Debt and Capital Lease Obligations [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] VM Notes [Member] VM Notes [Member] VM Notes [Member] VM Credit Facility [Member] VM Credit Facility [Member] VM Credit Facility [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 Holding Senior Notes [Member] UPC Holding Senior Notes Debt [Member] UPC Holding Senior Notes Debt [Member] UPC Holding Bank Facility Debt [Member] UPC Holding Bank Facility Debt [Member] UPC Holding Bank Facility 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] Vendor Financing [Member] Vendor Financing [Member] Vendor Financing [Member] ITV Collar Loan [Member] ITV Collar Loan [Member] ITV Collar Loan [Member] Derivative Related Debt Instruments [Member] Derivative Related Debt Instruments [Member] Derivative Related Debt Instruments [Member] Sumitomo Share Loan [Member] Sumitomo Share Loan [Member] Sumitomo Share Loan [Member] Sumitomo Collar Loan [Member] Sumitomo Collar Loan Debt [Member] Sumitomo Collar Loan Debt [Member] Other Debt [Member] Other Debt [Member] Other Debt [Member] CWC Notes [Member] CWC Notes [Member] CWC Notes [Member] CWC Credit Facilities [Member] CWC Credit Facilities [Member] CWC Credit Facilities [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] Liberty Puerto Rico Bank Facility [Member] Liberty Puerto Rico Bank Facility Debt [Member] Liberty Puerto Rico Bank Facility Debt [Member] Aggregate Variable and Fixed Rate Indebtedness [Member] Aggregate Variable and Fixed Rate Indebtedness [Member] Aggregate Variable And Fixed Rate Indebtedness [Member] CWC Revolving Credit Facility [Member] CWC Revolving Credit Facility [Member] CWC Revolving Credit Facility [Member] VM Revolving Credit Facility [Member] VM Revolving Credit Facility [Member] VM Revolving Credit Facility [Member] Unitymedia Senior Secured Revolving Credit Facility [Member] Unitymedia Senior Secured Revolving Credit Facility [Member] Unitymedia Senior Secured Revolving Credit Facility [Member] Unitymedia Super Senior Secured Revolving Credit Facility [Member] Unitymedia Super Senior Secured Revolving Credit Facility [Member] Unitymedia Super Senior Secured Revolving Credit Facility [Member] UM Facility B [Member] UM Facility B [Member] UM Facility B [Member] Telenet Facility Z [Member] Telenet Facility Z [Member] Telenet Facility Z [Member] Telenet Facility AG [Member] Telenet Facility AG [Member] Telenet Facility AG [Member] VTR Dollar Credit Facility [Member] VTR Dollar Credit Facility [Member] VTR Dollar Credit Facility [Member] VTR CLP Credit Facility [Member] VTR CLP Credit Facility [Member] VTR CLP Credit Facility [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Liberty Global Group [Member] Liberty Global Group [Member] Liberty Global Group [Member] LiLAC Group [Member] LiLAC Group [Member] LiLAC Group [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Pro Forma [Member] Pro Forma [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Significant other observable inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Unitymedia [Member] Unitymedia [Member] Unitymedia [Member] Virgin Media [Member] Virgin Media [Member] Virgin Media [Member] UnityMedia KabelBW [Member] UnityMedia KabelBW [Member] UnityMedia KabelBW [Member] Telenet [Member] Telenet [Member] Telenet [Member] Other Subsidiaries [Member] Other Subsidiaries [Member] Relating to Other Subsidiaries not otherwise identified. CWC [Member] CWC [Member] CWC [Member] VTR [Member] VTR [Member] VTR [Member] Liberty Puerto Rico [Member] Liberty Puerto Rico [Member] Liberty Puerto Rico [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Weighted average interest rate Debt, Weighted Average Interest Rate Unused borrowing capacity Debt Instrument, Unused Borrowing Capacity, Amount Estimated fair value Debt Instrument, Fair Value Disclosure Total debt before premiums, discounts, fair value adjustments and deferred financing costs Long-term Debt, Gross Premiums, discounts, fair value adjustments and deferred financing costs, net Debt Instrument, Unamortized Discount (Premium), Net Total carrying amount of debt Long-term 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 Long-term Debt and Capital Lease Obligations Limitation on availability Line of Credit Facility, Current Borrowing Capacity Facility amount Line of Credit Facility, Maximum Borrowing Capacity Principal amount of debt Debt Instrument, Face Amount 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 borrowing groups Number of Borrowing Groups Number of Borrowing Groups 2017 (remainder