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January 2021 VM Sterling Senior Secured Notes [Member] January 2021 VM Dollar Senior Secured Notes [Member] January 2021 VM Dollar Senior Secured Notes [Member] January 2021 VM Dollar Senior Secured Notes [Member] April 2021 VM Sterling Senior Secured Notes [Member] April 2021 VM Sterling Senior Secured Notes [Member] April 2021 VM Sterling Senior Secured Notes [Member] April 2021 VM Dollar Senior Secured Notes [Member] April 2021 VM Dollar Senior Secured Notes [Member] April 2021 VM Dollar Senior Secured Notes [Member] 2025 VM 5.5% Sterling Senior Secured Notes [Member] 2025 VM 5.5% Sterling Senior Secured Notes [Member] 2025 VM 5.5% Sterling Senior Secured Notes [Member] 2025 VM Dollar Senior Secured Notes [Member] 2025 VM Dollar Senior Secured Notes [Member] 2025 VM Dollar Senior Secured Notes [Member] 2025 VM 5.125% Sterling Senior Secured Notes [Member] 2025 VM 5.125% Sterling Senior Secured Notes [Member] 2025 VM 5.125% Sterling Senior Secured Notes [Member] 2026 VM Senior Secured Notes [Member] 2026 VM Senior Secured Notes [Member] 2026 VM Senior Secured Notes [Member] 2027 VM Senior Secured Notes [Member] 2027 VM Senior Secured Notes [Member] 2027 VM Senior Secured Notes [Member] 2029 VM Senior Secured Notes [Member] 2029 VM Senior Secured Notes [Member] 2029 VM Senior Secured Notes [Member] Original 2026 VM Senior Secured Notes [Member] Original 2026 VM Senior Secured Notes [Member] Original 2026 VM Senior Secured Notes [Member] Additional 2026 VM Senior Secured Notes [Member] Additional 2026 VM Senior Secured Notes [Member] Additional 2026 VM Senior Secured Notes [Member] VM Senior Secured Notes Redeemed [Member] VM Senior Secured Notes Redeemed [Member] VM Senior Secured Notes Redeemed [Member] VM Credit Facility A [Member] VM Credit Facility A [Member] VM Credit Facility A [Member] VM Credit Facility B [Member] VM Credit Facility B [Member] VM Credit Facility B [Member] VM Senior Notes [Member] VM Senior Notes [Member] VM Senior Notes [Member] Extinguishment of Debt [Axis] Extinguishment of Debt [Axis] Extinguishment of Debt, Type [Domain] Extinguishment of Debt, Type [Domain] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] 2020 Debt Instrument, Redemption, Period One [Member] 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] Debt Instrument [Line Items] Debt Instrument [Line Items] Interest rate Debt Instrument, Interest Rate, Stated Percentage Principal amount of debt Debt Instrument, Face Amount Estimated fair value Debt Instrument, Fair Value Disclosure Carrying value Long-term Debt Percentage of principal amount redeemed Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Extinguishment of debt Extinguishment of Debt, Amount Redemption term Debt Instrument, Redemption Term Debt Instrument, Redemption Term Redemption price Debt Instrument, Redemption Price, Percentage Percentage of principal amount limitation Debt Instrument, Redemption Price, Percentage of Principal Amount Limitation Debt Instrument, Redemption Price, Percentage of Principal Amount Limitation Debt acceleration covenant threshold for event of default Debt Acceleration Covenant Threshold for Event of Default Debt Acceleration Covenant Threshold for Event of Default 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. Mandatory redemption price on senior Notes in event that certain assets sold or specific control changed Mandatory Redemption Price Expressed as Percentage of Principal Amount on Senior Notes in Event that Certain Assets Sold or Specific Control Changed Mandatory redemption price expressed as percentage of principal amount on senior notes in event that certain assets sold or specific control changed Loss on debt modification and extinguishment Gains (Losses) on Extinguishment of Debt Write-off of deferred financing costs Write off of Deferred Debt Issuance Cost Payments for debt redemption premium Payments For Debt Redemption Premium Payments For Debt Redemption Premium Write-off of unamortized debt discount (premium) Write-off of Unamortized Debt Discount (Premium) Write-off of Unamortized Debt Discount (Premium) Issued at par percentage Debt Instrument, Issued at Par Percentage Debt Instrument, Issued at Par Percentage Long lived Assets Long Lived Assets [Abstract] Noncash vendor financing arrangement, cash increase, excluding value added tax Noncash Vendor Financing Arrangement, Cash Increase, Excluding Value Added Tax Noncash Vendor Financing Arrangement, Cash Increase, Excluding Value Added Tax Value added tax, vendor financing arrangement Value Added Tax, Vendor Financing Arrangement Value Added Tax, Vendor Financing Arrangement Capital leases Capital Lease Obligations Incurred Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] PSUs / PGUs [Member] Performance Shares [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] 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) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value 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 Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] 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 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 Switzerland / Austria [Member] European Operations Division Switzerland / Austria [Member] European Operations Division Switzerland / Austria [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] Total European Operations Division [Member] Total European Operations Division [Member] Total European Operations Division [Member] Corporate and Other [Member] Corporate and Other [Member] Liberty Global Group [Member] Liberty Global Group [Member] Liberty Global Group [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 Group [Member] LiLAC Group [Member] LiLAC Group [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Total property and equipment additions Property, Plant and Equipment, Additions Assets acquired under capital-related vendor financing arrangements Assets Acquired Under Capital-Related Vendor Financing Arrangements Assets Acquired Under Capital-Related Vendor