GENERAL INFORMATION AND OTHER FINANCIAL DATA - INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 57	$ 172
Income before income taxes and equity earnings	651	705
Equity earnings, before income tax	141	134
Pretax income	$ 792	$ 839
Effective income tax rate (as a percent)	7.00%	21.00%
SDG&E
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 14	$ 40
Income before income taxes and equity earnings	$ 295	$ 263
Effective income tax rate (as a percent)	5.00%	15.00%
SoCalGas
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 38	$ 43
Income before income taxes and equity earnings	$ 481	$ 402
Effective income tax rate (as a percent)	8.00%	11.00%