INVESTMENTS IN UNCONSOLIDATED ENTITIES - SUMMARIZED FINANCIAL INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2021	Mar. 18, 2021
Schedule of Equity Method Investments [Line Items]
Net income	$ 1,463	$ 4,105	$ 2,362
Current assets	4,375	4,511	3,339
Current liabilities	10,035	6,839	9,150
Other
Schedule of Equity Method Investments [Line Items]
Operating revenue	2,721	2,341	798
Operating expense	(719)	(706)	(372)
Operating Income	2,002	1,635	426
Interest expense	(548)	(514)	(401)
Net income	1,388	1,132	85
Current assets	788	1,035	1,124
Noncurrent assets	14,686	15,304	15,039
Current liabilities	1,230	1,342	1,232
Noncurrent liabilities	11,807	12,863	11,438
Oncor Holdings | Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Equity Method Investments [Line Items]
Operating revenue	4,764	4,511	4,347
Operating expense	(3,397)	(3,224)	(3,135)
Operating Income	1,367	1,287	1,212
Interest expense	(413)	(405)	(375)
Income tax expense	(163)	(146)	(131)
Net income	760	703	643
Noncontrolling interest held by TTI	(152)	(141)	(129)
Equity Method Investment, Summarized Financial Information, Net Income (Loss), Attributable To Controlling Interest	608	562	514
Current assets	1,039	1,045	913
Noncurrent assets	29,481	28,022	26,012
Current liabilities	2,220	1,120	1,626
Noncurrent liabilities	15,281	15,611	14,125
Noncontrolling interest held by TTI	$ 2,916	$ 2,737	$ 2,473
Sempra Infrastructure | ESJ
Schedule of Equity Method Investments [Line Items]
Ownership percentage held by noncontrolling owners		50.00%		50.00%	50.00%