Components of Property, Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Land	$ 26.0	$ 26.0
Buildings and improvements	281.3	276.8
Machinery and equipment	582.7	562.7
Software	80.9	80.6
Office equipment and other assets	55.4	55.1
Construction in progress	24.6	21.0
Gross Property, Plant and Equipment	1,050.9	1,022.2
Less accumulated depreciation and amortization	474.9	436.2
Net Property, Plant and Equipment	$ 576.0	$ 586.0