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Components of Inventories (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Inventories [Line Items]    
Raw materials and manufacturing supplies $ 214.2 $ 218.0
Work in process 158.8 171.2
Finished goods 229.3 218.1
LIFO reserve (92.1) (96.4)
Total $ 510.2 $ 510.9