v3.26.3
GENERAL INFORMATION AND OTHER FINANCIAL DATA - AFFILIATES REVENUE AND COST OF SALES (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Related Party Transaction [Line Items]        
Revenues $ 3,191 $ 3,151 $ 9,843 $ 9,953
Interest income 35 17 113 65
Interest expense 298 403 1,110 1,195
Related Party        
Related Party Transaction [Line Items]        
Revenues 9 9 25 26
Interest income 1 0 1 0
Interest expense 7 4 19 13
San Diego Gas and Electric Company        
Related Party Transaction [Line Items]        
Revenues 1,610 1,480 4,525 4,162
Interest income 1 0 5 2
Interest expense 148 141 447 415
Operating revenues 1,610 1,480 4,525 4,162
San Diego Gas and Electric Company | Related Party        
Related Party Transaction [Line Items]        
Operating revenues 5 6 17 17
Cost of sales 33 35 96 103
Southern California Gas Company        
Related Party Transaction [Line Items]        
Revenues 1,171 1,181 4,086 4,469
Interest income 1 2 4 5
Interest expense 102 93 303 272
Operating revenues 1,171 1,181 4,086 4,469
Southern California Gas Company | Related Party        
Related Party Transaction [Line Items]        
Operating revenues 47 47 139 128
Cost of sales $ (1) $ (2) $ (3) $ (3)