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Investments (Trust gain loss) (Details) - SCE - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Investments |  |  |  |
Gross realized gains | $ 124 | $ 74 | $ 195 | $ 89
Gross realized losses | (8) | (45) | (31) | (61)
Net unrealized (losses)/gains for equity securities | $ (11) | $ (332) | $ 64 | $ (432)

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