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Investments (Trust Value) (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value |  |
Fair Value | $ 4,039 | $ 4,870
Repurchase agreements |  |
Fair Value |  |
Fair Value | 48 | 37
SCE |  |
Fair Value |  |
Amortized Cost | 2,347 | 2,555
Fair Value | 4,039 | 4,870
SCE | Municipal bonds |  |
Fair Value |  |
Amortized Cost | 843 | 875
SCE | Government and agency securities |  |
Fair Value |  |
Amortized Cost | 933 | 1,095
SCE | Corporate bonds |  |
Fair Value |  |
Amortized Cost | 371 | 386
SCE | Short-term investments and receivables/payables |  |
Fair Value |  |
Amortized Cost | 200 | 199
SCE | Fair Value, Measurements, Recurring |  |
Fair Value |  |
Fair Value | 4,076 | 4,889
SCE | Fair Value, Measurements, Recurring | Stocks |  |
Fair Value |  |
Fair Value | 1,548 | 1,972
SCE | Fair Value, Measurements, Recurring | Municipal bonds |  |
Fair Value |  |
Fair Value | 905 | 1,033
SCE | Fair Value, Measurements, Recurring | Government and agency securities |  |
Fair Value |  |
Fair Value | 986 | 1,212
SCE | Fair Value, Measurements, Recurring | Corporate bonds |  |
Fair Value |  |
Fair Value | 390 | 446
SCE | Fair Value, Measurements, Recurring | Short-term investments and receivables/payables |  |
Fair Value |  |
Fair Value | $ 210 | $ 207

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