Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental Cash Flow Information
Amount of receivables sold	$ 436	$ 539	$ 600
Receivables sold under supply-chain factoring program	176	133	147
Interest paid in cash	252	303	236
Income taxes paid in cash
Income taxes paid in cash	91	103	108
Cash interest included in note repurchase premiums	41	54	0
U.S.
Income taxes paid in cash
Income taxes paid in cash	1	2	11
Non-U.S.
Income taxes paid in cash
Income taxes paid in cash	$ 90	$ 101	$ 97