Commitments and Contingencies - Additional Information (Detail) - USD ($)	3 Months Ended
	Jul. 28, 2017	Jul. 29, 2016	Apr. 28, 2017
Commitments and Contingencies Disclosure [Line Items]
Future annual minimum lease payments	$ 212,000,000
Accrued purchase commitments with contract manufacturers	13,000,000		$ 10,000,000
Sale of finance receivables	31,000,000	$ 76,000,000
Legal proceedings and claims	$ 0
Management estimation of loss contingency	Although management at present believes that the ultimate outcome of these proceedings, individually and in the aggregate, will not materially harm our financial position, results of operations, cash flows, or overall trends, legal proceedings are subject to inherent uncertainties, and unfavorable rulings or other events could occur. Unfavorable resolutions could include significant monetary damages. In addition, in matters for which injunctive relief or other conduct remedies are sought, unfavorable resolutions could include an injunction or other order prohibiting us from selling one or more products at all or in particular ways or requiring other remedies. An unfavorable outcome may result in a material adverse impact on our business, results of operations, financial position, and overall trends.
Maximum
Commitments and Contingencies Disclosure [Line Items]
Terms of recourse leases	3 years
Inventory
Commitments and Contingencies Disclosure [Line Items]
Purchase orders and other commitments	$ 295,000,000
Construction Related
Commitments and Contingencies Disclosure [Line Items]
Purchase orders and other commitments	29,000,000
Other
Commitments and Contingencies Disclosure [Line Items]
Purchase orders and other commitments	$ 235,000,000