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Condensed Consolidated Balance Sheets (Parentheticals) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Statement of Financial Position [Abstract]    
Allowance for trade receivables $ 24.8 $ 17.6
Preferred stock, par value (in USD per share) $ 0 $ 0
Preferred stock, shares authorized (in shares) 5,000,000 5,000,000
Preferred stock, shares issued (in shares) 0 0
Common stock, par value (in USD per share) $ 0.1 $ 0.10
Common stock, shares authorized (in shares) 260,000,000 260,000,000
Common stock, shares issued (in shares) 185,983,792 185,983,792
Treasury Stock, shares (in shares) 51,982,265 52,293,686