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Income Taxes - Differences Between Income Tax Expense at Federal Income Tax Rate and Effective Income Tax Rate (Detail)	9 Months Ended
	Feb. 02, 2020	Jan. 27, 2019
Income Tax Disclosure [Abstract]
U.S. federal income tax rate	21.00%	21.00%
Global Intangible Low Taxed Income Tax (GILTI)	58.20%	2.60%
Foreign income tax rate differential	35.70%	10.10%
Non-controlling interest income attributable to a consolidated partnership	21.00%
Tax effects of Chinese foreign exchange gains	4.40%	1.40%
Change in estimate of U.S. valuation allowance	2.50%	1.00%
Stock-based compensation	1.20%	0.70%
Tax effects of the 2017 Tax Cuts and Jobs Act		(5.70%)
Other	(1.20%)	1.40%
Effective income tax rate	142.80%	32.50%

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign exchange gain or loss.

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Effective income tax rate reconciliation tax cuts and jobs act of 2017

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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