Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Title of 12(b) Security Title of 12(b) Security Subsequent event Subsequent Event [Member] Telenet Credit Facility Telenet Credit Facility [Member] Telenet Credit Facility [Member] Weighted average interest rate Debt, Weighted Average Interest Rate Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Segment Reporting [Abstract] Equity interest issued as consideration percentage Business Combination, Equity Interest Issued As Consideration, Percentage Business Combination, Equity Interest Issued As Consideration, Percentage Principal payments on capital-related vendor financing Principal payments on capital-related vendor financing Repayments Of Long Term Debt On Capital Financing From Vendors Repayments Of Long Term Debt On Capital Financing From Vendors Loss contingency accrual Loss Contingency Accrual Leases Lessee, Finance Leases [Text Block] Cash received from the sale of other investments Proceeds from Sale, Maturity and Collection of Investments Contract assets Contract with Customer, Asset, after Allowance for Credit Loss 2027 Finance Lease, Liability, to be Paid, Year One Derivative Instrument [Axis] Derivative Instrument [Axis] Formula E Formula E [Member] Formula E [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Consolidated Entities [Axis] Consolidated Entities [Axis] Upon completion of the relevant compliance reporting requirements Debt Covenant, Scenario 1 [Member] Debt Covenant, Scenario 1 Average price paid per share (in dollars per share) Shares Acquired, Average Cost Per Share Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Operating activities Payments For (Proceeds From) Derivative Instrument, Operating Activities Payments For (Proceeds From) Derivative Instrument, Operating Activities Property and equipment, net Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment 2031 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Five Transitional period for continued brand use Disposal Group, Including Discontinued Operation, Transitional Period Disposal Group, Including Discontinued Operation, Transitional Period Accrued capital expenditures Accrued Capital Expenditures, Current Accrued Capital Expenditures, Current Leases [Abstract] Leases [Abstract] Other comprehensive earnings (loss), net of taxes: Other Comprehensive Income (Loss), Net of Tax [Abstract] Effective income tax rate reconciliation, foreign income tax rate differential, amount Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Consolidated Entities [Domain] Consolidated Entities [Domain] Dividend distributions by subsidiaries to noncontrolling interest owners Payments to Noncontrolling Interests Available to borrow: Debt Instrument, Unused Borrowing Capacity Amount, Under Covenants Debt Instrument, Unused Borrowing Capacity Amount, Under Covenants Gain associated with the VodafoneZiggo Acquisition Business Combination, Separately Recognized Transactions, Revenues and Gains Recognized Common stock, nominal value (in dollars per share) Common Stock, Par or Stated Value Per Share Cash and cash equivalents and restricted cash included in assets held for sale Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents Other than options outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Investments and related notes receivable (including $1,060.9 million and $1,631.5 million, respectively, measured at fair value on a recurring basis) (note 5) Long-term investments Long-Term Investments Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Total current liabilities Liabilities, Current Customer relationships Customer Relationships [Member] Current Derivative Liability, Current Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Netherlands NETHERLANDS Entity Address, City or Town Entity Address, City or Town Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] VodafoneZiggo Revolving Facility VodafoneZiggo Revolving Facility [Member] VodafoneZiggo Revolving Facility Condensed Consolidated Balance Sheet Statement of Financial Position [Abstract] Title of Individual [Domain] Title and Position [Domain] Net carrying amount Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Significant other observable inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Non-operating income (expense): Nonoperating Income (Expense) [Abstract] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Fair value of off-market component of certain arrangements payable to Vodafone Business Combination, Present Value of Unfavorable Component of Future Royalty Payments Business Combination, Present Value of Unfavorable Component of Future Royalty Payments Schedule of Lease Balances Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Other comprehensive earnings (loss) Other comprehensive earnings (loss), net of taxes Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Liberty Global Parent Company [Member] United States UNITED STATES Interkabel Acquisition Interkabel Acquisition [Member] Interkabel Acquisition [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Investment Income [Table] Investment Income [Table] Wyre Wyre [Member] Wyre Nexfibre Networks Limited (nexfibre JV) Nexfibre Networks Limited (nexfibre JV) [Member] Nexfibre Networks Limited (nexfibre JV) Other accrued and current liabilities Business Combination, Recognized Liability Assumed, Other Liability, Current Schedule of Performance Measures of our Reportable Segments Segment Reporting [Table Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] VodafoneZiggo JV Loan VodafoneZiggo JV Loan [Member] VodafoneZiggo JV Loan [Member] Related Party [Axis] Related and Nonrelated Parties [Axis] Revenue Recognition and Related Costs Revenue from Contract with Customer [Policy Text Block] ROU assets: Right-Of-Use Asset Obtained In Exchange For Lease Liability [Abstract] Right-Of-Use Asset Obtained In Exchange For Lease Liability [Abstract] Non-subscription revenue Mobile Non-Subscription [Member] Mobile Non-Subscription [Member] Schedule of Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Document Period End Date Document Period End Date Held for sale Discontinued Operations, Held-for-Sale [Member] Current liabilities held for sale (note 4) Held-for-sale liabilities Disposal Group, Including Discontinued Operation, Liabilities, Current Principal amount Debt Instrument, Face Amount 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two VodafoneZiggo VodafoneZiggo [Member] VodafoneZiggo Maturity term Debt Instrument, Term Business combination, acquired Business Combination, Recognized Liability Assumed, Long-Term Debt, Noncurrent Treasury shares, at cost Treasury Stock, Common, Value Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Basis Swaps Basis Swap [Member] Weighted average remaining lease term for finance leases (in years) Finance Lease, Weighted Average Remaining Lease Term 2028 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Two Purchase commitments Purchase Commitments [Member] Purchase Commitments [Member] Accumulated other comprehensive earnings, net of taxes Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Class B Common Class B [Member] Consolidation Items [Domain] Consolidation Items [Domain] Effective income tax rate reconciliation, derecognition of litigation-related receivable, amount Effective Income Tax Rate Reconciliation, Derecognition Of Litigation-Related Receivable, Amount Effective Income Tax Rate Reconciliation, Derecognition Of Litigation-Related Receivable, Amount Current portion Operating Lease, Liability, Current Earnings (Loss) per Share Earnings Per Share [Text Block] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Ziggo Group Ziggo Group [Member] Ziggo Group Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Schedule of Revenue by Major Category Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Table Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Discount rate Measurement Input, Discount Rate [Member] Cash consideration paid at closing Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Accrued income taxes Accrued Income Taxes, Current Schedule of Fair Value of Consideration Transferred Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Percent of awards that may be banked Share-based Compensation Arrangement by Share-based Payment Award, Percent Of Awards That May Be Banked Share-based Compensation Arrangement by Share-based Payment Award, Percent Of Awards That May Be Banked Credit Facility [Domain] Credit Facility [Domain] Depreciation and amortization Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Cross-currency and interest rate derivative contracts Cross-currency and interest rate derivative contracts Cross Currency Interest Rate Contract [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] 2028 Finance Lease, Liability, to be Paid, Year Two Total purchase consideration and fair value of previously held equity investment Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) Disposal Group Name [Domain] Disposal Group Name [Domain] Dividends Dividends 2030 Finance Lease, Liability, to be Paid, Year Four Aggregate Variable and Fixed Rate Indebtedness Aggregate Variable And Fixed Rate Indebtedness [Member] Aggregate Variable And Fixed Rate Indebtedness [Member] Entities [Table] Entities [Table] Financing Facility Financing Facility [Member] Financing Facility EdgeConneX EdgeConneX, Inc. (EdgeConneX) EdgeConneX Inc. [Member] EdgeConneX Inc. Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Incremental shares (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Less: present value discount Finance Lease, Liability, Undiscounted Excess Amount Other Other Intangible Assets [Member] Accumulated depreciation Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Operating cash outflows from operating leases Operating Lease, Payments Award Timing Predetermined Award Timing Predetermined [Flag] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Share-based compensation (note 13) APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Quoted prices in active markets for identical assets (Level 1) Fair Value, Inputs, Level 1 [Member] Long-term Derivative Asset, Noncurrent Effective tax rate Effective Income Tax Rate Reconciliation, Percent Repurchases and cancellations of Liberty Global common shares (note 12) Stock Repurchased and Retired During Period, Value Pension-related adjustments and other Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Estimated fair value Long-Term Debt, Fair Value Plan Name [Domain] Plan Name [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Options outstanding, weighted average exercise or base price (in dollars per shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Gain (loss) on change in credit risk valuation included in realized and unrealized gains (losses) on derivative instruments, net Gain (Loss) On Credit Risk Derivatives Net Recognized In Earnings Gain (Loss) On Credit Risk Derivatives Net Recognized In Earnings Operating leases Operating Lease, Right-of-Use Asset VodafoneZiggo TowerCo Sale VodafoneZiggo TowerCo Sale [Member] VodafoneZiggo TowerCo Sale Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Current portion of debt and finance lease obligations Long-Term Debt and Lease Obligation, Current Expiration Date Trading Arrangement Expiration Date 2030 Long-Term Debt, Maturity, Year Four Percent of annual incentive compensation receivable in shares Shareholder Inventive Program, Percent Of Annual Incentive Compensation Shareholder Inventive Program, Percent Of Annual Incentive Compensation Restricted cash included in other current assets and other assets, net Restricted Cash and Cash Equivalent Total cash outflows from operating and finance leases Operating And Finance Lease, Payments Operating And Finance Lease, Payments Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Dispositions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Cash paid for amounts included in the measurement of lease liabilities: Cash Flow, Lessee [Abstract] Cash Flow, Lessee [Abstract] Options exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Trade receivables, net Business Combination, Recognized Asset Acquired, Receivable, Current Support equipment, buildings and land Support Equipment, Buildings and Land [Member] Support Equipment, Buildings and Land [Member] Deferred financing costs, discounts and premiums, net Debt Instrument, Unamortized Discount (Premium), Net Fair value of previously held equity investment in VodafoneZiggo Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Fair Value Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Related Party Transaction [Axis] Related Party Transaction [Axis] Long-lived Assets Long Lived Assets Disclosure [Text Block] The entire disclosure for long-lived assets. Net earnings (loss) attributable to Liberty Global shareholders Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Segments [Domain] Segments [Domain] Interest Rate Swap Interest Rate Swap [Member] Beginning of period End of period Total cash and cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Video Video [Member] Video Income tax penalties and interest expense Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Debt Debt Disclosure [Text Block] VodafoneZiggo JV Receivable I VodafoneZiggo JV Receivable I [Member] VodafoneZiggo JV Receivable I Disposal Group Classification [Domain] Disposal Group Classification [Domain] Business Combination [Table] Business Combination [Table] Acquisitions and Dispositions Mergers, Acquisitions and Dispositions Disclosures [Text Block] Broadband internet Broadband Internet [Member] Broadband Internet PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Secured debt Secured Debt [Member] Total debt Long-Term Debt Contractual Maturities Long-Term Debt Contractual Maturities Operating costs and expenses Operating expenses: Costs and Expenses Thereafter Long-Term Debt, Maturity, after Year Five Weighted average discount rate, for finance leases Finance Lease, Weighted Average Discount Rate, Percent Stated interest percentage Debt Instrument, Interest Rate, Stated Percentage Total Liberty Global shareholders Equity, Attributable to Parent Telenet Term Loan AR Telenet Term Loan AR [Member] Telenet Term Loan AR Other assets, net Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent Disposal group, disposed of by sale, not discontinued operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] ASSETS Assets [Abstract] U.K. and Netherlands U.K. And Netherlands [Member] U.K. And Netherlands Fair value, nonrecurring Fair Value, Nonrecurring [Member] Insider Trading Policies and Procedures [Line Items] Acquisitions and related adjustments Goodwill, Measurement Period Adjustment Trade receivables, allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current PSUs Performance Shares [Member] Deferred income tax benefit Deferred Income Tax Expense (Benefit) Non-deductible net losses from foreign investments Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Telenet Revolving Facility I Telenet Revolving Facility I [Member] Telenet Revolving Facility I Liberty Global Europe Holdings BV Liberty Global Europe Holdings BV [Member] Liberty Global Europe Holdings BV Impairment, restructuring and other operating items, net (note 10) Impairment, restructuring and other operating items, net Impairment, restructuring and other operating items, net Restructuring, Settlement and Impairment Provisions Total residential fixed revenue Total Residential Fixed Revenue [Member] Total Residential Fixed Revenue Held by Liberty Global employees Employees [Member] Employees [Member] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Excluded potentially dilutive employee share-based incentive awards (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Changes in Carrying Amount of Goodwill Goodwill [Table Text Block] Entity Central Index Key Entity Central Index Key Telenet Overdraft Facility Telenet Overdraft Facility [Member] Telenet Overdraft Facility [Member] Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Effective income tax (benefit) expense Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Gain associated with the VodafoneZiggo Acquisition (note 4) Gain associated with the VodafoneZiggo Acquisition Gain (Loss) On Business Acquisition Gain (Loss) On Business Acquisition 2026 (remainder of year) Long-Term Debt, Maturity, Remainder of Fiscal Year Liabilities held for sale Disposal Group, Including Discontinued Operation, Liabilities Adjustments due to changes in subsidiaries’ equity and other, net Stockholders' Equity, Other Ownership [Axis] Ownership [Axis] Percentage of legal and other third party, fees Percentage Of Legal And Other Third Party, Fees Percentage Of Legal And Other Third Party, Fees Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Investment, Name [Axis] Investment, Name [Axis] Long-term portion Finance Lease, Liability, Noncurrent Investments Investment Holdings [Text Block] All other category Reportable Segment, Aggregation before Other Operating Segment [Member] Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Debt Covenant [Domain] Debt Covenant [Domain] Debt Covenant [Domain] Other current assets Business Combination, Recognized Asset Acquired, Other Asset, Current Total payments Finance Lease, Liability, to be Paid Accumulated other comprehensive earnings (loss), net of taxes AOCI Attributable to Parent [Member] CPE Customer Premises Equipment [Member] Customer Premises Equipment [Member] All Individuals All Individuals [Member] Realized and unrealized gains (losses) due to changes in fair values of certain investments, net (notes 5 and 7) Realized and unrealized gains due to changes in fair values of certain investments, net Realized and unrealized gains (losses) due to changes in fair values of certain investments, net Realized And Unrealized Gains (Losses) Due To Changes In Fair Values of Certain Investments, Net Realized And Unrealized Gains (Losses) Due To Changes In Fair Values of Certain Investments, Net Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] VM Ireland Credit Facility VM Ireland Credit Facility [Member] VM Ireland Credit Facility Fair value of 10% equity interest in Ziggo Group issued to Vodafone Business Combination, Consideration Transferred, Equity Interest Statement [Line Items] Statement [Line Items] Total assets Assets Operating leases Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Total reportable segment revenue Reportable Legal Entities [Member] Options and SARs Options and Share Appreciation Rights (SARs) [Member] Options and Share Appreciation Rights (SARs) [Member] Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Operating Segments Third-party and affiliate Operating Segments [Member] Interest expense Interest Expense, Nonoperating Foreign currency and other Debt Instrument, Increase (Decrease), Foreign currency, acquisitions and other, Net Debt Instrument, Increase (Decrease), Foreign currency, acquisitions and other, Net Schedule of Stock-Based Compensation Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Revenue associated with transitional services Disposal Group, Including Discontinued Operation, Revenue Share-based Compensation Share-Based Payment Arrangement [Text Block] Business combination, acquired excluding accrued interest Business Combination, Recognized Liability, Assumed, Long-Term Debt, Excluding Accrued Interest Business Combination, Recognized Liability, Assumed, Long-Term Debt, Excluding Accrued Interest Effective income tax rate reconciliation, foreign income tax rate differential, percent Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent PEO PEO [Member] 2028 Long-Term Debt, Maturity, Year Two Notional amount due to counterparty Due To Counterparty [Member] Due To Counterparty [Member] Other long-term liabilities (notes 3 and 6) Other Liabilities, Noncurrent Goodwill (note 8) Goodwill Goodwill beginning balance Goodwill ending balance Goodwill Notional amount due from counterparty Due From Counterparty [Member] Due From Counterparty [Member] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Thereafter Finance Lease, Liability, to be Paid, after Year Five Instruments accounted for under measurement alternative Instruments Accounted For Under Measurement Alternative [Member] Instruments Accounted For Under Measurement Alternative Disposed of by sale Discontinued Operations, Disposed of by Sale [Member] Accumulated earnings Retained Earnings [Member] Long-term operating lease liabilities (note 10) Long-term portion Operating Lease, Liability, Noncurrent Revolving Credit Facility Revolving Credit Facility [Member] JV Reportable Segments JV Reportable Segments [Member] JV Reportable Segments Available to loan or distribute: Financing Receivable, Available To Distribute Financing Receivable, Available To Distribute Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Vodafone Vodafone [Member] Vodafone Diluted earnings (loss) attributable to Liberty Global shareholders per share (note 14) (in dollars per share) Earnings Per Share, Diluted Other Other Contract [Member] Vendor Financing Obligation [Roll Forward] Vendor Financing Obligation [Roll Forward] Vendor Financing Obligation Country Region Country Region Litigation Case [Domain] Litigation Case [Domain] Wyre Revolving Facility Wyre Revolving Facility [Member] Wyre Revolving Facility Ownership [Domain] Ownership [Domain] Debt Covenant [Axis] Debt Covenant [Axis] Debt Covenant Basic earnings (loss) attributable to Liberty Global shareholders per share (in dollars per share) Business Combination, Pro Forma Information, Pro Forma Earnings Per Share, Basic Excess of carrying amount over proportional share in investees net assets Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Revenue Total consolidated revenue Total Revenue from Contract with Customer, Excluding Assessed Tax Current assets held for sale (note 4) Held-for-sale assets Disposal Group, Including Discontinued Operation, Assets, Current Schedule of Equity Method Investments Equity Method Investments [Table Text Block] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] B2B Services B2B Services [Member] B2B Services [Member] Subscription revenue Business to Business Subscription [Member] Business to Business Subscription [Member] Wyre Term Facility Wyre Term Facility [Member] Wyre Term Facility Wyre Capex Term Facility Wyre Capex Term Facility [Member] Wyre Capex Term Facility Gain associated transaction Business Combination, Bargain Purchase, Gain Recognized, Amount Schedule of Maturities of Debt and Capital Lease Obligations Schedule of Maturities of Long-Term Debt [Table Text Block] Non-deductible net income (losses) from foreign investments (as a percent) Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Schedule of Equity Method Investments [Table] Equity Method Investment [Table] Title of Individual [Axis] Title and Position [Axis] Current liabilities held for sale Business Combination, Recognized Liability Assumed, Current Liabilities Held For Sale Business Combination, Recognized Liability Assumed, Current Liabilities Held For Sale Operating income (loss) Operating Income (Loss) Remaining performance obligation, greater than one year Revenue, Remaining Performance Obligation, Amount Schedule of Maturities of Financing Lease Liabilities Finance Lease, Liability, to be Paid, Maturity [Table Text Block] 2026 (remainder of year) Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Issuance of debt Proceeds from Issuance of Debt Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation [Table] Related Party Transaction [Domain] Related Party Transaction [Domain] Collateral Held [Axis] Collateral Held [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] VM Ireland Ireland [Member] Ireland Common stock, issued (in shares) Common Stock, Shares, Issued Nonconsolidated JV Nonconsolidated JV Nonconsolidated Joint Ventures [Member] Nonconsolidated Joint Ventures Balance of Level 3 investments at January 1, 2026 Balance of Level 3 investments at September 30, 2026 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Entity Information [Line Items] Entity Information [Line Items] Short-term investments at fair value Debt Securities, Available-for-Sale, Current Product and Service [Domain] Product and Service [Domain] Class of Stock [Line Items] Class of Stock [Line Items] Co-venturer ownership percentage Equity Method Investment, Co-Venturer Ownership Percentage Equity Method Investment, Co-Venturer Ownership Percentage Long-term Debt Long-Term Debt [Member] Net loss Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual Deferred tax liabilities (notes 4 and 11) Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Principal payments on operating-related vendor financing Principal payments on operating-related vendor financing Repayments Of Long Term Debt On Operating Financing From Vendors Repayments Of Long Term Debt On Operating Financing From Vendors Network and connectivity commitments Network and Connectivity Commitments [Member] Network and Connectivity Commitments [Member] 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Tax Year 2018 Tax Year 2018 [Member] Intangible assets subject to amortization, net Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Assets: Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Foreign currency translation adjustments and other, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Derivative instruments (note 6) Current Derivative Asset, Current Fair Value as of Grant Date Award Grant Date Fair Value Schedule of Goodwill [Table] Goodwill [Table] Value added tax, vendor financing arrangement Value Added Tax, Vendor Financing Arrangement Value Added Tax, Vendor Financing Arrangement Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Stock repurchase, remaining authorized amount Share Repurchase Program, Remaining Authorized, Amount Arrangement Duration Trading Arrangement Duration Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation [Line Items] Total Realized And Unrealized Gains (Losses) Due To Changes In Fair Values Of Certain Investments Realized And Unrealized Gains (Losses) Due To Changes In Fair Values of Certain Investments Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Gross carrying amount Intangible Asset, Finite-Lived, before Accumulated Amortization Share of results of affiliates, net (note 5) Share of results of affiliates, net Equity method investment Share of results of affiliates, net Income (Loss) from Equity Method Investments Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Non-subscription revenue Non-subscription Revenue [Member] Non-subscription Revenue Depreciation and amortization Finance Lease, Right-of-Use Asset, Amortization Goodwill [Roll Forward] Goodwill [Roll Forward] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Trade Names Trade Names [Member] Schedule of Assets and Liabilities Measured at Fair Value Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Award Type [Domain] Award Type [Domain] Total B2B revenue Business to Business [Member] Business to Business [Member] Interest expense Finance Lease, Interest Expense 2026 (remainder of year) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Fair Value Measurements Fair Value Disclosures [Text Block] Significant unobservable inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Deferred revenue Contract with Customer, Liability Repayments and repurchases of debt and finance lease obligations: Repayments And Repurchases Of Debt And Finance Lease Obligations [Abstract] Repayments And Repurchases Of Debt And Finance Lease Obligations Equity securities fair value Equity Securities, FV-NI and without Readily Determinable Fair Value Legal Entity [Axis] Legal Entity [Axis] Investing activities Payments for (Proceeds from) Derivative Instrument, Investing Activities Long-term investments at fair value Debt Securities, Available-for-Sale, Noncurrent Aggregate purchase price Treasury Stock, Value, Acquired, Cost Method Schedule of Finite-Lived Intangible Assets by Major Class [Table] Intangible Asset, Finite-Lived [Table] Non-NEOs Non-NEOs [Member] Ownership percentage Equity Method Investment, Ownership Percentage Schedule of Debt Schedule of Debt [Table Text Block] Leases Lessee, Operating Leases [Text Block] Investment, Name [Domain] Investment, Name [Domain] 2027 Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Repurchases of Liberty Global common shares Payments for Repurchase of Common Stock Deferred revenue (note 3) Contract with Customer, Liability, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Percentage of stock price trigger Share-based Compensation Arrangement by Share-based Payment Award, Threshold Percentage of Stock Price Trigger Share-based Compensation Arrangement by Share-based Payment Award, Threshold Percentage of Stock Price Trigger Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accumulated earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common shares Common Stock [Member] SMAs Debt Securities, Available-for-Sale Operating lease expense Operating Lease, Cost Performance target cap percentage Share-based Compensation Arrangement by Share-based Payment Award, Cap, Percent Share-based Compensation Arrangement by Share-based Payment Award, Cap, Percent 2027 Unrecorded Unconditional Purchase Obligation, to be Paid, Year One Derivative Contract [Domain] Derivative Contract [Domain] Foreign currency translation adjustments and other Goodwill, Foreign Currency Translation, Gain (Loss) Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Total liabilities and equity Liabilities and Equity Variable lease expense Variable Lease, Cost Thereafter Unrecorded Unconditional Purchase Obligation, to be Paid, after Year Five Employee Stock Option Share-Based Payment Arrangement, Option [Member] Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Reclassification adjustment included in net earnings (loss) (notes 4 and $5) Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Noncontrolling interests Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related Party [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Name Awards Close in Time to MNPI Disclosures, Individual Name 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] Long-term debt and finance lease obligations Business Combination Recognized Liability Assumed, Debt And Finance Lease Obligations, Noncurrent Business Combination Recognized Liability Assumed, Debt And Finance Lease Obligations, Noncurrent Property, Plant and Equipment, Type [Domain] Long-Lived Asset, Class [Domain] Schedule of Property, Plant and Equipment [Table] Property, Plant, and Equipment [Table] Adjusted EBITDA Adjusted Earnings Before Interest, Taxes, Depreciation, And Amortization Adjusted Earnings Before Interest, Taxes, Depreciation, And Amortization Adjustment to Compensation: Adjustment to Compensation [Axis] 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 Capital expenditures, net Payments to Acquire Productive Assets Purchased and extinguished Extinguishment of Debt, Amount Trade accounts receivable Trade Accounts Receivable [Member] Credit Facility [Axis] Credit Facility [Axis] Total assets Assets, Fair Value Disclosure VMO2 JV VMO2 JV (nonconsolidated) VMO2 JV [Member] VMO2 JV Long-term debt and finance lease obligations (notes 9 and 10) Long-term debt and finance lease obligations Long-Term Debt and Lease Obligation 2031 Finance Lease, Liability, to be Paid, Year Five Fluvius System Operator CV Fluvius System Operator CV [Member] Fluvius System Operator CV Name Measure Name Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Proceeds from sale of securities Proceeds from Sale of Equity Securities, FV-NI Additional paid-in capital Additional Paid-in Capital [Member] Current portion of debt and finance lease obligations Business Combination Recognized Liability Assumed, Debt And Finance Lease Obligations, Current Business Combination Recognized Liability Assumed, Debt And Finance Lease Obligations, Current Lease liabilities: Lease Liability [Abstract] Lease Liability [Abstract] Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Tax Period [Domain] Tax Period [Domain] Other commitments Other Commitments [Member] Other Commitments [Member] Assets acquired under finance leases Assets acquired under finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Number of borrowing groups Number Of Borrowing Groups Number Of Borrowing Groups UTB that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate 2031 Long-Term Debt, Maturity, Year Five Weighted average remaining lease term for operating leases (in years) Operating Lease, Weighted Average Remaining Lease Term ITV plc (ITV) ITV ITV - Subject to Re-Use Rights [Member] ITV - Subject to Re-Use Rights [Member] Non-PEO NEO Non-PEO NEO [Member] Foreign currency transaction gains (losses), net Foreign currency transaction losses (gains), net Gain (Loss), Foreign Currency Transaction, before Tax Fixed fee Fixed Charges [Member] Fixed Charges Programming and other direct costs of services (note 10) Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Net decrease in cash and cash equivalents and restricted cash Net decrease 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] Wyre Facility Wyre Facility [Member] Wyre Facility Warrants, fair value Warrants, Fair Value Disclosure Warrants, Fair Value Disclosure Net earnings (loss) attributable to Liberty Global shareholders Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Percent of interest income earned on loan included in investment Percent Of Interest Income Earned On Loan Included In Income (Loss) From Equity Method Investments Percent Of Interest Income Earned On Loan Included In Income (Loss) From Equity Method Investments Consolidated reportable segments Reportable Segment [Member] Reportable Segment Restatement Determination Date: Restatement Determination Date [Axis] Options exercisable, weighted average exercise price or base price (in dollars per shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Reallocation Goodwill, Transfers Leases Lessee, Leases [Policy Text Block] Other Other, net Other Unnamed Investment [Member] Other Unnamed Investment [Member] Capital-related vendor financing additions, before VAT Proceeds From Capital Related Vendor Financing Additions, Before Value Added Tax Proceeds From Capital Related Vendor Financing Additions, Before Value Added Tax Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Intangible asset, weighted average remaining useful lives Intangible Asset, Finite-Lived, Remaining Amortization Period Revenue recognized Contract with Customer, Liability, Revenue Recognized, Including Additions Contract with Customer, Liability, Revenue Recognized, Including Additions Statistical Measurement [Domain] Statistical Measurement [Domain] Licenses Licenses [Member] Licenses Document Fiscal Year Focus Document Fiscal Year Focus Purchase consideration excludes direct acquisition costs Direct acquisition costs Business Combination, Acquisition-Related Cost, Expense Revenue, remaining performance obligation, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Common stock Common Stock, Value, Issued 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Schedule of Vendor Financing Obligations Schedule of Long-Term Debt Instruments [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Telenet Senior Secured Notes Telenet Senior Secured Notes [Member] Telenet Senior Secured Notes [Member] Line of credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Tax Jurisdiction of Domicile [Extensible Enumeration] Tax Jurisdiction of Domicile [Extensible Enumeration] Schedule of Property and Equipment Additions of our Reportable Segments Schedule Of Reporting Capital Expenditures Of Reportable Segments [Table Text Block] Schedule of Reporting Capital Expenditures of Reportable Segments [Table Text Block] Valuation allowances Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Total debt and finance lease obligations Long-Term Debt and Lease Obligation, Including Current Maturities Principal Transaction Revenue [Table] Principal Transaction Revenue [Table] Amendment Flag Amendment Flag Cash received in connection with the sale Proceeds from sale of equity method investments Proceeds from Sale of Equity Method Investments Current liabilities: Liabilities, Current [Abstract] Principal payments on finance leases Financing cash outflows from finance leases (principal component) Finance Lease, Principal Payments Disposal Group Classification [Axis] Disposal Group Classification [Axis] Programming and other direct costs of services: Cost of Product and Service Sold, Including Pre Acquisition Amounts Cost of Product and Service Sold, Including Pre Acquisition Amounts Schedule of Debt Securities Debt Securities, Available-for-Sale [Table Text Block] Investments and receivables at fair value Investments And Related Notes Receivable, Fair Value Disclosure Investments And Related Notes Receivable, Fair Value Disclosure Loss Contingencies [Table] Loss Contingencies [Table] Fair value of equity interest issued to Vodafone (note 4) Stock Issued During Period, Value, Acquisitions Deferred liabilities Deferred License Fees Deferred License Fees Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Assets acquired under capital-related vendor financing arrangements Assets Acquired Under Capital-Related Vendor Financing Arrangements Assets Acquired Under Capital-Related Vendor Financing Arrangements Property, Plant, and Equipment [Abstract] Licensing Agreements Licensing Agreements [Member] PEO Total Compensation Amount PEO Total Compensation Amount Total consolidated property and equipment additions Segment Reporting, Long-Lived Asset, Expenditure for Addition Effective income tax rate reconciliation, foreign currency translation, percent Effective Income Tax Rate Reconciliation, Foreign Currency Translation, Percent Effective Income Tax Rate Reconciliation, Foreign Currency Translation, Percent Weighted average common shares outstanding (basic EPS computation) (in shares) Weighted Average Number of Shares Outstanding, Basic Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Notional amount Derivative, Notional Amount Secured debt Secured Debt Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Related party note receivable Receivable with Imputed Interest, Face Amount Principal Transaction Revenue [Line Items] Principal Transaction Revenue [Line Items] 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four Investments [Abstract] Investments [Abstract] Revenue Total revenue Revenue from Contract with Customer, Including Assessed Tax Telenet Telenet [Member] Telenet [Member] UPC Slovakia UPC Slovakia [Member] UPC Slovakia Assets held for sale Disposal Group, Including Discontinued Operation, Assets Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [Axis] Accumulated amortization Intangible Asset, Finite-Lived, Accumulated Amortization Vodafone-Ziggo and Telenet Vodafone-Ziggo And Telenet [Member] Vodafone-Ziggo And Telenet Borrowings repaid Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Vendor Financing Vendor Financing [Member] Vendor Financing [Member] Current portion Long-Term Debt, Current Maturities Total ROU assets Lease Asset Lease Asset Business combination, consideration transferred, equity interests issued and issuable, entity shares issued per acquiree share Business Combination, Consideration Transferred, Equity Interests Issued And Issuable, Entity Shares Issued Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued And Issuable, Entity Shares Issued Per Acquiree Share Accounting Changes and Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Litigation Case [Axis] Litigation Case [Axis] Non-controlling interests Noncontrolling Interest [Member] Wyre Facilities Wyre Facilities [Member] Wyre Facilities Total carrying amount of debt Long-term debt Long-Term Debt Senior notes due 2028 Senior Notes Due 2028 [Member] Senior Notes Due 2028 Net cash used by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Unrecognized tax benefits Unrecognized Tax Benefits Equity Equity [Text Block] Operating costs and expenses (exclusive of depreciation and amortization, shown separately below): Costs and Expenses [Abstract] Security Exchange Name Security Exchange Name Interest rate collars Interest Rate Collar [Member] Interest Rate Collar Ownership interest retained after disposal Equity Method Investment, Investment, Ownership Interest Disposed Of Equity Method Investment, Investment, Ownership Interest Disposed Of Total liabilities Liabilities, Fair Value Disclosure CANAL+ Polska S.A. CANAL+ Polska S.A. [Member] CANAL+ Polska S.A. Finance leases Finance Lease, Right-of-Use Asset, after Accumulated Amortization Schedule of Property and Equipment Property, Plant, and Equipment [Table Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Plume Design, Inc. (Plume) Plume Plume Design, Inc. (Plume) [Member] Plume Design, Inc. (Plume) Schedule of Weighted Average Shares Outstanding Schedule of Weighted Average Number of Shares [Table Text Block] Other Other Stock Plan [Member] Other Stock Plan VodafoneZiggo Senior and Senior Secured Notes VodafoneZiggo Senior And Senior Secured Notes [Member] VodafoneZiggo Senior And Senior Secured Notes Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Business combination, achieved in stages, preacquisition noncontrolling equity interest in acquiree, percentage Business Combination, Achieved in Stages, Preacquisition Noncontrolling Equity Interest in Acquiree, Percentage Business Combination, Achieved in Stages, Preacquisition Noncontrolling Equity Interest in Acquiree, Percentage Schedule of Investments [Table] Schedule of Investments [Table] VodafoneZiggo Acquisition VodafoneZiggo Acquisition [Member] VodafoneZiggo Acquisition 2029 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three Amortization of deferred financing costs and non-cash interest Amortization of Debt Issuance Costs and Discounts Cash paid for investments Payments to Acquire Interest in Subsidiaries and Affiliates Percentage of ownership interest Subsidiary, Ownership Percentage, Parent Impairment charge Disposal Group, Including Discontinued Operation, Impairment Charge Disposal Group, Including Discontinued Operation, Impairment Charge Total debt before deferred financing costs, discounts and premiums Carrying amount Total debt maturities Balance at January 1 Balance at September 30 Long-Term Debt, Gross Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Subscription revenue Mobile Subscription [Member] Mobile Subscription [Member] Weighted average common shares outstanding (diluted EPS computation) (in shares) Weighted Average Number of Shares Outstanding, Diluted Interest acquired (in percent) Interest acquired Business Combination, Voting Equity Interest Acquired, Percentage Entity Emerging Growth Company Entity Emerging Growth Company Underlying Security Market Price Change Underlying Security Market Price Change, Percent Proceeds from lines of credit Proceeds from Lines of Credit Property and equipment, net (notes 8 and 10) Total property and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Total Proceeds (Repayments) From Derivatives, Continuing Operations Proceeds (Repayments) From Derivatives, Continuing Operations Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Less: present value discount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Transaction consideration reduction settlement amount Disposal Group Including Discontinued Operation, Transaction Consideration, Amount Disposal Group Including Discontinued Operation, Transaction Consideration, Amount Total capital expenditures, net Payments for Capital Improvements Treasury shares, at cost Treasury Stock, Common [Member] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Total payments Lessee, Operating Lease, Liability, to be Paid Egg Power Capex Facility Egg Power Capex Facility [Member] Egg Power Capex Facility Total decrease to borrowing costs Impact Of Derivative Instruments On Borrowing Costs, Percent Increase (Decrease) Impact Of Derivative Instruments On Borrowing Costs, Percent Increase (Decrease) Collateral Held [Domain] Collateral Held [Domain] Reduction of annual lease fees Reduction Of Annual Lease Fees Reduction Of Annual Lease Fees All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Related party note receivable rate Receivable with Imputed Interest, Effective Yield (Interest Rate) Cash and cash equivalents and restricted cash: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Percentage of net present value, cost savings Percentage Of Net Present Value, Cost Savings Percentage Of Net Present Value, Cost Savings Other Other Debt [Member] Other Debt [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Segment Reporting Segment Reporting [Text Block] Minimum Minimum [Member] Total — fair value Investments, Fair Value Disclosure Fair Value, Assets and Liabilities (Net) Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Programming commitments Programming Commitments [Member] Programming Commitments [Member] Effect of exchange rate changes on cash and cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Share price appreciation percent Share-based Compensation Arrangement By Share-based Payment Award, Share Price Appreciation, Percent Share-based Compensation Arrangement By Share-based Payment Award, Share Price Appreciation, Percent Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Business combination, achieved in stages, preacquisition equity interest in acquiree, percentage Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Percentage Business Combination [Line Items] Business Combination [Line Items] Exercise Price Award Exercise Price Other Sunrise Holding [Member] Sunrise Holding Gain recognized on previously held equity interest Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Remeasurement, Gain Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Fair value adjustment Debt Instrument, Fair Value Adjustment Due To Acquisition, Amount Debt Instrument, Fair Value Adjustment Due To Acquisition, Amount Proceeds received from the sale and maturities of debt securities Proceeds from Sale of Debt Securities, Available-for-Sale Debt (excluding vendor financing) Repayment of debt Repayments of Long-Term Debt Deferred financing costs, discounts and premiums, net Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Liability: Derivative Liability [Abstract] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Equity Method Investments Other Other Subsidiaries [Member] Relating to Other Subsidiaries not otherwise identified. Equity Component [Domain] Equity Component [Domain] Realized and unrealized gains due to changes in fair values of certain investments, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Measurement Input Type [Domain] Measurement Input Type [Domain] Foreign currency forward and option contracts Foreign Exchange Contract [Member] Liberty Global Liberty Global [Member] Liberty Global Adoption Date Trading Arrangement Adoption Date Total consideration Disposal Group, Including Discontinued Operation, Consideration Counterparty Name [Domain] Counterparty Name [Domain] Wyre DSR Facility Wyre DSR Facility [Member] Wyre DSR Facility Non-operating income (expense) Nonoperating Income (Expense) Other investments Equity Securities, FV-NI, Current Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Operating leases Present value of lease payments Operating Lease, Liability Weighted average remaining life Derivative, Average Remaining Maturity Disposed interest percentage Disposal Group, Including Discontinued Operation, Disposed Interest Disposal Group, Including Discontinued Operation, Disposed Interest Options outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Finance lease obligations Finance leases Present value of lease payments Finance Lease, Liability Other financing activities, net Proceeds from (Payment for) Other Financing Activity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Selling, general and administrative (SG&A) (notes 10 and 13) Selling, General and Administrative Expense Business Combination [Domain] Business Combination [Domain] Mobile Services Mobile Services [Member] Mobile Services [Member] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Residential Service Residential Service [Member] Residential Service [Member] RSUs Restricted Stock Units (RSUs) [Member] Weighted Average Weighted Average [Member] All Adjustments to Compensation All Adjustments to Compensation [Member] Central and other Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Net cash received (paid) related to derivative instruments Financing activities Payments for (Proceeds from) Derivative Instrument, Financing Activities Business Combination [Axis] Business Combination [Axis] Non-subscription revenue Business to Business Non-Subscription [Member] Business to Business Non-Subscription [Member] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Condensed Consolidated Statement of Operations Income Statement [Abstract] Liberty Global shareholders: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Intersegment Intersegment Eliminations [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Schedule of Intangible Assets Subject to Amortization, Net Intangible Asset, Finite-Lived [Table Text Block] Diluted earnings (loss) attributable to Liberty Global shareholders per share (in dollars per share) Business Combination, Pro Forma Information, Pro Forma Earnings Per Share, Diluted City Area Code City Area Code Total property and equipment, gross Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Variable charges Variable Charges [Member] Variable Charges Name Forgone Recovery, Individual Name AtlasEdge JV AtlasEdge JV [Member] AtlasEdge JV Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Foreign exchange (loss) gains Effective Income Tax Rate Reconciliation, Foreign Currency Translation, Amount Effective Income Tax Rate Reconciliation, Foreign Currency Translation, Amount Effective income tax rate reconciliation, derecognition of litigation-related receivable, percent Effective Income Tax Rate Reconciliation, Derecognition of Litigation-related Receivable, Percent Effective Income Tax Rate Reconciliation, Derecognition of Litigation-related Receivable, Percent Entity [Domain] Entity [Domain] Herndon Topco Herndon Topco [Member] Herndon Topco Schedule of Other Share Based Compensation Activity Share-Based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block] Other Other [Member] Other Lionsgate Studios Corp. (Lionsgate) Lionsgate Lionsgate Studios Corp. [Member] Lionsgate Studios Corp. Schedule of Cash Received (Paid) Related to Derivative Instruments Statement of Cash Flows Location Schedule Of Cash Received Paid Related To Derivative Instruments Statement Of Cash Flows Location [Table Text Block] Schedule Of Cash Received Paid Related To Derivative Instruments Statement Of Cash Flows Location Share-based compensation expense Share-based compensation expense Share-Based Payment Arrangement, Expense Other revenue Other Category [Member] Other Category [Member] Total investments Investments Class C Common Class C [Member] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Gains included in net earnings Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings [Abstract] Cash and cash equivalents Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash provided (used) by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Changes in operating assets and liabilities, net of the effects of acquisitions and dispositions Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital Non-performance-based incentive awards Non-Performance Based Share-Based Awards [Member] Non-Performance Based Share-Based Awards [Member] Schedule of Pro Forma Information Business Combination, Pro Forma Information [Table Text Block] Adjustments to reconcile net earnings (loss) to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] 2029 Long-Term Debt, Maturity, Year Three Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Net Investment Income [Line Items] Net Investment Income [Line Items] Financial Instruments [Domain] Financial Instruments [Domain] Performance measures percentage of segment revenue and operating cash flow presented Performance Measures Percentage Of Reportable Segment Revenue And Operating Cash Flow Presented Performance Measures Percentage Of Reportable Segment Revenue And Operating Cash Flow Presented Finance lease expense: Finance Leases, Cost [Abstract] Finance Leases, Cost [Abstract] VodafoneZiggo JV VodafoneZiggo JV VodafoneZiggo JV [Member] VodafoneZiggo JV [Member] Total Derivative assets Total derivative instruments Derivative Asset Operating-related vendor financing additions Long Term Debt, Operating Related Additions Long Term Debt, Operating Related Additions Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Capital-related vendor financing additions Proceeds From Capital Related Vendor Financing Additions Proceeds From Capital Related Vendor Financing Additions Underlying Securities Award Underlying Securities Amount Comprehensive earnings attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Revenue Recognition and Related Costs Revenue from Contract with Customer [Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Other investing activities, net Payment for (Proceeds from) Other Investing Activity Weighted average discount rate, for operating leases Operating Lease, Weighted Average Discount Rate, Percent Number of reportable segments not disclosed flag Number Of Reportable Segments Not Disclosed Flag Number Of Reportable Segments Not Disclosed Flag Segment Reporting [Table] Segment Reporting [Table] Programming costs Programming And Copyright Costs Programming And Copyright Costs Revenue Business Combination, Acquiree's Revenue since Acquisition Date, Actual Schedule of Lease Expense and Cash Outflows from Operating and Finance Leases Lease, Cost [Table Text Block] Other current assets (notes 3 and 5) Other current assets Other Assets, Current Commitments and Contingencies Disclosure [Abstract] 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] Current Fiscal Year End Date Current Fiscal Year End Date Net cash proceeds Gain (Loss) on Disposition of Business Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivative [Line Items] Derivative [Line Items] Stock repurchased (in shares) Stock Repurchased During Period, Shares Operating lease payments Total Unrecorded Unconditional Purchase Obligation 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] Entity File Number Entity File Number Structured Notes Structured Notes [Member] Structured Notes Dividend distributions by subsidiaries to noncontrolling interest owners Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Schedule of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Measure: Measure [Axis] Number of subsidiaries with the most outstanding debt Number Of Subsidiaries With The Most Outstanding Debt Number Of Subsidiaries With The Most Outstanding Debt Equity Components [Axis] Equity Components [Axis] Other operating (notes 10 and 13) Other Cost and Expense, Operating Related party Related Party [Member] Net cash paid for taxes Income Tax Paid, after Refund Received AE Group Sàrl (AtlasEdge JV) AE Group Sàrl (AtlasEdge JV) [Member] AE Group Sàrl (AtlasEdge JV) Class A Common Class A [Member] Entity Interactive Data Current Entity Interactive Data Current Current portion Finance Lease, Liability, Current Net earnings attributable to noncontrolling interests Net earnings attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Total subscription revenue Total Subscription Revenue [Member] Total Subscription Revenue Entity Small Business Entity Small Business Comprehensive earnings (loss) attributable to Liberty Global shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Property, Plant, and Equipment [Line Items] Property, Plant, and Equipment [Line Items] Schedule of Reconciliation of the Beginning and Ending Balances of Assets and Liabilities Measured at Fair Value Using Significant Unobservable, or Level 3, Inputs Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Income tax contingency Income Tax Contingency [Member] Income Tax Contingency Other assets, net (notes 3, 6 and 10) Other Assets, Noncurrent 2029 Finance Lease, Liability, to be Paid, Year Three Document Type Document Type Cash paid in connection with VodafoneZiggo Acquisition Payments to Acquire Businesses, Net of Cash Acquired Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Details of end of period cash and cash equivalents and restricted cash: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Borrowings of debt Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Earnings (loss) before income taxes Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Commitments and contingencies (notes 6, 9, 10, 11 and 15) Commitments and Contingencies Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Fixed-line telephony Fixed-line Telephony [Member] Fixed-line Telephony Income Tax Contingency [Table] Income Tax Contingency [Table] Televisa Univision, Inc. (Televisa Univision) Televisa Univision Televisa Univision Holdings Inc [Member] Televisa Univision Holdings Inc Executive Category: Executive Category [Axis] VodafoneZiggo Credit Facility VodafoneZiggo Credit Facility [Member] VodafoneZiggo Credit Facility Counterparty Name [Axis] Counterparty Name [Axis] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Held by former Liberty Global employees Former Employees [Member] Former Employees [Member] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Telefonica Telefónica [Member] Telefónica PEO Name PEO Name Property, Plant and Equipment, Type [Axis] Long-Lived Asset, Class [Axis] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Total residential revenue Residential [Member] Residential [Member] Lease back initial term Sale Leaseback Transaction, Lease Term Other accrued and current liabilities (notes 6 and 10) Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Schedule of Realized and Unrealized Losses on Derivative Instruments Schedule Of Realized And Unrealized Gains Losses On Derivative Instruments [Table Text Block] Schedule Of Realized And Unrealized Gains Losses On Derivative Instruments [Table Text Block] Equity-related derivative instruments Equity Contract [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Comprehensive earnings (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Other long-term liabilities Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Share-based compensation expense Share-Based Payment Arrangement, Noncash Expense Other Other Share-Based Incentive Awards [Member] Other Share-Based Incentive Awards [Member] Total lease expense Lease, Cost Tax Period [Axis] Tax Period [Axis] Disposal Group Name [Axis] Disposal Group Name [Axis] Total lease liabilities Lease, Liability Lease, Liability Schedule of Fair Values of Derivative Instrument Assets and Liabilities Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Basic earnings (loss) attributable to Liberty Global shareholders per share (note 14) (in dollars per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Total current assets Assets, Current Insider Trading Arrangements [Line Items] Long-term portion Long-Term Debt, Excluding Current Maturities Valuation allowances, percent Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Short-term lease expense Short-Term Lease, Cost Award recipients earning percent Share-based Compensation Arrangement by Share-based Payment Award, Award Recipients Earning, Percent Share-based Compensation Arrangement by Share-based Payment Award, Award Recipients Earning, Percent Payment of financing costs and debt premiums Payments of Financing Costs Trade receivables, net (note 3) Accounts Receivable, after Allowance for Credit Loss, Current Counterparty credit risk Counterparty Credit Risk [Member] Counterparty Credit Risk [Member] 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] Unused borrowing capacity, amount Debt Instrument, Unused Borrowing Capacity, Amount Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Reclassification Reclassification, Comparability Adjustment [Policy Text Block] Held-for-sale or disposed of by sale Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations [Member] U.K. UNITED KINGDOM Term of transitional services Disposal Group, Term Of Transitional Services Disposal Group, Term Of Transitional Services Performance-based incentive awards Performance-Based Incentive Awards [Member] Performance-Based Incentive Awards [Member] Equity Awards Adjustments Equity Awards Adjustments [Member] Current assets held for sale Business Combination, Recognized Asset Acquired, Current Assets Held For Sale Business Combination, Recognized Asset Acquired, Current Assets Held For Sale Schedule of Unrecorded Purchase Obligation Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Interest acquired Business Combination, Measurement Input Business Combination, Measurement Input Long-term Derivative Liability, Noncurrent VMO2 JV VMEO2 JV [Member] VMEO2 JV O2 slovakia O2 Slovakia [Member] O2 Slovakia Current portion of debt and finance lease obligations (notes 9 and 10) Debt, Current Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Plan Name [Axis] Plan Name [Axis] Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] nexfibre JV nexfibre JV nexfibre JV [Member] nexfibre JV Other income, net Other income, net Other Nonoperating Income (Expense) Number of associations of municipalities Number Of Associations Of Municipalities Number Of Associations Of Municipalities Total Liberty Global shareholders Parent [Member] Equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Entity Address, Country Entity Address, Country Cross-currency swap Cross-Currency Swap 4 [Member] Cross-Currency Swap 4 [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Accumulated foreign currency translation losses Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses) Vendor financing additions associated with the VodafoneZiggo Acquisition Long Term Debt, Vendor Financing Additions Associated With Acquisition Long Term Debt, Vendor Financing Additions Associated With Acquisition Class of Stock [Domain] Class of Stock [Domain] Operating cash outflows from finance leases (interest component) Finance Lease, Interest Payment on Liability Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Foreign currency forward and option contracts Foreign currency forward and option contracts Foreign Exchange Forward [Member] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Percentage of amounts recovered Percentage Of Amounts Recovered Percentage Of Amounts Recovered Total finance lease expense Finance Lease, Cost Finance Lease, Cost Vodafone Group Inc. Vodafone Group Inc. [Member] Vodafone Group Inc. Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current 2031 Lessee, Operating Lease, Liability, to be Paid, Year Five Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Total purchase consideration Business Combination, Consideration Transferred Entity Filer Category Entity Filer Category Short-term investments Short-Term Investments Total residential mobile revenue Mobile Residential [Member] Mobile Residential [Member] Changes in current liabilities related to capital expenditures Increase (Decrease) In Current Liabilities Related To Capital Expenditures Increase (Decrease) In Current Liabilities Related To Capital Expenditures Deutsche Telekom Litigation Deutsche Telekom Litigation [Member] Deutsche Telekom Litigation [Member] Finance leases Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Realized and unrealized gains (losses) on derivative instruments, net (note 6) Realized and unrealized losses (gains) on derivative instruments, net Total Realized and unrealized gains (losses) on derivative instruments, net Gain (Loss) on Derivative Instruments, Net, Pretax Luxembourg LUXEMBOURG 2030 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four Entity Address, Address Line Two Entity Address, Address Line Two Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Net earnings (loss) Net earnings (loss) Net (loss) earnings Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Related entities combined into single segment (in segments) Business Combination, Related Entities Combined Into A Single Reportable Segment, Combined Amount Business Combination, Related Entities Combined Into A Single Reportable Segment, Combined Amount Current assets: Assets, Current [Abstract] Interest rate caps Interest Rate Cap [Member] Total Derivative instruments Derivative Liability Revenue (in millions) Business Combination, Pro Forma Information, Pro Forma Revenue Acquisitions and Dispositions [Abstract] Acquisitions and Dispositions [Abstract] Acquisitions and Dispositions [Abstract] Entity Address, Address Line One Entity Address, Address Line One Addition to ROU assets associated with operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Income tax benefit (note 11) Income tax benefit Income Tax Expense (Benefit) Telenet Revolving Facility Telenet Revolving Facility [Member] Telenet Revolving Facility [Member] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Long-term operating lease liabilities Business Combination Recognized Liability Assumed, Operating Lease Liabilities, Noncurrent Business Combination Recognized Liability Assumed, Operating Lease Liabilities, Noncurrent Intangible assets subject to amortization, net (note 8) Other Intangible Assets, Net Deferred tax liabilities Business Combination, Recognized Liability Assumed, Deferred Tax Liability Schedule of Investments by Accounting Method Schedule Of Investments By Accounting Method [Table Text Block] Schedule of Investments by Accounting Method [Table Text Block] Accounting Changes and Recent Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Operating-related vendor financing additions Proceeds From Operating Related Vendor Financing Additions Proceeds From Operating Related Vendor Financing Additions Statement [Table] Statement [Table] Elimination of intercompany Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Reduction in operating expenses Capitalized Contract Cost, Impairment Loss VM Ireland VM Ireland [Member] VM Ireland Received cash proceeds Proceeds from Short-Term Debt Distribution systems Distribution Systems [Member] Distribution Systems [Member] Remainder of 2026 Unrecorded Unconditional Purchase Obligation, to be Paid, Remainder of Fiscal Year Damages sought Loss Contingency, Damages Sought, Value Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] BERMUDA