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Stockholders' Equity - Stock-Based Compensation Expense (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 29, 2021 | Oct. 30, 2020 | Oct. 29, 2021 | Oct. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | $ 62 | $ 49 | $ 115 | $ 103
Income tax benefit for stock-based compensation expense | 4 | 8 | 9 | 12
Cost of Product Revenues |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | 1 | 1 | 2 | 2
Cost of Services Revenues |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | 4 | 2 | 6 | 5
Sales and Marketing |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | 29 | 24 | 55 | 49
Research and Development |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | 18 | 15 | 34 | 34
General and Administrative |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock-based compensation expense | $ 10 | $ 7 | $ 18 | $ 13

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