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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Millions, except Share data, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Statement of Financial Position [Abstract]    
Accounts Receivable, allowances (in dollars) $ 15.2 $ 13.5
Common stock, shares authorized 300,000,000 300,000,000
Common stock, shares issued 163,175,928 163,175,928
Common stock, shares outstanding 133,535,508 132,769,478
Treasury stock, shares 29,640,420 30,406,450