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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. 03, 2019
Oct. 28, 2018
Income Tax Disclosure [Abstract]    
U.S. federal income tax rate 21.00% 21.00%
Global Intangible Low Taxed Income Tax (GILTI) 17.30% 2.10%
Foreign income tax rate differential 10.20% 7.80%
Tax effects of Chinese foreign exchange gains 2.40% 2.80%
Change in estimate of U.S. valuation allowance 0.80% 1.20%
other (0.20%) 0.20%
Effective income tax rate 51.50% 35.10%