Basis of Presentation [Line Items]

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- Definition

Contract Asset And Inventory Write Offs

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- Definition

Estimated Credit Losses

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- Definition

Unfavorable EAC adjustment on a commercial engine aftermarket contract

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- Definition

Unfavorable EAC adjustment related to military contracts

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- Definition

Unfavorable EAC adjustment related to the restructuring of a customer contract

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- Definition

Unfavorable EAC adjustments on commercial aftermarket contracts

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		9 Months Ended
Basis of Presentation (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basis of Presentation [Line Items]
Goodwill Impairment Loss	$ 0	$ 0				$ 0	$ 3,183
Estimated Credit Losses		48					357
Collins Aerospace Systems [Member] \| Patents and trademarks [Member]
Basis of Presentation [Line Items]
Asset Impairment Charges					$ 57
Pratt & Whitney [Member]
Basis of Presentation [Line Items]
Unfavorable EAC adjustment related to military contracts			$ 44
Collins Aerospace Systems [Member]
Basis of Presentation [Line Items]
Goodwill Impairment Loss			$ 3,200
Contract Asset And Inventory Write Offs		13					146
Pratt & Whitney [Member]
Basis of Presentation [Line Items]
Unfavorable EAC adjustment related to the restructuring of a customer contract		129					129
Asset Impairment Charges		$ 89					89
Unfavorable EAC adjustment on a commercial engine aftermarket contract							$ 334
Unfavorable EAC adjustments on commercial aftermarket contracts				$ 48