Operating leases (a) Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Adjustments to reconcile earnings (loss) from continuing operations to net cash provided by operating activities of continuing operations: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Debt (excluding vendor financing) Repayments of Long-Term Debt Stock repurchase, remaining authorized amount Share Repurchase Program, Remaining Authorized, Amount Total debt and finance lease obligations Long-Term Debt and Lease Obligation, Including Current Maturities Income tax (benefit) expense Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Collateral Held [Domain] Collateral Held [Domain] Schedule of Other Share Based Compensation Activity Share-Based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block] Cover [Abstract] Cover [Abstract] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Total Net increase (decrease) Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Schedule of Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Interest acquired Business Acquisition, Percentage of Voting Interests Acquired Trading Symbol Trading Symbol Ownership percentage Equity Method Investment, Ownership 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 2030 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Five Comprehensive earnings (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest 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] Long-term debt and finance lease obligations (notes 9 and 10) Long-term debt and finance lease obligations Long-Term Debt and Lease Obligation Non-NEOs Non-NEOs [Member] Lease liabilities: Lease Liability [Abstract] Lease Liability [Abstract] Distribution systems Distribution Systems [Member] Distribution Systems [Member] Trade receivables, allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Position [Axis] Position [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] 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] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Earnings (loss) from continuing operations Earnings (loss) from continuing operations Earnings (loss) from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation [Line Items] Fair Value Measurements Fair Value Disclosures [Text Block] Award Timing Disclosures [Line Items] Investment, Name [Domain] Investment, Name [Domain] Nexfibre Networks Limited (nexfibre JV) Nexfibre Networks Limited (nexfibre JV) [Member] Nexfibre Networks Limited (nexfibre JV) Instruments accounted for under measurement alternative Instruments Accounted For Under Measurement Alternative [Member] Instruments Accounted For Under Measurement Alternative Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Plan Name [Domain] Plan Name [Domain] Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Other assets, net (notes 3, 6 and 10) Other Assets, Noncurrent Leases [Abstract] Leases [Abstract] Gross carrying amount Finite-Lived Intangible Assets, Gross Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Operating Segments Operating Segments [Member] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Secured Debt Secured Debt [Member] Adjustments due to changes in subsidiaries’ equity and other, net Stockholders' Equity, Other Award Timing Method Award Timing Method [Text Block] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Weighted average remaining lease term for finance leases Finance Lease, Weighted Average Remaining Lease Term Insider Trading Policies and Procedures [Line Items] Adjustment to Compensation, Amount Adjustment to Compensation Amount Compensation Amount Outstanding Recovery Compensation Amount Disposal Group Classification [Axis] Disposal Group Classification [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] Entity Small Business Entity Small Business Company Selected Measure Amount Company Selected Measure Amount Tabular List, Table Tabular List [Table Text Block] Significant unobservable inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Excluded potentially dilutive employee share-based incentive awards (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Less: present value discount Finance Lease, Liability, Undiscounted Excess Amount Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Class C Common Class C [Member] Credit Facility [Domain] Credit Facility [Domain] Sunrise Spinoff Sunrise Spinoff [Member] Sunrise Spinoff 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] Goodwill (note 8) Goodwill beginning balance Goodwill 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Other Financing Activities Comprehensive earnings (loss) attributable to Liberty Global shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Accrued income taxes Accrued Income Taxes, Current Weighted average discount rate, for finance leases Finance Lease, Weighted Average Discount Rate, Percent Repayments of lines of credit Repayments of Lines of Credit Government bonds Municipal Bonds [Member] 2026 Finance Lease, Liability, to be Paid, Year One Award Type [Axis] Award Type [Axis] Plume Design, Inc. (Plume) Plume Design, Inc. (Plume) [Member] Plume Design, Inc. (Plume) Corporate debt securities Corporate Debt Securities [Member] Foreign currency translation adjustments and other Goodwill, Foreign Currency Translation Gain (Loss) Basic earnings (loss) attributable to Liberty Global shareholders per share (note 14): Earnings Per Share, Basic [Abstract] Residential Service Residential Service [Member] Residential Service [Member] Fixed fees Debt Instrument, Fee Total liabilities Liabilities Noncontrolling interests Equity, Attributable to Noncontrolling Interest 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 Accrued capital expenditures Accrued Capital Expenditures, Current Accrued Capital Expenditures, Current Common stock, nominal value (in dollars per share) Common Stock, Par or Stated Value Per Share Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Expiration Date Trading Arrangement Expiration Date Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Net cash provided by operating activities of continuing operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Current portion Operating Lease, Liability, Current Total Shareholder Return Amount Total Shareholder Return Amount Non-subscription revenue Non-subscription Revenue [Member] Non-subscription Revenue Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Netherlands and Belgium Netherlands and Belgium [Member] Netherlands and Belgium Share-based compensation arrangement by share-based payment award, cap, percent Share-based Compensation Arrangement by Share-based Payment Award, Cap, Percent Share-based Compensation Arrangement by Share-based Payment Award, Cap, Percent 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 Broadband internet Broadband Internet [Member] Broadband Internet Business combination, acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt Unused borrowing capacity, amount Available to borrow, upon completion of the relevant compliance reporting requirements Debt Instrument, Unused Borrowing