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Supplemental Financial Information - Other Non-Current Assets (Detail) - USD ($) $ in Millions | Jan. 24, 2020 | Apr. 26, 2019
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Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] |  |
Deferred tax assets | $ 222 | $ 201
Operating lease ROU assets | 142 | 0
Other assets | 348 | 389
Other non-current assets | $ 712 | $ 590

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