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Derivatives and Hedging Activities - Additional Information (Detail) - USD ($) | Apr. 27, 2018 | Apr. 28, 2017
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Foreign Exchange Forward Contracts | Cash Flow Hedging |  |
Derivative [Line Items] |  |
Forward contracts, Notional Amount | $ 0 | $ 0

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- 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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Balance Type: | na
Period Type: | instant

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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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Balance Type: | na
Period Type: | duration

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- Details
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- Details
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