Financing Arrangements Assets acquired under capital leases Changes in current liabilities related to capital expenditures Increase Decrease in Current Liabilities Related to Capital Expenditures Increase Decrease in Current 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[Member] January 2013 UM Senior Secured Notes [Member] January 2013 UM Senior Secured Notes [Member] January 2013 UM Senior Secured Notes [Member] April 2013 UM Senior Secured Notes [Member] April 2013 UM Senior Secured Notes [Member] April 2013 UM Senior Secured Notes [Member] November 2013 UM Senior Secured Notes [Member] November 2013 UM Senior Secured Notes [Member] November 2013 UM Senior Secured Notes [Member] October 2014 UM Senior Notes [Member] October 2014 UM Senior Notes [Member] October 2014 UM Senior Notes [Member] December 2014 UM Euro Senior Secured Notes [Member] December 2014 UM Euro Senior Secured Notes [Member] December 2014 UM Euro Senior Secured Notes [Member] December 2014 UM Dollar Senior Secured Notes [Member] December 2014 UM Dollar Senior Secured Notes [Member] December 2014 UM Dollar Senior Secured Notes [Member] March 2015 UM Senior Notes [Member] March 2015 UM Senior Notes [Member] March 2015 UM Senior Notes [Member] March 2015 UM Senior Secured Notes [Member] March 2015 UM Senior Secured Notes [Member] March 2015 UM Senior Secured Notes [Member] UM Senior Secured Notes Redeemed [Member] UM Senior Secured Notes Redeemed [Member] UM Senior Secured Notes Redeemed [Member] 2015 UM Notes [Member] 2015 UM Notes [Member] 2015 UM Notes [Member] UM Senior Exchange Notes [Member] UM Senior Exchange Notes [Member] UM Senior Exchange Notes [Member] 2015 UM Senior Secured Notes [Member] 2015 UM Senior Secured Notes [Member] 2015 UM Senior Secured Notes [Member] 2015 UM Senior Notes [Member] 2015 UM Senior Notes [Member] 2015 UM Senior Notes [Member] Line of Credit [Member] Line of Credit [Member] Carrying value Long-term Line of Credit Portion of debt threshold default In excess of which trigger event of default for aggregate debt Portion Of Debt Threshold Default In Excess Of Which Trigger Event Of Default For Aggregate Debt The amount of indebtedness which is the threshold of minimum debt. If any greater amount is deemed in default, the total amount of the debt outstanding is considered in default. 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January 2020 318.9 EUR 8818.7 CZK [Member] January 2015 - January 2020 318.9 EUR 8818.7 CZK [Member] January 2017 60.0 EUR 1703.1 CZK [Member] January 2015 to January 2017 60.0 EUR 1703.1 CZK [Member] January 2015 to 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 - January 2017 260.0 EUR 75570.0 HUF [Member] January 2015 to January 2017 260.0 EUR 75570.0 HUF [Member] January 2015 to January 2017 260.0 EUR 75570.0 HUF [Member] December 2016 150Euro 43367.5Huf [Member] December 2016 150Euro 43367.5Huf [Member] December 2016 150Euro 43367.5Huf [Member] July 2018 78Euro 19500Huf [Member] July 2018 78Euro 19500Huf [Member] July 2018 78Euro 19500Huf [Member] January 2017 245.0 EUR 1000.6 PLN [Member] January 2015 - January 2017 245.0 EUR 1000.6 PLN [Member] January 2015 - 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Income Statement [Abstract] Revenue (note 14) Revenues 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 Depreciation, Depletion and Amortization, Nonproduction Impairment, restructuring and other operating items, net (note 11) Restructuring, Settlement and Impairment Provisions Operating costs and expenses, Total Costs and Expenses Operating income Operating Income (Loss) Non-operating income (expense): Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Realized and unrealized losses on derivative instruments, net (note 4) Gain (Loss) on Derivative Instruments, Net, Pretax Foreign currency transaction gains (losses), net Foreign Currency Transaction Gain (Loss), before Tax Realized and unrealized gains due to changes in fair values of certain investments, net (note 5) Realized And Unrealized Gains (Losses) Due To Changes In Fair Values of Certain Investments, Net Realized And Unrealized Gains (Losses) Due To Changes In Fair Values of Certain Investments, Net Losses on debt modification and extinguishment, net (note 7) Gains (Losses) on Restructuring of Debt Other income (expense), net Other Nonoperating Income (Expense) Non-operating income (expense), Total Nonoperating Income (Expense) Loss from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax benefit (expense) (note 8) Income Tax Expense (Benefit) Loss from continuing operations Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Discontinued operation (note 1): Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax [Abstract] Earnings from discontinued operation, net of taxes Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Gain (adjustment to gain) on disposal of discontinued operation, net of taxes Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Income (loss) on discontinued operation, Total Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Net loss Net earnings attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net loss attributable to Liberty Global shareholders Net Income (Loss) Attributable to Parent Basic and diluted loss attributable to Liberty Global shareholders per share (note 12): Earnings Per Share, Basic and Diluted [Abstract] Continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic and Diluted Share Discontinued operation (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share Basic and diluted earnings (loss) attributable to Liberty Global shareholders per share (in dollars per share) Earnings Per Share, Basic and Diluted Weighted average ordinary shares outstanding – basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Loss Contingencies [Table] Loss Contingencies [Table] 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 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] FCO Regulatory Issues [Member] FCO Regulatory Issues [Member] FCO Regulatory Issues [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] Mobistar