(Loss) Earnings Per Share (Basic and Diluted EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Schedule of earnings per share, basic and diluted [Line Items]
Net (loss) income attributable to Bloomin’ Brands	$ (34,611)	$ 64,300
Redemption of preferred stock in excess of carrying value	(3,496)	0
Net (loss) income attributable to common stockholders	$ (38,107)	$ 64,300
Basic weighted average common shares outstanding	87,129	91,415
Effect of diluted securities:
Diluted weighted average common shares outstanding	87,129	92,661
Basic (loss) earnings per share attributable to common stockholders	$ (0.44)	$ 0.70
Diluted (loss) earnings per share attributable to common stockholders	$ (0.44)	$ 0.69
Stock options [Member]
Effect of diluted securities:
Dilutive shares	0	792
Nonvested restricted stock units [Member]
Effect of diluted securities:
Dilutive shares	0	358
Nonvested performance-based share units [Member]
Effect of diluted securities:
Dilutive shares	0	96