GENERAL INFORMATION AND OTHER FINANCIAL DATA - AFFILIATES REVENUE AND COST OF SALES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Related Party Transaction [Line Items]
Revenues	$ 2,776	$ 3,334	$ 9,427	$ 13,229
Interest expense	328	312	944	995
Related Party
Related Party Transaction [Line Items]
Revenues	11	10	31	34
Interest expense	5	3	12	11
SDG&E
Related Party Transaction [Line Items]
Revenues	1,243	1,442	3,977	4,357
Interest expense	131	126	390	367
Operating revenues	1,243	1,442	3,977	4,357
SDG&E | Related Party
Related Party Transaction [Line Items]
Operating revenues	6	5	17	15
Cost of sales	36	25	111	82
SoCalGas
Related Party Transaction [Line Items]
Revenues	1,054	1,313	4,168	6,574
Interest expense	82	70	237	210
Operating revenues	1,054	1,313	4,168	6,574
SoCalGas | Related Party
Related Party Transaction [Line Items]
Operating revenues	43	29	124	91
Cost of sales	$ (2)	$ 2	$ (5)	$ 37