WILDFIRE-RELATED CONTINGENCIES (Wildfire Fund) (Details) - USD ($) $ in Millions	Aug. 23, 2019	Jul. 12, 2020	Jun. 30, 2020	Aug. 02, 2019	Jul. 12, 2019
Loss Contingencies [Line Items]
Wildfire-related claims			$ 25,500
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
Expected wildfire fund allocation metric, initial capital expenditure	5,000
Allocation	$ 3,210
Initial contribution payment			4,800
Annual contribution, first payment			193
Subsequent event
Loss Contingencies [Line Items]
Percentage of claim limit		40.00%
2018 Camp Fire and 2017 Northern California Wildfires
Loss Contingencies [Line Items]
Wildfire-related claims				$ 105
Claimant payments			$ 100