SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - EARNINGS (LOSSES) PER COMMON SHARE COMPUTATIONS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share [Abstract]
Earnings attributable to common shares	$ 3,030	$ 2,094	$ 1,254
Earnings attributable to common shares, diluted	$ 3,030	$ 2,094	$ 1,254
Weighted-average common shares outstanding for basic EPS (in shares)	630,296	630,318	623,510
Dilutive effect of stock options and RSUs (in shares)	2,341	2,439	1,506
Dilutive effect of common shares sold forward (in shares)	96	0	0
Dilutive effect of mandatory convertible preferred stock (in shares)	0	0	1,057
Weighted-average number of shares outstanding, diluted (in shares)	632,733	632,757	626,073
Basic earnings per common share (usd per share)	$ 4.81	$ 3.32	$ 2.01
Diluted earnings per common share (usd per share)	$ 4.79	$ 3.31	$ 2.01
Fully vested RSUs included in the computation of EPS	717	805	907