Debt and Credit Agreements - First and Refunding Mortgage Bonds (Details) $ in Millions	Mar. 31, 2025 USD ($)
SCE
Debt
Debt, face amount	$ 3,000
SCE | 5.45% first and refunding mortgage bonds due in 2035
Debt
Interest rate on debt (as a percent)	5.45%
Debt, face amount	$ 850
SCE | 5.90% first and refunding mortgage bonds due in 2055
Debt
Interest rate on debt (as a percent)	5.90%
Debt, face amount	$ 650
SCE | 5.25% first and refunding mortgage bonds due 2030
Debt
Interest rate on debt (as a percent)	5.25%
Debt, face amount	$ 850
SCE | 6.20% first and refunding mortgage bonds due 2055
Debt
Interest rate on debt (as a percent)	6.20%
Debt, face amount	$ 650
Edison International Parent and Other | Debt Instrument Senior Notes 6.25 Percent Due 2030
Debt
Interest rate on debt (as a percent)	6.25%
Debt, face amount	$ 550