0001063761 2026-02-05 2026-02-05 0001063761 us-gaap:CommonStockMember 2026-02-05 2026-02-05 0001063761 spg:SeriesJPreferredStockMember 2026-02-05 2026-02-05 false 0001063761 8-K 2026-02-05 SIMON PROPERTY GROUP, INC. IN 001-14469 04-6268599 225 West Washington Street Indianapolis IN 46204 317 636-1600 false false false false Common stock, $0.0001 par value SPG NYSE 83/8% Series J Cumulative Redeemable Preferred Stock, $0.0001 par value SPGJ NYSE false