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REVENUES - CONTRACT LIABILITIES (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Contract with Customer, Liability [Roll Forward]    
Contract liabilities, opening balance $ (196) $ (198)
Revenue from performance obligations satisfied during reporting period 83 5
Payments received in advance (1) (3)
Reclassification to liabilities held for sale 45 0
Contract liabilities, closing balance (69) (196)
Other current liabilities    
Contract with Customer, Liability [Roll Forward]    
Contract liabilities, closing balance (4)  
Deferred Credits and Other    
Contract with Customer, Liability [Roll Forward]    
Contract liabilities, closing balance (65)  
SDG&E    
Contract with Customer, Liability [Roll Forward]    
Contract liabilities, opening balance (72) (75)
Revenue from performance obligations satisfied during reporting period 3 3
Contract liabilities, closing balance (69) $ (72)
SDG&E | Other current liabilities    
Contract with Customer, Liability [Roll Forward]    
Contract liabilities, closing balance (4)  
SDG&E | Deferred Credits and Other    
Contract with Customer, Liability [Roll Forward]    
Contract liabilities, closing balance $ (65)