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Foreign Currency Forward Contracts Outstanding with Notional Values (Detail) - Foreign Exchange Contract - USD ($)
May. 01, 2016
May. 03, 2015
Derivatives designated as hedging instruments | Cash Flow Hedging    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Exchange of foreign currency contracts $ 27,150,000 $ 20,400,000
Not Designated as Hedging Instrument    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Exchange of foreign currency contracts $ 43,000,000 $ 26,000,000