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WILDFIRE-RELATED CONTINGENCIES (2019 Kincade Fire, 2020 Zogg Fire, 2021 Dixie Fire and 2022 Mosquito Fire) (Details) numberOfPeople in Millions, $ in Millions |  |  |  |  | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |
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Oct. 18, 2023 USD ($) | Jan. 05, 2022 USD ($) | Oct. 29, 2021 USD ($) a | Nov. 04, 2019 numberOfPeople | Dec. 31, 2023 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Feb. 14, 2024 numberOfClaimHolder complaint plaintiff notice | Oct. 09, 2023 USD ($) | Jan. 17, 2023 USD ($) | Sep. 06, 2022 a structure injury numberOfFatality | Aug. 31, 2022 USD ($) | Apr. 30, 2022 USD ($) | Jul. 13, 2021 a structure injury | Sep. 27, 2020 a structure fatality injury | Oct. 23, 2019 a numberOfFatality structure injury
2019 Kincade fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of acres burned (acre) | a |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 77,758
Number of fatalities (fatality) | numberOfFatality |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0
Number of injuries | injury |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4
Number of structures destroyed (structure) | structure |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 374
Number of structures damaged (structure) | structure |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60
Number of people part of mandatory evacuation order | numberOfPeople |  |  |  | 0.2 |  |  |  |  |  |  |  |  |  |  |  |  |
Fire fighting costs recovery requested |  | $ 90.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Potential loss contingency |  |  |  |  | $ 100.0 |  |  | $ 1,025.0 |  |  |  |  |  |  |  |  |
Loss contingency liability |  |  |  |  | 1,125.0 |  | $ 1,125.0 |  |  |  |  |  |  |  |  |  |
Insurance receivable |  |  |  |  | 430.0 |  | 430.0 |  |  |  |  |  |  |  |  |  |
2020 Zogg fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of acres burned (acre) | a |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 56,338 |
Number of fatalities (fatality) | fatality |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |
Number of injuries | injury |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |
Number of structures destroyed (structure) | structure |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 204 |
Number of structures damaged (structure) | structure |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27 |
Potential loss contingency |  |  |  |  |  |  |  | 400.0 |  |  |  |  |  |  |  |  |
Insurance receivable |  |  |  |  | 374.0 |  | 374.0 |  |  |  |  |  |  |  |  |  |
Liability insurance coverage |  |  |  |  | 611.0 |  | 611.0 |  |  |  |  |  |  |  |  |  |
Initial self-insured retention per occurrence |  |  |  |  | 60.0 |  | 60.0 |  |  |  |  |  |  |  |  |  |
Legal fees |  |  |  |  |  |  | 34.0 |  |  |  |  |  |  |  |  |  |
Insurance Coverage for Wildfire Events |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liability insurance coverage |  |  |  |  |  |  |  |  |  |  |  |  | $ 600.0 | $ 340.0 |  |  |
Initial self-insured retention per occurrence |  |  |  |  | 60.0 |  | 60.0 |  |  |  |  |  |  |  |  |  |
2021 Dixie fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of acres burned (acre) | a |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 963,309 |  |
Number of structures destroyed (structure) | structure |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,311 |  |
Number of structures damaged (structure) | structure |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 94 |  |
Potential loss contingency |  |  |  |  |  | $ 425.0 |  |  |  |  |  |  |  |  |  |  |
Loss contingency liability |  |  |  |  |  |  |  | $ 1,175.0 |  |  |  |  |  |  |  |  |
Insurance receivable |  |  |  |  | 526.0 |  | 526.0 |  |  |  |  |  |  |  |  |  |
Liability insurance coverage |  |  |  |  | 900.0 |  | 900.0 |  |  |  |  |  |  |  |  |  |
Number of residential structures destroyed (structure) | structure |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 763 |  |
Number of multi-family residential structures destroyed (structure) | structure |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 |  |
Number of commercial residential structures destroyed (structure) | structure |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8 |  |
