GENERAL INFORMATION AND OTHER FINANCIAL DATA - INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 65	$ 57
Income before income taxes	848	651
Equity earnings, before income tax	148	141
Pretax income	$ 996	$ 792
Effective income tax rate (as a percent)	7.00%	7.00%
SDG&E
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 69	$ 14
Income before income taxes	$ 365	$ 295
Effective income tax rate (as a percent)	19.00%	5.00%
SoCalGas
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 20	$ 38
Income before income taxes	$ 444	$ 481
Effective income tax rate (as a percent)	5.00%	8.00%