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[Table Text Block] Investments in and Advances to Affiliates Categorization [Axis] Investment, Issuer Affiliation [Axis] Name Measure Name Balance as of December 31, 2025 Balance as of March 31, 2026 Restructuring Reserve Customer A Customer A [Member] Customer A SACO Technologies Inc. (“SACO”) SACO [Member] SACO Technologies Inc. Secured Debt Secured Debt [Member] Operating lease liabilities, current Operating Lease, Liability, Current Corporate general and administrative expenses, net - MSG Entertainment Services Agreement Corporate General And Administrative Expenses, Net [Member] Corporate General And Administrative Expenses, Net 3.50% Convertible Senior Notes 3.5% Senior Notes [Member] 3.5% Senior Notes Other comprehensive (loss) income, before income taxes Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Deferred tax liabilities, net Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Mandatory cash sweep Debt Instrument, Payment for Mandatory Cash Sweep Debt Instrument, Payment for Mandatory Cash Sweep Award Timing Method Award Timing Method [Text Block] Litigation Case [Domain] Litigation Case [Domain] MSG Networks term loan facility MSGN Term Loan Facility MSGN Term Loan Facility [Member] MSGN Term Loan Facility Award Type [Axis] Award Type [Axis] Cumulative Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Total debt Long-term debt Long-Term Debt Other operating expenses, net Other Operating Expenses, Net [Member] Other Operating Expenses, Net Legal Entity [Axis] Legal Entity [Axis] Total assets Assets Investment, Name [Domain] Investment, Name [Domain] Trading Symbol Trading Symbol Exosphere Exosphere [Member] Exosphere Entity Address, City or Town Entity Address, City or Town OPERATING ACTIVITIES: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Loss contingency, claims filed involving fiduciary breaches Loss Contingency, New Claims Filed Involving Fiduciary Breaches Loss Contingency, New Claims Filed Involving Fiduciary Breaches In-process Produced Content Costs, In-Process Produced Content Costs, In-Process Other segment expenses Segment Reporting, Other Segment Item, Amount Food, beverage, and merchandise revenues Food, Beverage And Merchandise Revenues [Member] Food, Beverage and Merchandise Revenues [Member] Total Accrued expenses and other current liabilities Accrued Expenses and Other Current Liabilities Accrued Expenses and Other Current Liabilities Effect of exchange rates on cash, cash equivalents, and restricted cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Concentration Risk Type [Axis] Concentration Risk Type [Axis] James L. Dolan [Member] James L. Dolan Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Gotham Advanced Media and Entertainment, LLC (“GAME”) Gotham Advanced Media Entertainment, LLC [Member] Gotham Advanced Media Entertainment, LLC Entity Emerging Growth Company Entity Emerging Growth Company Letter of credit, to be paid 2029 Year ending December 31, 2029 Long-Term Debt, Maturity, Year Three Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Less: Net income attributable to participating securities Undistributed Continuing Operation Earnings (Loss), Allocation to Participating Securities, Basic Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Unamortized deferred financing costs Debt Issuance Costs, Net Other equity investments with readily determinable fair values held in trust under the Company’s Executive Deferred Compensation Plan Equity Securities Investment With Readily Determinable Fair Values Held In Trust [Member] Equity Securities Investment With Readily Determinable Fair Values Held In Trust Other commitments, to be paid​, 2029 Other Commitment, to be Paid, Year Three Restructuring Liability Restructuring Reserve [Roll Forward] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Cost and Equity Method Investments Cost and Equity Method Investments [Table Text Block] Tabular disclosure of cost and equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. 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Dolan, Trust [Member] James L. 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Includes, but is not limited to, legal, accounting, and other costs incurred to consummate the merger or acquisition in business combinations. 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Securities Investment Without Readily Determinable Fair Value [Member] Contractual obligation, to be paid, 2027 Contractual Obligation, to be Paid, Year One Contractual obligation, to be paid, thereafter Contractual Obligation, to be Paid, After Year Four Contractual Obligation, to be Paid, After Year Four Net unamortized loss arising during the period Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Income taxes paid, net Income Taxes Paid, Net Share-Based Payment Arrangement, Disclosure [Abstract] Contract Assets and Liabilities [Line Items] Contract Assets And Liabilities [Line Items] [Line Items] for Contract Assets and Liabilities [Table] Award Timing Disclosures [Line Items] Accrued liabilities Accrued Liabilities Service cost Defined Benefit Plan, Service Cost Accrued payroll and employee related liabilities Employee-related Liabilities, Current Contract with customer, liability, revenue recognized, including opening balance Contract with Customer, Liability, Revenue Recognized, Including Opening Balance Contract with Customer, Liability, Revenue Recognized, Including Opening Balance Property and Equipment, net Property, Plant and Equipment Disclosure [Text Block] Payments for legal settlements Payments for Legal Settlements Stockholders' Equity Equity [Text Block] Direct operating expenses Direct Operating Costs 2026 LV Sphere Term Loan Facility 2026 LV Sphere Term Loan Facility [Member] 2026 LV Sphere Term Loan Facility Other Current Liabilities Other Current Liabilities [Table Text Block] Net income (loss) Net income (loss) Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Non-Current Liabilities: Liabilities, Noncurrent [Abstract] Other Commitments [Domain] Other Commitments [Domain] Construction in progress Construction in Progress [Member] Other accrued expenses Other Accrued Liabilities, Current Equity securities, FV-NI, unrealized gain Equity Securities, FV-NI, Unrealized Gain (Loss) Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt, Including Fees, Expenses And Other Direct Costs Gain (Loss) on Extinguishment of Debt, Including Fees, Expenses And Other Direct Costs Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Ticketing and venue license fee revenues Ticketing And Venue License Fee Revenues [Member] Ticketing and Venue License Fee Revenues [Member] Restructuring charges Restructuring charges Restructuring Charges Adoption Date Trading Arrangement Adoption Date Base Rate Base Rate [Member] Debt Discount Debt Instrument, Unamortized Discount, Noncurrent Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Accounts receivable, net Increase (Decrease) in Accounts Receivable Contracts with customers, assets, net Contract with Customer, Asset, after Allowance for Credit Loss Entity Current Reporting Status Entity Current Reporting Status Capital expenditures, net Payments for (Proceeds from) Productive Assets Customer [Axis] Customer [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Operating income (loss) Total operating expenses, net Operating Income (Loss) Line of Credit Line of Credit [Member] Consolidated Entities [Domain] Consolidated Entities [Domain] Accumulated deficit Retained Earnings (Accumulated Deficit) Name of Property [Axis] Name of Property [Axis] Financial Instrument [Axis] Financial Instrument [Axis] Investments Investments in and Advances to Affiliates, Schedule of Investments [Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Money Market Accounts, Time Deposits, and U.S. Treasury Bills Money Market Accounts, Time Deposits, and U.S. Treasury Bills [Member] Money Market Accounts, Time Deposits, and U.S. Treasury Bills Repayment of debt Repayments of Debt Other operating expenses, net Other Operating Income (Expense), Net Current Fiscal Year End Date Current Fiscal Year End Date Class of Stock [Axis] Class of Stock [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair 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customers, net Accounts Receivable and Related Party Receivables [Member] Accounts Receivable and Related Party Receivables [Member] Variable Rate [Domain] Variable Rate [Domain] Deferred revenue, including non-current portion Contract with Customer, Liability Venue occupancy, number of guests Venue Occupancy, Number Of Guests Venue Occupancy, Number Of Guests Weighted-average number of common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] All Adjustments to Compensation All Adjustments to Compensation [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Amendment Flag Amendment Flag Letter of credit, to be paid 2028 Year ending December 31, 2028 Long-Term Debt, Maturity, Year Two Postretirement Plan Other Postretirement Benefits Plan [Member] Depreciation and amortization expense on property and equipment Cost, Depreciation, Amortization and Depletion Termination Date Trading Arrangement Termination Date Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Unamortized Deferred Financing Costs Debt Issuance Costs, Noncurrent, Net Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Studio Campus Studio Campus [Member] Studio Campus Measure: Measure [Axis] Non-current portion Long-Term Debt, Excluding Current Maturities [Abstract] Pension plans and postretirement plans: Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract] Description of Business And Basis of Presentation [Abstract] Description Of Business And Basis Of Presentation [Abstract] Description of Business And Basis of Presentation [Abstract] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Basic (in shares) Weighted Average Number of Shares 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Attributable to Parent Litigation settlement, amount awarded to other party Litigation Settlement, Amount Awarded to Other Party Carrying Amount of Goodwill by Reportable Segment Schedule of Goodwill [Table Text Block] Additional Financial Information [Abstract] Additional Financial Information Interest expense Interest Expense, Nonoperating Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Debt instrument, measurement input Debt Instrument, Measurement Input Loss Contingencies [Line Items] Loss Contingencies [Line Items] Insider Trading Arrangements [Line Items] Security Exchange Name Security Exchange Name Contractual obligation, to be paid, 2028 Contractual Obligation, to be Paid, Year Two Letter of credit, to be paid, remainder of 2026 Year ending December 31, 2026 Long-Term Debt, Maturity, Remainder of Fiscal Year Other Product and Service, Other [Member] Building, square footage (in square feet) Building, Square 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Statement [Line Items] Variable Rate [Axis] Variable Rate [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Consolidation Items [Axis] Consolidation Items [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Counterparty Name [Axis] Counterparty Name [Axis] James L. 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