Debt and Credit Agreements (Recovery and Term) (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2023
Debt
Outstanding borrowings			$ 1,010
Term loan due May 2023
Debt
Repayments of outstanding debt	$ 730
SCE | 5.30% first and refunding mortgage bonds due 2028
Debt
Debt, face amount			$ 750
Interest rate on debt (as a percent)			5.30%
SCE | 5.70% first and refunding mortgage bonds due 2053
Debt
Debt, face amount			$ 450
Interest rate on debt (as a percent)			5.70%
SCE | 4.9% first and refunding mortgage bonds due 2026
Debt
Debt, face amount			$ 400
Interest rate on debt (as a percent)			4.90%
SCE | 5.875% first and refunding mortgage bonds due 2053
Debt
Debt, face amount			$ 700
Interest rate on debt (as a percent)			5.88%
SCE | 5.65% first and refunding mortgage bonds due 2028
Debt
Debt, face amount			$ 550
Interest rate on debt (as a percent)			5.65%
SCE | Series-A 2023 senior secured recovery bonds
Debt
Debt, face amount	775
SCE | Recovery Bonds, 4.697%, due 2042
Debt
Debt, face amount	$ 425
Interest rate on debt (as a percent)	4.697%
SCE | Recovery Bonds, 5.112%, due 2049
Debt
Debt, face amount	$ 350
Interest rate on debt (as a percent)	5.112%
Edison International Parent and Other | 8.125% Junior subordinated notes due 2053
Debt
Debt, face amount		$ 500
Interest rate on debt (as a percent)		8.125%
Variable rate on debt (as a percent)		3.864%
Edison International Parent and Other | 5.25% Senior Notes due 2028
Debt
Debt, face amount	$ 600
Interest rate on debt (as a percent)	5.25%