Income Taxes - Undistributed Earnings - Narrative (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Aug. 02, 2020	Aug. 04, 2019	May 03, 2020
Income Tax Disclosure [Abstract]
Dividends received deduction percentage for earnings and profits received from foreign corporation	100.00%	100.00%	100.00%
Dividends received deduction, foreign corporation ownership percentage	10.00%	10.00%	10.00%
Deferred tax liability, undistributed earnings from foreign subsidiaries	$ 3.6	$ 2.9	$ 3.4

Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiary and other recognized entity not within country of domicile. Includes, but is not limited to, other basis differences.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant