v3.26.3
Significant Accounting Policies - Noncontrolling Interests, Simon Property Group, Inc. (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Significant Accounting Policies    
Limited partners' interests in the Operating Partnership $ 699,380 $ 884,913
Nonredeemable noncontrolling interests in properties, net 355,303 378,906
Total noncontrolling interests reflected in equity $ 1,054,683 $ 1,263,819