Property, Plant and Equipment, net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Property, plant and equipment, net
Document Period End Date	Mar. 31, 2017
Gross property, plant and equipment	$ 609.6		$ 602.3
Less: Accumulated depreciation and amortization	311.2		301.0
Net property, plant and equipment	298.4		301.3
Loss on disposal of property, plant and equipment	0.0	$ 0.1
Net capitalized turnaround costs:
Beginning balance	26.6	37.8
Additions	0.6	1.2
Depreciation	(4.1)	(3.6)
Ending balance	23.1	$ 35.4
Land
Property, plant and equipment, net
Gross property, plant and equipment	1.4		1.4
Buildings and improvements
Property, plant and equipment, net
Gross property, plant and equipment	16.8		16.7
Machinery and equipment
Property, plant and equipment, net
Gross property, plant and equipment	565.3		562.3
Construction in progress
Property, plant and equipment, net
Gross property, plant and equipment	$ 26.1		$ 21.9