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OTHER CONTINGENCIES AND COMMITMENTS (Transmission Owner Rate) (Details) - USD ($)
$ in Millions
Mar. 17, 2022
Dec. 20, 2018
Mar. 31, 2024
Transmission Owner Rate Case Revenue      
Loss Contingencies [Line Items]      
Regulatory liabilities     $ 484
Regulatory assets     $ 233
Pacific Gas & Electric Co (Utility) | Electric      
Loss Contingencies [Line Items]      
Requested return on equity rate 9.26%    
Requested return on equity rate, incentive component 0.50%    
Actual return on equity rate 9.76%    
Requested revenue rate   98.85%