Variable Interest Entities (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Assets, Current	$ 42,274	$ 61,577
Assets	161,517	139,615
Liabilities, Current	35,291	46,594
Liabilities	92,590	95,289
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets, Current	6,097	5,448
Assets, Noncurrent	908	894
Assets	7,005	6,342
Liabilities, Current	6,904	6,971
Liabilities, Noncurrent	109	94
Liabilities	$ 7,013	$ 7,065
International Aero Engines AG [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Methodology for Determining Whether Entity is Primary Beneficiary	Pratt & Whitney holds a 61% net interest in the International Aero Engines AG (IAE) collaboration with MTU Aero Engines AG (MTU) and Japanese Aero Engines Corporation (JAEC) and a 49.5% ownership interest in IAE. IAE’s business purpose is to coordinate the design, development, manufacturing and product support of the V2500 program through involvement with the collaborators.
International Aero Engines LLC [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Methodology for Determining Whether Entity is Primary Beneficiary	Additionally, Pratt & Whitney, JAEC and MTU are participants in International Aero Engines, LLC (IAE LLC), whose business purpose is to coordinate the design, development, manufacturing and product support for the PW1100G-JM engine for the Airbus A320neo aircraft and the PW1400G-JM engine for the Irkut MC21 aircraft. Pratt & Whitney holds a 59% net interest and a 59% ownership interest in IAE LLC. IAE and IAE LLC retain limited equity with the primary economics of the programs passed to the participants.