of year) Capital Leases, Future Minimum Payments, Remainder of Fiscal Year 2018 Capital Leases, Future Minimum Payments Due in Two Years 2019 Capital Leases, Future Minimum Payments Due in Three Years 2020 Capital Leases, Future Minimum Payments Due in Four Years 2021 Capital Leases, Future Minimum Payments Due in Five Years 2022 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 Restructuring and Related Activities [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Latin America and the Caribbean (CWC) [Member] Latin America and the Caribbean [Member] Latin America and the Caribbean [Member] Germany GERMANY European Operations Division U.K / Ireland [Member] European Operations Division U.K / Ireland [Member] European Operations Division U.K / Ireland [Member] European Operations Division Central and Other [Member] European Operations Division Central and Other [Member] European Operations Division Central and Other [Member] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Employee severance and termination costs [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, 2017 Restructuring Reserve Restructuring charges Restructuring Charges Cash paid Payments for Restructuring Foreign currency translation adjustments and other Restructuring Reserve, Foreign Currency Translation Gain (Loss) Restructuring liability as of June 30, 2017 Current portion Restructuring Reserve, Current Noncurrent portion Restructuring Reserve, Noncurrent Total Investments [Abstract] Investments Investment Holdings [Text Block] Long lived Assets Long Lived Assets [Abstract] 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] Statement [Line Items] Statement [Line Items] Gross carrying amount Finite-Lived Intangible Assets, Gross Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Net carrying amount Finite-Lived Intangible Assets, Net Business Combinations [Abstract] Acquisitions Business Combination Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Summary of stock-based compensation Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of stock option activity 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 Investments [Table] Schedule of Investments [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Vodafone [Member] Vodafone [Member] Vodafone [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] VodafoneZiggo JV Loan [Member] VodafoneZiggo JV Loan [Member] VodafoneZiggo JV Loan [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] VodafoneZiggo JV [Member] VodafoneZiggo JV [Member] VodafoneZiggo JV [Member] Sumitomo Sumitomo [Member] Sumitomo [Member] Lionsgate Lionsgate [Member] Lionsgate [Member] ITI Neovision ITI Neovision [Member] ITI Neovision [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Due from related party Receivable with Imputed Interest, Face Amount Receivable interest rate Receivable with Imputed Interest, Effective Yield (Interest Rate) Receivable in year one Receivable with Imputed Interest, Net Amount, Receivable in Year One Receivable with Imputed Interest, Net Amount, Receivable in Year One Receivable in year two Receivable with Imputed Interest, Net Amount, Receivable in Year Two Receivable with Imputed Interest, Net Amount, Receivable in Year Two Receivable in year three Receivable with Imputed Interest, Net Amount, Receivable in Year Three Receivable with Imputed Interest, Net Amount, Receivable in Year Three Accrued interests settled in cash Increase (Decrease) in Accrued Interest Receivable, Net Percent of share-based compensation included in investment Percent of Share-based Compensation Included in Income (Loss) from Equity Method Investments Percent of Share-based Compensation Included in Income (Loss) from Equity Method Investments Percent of remaining results of operations included in investment Percent of Remaining Results of Operations Included in Income (Loss) from Equity Method Investments Percent of Remaining Results of Operations Included in Income (Loss) from Equity Method Investments Percent of interest income earned on loan included in investment Percent of Interest Income Earned on Loan Included in Income (Loss) from Equity Method Investments Percent of Interest Income Earned on Loan Included in Income (Loss) from Equity Method Investments Ownership percentage Equity Method Investment, Ownership Percentage Co-venturer ownership percentage Equity Method Investment, Co-Venturer Ownership Percentage Equity Method Investment, Co-Venturer Ownership Percentage Distributions received from affiliates Proceeds from Equity Method