WILDFIRE-RELATED CONTINGENCIES (2019 Kincade Fire, 2021 Dixie Fire and 2022 Mosquito Fire) (Details) numberOfPeople in Millions, $ in Millions			3 Months Ended		6 Months Ended
	Jul. 13, 2021 USD ($) a injury structure	Nov. 04, 2019 numberOfPeople	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Jun. 30, 2025 USD ($)	Jul. 23, 2025 complaint numberOfClaimHolder company plaintiff notice	Dec. 31, 2024 USD ($)	Sep. 06, 2022 a structure numberOfFatality injury	Oct. 23, 2019 a structure numberOfFatality 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
Loss contingency liability			$ 1,325		$ 1,325		$ 1,225
Potential loss contingency			50	$ 50
Insurance receivable fully collected			430		430
2019 Kincade Fire | Subsequent Event
Loss Contingencies [Line Items]
Number of complaints (complaint) | complaint						135
Number of plaintiffs represented by complaints | plaintiff						2,989
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 accrual, period increase (decrease)			150
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			2,075		2,075		1,925
Loss contingency, costs incurred	$ 650
Insurance receivable			523		523
Probable of recovery					2,219
2021 Dixie fire | Subsequent Event
Loss Contingencies [Line Items]
Number of complaints (complaint) | numberOfClaimHolder						184
Number of plaintiffs represented by complaints | numberOfClaimHolder						8,894
2021 Dixie fire | Wildfire Fund
Loss Contingencies [Line Items]
Probable of recovery					1,075
Probable of recovery received					445
2021 Dixie fire | FERC TO rates
Loss Contingencies [Line Items]
Probable of recovery					95
2021 Dixie fire | WEMA
Loss Contingencies [Line Items]
Probable of recovery					526
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
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
Loss contingency accrual, period increase (decrease)			150
Number of residential structures destroyed (structure) | structure								44
Number of detached structures destroyed (structure) | structure								40
Insurance receivable			$ 251		251
Probable of recovery					311
Percentage of fire contained								100.00%
2022 Mosquito fire | Subsequent Event
Loss Contingencies [Line Items]
Number of complaints (complaint) | complaint						26
Number of plaintiffs represented by complaints | notice						2,716
Number of public entities who files complaints | company						6
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					6
2022 Mosquito fire | WEMA
Loss Contingencies [Line Items]
Probable of recovery					$ 54