INVESTMENTS IN UNCONSOLIDATED ENTITIES - NARRATIVE (Details)		1 Months Ended			12 Months Ended
	May 16, 2019 USD ($)	Jun. 30, 2021 USD ($)	Jul. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 USD ($) MT Bcf	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 19, 2021	Mar. 18, 2021	May 31, 2019	Jun. 30, 2015 USD ($)	Nov. 30, 2014 USD ($)
Schedule of Equity Method Investments [Line Items]
Undistributed earnings from equity method investments				$ 634,000,000	$ 1,500,000,000	$ 1,100,000,000	$ 634,000,000
Undistributed earnings, equity method investments, over 50 percent owned					1,100,000,000
Interest costs capitalized					217,000,000	202,000,000	183,000,000
Equitization of long-term debt for deficit held by NCI					0	22,000,000	0
Return on investments					366,000,000	761,000,000	9,000,000
Equity earnings					1,343,000,000	1,015,000,000	580,000,000
Oncor Holdings
Schedule of Equity Method Investments [Line Items]
Cash contributed to fund the acquisition				$ 1,067,000,000			$ 1,067,000,000
R B S Sempra Commodities
Schedule of Equity Method Investments [Line Items]
Equity earnings					$ 50,000,000	$ (100,000,000)
Cameron LNG
Schedule of Equity Method Investments [Line Items]
Ownership percentage in equity method investee					50.20%
Indirect economic and beneficial and ownership interest after financial completion					10.00%
Sempra Texas Utilities | Oncor Holdings
Schedule of Equity Method Investments [Line Items]
Ownership percentage in equity method investee				100.00%	100.00%	100.00%	100.00%
Sempra Infrastructure | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Current guarantor obligations					$ 7,000,000
Sempra Infrastructure | IMG JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage in equity method investee					40.00%
Transportation service contract term					35 years
Sempra Infrastructure | Cameron LNG
Schedule of Equity Method Investments [Line Items]
Payments to acquire equity method investments					$ 2,000,000	$ 54,000,000	$ 77,000,000
Project capacity | MT					13.9
Proved undeveloped reserve | MT					12
Proved undeveloped reserve per day | Bcf					1.7
Interest costs capitalized						33,000,000
Debt amount					$ 7,400,000,000
Equitization of long-term debt for deficit held by NCI				$ 3,000,000,000
Fixed percentage interest rate					3.39%
Notional amount of derivatives											$ 1,500,000,000	$ 3,700,000,000
Derivative amount terminated				$ 790,000,000
Effective fixed rate (as a percent)				3.26%
Weighted-average all-in cost of loans outstanding (as a percent)					3.69%
Sempra Infrastructure | Cameron LNG | Corporate Joint Venture
Schedule of Equity Method Investments [Line Items]
Proceeds from related parties			$ 1,500,000,000
Debt covenant, liability cap (as a percent)					130.00%
Debt covenant, liability cap amount					$ 979,000,000
Sempra Infrastructure | Cameron LNG | Corporate Joint Venture | Promissory Note for SDSRA Distribution
Schedule of Equity Method Investments [Line Items]
Cash dividends received		$ 165,000,000
Sempra Infrastructure | Cameron LNG | Corporate Joint Venture | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Proceeds from related parties			$ 753,000,000
Return on investments					753,000,000
Sempra Infrastructure | Cameron LNG | Corporate Joint Venture | Deferred Credits and Other | Promissory Note for SDSRA Distribution
Schedule of Equity Method Investments [Line Items]
Guaranty liability		$ 22,000,000			$ 22,000,000
Sempra Infrastructure | LIBOR | Cameron LNG
Schedule of Equity Method Investments [Line Items]
Fixed percentage interest rate											3.32%	3.19%
Weighted average rate prior to project completion					0.98%
Weighted average rate after project completion					1.22%
Sharyland Holdings, LP
Schedule of Equity Method Investments [Line Items]
Acquired percentage interest	50.00%
Payments to acquire equity method investments	$ 95,000,000
Post-closing adjustments	$ 7,000,000
Cash invested in equity method investment							3,000,000
Sharyland Holdings, LP | Sempra Texas Utilities
Schedule of Equity Method Investments [Line Items]
Acquired percentage interest										50.00%
ESJ | Sempra Infrastructure | IEnova
Schedule of Equity Method Investments [Line Items]
Acquired percentage interest								50.00%
Oncor Holdings
Schedule of Equity Method Investments [Line Items]
Payments to acquire equity method investments					$ 566,000,000	$ 632,000,000	$ 1,587,000,000
Oncor Holdings | Sempra Texas Holdings Corp | Sempra Texas Utilities
Schedule of Equity Method Investments [Line Items]
Ownership percentage in consolidated entity					100.00%
Oncor Electric Delivery Company LLC | Oncor Holdings
Schedule of Equity Method Investments [Line Items]
Ownership percentage held by noncontrolling owners					80.25%
Cameron LNG | Sempra Infrastructure
Schedule of Equity Method Investments [Line Items]
Ownership percentage in consolidated entity					50.20%
ESJ | ESJ | Sempra Infrastructure | IEnova
Schedule of Equity Method Investments [Line Items]
Ownership percentage held by noncontrolling owners									50.00%