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Summary of Significant Accounting Policies (Insurance Reserves) (Details) - Workers' compensation and general liability	12 Months Ended
	Dec. 29, 2024
Minimum
Insurance [Line Items]
Insurance, annual risk free rate, period	1 year
Maximum
Insurance [Line Items]
Insurance, annual risk free rate, period	5 years

X

- Definition

The period of the annual risk free rate of monetary assets that have comparable maturities, used as the discount rate in calculating reserves for unresolved insurance claims and estimates of incurred but not reported claims.

+ References

No definition available.

+ Details

Name:	blmn_InsuranceAnnualRiskFreeRatePeriod
Namespace Prefix:	blmn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

[Line Items] for Insurance [Table]

+ References

No definition available.

+ Details

Name:	blmn_InsuranceLineItems
Namespace Prefix:	blmn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	blmn_InsurancePolicyTypeAxis=blmn_WorkersCompensationAndGeneralLiabilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: