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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Apr. 28, 2017
Apr. 29, 2016
Apr. 24, 2015
Apr. 25, 2014
Income Tax Contingency [Line Items]        
Provision for income taxes $ 156 $ 116 $ 153  
Deferred tax assets, increase/decrease in valuation allowance $ 35      
Operating loss and credit carryforwards, expiration dates range, minimum 2018      
Operating loss and credit carryforwards, expiration dates range, maximum 2037      
Gross unrecognized tax benefits $ 218 216 272 $ 236
Unrecognized tax benefits included in other long-term liabilities 156      
Unrecognized tax benefits that would affect provision for income taxes 159      
Tax penalties and interest on unrecognized tax benefits 5 2 4  
Accrued tax penalties and interest on unrecognized tax benefits 16 11    
Resolution of income tax examinations 0 20 46  
Accumulated unremitted earnings from foreign subsidiaries 4,000      
Estimated unrecognized deferred tax liability on unremitted earnings of foreign subsidiaries 1,000      
Federal Income Tax        
Income Tax Contingency [Line Items]        
Operating loss carry forwards 8      
Tax credit carry forward amount 37      
Resolution of income tax examinations   23 47  
State and Local Income Tax        
Income Tax Contingency [Line Items]        
Operating loss carry forwards 30      
Tax credit carry forward amount 142      
Foreign Income Tax        
Income Tax Contingency [Line Items]        
Tax credit carry forward amount 22      
Accounting Standards Update 2016-09        
Income Tax Contingency [Line Items]        
Provision for income taxes 18      
SolidFire        
Income Tax Contingency [Line Items]        
Tax charge from integration of intellectual properties from the SolidFire acquisition $ 0 $ 64 $ 0