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Fair Value Measurements - Significant Unobservable Inputs (Details) - SCE - Level 3 - Congestion revenue rights - Valuation, Market Approach $ in Millions | Mar. 31, 2025 USD ($) $ / MWh | Dec. 31, 2024 USD ($) $ / MWh
--- | --- | ---
Fair Value Measurements |  |
Fair value, Level 3 assets | $ | $ 156 | $ 212
Fair value, Level 3 liabilities | $ | $ 0 | $ 0
Minimum |  |
Fair Value Measurements |  |
Unobservable inputs | (7.39) | (4.64)
Maximum |  |
Fair Value Measurements |  |
Unobservable inputs | 50,048.16 | 50,048.16
Weighted Average |  |
Fair Value Measurements |  |
Unobservable inputs | 28.09 | 27.20

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