Earnings Per Share (Basic and Diluted EPS - Table) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Schedule of Earnings Per Share, Basic and Diluted [Line Items]
Net income attributable to Bloomin’ Brands	$ 28,004	$ 9,248	$ 29,021	$ 64,300	$ 10,907	$ 4,072	$ 26,721	$ 65,398	$ 130,573	$ 107,098	$ 101,293
Basic weighted average common shares outstanding									88,839	92,042	96,365
Effect of diluted securities:
Diluted weighted average common shares outstanding									89,777	94,075	99,707
Basic earnings per share	$ 0.32	$ 0.11	$ 0.32	$ 0.70	$ 0.12	$ 0.04	$ 0.29	$ 0.71	$ 1.47	$ 1.16	$ 1.05
Diluted earnings per share	$ 0.32	$ 0.11	$ 0.32	$ 0.69	$ 0.12	$ 0.04	$ 0.28	$ 0.68	$ 1.45	$ 1.14	$ 1.02
Stock options [Member]
Effect of diluted securities:
Dilutive shares									571	1,595	2,895
Nonvested restricted stock and restricted stock units [Member]
Effect of diluted securities:
Dilutive shares									295	397	421
Nonvested performance-based share units [Member]
Effect of diluted securities:
Dilutive shares									72	41	26