SEMPRA - SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE - COMMON STOCK ACTIVITY (Details) - shares	1 Months Ended	12 Months Ended
	May 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Common stock, shares authorized (in shares)		750,000,000	750,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares outstanding, January 1		316,919,782	288,470,244	291,712,925
Conversion of mandatory convertible preferred stock		0	18,037,745	0
Shares issued in IEnova exchange offer	12,306,777	0	12,306,777	0
RSUs vesting		457,222	686,916	896,839
Stock options exercised		40,630	50,671	4,400
Savings plan issuance		0	0	201,431
Common stock investment plan		0	0	42,955
Issuance of RSUs held in our Deferred Compensation Plan		65,013	102,238	103,552
Shares repurchased		(3,147,969)	(2,734,809)	(4,491,858)
Common shares outstanding, December 31		314,334,678	316,919,782	288,470,244