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RELATED PARTY AGREEMENTS AND TRANSACTIONS (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 11, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Related Party Transaction [Line Items]        
Intercompany note to PG&E Corporation $ 145      
Intercompany Loan        
Related Party Transaction [Line Items]        
Debt Instrument, term 364 days      
Pacific Gas & Electric Co (Utility)        
Related Party Transaction [Line Items]        
Current receivables   $ 173 $ 35  
Current payables   19 46  
Intercompany note to PG&E Corporation   $ 145 $ 0 $ 0