Derivatives and Hedging (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
May 31, 2013	May 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Unrealized Gain On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments	$ 0.5	$ 0.5

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.

No definition available.

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