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Commitments and Contingencies - Additional Information (Detail) - USD ($)
 12 Months Ended
Apr. 27, 2018
Apr. 28, 2017
Apr. 29, 2016
Commitments and Contingencies Disclosure [Line Items]      
Rent expense $ 59,000,000 $ 64,000,000 $ 69,000,000
Accrued purchase commitments with contract manufacturers 14,000,000 10,000,000  
Sale of finance receivables 67,000,000 $ 183,000,000 $ 243,000,000
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 $ 374,000,000    
Construction Related      
Commitments and Contingencies Disclosure [Line Items]      
Purchase orders and other commitments 7,000,000    
Other      
Commitments and Contingencies Disclosure [Line Items]      
Purchase orders and other commitments $ 193,000,000