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Inventories (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw material and supplies $ 263.8 $ 264.0
Work in progress 77.2 82.0
Finished goods 112.5 117.6
FIFO inventories 453.5 463.6
LIFO reserve (14.3) (16.0)
Inventories, net $ 439.2 $ 447.6