INVESTMENTS IN UNCONSOLIDATED ENTITIES - NARRATIVE (Details) $ in Millions	1 Months Ended		3 Months Ended
	Jun. 30, 2021 USD ($)	Jul. 31, 2020 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Jun. 29, 2021 bank	Mar. 19, 2021	Mar. 18, 2021
Schedule of Equity Method Investments [Line Items]
Distributions from investments			$ 0	$ 4
Charge to equity earnings			(326)	(318)
Distributions from investments			204	208
Sempra Texas Utilities | Oncor Holdings
Schedule of Equity Method Investments [Line Items]
Contribution			85	50
Sempra Infrastructure | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Guarantees, carrying value			12
Sempra Infrastructure | Cameron LNG JV
Schedule of Equity Method Investments [Line Items]
Distributions from investments			$ 119	131
Corporate Joint Venture | Sempra Infrastructure | Cameron LNG JV
Schedule of Equity Method Investments [Line Items]
Proceeds from related party debt		$ 1,500
Liability cap (as a percent)			130.00%
Liability cap, amount			$ 979
Corporate Joint Venture | Sempra Infrastructure | Cameron LNG JV | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Distributions from investments		753
Proceeds from related party debt		$ 753
Number of banks | bank					8
Oncor Holdings | Sempra Texas Utilities
Schedule of Equity Method Investments [Line Items]
Distributions from investments			$ 85	77
ESJ | IEnova | Sempra Infrastructure
Schedule of Equity Method Investments [Line Items]
Acquired percentage interest						50.00%
Oncor Holdings | Sempra Texas Holdings Corp | Sempra Texas Intermediate Holding Company LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage in consolidated entity			100.00%
Oncor Electric Delivery Company LLC. | Oncor Holdings | Sempra Texas Utilities
Schedule of Equity Method Investments [Line Items]
Acquired percentage interest			80.25%
Cameron LNG JV | Sempra Infrastructure
Schedule of Equity Method Investments [Line Items]
Ownership percentage in consolidated entity			50.20%
ESJ | Sempra Infrastructure
Schedule of Equity Method Investments [Line Items]
Distributions from investments				$ 4
ESJ | ESJ | IEnova | Sempra Infrastructure
Schedule of Equity Method Investments [Line Items]
Ownership percentage							50.00%
Other current assets | Sempra Infrastructure | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Guarantees, carrying value			$ 7
Other long-term assets | Sempra Infrastructure | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Guarantees, carrying value			5
Promissory Note for SDSRA Distribution | Corporate Joint Venture | Sempra Infrastructure | Cameron LNG JV
Schedule of Equity Method Investments [Line Items]
Distributions from investments	$ 165
Promissory Note for SDSRA Distribution | Other Current Liabilities | Corporate Joint Venture | Sempra Infrastructure | Cameron LNG JV
Schedule of Equity Method Investments [Line Items]
Guarantees, carrying value			$ 21
Promissory Note for SDSRA Distribution | Deferred Credits and Other | Corporate Joint Venture | Sempra Infrastructure | Cameron LNG JV
Schedule of Equity Method Investments [Line Items]
Senior note, liability	$ 22