Capacity, Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accumulated depreciation Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Weighted average common shares outstanding (diluted EPS computation) (in shares) Weighted Average Number of Shares Outstanding, Diluted MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Total Liberty Global shareholders Equity, Attributable to Parent Finance lease expense: Finance Leases, Cost [Abstract] Finance Leases, Cost [Abstract] 2029 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four Litigation Case [Axis] Litigation Case [Axis] Revenue Disposal Group, Including Discontinued Operation, Revenue Schedule of Changes in Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] Derivative instruments (note 6) Current Derivative Asset, Current Debt instrument, proportion of debt associated with return Debt Instrument, Proportion Of Debt Associated With Return Debt Instrument, Proportion Of Debt Associated With Return Selling, general and administrative (SG&A) (notes 10 and 13) Selling, General and Administrative Expense Interest Rate Caps Interest Rate Cap [Member] Net increase (decrease) in cash and 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[Member] VodafoneZiggo JV Receivable II Schedule of Performance Measures of our Reportable Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Beginning of period End of period Total cash and cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Amortized cost basis Debt Securities, Available-for-Sale, Amortized Cost Telenet Senior Secured Notes Telenet Senior Secured Notes [Member] Telenet Senior Secured Notes [Member] Liberty Global Parent Company [Member] Maximum Maximum [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Net carrying amount Finite-Lived Intangible Assets, Net Accounts payable Accounts Payable, Current Sunrise Holding Revolving Facility Sunrise Holding Revolving Facility [Member] Sunrise Holding Revolving Facility [Member] Net cash used by financing activities of continuing operations Net Cash Provided by (Used in) Financing Activities, Continuing Operations Total lease expense Lease, Cost Statistical Measurement [Axis] Statistical Measurement [Axis] 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 Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Earnings (loss) from continuing operations before income taxes Earnings (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Telenet Facility AU Telenet Facility AU [Member] Telenet Facility AU Name Outstanding Recovery, Individual Name Total residential fixed revenue Total Residential Fixed Revenue [Member] Total Residential Fixed Revenue Schedule of Classes of Assets and Liabilities Held for Sale Disposal Groups, Including Discontinued Operations [Table Text Block] Variable lease expense Variable Lease, Cost Title of Individual [Axis] Title and Position [Axis] Variable Charges Variable Charges [Member] Variable Charges Award Timing Predetermined Award Timing Predetermined [Flag] Investment, Name [Axis] Investment, Name [Axis] Customer relationships Customer Relationships [Member] Diluted earnings (loss) attributable to Liberty Global shareholders per share (in USD per share) Earnings Per Share, Diluted Interest Rate Collars Interest Rate Collar [Member] Interest Rate Collar Counterparty Name [Domain] Counterparty Name [Domain] Revenue Recognition and Related Costs Revenue from Contract with Customer [Policy Text Block] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Ownership [Axis] Ownership [Axis] 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 Foreign currency transaction gains (losses), net Foreign currency transaction losses (gains), net Gain (Loss), Foreign Currency Transaction, before Tax Percent of annual incentive compensation receivable in shares Shareholder Inventive Program, Percent of Annual Incentive Compensation Shareholder Inventive Program, Percent of Annual Incentive Compensation Condensed Consolidated Balance Sheet Statement of Financial Position [Abstract] ITV plc (ITV) ITV ITV - Subject to Re-Use Rights [Member] ITV - Subject to Re-Use Rights [Member] Non-subscription revenue Business to Business Non-Subscription [Member] Business to Business Non-Subscription [Member] Realized and unrealized losses 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 Net earnings (loss) Net earnings (loss) Net earnings Net earnings (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Income tax benefit (expense) (note 11) Income tax expense (benefit) Income Tax Expense (Benefit) Non-operating income (expense): Nonoperating Income (Expense) [Abstract] Notional amount Notional amount due from counterparty Derivative, Notional Amount Short-term, separately-managed accounts (SMAs) Debt Securities, Available-for-Sale, Current Investments Investment Holdings [Text Block] Total Derivative assets Derivative instruments Derivative Asset Total consolidated revenue Revenue (notes 4, 6, 7 and 19) Total Revenue from Contract with Customer, Excluding Assessed Tax Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Net cash provided (used) by investing activities Net Cash Provided by 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Earned on Loan Included in Income (Loss) from Equity Method Investments Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Legal Entity [Axis] Legal Entity [Axis] Deferred liabilities Deferred License Fees Deferred License Fees Losses included in net earnings Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings [Abstract] Counterparty Credit Risk Counterparty Credit Risk [Member] Counterparty Credit Risk [Member] CPE Customer Premises Equipment [Member] Customer Premises Equipment [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Other Other, net Other Unnamed Investment [Member] Other Unnamed Investment [Member] Non-subscription revenue Mobile Non-Subscription [Member] Mobile Non-Subscription [Member] Accumulated unrealized gains (losses) Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax Revenue, remaining performance obligation, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Financial Instruments [Domain] Financial Instruments [Domain] Percentage of amounts recovered Percentage of Amounts Recovered Percentage of Amounts Recovered LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Valuation allowances, percent Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Restatement Determination Date Restatement Determination Date Long-term, SMAs Debt Securities, Available-for-Sale, Noncurrent Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation [Table] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] 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 Operating leases Operating Lease, Right-of-Use Asset Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Options outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number 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 Total cash outflows from operating and finance leases Operating and Finance Lease, Payments Operating and Finance Lease, Payments Support equipment, buildings and land Support Equipment, Buildings and Land [Member] Support Equipment, Buildings and Land [Member] Property, Plant and Equipment [Abstract] Continuing operations Income Taxes Paid, Continuing Operations Income Taxes Paid, Continuing Operations Earnings (Loss) per Share Earnings Per Share [Text Block] Operating costs and expenses (exclusive of depreciation and amortization, shown separately below): Costs and Expenses [Abstract] Fair Value Recurring Basis Unobservable Input Reconciliation Net Derivative Asset Liability Gain Loss Statement Of Income Extensible List Not Disclosed Flag Fair Value Recurring Basis Unobservable Input Reconciliation Asset Gain Loss Statement Of Income Extensible List Not Disclosed Flag Fair Value Recurring Basis Unobservable Input Reconciliation Asset Gain Loss Statement Of Income Extensible List Not Disclosed Flag Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Other debt securities Other Debt Obligations [Member] Segments [Domain] Segments [Domain] Schedule of Maturities of Financing Lease Liabilities Finance Lease, Liability, to be Paid, Maturity [Table 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] Discontinued operations (in USD per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share PEO PEO [Member] Total reportable segment revenue Revenue From Contract With Customer, Excluding Assessed Tax, Including Nonconsolidated Items Revenue From Contract With Customer, Excluding Assessed Tax, Including Nonconsolidated Items Name Trading Arrangement, Individual Name Telenet Credit Facility Telenet Credit Facility [Member] Telenet Credit Facility [Member] Financing activities Payments for (Proceeds from) Derivative Instrument, Financing Activities 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) Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Disposal Group Name [Axis] Disposal Group Name [Axis] Share of results of affiliates, net (note 5) Share of results of affiliates, net Equity method investment Income (Loss) from Equity Method Investments Treasury shares, at cost Treasury Stock, Common, Value Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Share repurchase program, minimum repurchase requirement, percentage Share Repurchase Program, Minimum Repurchase Percentage Share Repurchase Program, Minimum Repurchase Percentage 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] Structured notes Structured Notes [Member] Structured Notes Non-deductible net losses from investments Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Amount Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Local Phone Number Local Phone Number Central and Other Central and Other [Member] Central and Corporate [Member] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Cash paid for investments Payments to Acquire Interest in Subsidiaries and Affiliates Schedule of Equity Method Investments [Table] Equity Method Investment [Table] 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 and Debt, Net Realized And Unrealized Gains (Losses) Due To Changes In Fair Values of Certain Investments and Debt, Net PEO Total Compensation Amount PEO Total Compensation Amount Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Income Statement Location [Axis] Statement of Income Location, Balance [Axis] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Common shares Common Stock [Member] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Discontinued operations Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Disposal Group, Including Discontinued Operations Non-performance based incentive awards Non-Performance Based Share-Based Awards [Member] Non-Performance Based Share-Based Awards [Member] Line of Credit Line of Credit [Member] Segment Reporting [Abstract] Entity Central Index Key Entity Central Index Key Damages sought Loss Contingency, Damages Sought, Value Value added tax, vendor financing arrangement Value Added Tax, Vendor Financing Arrangement Value Added Tax, Vendor Financing Arrangement Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Cash paid for amounts included in the measurement of lease liabilities: Cash Flow, Lessee [Abstract] Cash Flow, Lessee [Abstract] CANAL+ Polska S.A (CANAL+ Polska). CANAL+ Polska S.A. [Member] CANAL+ Polska S.A. 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That May Be Banked Share-based Compensation Arrangement by Share-based Payment Award, Percent Of Awards That May Be Banked 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 Class B Common Class B [Member] Title Trading Arrangement, Individual Title Consolidated Entities [Axis] Consolidated Entities [Axis] Unrecognized tax benefits Unrecognized Tax Benefits Comprehensive earnings attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Position [Domain] Position [Domain] City Area Code City Area Code Income tax benefit Discontinued Operation, Tax Effect of Discontinued Operation Current liabilities: Liabilities, Current [Abstract] Discontinued operations Income Taxes Paid, Discontinued Operations Income Taxes Paid, Discontinued Operations Investments Investments [Member] Licenses Licenses [Member] Licenses Disposal Group Classification [Domain] Disposal Group Classification [Domain] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Discontinued operation after disposal, revenue Discontinued Operation, Intra-Entity Amounts, Discontinued Operation after Disposal, Revenue Equity-related derivative instruments Equity-related derivative instruments Equity Contract [Member] Capital-related vendor financing additions Proceeds From Capital Related Vendor Financing Additions Proceeds From Capital Related Vendor Financing Additions Assets: Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] Repurchases of Liberty Global common shares Payments for Repurchase of Common Stock Long-term portion Long-Term Debt, Excluding Current Maturities Schedule of Segment Reporting Information, 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be Paid, Year Five Total residential mobile revenue Mobile Residential [Member] Mobile Residential [Member] Amendment Flag Amendment Flag Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Depreciation and amortization Finance Lease, Right-of-Use Asset, Amortization Debt Debt Disclosure [Text Block] Collateral Held [Axis] Collateral Held [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Debt instrument, face amount Debt Instrument, Face Amount Long-term Derivative Liability, Noncurrent Entity Address, Postal Zip Code Entity Address, Postal Zip Code Options and SARs Options and Share Appreciation Rights (SARs) [Member] Options and Share Appreciation Rights (SARs) [Member] Interest Rate Swap Interest Rate Swap [Member] Deutsche Telekom Litigation Deutsche Telekom Litigation [Member] Deutsche Telekom Litigation [Member] Principal Transaction Revenue [Line Items] Principal Transaction Revenue [Line Items] Accrued interest Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss Discontinued operations (in USD per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Schedule of Investments [Table] Schedule of Investments [Table] Other investing activities, net Payments for (Proceeds