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Income Taxes - Differences Between Income Tax Expense at Federal Income Tax Rate and Effective Income Tax Rate (Detail)
6 Months Ended
Nov. 01, 2015
Nov. 02, 2014
Income Tax Disclosure [Abstract]    
federal income tax rate 34.00% 34.00%
foreign tax rate differential (4.90%) (5.60%)
undistributed earnings from foreign subsidiaries 4.50% 3.70%
increase in liability for uncertain tax positions 3.10% 4.10%
other 0.80% 2.50%
Effective income tax rate 37.50% 38.70%