XML 56 R45.htm IDEA: XBRL DOCUMENT v3.10.0.1

Accumulated Other Comprehensive Loss, Reclassification out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		3 Months Ended
		Jul. 31, 2018	Jul. 31, 2017
Amortization from Accumulated Other Comprehensive Loss [Abstract]
Operating and administrative expenses	[1]	$ 253,773	$ 245,738
Unamortized Retirement Costs [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Amortization from Accumulated Other Comprehensive Loss [Abstract]
Operating and administrative expenses		$ 1,400	$ 1,400
[1] Due to the retrospective adoption of ASU 2017-07, total net benefits of $1.9 million related to defined benefit and other post-employment benefit plans were reclassified from Operating and Administrative Expenses to Interest and Other Income for the three months ended July 31, 2017. Total net benefits were $2.4 million for the three months ended July 31, 2018. Refer to Note 2, "Recent Accounting Standards," in the Notes to Condensed Consolidated Financial Statements for more information.

X

- References

No definition available.

+ Details

Name:	jwa_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLossAbstract
Namespace Prefix:	jwa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

+ References

No definition available.

+ Details

Name:	us-gaap_OperatingExpenses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis=us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: