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Balance Sheet Details - Additional Information (Detail) - USD ($) $ in Millions | Oct. 26, 2018 | Jan. 26, 2018 | Oct. 27, 2017 | Sep. 08, 2017
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Property Plant And Equipment [Line Items] |  |  |  |
Sale price of assets |  |  |  | $ 306
Scenario, Forecast |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Sale of assets payments to be received | $ 96 | $ 210 |  |
Other Current Assets |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Land and buildings held for sale book value |  |  | $ 118 |

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- Definition Sale of assets payments to be received. + References No definition available. + Details
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Namespace Prefix: | ntap_
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Balance Type: | debit
Period Type: | instant

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- Definition Sale price of assets. + References No definition available. + Details
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Namespace Prefix: | ntap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of assets held-for-sale that are not part of a disposal group. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 15 -Paragraph 4 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=77912953&loc=d3e400-110220 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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- Details
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