3.25.1 html 181 286 1 false 56 0 false 8 false false R1.htm 0000001 - Document - Cover Page Sheet http://www.dennys.com/role/CoverPage Cover Page Cover 1 false false R2.htm 9952151 - Statement - Consolidated Balance Sheets Sheet http://www.dennys.com/role/ConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 9952152 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://www.dennys.com/role/ConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 9952153 - Statement - Consolidated Statements of Income Sheet http://www.dennys.com/role/ConsolidatedStatementsofIncome Consolidated Statements of Income Statements 4 false false R5.htm 9952154 - Statement - Consolidated Statements of Comprehensive Income (Loss) Sheet http://www.dennys.com/role/ConsolidatedStatementsofComprehensiveIncomeLoss Consolidated Statements of Comprehensive Income (Loss) Statements 5 false false R6.htm 9952155 - Statement - Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) Sheet http://www.dennys.com/role/ConsolidatedStatementsofComprehensiveIncomeLossParenthetical Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) Statements 6 false false R7.htm 9952156 - Statement - Consolidated Statements of Shareholders' Deficit Sheet http://www.dennys.com/role/ConsolidatedStatementsofShareholdersDeficit Consolidated Statements of Shareholders' Deficit Statements 7 false false R8.htm 9952157 - Statement - Consolidated Statements of Cash Flows Sheet http://www.dennys.com/role/ConsolidatedStatementsofCashFlows Consolidated Statements of Cash Flows Statements 8 false false R9.htm 9952158 - Disclosure - Introduction and Basis of Presentation Sheet http://www.dennys.com/role/IntroductionandBasisofPresentation Introduction and Basis of Presentation Notes 9 false false R10.htm 9952159 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.dennys.com/role/SummaryofSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 10 false false R11.htm 9952160 - Disclosure - Receivables Sheet http://www.dennys.com/role/Receivables Receivables Notes 11 false false R12.htm 9952161 - Disclosure - Goodwill and Intangible Assets Sheet http://www.dennys.com/role/GoodwillandIntangibleAssets Goodwill and Intangible Assets Notes 12 false false R13.htm 9952162 - Disclosure - Other Current Liabilities Sheet http://www.dennys.com/role/OtherCurrentLiabilities Other Current Liabilities Notes 13 false false R14.htm 9952163 - Disclosure - Fair Value of Financial Instruments Sheet http://www.dennys.com/role/FairValueofFinancialInstruments Fair Value of Financial Instruments Notes 14 false false R15.htm 9952164 - Disclosure - Long-Term Debt Sheet http://www.dennys.com/role/LongTermDebt Long-Term Debt Notes 15 false false R16.htm 9952165 - Disclosure - Revenues Sheet http://www.dennys.com/role/Revenues Revenues Notes 16 false false R17.htm 9952166 - Disclosure - Operating (Gains), Losses and Other Charges, Net Sheet http://www.dennys.com/role/OperatingGainsLossesandOtherChargesNet Operating (Gains), Losses and Other Charges, Net Notes 17 false false R18.htm 9952167 - Disclosure - Share-Based Compensation Sheet http://www.dennys.com/role/ShareBasedCompensation Share-Based Compensation Notes 18 false false R19.htm 9952168 - Disclosure - Income Taxes Sheet http://www.dennys.com/role/IncomeTaxes Income Taxes Notes 19 false false R20.htm 9952169 - Disclosure - Net Income Per Share Sheet http://www.dennys.com/role/NetIncomePerShare Net Income Per Share Notes 20 false false R21.htm 9952170 - Disclosure - Shareholders' Deficit Sheet http://www.dennys.com/role/ShareholdersDeficit Shareholders' Deficit Notes 21 false false R22.htm 9952171 - Disclosure - Commitments and Contingencies Sheet http://www.dennys.com/role/CommitmentsandContingencies Commitments and Contingencies Notes 22 false false R23.htm 9952172 - Disclosure - Supplemental Cash Flow Information Sheet http://www.dennys.com/role/SupplementalCashFlowInformation Supplemental Cash Flow Information Notes 23 false false R24.htm 9952173 - Disclosure - Segment Information Sheet http://www.dennys.com/role/SegmentInformation Segment Information Notes 24 false false R25.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 25 false false R26.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 26 false false R27.htm 9955511 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.dennys.com/role/SummaryofSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.dennys.com/role/SummaryofSignificantAccountingPolicies 27 false false R28.htm 9955512 - Disclosure - Receivables (Tables) Sheet http://www.dennys.com/role/ReceivablesTables Receivables (Tables) Tables http://www.dennys.com/role/Receivables 28 false false R29.htm 9955513 - Disclosure - Goodwill and Intangible Assets (Tables) Sheet http://www.dennys.com/role/GoodwillandIntangibleAssetsTables Goodwill and Intangible Assets (Tables) Tables http://www.dennys.com/role/GoodwillandIntangibleAssets 29 false false R30.htm 9955514 - Disclosure - Other Current Liabilities (Tables) Sheet http://www.dennys.com/role/OtherCurrentLiabilitiesTables Other Current Liabilities (Tables) Tables http://www.dennys.com/role/OtherCurrentLiabilities 30 false false R31.htm 9955515 - Disclosure - Fair Value of Financial Instruments (Tables) Sheet http://www.dennys.com/role/FairValueofFinancialInstrumentsTables Fair Value of Financial Instruments (Tables) Tables http://www.dennys.com/role/FairValueofFinancialInstruments 31 false false R32.htm 9955516 - Disclosure - Long-Term Debt (Tables) Sheet http://www.dennys.com/role/LongTermDebtTables Long-Term Debt (Tables) Tables http://www.dennys.com/role/LongTermDebt 32 false false R33.htm 9955517 - Disclosure - Revenues (Tables) Sheet http://www.dennys.com/role/RevenuesTables Revenues (Tables) Tables http://www.dennys.com/role/Revenues 33 false false R34.htm 9955518 - Disclosure - Operating (Gains), Losses and Other Charges, Net (Tables) Sheet http://www.dennys.com/role/OperatingGainsLossesandOtherChargesNetTables Operating (Gains), Losses and Other Charges, Net (Tables) Tables http://www.dennys.com/role/OperatingGainsLossesandOtherChargesNet 34 false false R35.htm 9955519 - Disclosure - Share-Based Compensation (Tables) Sheet http://www.dennys.com/role/ShareBasedCompensationTables Share-Based Compensation (Tables) Tables http://www.dennys.com/role/ShareBasedCompensation 35 false false R36.htm 9955520 - Disclosure - Net Income Per Share (Tables) Sheet http://www.dennys.com/role/NetIncomePerShareTables Net Income Per Share (Tables) Tables http://www.dennys.com/role/NetIncomePerShare 36 false false R37.htm 9955521 - Disclosure - Shareholders' Deficit (Tables) Sheet http://www.dennys.com/role/ShareholdersDeficitTables Shareholders' Deficit (Tables) Tables http://www.dennys.com/role/ShareholdersDeficit 37 false false R38.htm 9955522 - Disclosure - Supplemental Cash Flow Information (Tables) Sheet http://www.dennys.com/role/SupplementalCashFlowInformationTables Supplemental Cash Flow Information (Tables) Tables http://www.dennys.com/role/SupplementalCashFlowInformation 38 false false R39.htm 9955523 - Disclosure - Segment Information (Tables) Sheet http://www.dennys.com/role/SegmentInformationTables Segment Information (Tables) Tables http://www.dennys.com/role/SegmentInformation 39 false false R40.htm 9955524 - Disclosure - Introduction and Basis of Presentation (Details) Sheet http://www.dennys.com/role/IntroductionandBasisofPresentationDetails Introduction and Basis of Presentation (Details) Details http://www.dennys.com/role/IntroductionandBasisofPresentation 40 false false R41.htm 9955525 - Disclosure - Receivables - Schedule of Receivables, Net (Details) Sheet http://www.dennys.com/role/ReceivablesScheduleofReceivablesNetDetails Receivables - Schedule of Receivables, Net (Details) Details 41 false false R42.htm 9955526 - Disclosure - Goodwill and Intangible Assets - Schedule of Goodwill by Segment (Details) Sheet http://www.dennys.com/role/GoodwillandIntangibleAssetsScheduleofGoodwillbySegmentDetails Goodwill and Intangible Assets - Schedule of Goodwill by Segment (Details) Details 42 false false R43.htm 9955527 - Disclosure - Goodwill and Intangible Assets - Schedule of Finite-Lived and Indefinite-Lived Intangible Assets (Details) Sheet http://www.dennys.com/role/GoodwillandIntangibleAssetsScheduleofFiniteLivedandIndefiniteLivedIntangibleAssetsDetails Goodwill and Intangible Assets - Schedule of Finite-Lived and Indefinite-Lived Intangible Assets (Details) Details 43 false false R44.htm 9955528 - Disclosure - Goodwill and Intangible Assets - Narrative (Details) Sheet http://www.dennys.com/role/GoodwillandIntangibleAssetsNarrativeDetails Goodwill and Intangible Assets - Narrative (Details) Details 44 false false R45.htm 9955529 - Disclosure - Other Current Liabilities (Details) Sheet http://www.dennys.com/role/OtherCurrentLiabilitiesDetails Other Current Liabilities (Details) Details http://www.dennys.com/role/OtherCurrentLiabilitiesTables 45 false false R46.htm 9955530 - Disclosure - Fair Value of Financial Instruments - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Sheet http://www.dennys.com/role/FairValueofFinancialInstrumentsScheduleofFinancialAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails Fair Value of Financial Instruments - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Details 46 false false R47.htm 9955531 - Disclosure - Fair Value of Financial Instruments - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Non - Recurring Basis (Details) Sheet http://www.dennys.com/role/FairValueofFinancialInstrumentsScheduleofFinancialAssetsandLiabilitiesMeasuredatFairValueonaNonRecurringBasisDetails Fair Value of Financial Instruments - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Non - Recurring Basis (Details) Details 47 false false R48.htm 9955532 - Disclosure - Fair Value of Financial Instruments - Narrative (Details) Sheet http://www.dennys.com/role/FairValueofFinancialInstrumentsNarrativeDetails Fair Value of Financial Instruments - Narrative (Details) Details 48 false false R49.htm 9955533 - Disclosure - Long-Term Debt - Narrative (Details) Sheet http://www.dennys.com/role/LongTermDebtNarrativeDetails Long-Term Debt - Narrative (Details) Details 49 false false R50.htm 9955534 - Disclosure - Long-Term Debt - Schedule of Interest Rate Swaps (Details) Sheet http://www.dennys.com/role/LongTermDebtScheduleofInterestRateSwapsDetails Long-Term Debt - Schedule of Interest Rate Swaps (Details) Details 50 false false R51.htm 9955535 - Disclosure - Revenues - Schedule of Disaggregation of Revenue (Details) Sheet http://www.dennys.com/role/RevenuesScheduleofDisaggregationofRevenueDetails Revenues - Schedule of Disaggregation of Revenue (Details) Details 51 false false R52.htm 9955536 - Disclosure - Revenues - Schedule of Components of Lease Income (Details) Sheet http://www.dennys.com/role/RevenuesScheduleofComponentsofLeaseIncomeDetails Revenues - Schedule of Components of Lease Income (Details) Details 52 false false R53.htm 9955537 - Disclosure - Revenues - Schedule of Components of the Change in Deferred Franchise Revenue (Details) Sheet http://www.dennys.com/role/RevenuesScheduleofComponentsoftheChangeinDeferredFranchiseRevenueDetails Revenues - Schedule of Components of the Change in Deferred Franchise Revenue (Details) Details 53 false false R54.htm 9955538 - Disclosure - Revenues - Schedule of Change In Contract Assets (Details) Sheet http://www.dennys.com/role/RevenuesScheduleofChangeInContractAssetsDetails Revenues - Schedule of Change In Contract Assets (Details) Details 54 false false R55.htm 9955539 - Disclosure - Revenues - Narrative (Details) Sheet http://www.dennys.com/role/RevenuesNarrativeDetails Revenues - Narrative (Details) Details 55 false false R56.htm 9955540 - Disclosure - Revenues - Schedule of Deferred Revenue (Details) Sheet http://www.dennys.com/role/RevenuesScheduleofDeferredRevenueDetails Revenues - Schedule of Deferred Revenue (Details) Details 56 false false R57.htm 9955541 - Disclosure - Operating (Gains), Losses and Other Charges, Net - Schedule of Operating Gains Losses and Other Charges, Net (Details) Sheet http://www.dennys.com/role/OperatingGainsLossesandOtherChargesNetScheduleofOperatingGainsLossesandOtherChargesNetDetails Operating (Gains), Losses and Other Charges, Net - Schedule of Operating Gains Losses and Other Charges, Net (Details) Details http://www.dennys.com/role/OperatingGainsLossesandOtherChargesNetTables 57 false false R58.htm 9955542 - Disclosure - Operating (Gains), Losses and Other Charges, Net - Narrative (Details) Sheet http://www.dennys.com/role/OperatingGainsLossesandOtherChargesNetNarrativeDetails Operating (Gains), Losses and Other Charges, Net - Narrative (Details) Details http://www.dennys.com/role/OperatingGainsLossesandOtherChargesNetTables 58 false false R59.htm 9955543 - Disclosure - Operating (Gains), Losses and Other Charges, Net - Schedule of Restructuring Charges and Exit Costs (Details) Sheet http://www.dennys.com/role/OperatingGainsLossesandOtherChargesNetScheduleofRestructuringChargesandExitCostsDetails Operating (Gains), Losses and Other Charges, Net - Schedule of Restructuring Charges and Exit Costs (Details) Details http://www.dennys.com/role/OperatingGainsLossesandOtherChargesNetTables 59 false false R60.htm 9955544 - Disclosure - Share-Based Compensation - Schedule of Total Share-based Compensation (Details) Sheet http://www.dennys.com/role/ShareBasedCompensationScheduleofTotalSharebasedCompensationDetails Share-Based Compensation - Schedule of Total Share-based Compensation (Details) Details 60 false false R61.htm 9955545 - Disclosure - Share-Based Compensation - Narrative (Details) Sheet http://www.dennys.com/role/ShareBasedCompensationNarrativeDetails Share-Based Compensation - Narrative (Details) Details 61 false false R62.htm 9955546 - Disclosure - Income Taxes (Details) Sheet http://www.dennys.com/role/IncomeTaxesDetails Income Taxes (Details) Details http://www.dennys.com/role/IncomeTaxes 62 false false R63.htm 9955547 - Disclosure - Net Income Per Share (Details) Sheet http://www.dennys.com/role/NetIncomePerShareDetails Net Income Per Share (Details) Details http://www.dennys.com/role/NetIncomePerShareTables 63 false false R64.htm 9955548 - Disclosure - Shareholders' Deficit - Narrative (Details) Sheet http://www.dennys.com/role/ShareholdersDeficitNarrativeDetails Shareholders' Deficit - Narrative (Details) Details 64 false false R65.htm 9955549 - Disclosure - Shareholders' Deficit - Schedule of Components of Accumulated Other Comprehensive Income (Loss) (Details) Sheet http://www.dennys.com/role/ShareholdersDeficitScheduleofComponentsofAccumulatedOtherComprehensiveIncomeLossDetails Shareholders' Deficit - Schedule of Components of Accumulated Other Comprehensive Income (Loss) (Details) Details 65 false false R66.htm 9955550 - Disclosure - Supplemental Cash Flow Information (Details) Sheet http://www.dennys.com/role/SupplementalCashFlowInformationDetails Supplemental Cash Flow Information (Details) Details http://www.dennys.com/role/SupplementalCashFlowInformationTables 66 false false R67.htm 9955551 - Disclosure - Segment Information (Details) Sheet http://www.dennys.com/role/SegmentInformationDetails Segment Information (Details) Details http://www.dennys.com/role/SegmentInformationTables 67 false false All Reports Book All Reports denn-20250326.htm denn-20250326.xsd denn-20250326_cal.xml denn-20250326_def.xml denn-20250326_lab.xml denn-20250326_pre.xml denn-20250326_g1.gif http://fasb.org/srt/2024 http://fasb.org/us-gaap/2024 http://xbrl.sec.gov/dei/2024 http://xbrl.sec.gov/ecd/2024 true true