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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	Dec. 31, 2022 USD ($) MW	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2021	Feb. 28, 2021
Related Party Transaction [Line Items]
Related party revenue		$ 41	$ 31	$ 37
Related party cost of sales		0	11	45
Interest income		16	50	56
Interest expense		15	15	14
San Diego Gas and Electric Company
Related Party Transaction [Line Items]
Related party revenue		16	11	6
Related party cost of sales		$ 92	103	79
San Diego Gas and Electric Company \| ESJ
Related Party Transaction [Line Items]
Power purchase agreement term		20 years
Generating capacity (in mw) \| MW	108	155
SoCalGas
Related Party Transaction [Line Items]
Related party revenue		$ 100	98	88
Related party cost of sales		$ (9)	$ 1	$ 0
Minimum \| Federal Funds Rate \| California Utilities
Related Party Transaction [Line Items]
Variable percentage rate		13.00%
Maximum \| Federal Funds Rate \| California Utilities
Related Party Transaction [Line Items]
Variable percentage rate		20.00%
ESJ \| Sempra Infrastructure \| ESJ
Related Party Transaction [Line Items]
Ownership percentage in equity method investee					50.00%	50.00%