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Segment Geographic and Significant Customer Information - Schedule of Revenues by Geographic Region (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 26, 2018 | Jan. 27, 2017 | Jan. 26, 2018 | Jan. 27, 2017
Segment Reporting Information [Line Items] |  |  |  |
Net revenues | $ 1,523 | $ 1,404 | $ 4,270 | $ 4,038
United States, Canada And Latin America (Americas) |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues | 823 | 767 | 2,345 | 2,271
Europe, Middle East And Africa (EMEA) |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues | 487 | 460 | 1,319 | 1,243
Asia Pacific (APAC) |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues | $ 213 | $ 177 | $ 606 | $ 524

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