Document And Entity Information Statistical Measurement [Axis] Note To Financial Statement Details Textual Significant Accounting Policies Note 1 - Summary of Significant Accounting Policies us-gaap_IncomeTaxExpenseBenefit Income tax provision ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Note 2 - Property and Equipment, Net ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Note 3 - Goodwill and Intangible Assets, Net Dividends, amount per share (in dollars per share) Trading Arrangements, by Individual [Table] Note 4 - Accrued Liabilities Material Terms of Trading Arrangement [Text Block] Note 5 - Long-term Debt Note 7 - Stockholders' Equity and Stock Incentive Plans Note 8 - Fair Value Measurements us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation (in shares) Note 9 - Segment Information Note 1 - Summary of Significant Accounting Policies - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) Minimum [Member] Note 1 - Summary of Significant Accounting Policies - Schedule of Promotional Allowances (Details) Product and Service, Other [Member] Note 2 - Property and Equipment, Net - Schedule of Property and Equipment (Details) Statistical Measurement [Domain] Dividends Payable [Table] Note 2 - Property and Equipment, Net - Depreciation Expense (Details) Goodwill, gross Maximum [Member] Note 3 - Goodwill and Intangible Assets, Net - Schedule of Intangible Assets (Details) us-gaap_GoodwillImpairedAccumulatedImpairmentLoss Goodwill, cumulative impairment losses Note 3 - Goodwill and Intangible Assets, Net - Future Amortization (Details) Note 3 - Goodwill and Intangible Assets, Net - Goodwill (Details) Note 4 - Accrued Liabilities - Schedule of Accrued Liabilities (Details) Note 4 - Accrued Liabilities - Schedule of Accrued Liabilities (Details) (Parentheticals) us-gaap_IncreaseDecreaseInAccountsReceivable Accounts receivable, net Note 5 - Long-term Debt - Schedule of Long-term Debt (Details) Note 5 - Long-term Debt - Outstanding Principal Amounts (Details) Accounts payable and accrued liabilities us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities Note 7 - Stockholders' Equity and Stock Incentive Plans - Share Repurchases (Details) Note 7 - Stockholders' Equity and Stock Incentive Plans - Dividends (Details) Note 7 - Stockholders' Equity and Stock Incentive Plans - Classification of Total Costs (Details) Note 8 - Fair Value Measurements - Fair Value of Financial Instruments (Details) Note 8 - Fair Value Measurements - Changes in Fair Value of Level 3 Assets and Liabilities (Details) Note 8 - Fair Value Measurements - Minimum Assessment Agreements (Details) Note 8 - Fair Value Measurements - Long-term Debt (Details) Note 9 - Segment Information - Revenues for Reportable Segments (Details) Note 9 - Segment Information - Reconciliation of Total Reportable Segment Adjusted EBITDAR to Operating Income (Details) Note 9 - Segment Information - Reconciliation of Total Reportable EBITDAR Revenue By Segment (Details) Note 9 - Segment Information - Assets By Reportable Segment (Details) Notes To Financial Statements Notes To Financial Statements [Abstract] us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent Debt Securities, Available-for-Sale, Current Business to Business Relationships [Member] Relating to Business to Business (B2B) relationships. Business to Consumer Relationship [Member] Relating to business to consumer (B2C) relationships. Total cost, including brokerage fees Value of stock repurchased and retire during period excludes exercise tax. Performance Shares [Member] Land [Member] us-gaap_DividendsCash Dividends declared us-gaap_IncreaseDecreaseInIncomeTaxesReceivable Income taxes (receivable) payable, net Weighted Average [Member] us-gaap_IncreaseDecreaseInInventories Inventories Online Reimbusements [Member] Related to online reimbursements. Letter of Credit [Member] byd_GoodwillAccumulatedAmortization Goodwill, cumulative amortization The amount of accumulated amortization of goodwill. byd_LineOfCreditFacilityAdditionalAvailableBorrowingCapacity Line of Credit Facility, Additional Available Borrowing Capacity The additional available borrowing capacity of a line of credit facility. Dividends [Axis] Segment Reporting [Text Block] Dividends [Domain] byd_LineOfCreditFacilityCovenantTermsMaximumSecuredLeverageRatioAllowed Line of Credit Facility Covenant Terms, Maximum Secured Leverage Ratio Allowed The maximum secured leverage ratio allowed under line of credit facility covenant terms. Award Type [Axis] Preferred stock, $0.01 par value, 5,000,000 shares authorized Adjustments to reconcile net income to net cash provided by operating activities: Plan Name [Axis] Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] byd_DebtInstrumentFixedQuarterlyAmortizationOfPrincipalPercentage Debt Instrument, Fixed Quarterly Amortization of Principal Percentage the percent of fixed quarterly