GENERAL INFORMATION AND OTHER FINANCIAL DATA - AFFILIATES REVENUE AND COST OF SALES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Related Party Transaction [Line Items]
Revenues	$ 3,011	$ 3,335	$ 6,651	$ 9,895
Interest expense	311	317	616	683
Related Party
Related Party Transaction [Line Items]
Revenues	10	11	20	24
Interest expense	3	4	7	8
SDG&E
Related Party Transaction [Line Items]
Revenues	1,355	1,262	2,734	2,915
Interest expense	131	123	259	241
Operating revenues	1,355	1,262	2,734	2,915
SDG&E | Related Party
Related Party Transaction [Line Items]
Operating revenues	5	6	11	10
Cost of sales	35	27	75	57
SoCalGas
Related Party Transaction [Line Items]
Revenues	1,309	1,467	3,114	5,261
Interest expense	78	71	155	140
Operating revenues	1,309	1,467	3,114	5,261
SoCalGas | Related Party
Related Party Transaction [Line Items]
Operating revenues	37	28	81	62
Cost of sales	$ 0	$ 4	$ (3)	$ 35