GENERAL INFORMATION AND OTHER FINANCIAL DATA - AFFILIATES REVENUE AND COST OF SALES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Related Party Transaction [Line Items]
Revenues	$ 3,640	$ 6,560
Interest expense	305	366
Related Party
Related Party Transaction [Line Items]
Revenues	10	13
Interest expense	4	4
SDG&E
Related Party Transaction [Line Items]
Revenues	1,379	1,653
Interest expense	128	118
Operating revenues	1,379	1,653
SDG&E | Related Party
Related Party Transaction [Line Items]
Operating revenues	6	4
Cost of sales	40	30
SoCalGas
Related Party Transaction [Line Items]
Revenues	1,805	3,794
Interest expense	77	69
Operating revenues	1,805	3,794
SoCalGas | Related Party
Related Party Transaction [Line Items]
Operating revenues	44	34
Cost of sales	$ (3)	$ 31