WILDFIRE- RELATED CONTINGENCIES (Restructuring Support Agreement) (Details) $ in Millions	Jan. 15, 2021 USD ($)	Jul. 01, 2020 USD ($)	Jun. 12, 2020	Dec. 06, 2019 USD ($)
Loss Contingencies [Line Items]
Plan of reorganization, future tax benefits payment agreement		$ 1,350
Payment of plan of reorganization, future tax benefits payment agreement	$ 758
Plan of reorganization, future tax benefits payment agreement, remaining portion to be paid	$ 592
Minimum
Loss Contingencies [Line Items]
Plan of reorganization, tax benefits payment agreement		$ 650
Fire Victim Trust
Loss Contingencies [Line Items]
Percentage of common stock owned, Fire Victim Trust if common issues additional shares			22.19%
Pacific Gas & Electric Co (Utility)
Loss Contingencies [Line Items]
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 (Utility) | Effective Date
Loss Contingencies [Line Items]
Cash contribution by company				$ 5,400
Pacific Gas & Electric Co (Utility) | On Or Before January 15, 2021
Loss Contingencies [Line Items]
Cash				758
Pacific Gas & Electric Co (Utility) | On Or Before January 15, 2022
Loss Contingencies [Line Items]
Cash				$ 592