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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended |
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Jul. 31, 2020 | Apr. 24, 2020
Income Tax Disclosure [Abstract] |  |
Effective tax rate excluding acquisition integration-related taxes | 16.00% |
Gross unrecognized tax benefits | $ 220 |
Gross unrecognized tax benefits included in other long-term liabilities | 142 | $ 136
Unrecognized tax benefits that would affect provision for income taxes | $ 142 |

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