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v3.20.2

Subsequent Events (Details) - Isagro - Subsequent Event - USD ($) $ in Millions |  | 3 Months Ended
--- | --- | ---
Oct. 02, 2020 | Dec. 31, 2020
Subsequent Event [Line Items] |  |
Purchase price | $ 65 |
Forecast |  |
Subsequent Event [Line Items] |  |
Asset acquisition expense |  | $ 65

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- Definition Asset Acquisition, Consideration Transferred + References No definition available. + Details
Name: | fmc_AssetAcquisitionConsiderationTransferred
Namespace Prefix: | fmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Asset Acquisition, Research And Development Expense + References No definition available. + Details
Name: | fmc_AssetAcquisitionResearchAndDevelopmentExpense
Namespace Prefix: | fmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | fmc_AssetAcquisitionAxis=fmc_IsagroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |