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Summary of Significant Accounting Policies, Recently Issued, and Recently Adopted Accounting Standards - Schedule of Net Sales Return Reserves by Balance Sheet Account (Details) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2025 | Apr. 30, 2024
Accounting Policies [Abstract] |  |
Increase in Inventories, net | $ 4,042 | $ 7,833
Decrease in Accrued royalties | (2,067) | (3,112)
Increase in Contract liabilities | 15,093 | 25,393
Print book sales return reserve net liability balance | $ (8,984) | $ (14,448)

X
- Definition Amount of increase (decrease) in obligation related to royalties for which consideration has been received or is receivable. + References No definition available. + Details
Name: | jwa_IncreaseDecreaseInContractWithCustomerAccruedRoyalties
Namespace Prefix: | jwa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in obligation related to contract liability for which consideration has been received or is receivable. + References No definition available. + Details
Name: | jwa_IncreaseDecreaseInContractWithCustomerContractLiability
Namespace Prefix: | jwa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in right to consideration in exchange for inventory transferred to customer when right is conditioned on something other than passage of time. + References No definition available. + Details
Name: | jwa_IncreaseDecreaseInContractWithCustomerInventory
Namespace Prefix: | jwa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase (decrease) in net assets resulting from sales return reserves recorded. + References No definition available. + Details
Name: | jwa_IncreaseDecreaseInNetAssetsResultingFromSalesReturnReservesRecorded
Namespace Prefix: | jwa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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