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Other Financial Data (Details) - Schedule of Other Financial Data Other Than Accumulated Other Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2014
Schedule of Other Financial Data Other Than Accumulated Other Comprehensive Income [Abstract]
Advertising expense	$ 127.3	$ 129.7	$ 123.4
Amortization of prepublication and production costs	26.4	30.4	32.9
Foreign currency transaction gain (loss)	(0.5)	0.1	(1.0)
Purchases related to contractual commitments for minimum print quantities	$ 0.0	$ 0.0	$ 0.0

X

- Definition

This element represents the amortization of Prepublication costs and production costs based on expected future revenues or earning of related revenues in future.

+ References

No definition available.

+ Details

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

X

- Definition

The cash outflow for purchases related to contractual commitments relating to minimum print quantities.

+ References

No definition available.

+ Details

Name:	schl_PaymentsForPurchasesRelatedToContractualCommitmentsMinimumPrintQuantities
Namespace Prefix:	schl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	schl_ScheduleOfOtherFinancialDataOtherThanAccumulatedOtherComprehensiveIncomeAbstract
Namespace Prefix:	schl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 35
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848

+ Details

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

X

- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30700-110894

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30690-110894

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