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Acquisitions - Summary of Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Jan. 11, 2019
Dec. 31, 2018
Business Acquisition [Line Items]      
Goodwill $ 363.8   $ 338.0
Presque Isle      
Business Acquisition [Line Items]      
Current assets   $ 2.1  
Property and equipment   78.5  
Goodwill   25.8  
Intangible assets   71.2  
Current liabilities   (4.9)  
Non-current liabilities   (0.6)  
Assets acquired and liabilities assumed   $ 172.1