Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, plant and equipment, net
Increase (Decrease) in Capitalized Expenditures in Other Liabilities	$ 1.8	$ (2.2)	$ 1.3
Gain (Loss) on Disposition of Property Plant Equipment	(0.1)	(2.0)	0.0
Gross property, plant and equipment	602.3	572.5
Less: Accumulated depreciation and amortization	301.0	265.5
Net property, plant and equipment	301.3	307.0
Net capitalized turnaround costs:
Beginning balance	37.8	16.7	22.7
Additions	4.9	33.6	0.3
Depreciation	(16.1)	(12.5)	(6.3)
Ending balance	26.6	37.8	$ 16.7
Land
Property, plant and equipment, net
Gross property, plant and equipment	1.4	1.6
Buildings and improvements
Property, plant and equipment, net
Gross property, plant and equipment	16.7	14.5
Machinery and equipment
Property, plant and equipment, net
Gross property, plant and equipment	562.3	537.5
Construction in progress
Property, plant and equipment, net
Gross property, plant and equipment	$ 21.9	$ 18.9