MVNO Agreement [Member] Mobistar MVNO Agreement [Member] Mobistar MVNO Agreement [Member] Other Regulatory Issues [Member] Other Regulatory Issues [Member] Other Regulatory Issues [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [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 Reduction of annual lease fees Reduction of Annual Lease Fees Reduction of Annual Lease Fees Subsidiary interest in recovery Subsidiary Interest in Recovery Subsidiary Interest in Recovery Damages awarded Loss Contingency, Damages Awarded, Value 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 Number of Competitors of German Cable Business Number of Competitors of German Cable Business Number of Competitors of German Cable Business Loss in period Loss Contingency, Loss in Period Number of Participating Countries in Financial Transaction Tax Number of Participating Countries in Financial Transaction Tax Number of Participating Countries in Financial Transaction Tax Financial Transactions Tax Financial Transactions Tax Financial Transactions Tax Minimum range of possible loss Loss Contingency, Range of Possible Loss, Minimum Decrease in revenues Loss Contingency, Decrease in Revenues Loss Contingency, Decrease in Revenues Maximum possible loss Loss Contingency, Range of Possible Loss, Maximum Loss contingency accrual Loss Contingency Accrual Commitment term Commitment Term Commitment Term 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 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 Tax effect of intercompany financing Income Tax Reconciliation, Tax Effect of Intercompany Financing Income Tax Reconciliation, Tax Effect of Intercompany Financing 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] 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 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 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 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 Recognition of previously unrecognized tax benefits Income Tax Reconciliation, Previously Unrecognized Tax Benefits Income Tax Reconciliation, Previously Unrecognized Tax Benefits Tax benefit associated with technology innovation Effective Income Tax Rate Reconciliation, Deduction, Amount Other, net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Total income tax benefit (expense) Segment Reporting, Measurement Disclosures [Abstract] Principal Transaction Revenue [Table] Principal Transaction Revenue [Table] 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] 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] Mobile Interconnect [Member] Mobile Interconnect [Member] Mobile Interconnect [Member] SOHO Cable Subscription [Member] SOHO Cable Subscription [Member] SOHO Cable Subscription [Member] Total Total segment Adjusted OIBDA from continuing operations Segment Operating Cash Flow Segment Operating Cash Flow Share-based compensation Share-based Compensation Depreciation and amortization Impairment, restructuring and other operating items, net Realized and unrealized losses on derivative instruments, net Foreign currency transaction gains (losses), net Realized and unrealized gains due to changes in fair values of certain investments, net Losses on debt modification and extinguishment, net Loss from continuing operations before income taxes Income (loss) from continuing operations before income taxes Sum of operating profit and nonoperating income (expense) before income taxes. Statement of Financial Position [Abstract] Investments, fair value Investments, Fair Value Disclosure Common stock, nominal value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, issued (in shares) Common Stock, Shares, Issued Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Intergroup Eliminations [Member] Intersegment Eliminations [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] Inter-group Eliminations [Member] Inter-group Eliminations [Member] Inter-group Eliminations [Member] Operating cash flow Earnings Per Share [Abstract] 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] Parent Company [Member] Parent Company [Member] 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] Amounts attributable to Liberty Global shareholders: Amounts Attributable to LGI Stockholders [Abstract] Amounts Attributable to LGI Stockholders [Abstract] Loss from continuing operations Income (Loss) from Continuing Operations Attributable to Parent Earnings (loss) from discontinued operation Ziggo USD Facility [Member] Ziggo USD Facility [Member] Ziggo USD Facility [Member] Ziggo Euro Facility [Member] Ziggo Euro Facility [Member] Ziggo Euro Facility [Member] Senior Secured Proceeds Loan [Member] Senior Secured Proceeds Loan [Member] Senior Secured Proceeds Loan [Member] Euro Senior Proceeds Loan [Member] Euro Senior Proceeds Loan [Member] Euro Senior Proceeds Loan [Member] Dollar Senior Proceeds Loan [Member] Dollar Senior Proceeds Loan [Member] Dollar Senior Proceeds Loan [Member] New Ziggo Credit Facility [Member] New Ziggo Credit Facility [Member] New Ziggo Credit Facility [Member] Ziggo Revolving Facilities [Member] Ziggo Revolving Facilities [Member] Ziggo Revolving Facilities [Member] Elimination of the Proceeds Loans in consolidation [Member] Elimination of the Proceeds Loans in consolidation [Member] Elimination of the Proceeds Loans in consolidation [Member] Ziggo Credit Facility [Member] Ziggo Credit Facility [Member] Ziggo Credit Facility [Member] Ziggo Revolving Facility One [Member] Ziggo Revolving Facility One [Member] Ziggo Revolving Facility One [Member] Ziggo Revolving Facility Two [Member] Ziggo Revolving Facility Two [Member] Ziggo Revolving Facility Two [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] EURIBOR [Member] EURIBOR [Member] EURIBOR [Member] Facility amount Line of Credit Facility, Maximum Borrowing Capacity Unused borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Unused borrowing capacity, compliance requirements met Debt Instrument, Unused Borrowing Capacity Amount, Compliance Requirements Completed Debt Instrument, Unused Borrowing Capacity Amount, Compliance Requirements Completed 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 Commitment increase (decrease) Line of Credit Facility, Increase (Decrease), Net Document and Entity Information [Abstract] Document And Entity Information [Abstract] Entities [Table] Entities [Table] 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 Debt and Capital Lease Obligations [Abstract] Debt and Capital Lease Obligations Debt Disclosure [Text Block] Stock Compensation Plan [Member] Stock Compensation Plan [Member] Total compensation expense not yet recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted average period remaining for expense recognition (in years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Restructuring and Related Activities [Abstract] Restructuring Liability Restructuring and Related Activities Disclosure [Text Block] Virgin Media [Member] Virgin Media [Member] Virgin Media [Member] Other Subsidiaries [Member] Other Subsidiaries [Member] Relating to Other Subsidiaries not otherwise identified. 2015 (remainder of year) Capital Leases, Future Minimum Payments, Remainder of Fiscal Year 2016 Capital Leases, Future Minimum Payments Due in Two Years 2017 Capital Leases, Future Minimum Payments Due in Three Years 2018 Capital Leases, Future Minimum Payments Due in Four Years 2019 Capital Leases, Future Minimum Payments Due in Five Years 2020 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 European Operations Division United Kingdom [Member] European Operations Division United Kingdom [Member] European Operations Division United Kingdom [Member] European Operations Division Switzerland [Member] European Operations Division Switzerland [Member] European Operations Division Switzerland [Member] European Operations Division Poland [Member] European Operations Division Poland [Member] European Operations Division Poland [Member] European Operations Division Ireland [Member] European Operations Division Ireland [Member] European Operations Division Ireland [Member] European Operations Division Austria [Member] European Operations Division Austria [Member] European Operations Division Austria [Member] European Operations Division Hungary [Member] European Operations Division Hungary [Member] European Operations Division Hungary [Member] European Operations Division Czech Republic [Member] European Operations Division Czech Republic [Member] European Operations Division Czech Republic [Member] European Operations Division Romania [Member] European Operations Division Romania [Member] European Operations Division Romania [Member] European Operations Division Slovakia [Member] European Operations Division Slovakia [Member] European Operations Division Slovakia [Member] European Operations Division Other Europe [Member] European Operations Division Other Europe [Member] European Operations Division Other Europe [Member] Other, Including Intersegment Eliminations Geography Eliminations [Member] Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation [Table] Basis of Presentation [Table] Basis of Presentation [Table] LiLAC Holdings [Member] LiLAC Holdings [Member] LiLAC Holdings [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Video, Broadband Internet and FIxed-Line Telephony [Member] Video, Broadband Internet and FIxed-Line Telephony [Member] Video, Broadband Internet and FIxed-Line Telephony [Member] Mobile Services [Member] Mobile Services [Member] Mobile Services [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Europe [Member] Europe [Member] Puerto Rico [Member] PUERTO RICO Common Class A [Member] Common Class A [Member] Common Class B [Member] Common Class B [Member] Common Class C [Member] Common Class C [Member] Basis of Presentation [Line Items] Basis of Presentation [Line Items] [Line Items] for Basis of Presentation [Table] Number of countries in which entity provides services (in countries) Number of Countries in which Entity Operates Percentage ownership in subsidiary Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions Dividend shares issued (in shares) Common Stock Dividends, Shares Number of parent company shares for every one distributed share Common Stock Dividends, Number of Parent Company Shares for Every One Distributed Share Common Stock Dividends, Number of Parent Company Shares for Every One Distributed Share Cash capital contribution Proceeds from Contributions from Parent Number of distributed shares for every 20 parent company shares Common Stock Dividends, Number of Distributed Shares for Every Twenty Parent Company Shares Common Stock Dividends, Number of Distributed Shares for Every Twenty Parent Company Shares Counterparty Credit Risk [Member] Counterparty Credit Risk [Member] Counterparty Credit Risk [Member] VM Convertible Senior Notes [Member] VM Convertible Senior Notes [Member] VM Convertible Senior Notes [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. 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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 Schedule of revenue by geographic segments Text Block Schedule of revenue by geographic segments Operating activities Payments for (Proceeds from) Derivative Instrument, Operating Activities Payments for (Proceeds from) Derivative Instrument, Operating Activities Payments for (Proceeds from) Derivative Instrument, Investing Activities Payments for (Proceeds from) Derivative Instrument, Investing Activities Financing activities Payments for (Proceeds from) Derivative Instrument, Financing Activities Total Payments For Proceeds From Derivatives Continuing Operations Payments For Proceeds From Derivatives Continuing Operations Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Other Share-Based Incentive Awards [Member] Other Share-Based Incentive Awards [Member] Other Share-Based Incentive Awards [Member] Other Stock Plan [Member] Other Stock Plan [Member] Other Stock Plan [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Operating expense Operating Expense [Member] SG&A expense Selling, General and Administrative Expenses [Member] Stock-based compensation expense Allocated Share-based Compensation Expense Statement of Comprehensive Income [Abstract] Net loss 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 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 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 Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Schedule of Capitalization, Equity [Table] Schedule of Capitalization, Equity [Table] LGI Convertible Notes Debt [Member] LGI Convertible Notes Debt [Member] LGI Convertible Notes Debt [Member] Schedule of Capitalization, Equity [Line Items] Schedule of Capitalization, Equity [Line Items] Shares purchased pursuant to repurchase programs (in shares) Stock Repurchased During Period, Shares Average price paid per share pursuant to repurchase programs (in dollars per share) Treasury Stock Acquired, Average Cost Per Share Total cost for stock purchased pursuant to repurchase programs Treasury Stock, Value, Acquired, Cost Method Remaining amount authorized under the stock repurchase program Treasury stock repurchase remaining amount authorized Treasury stock repurchase remaining amount authorized. 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] Switzerland / Austria [Member] Switzerland / Austria [Member] Switzerland / Austria [Member] Netherlands [Member] NETHERLANDS 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, 2015 Restructuring Reserve Restructuring charges (credits) Restructuring Charges Cash paid Payments for Restructuring Foreign currency translation adjustments and other Restructuring Reserve, Translation Adjustment Restructuring liability as of June 30, 2015 Current portion Restructuring Reserve, Current Noncurrent portion Restructuring Reserve, Noncurrent Total Unrecorded Purchase Obligation Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Class A Old Liberty Global Ordinary Shares [Member] Class A Old Liberty Global Ordinary Shares [Member] Class A Old Liberty Global Ordinary Shares [Member] Class C Old Liberty Global Ordinary Shares [Member] Class C Old Liberty Global Ordinary Shares [Member] Class C Old Liberty Global Ordinary Shares [Member] VM Credit Facility [Member] VM Credit Facility [Member] VM Credit Facility [Member] VM Convertible Notes [Member] VM Convertible Notes [Member] VM Convertible Notes [Member] VM Convertible Notes Indenture [Member] VM Convertible Notes Indenture [Member] VM Convertible Notes Indenture [Member] Ziggo SPE Notes [Member] Ziggo SPE Notes [Member] Ziggo SPE Notes [Member] Ziggo Notes [Member] Ziggo Notes [Member] Ziggo 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] Telenet SPE Notes [Member] Telenet SPE Notes [Member] Telenet SPE Notes [Member] Telenet Credit Facility [Member] Telenet Credit Facility [Member] Telenet Credit Facility [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] 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] 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] UM Senior Secured Facility [Member] UM Senior Secured Facility [Member] UM Senior Secured Facility [Member] UM Super Senior Secured Revolving Facility [Member] UM Super Senior Secured Revolving Facility [Member] UM Super Senior Secured Revolving Facility [Member] Unitymedia Capital Lease Obligations [Member] Unitymedia Capital Lease Obligations [Member] Unitymedia Capital Lease Obligations [Member] Telenet Capital Lease [Member] Telenet Capital Lease [Member] Telenet Capital Lease [Member] Virgin Media Capital Lease Obligations [Member] Virgin Media Capital Lease Obligations [Member] Virgin Media Capital Lease Obligations [Member] Other Subsidiaries Capital Lease [Member] Other Subsidiaries Capital Lease [Member] Other Subsidiaries Capital Lease [Member] Liberty Puerto Rico Capital Lease Obligations [Member] Liberty Puerto Rico Capital Lease Obligations [Member] Liberty Puerto Rico Capital Lease Obligations [Member] VTR Capital Lease Obligations [Member] VTR Capital Lease Obligations [Member] VTR Capital Lease Obligations [Member] Ziggo [Member] Ziggo [Member] Ziggo [Member] Currency [Axis] Currency [Axis] All Currencies [Domain] All Currencies [Domain] United States of America, Dollars United States of America, Dollars Chile, Pesos Chile, Pesos Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Choice Acquisition [Member] Choice Acquisition [Member] Choice Acquisition [Member] Debt: Debt Instruments [Abstract] Weighted average interest rate Debt, Weighted Average Interest Rate Unused borrowing capacity Debt Instrument, Unused Borrowing Capacity, Amount Capital lease obligations: Capital Lease Obligations [Abstract] Total capital lease obligations Capital Lease Obligations Maximum amount available to be loaned or distributed Debt Instrument, Maximum Amount Available to Be Loaned or Distributed Debt Instrument, Maximum Amount Available to Be Loaned or Distributed Maximum amount available to be loaned or distributed, compliance requirements met Debt Instrument, Maximum Amount Available to Be Loaned or Distributed, Compliance Requirements Met Debt Instrument, Maximum Amount Available to Be Loaned or Distributed, Compliance Requirements Met 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 Instrument, Convertible, Number of Equity Instruments Debt Instrument, Convertible, Shares Portion of Settlement Debt Instrument, Convertible, Shares Portion of Settlement Debt Instrument, Convertible, Cash Portion of Settlement Debt Instrument, Convertible, Cash Portion of Settlement Debt Instrument, Convertible, Cash Portion of Settlement Debt Instrument, Convertible, Principal Amount Debt Instrument, Convertible, Principal Amount Debt Instrument, Convertible, Principal Amount 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] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Employee Stock Option [Member] Employee Stock Option [Member] Stock Appreciation Rights (SARs) [Member] Stock Appreciation Rights (SARs) [Member] Performance Stock Appreciation Rights (PSARs) [Member] Performance Stock Appreciation Rights (PSARs) [Member] Performance Stock Appreciation Rights (PSARs) [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] 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] Stock compensation assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [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] Schedule of Consolidated Debt and Capital Lease Obligations Schedule of Consolidated Debt and Capital Lease Obligations [Text Block] Schedule Of Consolidated Debt And Capital Lease Obligations Schedule of Debt Schedule of Debt [Table Text Block] Schedule of Line of Credit Facilities Schedule of Line of Credit Facilities [Table Text Block] Schedule of Maturities of Long-Term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Capital Lease Obligations Schedule of Maturities of Capital Lease Obligations [Table Text Block] Tabular disclosure of the combined aggregate amount of due dates for all capital lease obligations for each of the five years following the date of the latest balance sheet date presented. Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Line Items] Business Acquisition [Line Items] 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 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 Other accrued and current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other 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 Ziggo Group Holding [Member] Ziggo Group Holding [Member] Ziggo Group Holding [Member] UPC Holding [Member] UPC Holding [Member] UPC Holding [Member] 2015 (remainder of year) Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2016 Long-term Debt, Maturities, Repayments of Principal in Year Two 2017 Long-term Debt, Maturities, Repayments of Principal in Year Three 2018 Long-term Debt, Maturities, Repayments of Principal in Year Four 2019 Long-term Debt, Maturities, Repayments of Principal in Year Five 2020 Long Term Debt Maturities Repayments of Principal in Year Six Amount of long-term debt maturing in 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. 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. Total debt maturities Unamortized premium (discount) Debt Instrument, Unamortized Discount (Premium), Net Total debt Current portion (d) Long-term Debt, Current Maturities Noncurrent portion Long-term Debt, Excluding Current Maturities 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 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 Interest Rate Cap [Member] Interest Rate Cap [Member] Interest Rate Collar [Member] Interest Rate Collar [Member] Interest Rate Collar 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] 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] ITV Collar [Member] ITV Collar [Member] ITV Collar [Member] Sumitomo Collar [Member] Sumitomo Collar [Member] Relating to the Sumitomo Collar Ziggo Collar [Member] Ziggo Collar [Member] Ziggo Collar [Member] Other [Member] Other Equity Related Derivative Instrument [Member] Other Equity Related Derivative Instrument [Member] Foreign Exchange Contract [Member] Foreign Exchange Contract [Member] Equity Contract [Member] Equity Contract [Member] Other Other Contract [Member] Gain (loss) on derivative instruments, net Derivative, Gain (Loss) on Derivative, Net Ziggo and Choice Acquisition [Member] Ziggo and Choice Acquisition [Member] Ziggo and Choice Acquisition [Member] 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] January 2020 1,135.0 EUR [Member] January 2015 — January 2020 1135.0 EUR [Member] January 2015 — January 2020 1135.0 EUR [Member] July 2017 650.0 EUR [Member] July 2017 650.0 EUR [Member] July 2017 650.0 EUR [Member] Minimum rate Derivative, Floor Interest Rate Maximum rate Derivative, Cap Interest Rate Acquisitions Business Combination Disclosure [Text Block] 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] Customer Relationships and Franchise Marketing Rights [Member] Customer Relationships and Franchise Marketing Rights [Member] Customer Relationships and Franchise Marketing Rights [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Estimated volatilities Estimated Volatilities Estimated Volatilities Discount rate Fair Value Inputs, Discount Rate Income Tax Benefit (Expense) Reconciliation Table Income Tax Benefit Expense Reconciliation Table Text Block Income tax benefit expense Reconciliation table. Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Earnings from discontinued operation Loss from continuing operations Adjustments to reconcile loss from continuing operations 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 Financing Costs and Discounts Realized and unrealized losses on derivative instruments, net Foreign currency transaction losses, net Realized and unrealized gains due to changes in fair values of certain investments, including impact of dividends Realized and unrealized gains (losses) due to changes in fair values of certain investments and debt, net of dividends Realized and unrealized losses (gains) due to changes in fair values of certain investments and debt, net 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 used by operating activities of discontinued operation Cash Provided by (Used in) Operating Activities, Discontinued Operations 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] Capital expenditures Payments to Acquire Productive Assets Cash paid in connection with acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Investments in and loans to affiliates and others Payments to Acquire Interest in Subsidiaries and Affiliates Proceeds received upon disposition of discontinued operation, net of disposal costs Proceeds from Divestiture of Businesses, Net of Cash Divested Other investing activities, net Payments for (Proceeds from) Other Investing Activities Net cash used by investing activities of discontinued operation Cash Provided by (Used in) Investing Activities, Discontinued Operations 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 Old Liberty Global Ordinary Shares Payments for Repurchase of Common Stock 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 Purchase of additional shares of subsidiaries Payments to Acquire Additional Interest in Subsidiaries Net cash paid associated with call