GENERAL INFORMATION AND OTHER FINANCIAL DATA - INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 172	$ 376
Income before income taxes and equity earnings	705	1,329
Equity earnings, before income tax:	134	132
Pretax income	$ 839	$ 1,461
Effective income tax rate (as a percent)	21.00%	26.00%
SDG&E
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 40	$ 7
Income before income taxes and equity earnings	$ 263	$ 265
Effective income tax rate (as a percent)	15.00%	3.00%
SoCalGas
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 43	$ 94
Income before income taxes and equity earnings	$ 402	$ 454
Effective income tax rate (as a percent)	11.00%	21.00%