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[Abstract] Document Transition Report Document Transition Report Number of Class A common share issued upon conversion of each Class B common share (in shares) Common Stock, Eligible Number Of Shares Issued Upon Conversion Of Each Share Common Stock, Eligible Number Of Shares Issued Upon Conversion Of Each Share Ten Largest Multichannel Video Provider Customers Ten Largest Multichannel Video Provider Customers [Member] Ten Largest Multichannel Video Provider Customers Designated as Hedging Instrument Designated as Hedging Instrument [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Other current assets Business Combination, Recognized Asset Acquired, Other Asset, Current City Area Code City Area Code AOCI Total AOCI AOCI Attributable to Parent [Member] Document Information [Table] Document Information [Table] All Individuals All Individuals [Member] Dividends paid Dividends paid Payments of Dividends Name Forgone Recovery, Individual Name 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[Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, outstanding (shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Diluted earnings per common share attributable to Versant shareholders (in dollars per share) Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Cash flow hedges, tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Cash Flow Hedging Cash Flow Hedging [Member] Business Combination Business Combination [Table Text Block] Adjustments to 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Related Party Transaction [Table] Sale of Stock [Axis] Sale of Stock [Axis] Other current assets Other Assets, Current Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating income Operating Income (Loss) Future revenue to be earned Revenue, Remaining Performance Obligation, Amount Current Fiscal Year End Date Current Fiscal Year End Date Net Comcast investment Net Parent Investment [Member] Net Parent Investment Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Related Party Transaction [Domain] Related Party Transaction [Domain] 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] Dividends declared (in dollars 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Arrangement Termination Date Amortizable intangible assets Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Total capitalized content costs, owned Film, Monetized in Film Group, Capitalized Cost Other noncurrent assets, net Other Assets, Noncurrent Distribution ratio Sale Of Stock, Distribution Ratio Sale Of Stock, Distribution Ratio Document Type Document Type Acquisitions of businesses Payments to Acquire Businesses, Net of Cash Acquired Derivative asset, current Derivative Asset, Current Currency translation adjustments, tax Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Accrued expenses and other current liabilities Accrued Liabilities, Current Fair Value as of Grant Date Award Grant Date 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Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Other, net Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Cash payments for business combination Payments to Acquire Businesses, Gross Share-based compensation Share-Based Payment Arrangement, Noncash Expense Schedule of Debt Schedule of Debt [Table Text Block] Employee Stock Employee Stock [Member] Customer [Domain] Customer [Domain] Total maturities, 2027 Long-Term Debt, Maturity, Year One Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic earnings per common share attributable to Versant shareholders (in dollars per share) Earnings Per Share, Basic Disclosure of share-based compensation arrangements by share-based payment award Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] Deferred revenue Contract with Customer, Liability, Current Repurchases of common stock under repurchase program and employee plans Payments for Repurchase of Common Stock Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Long-term debt Long-term debt, net of current portion Long-Term Debt, Excluding Current Maturities Award Type Award Type [Axis] Content costs Content costs Film, Monetized In Film Group, Capitalized Cost, And Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Capitalized Cost Film, Monetized In Film Group, Capitalized Cost, And Entertainment, License Agreement For Program Material, Including Sports Rights Advances, Capitalized Cost Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Receivables, net Receivables, net Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Recognized pre-tax losses Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Fair value assumption, expected volatility rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Contingent consideration Business Combination, Contingent Consideration, Liability Released, less amortization Film, Monetized in Film Group, Capitalized Cost, Released Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Percentage of total votes cast Common Stock, Voting Rights, Entitled Percentage Of Total Votes Cast Common Stock, Voting Rights, Entitled Percentage Of Total Votes Cast Customer concentration Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Net loss on investment activity and other (Gain) Loss On Investments And Other Noncash (Income) Loss, Net (Gain) Loss On Investments And Other Noncash (Income) Loss, Net Depreciation and amortization Cost, Depreciation, Amortization and Depletion Equity Awards Adjustments Equity Awards Adjustments [Member] Versant Class A Common Stock And Versant Class B Common Stock Versant Class A Common Stock And Versant Class B Common Stock [Member] Versant Class A Common Stock And Versant Class B Common Stock Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Hedging Relationship [Domain] Hedging Relationship [Domain] Total liabilities and equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Noncontrolling interests Equity, Attributable to Noncontrolling Interest Transactions with Comcast, net and separation related transactions Adjustments To Net Parent Investment, Transactions, Net Adjustments To Net Parent Investment, Transactions, Net Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related and Nonrelated Parties [Domain] Related and Nonrelated Parties [Domain] Schedule of receivables, net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Fair value of marketable equity securities Equity Securities, FV-NI, Noncurrent Name Awards Close in Time to MNPI Disclosures, Individual Name Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Purchase of investments Payments to Acquire Investments 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] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, no par value — authorized 20 million shares; none issued as of September 30, 2026 Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Reclasses from accumulated other comprehensive income, net of taxes Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Hedging Designation [Domain] Hedging Designation [Domain] Class of Stock [Domain] Class of Stock [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Name Measure Name Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Aggregate purchase consideration Business Combination, Consideration Transferred Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Maximum first lien net leverage ratio Debt Instrument, Covenant, First Lien Net Leverage Ratio, Maximum Debt Instrument, Covenant, First Lien Net Leverage Ratio, Maximum Name Trading Arrangement, Individual Name Unrecognized pretax compensation expense Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Cash and cash equivalents Cash and Cash Equivalent Shares Services And Other Allocated Costs Shares Services And Other Allocated Costs [Member] Shares Services And Other Allocated Costs Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Investments, Debt and Equity Securities [Abstract] Share-based compensation (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Stock, Class of Stock [Table] Stock, Class of Stock [Table] Net income Net income Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current Assets: Assets, Current [Abstract] Organization, Consolidation and Presentation of Financial Statements [Table] Organization, Consolidation and Presentation of Financial Statements [Table] Organization, Consolidation and Presentation of Financial Statements [Table] Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income tax expense Income Tax Expense (Benefit) Customer Concentration Risk Customer Concentration Risk [Member] Award Timing Method Award Timing Method [Text Block] Increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Deferred income taxes Business Combination, Recognized Liability Assumed, Deferred Tax Liability Net transfers to Comcast Proceeds From (Payments For) Changes In Parent Investment Proceeds From (Payments For) Changes In Parent Investment Net income attributable to Versant Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Assets held for sale, goodwill Disposal Group, Including Discontinued Operation, Goodwill Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of accumulated other comprehensive loss ("AOCI") Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Noncurrent content obligations Program Rights Obligations, Noncurrent Schedule of cost of revenue Schedule Of Cost Of Revenue [Table Text Block] Schedule Of Cost Of Revenue Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]