WILDFIRE- RELATED CONTINGENCIES (Restructuring Support Agreement) (Details) $ in Millions	Sep. 22, 2019 USD ($)	Jul. 01, 2020	Jun. 30, 2020 USD ($)	Dec. 06, 2019 USD ($)
Loss Contingencies [Line Items]
TCC claims settlement, amount	$ 11,000
Subrogation claims, professional fees	$ 55
Fire Victim Trust | Subsequent event
Loss Contingencies [Line Items]
Percentage of common stock owned, Fire Victim Trust if common issues additional shares		22.19%
Pacific Gas & Electric Co
Loss Contingencies [Line Items]
Subrogation claims, professional fees			$ 52
Cash				$ 1,350
Multiplier, normalized estimated net income				14.9
Number of fully diluted shares of the reorganized, perent				20.90%
Pacific Gas & Electric Co | Effective Date
Loss Contingencies [Line Items]
Cash contribution by company				$ 5,400
Pacific Gas & Electric Co | On Or Before January 15, 2021
Loss Contingencies [Line Items]
Cash				650
Pacific Gas & Electric Co | On Or Before January 15, 2022
Loss Contingencies [Line Items]
Cash				$ 1,350