from) Other Investing Activities Certificates of deposit Certificates of Deposit [Member] 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] Total Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Losses on debt extinguishment, net Losses on debt extinguishment, net Gain (Loss) on Extinguishment of Debt 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] Cash received from the sale of investments Proceeds from Sale, Maturity and Collection of Investments Depreciation and amortization Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Equity-related derivative instruments Equity-Related Derivative Instruments [Member] Equity-Related Derivative Instruments [Member] 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 Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Total ROU assets Lease Asset Lease Asset Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] 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 Principal payments on finance leases Financing cash outflows from finance leases (principal component) Finance Lease, Principal Payments Telefonica Telefónica [Member] Telefónica Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Schedule of Stock by Class [Table] Stock, Class of Stock [Table] 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] Total assets Assets Programming and other direct costs of services (note 10) Programming and other direct costs of services Cost of Goods and Services Sold Percentage of share based compensation expense Equity Method Investment, Percentage Of Share Based Compensation Expense Equity Method Investment, Percentage Of Share Based Compensation Expense Other long-term liabilities (notes 3 and 6) Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Commitments and contingencies (notes 6, 9, 10, 11 and 15) Commitments and Contingencies Termination Date Trading Arrangement Termination Date 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] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Two 2026 Long-Term Debt, Maturity, Year One VM Ireland Revolving Facility VM Ireland Revolving Facility [Member] VM Ireland Revolving Facility Debt Instrument [Axis] Debt Instrument [Axis] Net earnings (loss) attributable to Liberty Global shareholders Net Income (Loss) Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Revenue Revenue from Contract with Customer, Including Assessed Tax Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Entity File Number Entity File Number Operating activities Payments for (Proceeds from) Derivative Instrument, Operating Activities Payments for (Proceeds from) Derivative Instrument, Operating Activities Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Cash paid for interest: Interest Paid, Including Capitalized Interest, Operating and Investing Activities [Abstract] Consolidated Entities [Domain] Consolidated Entities [Domain] VodafoneZiggo JV Receivable I VodafoneZiggo JV Receivable I [Member] VodafoneZiggo JV Receivable I Non-controlling interests Noncontrolling Interest [Member] Condensed Consolidated Statement of Operations Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One VodafoneZiggo JV VodafoneZiggo JV VodafoneZiggo JV [Member] VodafoneZiggo JV [Member] Entity Address, Address Line Two Entity Address, Address Line Two Continuing operations Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Name Forgone Recovery, Individual Name Weighted average remaining lease term for operating leases Operating Lease, Weighted Average Remaining 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interests Net Income (Loss) Attributable to Noncontrolling Interest Liability: Derivative Liability [Abstract] Document Quarterly Report Document Quarterly Report 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 Other Other Immaterial Investments [Member] Other Immaterial Investments Litigation Case [Domain] Litigation Case [Domain] Accumulated other comprehensive earnings (loss), net of taxes Accumulated Other Comprehensive Income (Loss), Net of Tax Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Restricted cash included in other current assets and other assets, net Restricted Cash and Cash Equivalents Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Weighted average common shares outstanding (basic EPS computation) (in shares) Weighted Average Number of Shares Outstanding, Basic Related Party [Axis] Related and Nonrelated Parties [Axis] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Amortization of deferred financing costs and non-cash interest Amortization of Debt Issuance Costs and Discounts Weighted average remaining life Derivative, Average Remaining Maturity Name Awards Close in Time to MNPI Disclosures, Individual Name Interkabel Acquisition Interkabel Acquisition [Member] Interkabel Acquisition [Member] Entity Filer Category Entity Filer Category Loss Contingencies [Line Items] Loss Contingencies [Line Items] Long-term Derivative Asset, Noncurrent Investing activities Payments for (Proceeds from) Derivative Instrument, Investing Activities Statistical Measurement [Domain] Statistical Measurement [Domain] Total consolidated property and equipment additions Segment, Expenditure, Addition to Long-Lived Assets Schedule of Lease Expense and Cash Outflows from Operating and Finance Leases Lease, Cost [Table Text Block] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] UTB that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] VM Ireland VM Ireland [Member] VM Ireland 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 All Trading Arrangements All Trading Arrangements [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Realized and unrealized gains 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 Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Long-term Debt Long-Term Debt [Member] Operating income Disposal Group, Including Discontinued Operation, Operating Income (Loss) Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Derivative [Line Items] Derivative [Line Items] Total Income Taxes Paid, Net Purchase commitments Purchase Commitments [Member] Purchase Commitments [Member] Acquisitions and related adjustments Goodwill, Measurement Period Adjustment Class A Common Class A [Member] Lacework Lacework Inc. [Member] Lacework Inc. Equity Equity Method Investments Pay vs Performance Disclosure [Line Items] Total debt Long-term Debt Contractual Maturities Long-term Debt Contractual Maturities Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount nexfibre JV nexfibre JV [Member] nexfibre JV Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Derivative [Table] Derivative [Table] Income Tax Contingency [Table] Income Tax Contingency [Table] Schedule of Fair Values of Derivative Instrument Assets and Liabilities Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Other Performance Measure, Amount Other Performance Measure, Amount Leases Lessee, Operating Leases [Text Block] Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Operating lease expense Operating Lease, Cost Long-term operating lease liabilities (note 10) Long-term portion Operating Lease, Liability, Noncurrent Interest expense Finance Lease, Interest Expense Deferred revenue (note 3) Contract with Customer, Liability, Current Entity Tax Identification Number Entity Tax Identification Number Debt issued, percent of par Debt Instrument, Issuance Percent Of Par Debt Instrument, Issuance Percent Of Par Schedule of Finite-Lived Intangible Assets by Major Class [Table] Intangible Asset, Finite-Lived [Table] Schedule of Vendor Financing Obligations Schedule of Long-Term Debt Instruments [Table Text Block] Secured debt Secured Debt Other revenue Other Category [Member] Other Category [Member] SG&A expense Selling, General and Administrative Expenses [Member] Treasury shares, at cost Treasury Stock, Common [Member] Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Intersegment Eliminations Intersegment Eliminations [Member] Other operating (notes 10 and 13) Other Cost and Expense, Operating Plan Name [Axis] Plan Name [Axis] Thereafter Finance Lease, Liability, to be Paid, after Year Five Televisa Univision, Inc. (Televisa Univision) Televisa Univision Televisa Univision Holdings Inc [Member] Televisa Univision Holdings Inc Equity Components [Axis] Equity Components [Axis] 2027 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Two Total payments Finance Lease, Liability, to be Paid Other current assets (notes 3 and 5) Other assets, current Other Assets, Current Fair value SMAs Debt Securities, Available-for-Sale Net cash used by investing activities of discontinued operations Cash Provided by (Used in) Investing Activities, Discontinued Operations Balance of net assets at January 1, 2025 Balance of net assets at March 31, 2024 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Related party note receivable rate Receivable with Imputed Interest, Effective Yield (Interest Rate) Operating costs and expenses Operating expenses Costs and Expenses Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Net cash used by financing activities of discontinued operations Cash Provided by (Used in) Financing Activities, Discontinued Operations 2028 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three Diluted earnings (loss) attributable to Liberty Global shareholders per share (note 14): Earnings Per Share, Diluted [Abstract] Mobile Services Mobile Services [Member] Mobile Services [Member] Geographical [Axis] Geographical [Axis] 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 2030 Lessee, Operating Lease, Liability, to be Paid, Year Five Weighted Average Weighted Average [Member] 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] Loss contingency accrual Loss Contingency Accrual Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Telenet Overdraft Facility Telenet Overdraft Facility [Member] Telenet Overdraft Facility [Member] U.K. And Netherlands U.K. And Netherlands [Member] U.K. And Netherlands Weighted average interest rate Debt, Weighted Average Interest Rate Other investments Equity Securities, FV-NI, Current Operating-related vendor financing additions Long Term Debt, Operating Related Additions Long Term Debt, Operating Related Additions Current assets: Assets, Current [Abstract] Consolidation Items [Axis] Consolidation Items [Axis] Net earnings (loss) from continuing operations attributable to Liberty Global shareholders Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Income Tax Contingency Income Tax Contingency [Member] Income Tax Contingency Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Product and Service [Domain] Product and Service [Domain] Short-term lease expense Short-Term Lease, Cost Goodwill [Roll Forward] Goodwill [Roll Forward] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Debt Covenant [Domain] Debt Covenant [Domain] Debt Covenant [Domain] Reportable Segment Reportable Segment [Member] Reportable Segment Security Exchange Name Security Exchange Name Formula E Acquisition Formula E Acquisition [Member] Formula E Acquisition Related Party Transaction [Domain] Related Party Transaction [Domain] Interest accrued Increase (Decrease) in Accrued Interest Receivable, Net Excess of carrying amount over proportional share in investees net assets Equity Method Investment, Difference Between Carrying Amount and Underlying Equity Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Schedule of Debt Securities Debt Securities, Available-for-Sale [Table Text Block] Basic earnings from continuing operations attributable to Liberty Global shareholders per share (in dollars per share) Business Acquisition, Pro Forma Income (Loss) From Continuing Operations, Net Of Tax, Basic Business Acquisition, Pro Forma Income (Loss) From Continuing Operations, Net Of Tax, Basic ROU assets associated with finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Common stock, issued (in shares) Common Stock, Shares, Issued Entity [Domain] Entity [Domain] Discontinued operations Interest Paid, Discontinued Operations Other commitments Other Commitments [Member] Other Commitments [Member] Schedule of Unrecorded Purchase Obligation Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Total Derivative instruments: Derivative Liability Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Available to borrow Debt Instrument, Unused Borrowing Capacity Amount, Under Covenants Debt Instrument, Unused Borrowing Capacity Amount, Under Covenants Telenet Revolving Facility Telenet Revolving Facility [Member] Telenet Revolving Facility [Member] Total subscription revenue Total Subscription Revenue [Member] Total Subscription Revenue Video Video [Member] Video Continuing operations Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Continuing Operations Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Investments and receivables at fair value Investments And Related Notes Receivable, Fair Value Disclosure Investments And Related Notes Receivable, Fair Value Disclosure Total B2B revenue Business to Business [Member] Business to Business [Member] Related Party Related Party [Member] Warner Bros. Discovery, Inc. Warner Bros. Discovery, Inc. [Member] Warner Bros. Discovery, Inc. Interest expense Interest Expense, Nonoperating Deferred income tax expense (benefit) Deferred Income Tax Expense (Benefit) Total finance lease expense Finance Lease, Cost Finance Lease, Cost Schedule of Business Acquisition, Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Entity Address, Country Entity Address, Country Current portion of debt and finance lease obligations (notes 9 and 10) Debt, Current Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Trade receivables, net (note 3) Accounts Receivable, after Allowance for Credit Loss, Current Percentage of ownership interest Subsidiary, Ownership Percentage, Parent Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Total carrying amount of debt Long-Term Debt Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Long-lived Assets Long Lived Assets Disclosure [Text Block] The entire disclosure for long-lived assets. Thereafter Long-Term Debt, Maturity, after Year Five Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Acquisitions and Dispositions Mergers, Acquisitions and