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Related-Party Transactions (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Jun. 30, 2023 | Dec. 31, 2022
Related party transactions |  |  |  |
Long-term insurance receivables | $ 418 | $ 501 |  |
SCE |  |  |  |
Related party transactions |  |  |  |
Wildfire insurance expense |  |  | $ 450 |
Subsidiary of Common Parent | SCE |  |  |  |
Related party transactions |  |  |  |
Contribution expense | 19 |  |  |
Wildfire liability insurance | Subsidiary of Common Parent | SCE |  |  |  |
Related party transactions |  |  |  |
Wildfire-related insurance premiums | 0 | 0 |  | $ 273
Insurance purchased but not reinsured |  |  | $ 93 |
Insurance income and related expense | 44 |  |  |
Long-term insurance receivables | 303 | 355 |  |
Wildfire insurance expense | $ 132 | $ 213 |  |

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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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- Definition The total amount of other operating income, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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