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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Earnings Per Share [Abstract] |  |  |  |
Antidilutive shares excluded from diluted EPS (in shares) | 0 | 1,300 | 800 | 1,800
Earnings (loss) attributable to FMC stockholders: |  |  |  |
Continuing operations, net of income taxes | $ 48.2 | $ 45.0 | $ 92.7 | $ 70.6
Discontinued operations, net of income taxes | 26.5 | 20.2 | (142.2) | 42.9
Net income (loss) attributable to FMC stockholders | 74.7 | 65.2 | (49.5) | 113.5
Less: Distributed and undistributed earnings allocable to restricted award holders | (0.2) | (0.1) | (0.4) | (0.2)
Net income (loss) allocable to common stockholders | $ 74.5 | $ 65.1 | $ (49.9) | $ 113.3
Basic earnings (loss) per common share attributable to FMC stockholders: |  |  |  |
Continuing operations (in USD per share) | $ 0.36 | $ 0.34 | $ 0.69 | $ 0.52
Discontinued operations (in USD per share) | 0.20 | 0.15 | (1.06) | 0.32
Net income (loss) attributable to FMC stockholders (in USD per share) | 0.56 | 0.49 | (0.37) | 0.84
Diluted earnings (loss) per common share attributable to FMC stockholders: |  |  |  |
Continuing operations (in USD per share) | 0.36 | 0.34 | 0.69 | 0.52
Discontinued operations (in USD per share) | 0.20 | 0.15 | (1.06) | 0.32
Net income (loss) attributable to FMC stockholders (in USD per share) | $ 0.56 | $ 0.49 | $ (0.37) | $ 0.84
Shares: |  |  |  |
Weighted average number of shares of common stock outstanding - Basic (in shares) | 134,237 | 133,929 | 134,095 | 133,865
Weighted average additional shares assuming conversion of potential common shares (in shares) | 1,366 | 647 | 1,233 | 570
Shares – diluted basis (in shares) | 135,603 | 134,576 | 135,328 | 134,435

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