNAUDITED)


		2014						2013
	(common stock)	High		Low		Dividend		High		Low		Dividend

	First quarter	$	118.31	$	107.91	$	0.59	$	93.59	$	83.55	$	0.535

	Second quarter	$	120.09	$	113.1	$	0.59	$	97.55	$	91.05	$	0.535

	Third quarter	$	115.93	$	103.79	$	0.59	$	112	$	93.8	$	0.535

	Fourth quarter	$	117.24	$	99.17	$	0.59	$	113.8	$	102.76	$	0.59

	SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)


		2014 Quarters								2013 Quarters
	(dollars in millions,	First		Second		Third		Fourth		First		Second		Third		Fourth
	except per share amounts)
	Net Sales	$	14,745	$	17,191	$	16,168	$	16,996	$	14,399	$	16,006	$	15,462	$	16,759

	Gross margin	4,055		4,260		4,702		4,636		3,934		4,454		4,442		4,475

	Net income attributable to common shareowners	1,213		1,680		1,854		1,473		1,266		1,560		1,432		1,463

	Earnings per share of Common Stock:
	Basic—net income	$	1.35	$	1.87	$	2.07	$	1.64	$	1.4	$	1.73	$	1.59	$	1.62

	Diluted—net income	$	1.32	$	1.84	$	2.04	$	1.62	$	1.39	$	1.71	$	1.57	$	1.6

Performance_Graph_Unaudited_Ta

Performance Graph - Unaudited (Tables)	12 Months Ended
	Dec. 31, 2014
Performance Graph [Abstract]
Cumulative Total Shareholder Return Table [Text Block]	COMPARISON OF CUMULATIVE FIVE YEAR TOTAL RETURN



		December
		2009		2010		2011		2012		2013		2014
	United Technologies Corporation	$	100	$	116.24	$	110.46	$	127.14	$	180.37	$	186.12

	S&P 500 Index	$	100	$	115.06	$	117.49	$	136.3	$	180.44	$	205.14

	Dow Jones Industrial Average	$	100	$	114.06	$	123.62	$	136.28	$	176.69	$	194.44

Schedule_II_Valuation_and_Qual2

Schedule II - Valuation and Qualifying Accounts (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance For Doubtful Accounts And Other Customer Financing Activity [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Provision charged to income	$93		$74	$72
Doubtful accounts written off (net)	-91		-68	-23
Other adjustments	-41		20	12
Balance December 31	504		543	517	456
Future Income Tax Benefits - Valuation Allowance
Valuation And Qualifying Accounts Disclosure [Line Items]
Other adjustments	-366	[1]	-56	-23
Additions charged to income tax expense	91		134	124
Additions charged to goodwill, due to acquisitions			12	71
Reductions credited to income tax expense	-55		-52	-245
Balance December 31	$612		$942	$904	$977

[1]	Note 1: Included in Other adjustments for the year ended December 31, 2014 are reductions in valuation allowances associated with an agreement with a state taxing authority for the monetization of tax credits.

Summary_of_Accounting_Principl2

Summary of Accounting Principles (Details) (USD $)	12 Months Ended
Summary of Accounting Principles (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Restricted Cash And Cash Equivalents	$255,000,000	$47,000,000
Contract Receivable Retainage	147,000,000	173,000,000
Research and Development Arrangement, Contract to Perform for Others, Compensation Earned	600,000,000
Unbilled Contracts Receivable	2,624,000,000	2,172,000,000
Excess Of Replacement Or Current Costs Over Stated LIFO Value	130,000,000	133,000,000
Research and Development Arrangement, Contract to Perform for Others, Costs Incurred, Gross	2,200,000,000
Collaboration Asset [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (in years)	30 years
Customer Relationships and Related Programs [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (in years)	32 years
Customer Relationships and Related Programs [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (in years)	2 years
Purchased Service Contracts [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (in years)	31 years
Purchased Service Contracts [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (in years)	5 years
Patents & trademarks [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (in years)	40 years
Patents & trademarks [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (in years)	3 years
Exclusivity Assets [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (in years)	25 years
Exclusivity Assets [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life (in years)	3 years
Commercial Aerospace [Member]
Accounting Policies [Abstract]
Unbilled Contracts Receivable	$823,000,000	$677,000,000

Summary_of_Accounting_Principl3

Summary of Accounting Principles (Long-Term Receivables) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Percentage Long Term Receivables High Credit Risk	8.00%	9.00%
Financing Receivable, net	$1,262	$1,297
Financing Receivable, Reserve for Credit Losses and Exposure, Individually Evaluated For Impairment	10	49
Long-term Trade Accounts Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, net	838	714
Notes and Leases Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, net	$424	$583

Summary_of_Accounting_Principl4

Summary of Accounting Principles (Collaborative Arrangements) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaborators interests existing programs low end	14.00%
Collaborators interests existing programs high end	49.00%
Partner share individual program maximum	31.00%
Research and Development Expense [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaborator Share Of Program Costs Amount	($122)	($194)	($203)
Cost of Goods Sold [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaborator Share Of Revenues Amount	1,778	1,820	1,295
Collaborator Share Of Program Costs Amount	-103	-127	-97
Cost of Services [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaborator Share Of Revenues Amount	354	273	216
Selling General and Administrative [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaborator Share Of Program Costs Amount	($4)	($5)	($7)

Summary_of_Accounting_Principl5

Summary of Accounting Principles Summary of Accounting Principles (Revenue Recognition) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Contract Estimate Adjustment [Line Items]
Increase Decrease Operating Profit Due to Contract Reestimates	($240)
Sikorsky [Member]
Contract Estimate Adjustment [Line Items]
Increase Decrease Operating Profit Due to Contract Reestimates	($438)

Business_Acquisitions_Disposit2

Business Acquisitions, Dispositions, Goodwill and Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Acquisition Cost Of Acquired Entities and Interest in Affiliates	$530,000,000	$151,000,000	$18,600,000,000
Noncash Or Part Noncash Acquisition Debt Assumed1	128,000,000		2,600,000,000
Contractual Obligation, Fiscal Year Maturity [Abstract]
Equity Method Investment, Other than Temporary Impairment		25,000,000
Amortization of Intangible Assets	718,000,000	710,000,000	547,000,000
Asia Joint Venture [Member]
Limited Liability Company or Limited Partnership [Line Items]
Gain Recognized On Limited Liability Company Or Limited Partnership Formation			215,000,000
Canadian Distribution Business [Member]
Limited Liability Company or Limited Partnership [Line Items]
Gain Recognized On Limited Liability Company Or Limited Partnership Formation			120,000,000
PrattAndWhitneyPowerSystems [Member]
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses		432,000,000
Business Combination, Contingent Consideration, Asset		200,000,000
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax		193,000,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax		132,000,000
Group Ascensores Enor SA [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired		240,000,000
UTC Climate, Controls and Security [Member]
Business Acquisition [Line Items]
Gain (Loss) on Disposition of Business	30,000,000	55,000,000
Contractual Obligation, Fiscal Year Maturity [Abstract]
Equity Method Investment, Other than Temporary Impairment			180,000,000
Goodrich Corporation [Member]
Business Acquisition [Line Items]
Business Acquisition Cost Of Acquired Entity, Purchase Price			18,300,000,000
Noncash Or Part Noncash Acquisition Net Debt Assumed			1,900,000,000
Cash and Cash equivalents used in business acquisition			10,900,000,000
Contractual Obligation, Fiscal Year Maturity [Abstract]
Contractual Obligation			2,200,000,000
Contractual Obligation, Consumed in Current Year	249,000,000	278,000,000
Contractual Obligation, Due in Next Twelve Months	229,000,000
Contractual Obligation, Due in Second Year	240,000,000
Contractual Obligation, Due in Third Year	259,000,000
Contractual Obligation, Due in Fourth Year	209,000,000
Contractual Obligation, Due in Fifth Year	192,000,000
Contractual Obligation, Due after Fifth Year	480,000,000
International Aero Engines AG [Member]
Business Acquisition [Line Items]
Business Acquisition Cost Of Acquired Entity, Purchase Price			$1,500,000,000

Business_Acquisitions_Disposit3

Business Acquisitions, Dispositions, Goodwill and Intangible Assets(Consideration Transferred Information) (Details) (Goodrich Corporation [Member], USD $)	12 Months Ended
In Billions, unless otherwise specified	Dec. 31, 2012
Goodrich Corporation [Member]
Business Acquisition [Line Items]
Business Combination, Goodwill Recognized, Description	11.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	$10.10
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets, Customer Relationships	$8.60

Business_Acquisitions_Disposit4

Business Acquisitions, Dispositions, Goodwill and Intangible Assets(IAE Collaboration) (Details)	12 Months Ended
	Dec. 31, 2014
IAE Collaboration [Member]
Schedule of Equity Method Investments [Line Items]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	61.00%
International Aero Engines AG [Member]
Schedule of Equity Method Investments [Line Items]
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	49.50%

Business_Acquisitions_Disposit5

Business Acquisitions, Dispositions, Goodwill and Intangible Assets(Variable Interest Entity) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Variable Interest Entity [Line Items]
Current Assets	1,820	$1,616
Noncurrent Assets	756	1,066
Total Assets	2,576	2,682
Current Liabilities	1,795	1,895
Noncurrent Liabilities	1,227	1,085
Total Liabilities	3,022	$2,980
International Aero Engines AG [Member]
Variable Interest Entity [Line Items]
Business Acquisition, Effective Date of Acquisition	29-Jun-12

