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Debt - Summary of Components of Long-Term Borrowings and Capital Lease Obligations (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Amended 2016 Credit Agreement $ 209.4 $ 277.0
Capital lease obligations 0.7 0.7
Total long-term borrowings and capital lease obligations, including current portion 210.1 277.7
Less: Current capital lease obligations 0.2 0.3
Total long-term borrowings and capital lease obligations $ 209.9 $ 277.4