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Related-Party Transactions (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 28, 2025 | Jul. 31, 2022 | Jun. 30, 2023 | Mar. 31, 2025 | Dec. 31, 2024
Related party transactions |  |  |  |  |
Long-term insurance receivable due from affiliate |  |  |  | $ 406 | $ 418
SCE |  |  |  |  |
Related party transactions |  |  |  |  |
Wildfire insurance expense | $ 50 |  | $ 450 |  |
SCE | Wildfire Liability Insurance | Subsidiary of Common Parent |  |  |  |  |
Related party transactions |  |  |  |  |
Wildfire-related insurance premiums |  | $ 273 |  |  |
Long-term insurance receivable due from affiliate |  |  |  | $ 303 | $ 303

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- Definition Carrying amount due after one year of the balance sheet date (or one operating cycle, if longer) of amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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