Business_Acquisitions_Disposit6

Business Acquisitions, Dispositions, Goodwill and Intangible Assets (Goodwill) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Line Items]
Goodwill	$27,796	$28,168
Goodwill resulting from business combinations	256
Goodwill, foreign currency translation and other	-628
Otis [Member]
Goodwill [Line Items]
Goodwill	1,664	1,741
Goodwill resulting from business combinations	35
Goodwill, foreign currency translation and other	-112
UTC Climate, Controls and Security [Member]
Goodwill [Line Items]
Goodwill	9,408	9,727
Goodwill resulting from business combinations	13
Goodwill, foreign currency translation and other	-332
Pratt and Whitney [Member]
Goodwill [Line Items]
Goodwill	1,481	1,273
Goodwill resulting from business combinations	208
Goodwill, foreign currency translation and other	0
UTC Aerospace Systems [Member]
Goodwill [Line Items]
Goodwill	14,892	15,069
Goodwill resulting from business combinations	0
Goodwill, foreign currency translation and other	-177
Sikorsky [Member]
Goodwill [Line Items]
Goodwill	347	353
Goodwill resulting from business combinations	0
Goodwill, foreign currency translation and other	-6
Eliminations and other [Member]
Goodwill [Line Items]
Goodwill	4	5
Goodwill resulting from business combinations	0
Goodwill, foreign currency translation and other	-1
Total Segments [Member]
Goodwill [Line Items]
Goodwill	27,792	28,163
Goodwill resulting from business combinations	256
Goodwill, foreign currency translation and other	($627)

Business_Acquisitions_Disposit7

Business Acquisitions, Dispositions, Goodwill and Intangible Assets (Intangible Assets) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Trademarks and other	$2,177	$2,260
Total	19,702	19,196
Finite-Lived Intangible Assets [Line Items]
Gross Amount	17,525	16,936
Accumulated Amortization	-4,142	-3,675
Service Portfolios [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	2,103	2,234
Accumulated Amortization	-1,309	-1,295
Patents and trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	361	380
Accumulated Amortization	-190	-181
IAE Collaboration [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	2,872	2,273
Accumulated Amortization	-20	0
Customer Relationships and Other
Finite-Lived Intangible Assets [Line Items]
Gross Amount	12,189	12,049
Accumulated Amortization	($2,623)	($2,199)

Business_Acquisitions_Disposit8

Business Acquisitions, Dispositions, Goodwill and Intangible Assets (Amortization Expense) (Details) (USD $)	Sep. 30, 2014
In Millions, unless otherwise specified	Sep. 30, 2014
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization Expense, Year 1	$707
Amortization Expense, Year 2	715
Amortization Expense, Year 3	764
Amortization Expense, Year 4	828
Amortization Expense, Year 5	$806

Discontinued_Operations_Narrat

Discontinued Operations (Narrative) (Details)	12 Months Ended
Discontinued Operations (Narrative) (Details)	Dec. 31, 2014	Dec. 31, 2013
Pratt and Whitney Rocketdyne [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Acquisitions and Disposals, Date of Transaction for Acquisition or Disposal	14-Jun-13
UTC Power [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Acquisitions and Disposals, Date of Transaction for Acquisition or Disposal	12-Feb-13
Hamilton Sundtrand Industrials [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Acquisitions and Disposals, Date of Transaction for Acquisition or Disposal		13-Dec-12
Clipper Windpower [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Acquisitions and Disposals, Date of Transaction for Acquisition or Disposal		7-Aug-12

Discontinued_Operations_Income

Discontinued Operations (Income Statement Information) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Net Sales		$309
Income from operations	0	63	-998
Income Tax Expense		-32
Income from operations, net of income taxes		31
Loss on disposal	0	-33	2,030
Income tax benefit		37
Net income from discontinued operations	$0	$35	$290

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Document Fiscal Year Focus									2014
Net income from continuing operations									$6,220	$5,686	$4,847
Net income from discontinued operations									0	35	283
Net income attributable to common shareowners	$1,473	$1,854	$1,680	$1,213	$1,463	$1,432	$1,560	$1,266	$6,220	$5,721	$5,130
Basic weighted average number of shares outstanding									898,300,000	901,000,000	895,200,000
Stock Awards									13,300,000	14,100,000	11,400,000
Diluted weighted average number of shares outstanding									911,600,000	915,100,000	906,600,000
Net income from continuing operations									$6.92	$6.31	$5.41
Net income from discontinued operations									$0	$0.04	$0.32
Net income attributable to common shareowners	$1.64	$2.07	$1.87	$1.35	$1.62	$1.59	$1.73	$1.40	$6.92	$6.35	$5.73
Net income from continuing operations									$6.82	$6.21	$5.35
Net income from discontinued operations									$0	$0.04	$0.31
Net income attributable to common shareowners	$1.62	$2.04	$1.84	$1.32	$1.60	$1.57	$1.71	$1.39	$6.82	$6.25	$5.66
Outstanding stock awards excluded from the computation of diluted earnings per share									3,500,000	0	4,700,000

Commercial_Aerospace_Industry_2

Commercial Aerospace Industry Assets and Commitments (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts Notes And Loans Receivable [Line Items]
Unbilled Contracts Receivable	$2,624,000,000	$2,172,000,000
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset	11,300,000,000
Commercial Aerospace [Member]
Accounts Notes And Loans Receivable [Line Items]
Guarantee Obligations Maximum Exposure	632,000,000	615,000,000
Commercial Aerospace [Member]
Accounts Notes And Loans Receivable [Line Items]
Accounts, Notes, Loans and Financing Receivable, gross	5,573,000,000	6,193,000,000
Products Under Lease	583,000,000	662,000,000
Notes and leases receivable, total committed	424,000,000	586,000,000
Notes and leases receivable within one year	43,000,000
Notes and leases receivable within two years	103,000,000
Notes and leases receivable within three years	42,000,000
Notes and leases receivable within four years	26,000,000
Notes and leases receivable within five years	25,000,000
Notes and leases receivable after five years	185,000,000
Commercial aerospace financing commitments, total committed	3,152,000,000
Commercial aerospace financing commitments within one year	574,000,000
Commercial aerospace financing commitments within two years	489,000,000
Commercial aerospace financing commitments within three years	363,000,000
Commercial aerospace financing commitments within four years	449,000,000
Commercial aerospace financing commitments within five years	375,000,000
Commercial aerospace financing commitments after five years	902,000,000
Deferred Revenues Long Term Aftermarket Maintenance Contract	3,553,000,000	3,230,000,000
Allowance For Accounts Notes Receivable	243,000,000	243,000,000
Guarantee Obligations And Rental Commitments Current Carrying Value	67,000,000	76,000,000
Other commercial aerospace commitments, total committed	8,165,000,000
Other commercial aerospace commitments within one year	763,000,000
Other commercial aerospace commitments within two years	858,000,000
Other commercial aerospace commitments within three years	948,000,000
Other commercial aerospace commitments within four years	899,000,000
Other commercial aerospace commitments within five years	774,000,000
Other commercial aerospace commitments after five years	3,923,000,000
Collaboration partners' share, total committed	-2,840,000,000
Collaboration partners' share within one year	-370,000,000
Collaboration partners' share within two years	-381,000,000
Collaboration partners' share within three years	-383,000,000
Collaboration partners' share within four years	-380,000,000
Collaboration partners' share within five years	-296,000,000
Collaboration partners' share after five years	-1,030,000,000
Total commercial commitments, total committed	8,477,000,000
Total commercial commitments within one year	967,000,000
Total commercial commitments within two years	966,000,000
Total commercial commitments within three years	928,000,000
Total commercial commitments within four years	968,000,000
Total commercial commitments within five years	853,000,000
Total commercial commitments after five years	3,795,000,000
International Aero Engines AG [Member]
Accounts Notes And Loans Receivable [Line Items]
Business Acquisition Cost Of Acquired Entity, Purchase Price			1,500,000,000
Commercial Aerospace [Member]
Accounts Notes And Loans Receivable [Line Items]
Unbilled Contracts Receivable	$823,000,000	$677,000,000

Inventories_and_Contracts_in_P2

Inventories and Contracts in Progress (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014
Inventory [Line Items]
Raw materials	$2,056,000,000	$1,983,000,000
Work-in-process	3,596,000,000	4,600,000,000
Finished goods	3,776,000,000	3,360,000,000
Contracts in progress	8,189,000,000	7,929,000,000
Inventories before payments and billings	17,617,000,000	17,872,000,000
Progress payments, secured by lien, on U.S. Government contracts Netted Against Inventory For Long Term US Government Contracts Or Programs	-300,000,000	-279,000,000
Billings on contracts in progress	-7,452,000,000	-7,263,000,000
Inventories and contracts in progress, net	9,865,000,000	10,330,000,000
Inventory Valuation Reserves	863,000,000	1,025,000,000
Percentage Of Inventory For Long Term Contracts Or Programs	69.00%	69.00%
Sikorsky [Member]
Inventory [Line Items]
Inventory Adjustments			1,300,000,000
Capitalized research and development costs included in inventory		740,000,000
UTC Aerospace Systems [Member]
Inventory [Line Items]
Capitalized research and development costs included in inventory	$141,000,000	$159,000,000

Fixed_Assets_Details

Fixed Assets (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Land	$408	$434
Buildings and improvements	5,697	5,633
Machinery, tools and equipment	12,375	11,353
Other, including assets under construction	1,284	1,241
Fixed assets	19,764	18,661
Accumulated depreciation	-10,488	-9,795
Fixed assets, net	9,276	8,866
Property Plant And Equipment [Line Items]
Depreciation	$1,122	$1,050	$920
Land Buildings And Improvements [Member] \| Maximum [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Land Buildings And Improvements [Member] \| Minimum [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	12 years
Machinery And Equipment [Member] \| Maximum [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Machinery And Equipment [Member] \| Minimum [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years

Accrued_Liabilities_Details

Accrued Liabilities (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Advances on sales contracts and service billings	$5,262	$6,444
Accrued salaries, wages and employee benefits	1,909	1,901
Service and warranty accruals	533	505
Litigation and contract matters	505	526
Interest payable	503	481
Income taxes payable	309	540
Accrued property, sales and use taxes	285	280
Accrued workers compensation	275	218
Accrued restructuring costs	264	337
Other	4,161	4,103
Accrued liabilities	14,006	15,335
Sikorsky [Member]
Advances on sales contracts and service billings	$700

Borrowings_and_Lines_of_Credit2

Borrowings and Lines of Credit (Short-Term Borrowings) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Short-term Debt [Line Items]
Document Fiscal Year Focus	2014
Commercial Paper	$0	$200
Other borrowings	126	188
Total short-term borrowings	$126	$388

Borrowings_and_Lines_of_Credit3

Borrowings and Lines of Credit (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Debt Disclosure [Abstract]
Aggregate Line of Credit Facility Maximum Borrowing Capacity	$4,350,000,000
Maximum Commercial Paper Borrowing Authority	4,350,000,000
Short Term Debt Weighted Average Interest Rate	5.70%	1.80%
Short Term Line of Credit Facilities Remaining Borrowing Capacities	816,000,000
Multicurrency Revolving Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amount Outstanding	0
Line of Credit Facility, Expiration Date	23-May-19
Line of Credit Facility, Maximum Borrowing Capacity	2,150,000,000
Revolving Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amount Outstanding	0
Line of Credit Facility, Expiration Date	23-May-19
Line of Credit Facility, Maximum Borrowing Capacity	$2,200,000,000

Borrowings_and_Lines_of_Credit4

Borrowings and Lines of Credit (Long-Term Debt) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Debt Instrument [Line Items]
Document Fiscal Year Focus	2014
Debt Instrument, London Interbank Offered Rate	0.20%
Extinguishment Of Debt, Amount			$1,698,000,000
Loss on Extinguishment of Debt			-23,000,000
Project financing obligations	147,000,000		86,000,000
Total principal long-term debt	19,500,000,000		19,643,000,000
Other long-term debt (including capitalized leases)â€¡	378,000,000	[1]	394,000,000	[1]
Other long-term debt (fair market value adjustments and discounts)â€¡	168,000,000	[1]	210,000,000	[1]
Total long-term debt	19,668,000,000		19,853,000,000
Less: current portion	1,796,000,000		112,000,000
Debt Percentage Bearing Variable Interest Rate	4.00%		5.00%
Long Term Debt Maturities Repayments Of Principal In Next Twelve Months	1,796,000,000
Long Term Debt Maturities Repayments Of Principal In Year Two	110,000,000
Long Term Debt Maturities Repayments Of Principal In Year Three	2,518,000,000
Long Term Debt Maturities Repayments Of Principal In Year Four	118,000,000
Long Term Debt Maturities Repayments Of Principal In Year Five	1,570,000,000
Long Term Debt Maturities Repayments Of Principal After Year Five	13,388,000,000
Multicurrency Revolving Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date	23-May-19
Revolving Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date	23-May-19
April 2014 Redemption Call [Member] [Domain]
Debt Instrument [Line Items]
Extinguishment Of Debt, Amount	188,000,000
Extinguishment of Debt, Announcement Date	28-Feb-14
Extinguishment of Debt, Payment Date	1-Apr-14
LIBOR plus 0.500% floating rate notes due 2015
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	500,000,000	[2]	500,000,000	[2]
Debt Instrument, Maturity Year Date	2015
Debt Instrument, Call Feature	The three-month LIBOR rate as of DecemberÂ 31,Â 2014 was approximately 0.2%
Debt Instrument, Interest Rate Terms	LIBOR plus 0.500%
Notes 4.875% Due 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,200,000,000	[3]	1,200,000,000	[3]
Debt Instrument, Interest Rate, Stated Percentage	4.88%
Debt Instrument, Maturity Year Date	2015
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.
Notes 6.290% Due 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	0	[1]	188,000,000	[1]
Debt Instrument, Interest Rate, Stated Percentage	6.29%
Debt Instrument, Maturity Year Date	2016
Debt Instrument, Call Feature	Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on JulyÂ 26, 2012.
Notes 5.375% Due 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,000,000,000	[3]	1,000,000,000	[3]
Debt Instrument, Interest Rate, Stated Percentage	5.38%
Debt Instrument, Maturity Year Date	2017
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.
Notes 1.800% Due 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,500,000,000	[3]	1,500,000,000	[3]
Debt Instrument, Interest Rate, Stated Percentage	1.80%
Debt Instrument, Maturity Year Date	2017
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.
Notes 6.800% Due 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	99,000,000	[1]	99,000,000	[1]
Debt Instrument, Interest Rate, Stated Percentage	6.80%
Debt Instrument, Maturity Year Date	2018
Debt Instrument, Call Feature	Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on JulyÂ 26, 2012.
Notes 6.125% Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,250,000,000	[3]	1,250,000,000	[3]
Debt Instrument, Interest Rate, Stated Percentage	6.13%
Debt Instrument, Maturity Year Date	2019
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.
Notes 8.875% Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	271,000,000		271,000,000
Debt Instrument, Interest Rate, Stated Percentage	8.88%
Debt Instrument, Maturity Year Date	2019
Notes 4.500% Due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,250,000,000	[3]	1,250,000,000	[3]
Debt Instrument, Interest Rate, Stated Percentage	4.50%
Debt Instrument, Maturity Year Date	2020
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.
Notes 4.875% Due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	171,000,000	[1]	171,000,000	[1]
Debt Instrument, Interest Rate, Stated Percentage	4.88%
Debt Instrument, Maturity Year Date	2020
Debt Instrument, Call Feature	Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on JulyÂ 26, 2012.
Notes 8.750% Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	250,000,000		250,000,000
Debt Instrument, Interest Rate, Stated Percentage	8.75%
Debt Instrument, Maturity Year Date	2021
Notes 3.100% Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	2,300,000,000	[3]	2,300,000,000	[3]
Debt Instrument, Interest Rate, Stated Percentage	3.10%
Debt Instrument, Maturity Year Date	2022
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.
Junior Subordinated Notes 1.550% Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,100,000,000	[4]	1,100,000,000	[4]
Debt Instrument, Interest Rate, Stated Percentage	1.55%
Debt Instrument, Maturity Year Date	2022
Debt Instrument, Call Feature	The junior subordinated notes are redeemable at our option, in whole or in part, on a date not earlier than AugustÂ 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 AprilÂ 29, 2015 and JulyÂ 15, 2015 or between JulyÂ 23, 2015 and JulyÂ 29, 2015.
Notes 7.100% Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	141,000,000	[1]	141,000,000	[1]
Debt Instrument, Interest Rate, Stated Percentage	7.10%
Debt Instrument, Maturity Year Date	2027
Debt Instrument, Call Feature	Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on JulyÂ 26, 2012.
Notes 6.700% Due 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	400,000,000		400,000,000
Debt Instrument, Interest Rate, Stated Percentage	6.70%
Debt Instrument, Maturity Year Date	2028
Notes 7.500% Due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	550,000,000	[3]	550,000,000	[3]
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Debt Instrument, Maturity Year Date	2029
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.
Notes 5.400% Due 2035 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	600,000,000	[3]	600,000,000	[3]
Debt Instrument, Interest Rate, Stated Percentage	5.40%
Debt Instrument, Maturity Year Date	2035
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.
Notes 6.050% Due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	600,000,000	[3]	600,000,000	[3]
Debt Instrument, Interest Rate, Stated Percentage	6.05%
Debt Instrument, Maturity Year Date	2036
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.
Notes 6.800% Due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	134,000,000	[1]	134,000,000	[1]
Debt Instrument, Interest Rate, Stated Percentage	6.80%
Debt Instrument, Maturity Year Date	2036
Debt Instrument, Call Feature	Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on JulyÂ 26, 2012.
Notes 7.000% Due 2038 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	159,000,000	[1]	159,000,000	[1]
Debt Instrument, Interest Rate, Stated Percentage	7.00%
Debt Instrument, Maturity Year Date	2038
Debt Instrument, Call Feature	Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on JulyÂ 26, 2012.
Notes 6.125% Due 2038 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,000,000,000	[3]	1,000,000,000	[3]
Debt Instrument, Interest Rate, Stated Percentage	6.13%
Debt Instrument, Maturity Year Date	2038
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.
Notes 5.700% Due 2040 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,000,000,000	[3]	1,000,000,000	[3]
Debt Instrument, Interest Rate, Stated Percentage	5.70%
Debt Instrument, Maturity Year Date	2040
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.
Notes 4.500% Due 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	$3,500,000,000	[3]	$3,500,000,000	[3]
Debt Instrument, Interest Rate, Stated Percentage	4.50%
Debt Instrument, Maturity Year Date	2042
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.

[1]	Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on JulyÂ 26, 2012.
[2]	The three-month LIBOR rate as of DecemberÂ 31,Â 2014 was approximately 0.2%.
[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 AugustÂ 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 AprilÂ 29, 2015 and JulyÂ 15, 2015 or between JulyÂ 23, 2015 and JulyÂ 29, 2015.

