| Document And Entity Information | Jan. 28, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | SALLY BEAUTY HOLDINGS, INC. |
| Document Type | 8-K |
| Amendment Flag | false |
| Entity Central Index Key | 0001368458 |
| Entity Emerging Growth Company | false |
| Document Period End Date | Jan. 28, 2021 |
| Entity File Number | 1-33145 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 36-2257936 |
| Entity Address, Address Line One | 3001 Colorado Boulevard |
| Entity Address, City or Town | Denton |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 76210 |
| City Area Code | 940 |
| Local Phone Number | 898-7500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.01 par value |
| Trading Symbol | SBH |
| Security Exchange Name | NYSE |
