SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - AFFILIATES REVENUE AND COST OF SALES (Details) $ in Millions	1 Months Ended		12 Months Ended
	Jan. 31, 2022 MW	Jun. 30, 2015 MW	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Related Party Transaction [Line Items]
Revenues			$ 16,720	$ 14,439	$ 12,857
Interest income			89	75	69
Interest expense			1,309	1,054	1,198
SDG&E
Related Party Transaction [Line Items]
Revenues			5,597	5,838	5,504
Interest income			15	5	1
Interest expense			497	449	412
Operating revenues			5,597	5,838	5,504
SoCalGas
Related Party Transaction [Line Items]
Revenues			8,289	6,840	5,515
Interest income			9	6	1
Interest expense			285	198	157
Operating revenues			$ 8,289	6,840	5,515
California Utilities | Minimum | Federal Funds Rate
Related Party Transaction [Line Items]
Variable percentage rate			13.00%
California Utilities | Maximum | Federal Funds Rate
Related Party Transaction [Line Items]
Variable percentage rate			20.00%
Related Party
Related Party Transaction [Line Items]
Revenues			$ 44	41	31
Cost of sales			0	0	11
Interest income			0	16	50
Interest expense			15	15	15
Related Party | SDG&E
Related Party Transaction [Line Items]
Cost of sales			113	92	103
Operating revenues			21	16	11
Related Party | SoCalGas
Related Party Transaction [Line Items]
Cost of sales			35	(9)	1
Operating revenues			$ 124	$ 100	$ 98
ESJ JV | SDG&E
Related Party Transaction [Line Items]
Power purchase agreement term	20 years	20 years
Generating capacity (in mw) | MW	108	155