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Derivative Instruments (Notional Values) (Details) - SCE
6 Months Ended 12 Months Ended
Jun. 30, 2023
GWh
Bcfe
Dec. 31, 2022
GWh
Bcfe
Electricity options, swaps and forwards (GWh)    
Derivatives    
Notional volumes of derivative instruments 2,364 1,022
Natural gas options, swaps and forwards (Bcf)    
Derivatives    
Notional volumes of derivative instruments | Bcfe 45 42
Congestion revenue rights (GWh)    
Derivatives    
Notional volumes of derivative instruments 24,290 44,028