Commiments and Contingencies Commiments and Contingencies (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Loss Contingencies [Line Items]
Total contingencies	$ 26	$ 26
Accrual for Environmental Loss Contingencies, Gross	27	27
Current portion (included in Accounts payable and accrued liabilities)	(1)	(1)
Long-term portion	26	26
Environmental reserves
Loss Contingencies [Line Items]
Total contingencies	27	27
Other reserves
Loss Contingencies [Line Items]
Total contingencies	$ 0	$ 0