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Inventories (Detail) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Inventory Disclosure [Line Items]    
Finished goods $ 194,900,000 $ 194,600,000
Work in process 19,900,000 19,100,000
Raw materials 117,800,000 114,800,000
Inventory, net, total $ 332,600,000 $ 328,500,000