WILDFIRE-RELATED CONTINGENCIES (Wildfire Assistance Fund) (Details) - USD ($) $ in Millions	Nov. 01, 2019	Sep. 30, 2019	Aug. 02, 2019	Jul. 12, 2019	May 24, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Wildfire-related claims		$ 0				$ 14,226
Disallowance cap, transmission and distribution equity rate base				$ 2,300
Expected wildfire fund allocation metric, initial contribution				$ 4,800
Expected wildfire fund allocation metric, percentage				64.20%
Expected wildfire fund allocation metric, annual contributions				$ 193
2018 Camp Fire and 2017 Northern California Wildfires
Loss Contingencies [Line Items]
Wildfire-related claims		$ 100	$ 105
Wildfire Assistance Fund, amount sought, portion available for administrative expenses					$ 5
Subsequent event
Loss Contingencies [Line Items]
Claimant payments	$ 22