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Supplemental Financial Information - Other Non-Current Assets (Detail) - USD ($) $ in Millions | Jul. 27, 2018 | Apr. 27, 2018
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Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] |  |
Deferred tax assets | $ 225 | $ 229
Other assets | 239 | 221
Other non-current assets | $ 464 | $ 450

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