SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Earnings attributable to common shares, basic	$ 906	$ 801
Earnings attributable to common shares, diluted	$ 906	$ 801
Weighted-average common shares outstanding for basic EPS (in shares)	651,992,000	632,821,000
Dilutive effect of common shares sold forward (in shares)	0	673,000
Dilutive effect of stock options and RSUs (in shares)	1,026,000	1,860,000
Weighted-average common shares outstanding for diluted EPS (in shares)	653,018,000	635,354,000
Earnings per share, basic (dollars per share)	$ 1.39	$ 1.27
Earnings per share, diluted (in dollars per share)	$ 1.39	$ 1.26
Vested RSUs included in basic WASO (in shares)	516,000	624,000
Stock options, RSAs and RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Non-qualified stock options granted (in shares)	303,614
Performance-based RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Equity awards, granted (in shares)	601,483
Service-based RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Equity awards, granted (in shares)	238,399
Stock options, RSAs and RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Antidilutive securities excluded from earnings per share (in shares)	522,283	1,356,470