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Discontinued Operations (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Summary of net trade sales and pre-tax operating losses classified as Discontinued Operations      
Net trade sales $ 0 $ 0.2 $ 26.1
Pre-tax operating loss $ 0 $ 1.1 $ 13.1