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SAN ONOFRE NUCLEAR GENERATING STATION - NARRATIVE (Details) - San Diego Gas and Electric Company - USD ($) $ in Millions | 6 Months Ended |
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Jun. 30, 2023 | Dec. 31, 2022
Jointly Owned Nuclear Power Plant |  |
Jointly Owned Utility Plant Interests [Line Items] |  |
Jointly owned utility plant, proportionate ownership share (as a percent) | 20.00% |
Anticipated term of dismantlement work | 10 years |
Percent of dismantlement work expense (as a percent) | 20.00% |
ARO related to decommissioning costs | $ 523 |
SONGS 2 and 3 Decommissioning |  |
Jointly Owned Utility Plant Interests [Line Items] |  |
Nuclear decommissioning trust authorized withdrawal amount |  | $ 81

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- Definition The proportionate share of interest (percent) in a jointly owned utility plant. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479960/980-360-S99-1 + Details
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