SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - VARIABLE INTEREST ENTITIES (Details) $ in Millions	Dec. 31, 2025 USD ($)	Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Jul. 31, 2020 project_owner
Variable Interest Entity [Line Items]
Property, plant and equipment, net	$ 49,011		$ 61,437
Total finance leases	1,293		1,315
Equity method investment	17,472		15,400
Assets	110,878		96,155
Disposal Group Held-for-sale | SI Partners
Variable Interest Entity [Line Items]
Equity method investments held for sale	2,566
SDG&E
Variable Interest Entity [Line Items]
Property, plant and equipment, net	26,304		25,111
Total finance leases	1,176		1,205
Assets	32,682		30,773
SDG&E | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Property, plant and equipment, net	1,109		1,138
Total finance leases	1,109		1,138
Cameron LNG
Variable Interest Entity [Line Items]
Number of project owners | project_owner				4
IEnova | Loan Agreement To Finance Natural Gas Liquefaction Export Facility
Variable Interest Entity [Line Items]
Debt instrument, maximum borrowing amount	1,226
TotalEnergies SE | Loan Agreement To Finance Natural Gas Liquefaction Export Facility
Variable Interest Entity [Line Items]
Debt instrument, maximum borrowing amount	305
SI Partners and ConocoPhillips | Port Arthur LNG I
Variable Interest Entity [Line Items]
Noncontrolling interest, funding commitment	9,000
SI Partners
Variable Interest Entity [Line Items]
Debt instrument, maximum borrowing amount	60
Current guarantor obligations	300
SI Partners | PA2 JVCo
Variable Interest Entity [Line Items]
Funding commitment, construction project	7,800	$ 7,800
Blackstone | PA2 JVCo
Variable Interest Entity [Line Items]
Funding commitment, construction project	7,000
Sempra Infrastructure | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Debt instrument, maximum borrowing amount	979
Current guarantor obligations	41
Sempra Infrastructure | Variable Interest Entity, Primary Beneficiary | ECA LNG Phase 1, Port Arthur LNG and Port Arthur LNG II
Variable Interest Entity [Line Items]
Assets	15,950		8,177
Liabilities	6,335		2,664
Sempra Infrastructure | Cameron LNG JV
Variable Interest Entity [Line Items]
Equity method investment	1,259		1,149
Sempra Infrastructure | Cameron LNG JV | Disposal Group Held-for-sale | SI Partners
Variable Interest Entity [Line Items]
Equity method investments held for sale	1,242
Oncor Holdings | Sempra Texas Utilities
Variable Interest Entity [Line Items]
Equity method investment	$ 17,472		$ 15,400
Port Arthur LNG I | SI Partners and ConocoPhillips
Variable Interest Entity [Line Items]
Noncontrolling interest, funding commitment, percentage	110.00%
Port Arthur LNG I | SI Partners
Variable Interest Entity [Line Items]
Noncontrolling interest, guaranteed funding commitment, percentage	70.00%