amortization of a debt instrument. Plan Name [Domain] Segment Reporting, Reconciliation of Revenue by Segment to Consolidated [Table Text Block] Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block] The 4.750% Senior NotesDue December 2027 [Member] Related to debt. us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and stockholders' equity Share-based compensation expense Consolidation Items [Axis] Cash and Cash Equivalent [Table] Segment Reporting [Table] us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets Prepaid expenses and other current assets byd_LineOfCreditFacilityCovenantTermsMaximumTotalLeverageRatioAllowed Line of Credit Facility, Covenant Terms, Maximum Total Leverage Ratio Allowed The maximum total leverage ratio allowed under the covenant terms of the line of credit facility. Share-based compensation expense us-gaap_ShareBasedCompensation Share-based compensation expense Selling, general and administrative Consolidation Items [Domain] Senior Notes [Member] Changes in operating assets and liabilities, excluding the impact of acquisitions: us-gaap_FiniteLivedIntangibleAssetUsefulLife Intangible assets, weighted average life remaining (Year) us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife Intangible Asset, Finite-Lived, Acquired, Weighted-Average Amortization Period (Year) Online Market Access Agreements [Policy Text Block] The accounting disclosure for online market access agreements. byd_PolicyTable Preferred stock, shares authorized (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares) Portion at Fair Value Measurement [Member] Reported Value Measurement [Member] us-gaap_TaxesOther Taxes, Other Fair Value, by Balance Sheet Grouping [Table] Preferred stock, par value (in dollars per share) us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect Change in cash, cash equivalents and restricted cash Development Agreement [Member] Related to the development agreement. us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents Total cash, cash equivalents and restricted cash Effect of foreign currency exchange rates on cash, cash equivalents and restricted cash Master Lease for Pinnacle Purchase Agreement [Member] Related to the master lease for pinnacle purchase agreement. us-gaap_CashAndCashEquivalentsFairValueDisclosure Cash and cash equivalents Estimate of Fair Value Measurement [Member] Dividends per share (in dollars per share) New Accounting Pronouncements, Policy [Policy Text Block] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Cash, cash equivalents and restricted cash, beginning of period Cash, cash equivalents and restricted cash, end of period Share-Based Payment Arrangement, Tranche One [Member] Career Shares [Member] Related to career shares. Statement [Table] Reclassification, Comparability Adjustment [Policy Text Block] Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Credit Facility [Axis] Credit Facility [Domain] us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity Line of Credit Facility, Current Borrowing Capacity Fair Value, off-Balance-Sheet Risk [Table] Revolving Credit Facility [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Share-Based Payment Arrangement, Tranche Two [Member] Share-Based Payment Arrangement, Tranche Three [Member] us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 Debt Instrument, Basis Spread on Variable Rate byd_FiniteLivedIntangibleAssetsTotalFutureAmortizationExpense Total future amortization The amount of finite lived intangible assets total future amortization expense. Note receivable us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity Line of Credit Facility, Maximum Borrowing Capacity byd_CumulativeImpairmentOfIntangibleAssetsExcludingGoodwill Intangible assets, cumulative impairment losses The cumulative impairment of intangible assets excluding goodwill. byd_CumulativeImpairmentOfIntangibleAssetsIndefiniteLivedExcludinggoodwill Intangible assets, cumulative impairment losses, indefinite lived The cumulative impairment of intangible assets indefinite lived, excluding goodwill. byd_FiniteLivedIntangibleAssetsCumulativeImpairmentLosses Intangible assets, cumulative impairment losses, finite lived The cumulative impairment losses from finite lived intangible assets. Obligation under assessment arrangements us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity Line of Credit Facility, Remaining Borrowing Capacity srt_StockRepurchaseProgramAuthorizedAmount1 Stock Repurchase Program, Authorized Amount Long-Term Debt, Type [Axis] Product and Service [Domain] Product and Service [Axis] Marketing Agreement [Member] Represents the marketing agreement. Outstanding principal amounts Long-Term Line of Credit Consolidated Entities [Axis] Consolidated Entities [Domain] Line of Credit [Member] us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Line of Credit Facility [Table] Release of restricted stock units, net of tax (in shares) Asset Class [Axis] Release of restricted stock units, net of tax Measurement Frequency [Axis] Commitments and Contingencies Disclosure [Text Block] Statement [Line Items] Fair Value Hierarchy and NAV [Axis] Common stock, shares issued (in shares) Common stock, shares outstanding (in shares) Balance (in shares) Balance (in shares) Award Type [Domain] Common stock, shares authorized (in shares) us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 Share Repurchase Program, Remaining Authorized, Amount Schedule of Accrued Liabilities [Table Text Block] Dividends declared not yet paid us-gaap_DividendsPayableCurrentAndNoncurrent Intangible Asset and Goodwill [Table Text Block] Common stock, $0.01 par value, 200,000,000 shares authorized; 73,114,319 and 76,368,491 shares outstanding us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo 2028 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree 2029 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths 2027 Accounts payable us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear 2026 (excluding six months ended June 30, 2026) us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour 2030 us-gaap_TableTextBlock Notes Tables Borrowings under credit facilities us-gaap_ComprehensiveIncomeNetOfTax Comprehensive income attributable to Boyd Gaming byd_FinitelivedIntangibleAssetExpectedAmortizationAfterYearFour Thereafter Amount of amortization for asset, excluding financial asset and goodwill, lacking physical substance with finite life expected to be recognized after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Subsequent Events [Text Block] Accrued liabilities Total accrued liabilities Dividends payable Payroll and related Significant Accounting Policies [Text Block] Senior Note 4.750% Due 2027 [Member] Senior note with interest rate of 4.750% due 2027. Non-cash operating lease expense Operating lease liabilities, net of current portion Other Operating leases Interest Prior Bank Credit Facility [Member] Relating to the prior bank credit facility. O 2026 Q2 Dividends [Member] Related to dividends 2026 Q2. Consolidation, Variable Interest Entity, Policy [Policy Text Block] Income taxes payable us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue Balance, asset Balance, asset Long-term debt, net of current maturities and debt issuance costs Project development, preopening and writedowns Project development, preopening and writedowns Amount of expense for Project development, preopening, and writedowns. Maintenance and utilities Amount of expense during the period for maintenance and utilities. Corporate expense Corporate expense Corporate expense Amount of expense during the period by corporate. us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis Debt Securities, Available-for-Sale, Amortized Cost Master lease rent expense Master lease rent expense Amount of expense for the Master Lease rent. byd_NumberOfGamingEntertainmentProperties Number of Gaming Entertainment Properties The number of gaming entertainment properties. Release of performance stock units, net of tax Value of stock related to Performance Stock Awards issued during the period, net of the stock value of such awards forfeited. Release of performance stock units, net of tax (in shares) Number, after shares used to satisfy grantee's tax withholding obligation for award under share-based payment arrangement, of performance stock units issued. Excludes cash used to satisfy grantee's tax withholding obligation. Gaming Taxes [Policy Text Block] Disclosure of accounting policy for gaming taxes. byd_IntangibleAssetsAccumulatedForeignCurrencyTranslationGainLoss Effect of foreign currency exchange Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance. Schedule of Cash and Cash Equivalents and Restricted Cash [Table Text Block] Tabular disclosure of cash, cash equivalents, and restricted cash. The 2021 Program [Member] Represents information regarding the 2021 program. Long-term debt, net Share Repurchase Program [Table] Statement of Stockholders' Equity [Abstract] Intangible Asset, Finite-Lived, Class [Axis] Statement of Comprehensive Income [Abstract] Intangible Asset, Finite-Lived, Class [Domain] Statement of Cash Flows [Abstract] Gaming License Right [Member] Gaming license rights Host Agreements [Member] Host agreements Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Long-Term Debt, Type [Domain] Stockholders' equity Depreciation Expense [Table Text Block] The tabular disclosure of depreciation expense. Equity Components [Axis] Riverboats And Barges [Member] Riverboats and barges Accrued Liabilities [Table] The disclosure of the (a) carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business (accounts payable); (b) other payables; and (c) accrued liabilities. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). An alternative caption includes accrued expenses. Operating lease liabilities us-gaap_IncreaseDecreaseInOperatingLeaseLiability Development Agreements [Member] Development agreements Effect of Foreign Currency Exchange byd_GoodwillAccumulatedForeignCurrencyTranslationGainLoss Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. byd_FinitelivedIntangibleAssetsAccumulatedForeignCurrencyTranslationGainLoss Effect of foreign currency exchange, finite lived Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Equity Component [Domain] us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill Fair Value, Inputs, Level 2 [Member] byd_IndefinitelivedIntangibleAssetsAccumulatedAmortization Intangible assets, cumulative amortization, indefinite lived Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. Fair Value, Inputs, Level 3 [Member] byd_IntangibleAssetsAccumulatedAmortization Intangible assets, cumulative amortization Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance. Fair Value, Inputs, Level 1 [Member] AOCI Attributable to Parent [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Outstanding chips Carrying value as of the balance sheet date of obligations incurred through that date and payable for outstanding chip liabilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Advance deposits Carrying value as of the balance sheet date of obligations incurred through that date and payable for advance deposits by customers for the entity's goods and services. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Cost of revenue Player loyalty program Carrying value as of the balance sheet date of obligations incurred through that date and payable for player loyalty programs of the entity. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Gaming Carrying value as of the balance sheet date of obligations incurred through that date and payable for gaming goods and services. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Foreign Currency Transactions and Translations Policy [Policy Text Block] Property and equipment, net Property and equipment, net Property and equipment, gross Payables incurred for capital expenditures byd_IndefinitelivedIntangibleAssetsAccumulatedForeignCurrencyTranslationGainLoss Effect of foreign currency exchange, indefinite lived Amount of accumulated foreign currency translation gain (loss) which increases (decreases) an asset, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. Subsequent Event [Table] byd_TaxesDepositedPursuantToTheOnlineCollaborativeAgreements Taxes Deposited Pursuant to the Online Collaborative Agreements Amount of tax expense classified as taxes deposited pursuant to the online collaborative agreements. Swing Loan [Member] Represents swing loan. Bank Credit Facility [Member] The Bank Credit Facility. Long-term debt, outstanding principal, noncurrent Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt, excluding current maturities. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Term A Loan [Member] Term Loan A Senior Note 4750 Due 2031 Member Represents information related to 4.750% senior note due 2031. Furniture and Fixtures [Member] Share-based compensation costs byd_ShareBasedPaymentArrangementSharesIssuedInPeriodNetOfTaxWithholdings Share Based Payment Arrangement, Shares Issued In Period, Net of Tax Withholdings (in shares) Shares issued during the period net of tax withholding for share based payment arrangements byd_SharesIssuedPerUnit Shares Issued Per Unit (in shares) Number of Shares issued Per Unit. Share Repurchase Program [Table Text Block] The tabular disclosure for the share repurchase program. Average repurchase price per share (in dollars per share) Average repurchase price per share under the share repurchase program. Deferred income taxes Accounts Payable and Accrued Liabilities Disclosure [Text Block] Fair Value Disclosures [Text Block] byd_DebtSecurityInterestRateStatedPercentage Debt Security Interest Rate Stated Percentage Percentage interest rate of debt security. Fair Value, by Balance Sheet Grouping [Table Text Block] Supplemental Disclosure of Cash Flow Information Liabilities, Current [Abstract] us-gaap_GainLossOnInvestments Non-cash interest income us-gaap_LiabilitiesCurrent Total current liabilities us-gaap_IntangibleAssetsGrossExcludingGoodwill Intangible assets, gross carrying value byd_DebtSecurityAvailableForSaleFairValueDiscountAmount Debt Security, Available-For-Sale, Fair Value Discount Amount Amount of fair value discount on available-for-sale debt securities. Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table] byd_RestrictedCashAndCashEquivalentsFairValueDisclosure Restricted cash Fair value portion of amount of cash and cash equivalents restricted as to withdrawal or usage. 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. Accounts receivable, net Investment, Available-For-Sale [Member] Available for sale investments. Downtown Las Vegas [Member] Downtown Las Vegas Las Vegas Locals [Member] Las Vegas locals Cash Flows from Financing Activities us-gaap_PaymentsToAcquireIntangibleAssets Cash paid for gaming license right Midwest and South [Member] Midwest and south byd_AdjustedEbitdar Adjusted EBITDAR Adjusted EBITDAR byd_ReportableSegmentAdjustedEbitdar Adjusted EBITDAR Total Reportable Segment Adjusted EBITDAR Reportable Segment Adjusted EBITDAR Customer Relationships [Member] byd_DeferredRent Deferred rent Amount of deferred rent expense during the period. byd_OtherOperatingCostsAndExpenses Total other operating costs and expenses Total costs of sales and operating expenses for the period, classified as other. Promotional allowance This element represents the estimated retail value of accommodations, food and beverage, and other services furnished to guests without charge. Lessee, Leases [Policy Text Block] Long-Term Debt [Text Block] us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment Less accumulated depreciation Accumulated other comprehensive loss us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization Intangible assets, cumulative amortization, finite lived Shareholders' Equity and Share-Based Payments [Text Block] Schedule Of Promotional Allowances [Table Text Block] Tabular disclosure of allowances made for promotions and free giveaways to customers. us-gaap_PaymentsToAcquireLoansReceivable Advances made under note receivable us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired Payments to Acquire Businesses, Net of Cash Acquired Cash paid for acquisitions, net of cash received O 2024 Q4 Dividends [Member] Related to dividends 2024 Q4. us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Income before income taxes us-gaap_GainsLossesOnExtinguishmentOfDebt Gain (Loss) on Extinguishment of Debt Loss on early extinguishments and modifications of debt Additional paid-in capital us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage us-gaap_OtherOperatingIncomeExpenseNet Other operating items, net Other operating items, net Noncontrolling interest Prepaid expenses and other current assets Use of Estimates, Policy [Policy Text Block] Transaction with noncontrolling interest us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1 Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Capital expenditures Long-term debt, outstanding principal Carrying value us-gaap_DebtInstrumentFairValue Long-term debt us-gaap_StockRepurchasedAndRetiredDuringPeriodValue Shares repurchased and retired us-gaap_DebtInstrumentFaceAmount Debt Instrument, Face Amount Current assets Amortization of debt financing costs and discounts on debt Stock options exercised The 2020 Plan [Member] Information related to the stock incentive 2020 Plan. us-gaap_AssetsCurrent Total current assets Fair Value, Recurring and Nonrecurring [Table] Goodwill [Table] Restricted Stock Units (RSUs) [Member] Fair Value Asset (Liability) Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block] Tabular disclosure of financial instrument using recurring unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Debt Instrument, Name [Domain] Stock options exercised (in shares) Long-term debt, interest rate Debt Instrument, Interest Rate, Stated Percentage Depreciation expense Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block] Trademarks [Member] Shares repurchased (in shares) Shares repurchased and retired (in shares) Schedule of Long-Term Debt Instruments [Table] Debt Instrument [Axis] Cash Flows from Operating Activities Cash Flows from Investing Activities us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash provided by operating activities us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash used in investing activities us-gaap_PaymentsOfDebtIssuanceCosts Debt financing costs Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block] us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash provided by (used in) financing activities us-gaap_ImpairmentOfLongLivedAssetsHeldForUse Long-Lived Asset, Held and Used, Impairment Loss Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Developed Technology Rights [Member] Reconciliation of Revenue and Expenses from Segments to Consolidated [Table Text Block] Tabular disclosure of all significant reconciling items in the reconciliation of total revenues and expenses from reportable segments to the entity's consolidated revenues. Operating Segments [Member] Accounting Policies [Abstract] Segments [Domain] Derecognition of lease liability Represents the derecognition of operating lease liability. Derecognition of right-of-use operating lease asset Represents the derecognition of right-of-use operating lease asset. Segments [Axis] Measurement Input Type [Axis] Income Statement [Abstract] us-gaap_NumberOfReportableSegments Number of Reportable Segments Measurement Input, Discount Rate [Member] us-gaap_NetIncomeLoss Net income attributable to Boyd Gaming Net income attributable to Boyd Gaming Dividends, record date Measurement Input Type [Domain] us-gaap_CostsAndExpenses Total operating costs and expenses us-gaap_BusinessCombinationContingentConsiderationLiability Business Combination, Contingent Consideration, Liability Accounting Standards Update and Change in Accounting Principle [Table] Income Tax, Policy [Policy Text Block] Asset, Impairment Loss Non-cash impairment of assets us-gaap_DeferredFinanceCostsNet Debt Issuance Costs, Net Long-term debt, unamortized original fees and costs O 2025 Q2 Dividends [Member] Related to dividends 2025 Q2. Dividends Declared [Table Text Block] Measurement Basis [Axis] Fair Value Hierarchy and NAV [Domain] Measurement Frequency [Domain] Vesting [Axis] us-gaap_RepaymentsOfLinesOfCredit Payments under credit facilities Other expense (income) Statement of Financial Position [Abstract] Vesting [Domain] Dividends, payment date us-gaap_NonoperatingIncomeExpense Total other expense, net Included in interest income, asset Included in other comprehensive income (loss), asset Cash paid for income taxes Income taxes receivable Variable Interest Entity, Primary Beneficiary [Member] Fair Value, Nonrecurring [Member] Fair Value, Recurring [Member] Other assets, net us-gaap_PaymentsForRepurchaseOfCommonStock Shares repurchased and retired us-gaap_IncreaseDecreaseInOtherOperatingAssets Other assets, net us-gaap_IncreaseDecreaseInDeferredIncomeTaxes Deferred income taxes Document Type Document Information [Line Items] Document Quarterly Report us-gaap_LesseeOperatingLeaseRenewalTerm Lessee, Operating Lease, Renewal Term (Year) Document Information [Table] us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1 Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period (Year) Entity Interactive Data Current Document Transition Report Weighted average diluted shares outstanding (in shares) Assets acquired in exchange for contingent consideration Intangible Asset, Indefinite-Lived, Class [Domain] Weighted average basic shares outstanding (in shares) Basic net income per common share (in dollars per share) us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Supply Commitment [Table] Intangible Asset, Indefinite-Lived, Class [Axis] Intangible assets, net Intangible assets, net us-gaap_FiniteLivedIntangibleAssetsNet Intangible assets, net, finite lived Document Fiscal Period Focus us-gaap_FiniteLivedIntangibleAssetsGross Intangible assets, gross carrying value, finite lived Document Fiscal Year Focus Depreciation and amortization us-gaap_DepreciationAndAmortization Restricted cash Marketing-Related Intangible Assets [Member] Amendment Flag Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Common Stock [Member] us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill Intangible assets, net, indefinite lived Goodwill, net Goodwill, net Goodwill Other liabilities us-gaap_IncreaseDecreaseInOtherOperatingLiabilities Document Period End Date Property, Plant, and Equipment [Text Block] Long-Lived Asset, Class [Domain] Legal Entity [Axis] Construction in Progress [Member] Business Combination [Domain] byd_PaymentsForTransferableFederalEnergyTaxCredit Payments for Transferable Federal Energy Tax Credit The amount of transferable federal energy tax credits purchased. Entity File Number Entity Tax Identification Number Supplemental Schedule of Non-cash Investing and Financing Activities Business Combination [Axis] Disaggregation of Revenue [Table] Entity [Domain] Entity Central Index Key Entity Registrant Name Business Combination [Policy Text Block] Foreign currency translation adjustments Foreign currency translation adjustments Entity Current Reporting Status Entity Incorporation, State or Country Code Current Fiscal Year End Date Fair value adjustments to available-for-sale securities O 2025 Q4 Dividends [Member] Represents the ordinary dividends for 2025 Q4. Managed and Other [Member] Relating to managed and other. Entity Filer Category Norfolk Casino [Member] Represents the Norfolk Casino. Entity Shell Company O2025 Q1 Dividends [Member] Represents dividends. Entity Emerging Growth Company Entity Small Business byd_AnticipatedExpenditures Anticipated Expenditures Amount of anticipated expenditures. Building and Building Improvements [Member] Online [Member] Relating to online. us-gaap_OperatingIncomeLoss Operating income us-gaap_ImpairmentLongLivedAssetHeldForUseStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration] Name of Property [Domain] Name of Property [Axis] Operating costs and expenses us-gaap_SegmentReportingOtherItemAmount Other segment expenses O 2026 Q1 Dividends [Member] In relation to 2026 Q1 dividends. us-gaap_BusinessCombinationConsiderationTransferred1 Business Combination, Consideration Transferred Entity Address, State or Province Entity Address, City or Town byd_RenewableEnergyTaxCreditPurchased Renewable Energy Tax Credit Purchased The amount of renewable energy credits purchased. Management Fee [Member] Represents management fee revenue. Interest expense, net of amounts capitalized Interest expense, net of amounts capitalized Retained earnings Entity Address, Address Line One City Area Code us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation Share-based compensation activities Local Phone Number Entity Address, Postal Zip Code Title of 12(b) Security Security Exchange Name Trading Symbol us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput Debt Securities, Available-for-Sale, Measurement Input Class of Stock [Axis] Base Rate [Member] Investment available for sale Variable Rate [Axis] Variable Rate [Domain] us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent Debt Securities, Available-for-Sale, Noncurrent Revenue [Policy Text Block] Entity Common Stock, Shares Outstanding Other comprehensive income (loss), net of tax: Other operating activities Eurodollar [Member] us-gaap_NetIncomeLossAttributableToNoncontrollingInterest Net loss attributable to noncontrolling interest Net loss attributable to noncontrolling interest Net income (loss) Net income Net income (loss) Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements Settlements, asset Long-Lived Asset, Held and Used, Impairment [Table] Property, Plant, and Equipment [Table] us-gaap_PaymentsForProceedsFromOtherInvestingActivities Other investing activities Common stock, par value (in dollars per share) Property, Plant and Equipment [Member] Basis of Accounting, Policy [Policy Text Block] us-gaap_OtherNonoperatingIncomeExpense Other, net Other financing activities Long-Lived Asset, Class [Axis] Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] us-gaap_Assets Total assets Assets Cash and Cash Equivalents, Policy [Policy Text Block] us-gaap_CashAcquiredFromAcquisition Cash Acquired from Acquisition Cash and cash equivalents Impaired Long-Lived Assets Held and Used by Type [Axis] byd_IndefinitelivedIntangibleAssetsExcludingGoodwillGross Intangible assets, gross carrying value, indefinite lived Amount before amortization and impairment of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. Diluted net income per common share (in dollars per share) us-gaap_PaymentsToAcquireBusinessesGross Payments to Acquire Businesses, Gross Depreciation and amortization Depreciation and amortization Asset Class [Domain] Casino [Member] Intangible Asset [Text Block] Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] us-gaap_FinitelivedIntangibleAssetsAcquired1 Intangible Asset, Finite-Lived, Acquired Food and Beverage [Member] Consolidation, Policy [Policy Text Block] us-gaap_InvestmentIncomeInterest Interest income Cash paid for interest, net of amounts capitalized Schedule of Long-Term Debt Instruments [Table Text Block] us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest Comprehensive loss attributable to noncontrolling interest Amounts attributable to noncontrolling interest: Occupancy [Member] Intangible Asset, Finite-Lived [Table] us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest Comprehensive income us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest Total stockholders' equity Balance Balance Inventories us-gaap_DeferredFinanceCostsNoncurrentNet Long-term debt, unamortized original fees and costs, noncurrent Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Noncontrolling Interest [Member] Schedule of Line of Credit Facilities [Table Text Block] us-gaap_StockholdersEquity Boyd Gaming Corporation stockholders' equity Goodwill [Table Text Block] Term A Loan Facility [Member] Term A Loan Facility Management Service [Member] us-gaap_PaymentsOfDividendsCommonStock Dividends paid Stock, Class of Stock [Table] Selling, general and administrative byd_SharebasedPaymentArrangementExpenseSellingGeneralAndAdministrative Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Corporate expense byd_SharebasedPaymentArrangementExpenseCorporateExpense Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Food & beverage byd_SharebasedPaymentArrangementExpenseFoodAndBeverage Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Room byd_SharebasedPaymentArrangementExpenseRoom Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Operating lease right-of-use assets Fed Funds Effective Rate Overnight Index Swap Rate [Member] Gaming byd_SharebasedPaymentArrangementExpenseGaming Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Design Works Studios [Member] Design Works Studios Other liabilities ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] Property, Plant, and Equipment [Table Text Block] Total Revenue Revenues us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax Revenue from Contract with Customer, Including Assessed Tax ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] Commitments and contingencies (Note 6)