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Acquisitions - Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Business Acquisition [Line Items]      
Current assets $ 1.9    
Property and equipment 57.4    
Goodwill   $ 20.4 $ 16.1
Intangible assets 95.4    
Current liabilities (5.2)    
Debt (54.7)    
Assets acquired and liabilities assumed 115.2    
Casino      
Business Acquisition [Line Items]      
Goodwill $ 20.4 $ 20.4 $ 0.0