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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
numberOfSegment
facility
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Public Utility, Property, Plant and Equipment [Line Items]      
Number of reportable segments | numberOfSegment 1    
Restricted cash and cash equivalents $ 273 $ 297 $ 213
Self insurance contributions 911    
Liability insurance coverage, cash and cash equivalents 8    
Wildfire self-insurance asset $ 905 0  
Period for probable revenue recovery 24 months    
Pacific Gas & Electric Co (Utility)      
Public Utility, Property, Plant and Equipment [Line Items]      
Restricted cash and cash equivalents $ 272 294 $ 213
Wildfire self-insurance asset $ 905 $ 0  
Composite depreciation rate 3.61% 3.56% 3.74%
AFUDC debt recorded $ 111 $ 82 $ 81
AFUDC equity recorded $ 184 $ 179 $ 184
Pacific Gas & Electric Co (Utility) | Diablo Canyon      
Public Utility, Property, Plant and Equipment [Line Items]      
Number of generation facilities | facility 2