Guarantees (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Product Warranty Liability [Line Items]
Balance as of January 1	$ 1,033	$ 929
Warranties and performance guarantees issued	206	325
Settlements made	(229)	(233)
Other	(10)	(3)
Balance as of September 30	1,000	$ 1,018
Commercial Aerospace Financing Arrangements
Product Warranty Liability [Line Items]
Maximum Potential Payment	333		$ 333
Carrying Amount of Liability	8		7
Guarantee Type, Other
Product Warranty Liability [Line Items]
Carrying Amount of Liability	121		166
third party guarantees
Product Warranty Liability [Line Items]
Maximum Potential Payment	374		48
Carrying Amount of Liability	$ 4		$ 0