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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | Jan. 29, 2021 | Apr. 24, 2020
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Income Tax Disclosure [Abstract] |  |
Gross unrecognized tax benefits | $ 224 |
Gross unrecognized tax benefits included in other long-term liabilities | 133 | $ 136
Unrecognized tax benefits that would affect provision for income taxes | $ 133 |

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