| Document and Entity Information | Jun. 03, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | JOANN Inc. |
| Amendment Flag | false |
| Entity Central Index Key | 0001834585 |
| Document Type | 8-K |
| Document Period End Date | Jun. 3, 2021 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-40204 |
| Entity Tax Identification Number | 46-1095540 |
| Entity Address Address Line1 | 5555 Darrow Road |
| Entity Address City Or Town | Hudson |
| Entity Address State Or Province | OH |
| Entity Address Postal Zip Code | 44236 |
| City Area Code | (330) |
| Local Phone Number | 656-2600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Security12b Title | Common stock, par value $0.01 per share |
| Trading Symbol | JOAN |
| Security Exchange Name | NASDAQ |
