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, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Earnings attributable to common shares, basic	$ 77	$ 638	$ 1,444	$ 2,152
Earnings attributable to common shares, diluted	$ 77	$ 638	$ 1,444	$ 2,152
Weighted-average common shares outstanding for basic EPS (in shares)	652,948,000	633,752,000	652,538,000	633,342,000
Dilutive effect of common shares sold forward (in shares)	267,000	2,312,000	123,000	1,375,000
Dilutive effect of stock options and RSUs (in shares)	794,000	1,997,000	759,000	1,849,000
Weighted-average common shares outstanding for diluted EPS (in shares)	654,009,000	638,061,000	653,420,000	636,566,000
Earnings per share, basic (dollars per share)	$ 0.12	$ 1.01	$ 2.21	$ 3.40
Earnings per share, diluted (in dollars per share)	$ 0.12	$ 1.00	$ 2.21	$ 3.38
Vested RSUs included in basic WASO (in shares)	492,000	615,000	502,000	616,000
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)			628,413
Service-based RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Equity awards, granted (in shares)			260,012
Stock options, RSAs and RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Antidilutive securities excluded from earnings per share (in shares)	331,462	450,243	743,454	996,966