| Document and Entity Information Document | Sep. 03, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 3, 2020 |
| Entity Registrant Name | Designer Brands Inc. |
| Entity Incorporation, State or Country Code | OH |
| Entity File Number | 001-32545 |
| Entity Tax Identification Number | 31-0746639 |
| Entity Address, Address Line One | 810 DSW Drive |
| Entity Address, City or Town | Columbus |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 43219 |
| Local Phone Number | 237-7100 |
| City Area Code | 614 |
| Pre-commencement Tender Offer | false |
| Soliciting Material | false |
| Written Communications | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Shares, without par value |
| Trading Symbol | DBI |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001319947 |
| Amendment Flag | false |