Equity_Reclass_and_Changes_in_

Equity (Reclass and Changes in Accumulated Other Comprehensive Income) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance at December 31	($6,661)	($2,880)	($5,448)
Other comprehensive (loss) income before reclassifications, net	-4,113	2,008
Amounts reclassified, pretax	499	863
Tax (benefit) expense reclassified	-167	-303
Foreign Currency Translation
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance at December 31	-1,051	170	654
Other comprehensive (loss) income before reclassifications, net	-1,228	-509
Amounts reclassified, pretax	7	25
Tax (benefit) expense reclassified	0	0
Defined Benefit Pension and Post-retirement Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance at December 31	-5,709	-3,267	-6,250
Other comprehensive (loss) income before reclassifications, net	-2,708	2,409
Amounts reclassified, pretax	416	906
Tax (benefit) expense reclassified	-150	-332
Unrealized Gains (Losses) on Available-for-Sale Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance at December 31	308	296	145
Other comprehensive (loss) income before reclassifications, net	28	208
Amounts reclassified, pretax	-20	-91
Tax (benefit) expense reclassified	4	34
Unrealized Hedging (Losses) Gains
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance at December 31	-209	-79	3
Other comprehensive (loss) income before reclassifications, net	-205	-100
Amounts reclassified, pretax	96	23
Tax (benefit) expense reclassified	($21)	($5)

Equity_Changes_in_Noncontrolli

Equity (Changes in Noncontrolling Interests) (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Net [Abstract]
Net income attributable to common shareowners	$1,473	$1,854	$1,680	$1,213	$1,463	$1,432	$1,560	$1,266	$6,220	$5,721	$5,130
Increase in common stock for sale of subsidiary shares									4	0	0
Decrease in common stock for purchase of subsidiary shares									-75	-49	-34
Net income attributable to common shareowners after transfers to noncontrolling interests									$6,149	$5,672	$5,096

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended			12 Months Ended
Income Taxes (Details) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Contingency [Line Items]
Other Information Pertaining To Income Taxes, Monetary					$95,000,000
Reduction In Tax Expense Refund Claim						237,000,000
Income, United States				4,270,000,000	3,658,000,000	2,595,000,000
Income, Foreign				4,617,000,000	4,654,000,000	4,316,000,000
Income from continuing operations before income taxes				8,887,000,000	8,312,000,000	6,911,000,000
Undistributed Earnings of Foreign Subsidiaries	28,000,000,000			28,000,000,000
Current Tax Provision, Federal				349,000,000	616,000,000	403,000,000
Current Tax Provision, State				47,000,000	55,000,000	9,000,000
Current Tax Provision, Foreign				1,492,000,000	1,325,000,000	1,179,000,000
Current Income Tax Expense Benefit				1,888,000,000	1,996,000,000	1,591,000,000
Future Tax Provision, Federal				408,000,000	262,000,000	335,000,000
Future Tax Provision, State				-39,000,000	36,000,000	111,000,000
Future Tax Provision, Foreign				7,000,000	-56,000,000	-326,000,000
Deferred income tax provision				376,000,000	242,000,000	120,000,000
Income tax expense				2,264,000,000	2,238,000,000	1,711,000,000
Attributable to items credited (charged) to equity and goodwill				1,535,000,000	-1,661,000,000	297,000,000
Statutory U.S. federal income tax rate				35.00%	35.00%	35.00%
Tax on international activities				-3.40%	-5.80%	-6.40%
Tax audit settlements				-4.20%	-0.40%	-3.40%
Other				-1.90%	-1.90%	-0.40%
Effective income tax rate				25.50%	26.90%	24.80%
Tax Adjustments Settlements And Unusual Provisions					35,000,000	203,000,000
Valuation Allowances and Reserves, Adjustments						225,000,000
Income Tax Credits and Adjustments					24,000,000
Tax Settlement Interest Gain (Loss)		23,000,000	21,000,000
Tax Settlement Interest Gain (Loss) Noncash	93,000,000
Tax Settlement Gain (Loss) Noncash		141,000,000	274,000,000
Resolution of disputed tax matters Tax Years 2004 â€“ 2005 [Member]
Income Tax Contingency [Line Items]
Other Information Pertaining To Income Taxes, Monetary						34,000,000
2009 - 2010 Tax Years [Member]
Income Tax Contingency [Line Items]
Other Information Pertaining To Income Taxes, Monetary				213,000,000
2006 - 2008 Tax Years [Member]
Income Tax Contingency [Line Items]
Other Information Pertaining To Income Taxes, Monetary				84,000,000
2010 - 2012 Tax Years [Member]
Income Tax Contingency [Line Items]
Other Information Pertaining To Income Taxes, Monetary				40,000,000
Canada Revenue Agencyâ€™s Examination Research Credit 2006-2012 [Member]
Income Tax Contingency [Line Items]
Other Information Pertaining To Income Taxes, Monetary				34,000,000
Dividend Repatriation [Member]
Income Tax Contingency [Line Items]
Other Information Pertaining To Income Taxes, Monetary				175,000,000
1998 Reorganization Otis Germany [Member]
Income Tax Contingency [Line Items]
Other Information Pertaining To Income Taxes, Monetary				265,000,000
Internal Revenue Service (IRS) [Member] \| Tax Year 2005 [Member] [Domain]
Income Tax Contingency [Line Items]
Tax Adjustments Settlements And Unusual Provisions					34,000,000
Internal Revenue Service (IRS) [Member] \| Tax Years 2001 and 2002 [Domain]
Income Tax Contingency [Line Items]
Tax Adjustments Settlements And Unusual Provisions					25,000,000
Tax Settlement Interest Gain (Loss)					12,000,000
Internal Revenue Service (IRS) [Member] \| 2009 - 2010 Tax Years [Member]
Income Tax Contingency [Line Items]
Tax Adjustments Settlements And Unusual Provisions					24,000,000
Tax Settlement Interest Gain (Loss)					$2,000,000

Income_Taxes_Tax_Carryforwards

Income Taxes (Tax Carryforwards) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2014
Tax Credit Carryforward [Line Items]
Future Benefits, Insurance and employee benefits	$747	$1,122
Future Benefits, Other Information Pertaining To Income Taxes, Monetary	95
Future Benefits, Other asset basis differences	365	369
Future Benefits, Other liability basis differences	1,187	1,039
Future Benefits, Tax loss carryforwards	386	418
Future Benefits, Tax credit carryforwards	1,184	905
Future Benefits, Valuation allowances	-669	-428
Deferred Tax Assets, Net of Valuation Allowance	3,200	3,425
Future Payables, Insurance and employee benefits	-992	-1,911
Deferred Tax Liabilities Other Asset Basis Difference	4,649	4,584
Deferred Tax Liabilities, Other	-178	-124
Future Payables, Tax loss carryforwards	-346	-242
Future payables, Tax credit carryforwards	-68	-58
Future Payables, Valuation Allowance	273	184
Deferred Tax Liabilities, net of valuation allowances	3,338	2,433
Operating Loss Carryforwards		3,641
Tax Credit Carryforward Amount		963
2009 - 2010 Tax Years [Member]
Tax Credit Carryforward [Line Items]
Future Benefits, Other Information Pertaining To Income Taxes, Monetary		213
Expiration Period Current To Five Years [Member]
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		555
Tax Credit Carryforward Amount		29
Expiration Period Six To Ten Years [Member]
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		242
Tax Credit Carryforward Amount		10
Expiration Period Eleven To Twenty Years [Member]
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		726
Tax Credit Carryforward Amount		243
Expiration Period Indefinite [Member]
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards		2,118
Tax Credit Carryforward Amount		$681

Income_Taxes_Unrecognized_Tax_

Income Taxes (Unrecognized Tax Benefits) (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Examination [Line Items]
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions			$164	$113	$232
Tax Settlement Gain (Loss) Noncash	141	274
Tax Settlement Interest Gain (Loss)	23	21
Tax Adjustments Settlements And Unusual Provisions				35	203
Estimated Tax Settlement Interest Gain (Loss) Noncash, Range, Lower Limit		220
Unrecognized Tax Benefits, Beginning Balance			1,223	1,073	946
Unrecognized Tax Benefits That Would Impact Effective Tax Rate			1,002
Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions, Uncertain Timing			87
Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions			435	211	221
Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations			-47	-41	-21
Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities			-686	-133	-305
Unrecognized Tax Benefits, Ending Balance			1,089	1,223	1,073
Unrecognized Tax Benefits Interest On Income Taxes Expense			180	51	40
Unrecognized Tax Benefits Interest On Income Taxes Accrued			292	262	270
Reduction In Tax Expense Refund Claim					237
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Estimated Range Of Change, Lower Bound			95
Significant Change in Unrecognized Tax Benefits is Reasonably Possible Estimated Range of Change, Upper Bound			$445

