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Investment In and Advances to Unconsolidated Affiliates - Additional Information (Details)
$ in Millions
12 Months Ended
Mar. 06, 2019
USD ($)
Mar. 05, 2019
USD ($)
Dec. 31, 2019
USD ($)
joint_venture
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Mar. 04, 2019
USD ($)
Aug. 31, 2018
Aug. 30, 2018
Jul. 16, 2018
Jan. 01, 2017
Schedule of Equity Method Investments [Line Items]                    
Number of immaterial joint ventures | joint_venture     2              
Distributions from unconsolidated affiliates     $ 38.1 $ 19.8 $ 18.0          
Deferred tax liability     212.8 78.2            
Other assets, net     240.1 106.7            
Property and equipment, net     $ 256.1 $ 95.7            
Miami Valley Gaming LLC                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investment, ownership percentage     50.00%              
Midwest Gaming Holdings, LLC                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investment, ownership percentage   42.00% 61.30%              
Aggregated cash consideration paid at closing of the Sale Transaction   $ 406.6                
Deferred tax liability   103.2       $ 103.2        
Carrying value of equity method investment   835.0 $ 834.2              
Other assets, net   853.7                
Midwest Gaming Holdings, LLC | Grandstands and buildings                    
Schedule of Equity Method Investments [Line Items]                    
Property and equipment, net   (9.5)                
Property, plant, and equipment, useful life     35 years 3 months 18 days              
Midwest Gaming Holdings, LLC | Land                    
Schedule of Equity Method Investments [Line Items]                    
Property and equipment, net   (13.7)                
Midwest Gaming Holdings, LLC | Personal property                    
Schedule of Equity Method Investments [Line Items]                    
Carrying value of equity method investment           $ 4.5        
Property, plant, and equipment, useful life     3 years 8 months 12 days              
Clairvest Group Inc.                    
Schedule of Equity Method Investments [Line Items]                    
Transaction costs and working capital adjustments   3.5                
Ocean Downs                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investment, ownership percentage             100.00% 50.00% 50.00% 50.00%
Saratoga Casino Holdings LLC                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investment, ownership percentage             25.00%   25.00%  
Delaware North Companies Gaming & Entertainment Inc. | Miami Valley Gaming LLC                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investment, ownership percentage     50.00%              
Midwest Gaming Holdings, LLC                    
Schedule of Equity Method Investments [Line Items]                    
Proceeds from new credit facilities $ 300.0 $ 300.0                
High Plaines | Midwest Gaming Holdings, LLC                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investment, ownership percentage     36.00%              
Midwest Gaming and Casino Investors | Midwest Gaming Holdings, LLC                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investment, ownership percentage     2.70%