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Commiments and Contingencies Commiments and Contingencies (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Loss Contingencies [Line Items] |  |
Total contingencies | $ 23 | $ 24
Accrual for Environmental Loss Contingencies, Gross | 24 | 25
Current portion (included in Accounts payable and accrued liabilities) | (1) | (1)
Long-term portion | 23 | 24
Environmental reserves |  |
Loss Contingencies [Line Items] |  |
Total contingencies | 24 | 25
Other reserves |  |
Loss Contingencies [Line Items] |  |
Total contingencies | $ 0 | $ 0

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