WILDFIRE-RELATED CONTINGENCIES (2019 Kincade Fire, 2021 Dixie Fire and 2022 Mosquito Fire) (Details) numberOfPeople in Millions, $ in Millions			3 Months Ended			9 Months Ended
	Jul. 13, 2021 USD ($) a structure injury	Nov. 04, 2019 numberOfPeople	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2025 USD ($)	Oct. 15, 2025 numberOfClaimHolder company plaintiff complaint notice	Dec. 31, 2024 USD ($)	Sep. 06, 2022 a structure injury numberOfFatality	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
Loss contingency liability			$ 1,325			$ 1,325		$ 1,225
Potential loss contingency				$ 50	$ 50
Insurance receivable fully collected			430			430
Liability insurance coverage, insurance receivable. fully recoveries			65			65
2019 Kincade Fire | Subsequent Event
Loss Contingencies [Line Items]
Number of complaints (complaint) | complaint							135
Number of plaintiffs represented by complaints | plaintiff							3,014
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
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
Estimated losses			2,125			2,125		1,925
Loss contingency accrual, period increase (decrease)			50	150
Loss contingency, costs incurred	$ 650
Insurance receivable			523			523
Probable of recovery						2,274
2021 Dixie fire | Wildfire Fund
Loss Contingencies [Line Items]
Probable of recovery						1,125
Probable of recovery received						609
2021 Dixie fire | FERC TO rates
Loss Contingencies [Line Items]
Probable of recovery						96
2021 Dixie fire | WEMA
Loss Contingencies [Line Items]
Probable of recovery						530
2021 Dixie fire | National Park
Loss Contingencies [Line Items]
Number of acres burned (acre) | a	70,000
2021 Dixie fire | National Forrest
Loss Contingencies [Line Items]
Number of acres burned (acre) | a	685,000
2021 Dixie fire | Subsequent Event
Loss Contingencies [Line Items]
Number of complaints (complaint) | numberOfClaimHolder							186
Number of plaintiffs represented by complaints | numberOfClaimHolder							8,919
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			250			250		$ 100
Number of residential structures destroyed (structure) | structure									44
Number of detached structures destroyed (structure) | structure									40
Loss contingency accrual, period increase (decrease)				$ 150
Insurance receivable			$ 256			256
Probable of recovery						317
Percentage of fire contained									100.00%
2022 Mosquito fire | Wildfire Fund
Loss Contingencies [Line Items]
Probable of recovery						0
2022 Mosquito fire | FERC TO rates
Loss Contingencies [Line Items]
Probable of recovery						7
2022 Mosquito fire | WEMA
Loss Contingencies [Line Items]
Probable of recovery						$ 54
2022 Mosquito fire | Subsequent Event
Loss Contingencies [Line Items]
Number of complaints (complaint) | complaint							30
Number of plaintiffs represented by complaints | notice							2,956
Number of public entities who files complaints | company							6