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WILDFIRE-RELATED CONTINGENCIES (Wildfire Fund) (Details) - USD ($)
$ in Millions
Aug. 23, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jul. 12, 2019
Loss Contingencies [Line Items]          
Disallowance cap, transmission and distribution equity rate base         $ 2,900
Initial safety certification, documentation provided, period 90 days        
Initial safety certification, period 12 months        
Expected capitalization, proceeds of bond   $ 10,500      
Expected capitalization, initial contribution   7,500      
Expected capitalization, annual contribution   300      
Insurance receivable   1,247 $ 674 $ 2,238  
2021 Dixie fire          
Loss Contingencies [Line Items]          
Insurance receivable   $ 563 $ 0 $ 0