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Restructuring and Related Charges, Activity for Restructuring Liability (Details) $ in Thousands	12 Months Ended
	Apr. 30, 2021 USD ($)
Business Optimization Program [Member]
Activity for Restructuring Liability [Roll Forward]
Restructuring liability, beginning of period	$ 18,062
Charges (credits)	11,267
Payments	(18,572)
Foreign translation & other adjustments	708
Restructuring liability, end of period	11,465
Business Optimization Program [Member] | Severance and Termination Benefits [Member]
Activity for Restructuring Liability [Roll Forward]
Restructuring liability, beginning of period	17,632
Charges (credits)	11,531
Payments	(18,310)
Foreign translation & other adjustments	612
Restructuring liability, end of period	11,465
Business Optimization Program [Member] | Other Activities [Member]
Activity for Restructuring Liability [Roll Forward]
Restructuring liability, beginning of period	430
Charges (credits)	(264)
Payments	(262)
Foreign translation & other adjustments	96
Restructuring liability, end of period	0
Restructuring and Reinvestment Program [Member]
Activity for Restructuring Liability [Roll Forward]
Restructuring liability, beginning of period	1,590
Charges (credits)	(139)
Payments	(1,095)
Foreign translation & other adjustments	308
Restructuring liability, end of period	664
Restructuring and Reinvestment Program [Member] | Severance and Termination Benefits [Member]
Activity for Restructuring Liability [Roll Forward]
Restructuring liability, beginning of period	1,360
Charges (credits)	(139)
Payments	(888)
Foreign translation & other adjustments	69
Restructuring liability, end of period	402
Restructuring and Reinvestment Program [Member] | Other Activities [Member]
Activity for Restructuring Liability [Roll Forward]
Restructuring liability, beginning of period	230
Charges (credits)	0
Payments	(207)
Foreign translation & other adjustments	239
Restructuring liability, end of period	$ 262

X

- Definition

Restructuring charges for research and professional development, net of related reversal of severance provisions previously recorded by the Company, excluding impairment of ROU assets and property and equipment and facility charges.

+ References

No definition available.

+ Details

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Namespace Prefix:	jwa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 17
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3367-108585

+ Details

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Period Type:	duration

X

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b)(2))
-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

+ Details

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Balance Type:	credit
Period Type:	instant

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of increase (decrease) in the restructuring reserve related to foreign currency translation (gain) loss and other increases (decreases).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b)(2))
-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

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- Details

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- Details

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- Details

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- Details

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