Investments (Trust Info) (Details) - SCE - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Investments
Cumulative unrealized holding gains, net of losses	$ 1,400	$ 2,100
Deferred income taxes related to unrealized gains	272	517
Nuclear decommissioning trusts, net of deferred tax	$ 3,600	$ 4,400

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