WILDFIRE-RELATED CONTINGENCIES (Loss Recoveries) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($)
Loss Contingencies [Line Items]
Probable recoveries	$ 1,156
Insurance
Loss Contingencies [Line Items]
Probable recoveries	569
FERC
Loss Contingencies [Line Items]
Probable recoveries	98
WEMA
Loss Contingencies [Line Items]
Probable recoveries	339
AB 1054 Wildfire Fund
Loss Contingencies [Line Items]
Probable recoveries	$ 150