Debt and Credit Agreements - Narrative (Details) $ in Millions	Jan. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Oct. 31, 2023 USD ($)
Debt
Commitment		$ 4,850
Outstanding letters of credit		$ 6
SCE
Debt
Covenant debt to total capitalization ratio		0.65
Actual debt to capitalization ratio		0.58
SCE | 4.875% first and refunding mortgage bonds due in 2027 | Subsequent Event
Debt
Debt, face amount	$ 850
Interest rate on debt (as a percent)	5.45%
SCE | 5.20% first and refunding mortgage bonds due in 2034 | Subsequent Event
Debt
Debt, face amount	$ 650
Interest rate on debt (as a percent)	5.90%
SCE | Standby letters of credit
Debt
Commitment			$ 625
Outstanding letters of credit		$ 118
Unused capacity		$ 507
Edison International Parent and Other:
Debt
Covenant debt to total capitalization ratio		0.70
Actual debt to capitalization ratio		0.65