Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities:
Interest paid	$ 197	$ 231	$ 251
Income taxes paid (received), net of refunds	173	24	(51)
Noncash investing activities:
Increase in asset retirement costs	30	56	0
Proceeds from tax refunds	1	2	94
Capital expenditures incurred but not yet paid	$ 111	$ 81	$ 95