Investments (Other) (Details) - Edison International Parent and Other - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Investments
Marketable securities		$ 5
Equity investments without readily determinable fair values	$ 13	12
Cumulative upward adjustments investments without readily determinable fair values	$ 9	$ 9

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details