Document and Entity Information - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2017
Feb. 23, 2018
Jun. 25, 2017
Document and Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2017    
Entity Registrant Name Bloomin' Brands, Inc.    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 1.9
Entity Common Stock, Shares Outstanding   92,581,406  
Entity Central Index Key 0001546417    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY