Derivative Instruments (Notional Values) (Details) - SCE	12 Months Ended
	Dec. 31, 2022 Bcfe GWh	Dec. 31, 2021 GWh Bcfe
Electricity options, swaps and forwards (GWh)
Derivatives
Notional volumes of derivative instruments	1,022	1,869
Natural gas options, swaps and forwards (Bcf)
Derivatives
Notional volumes of derivative instruments | Bcfe	42	58
Congestion revenue rights (GWh)
Derivatives
Notional volumes of derivative instruments	44,028	33,216