Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental Cash Flow Information [Abstract]
Interest, net of amounts capitalized	$ 267	$ 401	$ 340
Income taxes, net of amounts refunded	53	(33)	122
Capital expenditures	$ 49	$ 50	$ 133