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Income Taxes (Details)	3 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Income Taxes [Abstract]
Effective tax rate	51.50%	23.10%
Effective tax rate excluding impact of restructuring charges (credits), impairment charge, and foreign currency transaction gains (losses)	18.10%	22.70%

X

- Definition

Percentage of effective tax rate excluding the impact of restructuring charges (credits) on entity's segment, the current year impairment charge related to one of the Company's Publishing brands and impact of foreign currency transaction gains (losses) on intercompany loans.

+ References

No definition available.

+ Details

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X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319

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- References

No definition available.

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