Basis of Presentation and Summary of Accounting Principles (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Jun. 30, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Basis of Presentation [Line Items]
Goodwill, Impairment Loss		$ 3,200	$ 0	$ 0	$ 3,183
Estimated credit losses					387
Asset Impairment Charges					111
Unbilled			23,909	23,652
Contractual Obligation			818	929
Contractual Obligation, Consumed in Current Year			111	314	295
Contractual Obligation, Due in Next Fiscal Year			104
Contractual Obligation, Due in Second Year			80
Contractual Obligation, Due in Third Year			68
Contractual Obligation, Due in Fourth Year			67
Contractual Obligation, Due in Fifth Year			65
Contractual Obligation, Due after Fifth Year			434
Capitalized Contract Cost, Net			$ 2,300	2,000
Collaborators interests existing programs low end			13.00%
Collaborators interests existing programs high end			49.00%
Partner share individual program maximum			25.00%
Revenue, Remaining Performance Obligation, Amount			$ 175,000
Revenue, Remaining Performance Obligations, to be recognized within 12 months			25.00%
Revenue, Remaining Performance Obligations, to be recognized longer than 1 year			45.00%
Revenue, Remaining Performance Obligation, years to be recognized			15 years
Russia Sanctions Impact on Pratt & Whitney and Collins
Basis of Presentation [Line Items]
Charges as a Result of Russia Sanctions and Export Controls, Gross	$ 290
Charges as a Result of Russia Sanctions and Export Controls, Net of Tax	210
RPO Related to Our Sales Contracts in Russia
Basis of Presentation [Line Items]
Remaining Performance Obligation (RPO), Reversal	$ 1,300
Accounts Receivable [Member]
Basis of Presentation [Line Items]
Unbilled			$ 298	$ 342
Collins Aerospace Systems [Member]
Basis of Presentation [Line Items]
Goodwill, Impairment Loss		$ 3,200			3,200
Contract asset and inventory write-offs					146
Collins Aerospace Systems [Member] | Patents & trademarks [Member]
Basis of Presentation [Line Items]
Asset Impairment Charges					57
Pratt and Whitney [Member]
Basis of Presentation [Line Items]
Unfavorable EAC adjustment on a commercial engine aftermarket contract					334
Unfavorable EAC adjustment related to the restructuring of a customer contract					129
Asset Impairment Charges					89
Unfavorable EAC adjustments on commercial aftermarket contracts					75
Unfavorable EAC adjustment related to military contracts					44
Reserves relating to a commercial financing arrangement					$ 43