v3.26.3
DEBT AND CREDIT FACILITIES - LONG-TERM DEBT (Details) - USD ($)
$ in Millions
1 Months Ended 9 Months Ended
Aug. 31, 2026
May 31, 2026
Mar. 31, 2026
Sep. 30, 2026
Sep. 30, 2025
Debt Instrument [Line Items]          
Issuances of debt (maturities greater than 90 days)       $ 11,178 $ 8,892
San Diego Gas and Electric Company          
Debt Instrument [Line Items]          
Issuances of debt (maturities greater than 90 days)       1,096 848
Southern California Gas Company          
Debt Instrument [Line Items]          
Issuances of debt (maturities greater than 90 days)       $ 1,144 $ 1,090
Mortgages | First Mortgage Bonds Due March 2036 | San Diego Gas and Electric Company          
Debt Instrument [Line Items]          
Debt amount     $ 625    
Debt instrument, interest rate     5.20%    
Issuances of debt (maturities greater than 90 days)     $ 618    
Unamortized debt issuance costs     7    
Mortgages | First Mortgage Bonds Due March 2056 | San Diego Gas and Electric Company          
Debt Instrument [Line Items]          
Debt amount     $ 475    
Debt instrument, interest rate     5.95%    
Issuances of debt (maturities greater than 90 days)     $ 467    
Unamortized debt issuance costs     $ 8    
Mortgages | First Mortgage Bonds Due June 2056 | Southern California Gas Company          
Debt Instrument [Line Items]          
Debt amount   $ 650      
Debt instrument, interest rate   5.90%      
Issuances of debt (maturities greater than 90 days)   $ 640      
Unamortized debt issuance costs   $ 10      
Mortgages | First Mortgage Bonds Due September 2036 | Southern California Gas Company          
Debt Instrument [Line Items]          
Debt amount $ 500        
Debt instrument, interest rate 5.50%        
Issuances of debt (maturities greater than 90 days) $ 493        
Unamortized debt issuance costs $ 7