Revenue - Summary of Disaggregation of Revenue (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jan. 29, 2021	Jan. 24, 2020	Jan. 29, 2021	Jan. 24, 2020
Disaggregation Of Revenue [Line Items]
Net revenues	$ 1,470	$ 1,404	$ 4,189	$ 4,011
Product Revenues
Disaggregation Of Revenue [Line Items]
Net revenues	775	787	2,151	2,202
Software Maintenance Revenues
Disaggregation Of Revenue [Line Items]
Net revenues	334	263	938	767
Hardware Maintenance and Other Services Revenues
Disaggregation Of Revenue [Line Items]
Net revenues	361	354	1,100	1,042
Hardware Maintenance Support Contracts
Disaggregation Of Revenue [Line Items]
Net revenues	293	293	896	863
Professional and Other Services
Disaggregation Of Revenue [Line Items]
Net revenues	$ 68	$ 61	$ 204	$ 179