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Asset Impairments and Transactions -United Kingdom (Details) $ in Millions, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 USD ($) | Dec. 31, 2021 CAD ($) | Dec. 31, 2022 USD ($)
Asset Impairments and Transactions |  |  |
Gross proceeds from sale of assets, net of closing adjustments and other closing costs | $ 250 |  |
Golden Eagle Area Development |  |  |
Asset Impairments and Transactions |  |  |
Ownership interest sold (as percent) | 26.69% | 26.69% |
Disposed of by sale, U.K. Operations | Golden Eagle Area Development |  |  |
Asset Impairments and Transactions |  |  |
Ownership interest sold (as percent) | 26.69% | 26.69% |
Gain on sale of business interests, net of tax |  | $ 227 |
Contingent consideration recognized |  |  | $ 50

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