WILDFIRE-RELATED CONTINGENCIES (2019 Kincade Fire, 2021 Dixie Fire and 2022 Mosquito Fire) (Details) numberOfPeople in Millions, $ in Millions			3 Months Ended
	Jul. 13, 2021 USD ($) a structure injury	Nov. 04, 2019 numberOfPeople	Mar. 31, 2025 USD ($)	Apr. 16, 2025 notice plaintiff numberOfClaimHolder company complaint	Dec. 31, 2024 USD ($)	Sep. 06, 2022 a structure numberOfFatality injury	Oct. 23, 2019 a numberOfFatality injury structure
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			$ 1,275		$ 1,225
Potential loss contingency			50
Insurance receivable fully collected			430
2019 Kincade Fire | Subsequent Event
Loss Contingencies [Line Items]
Number of complaints (complaint) | complaint				134
Number of plaintiffs represented by complaints | plaintiff				2,983
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					1,925
Loss contingency, costs incurred	$ 650
Insurance receivable			527
Probable of recovery			2,061
2021 Dixie fire | Subsequent Event
Loss Contingencies [Line Items]
Number of complaints (complaint) | numberOfClaimHolder				183
Number of plaintiffs represented by complaints | numberOfClaimHolder				8,687
2021 Dixie fire | Wildfire Fund
Loss Contingencies [Line Items]
Probable of recovery			925
Probable of recovery received			350
2021 Dixie fire | FERC TO rates
Loss Contingencies [Line Items]
Probable of recovery			94
2021 Dixie fire | WEMA
Loss Contingencies [Line Items]
Probable of recovery			515
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					$ 100
Number of residential structures destroyed (structure) | structure						44
Number of detached structures destroyed (structure) | structure						40
Insurance receivable			96
Probable of recovery			157
Percentage of fire contained						100.00%
2022 Mosquito fire | Subsequent Event
Loss Contingencies [Line Items]
Number of complaints (complaint) | complaint				25
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			7
2022 Mosquito fire | WEMA
Loss Contingencies [Line Items]
Probable of recovery			$ 54