Variable Interest Entities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Assets, Current	$ 42,552	$ 43,376
Assets	160,608	162,153
Liabilities, Current	36,359	35,848
Liabilities	87,266	88,269
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Assets, Current	7,670	6,652
Assets, Noncurrent	853	868
Assets	8,523	7,520
Liabilities, Current	8,372	7,365
Liabilities, Noncurrent	83	89
Liabilities	$ 8,455	$ 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%