SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - COMMON STOCK ACTIVITY (Details) - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares outstanding, January 1	631,431,732	628,669,356	633,839,564
Shares issued under forward sale agreements	17,142,858	0	0
Shares issued to underwriters to cover overallotments	0	2,099,152	0
RSUs vesting	1,320,561	941,910	914,444
Stock options exercised	143,944	0	81,260
Common stock investment plan	1,151,877	1,730	0
Issuance of RSUs held in our Deferred Compensation Plan	128,207	132,178	130,026
Shares repurchased	(689,303)	(412,594)	(6,295,938)
Common shares outstanding, December 31	650,629,876	631,431,732	628,669,356