SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - COMMON STOCK ACTIVITY (Details) - shares	1 Months Ended	12 Months Ended
	May 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares outstanding, January 1		628,669,356	633,839,564	576,940,488
Conversion of mandatory convertible preferred stock		0	0	36,075,490
Shares issued under forward sale agreements		2,099,152	0	0
Shares issued in IEnova exchange offer	24,613,554	0	0	24,613,554
RSUs vesting		941,910	914,444	1,373,832
Stock options exercised		0	81,260	101,342
Common stock investment plan		1,730	0	0
Issuance of RSUs held in our Deferred Compensation Plan		132,178	130,026	204,476
Shares repurchased		(412,594)	(6,295,938)	(5,469,618)
Common shares outstanding, December 31		631,431,732	628,669,356	633,839,564