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Investment in Cenovus Energy - Narrative (Details) shares in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) shares
Debt and Equity Securities, FV-NI [Line Items] |
Equity securities, shares sold (in shares) | shares | 91
Cenovus Energy Inc |
Debt and Equity Securities, FV-NI [Line Items] |
Net gain | $ | $ 251
Common Stock | Cenovus Energy Inc |
Debt and Equity Securities, FV-NI [Line Items] |
Equity securities, shares sold (in shares) | shares | 91
Proceeds received from sale of equity securities | $ | $ 1,400

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