Summary of Significant Accounting Policies (Revenue) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SCE
Public Utilities, General Disclosures [Line Items]
Franchise fees billed to customers	$ 168	$ 172	$ 147

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.

No definition available.

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