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WILDFIRE-RELATED CONTINGENCIES (2015 Butte Fire) (Details)
household in Thousands, $ in Millions
1 Months Ended 2 Months Ended 9 Months Ended
Jan. 28, 2019
household
plaintiff
complaint
contractor
Sep. 06, 2018
plaintiff
Mar. 02, 2018
USD ($)
Mar. 01, 2018
USD ($)
Apr. 13, 2017
USD ($)
Jan. 29, 2019
USD ($)
Nov. 30, 2018
USD ($)
May 31, 2017
USD ($)
Sep. 30, 2018
entity
district
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
May 01, 2018
decision
May 23, 2016
contractor
Apr. 28, 2016
a
outbuilding
fatality
structure
home
comercial_property
Loss Contingencies [Line Items]                              
Reimbursements                   $ 35.0 $ 64.0        
2015 Butte fire                              
Loss Contingencies [Line Items]                              
Payments for claims           $ 14.0                  
Insurance settlements receivable                   50.0   $ 85.0      
Reimbursements                   35.0          
Pacific Gas & Electric Co                              
Loss Contingencies [Line Items]                              
Reimbursements                   35.0 $ 64.0        
Pacific Gas & Electric Co | 2015 Butte fire                              
Loss Contingencies [Line Items]                              
Number of acres burned (acre) | a                             70,868
Number of fatalities caused by fire (fatality) | fatality                             2
Number of homes destroyed by fire (home) | home                             549
Number of outbuildings damaged by fire (outbuilding) | outbuilding                             368
Number of commercial properties damaged by fire (commercial property) | comercial_property                             4
Number of structures damaged (structure) | structure                             44
Number of vegetation management contractors (contractor) | contractor                           2  
Number of complaints filed (complaint) | complaint 95                            
Number of plaintiffs (plaintiff) | plaintiff 3,900                            
Number of households represented in court (household) | household 2                            
Number of vegetation management contractors dismissed from complaints (contractor) | contractor 2                            
Number of plaintiffs, smaller public entities (plaintiff) | entity                 4            
Number of plaintiffs, fire districts (plaintiff) | district                 3            
Fire fighting costs recovery requested         $ 87.0                    
Value of claims brought against the company               $ 190.0              
Reasonably possible loss to be incurred                   1,100.0          
Loss contingency liability                   212.0   226.0      
Settlement agreement paid                   888.0          
Settlement agreements entered                   904.0          
Coverage for third party liability                   922.0          
Probable insurance recoveries                   922.0          
Cumulative reimbursements from insurance policies                   60.0          
Insurance settlements receivable                   50.0   $ 85.0      
Reimbursements                   35.0          
FEMA | 2015 Butte fire                              
Loss Contingencies [Line Items]                              
Amount of claims filed                   161.0          
U.S. Department of the Interior | 2015 Butte fire                              
Loss Contingencies [Line Items]                              
Amount of claims filed                   63.0          
Cal Fire | 2015 Butte fire                              
Loss Contingencies [Line Items]                              
Amount of claims filed                   105.0          
OES | 2015 Butte fire                              
Loss Contingencies [Line Items]                              
Amount of claims filed                   $ 107.0          
Agreement Reached in Litigation to Stipulate to Judgment on Inverse Condemnation Grounds | Pacific Gas & Electric Co | 2015 Butte fire                              
Loss Contingencies [Line Items]                              
Number of previous appellate courts decisions (decision) | decision                         2    
Number of plaintiffs in lawsuit (plaintiff) | plaintiff   2                          
County of Calaveras | Pacific Gas & Electric Co | 2015 Butte fire                              
Loss Contingencies [Line Items]                              
Value of claims brought against company     $ 167.0 $ 85.0                      
Settlement reached             $ 25.4