WILDFIRE-RELATED CONTINGENCIES (Wildfire Fund) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Aug. 02, 2019	Jul. 12, 2019
Loss Contingencies [Line Items]
Disallowance cap, transmission and distribution equity rate base			$ 2,300
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
2018 Camp Fire and 2017 Northern California Wildfires
Loss Contingencies [Line Items]
Wildfire assistance fund, amount funded		$ 105
Wildfire assistance fund, claimant payments	$ 64