v3.26.1
Equity - Shares or Units Activity (Details)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Feb. 08, 2024
USD ($)
Aug. 10, 2026
$ / shares
Jun. 30, 2026
$ / shares
shares
Mar. 31, 2026
$ / shares
shares
Jun. 30, 2025
shares
Mar. 31, 2025
shares
Jun. 30, 2026
USD ($)
item
$ / shares
shares
Jun. 30, 2025
$ / shares
Dec. 31, 2025
$ / shares
shares
Feb. 05, 2026
USD ($)
Equity                    
Number of units redeemed (in units) | shares     237,618 6,100 300 36,291        
Shares repurchased (in shares) | shares     793,077 965,296            
Common stock dividend per share (in $ per share) | $ / shares     $ 2.25       $ 4.45 $ 4.2    
Subsequent Event | Q3 dividends                    
Equity                    
Dividends Payable, Date Declared   Aug. 10, 2026                
Dividends Payable, Date of Record   Sep. 09, 2026                
Dividends declared per common share (in dollars per share) | $ / shares   $ 2.25                
Dividends Payable, Date to be Paid   Sep. 30, 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) | 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) | shares             1,485,078      
Average share price repurchased (in dollars per share) | $ / shares             $ 192.59      
Simon Property Group, L.P.                    
Equity                    
Number of units redeemed (in units) | shares     237,618 6,100 300 36,291        
Distributions paid per unit (in dollars per unit) | $ / shares     $ 2.25       $ 4.45 $ 4.20    
Simon Property Group, L.P. | Subsequent Event | Q3 dividends                    
Equity                    
Dividends Payable, Date Declared   Aug. 10, 2026                
Dividends Payable, Date of Record   Sep. 09, 2026                
Distribution declared per unit (in dollars per share) | $ / shares   $ 2.25                
Dividends Payable, Date to be Paid   Sep. 30, 2026                
Simon Property Group, L.P. | Limited Partner                    
Equity                    
Number of units redeemed (in units) | shares             243,718      
Number of limited partners whose common stock redeemed | item             6      
Value of units redeemed | $             $ 51.9