WILDFIRE-RELATED CONTINGENCIES (Pre-petition Wildfire-Related Claims and Discharge Upon Plan Effective Date) (Details) equityUnit in Thousands, $ in Millions			9 Months Ended
	Aug. 03, 2020 equityUnit shares	Jul. 01, 2020 USD ($) shares	Sep. 30, 2020 USD ($)	Jun. 11, 2020	Sep. 22, 2019 USD ($)
Loss Contingencies [Line Items]
Transfer of shares to Fire Victim Trust (in shares) | shares		477,000,000
Transfer of shares to Fire Victim Trust, additional (in shares) | shares	748,415
Accrued environmental loss contingencies, current, elimination			$ 12,150.0
Plan of reorganization, tax benefits payment agreement		$ 1,350.0
Subrogation claims, professional fees					$ 55.0
Equity Units Offering
Loss Contingencies [Line Items]
Sale of stock, number of equity units issued and sold in transaction, additional (in equity units) | equityUnit	1,450
Settling Public Entities
Loss Contingencies [Line Items]
Litigation payment		1,000.0
Litigation, segregated reimbursement fund		10.0
Fire Victim Trust
Loss Contingencies [Line Items]
Litigation payment, fund, cash		5,400.0
Litigation payment, additional funded, deferred		$ 1,350.0
Transfer of shares to Fire Victim Trust (in shares) | shares		477,000,000.0
Percentage of common stock owned, Fire Victim Trust if common issues additional shares		22.19%		22.19%
Transfer of shares to Fire Victim Trust, additional (in shares) | shares	748,415
Subrogation Wildfire Trust
Loss Contingencies [Line Items]
Litigation payment, fund, cash		$ 11,000.0
Litigation payment		43.0
Subrogation claims, professional fees		$ 52.0
Pacific Gas & Electric Co
Loss Contingencies [Line Items]
Subrogation claims, professional fees			53.0
Subrogation insurance claims			11,000.0
Professional fees extinguished			47.5
Pacific Gas & Electric Co | All Other Wildfire-related Claims
Loss Contingencies [Line Items]
Wildfire-related claims			13,500.0
Pacific Gas & Electric Co | Public Entity Wildfire Claims | Settling Public Entities
Loss Contingencies [Line Items]
Wildfire-related claims			$ 1,000.0