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Fair Value Measurements (Level 3 Inputs) (Details) - SCE - Level 3 - Congestion revenue rights (GWh) - Auction prices $ in Millions | Sep. 30, 2023 USD ($) $ / MWh | Dec. 31, 2022 USD ($) $ / MWh
--- | --- | ---
Quantitative Information About Level 3 Measurements [Line Items] |  |
Fair value, Level 3 assets | $ | $ 34 | $ 67
Fair value, Level 3 liabilities | $ |  | $ 4
Minimum |  |
Quantitative Information About Level 3 Measurements [Line Items] |  |
Derivative Asset (Liability) Net, Measurement Input | (2.86) | (7.91)
Maximum |  |
Quantitative Information About Level 3 Measurements [Line Items] |  |
Derivative Asset (Liability) Net, Measurement Input | 45.78 | 3,856.67
Weighted Average |  |
Quantitative Information About Level 3 Measurements [Line Items] |  |
Derivative Asset (Liability) Net, Measurement Input | 0.29 | 1.64

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