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Effect of Interest Rate and Foreign Currency Contracts on Consolidated Statements of Income (Detail) (Other income (expense), net, USD $)	12 Months Ended
	Apr. 28, 2012	Apr. 30, 2011	Apr. 24, 2010
Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Other income (expense), net	$ 0	$ (100)	$ (900)
Foreign Currency Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Other income (expense), net	$ 0	$ (1,900)	$ 0

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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