Employee_Benefit_Plans_Defined

Employee Benefit Plans (Defined Benefit Pension Plans) (Details) (USD $)	12 Months Ended
Share data in Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Pension Payout Program, Voluntary Lump-Sum Value	$50,000
Defined Benefit Plan, Settlements, Benefit Obligation	311,000,000
Defined Benefit Plan, Settlements, Benefit Obligation following year	147,000,000
Percentage Of Projected Benefit Obligation Comprised Of Foreign Plan Benefits	23.00%
Other Comprehensive Loss (Income), Pension and Other Postretirement Benefit Plans, Net Unamortized Loss (Gain) Arising During Period, before Tax	-4,362,000,000		3,987,000,000		-1,542,000,000
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Arising During Period, before Tax	-5,000,000		-225,000,000		211,000,000
Defined Contribution Plan, Cost Recognized	330,000,000		335,000,000		256,000,000
Employee Stock Ownership Plan (ESOP), Number of Allocated Shares	29.9
Employee Stock Ownership Plan (ESOP), Number of Suspense Shares	14.2
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Projected Benefit Obligation	34,261,000,000		22,142,000,000
Employee Stock Ownership Plan (ESOP), Deferred Shares, Fair Value	1,600,000,000
Defined Benefit Plan, Accumulated Benefit Obligation	36,900,000,000		31,900,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	31,355,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	32,738,000,000		31,355,000,000
Pension And Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	-6,683,000,000		-3,444,000,000
Projected Benefit Obligation Reduction Due To Plan Change						623,000,000
Reduction in projected benefit obligation due to plan change in 2012 related to Goodrich acquisition					204,000,000
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, before Tax	416,000,000		906,000,000		689,000,000
Discontinued Operations Defined Benefit Plan Recognized Net Gain Loss Due to Settlements and Curtailments			-24,000,000
Range of Growth Seeking Assets in Company's Overall Investment Strategy	55% to 65%
Range of Income Generating Assets in Company's Overall Investment Strategy	35% to 45%
Percentage Of Enhanced Equity Assets In Global Equity Portfolio	10.00%
Pecentage Of Interest Rate Sensitivity Of Pension Plan Liabilities Fixed Income Portfolio Designed To Hedge	35% to 45%
Defined Benefit Plan Common Stock Funded Percentage	3.00%		0.00%
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	350,000,000
Domestic Defined Benefit Plan Cash Contributions By Employer	200,000,000		0
Foreign Defined Benefit Plan Cash Contributions By Employer	317,000,000		108,000,000
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation	33,495,000,000		21,475,000,000
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets	28,478,000,000		19,884,000,000
Quoted price in active markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	7,575,000,000		7,527,000,000
Significant other observable inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	20,573,000,000		19,301,000,000
Unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	3,935,000,000		3,710,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	4,147,000,000		3,935,000,000
Defined Benefit Plan Actual Return On Plan Assets Sold During Period	303,000,000		215,000,000
Defined Benefit Plan Actual Return On Plan Assets Still Held	34,000,000		145,000,000
Defined Benefit Plan Purchases Sales And Settlements	-125,000,000		-135,000,000
Global Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	6,571,000,000		6,841,000,000
Global Equities [Member] \| Quoted price in active markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	6,569,000,000		6,840,000,000
Global Equities [Member] \| Significant other observable inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	2,000,000		1,000,000
Global Equities [Member] \| Unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0		0
Global Equity Commingled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	5,431,000,000	[1]	4,881,000,000	[1]
Global Equity Commingled Funds [Member] \| Quoted price in active markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0	[1]	0	[1]
Global Equity Commingled Funds [Member] \| Significant other observable inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	5,431,000,000	[1]	4,881,000,000	[1]
Global Equity Commingled Funds [Member] \| Unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0	[1]	0	[1]
Enhanced Global Equities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	3,008,000,000	[2]	3,002,000,000	[2]
Enhanced Global Equities [Member] \| Quoted price in active markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	292,000,000	[2]	261,000,000	[2]
Enhanced Global Equities [Member] \| Significant other observable inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	2,191,000,000	[2]	2,241,000,000	[2]
Enhanced Global Equities [Member] \| Unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	500,000,000	[2]	447,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	525,000,000	[2]	500,000,000	[2]
Defined Benefit Plan Actual Return On Plan Assets Sold During Period	35,000,000		0
Defined Benefit Plan Actual Return On Plan Assets Still Held	-23,000,000		50,000,000
Defined Benefit Plan Purchases Sales And Settlements	13,000,000		3,000,000
Private Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	1,400,000,000	[3]	1,339,000,000	[3]
Private Equity Funds [Member] \| Quoted price in active markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0	[3]	0	[3]
Private Equity Funds [Member] \| Significant other observable inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0	[3]	0	[3]
Private Equity Funds [Member] \| Unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	1,339,000,000	[3]	1,202,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	1,400,000,000	[3]	1,339,000,000	[3]
Defined Benefit Plan Actual Return On Plan Assets Sold During Period	257,000,000		195,000,000
Defined Benefit Plan Actual Return On Plan Assets Still Held	-23,000,000		-9,000,000
Defined Benefit Plan Purchases Sales And Settlements	-173,000,000		-49,000,000
US Treasury And Government [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	1,641,000,000		1,731,000,000
US Treasury And Government [Member] \| Quoted price in active markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	509,000,000		424,000,000
US Treasury And Government [Member] \| Significant other observable inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	1,132,000,000		1,307,000,000
US Treasury And Government [Member] \| Unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0		0
Corporate Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	9,503,000,000		8,757,000,000
Corporate Debt Securities [Member] \| Quoted price in active markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	4,000,000		0
Corporate Debt Securities [Member] \| Significant other observable inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	9,190,000,000		8,461,000,000
Corporate Debt Securities [Member] \| Unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	296,000,000		276,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	309,000,000		296,000,000
Defined Benefit Plan Actual Return On Plan Assets Sold During Period	0		0
Defined Benefit Plan Actual Return On Plan Assets Still Held	1,000,000		2,000,000
Defined Benefit Plan Purchases Sales And Settlements	12,000,000		18,000,000
Asset Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	124,000,000	[4]	80,000,000	[4]
Asset Backed Securities [Member] \| Quoted price in active markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0	[4]	0	[4]
Asset Backed Securities [Member] \| Significant other observable inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	124,000,000	[4]	80,000,000	[4]
Asset Backed Securities [Member] \| Unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0	[4]	0	[4]
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	1,925,000,000	[5]	1,813,000,000	[5]
Real Estate [Member] \| Quoted price in active markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0	[5]	0	[5]
Real Estate [Member] \| Significant other observable inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	12,000,000	[5]	13,000,000	[5]
Real Estate [Member] \| Unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	1,800,000,000	[5]	1,785,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	1,913,000,000	[5]	1,800,000,000	[5]
Defined Benefit Plan Actual Return On Plan Assets Sold During Period	11,000,000		20,000,000
Defined Benefit Plan Actual Return On Plan Assets Still Held	79,000,000		102,000,000
Defined Benefit Plan Purchases Sales And Settlements	23,000,000		-107,000,000
Other Pension Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	2,244,000,000	[6]	2,110,000,000	[6]
Other Pension Plan Assets [Member] \| Quoted price in active markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0	[6]	0	[6]
Other Pension Plan Assets [Member] \| Significant other observable inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	2,244,000,000	[6]	2,110,000,000	[6]
Other Pension Plan Assets [Member] \| Unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0	[6]	0	[6]
Cash And Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	448,000,000	[7]	209,000,000	[7]
Cash And Cash Equivalents [Member] \| Quoted price in active markets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	201,000,000	[7]	2,000,000	[7]
Cash And Cash Equivalents [Member] \| Significant other observable inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	247,000,000	[7]	207,000,000	[7]
Cash And Cash Equivalents [Member] \| Unobservable inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0	[7]	0	[7]
Other Assets And Liabilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	443,000,000	[8]	592,000,000	[8]
Pension Plan Assets Leveled [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	32,295,000,000		30,763,000,000
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Loss (Income), Pension and Other Postretirement Benefit Plans, Net Unamortized Loss (Gain) Arising During Period, before Tax	4,353,000,000
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Arising During Period, before Tax	5,000,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.80%		4.70%
Defined Benefit Plan, Funded Status of Plan	-5,115,000,000		-1,671,000,000
Beginning Balance, Benefit Obligation	33,026,000,000		35,708,000,000
Defined Benefit Plan, Service Cost	487,000,000		569,000,000		500,000,000
Defined Benefit Plan, Interest Cost	1,517,000,000		1,373,000,000		1,331,000,000
Defined Benefit Plan, Benefit Obligation, Other	-519,000,000		-167,000,000
Defined Benefit Plan, Actuarial Gain (Loss)	5,277,000,000		-3,027,000,000
Defined Benefit Plan, Actuarial Loss (Gain)	1,100,000,000
Defined Benefit Plan, Benefits Paid	-1,939,000,000		-1,601,000,000
Defined Benefit Plan, Net Settlements Curtailments Benefit Obligation	-1,000,000		-53,000,000
Defined Benefit Plan Plan Amendments	5,000,000		224,000,000
Ending Balance, Benefit Obligation	37,853,000,000		33,026,000,000		35,708,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	31,355,000,000		29,928,000,000
Defined Benefit Plan Actual Return On Plan Assets	3,140,000,000		3,019,000,000
Contributions to Defined Benefit Plans	615,000,000		236,000,000
Defined Benefit Plan, Plan Assets, Benefits Paid	-1,939,000,000		-1,601,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Other	-433,000,000		-227,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	32,738,000,000		31,355,000,000		29,928,000,000
Defined Benefit Plan Assets For Plan Benefits Noncurrent	681,000,000		768,000,000
Pension And Other Postretirement Defined Benefit Plans Current Liabilities	-104,000,000		-74,000,000
Pension And Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	-5,692,000,000		-2,365,000,000
Defined Benefit Plan Amounts Recognized In Balance Sheet	-5,115,000,000		-1,671,000,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Loss (Gain) Arising During Period, before Tax	9,068,000,000		5,261,000,000
Other Comprehensive Income Defined Benefit Plan Net Prior Service (Credit) Cost Arising During Period Before Tax	-27,000,000		-37,000,000
Percentage Of Projected Benefit Obligation Comprised Of Domestic Plan Benefits	75.00%
Defined Benefit Plan, Expected Return on Plan Assets	-2,215,000,000		-2,107,000,000		-1,944,000,000
Defined Benefit Plan Amortization Of Prior Service Cost Credit	-8,000,000		-34,000,000		-24,000,000
Defined Benefit Plan Amortization Of Transition Obligations Assets	0		0		1,000,000
Defined Benefit Plan Amortization Of Gains Losses	429,000,000		954,000,000		722,000,000
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	13,000,000		1,000,000		77,000,000
Defined Benefit Plan, Net Periodic Benefit Cost	223,000,000		756,000,000		663,000,000
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	-429,000,000
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, before Tax	8,000,000
Other Comprehensive Income Defined Benefit Plans Other	-120,000,000
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	3,817,000,000
Defined Benefit Plan Future Amortization Of Net (Gains) Losses	888,000,000
Defined Benefit Plan Amortization Of Net Prior Service Cost Credit	-13,000,000
Defined Benefit Plan Amounts That Will Be Amortized From Accumulated Other Comprehensive Income Loss In Next Fiscal Year	875,000,000
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate	4.70%		4.00%		4.60%
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase	4.20%		4.20%		4.30%
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets	7.60%		7.70%		7.70%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	4.20%		4.20%
Defined Benefit Domestic Plans, Estimated Future Employer Contributions in Next Fiscal Year	200,000,000
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	1,994,000,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	1,824,000,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	1,895,000,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	1,975,000,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	2,040,000,000
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	11,091,000,000
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive (Income) Loss, before Tax	9,041,000,000		5,224,000,000
Net Recognized In Net Periodic Benefit Cost And Other Comprehensive Income Loss	4,040,000,000
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Loss (Income), Pension and Other Postretirement Benefit Plans, Net Unamortized Loss (Gain) Arising During Period, before Tax	9,000,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.80%		4.40%
Defined Benefit Plan, Funded Status of Plan	-952,000,000		-987,000,000
Beginning Balance, Benefit Obligation	987,000,000		1,106,000,000
Defined Benefit Plan, Service Cost	3,000,000		3,000,000		3,000,000
Defined Benefit Plan, Interest Cost	41,000,000		38,000,000		37,000,000
Defined Benefit Plan, Benefit Obligation, Other	21,000,000		21,000,000
Defined Benefit Plan, Actuarial Gain (Loss)	7,000,000		-62,000,000
Defined Benefit Plan, Benefits Paid	-107,000,000		-119,000,000
Ending Balance, Benefit Obligation	952,000,000		987,000,000		1,106,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance	0		0
Contributions to Defined Benefit Plans	85,000,000		95,000,000
Defined Benefit Plan, Plan Assets, Benefits Paid	-107,000,000		-119,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Other	22,000,000		24,000,000
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance	0		0		0
Pension And Other Postretirement Defined Benefit Plans Current Liabilities	-89,000,000		-86,000,000
Pension And Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	-863,000,000		-901,000,000
Defined Benefit Plan Amounts Recognized In Balance Sheet	-952,000,000		-987,000,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Loss (Gain) Arising During Period, before Tax	-113,000,000		-124,000,000
Other Comprehensive Income Defined Benefit Plan Net Prior Service (Credit) Cost Arising During Period Before Tax	-1,000,000		1,000,000
Percentage Of Projected Benefit Obligation Comprised Of Domestic Plan Benefits	88.00%
Projected Benefit Obligation Reduction Due To Plan Change					16,000,000
Defined Benefit Plan Amortization Of Prior Service Cost Credit	-1,000,000		-10,000,000		-4,000,000
Defined Benefit Plan Amortization Of Gains Losses	-4,000,000		-4,000,000		-6,000,000
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0		0		-2,000,000
Defined Benefit Plan, Net Periodic Benefit Cost	39,000,000		27,000,000		28,000,000
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	4,000,000
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, before Tax	1,000,000
Other Comprehensive Income Defined Benefit Plans Other	-1,000,000
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	13,000,000
Defined Benefit Plan Future Amortization Of Net (Gains) Losses	-4,000,000
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate	4.40%		3.60%		4.20%
Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year	7.00%		7.50%
Defined Benefit Plan Ultimate Health Care Cost Trend Rate	5.00%		5.00%
Defined Benefit Plan Year That Rate Reaches Ultimate Trend Rate	2019		2019
Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components	3,000,000
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components 1	-3,000,000
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation	54,000,000
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation 1	-46,000,000
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	89,000,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	86,000,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	81,000,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	75,000,000
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	69,000,000
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	281,000,000
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive (Income) Loss, before Tax	-112,000,000		-125,000,000
Net Recognized In Net Periodic Benefit Cost And Other Comprehensive Income Loss	$52,000,000

