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Basis of Presentation (Details) - USD ($) $ in Millions | Oct. 31, 2021 | Apr. 30, 2021
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Basis of Presentation [Abstract] |  |
Intercompany receivables | $ 125.2 | $ 188.8

X
- Definition Amount of intercompany receivables. + References No definition available. + Details
Name: | jwa_IntercompanyReceivables
Namespace Prefix: | jwa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration