Other income (expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Income and Expenses [Abstract]
Investment and interest income	$ 80	$ 112	$ 202
Foreign exchange gains (losses)	110	(193)	(67)
License fee income	123	104	121
Debt and Equity Securities, Gain (Loss)	134	37	65
Net periodic pension and OPEB income (cost), excluding service cost	1,279	(90)	(363)
Miscellaneous income (loss)	88	(14)	(15)
Other income (expense)	$ 1,814	$ (44)	$ (57)