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Commitments and Contingencies - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
ground_lease
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Long-term Purchase Commitment [Line Items]      
Commitments for contracts and executed leases, operating and redevelopment and development properties $ 868.0    
Weighted average discount rate 4.65%    
Weighted average remaining lease term 65 years    
Variable lease, cost $ 2.6 $ 3.0 $ 2.9
Ten year ground lease extension option      
Long-term Purchase Commitment [Line Items]      
Number of extension options | ground_lease 3    
Ground lease extension option term 10 years    
Forty-five year ground lease extension option      
Long-term Purchase Commitment [Line Items]      
Number of extension options | ground_lease 1    
Ground lease extension option term 45 years    
Environmental matters      
Long-term Purchase Commitment [Line Items]      
Accrued environmental remediation liabilities $ 75.2 $ 71.3