SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - VARIABLE INTEREST ENTITIES (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jul. 01, 2020 project_owner
Variable Interest Entity [Line Items]
Total finance leases	$ 1,340	$ 1,343
Equity method investment	14,266	13,665
Assets	87,181	78,574
SDG&E
Variable Interest Entity [Line Items]
Total finance leases	1,233	1,256
Assets	29,185	26,422
SDG&E | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total finance leases	1,166	1,194
Cameron LNG
Variable Interest Entity [Line Items]
Number of project owners | project_owner			4
Sempra Infrastructure | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Debt instrument, maximum borrowing amount	979
Sempra Infrastructure | Variable Interest Entity, Primary Beneficiary | Port Arthur LNG
Variable Interest Entity [Line Items]
Assets	3,927
Liabilities	600
Sempra Infrastructure | Variable Interest Entity, Primary Beneficiary | ECA LNG JV
Variable Interest Entity [Line Items]
Assets	1,580	1,099
Liabilities	1,029	685
Sempra Infrastructure | Cameron LNG JV
Variable Interest Entity [Line Items]
Equity method investment	1,008	886
Oncor Holdings | Sempra Texas Utilities
Variable Interest Entity [Line Items]
Equity method investment	$ 14,266	$ 13,665
ECA LNG JV | IEnova
Variable Interest Entity [Line Items]
Ownership percentage in consolidated entity	83.40%
ECA LNG JV | Subsidiary of TOTAL SE
Variable Interest Entity [Line Items]
Ownership percentage in consolidated entity	16.60%