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Derivatives and Hedging (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended
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Nov. 30, 2014 | Nov. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
UnrealizedLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments | $ 0.8schl_UnrealizedLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments |
Unrealized Gain On Foreign Currency Derivative Instruments, Not Designated As Hedging Instruments |  | $ 0.1schl_UnrealizedGainOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments

X
- Definition Amount of unrealized gain recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments. + References No definition available. + Details
Name: | schl_UnrealizedGainOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
Namespace Prefix: | schl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of unrealized loss recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments. + References No definition available. + Details
Name: | schl_UnrealizedLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
Namespace Prefix: | schl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration