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Commitments and Contingencies - Environmental Remediation (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($) site | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Commitments and Contingencies |  |  |
Environmental loss contingency, statement of financial position flag | Other deferred credits and other long-term liabilities |  |
SCE |  |  |
Commitments and Contingencies |  |  |
Recorded estimated minimum liability | $ 235 |  |
Environmental remediation regulatory assets | 222 |  |
Expected recovery from incentive mechanism | $ 35 |  |
Expected recovery from incentive mechanism (percent) | 90.00% |  |
Recovery through customer rates | $ 187 |  |
Recovery through customer rates (percent) | 100.00% |  |
Clean up (period) | 35 years |  |
Expected remediation costs, low end of range | $ 9 |  |
Expected remediation costs, high end of range | 21 |  |
Environmental remediation expense | $ 17 | $ 11 | $ 7
Material sites | SCE |  |  |
Commitments and Contingencies |  |  |
Identified remediation sites (number) | site | 21 |  |
Minimum estimated liability | $ 1 |  |
Recorded estimated minimum liability | 232 |  |
Cost may exceed liability | 118 |  |
Material sites | SCE | San Onofre |  |  |
Commitments and Contingencies |  |  |
Recorded estimated minimum liability | $ 154 |  |
Immaterial sites | SCE |  |  |
Commitments and Contingencies |  |  |
Identified remediation sites (number) | site | 19 |  |
Recorded estimated minimum liability | $ 3 |  |
Cost may exceed liability | $ 2 |  |

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