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Breakage occurs when a customer pays in advance of vendor performance and does not demand full performance for various reasons. 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Employee retention tax credit Employee Retention Tax Credit Per the CARES Act issued due to the Coronavirus, the Employee Retention Care Act is a refundable tax credit against certain employment taxes equal to 50 percent of the qualified wages an eligible employer pays to employees after March 12, 2020 and before January 1, 2021. Guarantor obligations, maximum exposure, undiscounted Guarantor Obligations, Maximum Exposure, Undiscounted Preferred stock, $0.01 par value, 25,000,000 shares authorized; no shares issued and outstanding as of September 27, 2020 and December 29, 2019 Preferred Stock, Value, Issued Hedging designation [Domain] Hedging Designation [Domain] Lease costs, net Lease, Cost Buildings [Member] Building [Member] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Common stock, par value per share (in USD per share) Common Stock, Par or Stated Value Per Share Other long-term liabilities Other Noncurrent Liabilities [Table Text Block] Other long-term liabilities, net Other long-term liabilities, net Other Liabilities, Noncurrent Deferred income tax assets, net Deferred Income Tax Assets, Net Other investments, net Payments for (Proceeds from) Other Investing Activities Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Inventories Inventory, Net Restaurant sales, franchise and other revenues Total revenues Revenue from Contract with Customer, Excluding Assessed Tax Fair value, measurement frequency [Domain] Measurement Frequency [Domain] Other current assets, net Other Assets, Miscellaneous, Current Labor and other related Labor and Other Related Cost of labor directly related to goods produced and services rendered. Includes, but is not limited to, payroll cost and equity-based compensation. Debt instrument, convertible, conversion ratio Debt Instrument, Convertible, Conversion Ratio Statement [Line Items] Statement [Line Items] Fixed income funds [Member] Fixed Income Funds [Member] Schedule of antidilutive securities excluded from computation of (loss) earnings per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Forecast [Member] Forecast [Member] (Loss) earnings per share attributable to common stockholders: Earnings Per Share, Basic and Diluted [Abstract] Deferred payroll tax liabilities Deferred Payroll Tax Liabilities From CARES Act The amount of deferred payroll tax liabilities permitted by the CARES Act. 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Property, plant and equipment, type [Axis] Long-Lived Tangible Asset [Axis] Amended Credit Agreement [Member] Amended Credit Agreement [Member] Amended Credit Agreement [Member] Income statement location [Axis] Income Statement Location [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Income statement location [Domain] Income Statement Location [Domain] Cash flows provided by (used in) financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Interest rate swap expense recognized in Interest expense, net Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax Accrued and other current liabilities Accrued and Other Liabilities, Current Aggregate carrying amount of accrued and other current liabilities (due within one year or within the normal operating cycle if longer). Includes costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered and of liabilities not separately disclosed. Derivative, notional amount Derivative, Notional Amount Fleming's Prime Steakhouse & Wine Bar [Member] Fleming's Prime Steakhouse & Wine Bar [Member] Fleming's Prime Steakhouse & Wine Bar [Member] Lease, cost Lease, Cost [Table Text Block] Labor and other related [Member] Labor and Other Related [Member] Cost of labor directly related to goods produced and service rendered. Includes, but is not limited to, payroll cost and equity-based compensation. 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Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Asset class [Axis] Asset Class [Axis] Change in assets and liabilities Increase (Decrease) in Operating Capital Reclassification of adjustment for loss on derivatives included in Net (loss) income, net of tax Total effects of the interest rate swaps on Net (loss) income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Adjustments to reconcile Net (loss) income to cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Other assets Other Assets, Miscellaneous, Noncurrent Interest on lease liabilities Finance Lease, Interest Expense Purchase of noncontrolling interests Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Schedule of other current assets Schedule of Other Current Assets [Table Text Block] Common stock, shares outstanding (in shares) Balance (in shares) Balance (in shares) Common Stock, Shares, Outstanding Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Convertible debt, fair value disclosures Convertible Debt, Fair Value Disclosures Variable lease cost Variable Lease, Cost Revolving credit facility [Member] Revolving Credit Facility [Member] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Other Current Assets, Net Other Current Assets [Text Block] Convertible Notes [Abstract] Convertible Notes [Abstract] Convertible Notes [Abstract] (Loss) income before (benefit) provision for income taxes (Loss) income before (benefit) provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Subsequent event [Member] Subsequent Event [Member] Property, fixtures and equipment, net [Member] Property, Plant and Equipment [Member] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Financing fees Payments of Loan Costs Property, fixtures and equipment, gross Property, Plant and Equipment, Gross Dilutive shares Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Restaurant concept [Domain] Restaurant concept [Domain] [Domain] for Restaurant concept [Axis] Bonefish Grill [Member] Bonefish Grill [Member] Bonefish Grill [Member] Restructuring plan [Domain] Restructuring Plan [Domain] Schedule of segment reporting information, by segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Fixed asset impairment Property, fixtures and equipment, impairment Impairment of Long-Lived Assets Held-for-use Guarantor obligations, nature [Axis] Guarantor Obligations, Nature [Axis] COVID-19 Impact [Abstract] COVID-19 Impact [Abstract] COVID-19 Impact [Abstract] Assets measured with impairment, quarter-to-date [Member] Assets Measured with Impairment, Quarter-to-Date [Member] Assets measured with impairment, quarter to date. 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Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Security Trading Currency Entity Listing, Security Trading Currency Other comprehensive loss, unrealized loss on derivatives arising during period, before tax Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Non-current operating lease liabilities [Member] Operating Lease, Liability, Noncurrent [Member] Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Less: unamortized debt discount and issuance costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Number of restaurant concepts in portfolio Number of Restaurant Concepts Number of restaurant concepts in the Company's portfolio. Current assets Assets, Current [Abstract] Income tax authority [Domain] Income Tax Authority [Domain] Deferred income tax assets, gross, increase (decrease), amount Deferred Income Tax Assets, Gross, Increase (Decrease), Amount Amount of increase (decrease) in the gross deferred income tax assets balance. Annualization factor, period one Annualization Factor, Period One Percentage by which the year-to-date income measure is divided to derive the annualized calculation of that measure for period one (March 28, 2021). Comprehensive (loss) income attributable to Bloomin’ Brands Comprehensive Income (Loss), Net of Tax, Attributable to Parent Blended federal and state statutory income tax rate Blended Federal and State Statutory Income Tax Rate Blended federal and state statutory income tax rate. Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Payments for partner equity plan Repayment of Partner Deposit and Accrued Buyout Contributions The cash outflow associated with partner deposits and accrued partner buyout or partner deferred compensation liabilities. 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Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Total lease liability Lease Liability Total amount of lessee's current and noncurrent operating and financing lease liabilities. Dividends declared and paid Dividends Declared [Table Text Block] Annualization factor, period two Annualization Factor, Period Two Percentage by which the year-to-date income measure is divided to derive the annualized calculation of that measure for period two (June 27, 2021). Other Assets, Net Other Assets, Noncurrent, Net [Text Block] The entire disclosure for other noncurrent assets, net. 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