WILDFIRE-RELATED CONTINGENCIES (2017 Northern California Wildfires Background) (Details) - Pacific Gas & Electric Co a in Thousands	Jun. 30, 2019 wildfire report	Jun. 27, 2019 wildfire violation	Jan. 04, 2019 wildfire	Jun. 30, 2018 wildfire	Oct. 30, 2017 a wildfire fatality structure
2017 Northern California wildfires
Loss Contingencies [Line Items]
Number of wildfires (wildfire) | wildfire			18		21
Number of acres burned (acre) | a					245
Number of structures destroyed (structure) | structure					8,900
Number of fatalities (fatality) | fatality					44
Number of investigation reports issued (report) | report	19
Number of supplementary investigation reports issued (report) | report	2
Number of fires in which determination has been reported on (wildfire) | wildfire	21			16
Number of alleged violations (violation) | violation		27
Alleged violations, number of wildfires (wildfire) | wildfire		12
Cherokee, La Porte and Tubbs Fires
Loss Contingencies [Line Items]
Number of alleged violations (violation) | violation		0
37 Fire
Loss Contingencies [Line Items]
Number of alleged violations (violation) | violation		0