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Segment Geographic and Significant Customer Information - Schedule of Financial Information by Segment (Parenthetical) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 29, 2021 | Oct. 30, 2020 | Oct. 29, 2021 | Oct. 30, 2020
Segment Reporting [Abstract] |  |  |  |
Unallocated cost of revenue stock-based compensation expense | $ 4 | $ 3 | $ 8 | $ 7
Unallocated cost of revenue amortization of intangible assets | $ 7 | $ 12 | $ 14 | $ 22

X
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Period Type: | duration

X
- Definition Unallocated cost of revenue stock-based compensation expense. + References No definition available. + Details
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Namespace Prefix: | ntap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration