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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, 2021 USD ($) MW	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Related Party Transaction [Line Items]
Related party revenue		$ 31	$ 37	$ 52
Related party cost of sales		11	45	50
Interest Income, Related Party		50	56	74
Interest Expense, Related Party		15	14	2
San Diego Gas and Electric Company [Member]
Related Party Transaction [Line Items]
Related party revenue		11	6	6
Related party cost of sales		$ 103	79	74
San Diego Gas and Electric Company [Member] \| ESJ
Related Party Transaction [Line Items]
Power purchase agreement term		20 years
Generating capacity (in mw) \| MW		155
San Diego Gas and Electric Company [Member] \| ESJ \| Subsequent Event
Related Party Transaction [Line Items]
Generating capacity (in mw) \| MW	108
SoCalGas
Related Party Transaction [Line Items]
Related party revenue		$ 98	88	69
Related party cost of sales		$ 1	$ 0	$ 8
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%