Investments (Trust Info) (Details) - SCE - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Investments
Cumulative unrealized holding gains, net of losses	$ 1,700	$ 1,600
Deferred income taxes related to unrealized gains	359	321
Nuclear decommissioning trusts, net of deferred tax	$ 3,700	$ 3,600

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