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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Earnings Per Share [Abstract] |  |  |  |
Antidilutive shares excluded from diluted EPS (in shares) | 0 | 1,200 | 200 | 1,900
Earnings (loss) attributable to FMC stockholders: |  |  |  |
Continuing operations, net of income taxes | $ 70.4 | $ 48.9 | $ 163.1 | $ 119.5
Discontinued operations, net of income taxes | (15.2) | 30.8 | (157.4) | 73.7
Net income (loss) attributable to FMC stockholders | 55.2 | 79.7 | 5.7 | 193.2
Less: Distributed and undistributed earnings allocable to restricted award holders | (0.3) | (0.1) | (0.7) | (0.3)
Net income (loss) allocable to common stockholders | $ 54.9 | $ 79.6 | $ 5.0 | $ 192.9
Basic earnings (loss) per common share attributable to FMC stockholders: |  |  |  |
Continuing operations (in USD per share) | $ 0.52 | $ 0.36 | $ 1.21 | $ 0.89
Discontinued operations (in USD per share) | (0.11) | 0.23 | (1.17) | 0.55
Net income (loss) attributable to FMC stockholders (in USD per share) | 0.41 | 0.59 | 0.04 | 1.44
Diluted earnings (loss) per common share attributable to FMC stockholders: |  |  |  |
Continuing operations (in USD per share) | 0.52 | 0.36 | 1.20 | 0.89
Discontinued operations (in USD per share) | (0.11) | 0.23 | (1.16) | 0.55
Net income (loss) attributable to FMC stockholders (in USD per share) | $ 0.41 | $ 0.59 | $ 0.04 | $ 1.44
Shares: |  |  |  |
Weighted average number of shares of common stock outstanding - Basic (in shares) | 134,371 | 133,973 | 134,184 | 133,890
Weighted average additional shares assuming conversion of potential common shares (in shares) | 1,576 | 725 | 1,324 | 601
Shares – diluted basis (in shares) | 135,947 | 134,698 | 135,508 | 134,491

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