Summary of Significant Accounting Policies (PPE) (Details) - SCE - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Sep. 30, 2022	Aug. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Depreciation			$ 2,500	$ 2,000	$ 1,800
Depreciation expense based on cost (as a percent)			4.20%	3.70%	3.60%
AFUDC equity capitalized during construction			$ 137	$ 118	$ 121
Impairment and other expense	$ 47	$ 79
Asset impairment, net of tax	$ 34	$ 47
Potential impairment			177	186
Other income.
Property, Plant and Equipment [Line Items]
AFUDC equity capitalized during construction			137	118	121
Interest expense
Property, Plant and Equipment [Line Items]
AFUDC debt capitalized during construction			$ 53	$ 50	$ 53
Generation plant | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives			10 years
Generation plant | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives			55 years
Generation plant | Weighted Average
Property, Plant and Equipment [Line Items]
Estimated Useful Lives			39 years
Distribution plant | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives			20 years
Distribution plant | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives			67 years
Distribution plant | Weighted Average
Property, Plant and Equipment [Line Items]
Estimated Useful Lives			50 years
Transmission plant | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives			30 years
Transmission plant | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives			65 years
Transmission plant | Weighted Average
Property, Plant and Equipment [Line Items]
Estimated Useful Lives			53 years
General plant and other | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives			5 years
General plant and other | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives			60 years
General plant and other | Weighted Average
Property, Plant and Equipment [Line Items]
Estimated Useful Lives			20 years