| Cover Document | Nov. 03, 2020 |
| Cover Page [Abstract] | |
| Pre-commencement Issuer Tender Offer | false |
| Pre-commencement Tender Offer | false |
| Soliciting Material | false |
| Written Communications | false |
| Title of 12(b) Security | Class A Common Stock $0.0001 par value per share |
| Entity Incorporation, State or Country Code | DE |
| Document Type | 8-K |
| Document Period End Date | Nov. 3, 2020 |
| Entity Registrant Name | Pure Storage, Inc. |
| Entity File Number | 001-37570 |
| Entity Tax Identification Number | 27-1069557 |
| Entity Address, Address Line One | 650 Castro Street, Suite 400 |
| Entity Address, City or Town | Mountain View |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94041 |
| City Area Code | 800 |
| Local Phone Number | 379-7873 |
| Trading Symbol | PSTG |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001474432 |
| Amendment Flag | false |
| Cover Non-Printing | Nov. 03, 2020 |
| Cover Page [Abstract] | |
| Entity Central Index Key | 0001474432 |
| Amendment Flag | false |
