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Commitments and Contingencies - Settlements Paid (Details) - USD ($) $ in Millions | 12 Months Ended | 66 Months Ended
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2024
Other Commitments [Line Items] |  |  |  |
Total | $ 1,140 | $ 1,224 | $ 1,924 | $ 10,018
2017/2018 Wildfire/Mudslide Events |  |  |  |
Other Commitments [Line Items] |  |  |  |
Total | 779 | 1,034 | 1,911 | 9,454
Other Wildfire Events |  |  |  |
Other Commitments [Line Items] |  |  |  |
Total | $ 361 | $ 190 | $ 13 | $ 564

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