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Segment Information Segment Information, Transaction Related Charges (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |
Total transaction-related charges | $ 156.5 | $ 150.4 | $ 23.4
Legal and Professional Fees | DuPont |  |  |
Segment Reporting Information [Line Items] |  |  |
Acquisition-related costs | 86.9 | 130.2 | 0.0
Legal and Professional Fees | Cheminova |  |  |
Segment Reporting Information [Line Items] |  |  |
Acquisition-related costs | 0.0 | 0.0 | 23.4
Inventory Fair Value Amortization | DuPont |  |  |
Segment Reporting Information [Line Items] |  |  |
Acquisition-related costs | $ 69.6 | $ 20.2 | $ 0.0

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of restructuring charges, remediation cost, and asset impairment loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=fmc_CheminovaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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