Supplemental 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 paid, net of amounts capitalized	$ 105	$ 120	$ 118
Taxes paid, net of refunds	215	167	157
Noncash Investing and Financing Activities
Accrued treasury stock repurchases	0	0	4
Accrued capital expenditures	23	(16)	20
Other, Noncash Investing and Financing Activities	2	5	6
ROU assets obtained in exchange for finance lease liabilities	$ 0	$ 78	$ 0