CONSOLIDATED BALANCE SHEETS - SDG&E (Parentheticals) - shares	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000	50,000,000
Common stock, shares authorized (in shares)	750,000,000	750,000,000	750,000,000
Common stock, shares outstanding (in shares)	316,919,782	288,470,244	291,712,925
San Diego Gas and Electric Company [Member]
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, shares authorized (in shares)	45,000,000	45,000,000	45,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, shares authorized (in shares)	255,000,000	255,000,000	255,000,000
Common stock, shares outstanding (in shares)	117,000,000	117,000,000	117,000,000