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v3.26.1

Revenue Recognition, Contracts with Customers - Shipping and Handling (Details) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2026 | Apr. 30, 2025 | Apr. 30, 2024
Revenue from Contract with Customer [Abstract] |  |  |
Shipping and handling costs | $ 23,122 | $ 23,644 | $ 25,853

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- Definition Shipping and Handling Expense + References No definition available. + Details
Name: | jwa_ShippingAndHandlingExpense
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_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration