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Property and Equipment - Schedule of Property and Equipment and Related Amortization Recorded Under Capital Leases (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Less: accumulated depreciation $ (25.7)  
Capital leases, net 44.4  
Service vehicles    
Property, Plant and Equipment [Line Items]    
Capital leased assets, gross 107.4 $ 109.9
Less: accumulated depreciation (55.2) (41.8)
Capital leases, net 52.2 $ 68.1
Land, building and leasehold improvements    
Property, Plant and Equipment [Line Items]    
Capital leased assets, gross $ 70.1