| Document And Entity Information | Feb. 12, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 8, 2020 |
| Entity Registrant Name | NetApp, Inc. |
| Entity Central Index Key | 0001002047 |
| Entity Emerging Growth Company | false |
| Entity File Number | 0-27130 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 77-0307520 |
| Entity Address, Address Line One | 1395 Crossman Avenue |
| Entity Address, City or Town | Sunnyvale |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94089 |
| City Area Code | 408 |
| Local Phone Number | 822-6000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of each class | Common Stock, $0.001 Par Value |
| Trading Symbol(s) | NTAP |
| Security Exchange Name | NASDAQ |
