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Acquisitions - Summary of Intangible Assets Acquired (Details) - USD ($)
$ in Millions
Aug. 31, 2018
Jan. 11, 2019
Saratoga New York And Saratoga Colorado    
Business Acquisition [Line Items]    
Intangible assets $ 95.4  
Other | Saratoga New York And Saratoga Colorado    
Business Acquisition [Line Items]    
Intangible assets $ 0.1  
Weighted-Average Useful Life 1 year 3 months 18 days  
Gaming rights | Saratoga New York And Saratoga Colorado    
Business Acquisition [Line Items]    
Intangible assets $ 87.0  
Trademark | Saratoga New York And Saratoga Colorado    
Business Acquisition [Line Items]    
Intangible assets $ 8.3  
Presque Isle    
Business Acquisition [Line Items]    
Intangible assets   $ 71.2
Presque Isle | Gaming rights    
Business Acquisition [Line Items]    
Intangible assets   56.0
Presque Isle | Trademark    
Business Acquisition [Line Items]    
Intangible assets   $ 15.2