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Variable Interest Entities - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Variable Interest Entity [Line Items] |  |  |
Investment in unconsolidated entities, maximum exposure | $ 6 |  | $ 6
Capital contributions, loans or advances | 207 | $ 207 |
USCC EIP LLC |  |  |
Variable Interest Entity [Line Items] |  |  |
Capital contributions, loans or advances | $ 187 | $ 193 |

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