WILDFIRE-RELATED CONTINGENCIES (Insurance Receivable) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Insurance Receivable [Roll Forward]
Insurance Receivable, Beginning Balance	$ 794
Accrued insurance recoveries	13
Reimbursements	(369)
Insurance Receivable, Ending Balance	438
2022 Mosquito fire
Insurance Receivable [Roll Forward]
Insurance Receivable, Beginning Balance	45
Accrued insurance recoveries	13
Reimbursements	0
Insurance Receivable, Ending Balance	58
Insurance receivable	58
2021 Dixie fire
Insurance Receivable [Roll Forward]
Insurance Receivable, Beginning Balance	530
Accrued insurance recoveries	(3)
Reimbursements	(200)
Insurance Receivable, Ending Balance	327
Insurance receivable	527
2020 Zogg fire
Insurance Receivable [Roll Forward]
Insurance Receivable, Beginning Balance	118
Accrued insurance recoveries	3
Reimbursements	(68)
Insurance Receivable, Ending Balance	53
Insurance receivable	373
2019 Kincade fire
Insurance Receivable [Roll Forward]
Insurance Receivable, Beginning Balance	101
Accrued insurance recoveries	0
Reimbursements	(101)
Insurance Receivable, Ending Balance	0
Insurance receivable	$ 430