WILDFIRE-RELATED CONTINGENCIES (2018 Camp Fire and 2017 Northern California Wildfires Background) (Details) - Pacific Gas & Electric Co	Nov. 08, 2018 a building fatality	Oct. 30, 2017 a structure fatality wildfire
2018 Camp Fire
Loss Contingencies [Line Items]
Number of acres burned (acre) | a	153,336
Number of fatalities (fatality) | fatality	85
Number of other buildings destroyed (structures) | building	18,804
2017 Northern California wildfires
Loss Contingencies [Line Items]
Number of acres burned (acre) | a		245,000
Number of fatalities (fatality) | fatality		44
Number of wildfires (wildfire) | wildfire		21
Number of structures destroyed (structure) | structure		8,900