GENERAL INFORMATION AND OTHER FINANCIAL DATA - INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 175	$ 80	$ 551	$ 414
Income before income taxes and equity earnings	523	364	1,852	1,029
Equity earnings, before income tax:	153	159	285	302
Pretax income	$ 676	$ 523	$ 2,137	$ 1,331
Effective income tax rate (as a percent)	26.00%	15.00%	26.00%	31.00%
San Diego Gas and Electric Company
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ 4	$ 42	$ 11	$ 106
Income before income taxes and equity earnings	$ 188	$ 218	$ 453	$ 516
Effective income tax rate (as a percent)	2.00%	19.00%	2.00%	21.00%
Southern California Gas Company
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items]
Income tax expense (benefit)	$ (21)	$ 19	$ 73	$ 103
Income before income taxes and equity earnings	$ 135	$ 107	$ 589	$ 525
Effective income tax rate (as a percent)	(16.00%)	18.00%	12.00%	20.00%