v3.26.1
GENERAL INFORMATION AND OTHER FINANCIAL DATA - AFFILIATES REVENUE AND COST OF SALES (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Related Party Transaction [Line Items]        
Revenues $ 2,997 $ 3,000 $ 6,652 $ 6,802
Interest expense 430 359 812 792
Related Party        
Related Party Transaction [Line Items]        
Revenues 8 8 16 17
Interest expense 6 5 12 9
SDG&E        
Related Party Transaction [Line Items]        
Revenues 1,368 1,262 2,915 2,682
Interest expense 152 139 299 274
Operating revenues 1,368 1,262 2,915 2,682
SDG&E | Related Party        
Related Party Transaction [Line Items]        
Operating revenues 6 5 12 11
Cost of sales 35 30 63 68
SoCalGas        
Related Party Transaction [Line Items]        
Revenues 1,187 1,268 2,915 3,288
Interest expense 104 89 201 179
Operating revenues 1,187 1,268 2,915 3,288
SoCalGas | Related Party        
Related Party Transaction [Line Items]        
Operating revenues 46 40 92 81
Cost of sales $ (2) $ 0 $ (2) $ (1)