INVESTMENTS IN UNCONSOLIDATED ENTITIES - NARRATIVE (Details) - USD ($) $ in Millions	1 Months Ended		3 Months Ended		6 Months Ended
	Jul. 31, 2020	Mar. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Schedule of Equity Method Investments [Line Items]
Equity earnings			$ 233	$ 118	$ 496	$ 219
Cameron LNG [Member]
Schedule of Equity Method Investments [Line Items]
Guarantees, carrying value			2		2
Maximum exposure under guarantor obligations			4,000		4,000
R B S Sempra Commodities [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings		$ (100)
Sempra Texas Utilities [Member] | Oncor Holdings [Member]
Schedule of Equity Method Investments [Line Items]
Contribution			139	1,180	139	1,180
Commitment to invest				$ 1,067		1,067
Proceeds from dividends received						108
Sempra LNG [Member]
Schedule of Equity Method Investments [Line Items]
Maximum exposure under guarantor obligations			$ 4,000		4,000
Corporate Joint Venture [Member] | Sempra LNG [Member] | Cameron LNG [Member]
Schedule of Equity Method Investments [Line Items]
Investments made during period					1	77
Proceeds from dividends received					74
Capitalized interest						$ 26
Oncor Holdings [Member] | Sempra Texas Utilities [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from dividends received					$ 146
Oncor Holdings [Member] | Sempra Texas Holdings Corp [Member] | Sempra Texas Intermediate Holding Company LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage in consolidated entity					100.00%
Oncor Electric Delivery Company LLC. [Member] | Oncor Holdings [Member] | Sempra Texas Utilities [Member]
Schedule of Equity Method Investments [Line Items]
Acquired percentage interest			80.25%		80.25%
Cameron LNG [Member] | Sempra LNG [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage in consolidated entity					50.20%
Other Current Liabilities [Member] | R B S Sempra Commodities [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings		25
Deferred Credits and Other [Member] | R B S Sempra Commodities [Member]
Schedule of Equity Method Investments [Line Items]
Equity earnings		$ 75
Subsequent Event [Member] | Corporate Joint Venture [Member] | Sempra LNG [Member] | Cameron LNG [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from related party debt	$ 1,500
Corporate Joint Venture [Member] | Cameron LNG [Member] | Sempra LNG [Member]
Schedule of Equity Method Investments [Line Items]
Guarantees, carrying value			$ 753		$ 753