XML 81 R60.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Equity - Common Stock and Unit Issuances and Repurchases (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Feb. 11, 2019
USD ($)
Sep. 25, 2018
shares
Feb. 13, 2017
USD ($)
Dec. 31, 2019
USD ($)
item
$ / shares
shares
Dec. 31, 2018
USD ($)
item
$ / shares
shares
Dec. 31, 2017
shares
Equity            
Minimum number of additional classes or series of common stock that the Board is authorized to reclassify from excess common stock | item       1    
Exchange of limited partner units, (in shares)       24,000 92,732 500,411
Redemption of units       43,255 454,704  
Period common stock is authorized to repurchase 2 years   2 years      
Common stock authorized for repurchase | $ $ 2,000.0   $ 2,000.0      
Shares repurchased (in shares)       2,247,074 2,275,194 2,468,630
Average share price repurchased (in dollars per share) | $ / shares       $ 160.11    
2017 Share Repurchase Program            
Equity            
Shares repurchased (in shares)       46,377 2,275,194  
Average share price repurchased (in dollars per share) | $ / shares       $ 164.49 $ 155.64  
Simon Property Group, L.P.            
Equity            
Redemption of units       43,255 454,704  
Outlets at Orange            
Equity            
Ownership interests acquired (as a percent)   50.00%        
Outlets at Orange | Simon Property Group, L.P.            
Equity            
Number of units issued in connection with acquisition of the remaining interest in orange outlet   475,183        
Class B common stock            
Equity            
Common Stock, Shares, Outstanding       8,000 8,000  
Number of voting trusts which are subject to outstanding shares common stock | item       2    
Common Stock            
Equity            
Number of votes entitled per share to holders of common stock | item       1    
Limited Partners            
Equity            
Exchange of limited partner units, (in shares)       24,000 92,732  
Number of limited partners who received common stock | item         2  
Limited Partners | Simon Property Group, L.P.            
Equity            
Redemption of units       43,255 454,704  
Value of units redeemed | $       $ 6.8 $ 81.5  
Number of limited partners who received common stock | item       9 8  
Maximum | Class B common stock            
Equity            
Number of members of board of directors elected under entitlement of right | item       4