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Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Allowance for trade receivables | $ 17.5 | $ 13.9
Preferred stock, par value (in USP per share) | $ 0 | $ 0
Preferred stock, shares authorized | 5,000,000 | 5,000,000
Preferred stock, shares issued | 0 | 0
Common stock, par value (in USD per share) | $ 0.1 | $ 0.10
Common stock, shares authorized | 260,000,000 | 260,000,000
Common stock, shares issued | 185,983,792 | 185,983,792
Treasury Stock, shares | 52,232,244 | 52,328,015

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