Derivatives and Hedging (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
Feb. 29, 2012	Feb. 28, 2011
Unrealized Gain On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments	$ (0.4)	$ (1.0)

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