SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Earnings attributable to common shares, basic	$ 638	$ 721	$ 2,152	$ 2,293
Earnings attributable to common shares, diluted	$ 638	$ 721	$ 2,152	$ 2,293
Weighted-average common shares outstanding for basic EPS (in shares)	633,752,000	630,036,000	633,342,000	629,963,000
Dilutive effect of common shares sold forward (in shares)	2,312,000	0	1,375,000	0
Dilutive effect of stock options and RSUs (in shares)	1,997,000	2,288,000	1,849,000	2,268,000
Weighted-average common shares outstanding for diluted EPS (in shares)	638,061,000	632,324,000	636,566,000	632,231,000
Earnings per share, basic (dollars per share)	$ 1.01	$ 1.14	$ 3.40	$ 3.64
Earnings per share, diluted (in dollars per share)	$ 1.00	$ 1.14	$ 3.38	$ 3.63
Vested RSUs included in basic WASO (in shares)	615,000	716,000	616,000	716,000
Stock options, RSAs and RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Non-qualified stock options granted (in shares)			414,812
Performance-based RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Equity awards, granted (in shares)			721,049
Service-based RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Equity awards, granted (in shares)			312,043
Stock options, RSAs and RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Antidilutive securities excluded from earnings per share (in shares)	450,243	624,242	996,966	470,804