WILDFIRE-RELATED CONTINGENCIES (Wildfire Fund) (Details) - USD ($) $ in Millions	Jul. 12, 2019	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Disallowance cap, transmission and distribution equity rate base	$ 2,700
Initial safety certification, period	12 months
Initial safety certification, documentation provided, period	90 days
Expected capitalization, proceeds of bond	$ 10,500	$ 10,500
Expected capitalization, initial contribution	7,500	7,500
Expected capitalization, annual contribution	300	$ 300
Allocation	$ 3,210