Stock-based Compensation Plans (Unrecognized stock compensation expense and the remaining weighted-average vesting period) (Details) $ in Thousands	6 Months Ended
Jul. 01, 2018 USD ($) shares
Bloomin' Brands, Inc. 2016 Omnibus Incentive Compensation Plan [Member] \| Common stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized \| shares	4,271,424
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, nonvested awards, compensation not yet recognized, stock options	$ 11,518
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	2 years 6 months 17 days
Restricted stock units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, nonvested awards, compensation not yet recognized, share-based awards other than options	$ 19,683
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	2 years 8 months 11 days
Performance-based share units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, nonvested awards, compensation not yet recognized, share-based awards other than options	$ 9,435
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	1 year 3 months 1 day

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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