Supplemental Information - Accrued Expenses (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued interest	$ 3.1	$ 3.2
Accrued taxes	1.7	1.5
Accrued freight	1.9	1.5
Accrued rebates	4.9	2.2
Restructuring reserves (Note 15)	0.2	2.2
Separation-related Reimbursement Awards (Note 14)	0.9	2.1
Accrued royalties and commissions	1.7	1.5
Other	5.6	5.1
Accrued expenses	$ 20.0	$ 19.3