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Inventories - Inventories and Reduction of Certain Inventories to LIFO Basis (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw materials $ 141.6 $ 128.4
Work in process 124.4 117.0
Finished goods 590.3 542.4
Subtotal (at FIFO) 856.3 787.8
Reduction of certain inventories to LIFO basis (52.4) (51.4)
Total $ 803.9 $ 736.4