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Related Party Transactions (Details)
$ in Millions
12 Months Ended
Dec. 31, 2022
USD ($)
property
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
JC Penney And SPARC Group | Lease_Income.      
Related Party Transactions      
Amounts charged to related party $ 83.8 $ 82.5 $ 54.1
Unconsolidated joint ventures | Amounts for services provided      
Related Party Transactions      
Amounts charged to related party $ 0.6 0.6 0.6
Properties owned by related parties | Amounts for services provided      
Related Party Transactions      
Number of shopping centers owned by related parties in which management services are provided | property 2    
Amounts charged to related party $ 3.8 3.5 3.3
Unconsolidated Joint Ventures | Amounts for services provided      
Related Party Transactions      
Amounts charged to related party 112.1 102.1 92.7
Unconsolidated Joint Ventures | Development, royalty and other fees      
Related Party Transactions      
Amounts charged to related party $ 12.1 $ 12.4 $ 13.1