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Leasing Arrangements - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Jan. 01, 2019
Dec. 31, 2018
Leases Disclosure [Line Items]        
Weighted average remaining lease term 20 years      
Lease Term 20 years      
Percent rents in excess of minimum rents $ 62.1 $ 69.7    
Lease right-of-use asset, net 12,325.2   $ 12,500.0 $ 0.0
Operating Lease, Liability $ 12,397.4   $ 12,500.0  
Weighted Average Discount Rate, Percent 4.10%      
Minimum [Member]        
Leases Disclosure [Line Items]        
Escalation Timing 1 year      
Maximum [Member]        
Leases Disclosure [Line Items]        
Escalation Timing 5 years