Revenue - Summary of Disaggregation of Revenue (Detail) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2021	Apr. 24, 2020	Apr. 26, 2019
Disaggregation Of Revenue [Line Items]
Net revenues	$ 5,744	$ 5,412	$ 6,146
Product Revenues
Disaggregation Of Revenue [Line Items]
Net revenues	2,991	2,995	3,755
Software Support Revenues
Disaggregation Of Revenue [Line Items]
Net revenues	1,281	1,034	946
Hardware Support and Other Services Revenues
Disaggregation Of Revenue [Line Items]
Net revenues	1,472	1,383	1,445
Hardware Support Contracts
Disaggregation Of Revenue [Line Items]
Net revenues	1,195	1,142	1,182
Professional and Other Services
Disaggregation Of Revenue [Line Items]
Net revenues	$ 277	$ 241	$ 263