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, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Earnings attributable to common shares	$ 2,817	$ 3,030	$ 2,094
Earnings attributable to common shares, diluted	$ 2,817	$ 3,030	$ 2,094
Weighted-average common shares outstanding for basic EPS (in shares)	633,795	630,296	630,318
Dilutive effect of stock options and RSUs (in shares)	2,112	2,341	2,439
Dilutive effect of common shares sold forward (in shares)	2,036	96	0
Weighted-average number of shares outstanding, diluted (in shares)	637,943	632,733	632,757
Basic earnings per common share (usd per share)	$ 4.44	$ 4.81	$ 3.32
Diluted earnings per common share (usd per share)	$ 4.42	$ 4.79	$ 3.31
Fully vested RSUs included in the computation of EPS	617	717	805