Segment Reporting, Measurement Disclosures [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Cable & Wireless Communications Limited (CWC) [Member] Cable & Wireless Communications Limited (CWC) [Member] Cable & Wireless Communications Limited (CWC) [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Consumer and Business-to-Business Services [Member] Consumer and Business-to-Business Services [Member] Consumer and Business-to-Business Services [Member] Sub-Sea Networks [Member] Sub-Sea Networks [Member] Sub-Sea Networks [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Latin America and the Caribbean [Member] Latin America and the Caribbean [Member] Latin America and the Caribbean [Member] Outside of Latin America and Caribbean [Member] Outside of Latin America and Caribbean [Member] Outside of Latin America and Caribbean [Member] Principal Transaction Revenue, Description of Reporting Category [Axis] Principal Transaction Revenue, Description of Reporting Category [Axis] Name of Reporting Category [Domain] Name of Reporting Category [Domain] Mobile Interconnect [Member] Mobile Interconnect [Member] Mobile Interconnect [Member] SOHO Cable Subscription [Member] SOHO Cable Subscription [Member] SOHO Cable Subscription [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] European Operations Division U.K / Ireland [Member] European Operations Division U.K / Ireland [Member] European Operations Division U.K / Ireland [Member] European Operations Division Switzerland / Austria [Member] European Operations Division Switzerland / Austria [Member] European Operations Division Switzerland / Austria [Member] Total European Operations Division [Member] Total European Operations Division [Member] Total European Operations Division [Member] Telenet and Liberty Puerto Rico [Member] Telenet and Liberty Puerto Rico [Member] Telenet and Liberty Puerto Rico [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenues Revenues Threshold percentage used to determine reportable segments using one of three criteria of revenue, operating cash flow or total assets Threshold Percentage Of Revenue Operating Cash Flows Or Total Assets Used To Identify Reportable Segments Threshold Percentage Of Revenue Operating Cash Flows Or Total Assets Used To Identify Reportable Segments. Number of European countries in operating segment (in countries) Number Of European Countries In Operating Segment Number Of European Countries In Operating Segment 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 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 Number of countries in which entity provides services Number of Countries in which Entity Operates Number of markets Number of Markets Number of Markets Earnings Per Share [Abstract] Schedule of Details of Net Earnings (Loss) Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Weighted Average Number of Shares Schedule of Weighted Average Number of Shares [Table Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Due From Counterparty [Member] Due From Counterparty [Member] Due From Counterparty [Member] Due To Counterparty [Member] Due To Counterparty [Member] Due To Counterparty [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] June 2023 1257.7 GBP [Member] June 2023 1257.7 GBP [Member] June 2023 1257.7 GBP [Member] October 2018 2155.0 GBP [Member] October 2018 2155.0 GBP [Member] October 2018 2155.0 GBP [Member] October 2018 - June 2023 1200.0 GBP [Member] October 2018 - June 2023 1200.0 GBP [Member] October 2018 - June 2023 1200.0 GBP [Member] January 2021 905.1 GBP [Member] January 2021 905.1 GBP [Member] January 2021 905.1 GBP [Member] January 2021 628.4 GBP [Member] January 2021 628.4 GBP [Member] January 2021 628.4 GBP [Member] February 2022 140.6 GBP [Member] February 2022 140.6 GBP [Member] February 2022 140.6 GBP [Member] April 2023 108.9 GBP [Member] April 2023 108.9 GBP [Member] April 2023 108.9 GBP [Member] June 2022 100.0 GBP [Member] June 2022 100.0 GBP [Member] June 2022 100.0 GBP [Member] October 2022 51.5 GBP [Member] October 2022 51.5 GBP [Member] October 2022 51.5 GBP [Member] January 2022 675.0 USD [Member] January 2022 675.0 USD [Member] January 2022 675.0 USD [Member] July 2016 503.4 EUR [Member] July 2016 503.4 EUR [Member] July 2016 503.4 EUR [Member] July 2020 750.0 EUR [Member] July 2020 500.0 EUR [Member] July 2020 500.0 EUR [Member] July 2016 - January 2021 250.0 EUR [Member] July 2016 - January 2021 250.0 EUR [Member] July 2016 - January 2021 250.0 EUR [Member] September 2022 250.0 EUR [Member] September 2022 250.0 EUR [Member] September 2022 250.0 EUR [Member] July 2016 - January 2023 210.0 EUR [Member] July 2016 - January 2023 210.0 EUR [Member] July 2016 - January 2023 210.0 EUR [Member] January 2022 150.4 EUR [Member] January 2022 150.4 EUR [Member] January 2022 150.4 EUR [Member] July 2016 1,629.8 CHF [Member] July 2016 1,629.8 CHF [Member] July 2016 1,629.8 CHF [Member] July 2016 - September 2022 729.8 CHF [Member] July 2016 - September 2022 729.8 CHF [Member] July 2016 - September 2022 729.8 CHF [Member] July 2016 — January 2021 500.0 CHF 1.65% [Member] January 2015 — January 2021 500.0 CHF 1.65% [Member] January 2015 — January 2021 500.0 CHF 1.65% [Member] July 2016 - January 2018 400.0 CHF [Member] January 2015 - January 2018 400.0 CHF [Member] January 2015 - January 2018 400.0 CHF [Member] June 2021 370.9 CHF [Member] June 2021 370.9 CHF [Member] June 2021 370.9 CHF [Member] November 2016 226.8 CHF [Member] November 2016 226.8 CHF [Member] November 2016 226.8 CHF [Member] November 2016 - November 2021 158.7 CHF [Member] November 2016 - November 2021 158.7 CHF [Member] November 2016 - November 2021 158.7 CHF [Member] November 2016 - June 2021 68.0 CHF [Member] November 2016 - June 2021 68.0 CHF [Member] November 2016 - June 2021 68.0 CHF [Member] January 2022 1,556.0 EUR [Member] January 2022 1,556.0 EUR [Member] January 2022 1,556.0 EUR [Member] January 2017 689.0 EUR [Member] January 2017 689.0 EUR [Member] January 2017 689.0 EUR [Member] January 2021 500.0 EUR [Member] January 2021 500.0 EUR [Member] January 2021 500.0 EUR [Member] July 2016 290.0 EUR [Member] July 2016 461.3 EUR [Member] July 2016 461.3 EUR [Member] July 2016 - January 2023 290.0 EUR [Member] July 2016 - January 2023 290.0 EUR [Member] July 2016 - January 2023 290.0 EUR [Member] March 2021 175.0 EUR [Member] March 2021 175.0 EUR [Member] March 2021 175.0 EUR [Member] July 2016 - January 2022 171.3 EUR [Member] July 2016 - January 2022 171.3 EUR [Member] July 2016 - January 2022 171.3 EUR [Member] January 2023 268.2 EUR [Member] January 2023 268.2 EUR [Member] January 2023 268.2 EUR [Member] June 2023 1,300.0 EUR [Member] June 2023 1,300.0 EUR [Member] June 2023 1,300.0 EUR [Member] July 2017 800.0 EUR [Member] July 2017 800.0 EUR [Member] July 2017 800.0 EUR [Member] July 2017 - June 2022 420.0 EUR [Member] July 2017 - June 2022 420.0 EUR [Member] July 2017 - June 2022 420.0 EUR [Member] July 2017 - June 2023 382.0 EUR [Member] July 2017 - June 2023 382.0 EUR [Member] July 2017 - June 2023 382.0 EUR [Member] June 2022 55.0 EUR [Member] June 2022 55.0 EUR [Member] June 2022 55.0 EUR [Member] December 2022 800.0 USD [Member] December 2022 800.0 USD [Member] December 2022 800.0 USD [Member] October 2016 - January 2022 506.3 USD [Member] October 2016 - January 2022 506.3 USD [Member] October 2016 - January 2022 506.3 USD [Member] October 2016 - January 2019 168.8 USD [Member] October 2016 - January 2019 168.8 USD [Member] October 2016 - January 2019 168.8 USD [Member] Virgin Media Investment Holdings Limited [Member] Virgin Media Investment Holdings Limited [Member] Virgin Media Investment Holdings Limited [Member] UPC Broadband Holding [Member] UPC Broadband Holding [Member] UPC Broadband Holding [Member] Unitymedia Hessen [Member] Unitymedia Hessen [Member] Unitymedia Hessen [Member] Amsterdamse Beheer-en Consultingmaatschappij BV (ABC B.V.), a subsidiary of Ziggo [Member] Amsterdamse Beheer-en Consultingmaatschappij BV (ABC B.V.), a subsidiary of Ziggo [Member] Amsterdamse Beheer-en Consultingmaatschappij BV (ABC B.V.), a subsidiary of Ziggo [Member] Telenet International [Member] Telenet International [Member] Telenet International [Member] Sable [Member] Sable [Member] Sable [Member] Liberty Puerto Rico [Member] Liberty Puerto Rico [Member] Liberty Puerto Rico [Member] Derivative [Line Items] Derivative [Line Items] Notional amount of derivative Derivative, Notional Amount Derivative Interest Rate Derivative Interest Rate Derivative Interest Rate Derivative Interest Rate Referenced Derivative Interest Rate Referenced Derivative Interest Rate Referenced Derivative Interest Rate Above Referenced Rate Derivative Interest Rate Above Referenced Rate Derivative Interest Rate Above Referenced Rate Segment Reporting Segment Reporting Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Programming Commitments [Member] Programming Commitments [Member] Programming