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Product Development Assets - Schedule Of Amortization Expense For Product Development Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2025 | Apr. 30, 2024 | Apr. 30, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |  |
Amortization expense | $ 16,610 | $ 22,835 | $ 32,366

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- Definition The charge against earnings in the period representing the amortization of product development assets, which consist of composition costs and royalty advances to authors. + References No definition available. + Details
Name: | jwa_AmortizationOfProductDevelopmentAssets
Namespace Prefix: | jwa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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