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with finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Percent of reduction in monthly wholesale cable resale access prices Percent Of Reduction In Monthly Wholesale Cable Resale Access Prices Percent of Reduction in Monthly Wholesale Cable Resale Access Prices Net earnings attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest EdgeConneX EdgeConneX [Member] EdgeConneX Termination rights period Equity Method Investment, Termination Rights Period Equity Method Investment, Termination Rights Period Entity Interactive Data Current Entity Interactive Data Current Schedule of Fair Values of Derivative Instrument Assets and Liabilities Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Other Share Based Compensation Activity Share-based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block] Fair Value Measurements Fair Value 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Current assets Disposal Group, Including Discontinued Operation, Other Assets, Current Entity Registrant Name Entity Registrant Name Subsequent Event Type [Domain] Subsequent Event Type [Domain] Derivative [Table] Derivative [Table] Business Acquisition [Line Items] Business Acquisition [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Weighted average discount rate, for operating leases Operating Lease, Weighted Average Discount Rate, Percent Foreign currency translation adjustments and other, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Intersegment eliminations Intersegment Eliminations [Member] Other operating (note 13) Other Cost and Expense, Operating Schedule of Investments [Table] Schedule of Investments [Table] Telenet Credit Facility Telenet Credit Facility [Member] Telenet Credit Facility [Member] Reduction in UTB Decrease in Unrecognized Tax Benefits is Reasonably Possible Less: present value discount Finance Lease, Liability, Undiscounted Excess Amount Impact of derivative instruments on borrowing costs Impact of Derivative Instruments on Borrowing Costs, Percent Increase (Decrease) Impact of Derivative Instruments on Borrowing Costs, Percent Increase (Decrease) International rate differences Effective Income Tax Rate Reconciliation, Decrease in Foreign Income Tax Rate Differential, Amount Effective Income Tax Rate Reconciliation, Decrease in Foreign Income Tax Rate Differential, Amount Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Held by Liberty Global employees: Employees [Member] Employees [Member] Consolidation Items [Axis] Consolidation Items [Axis] Debt and Lease Obligation [Abstract] Debt and Lease Obligation [Abstract] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Investments [Abstract] Investments [Abstract] Trade receivables, net Accounts Receivable, after Allowance for Credit Loss, Current Derivative instruments (note 6) Derivative Instruments and Hedges, Liabilities Total payments Lessee, Operating Lease, Liability, to be Paid Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Accumulated unrealized gains (losses) Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Slovakia SLOVAKIA U.K. J.V. Entities U.K. J.V. Entities [Member] U.K. J.V. Entities Entity Address, Postal Zip Code Entity Address, Postal Zip Code Total lease liabilities Lease, Liability Lease, Liability UPC Revolving Facility One UPC Revolving Facility One [Member] UPC Revolving Facility One Goodwill (note 8) Goodwill beginning balance Goodwill ending balance Goodwill Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Repayments and repurchases of debt and finance lease obligations Repayment of Long-term Debt, Long-term Lease Obligation, and Capital Security Document Transition Report Document Transition Report Title of Individual [Axis] Title of Individual [Axis] Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation [Line Items] Current portion of debt and finance lease obligations Disposal Group, Including Discontinued Operation, Debt and Capital Lease Obligations, Current Disposal Group, Including Discontinued Operation, Debt and Capital Lease Obligations, 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costs and non-cash interest Amortization of Debt Issuance Costs and Discounts UPC Facility AV1 UPC Facility AV1 [Member] UPC Facility AV1 Classes of assets and liabilities held for sale Disposal Groups, Including Discontinued Operations [Table Text Block] Net cash used by financing activities Net Cash Provided by (Used in) Financing Activities Remainder of 2021 Unrecorded Unconditional Purchase Obligation, to be Paid, Remainder of Fiscal Year Co-venturer ownership percentage Equity Method Investment, Co-Venturer Ownership Percentage Equity Method Investment, Co-Venturer Ownership Percentage Goodwill Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Share-based compensation expense Share-based Payment Arrangement, Expense Value added tax, vendor financing arrangement Value Added Tax, Vendor Financing Arrangement Value Added Tax, Vendor Financing Arrangement Cash paid for amounts included in the measurement of lease liabilities: Cash Flow, Lessee [Abstract] Cash Flow, Lessee [Abstract] Unrecognized tax benefits Unrecognized Tax Benefits Revenue Revenue from Contract with Customer, Including Assessed Tax CANAL+ Polska S.A. CANAL+ Polska S.A. [Member] CANAL+ Polska S.A. Counterparty Name [Axis] Counterparty Name [Axis] Common stock Common Stock, Value, Issued Investments and related notes receivable (including $2,057.3 million and $1,865.8 million, respectively, measured at fair value on a recurring basis) (note 5) Long-term investments Long-term Investments Non-cash borrowings and repayments Non-Cash Borrowings and Repayments of Debt Non-Cash Borrowings and Repayments of Debt Schedule of Realized and Unrealized Losses on Derivative Instruments Schedule Of Realized And Unrealized Gains Losses On Derivative Instruments Text Block Schedule Of Realized And Unrealized Gains Losses On Derivative Instruments. Long-term Debt Long-term Debt [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Document Fiscal Year Focus Document Fiscal Year Focus Cross-Currency Swap 5 Cross-Currency Swap 5 [Member] Cross-Currency Swap 5 [Member] Commercial paper Commercial Paper [Member] Current portion Long-term Debt, Current Maturities Entity Current Reporting Status Entity Current Reporting Status 2025 Finance Lease, Liability, to be Paid, Year Four Asset Derivative Asset [Abstract] Current portion of debt and finance lease obligations (notes 9 and 10) Debt, Current Percentage of minority interest revenues and expenses included in net earnings attributable to noncontrolling interest Percentage Of Minority Interest Revenues And Expenses From Consolidated Statements Of Operations Included In Net Earnings Attributable To Noncontrolling Interest Percentage Of Minority Interest Revenues And Expenses From Consolidated Statements Of Operations Included In Net Earnings Attributable To Noncontrolling Interest Network and connectivity commitments Network and Connectivity Commitments [Member] Network and Connectivity Commitments [Member] Total property and equipment additions Property, Plant and Equipment, Additions Performance measures, percentage of reportable 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 Related Party Transaction [Axis] Related Party Transaction [Axis] Recorded liability Recorded Liability Not Acquried Recorded Liability Not Acquried Other assets, net Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent Comprehensive earnings (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Programming costs Programming and Copyright Costs Programming and Copyright Costs Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest 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 Text Block Schedule Of Cash Received Paid Related To Derivative Instruments Statement Of Cash Flows Location. Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Telenet Revolving Credit Facility I Telenet Revolving Credit Facility I [Member] Telenet Revolving Credit Facility I [Member] Share price (in dollars per share) Business Acquisition, Share Price Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Common stock, issued (in shares) Common Stock, Shares, Issued Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value EdgeConneX Inc. (EdgeConneX) EQT [Member] EQT Foreign currency forward and option contracts Foreign currency forward and option contracts Foreign Exchange Forward [Member] Due in one year or less Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Operating leases Present value of lease payments Operating Lease, Liability 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] Notional amount due from counterparty Notional amount Due From Counterparty [Member] Due From Counterparty [Member] Noncurrent portion Long-term Debt, Excluding Current Maturities 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] Debt Instrument [Line Items] Debt Instrument [Line Items] Total residential cable revenue Cable [Member] Cable [Member] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Total Liberty Global shareholders Stockholders' Equity Attributable to Parent Consideration transferred Business Combination, Consideration Transferred Pension-related adjustments and other Other Comprehensive Income Defined Benefit Plans Adjustment And Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease Other Comprehensive Income Defined Benefit Plans Adjustment And Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease Total liabilities and equity Liabilities and Equity 2025 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four Loss Contingencies [Line Items] Loss Contingencies [Line Items] Accumulated other comprehensive earnings, net of taxes Accumulated Other 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Counterparty [Member] Due To Counterparty [Member] Weighted average remaining lease term for finance leases Finance Lease, Weighted Average Remaining Lease Term Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Short-term lease expense Short-term Lease, Cost Video Cable Video Subscription [Member] Cable Video Subscription [Member] Belgium Regulatory Developments Belgium Regulatory Developments [Member] Belgium Regulatory Developments [Member] VodafoneZiggo JV Loan VodafoneZiggo JV Loan [Member] VodafoneZiggo JV Loan [Member] Equity Component [Domain] Equity Component [Domain] Long-term Derivative Asset, Noncurrent Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Third-Party Purchaser Third-Party Purchaser [Member] Third-Party Purchaser [Member] Property and equipment, net (notes 8 and 10) Property, Plant and Equipment, Net Total assets Disposal Group, Including Discontinued Operation, Assets Entity Tax Identification Number Entity Tax Identification Number Revenue Recognition and Related Costs Revenue from Contract with Customer [Policy Text Block] Share-based Compensation Share-based Payment Arrangement [Text Block] Net earnings attributable to Liberty Global shareholders Net Income (Loss) Attributable to Parent Noncurrent portion Finance Lease, Liability, Noncurrent Cross-Currency Swap 4 Cross-Currency Swap 4 [Member] Cross-Currency Swap 4 [Member] Other Other Debt [Member] Other Debt [Member] Total residential mobile revenue Mobile Residential [Member] Mobile Residential [Member] 2021 (remainder of year) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year LIBOR London Interbank Offered Rate (LIBOR) [Member] Investment, Name [Domain] Investment, Name [Domain] Other comprehensive loss Other comprehensive loss, net of taxes Other Comprehensive 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Commitments [Member] Programming Commitments [Member] 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] Gross carrying amount Finite-Lived Intangible Assets, Gross Other operating expense Other Operating Income (Expense) [Member] Due in five to ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Assets acquired under finance leases Lease Obligation Incurred Interest rate Debt Instrument, Interest Rate, Stated Percentage Government bonds Municipal Bonds [Member] Class A Common Class A [Member] Realized and unrealized gains on derivative instruments, net Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs 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from continuing operations attributable to Liberty Global shareholders per share (in USD per share) Earnings Per Share, Diluted Current portion Finance Lease, Liability, Current Proceeds from sale of debt securities Proceeds from Sale of Debt Securities, Available-for-sale Local Phone Number Local Phone Number Cross-Currency Swap 2 Cross-Currency Swap 2 [Member] Cross-Currency Swap 2 [Member] Operating activities Payments for (Proceeds from) Derivative Instrument, Operating Activities Payments for (Proceeds from) Derivative Instrument, Operating Activities Pro Forma Information for Significant Acquisitions Business Acquisition, Pro Forma Information [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] VodafoneZiggo JV Receivable I VodafoneZiggo JV Receivable I [Member] VodafoneZiggo JV Receivable I Schedule of Debt 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