Variable Interest Entities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Assets, Current	$ 41,992	$ 43,376
Assets	158,772	162,153
Liabilities, Current	34,131	35,848
Liabilities	85,803	88,269
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets, Current	7,026	6,652
Assets, Noncurrent	826	868
Assets	7,852	7,520
Liabilities, Current	7,664	7,365
Liabilities, Noncurrent	72	89
Liabilities	$ 7,736	$ 7,454
International Aero Engines AG [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Qualitative of Quantitative Information, Net Percentage	61.00%
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	49.50%
International Aero Engines LLC [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Qualitative of Quantitative Information, Net Percentage	59.00%
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	59.00%