[1]	Represents commingled funds that invest primarily in common stocks.
[2]	Represents enhanced equity separate account and commingled fund portfolios. A portion of the portfolio may include long-short market neutral and relative value strategies that invest in publicly traded, equity and fixed income securities, as well as derivatives of equity and fixed income securities and foreign currency.
[3]	Represents limited partner investments with general partners that primarily invest in debt and equity.
[4]	Represents mortgage and asset-backed securities.
[5]	Represents investments in real estate including commingled funds and directly held properties.
[6]	Represents insurance contracts and global balanced risk commingled funds consisting mainly of equity, bonds and some commodities.
[7]	Represents short-term commercial paper, bonds and other cash or cash-like instruments.
[8]	Represents trust receivables and payables that are not leveled.

Employee_Benefits_Plans_Multie

Employee Benefits Plans (Multiemployer Plan) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Multiemployer Plans [Line Items]
Multiemployer Plans General Nature	The risks of participating in these multiemployer plans are different from single-employer plans in that assets contributed are pooled and may be used to provide benefits to employees of other participating employers. If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers. Lastly, if we choose to stop participating in some of our multiemployer plans, we may be required to pay those plans a withdrawal liability based on the underfunded status of the plan.
Multiemployer Plans Period Contributions	$113	$105	$99
Multiemployer Plans Period Contributions Other Than Pensions	14	12	11
National Elevator Industry Plan [Member]
Multiemployer Plans [Line Items]
Entity Tax Identification Number	232694291
Multiemployer Plans Certified Zone Status	Green	Green
Multiemployer Plans Funding Improvement Plan And Rehabilitation Plan	No
Multiemployer Plans Period Contributions	79	71	63
Multiemployer Plans Surcharge	No
Multiemployer Plans Collective Bargaining Arrangement Expiration Date	8-Jul-17
Multiemployer Plans, Period Contributions, Significance of Contributions	1	1
Other Funds [Member]
Multiemployer Plans [Line Items]
Multiemployer Plans Period Contributions	$34	$34	$36

Employee_Benefit_Plans_Stock_B

Employee Benefit Plans (Stock Based Compensation) (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Document Fiscal Year Focus	2014
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum	22.00%		26.00%		30.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	149,000,000
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Vested In Period Total Fair Value	$226		$219		$187
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum	26.00%		27.00%		35.00%
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Volatility Rate	26.00%		27.00%		30.00%
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate	2.20%		2.60%		2.30%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum	0.00%		0.10%		0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum	3.10%		1.90%		2.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	53,000,000
Expected Range Of Shares Awarded Annually Under Long Term Incentive Plan	1.0% to 1.5%
Allocated Share-based Compensation Expense	240		275		210
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	80		97		76
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options	187		378		381
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	125		194		111
Employee Service Share Based Compensation Tax Benefit Realized From Vesting Of Performance Share Units and Other Restricted Stock Awards	49		26		15
Employee Service Share Based Compensation Cash Flow Tax Benefit Reported	103		115		67
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	182
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	8 years 0 months 0 days		7 years 7 months 6 days		7 years 8 months 12 days
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	7 years 7 months 6 days		7 years 3 months 18 days		7 years 4 months 24 days
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number, Beginning Balance	6,239,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net Forfeitures	194,000
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period, Ancillary	0
Share Based Compensation Arrangements By Share Based Payment Award Options Grants Weighted Average Exercise Price Ancillary	$0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	-3,846,000
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period	-299,000
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number, Ending Balance	2,288,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$57.88	[1]
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price	$112.54	[1]
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price	$51.57	[1]
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price	$52.91	[1]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, End of Period	$73.76	[1]
Stock Options And Stock Appreciation Rights SARS [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	4 years 0 months 0 days	[2]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$28.36		$19.91		$19.32
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value	425		608		370
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	40,553,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$76.56	[3]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	1,559
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	5 years 7 months 6 days	[2]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	24,763,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$68.13	[3]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	1,161
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number, Beginning Balance	38,215,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net Forfeitures	4,516,000
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period, Ancillary	0
Share Based Compensation Arrangements By Share Based Payment Award Options Grants Weighted Average Exercise Price Ancillary	$0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	-3,941,000
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period	-386,000
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number, Ending Balance	38,404,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$72.33	[1]
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price	$112.47	[1]
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price	$66.54	[1]
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price	$89.16	[1]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, End of Period	$77.48	[1]
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number, Beginning Balance	2,701,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net Forfeitures	688,000
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period, Ancillary	292,000
Share Based Compensation Arrangements By Share Based Payment Award Options Grants Weighted Average Exercise Price Ancillary	$79
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	-1,095,000
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period	-54,000
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number, Ending Balance	2,532,000		2,701,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$78.77	[4]
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price	$112.49	[4]
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price	$79	[4]
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price	$88.09	[4]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, End of Period	$87.65	[4]	$78.77	[4]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$125.41		$91.71		$82.15
Share Based Compensation Arrangement By Share Based Payment Award Options and Other Restricted Awards Exercised In Period Total Intrinsic Value	154		75		46
Other Incentives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number, Beginning Balance	1,478,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net Forfeitures	387,000
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period, Ancillary	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	-324,000
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period	-46,000
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number, Ending Balance	1,495,000
Performance Share Units And Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	3,230,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$0	[3]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$371
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	1 year 1 month 6 days	[2]

