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Consolidated Balance Sheets (Parenthetical) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Dec. 31, 2012
Statement of Financial Position [Abstract]    
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax $ (0.1)  
Allowance for doubtful accounts $ 1.5 $ 2.3
Common stock, par value (usd per share) $ 1 $ 1
Common stock, shares authorized (shares) 90,000,000 90,000,000
Common stock, shares issued (shares) 63,900,000 63,800,000
Treasury stock, shares (shares) 1,000,000 1,000,000