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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Apr. 30, 2021
Apr. 24, 2020
Apr. 26, 2019
Apr. 27, 2018
Income Tax Contingency [Line Items]        
Deferred tax assets, increase in valuation allowance $ 3      
Operating loss and credit carryforwards, expiration dates range, minimum 2022      
Operating loss and credit carryforwards, expiration dates range, maximum 2035      
Gross unrecognized tax benefits $ 221 $ 211 $ 296 $ 348
Gross unrecognized tax benefits included in other long-term liabilities 127 136    
Unrecognized tax benefits that would affect provision for income taxes 126      
Tax penalties and interest on unrecognized tax benefits 1 8 $ 4  
Accrued tax penalties and interest on unrecognized tax benefits 11 $ 10    
Federal Income Tax        
Income Tax Contingency [Line Items]        
Operating loss carry forwards 6      
Tax credit carry forward amount 1      
State and Local Income Tax        
Income Tax Contingency [Line Items]        
Operating loss carry forwards 23      
Tax credit carry forward amount 130      
Foreign Income Tax        
Income Tax Contingency [Line Items]        
Operating loss carry forwards 1      
Tax credit carry forward amount $ 28