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Derivative Instruments - Schedule of Notional Volumes of Derivative Instruments (Details) - SCE | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 Bcfe GWh | Dec. 31, 2024 Bcfe GWh
Electricity options, swaps and forwards |  |
Derivatives |  |
Economic Hedges | 5,679 | 3,295
Natural gas options, swaps and forwards |  |
Derivatives |  |
Economic Hedges | Bcfe | 8 | 4
Congestion revenue rights |  |
Derivatives |  |
Economic Hedges | 4,973 | 8,141
Fin Toll arrangements |  |
Derivatives |  |
Economic Hedges | 236 | 0

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