Long-term Debt, Net (Summary of Required Amortization Payments) (Details) $ in Thousands	Nov. 30, 2017 USD ($)
Term loan A facility [Member]
Debt instrument [Line Items]
Quarterly required amortization payments, period one	$ 6,250
Quarterly required amortization payments, period two	9,375
Quarterly required amortization payments, period three	$ 12,500
Credit Agreement [Member] \| Secured debt [Member]
Debt instrument [Line Items]
Debt instrument, covenant, prepayment requirement, percentage of benchmark	50.00%

Percentage of the benchmark for the debt instrument covenant for required prepayments.

No definition available.

Name:	blmn_DebtInstrumentCovenantPrepaymentRequirementPercentageOfBenchmark
Namespace Prefix:	blmn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The quarterly amount of amortization payments required under the terms of the credit agreement during the first two years of amortization payments.

+ References

No definition available.

+ Details

Name:	blmn_QuarterlyRequiredAmortizationPaymentsPeriodOne
Namespace Prefix:	blmn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The quarterly amount of amortization payments required under the terms of the credit agreement during last year of amortization payments.

+ References

No definition available.

+ Details

Name:	blmn_QuarterlyRequiredAmortizationPaymentsPeriodThree
Namespace Prefix:	blmn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The quarterly amount of amortization payments required under the terms of the credit agreement during years three and four of amortization payments.

+ References

No definition available.

+ Details

Name:	blmn_QuarterlyRequiredAmortizationPaymentsPeriodTwo
Namespace Prefix:	blmn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=blmn_TermLoanAFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=blmn_CreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: