WILDFIRE-RELATED CONTINGENCIES (Wildfire Fund) (Details) - USD ($) $ in Millions	Aug. 23, 2019	Sep. 30, 2020	Jul. 12, 2020	Jul. 12, 2019
Commitments and Contingencies Disclosure [Abstract]
Disallowance cap, transmission and distribution equity rate base				$ 2,400
Initial safety certification, period	12 months
Initial safety certification, documentation provided, period	90 days
Expected capitalization, proceeds of bond	$ 10,500
Expected capitalization, initial contribution	7,500
Expected capitalization, annual contribution	$ 300
Expected wildfire fund allocation metric, percentage	64.20%
Expected wildfire fund allocation metric, initial contribution	$ 4,800
Expected wildfire fund allocation metric, annual contributions	193
Allocation	$ 3,210
Initial contribution payment		$ 4,800
Annual contribution, first payment		$ 193
Percentage of claim limit			40.00%