Derivative Instruments (Notional Values) (Details) - SCE	6 Months Ended	12 Months Ended
	Jun. 30, 2022 GWh Bcfe	Dec. 31, 2021 Bcfe GWh
Electricity options, swaps and forwards (GWh)
Derivatives
Notional volumes of derivative instruments	756	1,869
Natural gas options, swaps and forwards (Bcf)
Derivatives
Notional volumes of derivative instruments | Bcfe	52	58
Congestion revenue rights (GWh)
Derivatives
Notional volumes of derivative instruments	24,301	33,216