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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Estimated Useful Lives and Balances of Utilities Property, Plant and Equipment) (Details) - Pacific Gas & Electric Co (Utility) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Public Utility, Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 123,534 $ 115,414
Accumulated depreciation (35,304) (33,093)
Net property, plant, and equipment 88,230 82,321
Electricity generating facilities    
Public Utility, Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment 11,420 11,423
Electricity generating facilities | Northern California Wildfire    
Public Utility, Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 3,000  
Electricity generating facilities | Minimum    
Public Utility, Property, Plant and Equipment [Line Items]    
Estimated Useful Lives (years) 1 year  
Electricity generating facilities | Maximum    
Public Utility, Property, Plant and Equipment [Line Items]    
Estimated Useful Lives (years) 75 years  
Electricity distribution facilities    
Public Utility, Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 49,821 45,205
Electricity distribution facilities | Minimum    
Public Utility, Property, Plant and Equipment [Line Items]    
Estimated Useful Lives (years) 10 years  
Electricity distribution facilities | Maximum    
Public Utility, Property, Plant and Equipment [Line Items]    
Estimated Useful Lives (years) 70 years  
Electricity transmission facilities    
Public Utility, Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 18,481 17,562
Electricity transmission facilities | Minimum    
Public Utility, Property, Plant and Equipment [Line Items]    
Estimated Useful Lives (years) 15 years  
Electricity transmission facilities | Maximum    
Public Utility, Property, Plant and Equipment [Line Items]    
Estimated Useful Lives (years) 75 years  
Natural gas distribution facilities    
Public Utility, Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 17,213 16,324
Natural gas distribution facilities | Minimum    
Public Utility, Property, Plant and Equipment [Line Items]    
Estimated Useful Lives (years) 15 years  
Natural gas distribution facilities | Maximum    
Public Utility, Property, Plant and Equipment [Line Items]    
Estimated Useful Lives (years) 60 years  
Natural gas transmission and storage facilities    
Public Utility, Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 11,117 10,496
Natural gas transmission and storage facilities | Minimum    
Public Utility, Property, Plant and Equipment [Line Items]    
Estimated Useful Lives (years) 15 years  
Natural gas transmission and storage facilities | Maximum    
Public Utility, Property, Plant and Equipment [Line Items]    
Estimated Useful Lives (years) 68 years  
General plant and other    
Public Utility, Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 10,210 9,165
General plant and other | Minimum    
Public Utility, Property, Plant and Equipment [Line Items]    
Estimated Useful Lives (years) 5 years  
General plant and other | Maximum    
Public Utility, Property, Plant and Equipment [Line Items]    
Estimated Useful Lives (years) 50 years  
Financing lease    
Public Utility, Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 814 787
Construction work in progress    
Public Utility, Property, Plant and Equipment [Line Items]    
Total property, plant, and equipment $ 4,458 $ 4,452