[1]	weighted-average exercise price
[2]	weighted-average contractual remaining term in years
[3]	weighted-average exercise price per share
[4]	weighted-average grant stock price

Restructuring_and_Other_Costs_1

Restructuring and Other Costs (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	$368
Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	345
Utilization and foreign exchange	-174
Restructuring Reserve Ending Balance	171
Expected Costs	483
Costs Incurred	-345
Remaining costs at period end	138
Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	29
Restructuring Reserve Beginning Balance	215
Utilization and foreign exchange	-159
Restructuring Reserve Ending Balance	85	215
Expected Costs	468
Costs Incurred	-29	-421
Remaining costs at period end	18
Prior Two Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, Accrual Adjustment	6
Otis [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	87
Otis [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	137
Costs Incurred	-98
Remaining costs at period end	39
Otis [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	69
Costs Incurred	0	-69
Remaining costs at period end	0
UTC Climate, Controls and Security [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	116
UTC Climate, Controls and Security [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	122
Costs Incurred	-86
Remaining costs at period end	36
UTC Climate, Controls and Security [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	121
Costs Incurred	-25	-89
Remaining costs at period end	7
Pratt and Whitney [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	64
Pratt and Whitney [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	84
Costs Incurred	-64
Remaining costs at period end	20
Pratt and Whitney [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	162
Costs Incurred	-5	-154
Remaining costs at period end	3
UTC Aerospace Systems [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	82
UTC Aerospace Systems [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	115
Costs Incurred	-72
Remaining costs at period end	43
UTC Aerospace Systems [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	86
Costs Incurred	-7	-71
Remaining costs at period end	8
Sikorsky [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	14
Sikorsky [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	20
Costs Incurred	-20
Remaining costs at period end	0
Sikorsky [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	30
Costs Incurred		-38
Restructuring reserve, Accrual Adjustment	8
Remaining costs at period end	0
Eliminations and other [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	5
Eliminations and other [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Expected Costs	5
Costs Incurred	-5
Remaining costs at period end	0
Cost Of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	183
Cost Of Sales [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	155
Cost Of Sales [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	30
Selling General and Administrative [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	185
Selling General and Administrative [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	190
Selling General and Administrative [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	-1
Severance [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	275
Utilization and foreign exchange	-113
Restructuring Reserve Ending Balance	162
Severance [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	9
Restructuring Reserve Beginning Balance	196
Utilization and foreign exchange	-137
Restructuring Reserve Ending Balance	68
Asset Write Downs [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	8
Utilization and foreign exchange	-8
Restructuring Reserve Ending Balance	0
Asset Write Downs [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	1
Restructuring Reserve Beginning Balance	0
Utilization and foreign exchange	-1
Restructuring Reserve Ending Balance	0
Facility Exit, Lease Termination & Other Costs [Member] \| Current Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	62
Utilization and foreign exchange	-53
Restructuring Reserve Ending Balance	9
Facility Exit, Lease Termination & Other Costs [Member] \| Prior Year Actions [Member]
Restructuring Cost and Reserve [Line Items]
Net pre-tax restructuring costs	19
Restructuring Reserve Beginning Balance	19
Utilization and foreign exchange	-21
Restructuring Reserve Ending Balance	$17

Financial_Instruments_Narrativ

Financial Instruments (Narrative) (Details) (USD $)	12 Months Ended
Financial Instruments (Narrative) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Four Quarter Rolling Average Of Notional Amount Of Foreign Exchange Contracts Hedging Foreign Currency Transactions	$13,900,000,000	$12,300,000,000
Gain on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$51,000,000	$22,000,000

Financial_Instruments_Fair_Val

Financial Instruments (Fair Value of Derivative Instruments) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Asset Derivatives
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments - assets	$3	$59
Derivatives not designated as hedging instruments - assets	139	31
Liability Derivatives
Derivatives, Fair Value [Line Items]
Derivatives designated as hedging instruments - liabilities	248	103
Derivatives not designated as hedging instruments - liabilities	$71	$54

Financial_Instruments_Impact_f

Financial Instruments (Impact from Foreign Exchange Derivative Instruments) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Loss recorded in Accumulated other comprehensive loss	($263)	($136)
Loss reclassified from Accumulated other comprehensive loss into Product sales (effective portion)	96	25
Foreign Currency Cash Flow Hedge Loss to be Reclassified During Next 12 Months	($121)

Fair_Value_Measurements_Fair_V

Fair Value Measurements (Fair Value Hierarchy) (Details) (USD $)	12 Months Ended		18 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investment, Other than Temporary Impairment		($25)
Available-for-sale securities	961	988	961
Derivative Assets	142	90	142
Derivative liabilities	-319	-157	-319
Business Dispositions	3	66	3
Recurring fair value measurements \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	961	988	961
Derivative Assets	0	0	0
Derivative liabilities	0	0	0
Recurring fair value measurements \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0	0
Derivative Assets	142	90	142
Derivative liabilities	-319	-157	-319
Recurring fair value measurements \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0	0
Derivative Assets	0	0	0
Derivative liabilities	0	0	0
Nonrecurring fair value measurements \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Dispositions	0	0	0
Nonrecurring fair value measurements \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Dispositions	3	66	3
Nonrecurring fair value measurements \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Dispositions	0	0	0
Pratt and Whitney [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	48		23
Gain (Loss) on Disposition of Business		193
UTC Climate, Controls and Security [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (Loss) on Disposition of Business	30	55
Sikorsky [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investment, Other than Temporary Impairment	($28)

Fair_Value_Measurements_Fair_V1

Fair Value Measurements (Fair Value Techniques) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	$214	$655
Customer Financing Notes Receivable	262	394
Short-Term Borrowings	-126	-388
Long-term debt (excluding capitalized leases)	-19,634	-19,807
Long-term liabilities	-80	-283
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	204	586
Customer Financing Notes Receivable	260	366
Short-Term Borrowings	-126	-388
Long-term debt (excluding capitalized leases)	-22,254	-21,525
Long-term liabilities	-74	-253
Level 1 \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	0
Customer Financing Notes Receivable	0
Short-Term Borrowings	0
Long-term debt (excluding capitalized leases)	0
Long-term liabilities	0
Level 2 \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	204
Customer Financing Notes Receivable	260
Short-Term Borrowings	0
Long-term debt (excluding capitalized leases)	-21,883
Long-term liabilities	-74
Level 3 \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	0
Customer Financing Notes Receivable	0
Short-Term Borrowings	-126
Long-term debt (excluding capitalized leases)	-371
Long-term liabilities	$0

Guarantees_Details

Guarantees (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Guarantee Obligations [Line Items]
Environmental, health and safety, tax employment matters	$186	$189
Balance as of January 1	1,360	1,332
Warranties and performance guarantees issued	337	313
Settlements made	-344	-287
Other	-40	2
Balance as of December 31	1,313	1,360
Credit Facilities And Debt Obligations Unconsolidated Subsidiaries (expire 2015 to 2034)
Guarantee Obligations [Line Items]
Maximum Potential Payment	211	231
Carrying Amount of Liability	15	6
Commercial aerospace financing arrangements (see Note 5)
Guarantee Obligations [Line Items]
Maximum Potential Payment	632	615
Carrying Amount of Liability	21	25
Performance Guarantee
Guarantee Obligations [Line Items]
Maximum Potential Payment	136	150
Guarantee Type Increase	81
Carrying Amount of Liability	$0	$0

