SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - NONCONTROLLING INTERESTS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Earnings Per Share [Abstract]
Net income attributable to Sempra	$ 95	$ 649	$ 1,485	$ 2,186
Increase in shareholders’ equity from investor equity subscription	16		16
Increase in shareholders' equity from allocation of interest	635		635
Net transfers (to) from NCI	651		651
Change from net income attributable to Sempra and transfers (to) from NCI	$ 746		$ 2,136