Debt - Summary of Components of Long-Term Borrowings and Capital Lease Obligations (Details) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Amended 2016 Credit Agreement	[1]	$ 216.2	$ 209.4
Finance lease obligations		0.6	0.7
Total long-term borrowings and finance lease obligations, including current portion		216.8	210.1
Less: Current finance lease obligations		0.2	0.2
Total long-term borrowings and finance lease obligations		$ 216.6	$ 209.9

[1] Defined as the Amended and Restated Credit Agreement, dated January 27, 2016, as amended on June 2, 2017.