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v3.10.0.1

Debt - Credit Facility (Details) | 9 Months Ended
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Sep. 30, 2018
Line of Credit Facility [Line Items] |
Covenant compliance, actual leverage ratio | 2.4
Maximum leverage ratio | 4.5
Covenant compliance, actual interest coverage ratio | 9.3
Minimum interest coverage | 3.5
FMC Lithium Revolving Credit Facility |
Line of Credit Facility [Line Items] |
Maximum leverage ratio | 3.5
Minimum interest coverage | 3.5

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- Definition Covenant Compliance, Actual Interest Coverage Ratio + References No definition available. + Details
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Namespace Prefix: | fmc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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- Definition Covenant Compliance, Actual Leverage Ratio + References No definition available. + Details
Name: | fmc_CovenantComplianceActualLeverageRatio
Namespace Prefix: | fmc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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- Definition Covenant Terms, Maximum Leverage Ratio + References No definition available. + Details
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Namespace Prefix: | fmc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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- Definition Covenant Terms, Minimum Interest Coverage Ratio + References No definition available. + Details
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Namespace Prefix: | fmc_
Data Type: | xbrli:pureItemType
Balance Type: | na
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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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |