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Balance Sheet Details - Other Current Assets (Detail) - USD ($) $ in Millions | Jan. 29, 2016 | Apr. 24, 2015
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Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] |  |
Prepaid expenses and other current assets | $ 354 | $ 268
Deferred tax assets | 0 | 254
Other current assets | $ 354 | $ 522

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