v3.26.3
Equity - Shares or Units Activity (Details)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Feb. 08, 2024
USD ($)
Nov. 05, 2026
$ / shares
Sep. 30, 2026
$ / shares
shares
Jun. 30, 2026
shares
Mar. 31, 2026
$ / shares
shares
Sep. 30, 2025
shares
Jun. 30, 2025
shares
Mar. 31, 2025
shares
Sep. 30, 2026
USD ($)
item
$ / shares
shares
Sep. 30, 2025
$ / shares
Dec. 31, 2025
$ / shares
shares
Feb. 05, 2026
USD ($)
Equity                        
Shares of common stock issued to limited partners     70,000         116,558        
Number of units redeemed (in units)     637 237,618 6,100 840 300 36,291        
Shares repurchased (in shares)     1,137,182 793,077 965,296              
Common stock dividend per share (in $ per share) | $ / shares     $ 2.25           $ 6.7 $ 6.35    
Subsequent Event | Q4 dividends                        
Equity                        
Dividends Payable, Date Declared   Nov. 05, 2026                    
Dividends Payable, Date of Record   Dec. 10, 2026                    
Dividends declared per common share (in dollars per share) | $ / shares   $ 2.3                    
Dividends Payable, Date to be Paid   Dec. 31, 2026                    
Common stock repurchase program                        
Equity                        
Common stock authorized for repurchase | $ $ 2,000.0                      
Period in which common stock is authorized to be repurchased (in years) 2 years                      
Shares repurchased (in shares)         273,295           1,246,190  
Average share price repurchased (in dollars per share) | $ / shares         $ 182.95           $ 182.02  
New common stock repurchase program                        
Equity                        
Common stock authorized for repurchase | $                       $ 2,000.0
Shares repurchased (in shares)                 2,622,260      
Average share price repurchased (in dollars per share) | $ / shares                 $ 199.26      
Simon Property Group, L.P.                        
Equity                        
Number of units redeemed (in units)     637 237,618 6,100 840 300 36,291        
Distributions paid per unit (in dollars per unit) | $ / shares     $ 2.25           $ 6.70 $ 6.35    
Simon Property Group, L.P. | Subsequent Event | Q4 dividends                        
Equity                        
Dividends Payable, Date Declared   Nov. 05, 2026                    
Dividends Payable, Date of Record   Dec. 10, 2026                    
Distribution declared per unit (in dollars per share) | $ / shares   $ 2.30                    
Dividends Payable, Date to be Paid   Dec. 31, 2026                    
Simon Property Group, L.P. | Limited Partner                        
Equity                        
Shares of common stock issued to limited partners                 70,000      
Number of units redeemed (in units)                 244,355      
Number of limited partners whose common stock redeemed | item                 7      
Value of units redeemed | $                 $ 52.0