v3.26.3
GENERAL INFORMATION AND OTHER FINANCIAL DATA - INCOME TAXES NARRATIVE (Details) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2026
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Schedule Of Income Tax Expense And Effective Income Tax Rates [Line Items]          
Income tax benefits from legislative impacts     $ 73   $ 73
San Diego Gas and Electric Company          
Schedule Of Income Tax Expense And Effective Income Tax Rates [Line Items]          
Income tax benefits from legislative impacts     26   26
Southern California Gas Company          
Schedule Of Income Tax Expense And Effective Income Tax Rates [Line Items]          
Income tax benefits from legislative impacts     47   47
Disposal Group Held-for-sale          
Schedule Of Income Tax Expense And Effective Income Tax Rates [Line Items]          
Income tax expense (benefit) from divestiture   $ (9) 514 $ (63) 514
SI Partners | Disposal Group Held-for-sale | Income Tax Jurisdiction, Foreign          
Schedule Of Income Tax Expense And Effective Income Tax Rates [Line Items]          
Income tax expense (benefit)   (9) $ 514 (63) 514
Ecogas | Disposal group, sold          
Schedule Of Income Tax Expense And Effective Income Tax Rates [Line Items]          
Income tax expense (benefit) from divestiture   17   15 38
Income tax expense (benefit) from divestiture, after noncontrolling interest   $ 11   $ 10 $ 26
Income tax expense, gain on sale of business $ 59