Dispositions Disclosures [Text Block] Subscription revenue Business to Business Subscription [Member] Business to Business Subscription [Member] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Commercial paper Commercial Paper [Member] Investment Income [Table] Investment Income [Table] Realized and unrealized gains (losses) on derivative instruments, net (note 6) Realized and unrealized losses (gains) on derivative instruments, net Realized and unrealized gains (losses) on derivative instruments, net Gain (Loss) on Derivative Instruments, Net, Pretax Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Held by former Liberty Global employees Former Employees [Member] Former Employees [Member] Average price paid per share (in dollars per share) Shares Acquired, Average Cost Per Share Schedule of Investments by Accounting Method Schedule of Investments by Accounting Method [Table Text Block] Schedule of Investments by Accounting Method [Table Text Block] 2028 Finance Lease, Liability, to be Paid, Year Three Vodafone Collar Loan Vodafone Collar Loan [Member] Vodafone Collar Loan Foreign exchange (loss) gains Effective Income Tax Rate Reconciliation, Foreign Currency Translation, Amount Effective Income Tax Rate Reconciliation, Foreign Currency Translation, Amount Total Liberty Global shareholders Parent [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 Deferred revenue Contract with Customer, Liability Accounting Policies [Abstract] VMO2 JV VMEO2 JV [Member] VMEO2 JV Assets acquired under capital-related vendor financing arrangements Assets Acquired Under Capital-Related Vendor Financing Arrangements Assets Acquired Under Capital-Related Vendor Financing Arrangements Total Proceeds (Repayments) From Derivatives, Continuing Operations Proceeds (Repayments) From Derivatives, Continuing Operations Current Fiscal Year End Date Current Fiscal Year End Date Less: present value discount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Short-term investments (measured at fair value on a recurring basis) (note 5) Short-term investments Short-Term Investments PEO Name PEO Name Vodafone - subject to re-use rights Vodafone Vodafone [Member] Vodafone Award Type [Domain] Award Type [Domain] Country Region Country Region Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Non-PEO NEO Non-PEO NEO [Member] Total investments Investments, Fair Value Disclosure Additional paid-in capital Additional Paid-in Capital [Member] Long-term portion Finance Lease, Liability, Noncurrent Class of Stock [Line Items] Class of Stock [Line Items] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [Axis] Conversion ratio Disposal Group, Including Discontinued Operations, Conversion Ratio Disposal Group, Including Discontinued Operations, Conversion Ratio Cash and cash equivalents and restricted cash included in current and long-term assets of discontinued operations Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations Title of Individual [Domain] Title and Position [Domain] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] 2029 Finance Lease, Liability, to be Paid, Year Four Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Schedule of Weighted Average Shares Outstanding Schedule of Weighted Average Number of Shares [Table Text Block] Name Measure Name Entity Interactive Data Current Entity Interactive Data Current Net loss attributable to Liberty Global shareholders Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Proceeds from sale of debt securities Proceeds from Sale of Debt Securities, Available-for-Sale Thereafter Unrecorded Unconditional Purchase Obligation, to be Paid, after Year Five Remainder of 2025 Unrecorded Unconditional Purchase Obligation, to be Paid, Remainder of Fiscal Year Schedule of Assets and Liabilities Measured at Fair Value Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Debt Covenant, Scenario 1 Debt Covenant, Scenario 1 [Member] Debt Covenant, Scenario 1 Share-based compensation expense Share-Based Payment Arrangement, Noncash Expense Long-term investments at fair value Equity Securities, FV-NI and without Readily Determinable Fair Value Schedule of Lease Balances Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Realized net gains (losses) Debt Securities, Realized Gain (Loss) Realized and unrealized losses on derivative instruments, net Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings Stated interest percentage Debt Instrument, Interest Rate, Stated Percentage Central and Other Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Vendor Financing Obligation [Roll Forward] Vendor Financing Obligation [Roll Forward] Vendor Financing Obligation Income tax examination, liability (refund) adjustment from settlement with taxing authority Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority Non-operating income (expense) Nonoperating Income (Expense) Total capital expenditures, net Payments for Capital Improvements Discontinued operations Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations Effective tax rate Effective Income Tax Rate Reconciliation, Percent Operating income (loss) Operating Income (Loss) Tax Year 2018 Tax Year 2018 [Member] Valuation allowances Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Other Other Share-Based Incentive Awards [Member] Other Share-Based Incentive Awards [Member] 2025 (remainder of year) Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Total liabilities and equity Liabilities and Equity Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fixed-line telephony Fixed-line Telephony [Member] Fixed-line Telephony Current Derivative Liability, Current Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] 2027 Finance Lease, Liability, to be Paid, Year Two Acquisitions and Dispositions [Abstract] Acquisitions and Dispositions [Abstract] Acquisitions and Dispositions [Abstract] Loss from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Current portion of debt and finance lease obligations Long-Term Debt and Lease Obligation, Current Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Number of subsidiaries with the most outstanding debt Number Of Subsidiaries With The Most Outstanding Debt Number Of Subsidiaries With The Most Outstanding Debt Total residential revenue Residential [Member] Residential [Member] Other Other Stock Plan [Member] Other Stock Plan Schedule of Maturities of Debt and Capital Lease Obligations Schedule of Maturities of Long-Term Debt [Table Text Block] Addition to ROU assets associated with operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Performance-based incentive awards Performance-Based Incentive Awards [Member] Performance-Based Incentive Awards [Member] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Individual: Individual [Axis] Accumulated other comprehensive earnings, net of taxes AOCI Attributable to Parent [Member] Net cash provided (used) by investing activities of continuing operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations Product and Service [Axis] Product and Service [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Statement [Line Items] Statement [Line Items] Schedule of Property and Equipment Property, Plant and Equipment [Table Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Consideration transferred Business Combination, Consideration Transferred Term Derivative, Term of Contract Deferred financing costs, discounts and premiums, net Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Number of associations of municipalities Number Of Associations Of Municipalities Number Of Associations Of Municipalities Minimum Minimum [Member] Adoption Date Trading Arrangement Adoption Date Available to loan or distribute Financing Receivable, Available To Distribute Financing Receivable, Available To Distribute UNITED KINGDOM UNITED KINGDOM Percentage of legal and other third party, fees Percentage of Legal and Other Third Party, Fees Percentage of Legal and Other Third Party, Fees Other operating expense Other Operating Income (Expense) [Member] Segments [Axis] Segments [Axis] 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] Tax Period [Axis] Tax Period [Axis] AtlasEdge JV AtlasEdge JV [Member] AtlasEdge JV Revenue (in millions) Business Acquisition, Pro Forma Revenue Derivative Instrument [Axis] Derivative Instrument [Axis] Total debt before deferred financing costs, discounts and premiums Total debt maturities Balance at January 1 Balance at March 31 Long-Term Debt, Gross Exercise Price Award Exercise Price Number of strategic platforms Number Of Strategic Platforms Number Of Strategic Platforms Arrangement Duration Trading Arrangement Duration Principal Transaction Revenue [Table] Principal Transaction Revenue [Table] VMO2 JV And VodafoneZiggo JV VMO2 JV And VodafoneZiggo JV [Member] VMO2 JV And VodafoneZiggo JV Trade Accounts Receivable Trade Accounts Receivable [Member] Leases Lessee, Finance Leases [Text Block] Continuing operations (in USD per share) Income (Loss) from Continuing Operations, Per Basic Share Liberty Global shareholders: Equity, Attributable to Parent [Abstract] Subsidiaries Subsidiaries [Member] Total investments Investments Investments and related notes receivable (including $3,054.5 million and $2,907.7 million, respectively, measured at fair value on a recurring basis) (note 5) Long-term investments Long-Term Investments Other Other Subsidiaries [Member] Relating to Other Subsidiaries not otherwise identified. Telenet Revolving Credit Facility B Telenet Revolving Credit Facility B [Member] Telenet Revolving Credit Facility B Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-deductible net losses from investments, percent Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Percent Finance lease obligations Finance leases Present value of lease payments Finance Lease, Liability All Individuals All Individuals [Member] Income Tax Disclosure [Abstract] 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 Entities [Table] Entities [Table] Other income, net Other income, net Other Nonoperating Income (Expense) Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Assets acquired under finance leases Lease Obligation Incurred Debt Covenant [Axis] Debt Covenant [Axis] Debt Covenant Held by Liberty Global employees: Employees [Member] Employees [Member] Details of end of period cash and cash equivalents and restricted cash: Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract] 2025 (remainder of year) Long-Term Debt, Maturity, Remainder of Fiscal Year Net earnings from continuing operations attributable to Liberty Global shareholders (in millions) Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax Operating-related vendor financing additions Proceeds From Operating Related Vendor Financing Additions Proceeds From Operating Related Vendor Financing Additions Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Related Party [Domain] Related and Nonrelated Parties [Domain] Total lease liabilities Lease, Liability Lease, Liability All3Media Ltd. (All3Media) All3Media Group [Member] All3Media [Member] Other Sunrise Holding [Member] Sunrise Holding Vodafone Group Inc. Vodafone Group Inc. [Member] Vodafone Group Inc. Stock repurchased (in shares) Stock Repurchased During Period, Shares Effective income tax rate reconciliation, foreign income tax rate differential, percent Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent B2B Services B2B Services [Member] B2B Services [Member] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Measure: Measure [Axis] Investments [Abstract] Investments [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Telenet Telenet Telenet [Member] Telenet [Member] Aggregate Variable and Fixed Rate Indebtedness Aggregate Variable and Fixed Rate Indebtedness [Member] Aggregate Variable And Fixed Rate Indebtedness [Member] ROU assets: Right-Of-Use Asset Obtained In Exchange For Lease Liability [Abstract] Right-Of-Use Asset Obtained In Exchange For Lease Liability [Abstract] Total liabilities Liabilities, Fair Value Disclosure 2030 Long-Term Debt, Maturity, Year Five Short Short [Member] Co-venturer ownership percentage Equity Method Investment, Co-Venturer Ownership Percentage Equity Method Investment, Co-Venturer Ownership Percentage Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Reclassification adjustments included in net earnings (loss) Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Finance leases Finance Lease, Right-of-Use Asset, after Accumulated Amortization Equity Component [Domain] Equity Component [Domain] Cash and cash equivalents and restricted cash: Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract] Net cash provided by operating activities of discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Foreign currency translation adjustments and other, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Entity Shell Company Entity Shell Company SMAs SMAs [Member] SMAs Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code VMO2 JV VMO2 JV VMO2 JV [Member] VMO2 JV Statement [Table] Statement [Table] Programming costs Programming and Copyright Costs Programming and Copyright Costs Counterparty Name [Axis] Counterparty Name [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Loss before income taxes Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Total Interest Paid, Excluding Capitalized Interest, Operating Activities Fixed Charges Fixed Charges [Member] Fixed Charges Total property and equipment, gross Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Notional amount due from counterparty Due From Counterparty [Member] Due From Counterparty [Member] Capital expenditures, net Payments to Acquire Productive Assets Quoted prices in active markets for identical assets (Level 1) Fair Value, Inputs, Level 1 [Member] Total current assets Assets, Current Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Tax Period [Domain] Tax Period [Domain] Options exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number 2028 Long-Term Debt, Maturity, Year Three Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Changes in operating assets and liabilities, net of the effects of acquisitions and dispositions Increase (Decrease) in Operating Capital Total Total Unrecorded Unconditional Purchase Obligation Other Other Intangible Assets [Member] Income Taxes Income Tax Disclosure [Text Block] Repurchases and cancellations of Liberty Global common shares (note 12) Stock Repurchased and Retired During Period, Value 2029 Lessee, Operating Lease, Liability, to be Paid, Year Four Other comprehensive 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fair value Long-Term Debt, Fair Value Entity Registrant Name Entity Registrant Name Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Percent of remaining results of operations included in investment Percent of Remaining Results of Operations Included in Income (Loss) from Equity Method Investments Percent of Remaining Results of Operations Included in Income (Loss) from Equity Method Investments 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 Equity Method Investment, Nonconsolidated Investee or Group of Investees Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] Fair Value as of Grant Date Award Grant Date Fair Value Effective income tax rate reconciliation, foreign income tax rate differential, amount Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Affiliate Affiliated Entity [Member] Related party note receivable Receivable with Imputed Interest, Face Amount Significant other observable inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Equity (note 12): Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Geographical [Domain] Geographical [Domain] Schedule of Stock-Based Compensation Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Net cash paid for taxes: Income Taxes Paid, Net [Abstract] Restatement Determination Date: Restatement Determination Date [Axis] EdgeConneX, Inc. (EdgeConneX) EdgeConneX EdgeConneX Inc. [Member] EdgeConneX Inc. Title of 12(b) Security Title of 12(b) Security Common stock Common Stock, Value, Issued VM Ireland Credit Facility VM Ireland Credit Facility [Member] VM Ireland Credit Facility Operating cash outflows from finance leases (interest component) Finance Lease, Interest Payment on Liability Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Adjusted EBITDA Adjusted Earnings Before Interest, Taxes, Depreciation, And Amortization Adjusted Earnings Before Interest, Taxes, Depreciation, And Amortization JV Reportable Segments JV Reportable Segments [Member] JV Reportable Segments Vendor financing Vendor Financing [Member] Vendor Financing [Member] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] AE Group Sàrl (AtlasEdge JV) AE Group Sàrl (AtlasEdge JV) [Member] AE Group Sàrl (AtlasEdge JV) Basic earnings (loss) attributable to Liberty Global shareholders per share (in USD per share) Earnings Per Share, Basic Operating cash outflows from operating leases Operating Lease, Payments Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Programming commitments Programming Commitments [Member] Programming Commitments [Member] Ownership [Domain] Ownership [Domain] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Schedule of Goodwill [Table] Goodwill [Table] Continuing operations Interest Paid, Continuing Operations Interest Paid, Continuing Operations Total current liabilities Liabilities, Current Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Pension-related adjustments and other Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Other comprehensive earnings (loss) from continuing operations Other Comprehensive Income (Loss), Net of Tax, Continuing Operations Other Comprehensive Income (Loss), Net of Tax, Continuing Operations LUXEMBOURG LUXEMBOURG Share-based Compensation Share-Based Payment Arrangement [Text Block] Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Entity Address, City or Town Entity Address, City or Town Borrowings of debt Proceeds from Issuance of Long-Term Debt Leases Lessee, Leases [Policy Text Block] Basis Swaps Basis Swap [Member] Schedule of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Share-based compensation expense Share-based compensation expense Share-Based Payment Arrangement, Expense Income tax penalties and interest expense Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Loss Contingencies [Table] Loss Contingencies [Table] Business Acquisition [Axis] Business Acquisition [Axis] Schedule of Intangible Assets Subject to Amortization, Net Schedule of Finite-Lived Intangible Assets [Table Text Block] Foreign currency and other Debt Instrument, Increase (Decrease), Foreign currency, acquisitions and other, Net Debt Instrument, Increase (Decrease), Foreign currency, acquisitions and other, Net 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] Finance leases Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Revenue Recognition and Related Costs Revenue from Contract with Customer [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Aggregate purchase price Treasury Stock, Value, Acquired, Cost Method Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Total assets Assets, Fair Value Disclosure Diluted earnings from continuing operations attributable to Liberty Global shareholders per share (in dollars per share) Business Acquisition, Pro Forma Income (Loss) From Continuing Operations, Net Of Tax, Diluted Business Acquisition, Pro Forma Income (Loss) From Continuing Operations, Net Of Tax, Diluted Other accrued and current liabilities (notes 6 and 10) Other Accrued Liabilities, Current 2025 (remainder of year) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Deferred financing costs, discounts and premiums, net Debt Instrument, Unamortized Discount (Premium), Net Document Period End Date Document Period End Date Current portion Finance Lease, Liability, Current Aviatrix Systems, Inc. (Aviatrix) Aviatrix Aviatrix Systems, Inc. [Member] Aviatrix Systems, Inc. Total payments Lessee, Operating Lease, Liability, to be Paid Cross-currency and interest rate derivative contracts Cross-currency and interest rate derivative contracts Cross Currency Interest Rate Contract [Member] Other than options outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Insider Trading Arrangements [Line Items] Segments Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Three Other Other Contract [Member] Revenue recognized Contract with Customer, Liability, Revenue Recognized Foreign currency forward and option contracts Foreign Exchange Contract [Member] Document Transition Report Document Transition Report Subscription revenue Mobile Subscription [Member] Mobile Subscription [Member] VM Ireland Ireland [Member] Ireland Percentage of net present value, cost savings Percentage of Net Present Value, Cost Savings Percentage of Net Present Value, Cost Savings Entity Current Reporting Status Entity Current Reporting Status Accumulated earnings Retained Earnings [Member] 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 Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] RSUs Restricted Stock Units (RSUs) [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Payment to acquire investment Payments to Acquire Debt Securities, Available-for-Sale Company Selected Measure Name Company Selected Measure Name