Document and Entity Information - $ / shares
9 Months Ended
Sep. 29, 2019
Nov. 04, 2019
Document and Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Period End Date Sep. 29, 2019  
Document Transition Report false  
Entity File Number 001-35625  
Entity Registrant Name Bloomin' Brands, Inc.  
Entity Incorporation, State DE  
Entity Tax Identification Number 20-8023465  
Entity Address Line One 2202 North West Shore Boulevard  
Entity 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  
Title of 12(b) Security Common Stock  
Security Trading Currency USD  
Par Value Per Share $ 0.01  
Trading Symbol BLMN  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Reporting Company false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   86,865,175
Entity Central Index Key 0001546417  
Current Fiscal Year End Date --12-29  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3