GENERAL INFORMATION AND OTHER FINANCIAL DATA - AFFILIATES REVENUE AND COST OF SALES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Related Party Transaction [Line Items]
Revenues	$ 3,335	$ 3,547	$ 9,895	$ 7,367
Interest income	17	15	41	40
Interest expense	317	271	683	514
Related Party
Related Party Transaction [Line Items]
Revenues	11	15	24	22
Interest income	0	4	0	14
Interest expense	4	4	8	8
San Diego Gas and Electric Company
Related Party Transaction [Line Items]
Interest income	4	1	5	1
Interest expense	123	114	241	220
Operating revenues	1,262	1,399	2,915	2,844
San Diego Gas and Electric Company | Related Party
Related Party Transaction [Line Items]
Operating revenues	6	4	10	8
Cost of sales	27	26	57	50
Southern California Gas Company
Related Party Transaction [Line Items]
Interest income	1	1	5	1
Interest expense	71	45	140	85
Operating revenues	1,467	1,501	5,261	3,494
Southern California Gas Company | Related Party
Related Party Transaction [Line Items]
Operating revenues	28	23	62	49
Cost of sales	$ 4	$ (4)	$ 35	$ (4)