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Commitments and Contingencies (Environmental Remediation) (Details) - SCE $ in Millions | 3 Months Ended
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Mar. 31, 2021 USD ($) site
Jointly Owned Utility Plant Interests [Line Items] |
Recorded estimated minimum liability | $ 278
Environmental remediation regulatory assets | 265
Expected recovery from incentive mechanism | $ 39
Expected recovery from incentive mechanism (percent) | 90.00%
Recovery through customer rates | $ 226
Recovery through customer rates (percent) | 100.00%
Environmental remediation expense | $ 2
Clean up (period) | 30 years
Expected remediation costs, low end of range | $ 13
Expected remediation costs, high end of range | $ 30
Material sites |
Jointly Owned Utility Plant Interests [Line Items] |
Identified remediation sites (number) | site | 27
Minimum estimated liability | $ 1
Recorded estimated minimum liability | 274
Cost may exceed liability | 117
Material sites | San Onofre |
Jointly Owned Utility Plant Interests [Line Items] |
Recorded estimated minimum liability | $ 172
Immaterial sites |
Jointly Owned Utility Plant Interests [Line Items] |
Identified remediation sites (number) | site | 15
Recorded estimated minimum liability | $ 4
Cost may exceed liability | $ 8

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