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Foreign Currency Forward Contracts Outstanding with Notional Values (Detail) - Foreign Exchange Contract - USD ($)	Apr. 30, 2017	May 01, 2016
Derivatives Designated as Hedging Instruments | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Exchange of foreign currency contracts	$ 19,200,000	$ 27,150,000
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Exchange of foreign currency contracts	$ 48,000,000	$ 43,000,000

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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- Details

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