Leases - Supplemental Balance Sheet Information Related to Operating Leases (Detail) - USD ($) $ in Millions	Jul. 26, 2019	Apr. 26, 2019
Leases [Abstract]
Other non-current assets	$ 142	$ 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	$ 100	$ 0
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Total operating lease liabilities	$ 151
Weighted Average Remaining Lease Term	4 years
Weighted Average Discount Rate	2.70%