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Derivative Instruments (Notional Values) (Details) - SCE | 12 Months Ended
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Dec. 31, 2021 GWh Bcfe | Dec. 31, 2020 GWh Bcfe
Electricity options, swaps and forwards (GWh) |  |
Derivatives |  |
Notional volumes of derivative instruments | 1,869 | 1,581
Natural gas options, swaps and forwards (Bcf) |  |
Derivatives |  |
Notional volumes of derivative instruments | Bcfe | 58 | 34
Congestion revenue rights (GWh) |  |
Derivatives |  |
Notional volumes of derivative instruments | 33,216 | 41,151

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