INVESTMENTS IN UNCONSOLIDATED ENTITIES - SUMMARIZED FINANCIAL INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Schedule of Equity Method Investments [Line Items]
Net income (loss)	$ 657	$ 928
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Oncor Holdings
Schedule of Equity Method Investments [Line Items]
Operating revenues	1,249	1,139
Operating expenses	(897)	(829)
Operating income	352	310
Interest expense	(108)	(102)
Income tax expense	(42)	(36)
Net income (loss)	191	165
Noncontrolling interest held by Texas Transmission Investment LLC	(38)	(33)
Earnings attributable to Sempra Energy	$ 153	$ 132