Restructuring and Other Charges - Additional Information (Detail)	May 31, 2013
Restructuring Cost and Reserve [Line Items]
Redution of global work force	7.00%

Percentage of the total number of positions eliminated as of the balance sheet date since inception of the restructuring plan(s).

No definition available.

Name:	us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDatePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant