Document and Entity Information - $ / shares
3 Months Ended
Mar. 31, 2019
Apr. 30, 2019
Document and Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2019  
Entity File Number 001-35625  
Entity Registrant Name Bloomin' Brands, Inc.  
Entity Incorporation, State Delaware  
Entity Tax Identification Number 208023465  
Entity Address Line One 2202 North West Shore Boulevard  
Entity Address Line Two Suite 500  
Entity Address City Tampa  
Entity Address State Florida  
Entity Address Postal Zip Code 33607  
City Area Code 813  
Local Phone Number 282-1225  
Description of Class Common  
Security Trading Currency USD  
Par Value Per Share $ 0.01  
Trading Symbol BLMN  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Common Stock, Shares Outstanding   91,705,720
Entity Central Index Key 0001546417  
Current Fiscal Year End Date --12-29  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1