SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - NET INCOME ATTRIBUTABLE TO SEMPRA AND TRANSFERS (TO) FROM NCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net income attributable to Sempra	$ 649	$ 732	$ 2,186	$ 2,327
Decrease in shareholders’ equity for sales of NCI		(62)		(44)
Net transfers (to) from NCI		(62)		(44)
Change from net income attributable to Sempra and transfers (to) from NCI		$ 670		$ 2,283