GENERAL INFORMATION AND OTHER FINANCIAL DATA - VARIABLE INTEREST ENTITIES (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)		Jul. 01, 2020 project_owner
Variable Interest Entities [Line Items]
Property plant and equipment, net	$ 59,275	$ 54,960	[1]
Finance lease obligations	1,318	1,340
Equity method investment	15,160	14,266	[1]
Assets	93,748	87,181	[1]
Oncor Holdings | Sempra Texas Utilities
Variable Interest Entities [Line Items]
Equity method investment	15,160	14,266
Cameron LNG Holdings | Sempra Infrastructure
Variable Interest Entities [Line Items]
Equity method investment	1,068	1,008
SDG&E
Variable Interest Entities [Line Items]
Property plant and equipment, net	24,628	23,549	[1]
Finance lease obligations	1,209	1,233
Assets	$ 30,765	29,185	[1]
IEnova | ECA LNG JV
Variable Interest Entities [Line Items]
Ownership percentage in consolidated entity (in percentage)	83.40%
Subsidiary of TOTAL SE | ECA LNG JV
Variable Interest Entities [Line Items]
Ownership percentage in consolidated entity (in percentage)	16.60%
Cameron LNG JV
Variable Interest Entities [Line Items]
Number of project owners | project_owner				4
Variable Interest Entity, Not Primary Beneficiary | SDG&E
Variable Interest Entities [Line Items]
Property plant and equipment, net	$ 1,144	1,166
Finance lease obligations	1,144	1,166
Variable Interest Entity, Primary Beneficiary | ECA LNG JV | Sempra Infrastructure
Variable Interest Entities [Line Items]
Assets	1,715	1,580
Liabilities	1,060	1,029
Variable Interest Entity, Primary Beneficiary | Port Arthur LNG | Sempra Infrastructure
Variable Interest Entities [Line Items]
Assets	5,446	3,927
Liabilities	$ 865	$ 600

[1] Derived from audited financial statements.