WILDFIRE-RELATED CONTINGENCIES (Third-Party Claims, Investigations and Other Proceedings Related to the 2018 Camp Fire and 2017 Northern California Wildfires) (Details) - Pending Litigation	Jan. 28, 2019 plaintiff complaint
Complaints Against PG&E Corporation and the Utility in Sacramento County Superior Court | 2018 Camp Fire
Loss Contingencies [Line Items]
Number of lawsuits filed against company (lawsuit, complaint)	100
Number of plaintiffs in lawsuit (at least) (plaintiff) | plaintiff	4,200
Complaints Against PG&E Corporation and the Utility in Sacramento County Superior Court, Classified as Class Action | 2018 Camp Fire
Loss Contingencies [Line Items]
Number of lawsuits filed against company (lawsuit, complaint)	9
Complaints Against PG&E Corporation and the Utility in San Francisco Counties Superior Courts | 2017 Northern California wildfires
Loss Contingencies [Line Items]
Number of lawsuits filed against company (lawsuit, complaint)	750
Number of plaintiffs in lawsuit (at least) (plaintiff) | plaintiff	3,800
Lawsuits Against PG&E Corporation and the Utility in the Sonoma, Napa and San Francisco Counties Superior Courts, Classified As Class Actions | 2017 Northern California wildfires
Loss Contingencies [Line Items]
Number of lawsuits filed against company (lawsuit, complaint)	5
Subrogation Complaints Against PG&E Corporation and the Utility in San Francisco County Superior Courts | 2017 Northern California wildfires
Loss Contingencies [Line Items]
Number of lawsuits filed against company (lawsuit, complaint)	52
Subrogation Complaints Against PG&E Corporation and the Utility in Sacramento County Superior Court | 2017 Northern California wildfires
Loss Contingencies [Line Items]
Number of lawsuits filed against company (lawsuit, complaint)	39