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Commitments and Contingencies - Accrual Roll forward (Details) - USD ($) $ in Millions | 12 Months Ended | 66 Months Ended
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2024
Loss contingency accrual roll forward |  |  |  |
Balance, beginning | $ 1,398 |  |  |
Increase in accrued estimated losses | 743 |  |  |
Amounts paid | (1,140) | $ (1,224) | $ (1,924) | $ (10,018)
Balance, end | 1,001 | 1,398 |  | 1,001
2017/2018 Wildfire/Mudslide Events |  |  |  |
Loss contingency accrual roll forward |  |  |  |
Balance, beginning | 715 |  |  |
Increase in accrued estimated losses | 490 |  |  |
Amounts paid | (779) | (1,034) | (1,911) | (9,454)
Balance, end | 426 | 715 |  | 426
Other Wildfire Events |  |  |  |
Loss contingency accrual roll forward |  |  |  |
Balance, beginning | 683 |  |  |
Increase in accrued estimated losses | 253 |  |  |
Amounts paid | (361) | (190) | $ (13) | (564)
Balance, end | $ 575 | $ 683 |  | $ 575

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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-10 + Details
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- Definition Amount of cash outflow reducing loss contingency liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 + Details
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- Definition Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Details
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- Details
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