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Property And Equipment (Narrative) (Details) - USD ($) $ in Millions | Nov. 30, 2021 | Aug. 31, 2021
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Machinery, Equipment And Vehicles [Member] |  |
Business Acquisition [Line Items] |  |
Capital costs | $ 13.5 | $ 30.3

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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_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Capital Costs + References No definition available. + Details
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Namespace Prefix: | wdfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=wdfc_MachineryEquipmentAndVehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |