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Leases - Supplemental Balance Sheet Information Related to Operating Leases (Detail) - USD ($)
$ in Millions
Apr. 24, 2020
Apr. 26, 2019
Leases [Abstract]    
Other non-current assets $ 137 $ 0
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:OtherAssetsNoncurrent  
Accrued expenses $ 51 0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:AccruedLiabilitiesCurrent  
Other long-term liabilities $ 93 $ 0
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesNoncurrent  
Total operating lease liabilities $ 144  
Weighted Average Remaining Lease Term 3 years 10 months 24 days  
Weighted Average Discount Rate 2.70%