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Financial Instruments, Risk Management and Fair Value Measurements - Nonrecurring Fair Value (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Derivative [Line Items] |  |
Net assets of discontinued operations held for sale | $ (1.3) | $ (1.0)
FMC Agricultural Solutions |  |
Derivative [Line Items] |  |
Impairment charge | 1.3 | 1.0
Fair Value, Measurements, Nonrecurring | Estimate of Fair Value Measurement |  |
Derivative [Line Items] |  |
Net assets of discontinued operations held for sale | 4.3 | 5.9
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring |  |
Derivative [Line Items] |  |
Net assets of discontinued operations held for sale | 0.0 | 0.0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring |  |
Derivative [Line Items] |  |
Net assets of discontinued operations held for sale | 0.0 | 0.0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring |  |
Derivative [Line Items] |  |
Net assets of discontinued operations held for sale | $ 4.3 | $ 5.9

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