Document and Entity Information - USD ($)
$ in Billions
12 Months Ended
Dec. 30, 2018
Feb. 22, 2019
Jun. 29, 2018
Document and Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 30, 2018    
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 Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 1.8
Entity Common Stock, Shares Outstanding   91,399,452  
Entity Central Index Key 0001546417    
Current Fiscal Year End Date --12-30    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY