2024 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Two Cross-Currency Swap 1 Cross-Currency Swap 1 [Member] Cross-Currency Swap 1 [Member] Total debt before deferred financing costs, discounts and premiums Total vendor financing maturities Balance at January 1 Balance at September 30 Long-Term Debt, Gross Assets: Disposal Group, Including Discontinued Operation, Assets [Abstract] Finance leases Finance Lease, Right-of-Use Asset, after Accumulated Amortization Property, Plant and Equipment [Abstract] Gain (adjustment to gain) on U.K. JV Transaction (note 4) Gain on investments Gain (Loss) on Investments 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 Debt Instrument [Axis] Debt Instrument [Axis] Finance lease obligations Finance lease Present value of lease payments Finance Lease, Liability Fluvius Fluvius [Member] Fluvius Lease 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Aggregate assets associated with incremental costs to obtain a contract and contract fulfillment costs Capitalized Contract Cost, Net Transfers out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Other comprehensive earnings (loss), net of taxes: Other Comprehensive Income (Loss), Net of Tax [Abstract] Award Type [Axis] Award Type [Axis] Recognition of previously unrecognized tax benefits Income Tax Reconciliation, Previously Unrecognized Tax Benefits Income Tax Reconciliation, Previously Unrecognized Tax Benefits Current portion Operating Lease, Liability, Current Net gain on settlement of discount Gain (Loss) On Settlement Of Discounts Gain (Loss) On Settlement Of Discounts Due in five to ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share 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financing costs, discounts and premiums, net Debt Instrument, Unamortized Discount (Premium), Net Percentage of amounts recovered Percentage of Amounts Recovered Percentage of Amounts Recovered Repurchases by Telenet of its outstanding shares Payments for Repurchase of Other Equity Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Goodwill (note 8) Goodwill Goodwill beginning balance Goodwill ending balance Goodwill UPC Revolving Facility UPC Revolving Facility [Member] UPC Revolving Facility [Member] Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Income tax expense (note 11) Total income tax expense Income tax expense Income Tax Expense (Benefit) Geographical [Domain] Geographical [Domain] Net increase (decrease) in cash and cash equivalents and restricted cash: Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect [Abstract] Investments Investment Holdings [Text Block] Programming and other direct costs of services Cost of Goods and Services Sold Total Derivative liability Derivative Liability 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] Continuing operations Income Taxes Paid, Continuing Operations Income Taxes Paid, Continuing Operations Loss Contingencies [Line Items] Loss Contingencies [Line Items] 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 Other accrued and current liabilities Accounts Payable and Accrued Liabilities, Current Total investments Investments Common stock Common Stock, Value, Issued Discontinued operations (in USD per share) Income (Loss) from 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CANAL+ Polska S.A. [Member] CANAL+ Polska S.A. 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JV [Member] VodafoneZiggo JV [Member] Consolidated Entities [Domain] Consolidated Entities [Domain] Accrued Income Taxes [Abstract] Accrued Income Taxes [Abstract] Income Tax Expense Reconciliation Table Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Total Net increase (decrease) Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Intangible assets subject to amortization, net (note 8) Intangible assets subject to amortization, net Other Intangible Assets, Net Entity Central Index Key Entity Central Index Key Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Measurement Input Type [Axis] Measurement Input Type [Axis] Entity [Domain] Entity [Domain] City Area Code City Area Code ASSETS Assets [Abstract] Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation [Table] UPC Facility AY UPC Facility AY [Member] UPC Facility AY Repayments of long-term loans from vendors Repayments of Long-Term Loans from Vendors 2023 Long-Term Debt, Maturity, Year One Share-based compensation expense Share-Based Payment Arrangement, Noncash Expense Other long-term liabilities (notes 3 and 6) Other long-term liabilities Other Liabilities, Noncurrent Share of results of affiliates, net (note 5) Share of results of affiliates, net Share of results of affiliates, net Equity method investment Income (Loss) from Equity Method Investments U.K. U.K. [Member] U.K. / Ireland [Member] Weighted Average Weighted Average [Member] Interkabel Acquisition Interkabel Acquisition [Member] Interkabel Acquisition [Member] Thereafter Finance Lease, Liability, to be Paid, after Year Five Schedule of Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Addition to ROU assets associated with operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability VMO2 JV VMED O2 JV [Member] VMED O2 JV Cash paid for investments Payments to Acquire Interest in Subsidiaries and Affiliates Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Term of leases Total payments Lessee, Operating Lease, Liability, to be Paid Net earnings Net earnings Net earnings Net earnings (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Entity Address, Postal Zip Code Entity Address, Postal Zip Code Realized net losses Debt Securities, Realized Gain (Loss) 2024 Long-Term Debt, Maturity, Year Two VM Ireland VM Ireland [Member] VM Ireland Total investments Investments, Fair Value Disclosure Revenue from transitional services Revenue From Transitional Services Revenue From Transitional Services Schedule of Other Share Based Compensation Activity Share-Based Payment Arrangement, Outstanding Award, Activity, Excluding Option [Table Text Block] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Current portion of debt and finance lease obligations Long-Term Debt and Lease Obligation, Current Total debt maturities Long-term Debt, Gross Contractual Maturities Long-term Debt, Gross Contractual Maturities Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Non-subscription revenue Cable Non-Subscription [Member] Cable Non-Subscription [Member] Purchase commitments Purchase Commitments [Member] Purchase Commitments [Member] Skillz Inc. (Skillz) Skillz [Member] Skillz Lacework Inc. (Lacework) Lacework Lacework Inc. [Member] Lacework Inc. Total debt Long-term Debt Contractual Maturities Long-term Debt Contractual Maturities Adjusted EBITDA Income (loss) from continuing operations before income taxes Sum of operating profit and nonoperating income (expense) before income taxes. Other investing activities, net Payments for (Proceeds from) Other Investing Activities Statistical Measurement [Domain] Statistical Measurement [Domain] Discontinued operations Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] JV Services JV Services [Member] JV Services [Member] Total Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Property and equipment, net (notes 8 and 10) Property and equipment, net Total property and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Aggregate purchase price Treasury Stock, Value, Acquired, Cost Method Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Net earnings attributable to Liberty Global shareholders Net Income (Loss) Attributable to Parent Leases Lessee, Finance Leases [Text Block] Other Other Intangible Assets [Member] 2022 (remainder of year) Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Maturities of Debt and Capital Lease Obligations Schedule of Maturities of Long-Term Debt [Table Text Block] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Long-term debt and finance lease obligations Disposal Group, Including Discontinued Operation, Debt and Capital Lease Obligations, Noncurrent Disposal Group, Including Discontinued Operation, Debt and Capital Lease Obligations, Noncurrent Tax Period [Domain] Tax Period [Domain] Scenario [Axis] Scenario [Axis] Change in valuation allowances Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Total assets Assets, Fair Value Disclosure Other revenue Other Category [Member] Other Category [Member] Other operating expense Other Operating Income (Expense) [Member] Vesting percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Leases Lessee, Operating Leases [Text Block] Treasury shares, at cost Treasury Stock, Common, Value Share-based compensation expense Share-Based Payment Arrangement, Plan Modification, Incremental Cost Plan Name [Axis] Plan Name [Axis] Contract assets Contract with Customer, Asset, after Allowance for Credit Loss Televisa Univision, Inc. (Televisa Univision) Televisa Univision Televisa Univision Holdings Inc [Member] Televisa Univision Holdings Inc Total debt and finance lease obligations Long-Term Debt and Lease Obligation, Including Current Maturities Liabilities: Disposal Group, Including Discontinued Operation, Liabilities [Abstract] Continuing operations (in USD per share) Income (Loss) from Continuing Operations, Per Diluted Share Derivative Instrument [Axis] Derivative Instrument [Axis] 2022 (remainder of year) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Quoted prices in active markets for identical assets (Level 1) Fair Value, Inputs, Level 1 [Member] Schedule of Weighted Average Number of Shares Schedule of Weighted Average Number of Shares [Table Text Block] Mobile Services Mobile Services [Member] Mobile Services [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 Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Total Derivative assets Derivative Asset Schedule of Debt Securities Debt Securities, Available-for-Sale [Table Text Block] Non-taxable gain (adjustment to gain) associated with the U.K. JV Transaction Effective Income Tax Rate Reconciliation, Disposition of Business, Amount Related Party Transaction [Domain] Related Party Transaction [Domain] UPC Facility AQ UPC Facility AQ [Member] UPC Facility AQ Telenet Overdraft Facility Telenet Overdraft Facility [Member] Telenet Overdraft Facility [Member] Liberty Global Liberty Global [Member] Liberty Global Due in one to five years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value 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] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] UPC Poland UPC Poland [Member] UPC Poland Legal Entity [Axis] Legal Entity [Axis] UPC Holding Senior Notes UPC Holding Senior Notes Debt [Member] UPC Holding Senior Notes Debt [Member] Certificates of deposit Certificates of Deposit [Member] Operating-related vendor financing additions Long Term Debt, Operating Related Additions Long Term Debt, Operating Related Additions Geographical [Axis] Geographical [Axis] Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Broadband internet Cable Broadband Internet Subscription [Member] Cable Broadband Internet Subscription [Member] Current Derivative Liability, Current Income Tax Contingency Income Tax Contingency [Member] Income Tax Contingency Schedule of Property and Equipment Property, Plant and Equipment [Table Text Block] Short-term, separately-managed accounts (SMAs) Debt Securities, Available-for-Sale, Current Cross-Currency Swap 8 Cross-Currency Swap 8 [Member] Cross-Currency Swap 8 Country Region Country Region Debt Covenant [Domain] Debt Covenant [Domain] Debt Covenant [Domain] Dividend distributions received from the VMO2 JV Proceeds from Equity Method Investment, Distribution, Return of Capital Segments [Axis] Segments [Axis] Debt Debt Disclosure [Text Block] Product and Service [Domain] Product and Service [Domain] Entity Shell Company Entity Shell Company Class B Common Class B [Member] Realized and unrealized gains on derivative instruments, net Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings All3Media Group (All3Media) All3Media All3Media [Member] All3Media [Member] 2023 Lessee, Operating Lease, Liability, to be Paid, Year One Financial Instrument [Axis] Financial Instrument [Axis] 2025 Long-Term Debt, Maturity, Year Three Consolidation Items [Domain] Consolidation Items [Domain] Subsequent Event Subsequent Event [Member] Document Period End Date Document Period End Date Class C Common Class C [Member] Gain on AtlasEdge JV Transactions Gain on AtlasEdge JV Transactions Business Combination, Separately Recognized Transactions, Revenues and Gains Recognized Total assets Assets Net cash used by financing activities of continuing operations Net Cash Provided by (Used in) Financing Activities, Continuing Operations Earnings Per Share [Abstract] Earnings Per Share [Abstract] Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities [Axis] Belgium Belgium Segment [Member] Belgium Segment [Member] Other investments Equity Securities, FV-NI, Current Other commitments Other Commitments [Member] Other Commitments [Member] Interest Rate Swap Interest Rate Swap [Member] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Five Estimated fair value Long-Term Debt, Fair Value Investments and related notes receivable (including $2,162.5 million and $2,757.8 million, respectively, measured at fair value on a recurring basis) (note 5) Long-term investments Long-Term Investments Authorized amount of share repurchases Stock Repurchase Program, Authorized Amount Earnings from continuing operations before income taxes Earnings (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Telenet Revolving Facility Telenet Revolving Facility [Member] Telenet Revolving Facility [Member] Segments [Domain] Segments [Domain] Weighted average remaining life Derivative, Average Remaining Maturity Schedule of Goodwill [Table] Schedule of Goodwill [Table] Amortization of deferred financing costs and non-cash interest Amortization of Debt Issuance Costs and Discounts Earnings per Share Earnings Per Share [Text Block] Interest Rate Caps Interest Rate Cap [Member] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Comprehensive earnings (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Award Type [Domain] Award Type [Domain] Gains (losses) on debt extinguishment, net (note 9) Losses (gains) on debt extinguishment, net Losses (gains) on debt extinguishment, net Gain (Loss) on Extinguishment of Debt Income Tax Contingency [Table] Income Tax