WILDFIRE-RELATED CONTINGENCIES (Schedule of Loss Accrual) (Details) - 2015 Butte fire - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loss Contingency Accrual [Roll Forward]
Loss accrual, beginning balance	$ 561	$ 690	$ 0
Accrued losses	0	350	750
Payments	(335)	(479)	(60)
Loss accrual, ending balance	226	$ 561	$ 690
Pacific Gas & Electric Co
Loss Contingency Accrual [Roll Forward]
Settlement agreement paid	874
Settlement agreements entered	$ 904