GENERAL INFORMATION AND OTHER FINANCIAL DATA - VARIABLE INTEREST ENTITIES (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)		Jul. 31, 2020 projectOwner
Variable Interest Entities [Line Items]
Property plant and equipment, net	$ 63,041	$ 61,437	[1]
Finance lease obligations	1,315	1,315
Equity method investment	15,871	15,400	[1]
Assets	99,010	96,155	[1]
Oncor Holdings | Sempra Texas Utilities
Variable Interest Entities [Line Items]
Equity method investment	15,871	15,400
Cameron LNG Holdings | Sempra Infrastructure
Variable Interest Entities [Line Items]
Equity method investment	1,127	1,149
Cameron LNG JV | Sempra Infrastructure | Corporate Joint Venture
Variable Interest Entities [Line Items]
Liability cap, amount	979
SDG&E
Variable Interest Entities [Line Items]
Property plant and equipment, net	25,327	25,111	[2]
Finance lease obligations	1,197	1,205
Assets	$ 31,856	30,773	[2]
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 | projectOwner				4
Variable Interest Entity, Not Primary Beneficiary | SDG&E
Variable Interest Entities [Line Items]
Property plant and equipment, net	$ 1,131	1,138
Finance lease obligations	1,131	1,138
Variable Interest Entity, Primary Beneficiary | ECA LNG JV | Sempra Infrastructure
Variable Interest Entities [Line Items]
Assets	1,853	1,758
Liabilities	1,168	1,080
Variable Interest Entity, Primary Beneficiary | Port Arthur LNG | Sempra Infrastructure
Variable Interest Entities [Line Items]
Assets	7,179	6,419
Liabilities	$ 2,437	$ 1,584

[1] Derived from audited financial statements.

[2] Derived from audited financial statements.