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Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross $ 175.1 $ 146.2
Less accumulated depreciation (114.7) (96.4)
Property, plant and equipment, Net 60.4 49.8
Land [Member]
    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross 7.5 7.2
Buildings [Member]
    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross 10.8 6.5
Equipment [Member]
    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross 152.9 129.0
Work in Progress [Member]
    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Gross $ 3.9 $ 3.5