Derivatives and Hedging (Detail) (USD $) In Millions	3 Months Ended
Aug. 31, 2011	Aug. 31, 2010
Unrealized Gain On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments	$ 0.1	$ 1.0

Name:

schl_UnrealizedGainOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments

Namespace Prefix:

schl

Data Type:

xbrli:monetaryItemType

Balance Type:

credit

Period Type:

duration