Earnings Per Share (Basic and Diluted EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended			6 Months Ended
	Jul. 01, 2018	Jun. 25, 2017		Jul. 01, 2018	Jun. 25, 2017
Schedule of earnings per share, basic and diluted [Line Items]
Net income attributable to Bloomin’ Brands	$ 26,721	$ 35,133	[1]	$ 92,119	$ 83,758	[1]
Basic weighted average common shares outstanding	92,120	98,852		92,194	100,963
Effect of diluted securities:
Diluted weighted average common shares outstanding	94,361	102,421		95,072	104,417
Basic earnings per share	$ 0.29	$ 0.36	[1]	$ 1.00	$ 0.83	[1]
Diluted earnings per share	$ 0.28	$ 0.34	[1]	$ 0.97	$ 0.80	[1]
Stock options [Member]
Effect of diluted securities:
Dilutive shares	1,861	3,128		2,406	3,030
Nonvested restricted stock and restricted stock units [Member]
Effect of diluted securities:
Dilutive shares	380	433		452	394
Nonvested performance-based share units [Member]
Effect of diluted securities:
Dilutive shares	0	8		20	30

[1] See Note 1 - Description of the Business and Basis of Presentation for details of the Net income and Earnings per share impact of implementing ASU No. 2014-09.