| Document and Entity Information | Jul. 31, 2019$ / shares |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 31, 2019 |
| Entity File Number | 001-35625 |
| Entity Registrant Name | Bloomin' Brands, Inc. |
| Entity Incorporation, State Code | DE |
| Entity Tax Identification Number | 20-8023465 |
| Entity Address, Address Line One | 2202 North West Shore Boulevard |
| Entity Address, Address Line Two | Suite 500 |
| Entity Address, City | Tampa |
| Entity Address, State | FL |
| Entity Address, Postal Zip Code | 33607 |
| City Area Code | 813 |
| Local Phone Number | 282-1225 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Security Trading Currency | USD |
| Title of 12(b) Security | Common Stock |
| Par Value Per Share | $ 0.01 |
| Trading Symbol | BLMN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001546417 |
