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Purchased Intangible Assets, Net - Purchased Intangible Assets, Net (Detail) - USD ($) $ in Millions | Jul. 27, 2018 | Apr. 27, 2018
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Acquired Finite Lived Intangible Assets [Line Items] |  |
Gross Assets | $ 201 | $ 216
Accumulated Amortization | (120) | (122)
Net Assets | 81 | 94
Developed Technology |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Gross Assets | 160 | 164
Accumulated Amortization | (86) | (80)
Net Assets | 74 | 84
Customer Contracts/Relationships |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Gross Assets | 41 | 43
Accumulated Amortization | (34) | (33)
Net Assets | 7 | 10
Other Purchased Intangibles |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Gross Assets | 0 | 9
Accumulated Amortization | 0 | (9)
Net Assets | $ 0 | $ 0

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