COMMITMENTS, CONTINGENCIES AND GUARANTEES - ENVIRONMENTAL ISSUES (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) site	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Environmental Issues [Line Items]
Potential monetary sanctions threshold, percentage	1.00%
Potential monetary sanctions threshold, actual amount	$ 348
Capital expenditures for environmental issues	63	$ 65	$ 107
Accrued liability for environmental matters, discount	$ 18
Accrued liability for environmental matters, discount rate (as a percent)	2.24%
Accrual for environmental loss contingencies	$ 59
Accrual for environmental loss contingencies, current	3
Accrual for environmental loss contingencies, noncurrent	$ 56
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Liabilities, Other than Long-Term Debt, Noncurrent
Expected future payments for accruals, year one	$ 3
Expected future payments for accruals, year two	8
Expected future payments for accruals, year three	8
Expected future payments for accruals, year four	24
Expected future payments for accruals, year five	1
Expected future payments for accruals, thereafter	19
Minimum
Environmental Issues [Line Items]
Potential monetary sanctions threshold	1
SDG&E
Environmental Issues [Line Items]
Potential monetary sanctions threshold, actual amount	18
Capital expenditures for environmental issues	24	23	29
Accrual for environmental loss contingencies	16
Accrual for environmental loss contingencies, noncurrent	15
SoCalGas
Environmental Issues [Line Items]
Potential monetary sanctions threshold, actual amount	19
Capital expenditures for environmental issues	39	$ 42	$ 78
Accrued liability for environmental matters, discount	$ 18
Accrued liability for environmental matters, discount rate (as a percent)	2.24%
Accrual for environmental loss contingencies	$ 43
Accrual for environmental loss contingencies, current	2
Accrual for environmental loss contingencies, noncurrent	41
SDG&E and SoCalGas
Environmental Issues [Line Items]
Accrual for environmental loss contingencies, current	1
Manufactured-gas sites
Environmental Issues [Line Items]
Accrual for environmental loss contingencies	$ 39
Manufactured-gas sites | SDG&E
Environmental Issues [Line Items]
Number of sites complete | site	3
Number of sites in process | site	0
Accrual for environmental loss contingencies	$ 0
Manufactured-gas sites | SoCalGas
Environmental Issues [Line Items]
Number of sites complete | site	39
Number of sites in process | site	3
Accrual for environmental loss contingencies	$ 39
Waste Disposal Sites
Environmental Issues [Line Items]
Accrual for environmental loss contingencies	$ 8
Waste Disposal Sites | SDG&E
Environmental Issues [Line Items]
Number of sites complete | site	2
Number of sites in process | site	1
Accrual for environmental loss contingencies	$ 5
Waste Disposal Sites | SoCalGas
Environmental Issues [Line Items]
Number of sites complete | site	5
Number of sites in process | site	2
Accrual for environmental loss contingencies	$ 3
Other hazardous waste sites
Environmental Issues [Line Items]
Accrual for environmental loss contingencies	12
Other hazardous waste sites | SDG&E
Environmental Issues [Line Items]
Accrual for environmental loss contingencies	11
Other hazardous waste sites | SoCalGas
Environmental Issues [Line Items]
Accrual for environmental loss contingencies	1
SONGS Sites | SDG&E
Environmental Issues [Line Items]
Estimated SONGS mitigation costs, recoverable in rates	154
SONGS mitigation costs incurred	57
SONGS mitigation costs remaining	$ 97