INVESTMENTS IN UNCONSOLIDATED ENTITIES - NARRATIVE (Details) $ in Millions	1 Months Ended		9 Months Ended
	Jun. 30, 2021 USD ($)	Jul. 31, 2020 USD ($) projectOwner bank	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Schedule of Equity Method Investments [Line Items]
Proceeds from distributions received			$ 668	$ 643
Oncor Holdings | Oncor Electric Delivery Company LLC.
Schedule of Equity Method Investments [Line Items]
Ownership interest (as a percent)			80.25%
Sempra Texas Intermediate Holding Company LLC | Oncor Holdings
Schedule of Equity Method Investments [Line Items]
Ownership interest (as a percent)			100.00%
Sempra Texas Utilities | Oncor Holdings
Schedule of Equity Method Investments [Line Items]
Investments made during period			$ 270	256
Proceeds from distributions received			$ 323	255
Sempra Infrastructure | Cameron LNG JV
Schedule of Equity Method Investments [Line Items]
Ownership percentage in consolidated entity (in percentage)			50.20%
Sempra Infrastructure | TAG
Schedule of Equity Method Investments [Line Items]
Proceeds from distributions received			$ 36	32
Sempra Infrastructure | IMG
Schedule of Equity Method Investments [Line Items]
Proceeds from distributions received			6
Sempra Infrastructure | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Guarantees, carrying value			18
Sempra Infrastructure | Other current assets | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Guarantees, carrying value			7
Sempra Infrastructure | Other long-term assets | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Guarantees, carrying value			11
Sempra Infrastructure | Cameron LNG JV
Schedule of Equity Method Investments [Line Items]
Investments made during period			11	19
Proceeds from distributions received			339	$ 388
Sempra Infrastructure | Cameron LNG JV | Corporate Joint Venture
Schedule of Equity Method Investments [Line Items]
Liability cap, amount			$ 979
Number of project owners | projectOwner		4
Proceeds from related party debt		$ 1,500
Number of project owners sending direct proceeds | projectOwner		2
Number of project owners sending proceeds from external lenders | projectOwner		2
Liability cap (as a percent)			130.00%
Sempra Infrastructure | Cameron LNG JV | Corporate Joint Venture | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Proceeds from related party debt		$ 753
Return on investments		$ 753
Number of banks | bank		8
Sempra Infrastructure | Cameron LNG JV | Promissory Note for SDSRA Distribution | Corporate Joint Venture
Schedule of Equity Method Investments [Line Items]
Proceeds from distributions received	$ 165
Liability cap, amount	165
Sempra Infrastructure | Cameron LNG JV | Promissory Note for SDSRA Distribution | Corporate Joint Venture | Deferred Credits and Other
Schedule of Equity Method Investments [Line Items]
Senior note, liability	$ 22
Sempra Infrastructure | Cameron LNG JV | Promissory Note for SDSRA Distribution | Corporate Joint Venture | Other current liabilities
Schedule of Equity Method Investments [Line Items]
Guarantees, carrying value			$ 19