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Investments Accounted for by the Equity Method and Variable Interest Entities - Other Equity Investments (Details) $ in Millions | Dec. 31, 2022 USD ($) MW | Dec. 31, 2021 USD ($)
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Schedule of Equity Method Investments [Line Items] |  |
Generation capacity (in MW) | MW | 16 |
Equity investments in affiliates | $ | $ 133 | $ 157
Gladstone |  |
Schedule of Equity Method Investments [Line Items] |  |
Ownership percentage | 37.50% |
Generation capacity (in MW) | MW | 1,613 |
Equity investments in affiliates | $ | $ 128 |

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