Derivatives and Hedging (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
Nov. 30, 2011	Nov. 30, 2010
Unrealized Gain On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments	$ 0.8	$ 0.2

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