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DEBT AND CREDIT FACILITIES - FIRST MORTGAGE BONDS (Details) - USD ($) $ in Millions	1 Months Ended
	May 31, 2025	Mar. 31, 2025	Dec. 31, 2025
SDG&E
Debt Instrument [Line Items]
First mortgage bonds available for future issuance			$ 9,200
SDG&E \| First Mortgage Bonds, 5.40% April 15, 2035 \| Secured Debt
Debt Instrument [Line Items]
Debt amount		$ 850
Stated percentage rate		5.40%
Proceeds from issuance of debt		$ 840
Underwriting discounts and debt issuance costs		$ 10
SoCalGas
Debt Instrument [Line Items]
First mortgage bonds available for future issuance			$ 1,300
SoCalGas \| 5.45% June 15, 2035
Debt Instrument [Line Items]
Stated percentage rate			5.45%
SoCalGas \| 5.45% June 15, 2035 \| Secured Debt
Debt Instrument [Line Items]
Debt amount	$ 600
Stated percentage rate	5.45%
Proceeds from issuance of debt	$ 592
Underwriting discounts and debt issuance costs	8
SoCalGas \| 6.00% June 15, 2055
Debt Instrument [Line Items]
Stated percentage rate			6.00%
SoCalGas \| 6.00% June 15, 2055 \| Secured Debt
Debt Instrument [Line Items]
Debt amount	$ 500
Stated percentage rate	6.00%
Proceeds from issuance of debt	$ 488
Underwriting discounts and debt issuance costs	$ 12