Commitments [Member] Network and Connectivity Commitments [Member] Network and Connectivity Commitments [Member] Network and Connectivity Commitments [Member] Purchase Commitments [Member] Purchase Commitments [Member] Purchase Commitments [Member] Operating Leases [Member] Operating Leases [Member] Operating Leases [Member] Other Commitments [Member] Other Commitments [Member] Other Commitments [Member] Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation [Line Items] Remainder of 2016 Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months 2017 Unrecorded Unconditional Purchase Obligation, Due within Two Years 2018 Unrecorded Unconditional Purchase Obligation, Due within Three Years 2019 Unrecorded Unconditional Purchase Obligation, Due within Four Years 2020 Unrecorded Unconditional Purchase Obligation, Due within Five Years 2021 Unrecorded Unconditional Purchase Obligation Balance On Sixth Anniversary Unrecorded Unconditional Purchase Obligation Balance On Sixth Anniversary Thereafter Unrecorded Unconditional Purchase Obligation Balance On Sixth Anniversary And Thereafter Unrecorded unconditional purchase obligation balance on sixth anniversary and thereafter. Total Unrecorded Unconditional Purchase Obligation Long lived Assets Long Lived Assets [Abstract] Long-lived Assets Long Lived Assets Disclosure [Text Block] The entire disclosure for long-lived assets. Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments [Member] Operating Segments [Member] Intersegment Eliminations [Member] Intersegment Eliminations [Member] Corporate and Other [Member] Corporate, Non-Segment [Member] European Operations Division Netherlands [Member] European Operations Division Netherlands [Member] European Operations Division Netherlands [Member] European Operations Division Germany [Member] European Operations Division Germany [Member] European Operations Division Germany [Member] European Operations Division Belgium [Member] European Operations Division Belgium [Member] European Operations Division Belgium [Member] European Operations Division Total Western Europe [Member] European Operations Division Total Western Europe [Member] European Operations Division Total Western Europe [Member] European Operations Division Central and Eastern Europe [Member] European Operations Division Central and Eastern Europe [Member] European Operations Division Central and Eastern Europe [Member] European Operations Division Central and Other [Member] European Operations Division Central and Other [Member] European Operations Division Central and Other [Member] Liberty Global Group [Member] Liberty Global Group [Member] Liberty Global Group [Member] LiLAC Group CWC [Member] LiLAC Group CWC [Member] LiLAC Group CWC [Member] LiLAC Group Chile [Member] LiLAC Group Chile [Member] LiLAC Group Chile [Member] LiLAC Group Puerto Rico [Member] LiLAC Group Puerto Rico [Member] LiLAC Group Puerto Rico [Member] LiLAC Division [Member] LiLAC Division [Member] LiLAC Division [Member] LiLAC Group Corporate and Other [Member] LiLAC Group Corporate and Other [Member] LiLAC Group Corporate and Other [Member] LiLAC Group [Member] LiLAC Group [Member] LiLAC Group [Member] Adjusted OIBDA Adjusted Operating Income (Loss) before Depreciation and Amortization Adjusted Operating Income (Loss) before Depreciation and Amortization Cross-currency and interest rate derivative contracts Cross Currency Interest Rate Contract [Member] Lionsgate Forward [Member] Lionsgate Forward [Member] Lionsgate Forward [Member] ITV Collar [Member] ITV Collar [Member] ITV Collar [Member] Counterparty Credit Risk [Member] Counterparty Credit Risk [Member] Counterparty Credit Risk [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] VM Convertible Senior Notes [Member] VM Convertible Senior Notes [Member] VM Convertible Senior Notes [Member] Sumitomo Share Loan [Member] Sumitomo Share Loan [Member] Sumitomo Share Loan [Member] Valuation adjustment in asset cross currency and interest rate derivative contracts Valuation Adjustment On Credit Risk Asset Derivatives Net Valuation Adjustment On Credit Risk Asset Derivatives Net. Valuation adjustment in liability cross currency and interest rate derivative contracts Valuation Adjustment On Credit Risk Liability Derivatives Net Valuation Adjustment On Credit Risk Liability Derivatives Net. Gain (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 Number of common stock shares owned (in shares) Investment Owned, Balance, Shares Interest rate Debt Instrument, Interest Rate, Stated Percentage Derivative assets Derivative Asset Securities borrowed Securities Borrowed for which No Value is Paid or Credited Accrued Income Taxes [Abstract] Income Taxes Income Tax Disclosure [Text Block] Total segment Adjusted OIBDA Share-based compensation expense Share-based Compensation Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Impairment, restructuring and other operating items, net Restructuring, Settlement and Impairment Provisions Operating income Operating Income (Loss) Interest expense Interest Expense Realized and unrealized gains (losses) on derivative instruments, net Gain (Loss) on Derivative Instruments, Net, Pretax Foreign currency transaction gains (losses), net Foreign Currency Transaction Gain (Loss), before Tax 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 Realized And Unrealized Gains (Losses) Due To Changes In Fair Values of Certain Investments and Debt, Net Losses on debt modification and extinguishment, net Gains (Losses) on Restructuring of Debt Other income (expense), net (note 13) Other Nonoperating Income (Expense) Earnings (loss) before income taxes Income (loss) from continuing operations before income taxes Sum of operating profit and nonoperating income (expense) before income taxes. Debt and Capital Lease Obligations [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Virgin Media Secured Finance [Member] Virgin Media Secured Finance [Member] Virgin Media Secured Finance [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Secured Debt [Member] Secured Debt [Member] August 2026 VM Senior Secured Notes [Member] August 2026 VM Senior Secured Notes [Member] August 2026 VM Senior Secured Notes [Member] VM Facility G [Member] VM Facility G [Member] VM Facility G [Member] VM Facility H [Member] VM Facility H [Member] VM Facility H [Member] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] 2021 Debt Instrument, Redemption, Period Two [Member] 2022 Debt Instrument, Redemption, Period Three [Member] 2023 Debt Instrument, Redemption, Period Four [Member] 2024 and thereafter Debt Instrument, Redemption, Period Five [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] EURIBOR [Member] EURIBOR [Member] EURIBOR [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Principal amount of debt Debt Instrument, Face Amount Additional basis points used to determine redemption premium Additional Basis Points on Discount Rate Used to Calculate Redemption Premium on Debt Instrument Additional basis points on discount rate used to calculate redemption premium on debt instrument. Redemption price Debt Instrument, Redemption Price, Percentage Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Computed “expected” tax benefit (expense) Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Change in valuation allowances: Effective Income Tax Rate Reconciliation, Change in Valuation Allowance, Amount [Abstract] Effective Income Tax Rate Reconciliation, Change in Valuation Allowance, Amount [Abstract] Decrease Effective Income Tax Rate Reconciliation, Decrease in Deferred Tax Assets Valuation Allowance, Amount Effective Income Tax Rate Reconciliation, Decrease in Deferred Tax Assets Valuation Allowance, Amount Increase Effective Income Tax Rate Reconciliation, Increase in Deferred Tax Assets Valuation Allowance, Amount Effective Income Tax Rate Reconciliation, Increase in Deferred Tax Assets Valuation Allowance, Amount Non-deductible or non-taxable foreign currency exchange results: Effective Income Tax Rate Reconciliation, Non-Deductible or Non-Taxable Foreign Currency Exchange Results, Amount [Abstract] Effective Income Tax Rate Reconciliation, Non-Deductible or Non-Taxable Foreign Currency Exchange Results, Amount [Abstract] Increase Effective Income Tax Rate Reconciliation, Increase in Non-Deductible or Non-Taxable Foreign Currency Exchange Results, Amount Effective Income Tax Rate Reconciliation, Increase in Non-Deductible or Non-Taxable Foreign Currency Exchange Results, Amount Decrease Effective Income Tax Rate Reconciliation, Decrease in Non-Deductible or Non-Taxable Foreign Currency Exchange Results, Amount Effective Income Tax Rate Reconciliation, Decrease in Non-Deductible or Non-Taxable Foreign Currency Exchange Results, Amount Tax effect of intercompany financing Income Tax Reconciliation, Tax Effect of Intercompany Financing Income Tax Reconciliation, Tax Effect of Intercompany Financing Basis and other differences in the treatment of items associated with investments in subsidiaries and affiliates: Effective Income Tax Rate Reconciliation, Basis and Other Differences in the Treatment of Items Associated with Investments in Subsidiaries and Affiliates, Amount [Abstract] Effective Income Tax Rate Reconciliation, Basis and Other Differences in the Treatment of Items Associated with Investments in Subsidiaries and Affiliates, Amount [Abstract] Decrease Effective Income Tax Rate Reconciliation, Decrease in Basis and Other Differences in the Treatment of Items Associated with Investments in Subsidiaries and Affiliates, Amount Effective Income Tax Rate Reconciliation, Decrease in Basis and Other Differences in the Treatment of Items Associated with Investments in Subsidiaries and Affiliates, Amount Increase Effective Income Tax Rate Reconciliation, Increase in Basis and Other Differences in the Treatment of Items Associated with Investments in Subsidiaries and Affiliates, Amount Effective Income Tax Rate Reconciliation, Increase in Basis and Other Differences in the Treatment of Items Associated with Investments in Subsidiaries and Affiliates, Amount International rate differences: Effective Income Tax Rate Reconciliation, International Rate Differences, Amount [Abstract] Effective Income Tax Rate Reconciliation, International Rate Differences, Amount [Abstract] Increase Effective Income Tax Rate Reconciliation, Increase in Foreign Income Tax Rate Differential, Amount Effective Income Tax Rate Reconciliation, Increase in Foreign Income Tax Rate Differential, Amount Decrease 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 Non-deductible or non-taxable interest and other expenses: Effective Income Tax Rate Reconciliation, Non-deductible or Non-Taxable Interest and Other Expenses, Amount [Abstract] Effective Income Tax Rate Reconciliation, Non-deductible or Non-Taxable Interest and Other Expenses, Amount [Abstract] Decrease Effective Income Tax Rate Reconciliation, Decrease in Non-deductible or Non-Taxable Interest and Other Expenses, Amount Effective Income Tax Rate Reconciliation, Decrease in Non-deductible or Non-Taxable Interest and Other Expenses, Amount Increase Effective Income Tax Rate Reconciliation, Increase in Non-deductible or Non-Taxable Interest and Other Expenses, Amount Effective Income Tax Rate Reconciliation, Increase in Non-deductible or Non-Taxable Interest and Other Expenses, Amount Recognition of previously unrecognized tax benefits Income Tax Reconciliation, Previously Unrecognized Tax Benefits Income Tax Reconciliation, Previously Unrecognized Tax Benefits Other, net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Total income tax expense Income Tax Expense (Benefit) Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Old Liberty Global [Member] Old Liberty Global [Member] Old Liberty Global [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common stock Common Stock [Member] Additional paid-in capital Additional Paid-in Capital [Member] Accumulated deficit Retained Earnings [Member] Accumulated other comprehensive earnings (loss), net of taxes AOCI Attributable to Parent [Member] Treasury shares, at cost Treasury Stock [Member] Total Liberty Global shareholders Parent [Member] Non-controlling interests Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Other comprehensive loss, net of taxes Other Comprehensive Income (Loss), Net of Tax Impact of the CWC Acquisition (note 3) Stock Issued During Period, Value, Acquisitions Repurchase and cancellation of Liberty Global ordinary shares (note 9) Stock Repurchased and Retired During Period, Value Share-based compensation (note 10) Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Liberty Global call option contracts Adjustments To Additional Paid In Capital, Call Option Contracts Adjustments To Additional Paid In Capital, Call Option Contracts Adjustments due to changes in subsidiaries’ equity and other, net Stockholders' Equity, Other Ending balance Equity [Abstract] Schedule of changes in share capital Schedule of Stockholders Equity [Table Text Block] Equity-related derivative instruments Equity Contract [Member] Sumitomo Collar [Member] Sumitomo Collar [Member] Relating to the Sumitomo Collar Other [Member] Other Equity Related Derivative Instrument [Member] Other Equity Related Derivative Instrument [Member] Foreign Exchange Contract [Member] Foreign Exchange Contract [Member] Other Other Contract [Member] Gain (loss) on derivative instruments, net Derivative, Gain (Loss) on Derivative, Net Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Options, SARs, PSARs, Restricted Shares, and RSUs [Member] Stock Options, SARs, PSARs, Restricted Shares, and RSUs [Member] Stock Options, SARs, PSARs, Restricted Shares, and RSUs [Member] Convertible Debt Securities [Member] Convertible Debt Securities [Member] PSUs / PGUs [Member] Performance Shares [Member] Obligations That May Be Settled in Cash or Shares [Member] Obligations That May Be Settled in Cash or Shares [Member] Obligations That May Be Settled in Cash or Shares [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Aggregate number of shares excluded from computation of EPS Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Unitymedia [Member] Unitymedia [Member] Unitymedia [Member] Telenet [Member] Telenet [Member] Telenet [Member] Virgin Media [Member] Virgin Media [Member] Virgin Media [Member] Other Subsidiaries [Member] Other Subsidiaries [Member] Relating to Other Subsidiaries not otherwise identified. 2016 (remainder of year) Capital Leases, Future Minimum Payments, Remainder of Fiscal Year 2017 Capital Leases, Future Minimum Payments Due in Two Years 2018 Capital Leases, Future Minimum Payments Due in Three Years 2019 Capital Leases, Future Minimum Payments Due in Four Years 2020 Capital Leases, Future Minimum Payments Due in Five Years 2021 Capital Leases, Future Minimum Payments Due in Six Years Contractually required rental payments on leases meeting the criteria for capitalization, due within the fifth year from the balance sheet date. Thereafter Capital Lease Future Minimum Payments Due After Year Six Contractually required rental payments on leases meeting the criteria for capitalization, due after the sixth year from the balance sheet date. Total principal and interest payments Capital Leases, Future Minimum Payments Due Amounts representing interest Capital Leases, Future Minimum Payments, Interest Included in Payments Present value of net minimum lease payments Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments Current portion Capital Lease Obligations, Current Noncurrent portion Capital Lease Obligations, Noncurrent Revenue and Operating Cash Flow by Segment Schedule Of Revenue and Operating Cash Flow Segment Reporting Information By Segment [Table Text Block] Segment Revenue, & OCF year over year comparison. Total Segment Operating Cash Flow to Earnings (Loss) from Continuing Operations before Income Taxes Schedule of Reconciliation of Total Segment Operating Cash Flow From Continuing Operations to Loss From Continuing Operations Before Income Taxes [Table Text Block] Schedule of Reconciliation of Total Segment Operating Cash Flow From Continuing Operations to Loss From Continuing Operations Before Income Taxes [Table Text Block] Schedule of Reporting Capital Expenditures of Reportable Segments Schedule of Reporting Capital Expenditures of Reportable Segments [Table Text Block] Schedule of Reporting Capital Expenditures of Reportable Segments [Table Text Block] Revenue by Major Category Schedule of Revenue by Major Category [Table Text Block] Schedule of Revenue by Major Category [Table Text Block] Geographic Segments Revenue from External Customers by Geographic Areas [Table Text Block] Accounting Changes and Error Corrections [Abstract] Accounting Changes and Recent Accounting Pronouncements Accounting Changes [Text Block] Schedule of Finite-Lived Intangible Assets by Major Class [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships [Member] Customer Relationships [Member] Other Intangible Assets [Member] Other Intangible Assets [Member] Gross carrying amount Finite-Lived Intangible Assets, Gross Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Net carrying amount Finite-Lived Intangible Assets, Net Debt Disclosure [Abstract] Senior Notes [Member] Senior Notes [Member] CWC Notes [Member] CWC Notes [Member] CWC Notes [Member] Columbus and Sable Senior Notes [Member] Columbus and Sable Senior Notes [Member] Columbus and Sable Senior Notes [Member] Columbus Senior Notes [Member] Columbus Senior Notes [Member] Columbus Senior Notes [Member] Sable Senior Notes [Member] Sable Senior Notes [Member] Sable Senior Notes [Member] CWC Senior Notes [Member] CWC Senior Notes [Member] CWC Senior Notes [Member] 2018 Debt Instrument, Redemption, Period One [Member] 2019 2020 2021 and thereafter Estimated fair value Debt Instrument, Fair Value Disclosure Carrying value Long-term Debt Redemption minimum percentage Debt Instrument, Redemption, Minimum Redemption of Principal Debt Instrument, Redemption, Minimum Redemption of Principal Income Statement [Abstract] Revenue (note 14) Operating costs and expenses: Costs and Expenses [Abstract] Operating (other than depreciation and amortization) (including share-based compensation) (note 10) Other Cost and Expense, Operating Selling, general and administrative (SG&A) (including share-based compensation) (note 10) Selling, General and Administrative Expense Depreciation and amortization Impairment, restructuring and other operating items, net (notes 3 and 11) Operating costs and expenses, Total Costs and Expenses Non-operating income (expense): Nonoperating Income (Expense) [Abstract] Realized and unrealized gains (losses) on derivative instruments, net (note 4) Foreign currency transaction gains (losses), net Realized and unrealized gains (losses) due to changes in fair values of certain investments and debt, net (notes 5 and 7) Losses on debt modification and extinguishment, net (note 7) Non-operating income (expense), Total Nonoperating Income (Expense) Earnings (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense (note 8) Net earnings (loss) Net earnings attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net earnings (loss) attributable to Liberty Global shareholders Net Income (Loss) Attributable to Parent Basic and diluted earnings (loss) attributable to Liberty Global shareholders per share (notes 1 and 12): Earnings Per Share, Basic and Diluted [Abstract] Basic and diluted earnings (loss) attributable to Liberty Global shareholders per share (in dollars per share) Earnings Per Share, Basic and Diluted Line of Credit [Member] Line of Credit [Member] CWC Credit Facilities [Member] CWC Credit Facilities [Member] CWC Credit Facilities [Member] CWC Term Loans [Member] CWC Term Loans [Member] CWC Term Loans [Member] CWC Revolving Credit Facility [Member] CWC Revolving Credit Facility [Member] CWC Revolving Credit Facility [Member] CWC Regional Facilities [Member] CWC Regional Facilities [Member] CWC Regional Facilities [Member] London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] Extinguishment of Debt [Axis] Extinguishment of Debt [Axis] Extinguishment of Debt, Type [Domain] Extinguishment of Debt, Type [Domain] Long-term Debt [Member] Long-term Debt [Member] Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Facility amount Line of Credit Facility, Maximum Borrowing Capacity Unused borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Carrying value Long-term Line of Credit Floor rate Debt Instrument, Floor Interest Rate Debt Instrument, Floor Interest Rate Fee on unused portion of credit facility Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Gain on debt modification and extinguishment Gain (Loss) on Extinguishment of Debt Write-off of unamortized debt discount (premium) Write-off of Unamortized Debt Discount (Premium) Write-off of Unamortized Debt Discount (Premium) Payments for debt redemption premium Payments For Debt Redemption Premium Payments For Debt Redemption Premium Business Combinations [Abstract] Acquisition and Joint Venture Transactions Business Combination Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based 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[Member] UPC Facility AC [Member] UPC Facility AD [Member] UPC Facility AD [Member] UPC Facility AD [Member] UPCB Finance VI Notes [Member] UPCB Finance VI Notes [Member] UPCB Finance VI Notes [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Issued at par percentage Debt Instrument, Issued at Par Percentage Debt Instrument, Issued at Par Percentage Percentage of principal amount redeemed Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Extinguishment of debt Extinguishment of Debt, Amount Earnings or Loss per Share Earnings Per Share [Text Block] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Net earnings (loss) attributable to Liberty Global shareholders Weighted average ordinary shares outstanding, Basic Weighted Average Number of Shares Outstanding, Basic Incremental shares attributable to the assumed exercise of outstanding options, SARs and PSARs and the release of share units upon vesting (treasury stock method) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted average ordinary shares outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast [Member] Scenario, Forecast [Member] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Domestic Tax Authority [Member] Domestic Tax Authority [Member] Income Taxes [Line Items] Income Taxes [Line Items] [Line Items] for Income Taxes [Table] Income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Unrecognized tax benefits Unrecognized Tax Benefits Unrecognized tax benefits that would have a favorable impact Unrecognized Tax Benefits that Would Impact Effective Tax Rate Reductions to unrecognized tax benefits, upper bound Increase in Unrecognized Tax Benefits is Reasonably Possible Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Class A [Member] Common Class A [Member] Common Class C [Member] Common Class C [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] CWC [Member] CWC [Member] CWC [Member] BASE [Member] BASE [Member] BASE [Member] Choice Acquisition [Member] Choice Acquisition [Member] Choice Acquisition [Member] Mobile Spectrum [Member] Mobile Spectrum [Member] Mobile Spectrum [Member] Trademarks [Member] Trademarks [Member] Viking Co NV [Member] Viking Co NV [Member] Viking Co NV [Member] Parent Company [Member] Parent Company [Member] Searchlight [Member] Searchlight [Member] Searchlight [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Vodafone Joint Venture [Member] Vodafone Joint Venture [Member] Vodafone Joint Venture [Member] Dutch Joint Venture [Member] Dutch Joint Venture [Member] Dutch Joint Venture [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Ownership interest Equity Method Investment, Ownership Percentage Equalization payment expected Equity Method Investment, Equalization Payments Expected from Co-Investee Equity Method Investment, Equalization Payments Expected from Co-Investee Net leverage ratio required Net Leverage Ratio Required Net Leverage Ratio Required Equity interest (in shares) Business Acquisition, Equity 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percentage by parent Noncontrolling Interest, Ownership Percentage by Parent Percentage of voting interests acquired Business Acquisition, Percentage of Voting Interests Acquired Expected consideration transfered Business Combination, Expected Consideration Transferred Business Combination, Expected Consideration Transferred Net earnings (loss) Summary of stock-based compensation Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Summary of stock compensation not recognized Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block] Schedule of valuation assumptions Schedule of Assumptions Used [Table Text Block] Schedule of stock option activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of other share based compensation activity Schedule of Other Share-based Compensation, Activity [Table Text Block] Equity Stockholders' Equity Note Disclosure [Text Block] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Corporate and Other [Member] Corporate and Other [Member] Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill beginning balance Goodwill Acquisitions and related adjustments Goodwill, Acquired During Period Foreign currency translation adjustments and other Goodwill, Translation and Purchase Accounting Adjustments Goodwill ending balance Interest Rate Cap [Member] Interest Rate Cap [Member] December 2017 0.4 EUR 6.50 Percent [Member] December 2017 0.4 EUR 6.50 Percent [Member] December 2017 0.4 EUR 6.50 Percent [Member] December 2017 0.4 EUR 5.50 Percent [Member] December 2017 0.4 EUR 5.50 Percent [Member] December 2017 0.4 EUR 5.50 Percent [Member] October 2016 - January 2022 258.8 USD [Member] October 2016 - January 2022 258.8 USD [Member] October 2016 - January 2022 258.8 USD [Member] January 2019 - July 2023 177.5 USD [Member] January 2019 - July 2023 177.5 USD [Member] January 2019 - July 2023 177.5 USD [Member] 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Fair Value Disclosures [Abstract] Summary of Assets and Liabilities Measured at Fair Value Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] 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] Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation [Table] Basis of Presentation [Table] Basis of Presentation [Table] Total European Operations Division Europe [Member] Video, Broadband Internet and FIxed-Line Telephony, Mobile and other Communications Services [Member] Video, Broadband Internet and FIxed-Line Telephony, Mobile and other Communications Services [Member] Video, Broadband Internet and FIxed-Line Telephony, Mobile and other Communications Services [Member] The Bahamas Telecommunications Company Limited [Member] The Bahamas Telecommunications Company Limited [Member] The Bahamas Telecommunications Company Limited [Member] Cable & Wireless Jamaica Limited [Member] Cable & Wireless Jamaica Limited [Member] Cable & Wireless Jamaica Limited [Member] Cable & Wireless Panama, SA [Member] Cable & Wireless Panama, SA [Member] Cable & Wireless Panama, SA [Member] Cable & Wireless (Barbados) Limited [Member] Cable & Wireless (Barbados) Limited [Member] Cable & Wireless (Barbados) Limited [Member] Basis of Presentation [Line Items] Basis of Presentation [Line Items] [Line Items] for Basis of Presentation [Table] Percentage ownership in subsidiary Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions Document and Entity Information [Abstract] Document And Entity Information [Abstract] Entities [Table] Entities [Table] Class A Ordinary Shares [Member] Class A Ordinary Shares [Member] Class A Ordinary Shares [Member] Class B Ordinary Shares [Member] Class B Ordinary Shares [Member] Class B Ordinary Shares [Member] Class C Ordinary Shares [Member] Class C Ordinary Shares [Member] Class C Ordinary Shares [Member] Entity Information [Line Items] Entity Information [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Significant unobservable inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value Inputs, Discount Rate Fair Value Inputs, Discount Rate 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] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Investments Investments [Member] Equity-related derivative instruments Derivative Financial Instruments, Liabilities [Member] 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] 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] Balance of net assets at January 1, 2016 Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Liability Net Value This element represents assets and liabilities, net, measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Gains included in net earnings (loss) Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings [Abstract] Realized and unrealized gains on derivative instruments, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset and Liability, Derivative Instrument Gain (Loss) Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset and Liability, Derivative Instrument Gain (Loss) Included in Earnings Realized and unrealized gains due to changes in fair values of certain investments and debt, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset and Liability, Gain (Loss) Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset and Liability, Gain (Loss) Included in Earnings Partial settlement of Sumitomo Collar Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset and Liability, Partial Settlement Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset and Liability, Partial Settlement Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset and Liability, Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset and Liability, Additions Foreign currency translation adjustments and other, net Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Liability Foreign Currency Translation Adjustments Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Liability Foreign Currency Translation Adjustments Balance of net assets at June 30, 2016 Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Refinancing transactions, aggregate borrowings and repayments of debt Non-Cash Borrowings and Repayments of Debt Non-Cash Borrowings and Repayments of Debt Interest Rate Collar [Member] Interest Rate Collar [Member] Interest Rate Collar Minimum rate Derivative, Floor Interest Rate CWC, Choice, and Telenet Group Acquisitions [Member] CWC, Choice, and Telenet Group Acquisitions [Member] CWC, Choice, and Telenet Group Acquisitions [Member] Revenue: Business Acquisition, Pro Forma Revenue Net loss attributable to Liberty Global shareholders Business Acquisition, Pro Forma Net Income (Loss) Basic earnings (loss) attributable to Liberty Global shareholders per share Business Acquisition, Pro Forma Earnings Per Share, Basic Diluted earnings (loss) attributable to Liberty Global shareholders per share Business Acquisition, Pro Forma Earnings Per Share, Diluted Principal Transaction Revenue [Table] Principal Transaction Revenue [Table] Video [Member] Video [Member] Video [Member] Broadband Internet [Member] Broadband Internet [Member] Broadband internet [Member] Telephony [Member] Telephony [Member] Telephony [Member] Cable Subscription [Member] Cable Subscription [Member] Cable Subscription [Member] Mobile [Member] Mobile [Member] Mobile [Member] Total Subscription [Member] Total Subscription [Member] Total Subscription [Member] Business to Business [Member] Business to Business [Member] Business to Business [Member] Other Category [Member] Other Category [Member] Other Category [Member] Total Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Foreign currency forward contracts Foreign Exchange Forward [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Assets: Derivative Asset [Abstract] Current Derivative Asset, Current Long-term Derivative Asset, Noncurrent Total Liabilities: Derivative Liability [Abstract] Current Derivative Liability, Current Long-term Derivative Liability, Noncurrent Total Derivative Liability Schedule of Business Acquisitions, by Acquisition Schedule of Business Acquisitions, by Acquisition [Table Text Block] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Pro Forma Information for Significant Acquisitions Business Acquisition, Pro Forma Information [Table Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Common Class B [Member] Common Class B [Member] Class of Stock [Line Items] Class of Stock [Line Items] Shares purchased pursuant to repurchase programs (in shares) Stock Repurchased and Retired During Period, Shares Average price paid per share pursuant to repurchase programs (in dollars per share) Treasury Stock Acquired, Average Cost Per Share Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Geography Eliminations [Member] Geography Eliminations [Member] U.K. UNITED KINGDOM The Netherlands NETHERLANDS Belgium BELGIUM Germany GERMANY Switzerland SWITZERLAND Ireland IRELAND Poland POLAND Austria AUSTRIA [Member] AUSTRIA [Member] Hungary HUNGARY The Czech Republic CZECH REPUBLIC Romania ROMANIA Slovakia SLOVAKIA Other Other Europe [Member] Other Europe [Member] Panama PANAMA Jamaica JAMAICA Bahamas BAHAMAS Barbados BARBADOS Trinidad and Tobago TRINIDAD AND TOBAGO Other Other Latin America and the Caribbean [Member] Other Latin America and the Caribbean [Member] Chile CHILE Puerto Rico PUERTO RICO Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Ziggo Group Holding [Member] Ziggo Group Holding [Member] Ziggo Group Holding [Member] UPC Holding [Member] UPC Holding [Member] UPC Holding [Member] VTR [Member] VTR [Member] VTR [Member] 2016 (remainder of year) Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2017 Long-term Debt, Maturities, Repayments of Principal in Year Two 2018 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Thereafter Long Term Debt Maturities Repayments of Principal after Year Six Amount of long-term debt maturities after year six following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates. 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Accounting Changes and Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Number of shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Outstanding at beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Performance adjustment (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Released from restrictions (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Released from Restrictions in Period The number of equity-based payment instruments, excluding stock (or unit) options, that were released from restrictions during the reporting period. Outstanding at end of period (in shares) Weighted average grant-date fair value per share of awards granted: Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Outstanding at beginning of period (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per shares) Performance adjustment (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Adjustment, Weighted Average Grant Date Fair Value Forfeited (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Released from restrictions (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Released From Restrictions in Period, Weighted Average Grant Date Fair Value The weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were released from restrictions during the period. Outstanding at end of period (in dollars per shares) Weighted average remaining contractual term, in years Weighted average remaining term [Abstract] Weighted average remaining term Outstanding at end of period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Share-based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Foreign Currency Forward 1 [Member] Foreign Currency Forward 1 [Member] Foreign Currency Forward 1 [Member] Foreign Currency Forward 2 [Member] Foreign Currency Forward 2 [Member] Foreign Currency Forward 2 [Member] Foreign Currency Forward 3 [Member] Foreign Currency Forward 3 [Member] Foreign Currency Forward 3 [Member] Foreign Currency Forward 4 [Member] Foreign Currency Forward 4 [Member] Foreign Currency Forward 4 [Member] Foreign Currency Forward 5 [Member] Foreign Currency Forward 5 [Member] Foreign Currency Forward 5 [Member] Foreign Currency Forward 6 [Member] Foreign Currency Forward 6 [Member] Foreign Currency Forward 6 [Member] Foreign Currency Forward 7 [Member] Foreign Currency Forward 7 [Member] Foreign Currency Forward 7 [Member] Foreign Currency Forward 8 [Member] Foreign Currency Forward 8 [Member] Foreign Currency Forward 8 [Member] Foreign Currency Forward 9 [Member] Foreign Currency Forward 9 [Member] Foreign Currency Forward 9 [Member] Foreign Currency Forward 10 [Member] Foreign Currency Forward 10 [Member] Foreign Currency Forward 10 [Member] Foreign Currency Forward 11 [Member] Foreign Currency Forward 11 [Member] Foreign Currency Forward 11 [Member] Foreign Currency Forward 12 [Member] Foreign Currency Forward 12 [Member] Foreign Currency Forward 12 [Member] Foreign Currency Forward 13 [Member] Foreign Currency Forward 13 [Member] Foreign Currency Forward 13 [Member] Foreign Currency Forward 14 [Member] Foreign Currency Forward 14 [Member] Foreign Currency Forward 14 [Member] Foreign Currency Forward 15 [Member] Foreign Currency Forward 15 [Member] Foreign Currency Forward 15 [Member] Foreign Currency Forward 16 [Member] Foreign Currency Forward 16 [Member] Foreign Currency Forward 16 [Member] Liberty Global Challenge Performance Awards [Member] Liberty Global Challenge Performance Awards [Member] Liberty Global Challenge Performance Awards [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] April 1, 2019 and October 1, 2019 [Member] April 1, 2019 and October 1, 2019 [Member] April 1, 2019 and October 1, 2019 [Member] June 1, 2017 [Member] June 1, 2017 [Member] June 1, 2017 [Member] June 1, 2018 [Member] June 1, 2018 [Member] June 1, 2018 [Member] Award performance period Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Period Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Period Target performance Share-based Compensation Arrangement by Share-based Payment Award, Target Performance, Operating Cash Flow Compound Annual Growth Rate Share-based Compensation Arrangement by Share-based Payment Award, Target Performance, Operating Cash Flow Compound Annual Growth Rate Performance range Share Based Compensation Performance Range The minimums and maximums of a performance range, expressed as a financial ratio, affecting share -based compensation. Expected performance earnings Expected Performance Earnings Percentage For Psus Expected actual performance earnings percentage for PSUs, as of the balance sheet date. Vesting rights Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Other than options granted in period (in shares) Performance earned Share-based Compensation Arrangement by Share-based Payment Award, Performance Adjustment Share-based Compensation Arrangement by Share-based Payment Award, Performance Adjustment Restructuring and Related Activities [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] U.K. / Ireland [Member] U.K. / Ireland [Member] U.K. / Ireland [Member] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Employee severance and termination [Member] Employee Severance [Member] Office closures [Member] Facility Closing [Member] Contract termination and other [Member] Contract Termination and Other [Member] Contract Termination and Other [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Restructuring liability as of January 1, 2016 Restructuring Reserve Restructuring charges Restructuring Charges Cash paid Payments for Restructuring CWC and BASE liability at acquisition date Restructuring Reserve, Accrual Adjustment Foreign currency translation adjustments and other Restructuring Reserve, Foreign Currency Translation Gain (Loss) Restructuring liability as of June 30, 2016 Current portion Restructuring Reserve, Current Noncurrent portion Restructuring Reserve, Noncurrent Total Restructuring Liability Restructuring and Related Activities Disclosure [Text Block] Subsequent Event Subsequent Events [Text Block] Schedule of PP&E Property, Plant and Equipment [Table Text Block] Schedule of Changes in Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] Schedule of Intangible Assets Subject to Amortization, Net Schedule of Finite-Lived Intangible Assets [Table Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingencies by Nature of Contingency [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Interkabel Acquisition [Member] Interkabel Acquisition [Member] Interkabel Acquisition [Member] Deutsche Telekom Litigation [Member] Deutsche Telekom Litigation [Member] Deutsche Telekom Litigation [Member] Vivendi Litigation [Member] Vivendi Litigation [Member] Vivendi Litigation [Member] Belgium Regulatory Developments [Member] Belgium Regulatory Developments [Member] Belgium Regulatory Developments [Member] Financial Transactions Tax [Member] Financial Transactions Tax [Member] Financial Transactions Tax [Member] Virgin Media VAT Matters [Member] Virgin Media VAT Matters [Member] Virgin Media VAT Matters [Member] Virgin Media VAT Matters 2 [Member] Virgin Media VAT Matters 2 [Member] Virgin Media VAT Matters 2 [Member] Hungary VAT Matter [Member] Hungary VAT Matter [Member] Hungary VAT Matter [Member] Mobistar MVNO Agreement [Member] Mobistar MVNO Agreement [Member] Mobistar MVNO Agreement [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] Liberty Media [Member] Liberty Media [Member] Liberty Media [Member] Subsegments [Axis] Subsegments [Axis] Subsegments [Domain] Subsegments [Domain] Broadband Communications and DHT Operations [Member] Broadband Communications and DHT Operations [Member] Broadband Communications and DHT Operations [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Programming costs Programming Costs Programming Costs Number of associations of municipalities in Belgium Number of Associations of Municipalities in Belgium Number of Associations of Municipalities in Belgium Loss contingency damages in excess value Loss Contingency Damages In Excess Value Loss Contingency Damages In Excess Value Damages sought Loss Contingency, Damages Sought, Value Proceeds from legal settlements Proceeds from Legal Settlements Reduction of annual lease fees Reduction of Annual Lease Fees Reduction of Annual Lease Fees Retail-Minus Tariffs for Basic TV Retail-Minus Tariffs for Basic TV Retail-Minus Tariffs for Basic TV Retail-Minus Tariffs for Bundle of Basic TV and Broadband Internet Services Retail-Minus Tariffs for Bundle of Basic TV and Broadband Internet Services Retail-Minus Tariffs for Bundle of Basic TV and Broadband Internet Services Amended Retail-Minus Tariffs Term Amended Retail-Minus Tariffs Term Amended Retail-Minus Tariffs Term Financial transactions tax Financial Transactions Tax Financial Transactions Tax Estimate of possible loss Loss Contingency, Estimate of Possible Loss Net cash paid for taxes Income Taxes Paid Interest expense Income Tax Examination, Interest Expense Unpaid VAT payment assessed Loss Contingency, Unpaid VAT Payment Assessed Loss Contingency, Unpaid VAT Payment Assessed Loss contingency accrual Loss Contingency Accrual Commitment term Commitment Term Commitment Term Interest Rate Swap [Member] Interest Rate Swap [Member] 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 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. 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. Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Trade receivables, net Accounts Receivable, Net, Current Derivative instruments (note 4) Prepaid expenses Prepaid Expense, Current Other current assets Other Assets, Current Total current assets Assets, Current Investments (including $1,961.7 million and $2,591.8 million, respectively, measured at fair value) (note 5) Long-term Investments Property and equipment, net (note 6) Property, Plant and Equipment, Net Goodwill (note 6) Intangible assets subject to amortization, net (note 6) Other assets, net (note 4) Other Assets, Noncurrent Total assets Assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Deferred revenue and advance payments from subscribers and others Deferred Revenue, Current Current portion of debt and capital lease obligations (notes 5 and 7) Debt, Current Accrued interest Interest Payable, Current Derivative instruments (note 4) Accrued income taxes Accrued Income Taxes, Current Accrued capital expenditures Accrued Capital Expenditures, Current Accrued Capital Expenditures, Current Other accrued and current liabilities (note 11) Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Long-term debt and capital lease obligations (notes 5 and 7) Long-term Debt and Capital Lease Obligations Other long-term liabilities (notes 4 and 11) Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (notes 3, 4, 7, 8, 13 and 15) Commitments and Contingencies Equity (note 9): Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Liberty Global shareholders: Stockholders' Equity Attributable to Parent [Abstract] Common stock Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive earnings (loss), net of taxes Accumulated Other Comprehensive Income (Loss), Net of Tax Treasury shares, at cost Treasury Stock, Value Total Liberty Global shareholders Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Total liabilities and equity Liabilities and Equity Pro Forma [Member] Pro Forma [Member] VM Notes [Member] VM Notes [Member] VM Notes [Member] VM Credit Facility [Member] VM Credit Facility [Member] VM Credit Facility [Member] Ziggo Credit Facility [Member] Ziggo Credit Facility [Member] Ziggo Credit Facility [Member] Ziggo SPE Notes [Member] Ziggo SPE Notes [Member] Ziggo SPE Notes [Member] Ziggo Notes [Member] Ziggo Notes [Member] Ziggo Notes [Member] Unitymedia Notes [Member] Unitymedia Notes [Member] Unitymedia Notes [Member] Unitymedia Revolving Credit Facilities [Member] Unitymedia Revolving Credit Facilities [Member] Unitymedia Revolving Credit Facilities [Member] UPCB SPE Notes Debt [Member] UPCB SPE Notes Debt [Member] UPCB SPE Notes Debt [Member] UPC Broadband Holding Bank Facility [Member] UPC Broadband Holding Bank Facility Debt [Member] UPC Broadband Holding Bank Facility Debt [Member] VM Revolving Credit Facility [Member] VM Revolving Credit Facility [Member] VM Revolving Credit Facility [Member] UPC Holding Senior Notes [Member] UPC Holding Senior Notes Debt [Member] UPC Holding Senior Notes Debt [Member] Telenet Credit Facility [Member] Telenet Credit Facility [Member] Telenet Credit Facility [Member] Telenet SPE Notes [Member] Telenet SPE Notes [Member] Telenet SPE Notes [Member] VTR Senior Secured Notes [Member] VTR Senior Secured Notes [Member] VTR Senior Secured Notes [Member] VTR Credit Facility [Member] VTR Credit Facility [Member] VTR Credit Facility [Member] VTR Credit Facility [Member] VTR CLP Credit Facility [Member] VTR CLP Credit Facility [Member] Sumitomo Collar Loan [Member] Sumitomo Collar Loan Debt [Member] Sumitomo Collar Loan Debt [Member] ITV Collar Loan [Member] ITV Collar Loan [Member] ITV Collar Loan [Member] Liberty Puerto Rico Bank Facility [Member] Liberty Puerto Rico Bank Facility Debt [Member] Liberty Puerto Rico Bank Facility Debt [Member] Vendor Financing [Member] Vendor Financing [Member] Vendor Financing [Member] VTR Dollar Credit Facility [Member] VTR Dollar Credit Facility [Member] VTR Dollar Credit Facility [Member] Other Debt [Member] Other Debt [Member] Other Debt [Member] Aggregate Variable and Fixed Rate Indebtedness [Member] Aggregate Variable and Fixed Rate Indebtedness [Member] Aggregate Variable And Fixed Rate Indebtedness [Member] Telenet Credit Facility Z [Member] Telenet Credit Facility Z [Member] Telenet Credit Facility Z [Member] Telenet Credit Facility AA [Member] Telenet Credit Facility AA [Member] Telenet Credit Facility AA [Member] Telenet Credit Facility X [Member] Telenet Credit Facility X [Member] Telenet Credit Facility X [Member] Third-Party Debt [Member] Third-Party Debt [Member] Third-Party Debt [Member] UnityMedia KabelBW [Member] UnityMedia KabelBW [Member] UnityMedia KabelBW [Member] Ziggo Secured Finance [Member] Ziggo Secured Finance [Member] Ziggo Secured Finance [Member] Significant other observable inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Weighted average interest rate Debt, Weighted Average Interest Rate Unused borrowing capacity Debt Instrument, Unused Borrowing Capacity, Amount Total debt before unamortized premiums, discounts and deferred financing costs Long-term Debt, Gross Unamortized premiums (discounts), net Total debt Capital lease obligations Capital Lease Obligations Total debt and capital lease obligations Long-term Debt and Capital Lease Obligations, Including Current Maturities Current maturities of debt and capital lease obligations Long-term Debt and Capital Lease Obligations, Current Long-term debt and capital lease obligations Limitation on availability Line of Credit Facility, Current Borrowing Capacity Loans receivable Loans Receivable, Net Ownership percentage of special purpose financing entity Ownership Percentage of Special Purpose Financing Entity Ownership Percentage of Special Purpose Financing Entity General term of vendor financing arrangements General Term of Vendor Financing Arrangements for Amounts Due General Term of Vendor Financing Arrangements for Amounts Due Debt fair value Long-term Debt, Fair Value Number of shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Options outstanding at beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Options cancelled/forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Options exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Options outstanding at end of period (in shares) Options exercisable at end of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Options outstanding at beginning of period (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options granted (in dollars per shares) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Options cancelled/forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Options exercised (in dollars per shares) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Options outstanding at end of period (in dollars per shares) Options exercisable at end of period (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Options outstanding at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Options exercisable at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Total intrinsic value of awards exercised (in millions): Aggregate intrinsic value [Abstract] Aggregate intrinsic value Options outstanding at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Options exercisable at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Quoted prices in active markets for identical assets (Level 1) Fair Value, Inputs, Level 1 [Member] Derivative instruments Total assets Assets, Fair Value Disclosure Derivative instruments Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Summary of changes in restructuring liability Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment by Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Distribution Systems [Member] Distribution Systems [Member] Distribution Systems [Member] Customer Premises Equipment [Member] Customer Premises Equipment [Member] Customer Premises Equipment [Member] Support Equipment, Buildings and Land [Member] Support Equipment, Buildings and Land [Member] Support Equipment, Buildings and Land [Member] Property and equipment, gross Property, Plant and Equipment, Gross Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Total property and equipment, net Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Share-based compensation expense Impairment, restructuring and other operating items, net Amortization of deferred financing costs and non-cash interest accretion Amortization of Debt Issuance Costs and Discounts Realized and unrealized losses (gains) on derivative instruments, net Foreign currency transaction losses (gains), net Realized and unrealized losses (gains) due to changes in fair values of certain investments and debt, including impact of dividends Realized and Unrealized Losses (Gains) due to Changes in Fair Values of Certain Investments and Debt, Including Impact of Dividends Realized and Unrealized Losses (Gains) due to Changes in Fair Values of Certain Investments and Debt, Including Impact of Dividends Losses on debt modification and extinguishment, net Deferred income tax benefit Deferred Income Tax Expense (Benefit) Excess tax benefit from share-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Changes in operating assets and liabilities, net of the effects of acquisitions and dispositions Increase (Decrease) in Operating Capital Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Cash paid in connection with acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Capital expenditures Payments to Acquire Productive Assets Investments in and loans to affiliates and others Payments to Acquire Interest in Subsidiaries and Affiliates Other investing activities, net Payments for (Proceeds from) Other Investing Activities Net cash used by investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Borrowings of debt Proceeds from Issuance of Long-term Debt Repayments and repurchases of debt and capital lease obligations Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Repurchase of Liberty Global ordinary shares Payments for Repurchase of Common Stock Change in cash collateral Change in Cash Collateral Change in cash collateral. Payment of financing costs and debt premiums Payment Of Deferred Financing Costs Debt Premiums And Exchange Offer Consideration Payment Of Deferred Financing Costs Debt Premiums And Exchange Offer Consideration Net cash paid related to derivative instruments Payments for (Proceeds from) Hedge, Financing Activities Net cash received (paid) associated with call option contracts on Liberty Global ordinary shares Net Cash Proceeds (Payments) associated with call Option Contracts Net Cash Proceeds (Payments) associated with call Option Contracts Purchase of additional shares of subsidiaries Payments to Acquire Additional Interest in Subsidiaries Other financing activities, net Proceeds from (Payments for) Other Financing Activities Net cash provided (used) by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents: Cash and Cash Equivalents, at Carrying Value [Abstract] Beginning of period End of period Cash paid for interest Interest Paid Statement of Comprehensive Income [Abstract] Other comprehensive earnings (loss), net of taxes: Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Reclassification adjustments included in net earnings (loss) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax 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 Other comprehensive earnings (loss) Comprehensive earnings (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive earnings attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive earnings (loss) attributable to Liberty Global shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Property and equipment, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Goodwill Intangible assets subject to amortization, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Franchise rights Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Franchise Rights Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Franchise Rights Other assets, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Current portion of debt and capital lease obligations Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt Other accrued and current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Long-term debt and capital lease obligations Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Other long-term liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Noncontrolling interests Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Non-current deferred tax liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Total purchase price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Total purchase price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest Debt and Capital Lease Obligations Debt Disclosure [Text Block] January 2023 400.0 USD 339.6 GBP [Member] January 2023 400.0 USD 339.6 GBP [Member] January 2023 400.0 USD 339.6 GBP [Member] February 2022 1400.0 USD 935.9 GBP [Member] February 2022 2208.5 USD 1378.7 GBP [Member] February 2022 2208.5 USD 1378.7 GBP [Member] June 2023 1855.0 USD 1198.3 GBP [Member] June 2023 1855.0 USD 1198.3 GBP [Member] June 2023 1855.0 USD 1198.3 GBP [Member] January 2023 1000.0 USD 648.6 GBP [Member] January 2023 1000.0 USD 648.6 GBP [Member] January 2023 1000.0 USD 648.6 GBP [Member] August 2024 750.0 USD 527.0 GBP [Member] August 2024 750.0 USD 527.0 GBP [Member] August 2024 750.0 USD 527.0 GBP [Member] January 2023 480.0 USD 299.1 GBP [Member] January 2023 480.0 USD 299.1 GBP [Member] January 2023 480.0 USD 299.1 GBP [Member] January 2022 - April 2023 4750.0 USD 295.6 GBP [Member] January 2022 - April 2023 4750.0 USD 295.6 GBP [Member] January 2022 - April 2023 4750.0 USD 295.6 GBP [Member] October 2022 450.0 USD 272.0 GBP [Member] October 2022 450.0 USD 272.0 GBP [Member] October 2022 450.0 USD 272.0 GBP [Member] January 2021 447.9 USD 276.7 GBP [Member] January 2021 447.9 USD 276.7 GBP [Member] January 2021 447.9 USD 276.7 GBP [Member] January 2022 425.0 USD 255.8 GBP [Member] January 2022 425.0 USD 255.8 GBP [Member] January 2022 425.0 USD 255.8 GBP [Member] January 2022 - January 2025 425.0 USD 255.8 GBP [Member] January 2022 - January 2025 425.0 USD 255.8 GBP [Member] January 2022 - January 2025 425.0 USD 255.8 GBP [Member] April 2019 191.5 USD 122.3 GBP [Member] April 2019 191.5 USD 122.3 GBP [Member] April 2019 191.5 USD 122.3 GBP [Member] April 2019 - February 2022 191.5 USD 122.3 GBP [Member] April 2019 - February 2022 191.5 USD 122.3 GBP [Member] April 2019 - February 2022 191.5 USD 122.3 GBP [Member] October 2019 100.0 USD 65.4 GBP [Member] October 2019 100.0 USD 65.4 GBP [Member] October 2019 100.0 USD 65.4 GBP [Member] November 2016 55.0 USD 27.7 GBP [Member] November 2016 55.0 USD 27.7 GBP [Member] November 2016 55.0 USD 27.7 GBP [Member] October 2019 - October 2022 50.0 USD 30.7 GBP [Member] October 2019 - October 2022 50.0 USD 30.7 GBP [Member] October 2019 - October 2022 50.0 USD 30.7 GBP [Member] October 2019 - April 2023 50.0 USD 30.3 GBP [Member] October 2019 - April 2023 50.0 USD 30.3 GBP [Member] October 2019 - April 2023 50.0 USD 30.3 GBP 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January 2017 75.0 EUR 110.9 CHF [Member] July 2021 70.1 EUR 84.8 CHF [Member] July 2021 70.1 EUR 84.8 CHF [Member] July 2021 70.1 EUR 84.8 CHF [Member] January 2020 318.9 EUR 8818.7 CZK [Member] January 2020 318.9 EUR 8818.7 CZK [Member] January 2020 318.9 EUR 8818.7 CZK [Member] January 2017 60.0 EUR 1703.1 CZK [Member] January 2017 60.0 EUR 1703.1 CZK [Member] January 2017 60.0 EUR 1703.1 CZK [Member] July 2017 39.6 EUR 1,000.0 CZK [Member] July 2017 39.6 EUR 1,000.0 CZK [Member] July 2017 39.6 EUR 1,000.0 CZK [Member] July 2016 260.0 EUR 75570.0 HUF [Member] January 2015 260.0 EUR 75570.0 HUF [Member] January 2015 260.0 EUR 75570.0 HUF [Member] July 2016 - December 2021 260.0 EUR 75570.0 HUF [Member] July 2016 - December 2021 260.0 EUR 75570.0 HUF [Member] July 2016 - December 2021 260.0 EUR 75570.0 HUF [Member] December 2021 150.0 EUR 43,367.5 HUF [Member] December 2021 150.0 EUR 43,367.5 HUF [Member] December 2021 150.0 EUR 43,367.5 HUF [Member] July 2018 78Euro 19500Huf [Member] July 2018 78Euro 19500Huf [Member] July 2018 78Euro 19500Huf [Member] January 2022 245.0 EUR 1000.6 PLN [Member] January 2022 245.0 EUR 1000.6 PLN [Member] January 2022 245.0 EUR 1000.6 PLN [Member] September 2016 200.0 EUR 892.7 PLN [Member] September 2016 200.0 EUR 892.7 PLN [Member] September 2016 200.0 EUR 892.7 PLN [Member] July 2016 - January 2022 180.0 EUR 788.2 PLN [Member] July 2016 - January 2022 180.0 EUR 788.2 PLN [Member] July 2016 - January 2022 180.0 EUR 788.2 PLN [Member] January 2020 144.6 EUR 605.0 PLN [Member] January 2020 144.6 EUR 605.0 PLN [Member] January 2020 144.6 EUR 605.0 PLN [Member] July 2017 82.0 EUR 318.0 PLN [Member] July 2017 82.0 EUR 318.0 PLN [Member] July 2017 82.0 EUR 318.0 PLN [Member] January 2022 2,350.0 USD 1,819.0 EUR [Member] January 2022 2,350.0 USD 1,819.0 EUR [Member] January 2022 2,350.0 USD 1,819.0 EUR [Member] January 2023 400.0 USD 339.0 EUR [Member] January 2023 400.0 USD 339.0 EUR [Member] January 2023 400.0 USD 339.0 EUR [Member] January 2023 2,450.0 USD 1,799.0 EUR [Member] January 2023 2,450.0 USD 1,799.0 EUR [Member] January 2023 2,450.0 USD 1,799.0 EUR [Member] June 2024 850.0 USD 743.3 EUR [Member] June 2024 850.0 USD 743.3 EUR [Member] June 2024 850.0 USD 743.3 EUR [Member] July 2016 - December 2022 78.3 USD 10000.0 JMD [Member] July 2016 - December 2022 78.3 USD 10000.0 JMD [Member] July 2016 - December 2022 78.3 USD 10000.0 JMD [Member] January 2022 1,400.0 USD 760,340.0 CLP [Member] January 2022 1,400.0 USD 760,340.0 CLP [Member] January 2022 1,400.0 USD 760,340.0 CLP [Member] 5.5% Unitymedia Senior Secured Notes [Member] 5.5% Unitymedia Senior Secured Notes [Member] 5.5% Unitymedia Senior Secured Notes [Member] 5.125% Unitymedia Senior Secured Notes [Member] 5.125% Unitymedia Senior Secured Notes [Member] 5.125% Unitymedia Senior Secured Notes [Member] 4.625% Unitymedia Senior Secured Notes [Member] 4.625% Unitymedia Senior Secured Notes [Member] 4.625% Unitymedia Senior Secured Notes [Member] UM Senior Secured Notes Redeemed [Member] UM Senior Secured Notes Redeemed [Member] UM Senior Secured Notes Redeemed [Member] Loss on debt modification and extinguishment Write-off of deferred financing costs Write off of Deferred Debt Issuance Cost Fair Value Measurements Fair Value Disclosures [Text Block] Telenet Financing USD LLC [Member] Telenet Financing USD LLC [Member] Telenet Financing USD LLC [Member] Telenet Facility AD [Member] Telenet Facility AD [Member] Telenet Facility AD [Member] Telenet Credit Facility P [Member] Telenet Credit Facility P [Member] Telenet Credit Facility P [Member] Telenet Credit Facility O [Member] Telenet Credit Facility O [Member] Telenet Credit Facility O [Member] 6.625 Telenet Senior Secured Notes [Member] 6.625 Telenet Senior Secured Notes [Member] 6.625 Telenet Senior Secured Notes [Member]