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Revenue Recognition, Contracts with Customers - Remaining Performance Obligations included in Contract Liability (Details) - USD ($) $ in Millions	Jul. 31, 2023	Apr. 30, 2023
Revenue, Performance Obligation Satisfied over Time [Abstract]
Remaining performance obligation to be recognized	$ 388.6
Sales return reserve recorded in contract liability	26.0	$ 24.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-08-01
Revenue, Performance Obligation Satisfied over Time [Abstract]
Remaining performance obligations excluding sales return reserve	$ 343.6
Remaining performance obligation, expected timing of satisfaction	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-08-01
Revenue, Performance Obligation Satisfied over Time [Abstract]
Remaining performance obligation to be recognized	$ 19.0
Remaining performance obligation, expected timing of satisfaction

X

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue excluding sales return reserve.

+ References

No definition available.

+ Details

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Namespace Prefix:	jwa_
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Balance Type:	credit
Period Type:	instant

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- Definition

Amount of liability for consideration received or receivable from customer which is not included in transaction price, when consideration is expected to be refunded to customer, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 27
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479777/606-10-55-27

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- References

No definition available.

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- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-13

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

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- Definition

Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-13

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