Debt and Credit Agreements - Schedule of First and Refunding Mortgage Bonds (Details) - SCE $ in Millions	Jun. 30, 2026 USD ($)
Debt Instrument [Line Items]
Amount (in millions)	$ 1,700
5.15% first and refunding mortgage bonds due in 2029
Debt Instrument [Line Items]
Rate	5.15%
Amount (in millions)	$ 600
4.80% first and refunding mortgage bonds due in 2033
Debt Instrument [Line Items]
Rate	4.80%
Amount (in millions)	$ 600
4.95% first and refunding mortgage bonds due in 2031
Debt Instrument [Line Items]
Rate	4.95%
Amount (in millions)	$ 500

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