SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - COMMON STOCK NARRATIVE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Nov. 30, 2024
Equity, Class of Treasury Stock [Line Items]
Common stock, shares authorized (in shares)	1,125,000,000		1,125,000,000
Common stock
Equity, Class of Treasury Stock [Line Items]
Shares withheld for tax purposes (in shares)	671,961	552,799
Shares withheld for tax purposes	$ 57	$ 40
At The Market Program Offering
Equity, Class of Treasury Stock [Line Items]
Aggregate sales price				$ 3,000
Underwriting commission, percent				1.00%
Aggregate sales price remaining	$ 2,600