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Income Taxes - Uncertainty in Income Taxes - Narrative (Detail) (USD $)
Aug. 03, 2014
Apr. 27, 2014
Jul. 28, 2013
Income Taxes [Line Items]      
Unrecognized tax benefits $ 14,000,000 $ 13,700,000 $ 13,300,000
Unrecognized tax benefits that would favorably impact effective income tax rate if recognized 4,000,000 4,000,000 4,200,000
Expected increase in unrecognized tax benefits related to double taxation under applicable tax treaties with foreign tax jurisdictions 802,000    
Net Non-current Deferred Income Taxes [Member]
     
Income Taxes [Line Items]      
Unrecognized tax benefits 10,000,000 9,700,000 9,100,000
Income Taxes Payable - Long-Term [Member]
     
Income Taxes [Line Items]      
Unrecognized tax benefits $ 4,000,000 $ 4,000,000 $ 4,200,000