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Segment Reporting (Reportable Segments) (Details)	Sep. 28, 2025 market
Segment Reporting [Abstract]
Franchised country count	12

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- Definition

Count of markets that have franchised restaurants.

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration