Document and Entity Information - USD ($) $ / shares in Units, $ in Billions	12 Months Ended
	Dec. 29, 2019	Feb. 21, 2020	Jun. 28, 2019
Document and Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Dec. 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 Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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 Public Float			$ 1.6
Entity Common Stock, Shares Outstanding		87,030,130
Entity Central Index Key	0001546417
Current Fiscal Year End Date	--12-29
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY