Description of Business (Details)	Dec. 29, 2019 restraurant_concept
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of restaurant concepts in portfolio	4

Number of restaurant concepts in the Company's portfolio.

No definition available.

Name:	blmn_NumberOfRestaurantConcepts
Namespace Prefix:	blmn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant