SEMPRA - INVESTMENTS IN UNCONSOLIDATED ENTITIES - SUMMARIZED FINANCIAL INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Schedule of Equity Method Investments [Line Items]
Interest expense	$ (382)	$ (433)
Income tax expense	(65)	(57)
Net income	1,150	919
Earnings attributable to Sempra	1,037	906
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Oncor Holdings
Schedule of Equity Method Investments [Line Items]
Operating revenues	1,724	1,548
Operating expenses	(1,272)	(1,157)
Income from operations	452	391
Interest expense	(227)	(185)
Income tax expense	(47)	(40)
Net income	211	179
NCI held by TTI	(42)	(36)
Earnings attributable to Sempra	$ 169	$ 143