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Business Combinations - Additional Information (Detail) (Fiscal 2015 Acquisitions, USD $) In Millions, unless otherwise specified | 0 Months Ended
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Oct. 27, 2014
SteelStore Product Line |
Business Acquisition [Line Items] |
Business acquisition cash paid | $ 79.1 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ntap_Fiscal2015AcquisitionsMember / dei_LegalEntityAxis = ntap_SteelStoreProductLineMember
Privately Held Software Developer |
Business Acquisition [Line Items] |
Business acquisition cash paid | $ 5.5 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ntap_Fiscal2015AcquisitionsMember / dei_LegalEntityAxis = ntap_PrivatelyHeldSoftwareDeveloperMember

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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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