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, 2026	Mar. 31, 2026	Mar. 31, 2025
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Earnings attributable to common shares, basic		$ 1,037	$ 906
Earnings attributable to common shares, diluted		$ 1,037	$ 906
Weighted-average common shares outstanding for basic EPS (in shares)		653,589,000	651,992,000
Dilutive effect of common shares sold forward (in shares)		482,000	0
Dilutive effect of stock options and RSUs (in shares)		1,417,000	1,026,000
Weighted-average common shares outstanding for diluted EPS (in shares)		655,488,000	653,018,000
Earnings per share, basic (dollars per share)		$ 1.59	$ 1.39
Earnings per share, diluted (in dollars per share)		$ 1.58	$ 1.39
Vested RSUs included in basic WASO (in shares)		385,000	516,000
Stock options, RSAs and RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Non-qualified stock options granted (in shares)	568,052
Performance-based RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Equity awards, granted (in shares)	435,890
Service-based RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Equity awards, granted (in shares)	181,488
Stock options, RSAs and RSUs
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Antidilutive securities excluded from earnings per share (in shares)		561,740	522,283