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Income Taxes - Differences Between Income Tax Expense at Federal Income Tax Rate and Effective Income Tax Rate (Detail)	3 Months Ended								12 Months Ended
	May. 03, 2015	Feb. 01, 2015	Nov. 02, 2014	Aug. 03, 2014	Apr. 27, 2014	Jan. 26, 2014	Oct. 27, 2013	Jul. 28, 2013	May. 03, 2015	Apr. 27, 2014	Apr. 28, 2013
Income Tax Disclosure [Abstract]
federal income tax rate									34.00%	34.00%	34.00%
foreign tax rate differential									(6.70%)	(7.20%)	(6.70%)
increase in the liability for uncertain tax positions									3.70%	4.30%	4.00%
undistributed earnings from foreign subsidiaries									3.00%	(26.30%)	34.60%
change in valuation allowance									(0.20%)	0.10%	(58.30%)
other									0.50%	3.50%	2.10%
effective income tax rate	26.50%	35.60%	38.60%	38.70%	33.50%	(83.20%)	35.70%	41.60%	34.30%	8.40%	9.70%

X

- Definition

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 undistributed earnings from foreign subsidiaries.

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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 domestic federal statutory tax rate applicable to pretax income (loss).

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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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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 applicable to statutory income tax expense (benefit) outside of the country of domicile.

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