Contingent_Liabilities_Details

Contingent Liabilities (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Operating Leases Future Minimum Payments Due	$2,525
Operating Leases Future Minimum Payments Due Current	593
Operating Leases Future Minimum Payments Due In Two Years	479
Operating Leases Future Minimum Payments Due In Three Years	340
Operating Leases Future Minimum Payments Due In Four Years	235
Operating Leases Future Minimum Payments Due In Five Years	171
Operating Leases Future Minimum Payments Due Thereafter	707
Rent Expense	464	456	457
Accrual For Environmental Loss Contingencies	903	936
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 $100 million (including interest through DecemberÂ 31,Â 2014).
Loss Contingency Damages Sought	$100 million (including interest through December 31, 2014)
Loss Contingency, Settlement Agreement, Date	3/22/13
Loss Contingency Actions Taken By Court Arbitrator Or Mediator	On December 10, 2014, the Federal Circuit affirmed the judgment of the U.S. Court of Federal Claims in favor of Sikorsky.
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. DOD appealed this decision to the United States Court of Appeals for the Federal Circuit.
Department of Justice Lawsuit Against Pratt and Whitney [Member]
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	1999
Loss Contingency, Damages Sought, Value	624
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 PrattÂ & Whitney violated the civil False Claims Act and common law. The claims relate to the â€œFighter Engine Competitionâ€ between PrattÂ & 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 PrattÂ & 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 PrattÂ & Whitney's liability to be approximately $624 million.
Loss Contingency Period Of Occurrence	fiscal years 1985 through 1990
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, Settlement Agreement, Date	6/17/13
Loss Contingency Actions Taken By Court Arbitrator Or Mediator	On AugustÂ 1, 2008, the trial court held that the Air Force had not suffered any actual damages because PrattÂ & Whitney had made significant price concessions after the alleged overstatements were made. However, the trial court judge found that PrattÂ & 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 PrattÂ & 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. On November 18, 2010, the Sixth Circuit affirmed PrattÂ & Whitney's liability for the civil penalty 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. We filed an appeal from the judgment to the United States Court of Appeals for the Sixth Circuit on August 26, 2013. Oral argument in the appeal was held on December 2, 2014, and a decision from the Sixth Circuit is expected in early 2015. 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 reasonably 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.
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. 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. Â§ 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.
Loss Contingency, Damages Awarded, Value	$664
Loss Contingency, Additional Actions Taken by Court, Arbitrator or Mediator	On JuneÂ 18, 2012, the trial court found that PrattÂ & 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 MarchÂ 3, 1989, which are not recoverable under the False Claims Act.
German Tax Office Against Otis [Member]
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	8/3/12
Loss Contingency Allegations	As previously disclosed, UTC has been involved in administrative review proceedings with the German Tax Office, which concern approximately €215Â million (approximately $265 million) of tax benefits that we have claimed related to a 1998 reorganization of the corporate structure of Otis operations in Germany. Upon audit, these tax benefits were disallowed by the German Tax Office. UTC estimates interest associated with the aforementioned tax benefits is an additional approximately €115 million (approximately $140 million).
Loss Contingency Damages Sought	€215Â million (approximately $265 million)
Loss Contingency Actions Taken By Plaintiff And Defendant	On August 3, 2012, we filed suit in the local German Tax Court (Berlin-Brandenburg). In 2008 the German Federal Tax Court (FTC) denied benefits to another taxpayer in a case involving a German tax law relevant to our reorganization. The determination of the FTC 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 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 FTC for further consideration of certain related issues. In May 2010, the FTC released its decision, in which it resolved certain tax issues that may be relevant to our suit and remanded the case to a lower court for further development. In 2012, the lower court decided in favor of the other taxpayer and the German Government again appealed the findings to the FTC.
Loss Contingency, Interest	€115 million (approximately $140 million)
Loss Contingency, Management's Assessment and Process	In November 2014, the FTC ruled in favor of the German Government, and against the other taxpayer.Â The FTC decision in the case involving the other taxpayer is not determinative of the outcome in our case and we will continue vigorously to litigate the matter.Â However, in light of the FTC decision in the case involving the other taxpayer, we have fully accrued for the matter during the quarter ended December 31, 2014.
U.S. Defense Contract Management Claim against Pratt & Whitney
Loss Contingencies [Line Items]
Loss Contingency Lawsuit Filing Date	24-Dec-13
Loss Contingency Allegations	By letter dated December 24, 2013, a Divisional Administrative Contracting Officer of the United States Defense Contract Management Agency asserted a claim and demand for payment of $210,968,414 against Pratt & Whitney. The claim is based on Pratt & Whitney's alleged noncompliance with cost accounting standards from January 1, 2005 to December 31, 2012, due to its method of determining the cost of collaborator parts used in the calculation of material overhead costs for government contracts.
Loss Contingency Damages Sought	$210,968,414
Loss Contingency Actions Taken By Defendant	On March 18, 2014, Pratt & Whitney filed an appeal to the Armed Services Board of Contract Appeals. Pratt & Whitneyâ€™s appeal is still pending and we continue to believe the governmentâ€™s claim is without merit.

Segment_Financial_Data_By_Segm

Segment Financial Data (By Segment) (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Document Fiscal Year Focus									2014
Operating profit									$9,769	$9,209	$7,684
Total Assets	91,289				90,594				91,289	90,594	89,409
Capital Expenditures									1,711	1,688	1,389
Depreciation & Amortization									1,907	1,821	1,524
Major Customers, U.S. Government Sales									9,619	9,879	10,098
Net Sales	16,996	16,168	17,191	14,745	16,759	15,462	16,006	14,399	65,100	62,626	57,708
Otis [Member]
Segment Reporting Information [Line Items]
Operating profit									2,640	2,590	2,512
Total Assets	9,313				9,354				9,313	9,354	8,866
Capital Expenditures									87	122	141
Depreciation & Amortization									209	209	220
Net Sales									12,982	12,484	12,056
UTC Climate, Controls and Security [Member]
Segment Reporting Information [Line Items]
Operating profit									2,782	2,590	2,425
Total Assets	21,217				21,543				21,217	21,543	22,253
Capital Expenditures									228	266	265
Depreciation & Amortization									349	380	418
Net Sales									16,823	16,809	17,090
Pratt and Whitney [Member]
Segment Reporting Information [Line Items]
Operating profit									2,000	1,876	1,589
Total Assets	18,143				17,062				18,143	17,062	15,938
Capital Expenditures									692	617	462
Depreciation & Amortization									390	319	324
Major Customers, U.S. Government Sales									3,126	3,559	3,718
Net Sales									14,508	14,501	13,964
UTC Aerospace Systems [Member]
Segment Reporting Information [Line Items]
Operating profit									2,355	2,018	944
Total Assets	35,034				35,461				35,034	35,461	35,589
Capital Expenditures									533	510	367
Depreciation & Amortization									807	761	412
Major Customers, U.S. Government Sales									2,459	2,530	1,742
Net Sales									14,215	13,347	8,334
Sikorsky [Member]
Segment Reporting Information [Line Items]
Operating profit									219	594	712
Total Assets	4,973				5,762				4,973	5,762	4,975
Capital Expenditures									116	119	94
Depreciation & Amortization									86	85	85
Major Customers, U.S. Government Sales									3,837	3,648	4,512
Net Sales									7,451	6,253	6,791
Total Segments [Member]
Segment Reporting Information [Line Items]
Operating profit									9,996	9,668	8,182
Total Assets	88,680				89,182				88,680	89,182	87,621
Capital Expenditures									1,656	1,634	1,329
Depreciation & Amortization									1,841	1,754	1,459
Net Sales									65,979	63,394	58,235
Eliminations and other [Member]
Segment Reporting Information [Line Items]
Operating profit									261	22	-72
Total Assets	2,609				1,412				2,609	1,412	1,788
Capital Expenditures									55	54	60
Depreciation & Amortization									66	67	65
Net Sales									-879	-768	-527
General corporate expenses [Member]
Segment Reporting Information [Line Items]
Operating profit									-488	-481	-426
Net Sales									0	0	0
Other [Member]
Segment Reporting Information [Line Items]
Major Customers, U.S. Government Sales									$197	$142	$126

Segment_Financial_Data_By_Geog

Segment Financial Data (By Geographic Region) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Document Fiscal Year Focus	2014
United States Export Sales	$13,769	$12,171	$9,201
External Net Sales by Geography	65,100	62,626	57,708
Operating profit by Geography	9,769	9,209	7,684
Long-Lived Assets by Geography	9,276	8,866	8,518
United States Operations
External Net Sales by Geography	38,155	35,994	32,175
Operating profit by Geography	5,236	4,780	3,663
Long-Lived Assets by Geography	4,798	4,483	4,311
Europe [Member]
United States Export Sales	4,960	4,489	3,117
External Net Sales by Geography	12,630	12,652	11,823
Operating profit by Geography	2,292	2,419	2,100
Long-Lived Assets by Geography	1,645	1,796	1,804
Asia Pacific [Member]
United States Export Sales	4,508	4,517	2,998
External Net Sales by Geography	8,795	8,696	8,733
Operating profit by Geography	1,719	1,773	1,648
Long-Lived Assets by Geography	1,020	957	947
Other
United States Export Sales	4,301	3,165	3,086
External Net Sales by Geography	5,513	5,274	4,964
Operating profit by Geography	749	696	772
Long-Lived Assets by Geography	1,383	1,203	1,122
Eliminations and other
External Net Sales by Geography	7	10	13
Operating profit by Geography	-227	-459	-499
Long-Lived Assets by Geography	$430	$427	$334

Selected_Quarterly_Financial_D2

Selected Quarterly Financial Data - Unaudited (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2015
Selected Quarterly Financial Information [Abstract]
Document Fiscal Year Focus									2014
Net Sales	$16,996	$16,168	$17,191	$14,745	$16,759	$15,462	$16,006	$14,399	$65,100	$62,626	$57,708
Gross margin	4,636	4,702	4,260	4,055	4,475	4,442	4,454	3,934
Net income attributable to common shareowners	$1,473	$1,854	$1,680	$1,213	$1,463	$1,432	$1,560	$1,266	$6,220	$5,721	$5,130
Earnings Per Share of Common Stock - Basic and Diluted:
Basic - net income	$1.64	$2.07	$1.87	$1.35	$1.62	$1.59	$1.73	$1.40	$6.92	$6.35	$5.73
Diluted - net income	$1.62	$2.04	$1.84	$1.32	$1.60	$1.57	$1.71	$1.39	$6.82	$6.25	$5.66
Common Stock Price - High	$117.24	$115.93	$120.09	$118.31	$113.80	$112	$97.55	$93.59
Common Stock Price - Low	$99.17	$103.79	$113.10	$107.91	$102.76	$93.80	$91.05	$83.55
Dividend	$0.59	$0.59	$0.59	$0.59	$0.59	$0.54	$0.54	$0.54	$2.36	$2.19	$2.03
Registered Shareholders Total												20,639

Performance_Graph_Unaudited_De

Performance Graph - Unaudited (Details) (USD $)	12 Months Ended
Performance Graph - Unaudited (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Performance Graph [Line Items]
Document Fiscal Year Focus	2014
United Technologies Corporation
Performance Graph [Line Items]
December, Graph Details	$186.12	$180.37	$127.14	$110.46	$116.24	$100
S&P 500 Index
Performance Graph [Line Items]
December, Graph Details	205.14	180.44	136.3	117.49	115.06	100
Dow Jones Industrial Average
Performance Graph [Line Items]
December, Graph Details	$194.44	$176.69	$136.28	$123.62	$114.06	$100