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Supplemental Financial Information - Product Warranty Liabilities (Detail) - USD ($)
$ in Millions
12 Months Ended
Apr. 30, 2021
Apr. 24, 2020
Apr. 26, 2019
Movement In Standard Product Warranty Accrual [Roll Forward]      
Balance at beginning of period $ 41 $ 40 $ 40
Expense accrued during the period 13 26 22
Warranty costs incurred (22) (25) (22)
Balance at end of period 32 41 40
Standard Product Warranty Accrual, Balance Sheet Classification [Abstract]      
Accrued expenses 21 26  
Other long-term liabilities 11 15  
Total warranty liabilities $ 32 $ 41 $ 40