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Segment Geographic and Significant Customer Information - Schedule of Revenues by Geographic Region (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 27, 2017 | Oct. 28, 2016 | Oct. 27, 2017 | Oct. 28, 2016
Segment Reporting Information [Line Items] |  |  |  |
Net revenues | $ 1,422 | $ 1,340 | $ 2,747 | $ 2,634
United States, Canada And Latin America (Americas) |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues | 796 | 768 | 1,522 | 1,504
Europe, Middle East And Africa (EMEA) |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues | 431 | 396 | 832 | 783
Asia Pacific (APAC) |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues | $ 195 | $ 176 | $ 393 | $ 347

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