Leases - Supplemental Balance Sheet Information Related to Operating Leases (Detail) - USD ($) $ in Millions	Jul. 31, 2020	Apr. 24, 2020
Leases [Abstract]
Other non-current assets	$ 135	$ 137
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Accrued expenses	$ 52	$ 51
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesCurrent	us-gaap:AccruedLiabilitiesCurrent
Other long-term liabilities	$ 90	$ 93
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent
Total operating lease liabilities	$ 142	$ 144
Weighted Average Remaining Lease Term	3 years 8 months 12 days	3 years 10 months 24 days
Weighted Average Discount Rate	2.70%	2.70%