Facility Consolidation Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 0.6	$ 3.5	$ 0.0
Charges	0.0	4.5	4.6
Payments	(0.2)	(7.4)	(1.1)
Restructuring reserve, ending balance	0.4	0.6	3.5
Selling, General and Administrative Expenses
Restructuring Reserve [Roll Forward]
Charges			4.6
Employee Termination Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0.2	3.5	0.0
Charges	0.0	1.6	4.6
Payments	(0.2)	(4.9)	(1.1)
Restructuring reserve, ending balance	0.0	0.2	3.5
Facility Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0.4	0.0	0.0
Charges	0.0	2.9	0.0
Payments	0.0	(2.5)	0.0
Restructuring reserve, ending balance	$ 0.4	$ 0.4	$ 0.0