Contingency [Table] Net cash used by investing activities of discontinued operations Cash Provided by (Used in) Investing Activities, Discontinued Operations Total B2B revenue Business to Business [Member] Business to Business [Member] Revenue Revenue from Contract with Customer, Including Assessed Tax Discontinued operations (in USD per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Total finance lease expense Finance Lease, Cost Finance Lease, Cost Basis Swaps Basis Swap [Member] Foreign currency translation adjustments and other Goodwill, Foreign Currency Translation Gain (Loss) Customer relationships Customer Relationships [Member] Entity Address, City or Town Entity Address, City or Town ITV Collar ITV Collar [Member] ITV Collar [Member] Long-lived Assets Long Lived Assets Disclosure [Text Block] The entire disclosure for long-lived assets. Unrecognized tax benefits decrease Unrecognized Tax Benefits, Period Increase (Decrease) Cross-currency, interest rate and foreign currency derivative contracts Cross-Currency and Interest Rate Derivative Contracts [Member] Cross-Currency and Interest Rate Derivative Contracts [Member] Intersegment eliminations Intersegment Eliminations [Member] Subscription revenue Business to Business Subscription [Member] Business to Business Subscription [Member] Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Condensed Consolidated Balance Sheet Statement of Financial Position [Abstract] Held by former Liberty Global employees Former Employees [Member] Former Employees [Member] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Investments by Accounting Method Schedule of Investments by Accounting Method [Table Text Block] Schedule of Investments by Accounting Method [Table Text Block] Treasury shares, at cost Treasury Stock, Common [Member] Debt and Lease Obligation [Abstract] Debt and Lease Obligation [Abstract] Non-deductible or non-taxable foreign currency exchange results Effective Income Tax Rate Reconciliation, Foreign Currency Translation, Amount Effective Income Tax Rate Reconciliation, Foreign Currency Translation, Amount Disposal Group Classification [Axis] Disposal Group Classification [Axis] NetCo NetCo [Member] NetCo Restricted cash included in other current assets and other assets, net Restricted Cash and Cash Equivalents RSUs Restricted Stock Units (RSUs) [Member] Entity Information [Line Items] Entity Information [Line Items] Switzerland SWITZERLAND 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 Liberty Global Parent Company [Member] Net earnings from continuing operations attributable to Liberty Global shareholders Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Schedule of Changes in Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] Total Interest Paid, Excluding Capitalized Interest, Operating Activities Belgium BELGIUM Property and equipment, net Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent 2025 Lessee, Operating Lease, Liability, to be Paid, Year Three Stock Options, SARs and RSUs Stock Options, SARs and RSUs [Member] Stock Options, SARs and RSUs [Member] Lessee, Leasing Arrangement [Domain] Lessee, Leasing Arrangement [Domain] Lessee, Leasing Arrangement [Domain] Restricted cash included in current 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 Counterparty Name [Domain] Counterparty Name [Domain] Total Liberty Global shareholders Stockholders' Equity Attributable to Parent Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [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 ROU assets associated with finance leases Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Investments Investments [Member] Ireland IRELAND Amortization related to contract costs Capitalized Contract Cost, Amortization Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Debt Covenant, Scenario 1 Debt Covenant, Scenario 1 [Member] Debt Covenant, Scenario 1 2027 Long-Term Debt, Maturity, Year Five Proceeds from sale of debt securities Proceeds from Sale of Debt Securities, Available-for-Sale Accumulated earnings Retained Earnings [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Total lease expense Lease, Cost Ordinary shares Common Stock [Member] Lease Balances Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Lease Expense and Cash Outflows from Operating and Finance Leases Lease, Cost [Table Text Block] Changes in operating assets and liabilities, net of the effects of acquisitions and dispositions Increase (Decrease) in Operating Capital Pax8 Inc. (Pax8) Pax8 Pax8 [Member] Pax8 Statement [Table] Statement [Table] Classes of Assets and Liabilities Held for Sale Disposal Groups, Including Discontinued Operations [Table Text Block] Gain on sale of investment Equity Method Investment, Realized Gain (Loss) on Disposal Vendor Financing Obligation [Roll Forward] Vendor Financing Obligation [Roll Forward] Vendor Financing Obligation Long-term operating lease liabilities (notes $4 and 10) Long-term portion Operating Lease, Liability, Noncurrent Statistical Measurement [Axis] Statistical Measurement [Axis] Related Party Transaction [Axis] Related Party Transaction [Axis] Disposal Group Name [Axis] Disposal Group Name [Axis] Trade receivables, net Accounts Receivable, after Allowance for Credit Loss, Current Equity Components [Axis] Equity Components [Axis] Other Other Share-Based Incentive Awards [Member] Other Share-Based Incentive Awards [Member] Litigation Case [Domain] Litigation Case [Domain] U.K. UNITED KINGDOM Acquisitions and Dispositions [Abstract] Acquisitions and Dispositions [Abstract] Acquisitions and Dispositions [Abstract] Statement [Line Items] Statement [Line Items] Other than options outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Total residential revenue Residential [Member] Residential [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Non-operating income (expense) Nonoperating Income (Expense) Gross carrying amount Finite-Lived Intangible Assets, Gross Selling, general and administrative (SG&A) (note 13) Selling, General and Administrative Expense Performance-based incentive awards Performance-Based Incentive Awards [Member] Performance-Based Incentive Awards [Member] Operating leases Operating Lease, Right-of-Use Asset Repurchases by Telenet of its outstanding shares Stock Repurchased During Period, Value Accumulated other comprehensive earnings (loss), net of taxes AOCI Attributable to Parent [Member] Cash paid for interest: Interest Paid, Including Capitalized Interest, Operating and Investing Activities [Abstract] Finance lease, liability, current, statement of financial position [Extensible List] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Document Transition Report Document Transition Report Local Phone Number Local Phone Number Schedule of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Operating income Operating Income (Loss) Cash and restricted cash contributed to the VMO2 JV in connection with the U.K. JV Transaction Payments For Deconsolidation Of Interest In Joint Venture Payments For Deconsolidation Of Interest In Joint Venture Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Other operating (note 13) Other Cost and Expense, Operating Disposed of by sale Discontinued Operations, Disposed of by Sale [Member] Ownership percentage sold Disposal Group, Including Discontinued Operations, Ownership Percentage Sold Disposal Group, Including Discontinued Operations, Ownership Percentage Sold Income tax expense Discontinued Operation, Tax Effect of Discontinued Operation Switzerland Switzerland Segment [Member] Switzerland Segment [Member] Total liabilities Liabilities, Fair Value Disclosure Stock repurchased (in shares) Stock Repurchased During Period, Shares Equity Method Investee Equity Method Investee [Member] 2021 Ventures Incentive Plan 2021 Ventures Incentive Plan [Member] 2021 Ventures Incentive Plan Initial investment percent Alternative Investment, Measurement Input Adjustments to reconcile earnings 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] Schedule Of Realized And Unrealized Gains On Derivative Instruments Schedule Of Realized And Unrealized Gains On Derivative Instruments [Table Text Block] Schedule Of Realized And Unrealized Gains On Derivative Instruments Finance lease, right-of-use asset, statement of financial position [Extensible List] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Available to loan or distribute Financing Receivable, Available To Distribute Financing Receivable, Available To Distribute 2026 Lessee, Operating Lease, Liability, to be Paid, Year Four Condensed Consolidated Statement of Operations Income Statement [Abstract] Net cash paid for taxes: Income Taxes Paid, Net [Abstract] Additional paid-in capital Additional Paid-in Capital [Member] Document Fiscal Period Focus Document Fiscal Period Focus Percentage of legal and other third party, fees Percentage of Legal and Other Third Party, Fees Percentage of Legal and Other Third Party, Fees Unrecorded Purchase Obligation Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Basic earnings attributable to Liberty Global shareholders per share (note 14): Earnings Per Share, Basic [Abstract] Weighted average common shares (diluted EPS computation) (in shares) Weighted Average Number of Shares Outstanding, Diluted Derivative [Line Items] Derivative [Line Items] AtlasEdge JV AtlasEdge JV AtlasEdge JV [Member] AtlasEdge JV Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Other Other Subsidiaries [Member] Relating to Other Subsidiaries not otherwise identified. Summary of Assets and Liabilities Measured at Fair Value Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Operating Segments Operating Segments [Member] Short-term lease expense Short-Term Lease, Cost 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 Net earnings attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Foreign currency forward and option contracts Foreign currency forward and option contracts Foreign Exchange Forward [Member] Borrowings of debt Proceeds from Issuance of Long-Term Debt Equity Method Investments Equity Method Investments [Table Text Block] Common stock, issued (in shares) Common Stock, Shares, Issued Current liabilities of discontinued operations (note $4) Disposal Group, Including Discontinued Operation, Liabilities, Current Equity Equity Method Investments 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 Debt Covenant [Axis] Debt Covenant [Axis] Debt Covenant Held by Liberty Global employees: Employees [Member] Employees [Member] Foreign currency transaction gains, net Foreign currency transaction gains, net Foreign currency transaction gains, net Foreign Currency Transaction Gain (Loss), before Tax Current portion Finance Lease, Liability, Current 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] Net cash provided (used) by investing activities Net Cash Provided by (Used in) Investing Activities Operating-related vendor financing additions Proceeds From Operating Related Vendor Financing Additions Proceeds From Operating Related Vendor Financing Additions Gain on disposal of discontinued operations, net of taxes Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Debt instrument, face amount Debt Instrument, Face Amount Comprehensive earnings (loss) attributable to Liberty Global shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Litigation Case [Axis] Litigation Case [Axis] U.K. J.V. Entities U.K. J.V. Entities [Member] U.K. J.V. Entities Net cash provided (used) by investing activities of continuing operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations Revenue and Operating Cash Flow by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Entity Current Reporting Status Entity Current Reporting Status Total lease liabilities Lease, Liability Lease, Liability UPC Revolving Facility One UPC Revolving Facility One [Member] UPC Revolving Facility One Net earnings attributable to Liberty Global shareholders Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent 2023 Finance Lease, Liability, to be Paid, Year One Cross-currency and interest rate derivative contracts Cross Currency Interest Rate Contract [Member] 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, Current Proceeds from joint venture Proceeds From Equity Method Investment Proceeds From Equity Method Investment Vodafone Group Inc. Vodafone Group Inc. [Member] Vodafone Group Inc. Derivative [Table] Derivative [Table] Options outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Pension-related adjustments and other Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax B2B Services B2B Services [Member] B2B Services [Member] Adjustments due to changes in subsidiaries’ equity and other, net Stockholders' Equity, Other 2024 Finance Lease, Liability, to be Paid, Year Two Continuing operations Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations Entities [Table] Entities [Table] 2023 Unrecorded Unconditional Purchase Obligation, to be Paid, Year One Title of Individual [Domain] Title of Individual [Domain] Finance lease, liability, noncurrent, statement of financial position [Extensible List] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] 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] Total carrying amount of debt Long-Term Debt Other income, net Other income, net Other Nonoperating Income (Expense) ROU assets: Right-Of-Use Asset Obtained In Exchange For Lease Liability [Abstract] Right-Of-Use Asset Obtained In Exchange For Lease Liability [Abstract] Revenue by Major Category Revenue from External Customers by Products and Services [Table Text Block] Accumulated other comprehensive earnings (loss), net of taxes Accumulated Other Comprehensive Income (Loss), Net of Tax Co-venturer ownership percentage Equity Method Investment, Co-Venturer Ownership Percentage Equity Method Investment, Co-Venturer Ownership Percentage Class A Common Class A [Member] Total current assets Current assets Assets, Current Total Income Taxes Paid, Net Revenue recognized Contract with Customer, Liability, Revenue Recognized Entity Small Business Entity Small Business Minimum repurchase percentage Share Repurchase Program, Minimum Repurchase Requirement, Percentage Share Repurchase Program, Minimum Repurchase Requirement, Percentage Net carrying amount Finite-Lived Intangible Assets, Net Thereafter Unrecorded Unconditional Purchase Obligation, to be Paid, after Year Five Weighted average life Debt Securities, Available-for-Sale, Term SMAs SMAs [Member] SMAs Dividend distributions by subsidiaries to noncontrolling interest owners Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Revenue, remaining performance obligation, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Programming costs Programming and Copyright Costs Programming and Copyright Costs Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Cash received from the sale of investments Proceeds from Sale, Maturity and Collection of Investments Consolidated Entities [Axis] Consolidated Entities [Axis] Notional amount due from counterparty Pays fixed rate Due From Counterparty [Member] Due From Counterparty [Member] Dividend distributions received from joint venture Proceeds from Equity Method Investment, Distribution Operating costs and expenses Costs and Expenses Net cash used by financing activities of discontinued operations Cash Provided by (Used in) Financing Activities, Discontinued Operations Debt Instrument [Line Items] Debt Instrument [Line Items] Class of Stock [Line Items] Class of Stock [Line Items] Operating leases Present value of lease payments Operating Lease, Liability Total payments Finance Lease, Liability, to be Paid Related party note receivable Receivable with Imputed Interest, Face Amount Maturities of Financing Lease Liabilities Finance Lease, Liability, Fiscal Year Maturity [Table Text Block] Gain (loss) on derivative instruments, net Realized and unrealized gains on derivative instruments, net Derivative, Gain (Loss) on Derivative, Net Amortized cost basis Debt Securities, Available-for-Sale, Amortized Cost Other comprehensive loss from discontinued operations (note 4) Other Comprehensive Income (Loss), Net of Tax, Discontinued Operations Other Comprehensive Income (Loss), Net of Tax, Discontinued Operations Estimated fair value of final payout Share-Based Compensation Plan, Final Payment, Estimated Fair Value Share-Based Compensation Plan, Final Payment, Estimated Fair Value 2026 Long-Term Debt, Maturity, Year Four Write off deferred financing costs Write off of Deferred Debt Issuance Cost Entity Filer Category Entity Filer Category Equity (note 12): Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Tax Year 2018 Tax Year 2018 [Member] Other Other Debt [Member] Other Debt [Member] Share-based compensation expense Share-Based Payment Arrangement, Expense Commitments and contingencies (notes 6, 9, 10, 11 and 15) Commitments and Contingencies Security Exchange Name Security Exchange Name 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 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 Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Contractual maturity: Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling Maturity, Fair Value [Abstract] Total fair value of the net assets of the VMO2 JV Net Assets Current assets of discontinued operations (note 4) Current assets Disposal Group, Including Discontinued Operation, Assets, Current Revenue (notes 3, 4, 5 and 16) Revenue from Contract with Customer, Excluding Assessed Tax Operating income Disposal Group, Including Discontinued Operation, Operating Income (Loss) SARs Stock Appreciation Rights (SARs) [Member] Cover [Abstract] Cover [Abstract] EdgeConneX Inc. (EdgeConneX) EdgeConneX EdgeConneX Inc. [Member] EdgeConneX Inc. Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction VM Ireland Credit Facility VM Ireland Credit Facility [Member] VM Ireland Credit Facility 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] Other Other Equity Related Derivative Instrument [Member] Other Equity Related Derivative Instrument [Member] Adjusted EBITDA Adjusted Earnings Before Interest, Taxes, Depreciation, And Amortization Adjusted Earnings Before Interest, Taxes, Depreciation, And Amortization Weighted average discount rate, for finance leases Finance Lease, Weighted Average Discount Rate, Percent Revenue Recognition and Related Costs Revenue from Contract with Customer [Text Block] Forecast Forecast [Member] Current Derivative Asset, Current Continuing operations Cash, Cash Equivalents, Restricted Cash, And Restricted Cash Equivalents, Period Increase (Decrease) Including Exchange Rate Effect, Continuing Operations Cash, Cash Equivalents, Restricted Cash, And Restricted Cash Equivalents, Period Increase (Decrease) Including Exchange Rate Effect, Continuing Operations Total liabilities and equity Liabilities and Equity Vendor financing Vendor Financing [Member] Vendor Financing [Member] Slovakia SLOVAKIA Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Remaining authorized for share repurchases Stock Repurchase Program, Remaining Authorized Repurchase Amount Less: present value discount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Diluted earnings attributable to Liberty Global shareholders per share (in USD per share) Earnings Per Share, Diluted Programming commitments Programming Commitments [Member] Programming Commitments [Member] Percentage of ownership interest Noncontrolling Interest, Ownership Percentage by Parent Consolidation Items [Axis] Consolidation Items [Axis] Continuing operations Interest Paid, Continuing Operations Interest Paid, Continuing Operations 2024 Lessee, Operating Lease, Liability, to be Paid, Year Two Other current assets (notes 3, 5 and 6) Other Assets, Current Unrecognized tax benefits Unrecognized Tax Benefits Long-term investments at fair value Equity Securities, FV-NI and without Readily Determinable Fair Value Property and equipment additions: Equity Method Investment, Summarized Financial Information, Payment to Acquire Property, Plant and Equipment Equity Method Investment, Summarized Financial Information, Payment to Acquire Property, Plant and Equipment 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 Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Corporate debt securities Corporate Debt Securities [Member] Due from related party Due from Related Parties Discontinued operations Earnings from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Maturities of Operating Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, Address Line One Entity Address, Address Line One Deferred revenue Contract with Customer, Liability Product and Service [Axis] Product and Service [Axis] Discontinued operations Interest Paid, Discontinued Operations Class of Stock [Domain] Class of Stock [Domain] Interest expense Interest expense Interest Expense 2022 Ventures Incentive Plan 2022 Ventures Incentive Plan [Member] 2022 Ventures Incentive Plan UPC Austria UPC Austria [Member] UPC Austria [Member] Summary Of Vendor Financing Obligations Schedule of Long-Term Debt Instruments [Table Text Block] 2025 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three Foreign currency, acquisitions and other Debt Instrument, Increase (Decrease), Foreign currency, acquisitions and other, Net Debt Instrument, Increase (Decrease), Foreign currency, acquisitions and other, Net Fixed-line telephony Cable Fixed-line Telephony Subscription [Member] Cable Fixed-line Telephony Subscription [Member] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Discontinued operations Cash, Cash Equivalents, Restricted Cash, And Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Disposal Group Including Discontinued Operations Cash, Cash Equivalents, Restricted Cash, And Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Disposal Group Including Discontinued Operations Interest accrued Increase (Decrease) in Accrued Interest Receivable, Net Property and equipment gross Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Operating cash outflows from finance leases (interest component) Finance Lease, Interest Payment on Liability Aviatrix Systems, Inc. (Aviatrix) Aviatrix Systems, Inc. [Member] Aviatrix Systems, Inc. Commercial paper Commercial Paper [Member] VodafoneZiggo JV VodafoneZiggo JV and VMED O2 JV [Member] VodafoneZiggo JV and VMED O2 JV UPC SPE Notes UPCB SPE Notes [Member] UPCB SPE Notes [Member] Other assets, net Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent Tax Period [Axis] Tax Period [Axis] Other accrued and current liabilities (notes $4 and 10) Other Accrued Liabilities, Current Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Other debt securities Other Debt Obligations [Member] Subscription revenue Mobile Subscription [Member] Mobile Subscription [Member] Ireland Ireland [Member] Ireland Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Percentage of net present value, cost savings Percentage of Net Present Value, Cost Savings Percentage of Net Present Value, Cost Savings Balance of net assets (liabilities) at January 1, 2022 Balance of net assets at September 30, 2022 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Computed “expected” tax (expense) Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] 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] Less: present value discount Finance Lease, Liability, Undiscounted Excess Amount Loss in changes in the credit risk valuation adjustments associated with our cross-currency and interest rate derivative contracts Gain Loss On Credit Risk Derivatives Net Recognized In Earnings Gain Loss On Credit Risk Derivatives Net Recognized In Earnings Disposal Group Classification [Domain] Disposal Group Classification [Domain] Cash received in connection with the sale of UPC Poland Proceeds from Divestiture of Businesses, Net of Cash Divested Net earnings from continuing operations attributable to noncontrolling interests Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest Long-term Derivative Liability, Noncurrent