Number of commercial non-residential structures destroyed (structure) | structure |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 148 |  |
Number of detached structures destroyed (structure) | structure |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 466 |  |
Number of first responder injuries (injury) | injury |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  |
Loss contingency approximate cost | $ 40.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss contingency approximate cost, period | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated losses |  |  |  |  | 1,600.0 |  | 1,600.0 |  |  |  |  |  |  |  |  |  |
Loss contingency, costs incurred |  |  | $ 650.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Probable of recovery |  |  |  |  |  |  | 1,687.0 |  |  |  |  |  |  |  |  |  |
2021 Dixie fire | California General Fund |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement amount proposed |  |  |  |  |  |  |  |  |  | $ 2.5 | $ 24.0 |  |  |  |  |  |
2021 Dixie fire | 2021 Dixie Fire, Tribes Impacted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement amount proposed |  |  |  |  |  |  |  |  |  | $ 2.5 |  |  |  |  |  |  |
2021 Dixie fire | Other Current Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Potential loss contingency |  |  |  |  |  |  | 5.0 |  |  |  |  |  |  |  |  |  |
2022 Mosquito fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of acres burned (acre) | a |  |  |  |  |  |  |  |  |  |  |  | 76,788 |  |  |  |  |
Number of fatalities (fatality) | numberOfFatality |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Number of injuries | injury |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Number of structures destroyed (structure) | structure |  |  |  |  |  |  |  |  |  |  |  | 78 |  |  |  |  |
Number of structures damaged (structure) | structure |  |  |  |  |  |  |  |  |  |  |  | 13 |  |  |  |  |
Loss contingency liability |  |  |  |  | 100.0 |  | 100.0 |  |  |  |  |  |  |  |  |  |
Insurance receivable |  |  |  |  | 63.0 |  | 63.0 |  |  |  |  |  |  |  |  |  |
Liability insurance coverage |  |  |  |  | $ 733.0 |  | 733.0 |  |  |  |  |  |  |  |  |  |
Number of residential structures destroyed (structure) | structure |  |  |  |  |  |  |  |  |  |  |  | 44 |  |  |  |  |
Number of detached structures destroyed (structure) | structure |  |  |  |  |  |  |  |  |  |  |  | 40 |  |  |  |  |
Probable of recovery |  |  |  |  |  |  | 123.0 |  |  |  |  |  |  |  |  |  |
Percentage of fire contained |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
Subsequent Event | 2019 Kincade fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of complaints (complaint) | complaint |  |  |  |  |  |  |  |  | 132 |  |  |  |  |  |  |  |
Number of plaintiffs represented by complaints | plaintiff |  |  |  |  |  |  |  |  | 2,913 |  |  |  |  |  |  |  |
Subsequent Event | 2021 Dixie fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of complaints (complaint) | numberOfClaimHolder |  |  |  |  |  |  |  |  | 161 |  |  |  |  |  |  |  |
Number of plaintiffs represented by complaints | numberOfClaimHolder |  |  |  |  |  |  |  |  | 8,387 |  |  |  |  |  |  |  |
Subsequent Event | 2022 Mosquito fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of complaints (complaint) | complaint |  |  |  |  |  |  |  |  | 6 |  |  |  |  |  |  |  |
Number of plaintiffs represented by complaints | notice |  |  |  |  |  |  |  |  | 233 |  |  |  |  |  |  |  |
FERC TO rates | 2021 Dixie fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Probable of recovery |  |  |  |  |  |  | 91.0 |  |  |  |  |  |  |  |  |  |
FERC TO rates | 2022 Mosquito fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Probable of recovery |  |  |  |  |  |  | 8.0 |  |  |  |  |  |  |  |  |  |
WEMA | 2021 Dixie fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Probable of recovery |  |  |  |  |  |  | 470.0 |  |  |  |  |  |  |  |  |  |
WEMA | 2022 Mosquito fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Probable of recovery |  |  |  |  |  |  | $ 52.0 |  |  |  |  |  |  |  |  |  |
National Park | 2021 Dixie fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of acres burned (acre) | a |  |  | 70,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
National Forrest | 2021 Dixie fire |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of acres burned (acre) | a |  |  | 685,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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