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v3.19.1

Commitments and Contingencies (Narrative) (Details) | 6 Months Ended
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Mar. 31, 2019
Officer [Member] |
Loss Contingencies [Line Items] |
Period in which payments of termination benefits required for employment terminated following change of control | 2 years

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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
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Period In Which Payments Of Termination Benefits Required For Employment Terminated Following Change of Control + References No definition available. + Details
Name: | wwd_PeriodInWhichPaymentsOfTerminationBenefitsRequiredForEmploymentTerminatedFollowingChangeOfControl
Namespace Prefix: | wwd_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_OfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |