GENERAL INFORMATION AND OTHER FINANCIAL DATA - CAPITALIZED FINANCING COSTS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Capitalized Financing Costs Disclosure [Line Items]
Capitalized financing costs	$ 239	$ 174
SDG&E
Capitalized Financing Costs Disclosure [Line Items]
Capitalized financing costs	23	25
SoCalGas
Capitalized Financing Costs Disclosure [Line Items]
Capitalized financing costs	$ 22	$ 25