SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - PREFERRED STOCK NARRATIVE (Details) - shares	Sep. 30, 2024	May 02, 2024	May 01, 2024	Dec. 31, 2023
Preferred Stock [Line Items]
Preferred stock, shares authorized (in shares)	50,000,000			50,000,000
Series A Preferred Stock
Preferred Stock [Line Items]
Preferred stock, shares authorized (in shares)		0	17,250,000
Series B Preferred Stock
Preferred Stock [Line Items]
Preferred stock, shares authorized (in shares)		0	5,750,000