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Plant, Property and Equipment, Net (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]    
Land and improvements $ 17.0 $ 17.2
Buildings and improvements 170.6 163.1
Machinery and equipment 760.7 737.7
Furniture, fixtures and office equipment 63.1 61.8
Construction work in progress 33.5 46.5
Other 7.8 8.2
Plant, property and equipment, gross 1,052.7 1,034.5
Less - accumulated depreciation (728.8) (710.4)
Plant, property and equipment, net $ 323.9 $ 324.1