option contracts on Old Liberty Global Ordinary Shares Net Cash Proceeds (Payments) associated with call Option Contracts Net Cash Proceeds (Payments) associated with call Option Contracts Other financing activities, net Proceeds from (Payments for) Other Financing Activities Net cash used by financing activities of discontinued operation Cash Provided by (Used in) Financing Activities, Discontinued Operations Net cash used by financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash – continuing operations Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Net decrease in cash and cash equivalents: Cash and Cash Equivalents, Period Increase (Decrease) [Abstract] Continuing operations Net Cash Provided by (Used in) Continuing Operations Discontinued operation Net Cash Provided by (Used in) Discontinued Operations Net 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 Cash and Cash Equivalents, at Carrying Value before Discontinued Operations Cash and Cash Equivalents, at Carrying Value before Discontinued Operations End of period Cash paid for interest – continuing operations Interest Paid, Continuing Operations Interest Paid, Continuing Operations Net cash paid for taxes: Income Taxes Paid, Net [Abstract] Net cash paid for taxes: Income Taxes Paid, Continuing Operations Income Taxes Paid, Continuing Operations Discontinued operation Income Taxes Paid, Discontinued Operations Income Taxes Paid, Discontinued Operations Total Income Taxes Paid, Net Details of Net Earnings (Loss) Attributable to LGI Stockholders Schedule Of Net Income Loss Attributable To Parent (Table Text Block) Schedule Of Net Income Loss Attributable To Parent (Table Text Block) Fair Value Measurements Fair Value Disclosures [Text Block] January 2020 735.0 EUR 7.00 Percent [Member] January 2020 735.0 EUR 7.00 Percent [Member] January 2020 735.0 EUR 7.00 Percent [Member] June 2017 50.0 EUR 4.5 Percent [Member] June 2017 50.0 EUR 4.5 Percent [Member] June 2017 50.0 EUR 4.5 Percent [Member] December 2017 0.5 EUR 6.50 Percent [Member] December 2017 0.5 EUR 6.50 Percent [Member] December 2017 0.6 EUR 6.50 Percent [Member] December 2017 0.5 EUR 5.50 Percent [Member] December 2017 0.5 EUR 5.50 Percent [Member] December 2017 0.6 EUR 5.50 Percent [Member] January 2020 735.0 EUR 7.00 Percent [Member] January 2015 to January 2020 735.0 EUR 7.00 Percent [Member] January 2015 to January 2020 735.0 EUR 7.00 Percent [Member] Interest Rate Cap Sold [Member] Interest Rate Cap Sold [Member] Interest Rate Cap Sold [Member] Telenet NV [Member] Telenet NV [Member] Telenet NV [Member] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Activities [Axis] Operating Activities [Axis] Operating Activities [Domain] Operating Activities [Domain] Continuing Operations [Member] Continuing Operations [Member] Discontinued Operations [Member] Discontinued Operations [Member] Revenue Business Acquisition, Pro Forma Revenue Revenue Disposal Group, Including Discontinued Operation, Revenue Liberty Global Group Business Acquisition, Pro Forma Net Income (Loss) Basic and diluted loss attributable to Liberty Global shareholders per share: Business Acquisition, Pro Forma Earnings Per Share, Basic and Diluted Business Acquisition, Pro Forma Earnings Per Share, Basic and Diluted Other Western Europe [Member] Other Western Europe [Member] Other Western Europe [Member] Telenet and Liberty Puerto Rico [Member] Telenet and Liberty Puerto Rico [Member] Telenet and Liberty Puerto Rico [Member] Number of reportable segments Number of Reportable Segments 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 Income Taxes Income Tax Disclosure [Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] 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 Summary of changes in restructuring liability Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Telenet Credit Facility M [Member] Telenet Credit Facility M [Member] Telenet Credit Facility M [Member] Telenet Credit Facility O [Member] Telenet Credit Facility O [Member] Telenet Credit Facility O [Member] Telenet Credit Facility P [Member] Telenet Credit Facility P [Member] Telenet Credit Facility P [Member] Telenet Credit Facility S [Member] Telenet Credit Facility S [Member] Telenet Credit Facility S [Member] Telenet Credit Facility U [Member] Telenet Credit Facility U [Member] Telenet Credit Facility U [Member] Telenet Credit Facility V [Member] Telenet Credit Facility V [Member] Telenet Credit Facility V [Member] Telenet Credit Facility W [Member] Telenet Credit Facility W [Member] Telenet Credit Facility W [Member] Telenet Credit Facility X [Member] Telenet Credit Facility X [Member] Telenet Credit Facility X [Member] Telenet Credit Facility X2 [Member] Telenet Credit Facility X2 [Member] Telenet Credit Facility X2 [Member] Telenet Credit Facility Y [Member] Telenet Credit Facility Y [Member] Telenet Credit Facility Y [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] Elimination of Telenet Facilities M, O, P, U and V in Consolidation [Member] Elimination of Telenet Facilities M, O, P, U and V in Consolidation [Member] Elimination of Telenet Facilities M, O, P, U and V in Consolidation [Member] Segment Reporting Segment Reporting Disclosure [Text Block] 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] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Type [Axis] Asset Class [Axis] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Asset Types [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, 2015 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. Losses included in net loss (a): Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings [Abstract] Realized and unrealized losses 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 losses due to changes in fair values of certain investments, 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 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, 2015 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] PSUs and PGUs [Member] PSUs and PGUs [Member] PSUs and PGUs [Member] Convertible Debt Securities and Other Obligations [Member] Convertible Debt Securities and Other Obligations [Member] Convertible Debt Securities and Other Obligations [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 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 Property, Plant and Equipment, Net Base Company NV [Member] Base Company NV [Member] Base Company NV [Member] Ziggo Acquisition [Member] Ziggo Acquisition [Member] Ziggo Acquisition [Member] Ziggo NCI Acquisition [Member] Ziggo NCI Acquisition [Member] Ziggo NCI Acquisition [Member] Ziggo Statutory Squeeze-Out [Member] Ziggo Statutory Squeeze-Out [Member] Ziggo Statutory Squeeze-Out [Member] Ziggo Merger Agreement [Member] Ziggo Merger Agreement [Member] Ziggo Merger Agreement [Member] Searchlight [Member] Searchlight [Member] Searchlight [Member] Film1 [Member] Film1 [Member] Film1 [Member] Expected consideration transfered Business Combination, Expected Consideration Transferred Business Combination, Expected Consideration Transferred Expected liabilities incurred Business Combination, Consideration Transferred, Expected Liabilities Incurred Business Combination, Consideration Transferred, Expected Liabilities Incurred Potential termination fee paid to seller Business Combination, Potential Termination Fee Paid to Seller Business Combination, Potential Termination Fee Paid to Seller Percentage of voting interests acquired Business Acquisition, Percentage of Voting Interests Acquired Ownership percentage by parent Noncontrolling Interest, Ownership Percentage by Parent Liabilities incurred Business Combination, Consideration Transferred, Liabilities Incurred Consideration transferred Business Combination, Consideration Transferred Weighted average useful life of intangible assets Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Direct acquisition costs Business Acquisition, Transaction Costs Equity interest acquired (in shares) Business Acquisition, Equity Interest Acquired, Shares Business Acquisition, Equity Interest Acquired, Shares Percentage of voting interests owned Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage Equity interest transferred in cash (in euro / dollars per share) Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Cash Per Share Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Cash Per Share Equity interest transferred in cash Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Number of channels in agreement Number of Channels in Agreement Number of Channels in Agreement Equity-related derivative instruments Foreign currency forward contracts Quoted prices in active markets for identical assets (Level 1) Fair Value, Inputs, Level 1 [Member] Significant other observable inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Derivative instruments Total assets Assets, Fair Value Disclosure Derivative instruments Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure VM Credit Facility D [Member] VM Credit Facility D [Member] VM Credit Facility D [Member] VM Credit Facility E [Member] VM Credit Facility E [Member] VM Credit Facility E [Member] VM Credit Facility F [Member] VM Credit Facility F [Member] VM Credit Facility F [Member] VM Revolving Credit Facility [Member] VM Revolving Credit Facility [Member] VM Revolving Credit Facility [Member] VM Credit Facility D. E, and F [Member] VM Credit Facility D. E, and F [Member] VM Credit Facility D. E, and F [Member] Outstanding principal amount Payment of third party costs Payments of Debt Issuance Costs Subsequent Events Subsequent Events [Text Block] Refinancing transactions, aggregate borrowings and repayments of debt Non-Cash Borrowings and Repayments of Debt Non-Cash Borrowings and Repayments of Debt PSUs [Member] PGUs [Member] PGUs [Member] PGUs [Member] Assumptions used to estimate fair value of options, share appreciation rights (SARs) and PSARs granted: Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected life Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Weighted average grant-date fair value per share of awards granted: Weighted average grant-date fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant-date fair value, other than options (in dollars per share) Total intrinsic value of awards exercised (in millions): Total intrinsic value of awards exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Cash received from exercise of options Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Income tax benefit related to stock-based compensation expense Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Earnings or Loss per Ordinary Share Earnings Per Share [Text Block] Old Liberty Global Ordinary Shares - Class A, $0.01 nominal value. Issued and outstanding 252,505,774 and 251,167,686 shares, respectively Old Liberty Global Ordinary Shares - Class B, $0.01 nominal value. Issued and outstanding 10,472,517 and 10,139,184 shares, respectively Old Liberty Global Ordinary Shares - Class C, $0.01 nominal value. Issued and outstanding 614,457,550 and 630,353,372 shares, respectively 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 Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Prepaid expenses Prepaid Expense, Current Derivative instruments (note 4) Other current assets Other Assets, Current Total current assets Assets, Current Investments (including $1,928.8 million and $1,662.7 million, respectively, measured at fair value) Long-term Investments Property and equipment, net (note 6) 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 (note 7) Debt, Current Accrued interest Interest Payable, Current Accrued capital expenditures Accrued Capital Expenditures, Current Accrued Capital Expenditures, Current Derivative instruments (note 4) Other accrued and current liabilities (note 11) Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Long-term debt and capital lease obligations (note 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, 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 Percent of PSUs granted are earned Percent of Performance Shares Granted Are Earned Percent of Performance Shares Granted Are Earned Reversal of share-based compensation expense