Debt and Credit Agreements (Recovery and Term) (Details) - USD ($) $ in Millions	1 Months Ended
	May 31, 2022	Apr. 30, 2022	Sep. 30, 2022	Mar. 31, 2022	Jan. 31, 2022	Aug. 31, 2021
Debt Instrument [Line Items]
Outstanding borrowings			$ 1,131
SCE
Debt Instrument [Line Items]
Outstanding borrowings			1,109
SCE | 2.75% first and refunding mortgage bonds due 2032
Debt Instrument [Line Items]
Debt, face amount					$ 500
Interest rate on debt (as a percent)					2.75%
SCE | 3.45% first and refunding mortgage bonds due 2052
Debt Instrument [Line Items]
Debt, face amount					$ 700
Interest rate on debt (as a percent)					3.45%
SCE | 4.20% first and refunding mortgage bonds due in 2025
Debt Instrument [Line Items]
Debt, face amount	$ 300
Interest rate on debt (as a percent)	4.20%
SCE | 4.70% first and refunding mortgage bonds due in 2027
Debt Instrument [Line Items]
Debt, face amount	$ 600
Interest rate on debt (as a percent)	4.70%
SCE | 5.45% first and refunding mortgage bonds due 2052
Debt Instrument [Line Items]
Debt, face amount	$ 350
Interest rate on debt (as a percent)	5.45%
SCE | Series 2022-A senior secured recovery bonds
Debt Instrument [Line Items]
Debt, face amount				$ 533
SCE | Recovery Bonds, 1.98% due 2030
Debt Instrument [Line Items]
Debt, face amount				$ 100
Interest rate on debt (as a percent)				1.98%
SCE | Recovery Bonds, 2.94% due 2044
Debt Instrument [Line Items]
Debt, face amount				$ 305
Interest rate on debt (as a percent)				2.94%
SCE | Recovery Bonds, 3.24% due 2048
Debt Instrument [Line Items]
Debt, face amount				$ 128
Interest rate on debt (as a percent)				3.24%
SCE | 0.60% term loan due 2022 | SOFR
Debt Instrument [Line Items]
Basis points	0.60%
SCE | 0.55% term loan due 2023
Debt Instrument [Line Items]
Outstanding borrowings			730
SCE | 0.55% term loan due 2023 | SOFR
Debt Instrument [Line Items]
Basis points	0.55%
Edison International Parent and Other
Debt Instrument [Line Items]
Outstanding borrowings			$ 22
Edison International Parent and Other | 0.70% term loan due April 2023
Debt Instrument [Line Items]
Debt, face amount		$ 600
Edison International Parent and Other | 0.70% term loan due April 2023 | SOFR
Debt Instrument [Line Items]
Basis points		0.70%
Edison International Parent and Other | Senior Notes 4.70 Percent Due 2025
Debt Instrument [Line Items]
Debt, face amount						$ 400
Interest rate on debt (as a percent)						4.70%