Goodwill and Purchased Intangible Assets, Net - Purchased Intangible Assets, Net (Detail) - USD ($) $ in Millions	Jan. 29, 2021	Apr. 24, 2020
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	$ 256	$ 196
Accumulated Amortization	(146)	(152)
Net Assets	110	44
Developed Technology
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	215	192
Accumulated Amortization	(140)	(152)
Net Assets	75	40
Customer Contracts/Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	38	4
Accumulated Amortization	(6)	0
Net Assets	32	4
Other Purchased Intangibles
Acquired Finite Lived Intangible Assets [Line Items]
Gross Assets	3	0
Accumulated Amortization	0	0
Net Assets	$ 3	$ 0