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v3.10.0.1

Revenue - Summary of Activity Related to the Balances in Condensed Consolidated Balance Sheets (Detail) - USD ($) $ in Millions | Oct. 26, 2018 | Apr. 27, 2018 | Oct. 27, 2017 | Apr. 28, 2017
--- | --- | --- | --- | ---
Deferred Revenue And Credits [Line Items] |  |  |  |
Total deferred commissions | $ 131 | $ 137 | $ 115 | $ 113
Other Current Assets |  |  |  |
Deferred Revenue And Credits [Line Items] |  |  |  |
Total deferred commissions | 61 | 66 |  |
Other Noncurrent Assets |  |  |  |
Deferred Revenue And Credits [Line Items] |  |  |  |
Total deferred commissions | $ 70 | $ 71 |  |

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- Definition Deferred revenue and credits. + References No definition available. + Details
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Namespace Prefix: | ntap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |