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Investments (Trust Info) (Details) - SCE - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Investments |  |
Cumulative unrealized holding gains, net of losses | $ 1,500 | $ 1,600
Deferred income taxes related to unrealized gains | 313 | 321
Nuclear decommissioning trusts, net of deferred tax | $ 3,600 | $ 3,600

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