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	9 Months Ended
	Oct. 09, 2023 USD ($)	Jan. 05, 2022 USD ($)	Jul. 13, 2021 USD ($) a structure injury	Nov. 04, 2019 numberOfPeople	Sep. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Oct. 30, 2024 numberOfClaimHolder complaint notice plaintiff	Dec. 31, 2023 USD ($)	Sep. 06, 2022 a structure numberOfFatality injury	Oct. 23, 2019 a injury structure numberOfFatality
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
Loss contingency liability					$ 1,200.0	$ 1,200.0		$ 1,125.0
Potential loss contingency					75.0
Insurance receivable fully collected								430.0
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
Loss contingency liability								1,600.0
Potential loss contingency	$ 5.0				275.0
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								1,875.0
Loss contingency, costs incurred			$ 650.0
Insurance receivable					525.0	525.0
Probable of recovery						1,998.0
2021 Dixie fire | California General Fund
Loss Contingencies [Line Items]
Settlement amount proposed	$ 2.5
2021 Dixie fire | 2021 Dixie Fire, Tribes Impacted
Loss Contingencies [Line Items]
Settlement amount proposed	$ 2.5
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
Number of residential structures destroyed (structure) | structure									44
Number of detached structures destroyed (structure) | structure									40
Insurance receivable					$ 86.0	86.0
Probable of recovery						146.0
Percentage of fire contained									100.00%
Subsequent Event | 2019 Kincade Fire
Loss Contingencies [Line Items]
Number of complaints (complaint) | complaint							133
Number of plaintiffs represented by complaints | plaintiff							2,960
Subsequent Event | 2021 Dixie fire
Loss Contingencies [Line Items]
Number of complaints (complaint) | numberOfClaimHolder							181
Number of plaintiffs represented by complaints | numberOfClaimHolder							8,626
Subsequent Event | 2022 Mosquito fire
Loss Contingencies [Line Items]
Number of complaints (complaint) | complaint							24
Number of plaintiffs represented by complaints | notice							2,739
Wildfire Fund | 2021 Dixie fire
Loss Contingencies [Line Items]
Probable of recovery						875.0
Probable of recovery received						39.0
Wildfire Fund | 2022 Mosquito fire
Loss Contingencies [Line Items]
Probable of recovery						0.0
FERC TO rates | 2021 Dixie fire
Loss Contingencies [Line Items]
Probable of recovery						94.0
FERC TO rates | 2022 Mosquito fire
Loss Contingencies [Line Items]
Probable of recovery						7.0
WEMA | 2021 Dixie fire
Loss Contingencies [Line Items]
Probable of recovery						504.0
WEMA | 2022 Mosquito fire
Loss Contingencies [Line Items]
Probable of recovery						$ 53.0
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