Variable Interest Entities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Total Current Assets	$ 43,376	$ 61,577
Total Assets	162,153	139,615
Total Current Liabilities	35,848	46,594
Liabilities	$ 88,269	95,289
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%
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total Current Assets	$ 6,652	5,448
Assets, Noncurrent	868	894
Total Assets	7,520	6,342
Total Current Liabilities	7,365	6,971
Liabilities, Noncurrent	89	94
Liabilities	$ 7,454	$ 7,065