DEBT AND CREDIT FACILITIES - LONG-TERM DEBT (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2026	Mar. 31, 2025
Debt Instrument [Line Items]
Issuances of debt (maturities greater than 90 days)		$ 3,345	$ 2,941
SDG&E
Debt Instrument [Line Items]
Issuances of debt (maturities greater than 90 days)		1,096	$ 848
Mortgages | First Mortgage Bonds Due March 2036 | SDG&E
Debt Instrument [Line Items]
Debt amount	$ 625	$ 625
Debt instrument, interest rate	5.20%	5.20%
Issuances of debt (maturities greater than 90 days)	$ 618
Unamortized debt issuance costs	7	$ 7
Mortgages | First Mortgage Bonds Due March 2056 | SDG&E
Debt Instrument [Line Items]
Debt amount	$ 475	$ 475
Debt instrument, interest rate	5.95%	5.95%
Issuances of debt (maturities greater than 90 days)	$ 467
Unamortized debt issuance costs	$ 8	$ 8