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Operating Leases - Schedule of Operating Lease Liability, Maturity (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Leases [Abstract]      
Liability, Payment, Remainder of fiscal year $ 12.9    
Liability, Payment, Next twelve months (2020) 14.2    
Liability, Payments, Due year two (2021) 11.8    
Liability, Payments, Due year three (2022) 9.4    
Liability, Payments, Due year four (2023) 8.9    
Liability, Payments, Due after year five 64.5    
Total minimum lease payments 121.7    
Less imputed interest (27.8)    
Operating lease liabilities $ 93.9 $ 93.6 $ 0.0