WILDFIRE-RELATED CONTINGENCIES (Insurance Receivable) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($)
Insurance Receivable [Roll Forward]
Insurance receivable, beginning balance	$ 282
Accrued insurance recoveries	53
Reimbursements	(73)
Insurance receivable, ending balance	262
2021 Dixie fire
Loss Contingencies [Line Items]
Insurance receivable	521
Insurance Receivable [Roll Forward]
Insurance receivable, beginning balance	1
Accrued insurance recoveries	0
Reimbursements	0
Insurance receivable, ending balance	1
2022 Mosquito fire
Loss Contingencies [Line Items]
Insurance receivable	416
Insurance Receivable [Roll Forward]
Insurance receivable, beginning balance	281
Accrued insurance recoveries	53
Reimbursements	(73)
Insurance receivable, ending balance	$ 261