Derivative Instruments (Notional Values) (Details) - SCE	3 Months Ended	12 Months Ended
	Mar. 31, 2023 GWh Bcfe	Dec. 31, 2022 Bcfe GWh
Electricity options, swaps and forwards (GWh)
Derivatives
Notional volumes of derivative instruments	1,824	1,022
Natural gas options, swaps and forwards (Bcf)
Derivatives
Notional volumes of derivative instruments | Bcfe	46	42
Congestion revenue rights (GWh)
Derivatives
Notional volumes of derivative instruments	36,672	44,028