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Investments (Trust Value) (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value Measurements |  |
Fair Values | $ 4,292 | $ 4,173
SCE |  |
Fair Value Measurements |  |
Fair Values | 4,292 | 4,173
Deferred income taxes related to unrealized gains | 397 | 380
SCE | Total debt securities and other |  |
Fair Value Measurements |  |
Amortized Costs | 2,305 | 2,233
Fair Values | 2,551 | 2,515
SCE | Municipal bonds |  |
Fair Value Measurements |  |
Amortized Costs | 704 | 636
Fair Values | 815 | 757
SCE | Government and agency securities |  |
Fair Value Measurements |  |
Amortized Costs | 1,104 | 1,072
Fair Values | 1,195 | 1,186
SCE | Corporate bonds |  |
Fair Value Measurements |  |
Amortized Costs | 464 | 361
Fair Values | 507 | 401
SCE | Short-term investments and receivables/payables |  |
Fair Value Measurements |  |
Amortized Costs | 33 | 164
Fair Values | 34 | 171
SCE | Repurchase agreements |  |
Fair Value Measurements |  |
Fair Values | 6 | 38
SCE | Equity securities |  |
Fair Value Measurements |  |
Fair Values | 1,741 | 1,658
SCE | Fair Value, Measurements, Recurring |  |
Fair Value Measurements |  |
Fair Values | $ 4,365 | $ 4,275

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