SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Jan. 31, 2024	Mar. 31, 2024	Mar. 31, 2023
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Earnings attributable to common shares, basic		$ 801	$ 969
Earnings attributable to common shares, diluted		$ 801	$ 969
Weighted-average common shares outstanding for basic EPS (in shares)		632,821,000	629,838,000
Dilutive effect of common shares sold forward (in shares)		673,000	0
Dilutive effect of stock options and RSUs (in shares)		1,860,000	2,410,000
Weighted-average common shares outstanding for diluted EPS (in shares)		635,354,000	632,248,000
Earnings per share, basic (dollars per share)		$ 1.27	$ 1.54
Earnings per share, diluted (in dollars per share)		$ 1.26	$ 1.53
Vested RSUs included in basic WASO (in shares)		624,000	721,000
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)	702,194
Service-based RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Equity awards, granted (in shares)	288,806
Stock options, RSAs and RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Antidilutive securities excluded from earnings per share (in shares)		1,356,470	360,030