XML 59 R43.htm IDEA: XBRL DOCUMENT
v3.21.2

Basis of Presentation (Details) - USD ($) $ in Millions | Jul. 31, 2021 | Apr. 30, 2021
--- | --- | ---
Basis of Presentation [Abstract] |  |
Intercompany receivables | $ 189.1 | $ 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

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