Investment, Distribution Value-added taxes (VAT) paid on behalf of the VodafoneZiggo JV Payments of Value-Added Taxes, Joint Venture Payments of Value-Added Taxes, Joint Venture Distributions received from affiliates Proceeds from Equity Method Investment, Distribution, Return of Capital Proceeds from financing arrangements Proceeds from Joint Venture Debt Financing Arrangements Proceeds from Joint Venture Debt Financing Arrangements Proceeds from equalization payment from affiliate Proceeds from Equalization Payment from Affiliate Proceeds from Equalization Payment from Affiliate Continuing and required services term Equity Method Investment, Continuing and Required Services Term Equity Method Investment, Continuing and Required Services Term Transitional services term Equity Method Investment, Transitional Services Term Equity Method Investment, Transitional Services Term Revenues Revenues Related-party — VodafoneZiggo JV (note 4) Other Assets, Related Parties, Current Other Assets, Related Parties, Current Virgin Media Secured Finance [Member] Virgin Media Secured Finance [Member] Virgin Media Secured Finance [Member] April 2027 VM Senior Secured Notes [Member] April 2027 VM Senior Secured Notes [Member] April 2027 VM 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] VM Credit Facility J [Member] VM Credit Facility J [Member] VM Credit Facility J [Member] VM Credit Facility E [Member] VM Credit Facility E [Member] VM Credit Facility E [Member] January 2021 VM Sterling Senior Secured Notes [Member] January 2021 VM Sterling Senior Secured Notes [Member] January 2021 VM Sterling Senior Secured Notes [Member] 2025 VM Variable Sterling Senior Secured Notes [Member] 2025 VM Variable Sterling Senior Secured Notes [Member] 2025 VM Variable Sterling Senior Secured Notes [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Senior Notes [Member] Senior Notes [Member] Medium-term Notes [Member] Medium-term Notes [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] 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 One [Member] 2022 Debt Instrument, Redemption, Period Two [Member] 2023 Debt Instrument, Redemption, Period Three [Member] 2024 Debt Instrument, Redemption, Period Four [Member] 2025 and thereafter Debt Instrument, Redemption, Period Five [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Scenario, Forecast [Member] Scenario, Forecast [Member] Principal amount of debt Interest rate Debt Instrument, Interest Rate, Stated Percentage Extinguishment of debt Extinguishment of Debt, Amount Loss on debt modification and extinguishment Gain (Loss) on Extinguishment of Debt Payments for debt redemption premium Payments For Debt Redemption Premium Payments For Debt Redemption Premium Write-off of deferred financing costs Write off of Deferred Debt Issuance Cost Additional basis points used to determine redemption premium Debt Instrument, Additional Basis Points on Discount Rate Used to Calculate Redemption Premium Additional basis points on discount rate used to calculate redemption premium on debt instrument. Redemption price Debt Instrument, Redemption Price, Percentage Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Floor rate Debt Instrument, Floor Interest Rate Debt Instrument, Floor Interest Rate Write-off of unamortized debt discount (premium) Write-off of Unamortized Debt Discount (Premium) Write-off of Unamortized Debt Discount (Premium) Earnings Per Share [Abstract] 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] Options, SARs, PSARs and RSUs [Member] Options, SARs, PSARs and RSUs [Member] Options, SARs, PSARs and RSUs [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] VM Convertible Notes [Member] Convertible Debt Securities [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 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] Schedule of Goodwill [Table] Schedule of Goodwill [Table] European Operations Division Belgium [Member] European Operations Division Belgium [Member] European Operations Division Belgium [Member] European Operations Division Germany [Member] European Operations Division Germany [Member] European Operations Division Germany [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] Total European Operations Division [Member] Total European Operations Division [Member] Total European Operations Division [Member] Corporate and Other [Member] Corporate and Other [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] Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill beginning balance Goodwill Acquisitions and related adjustments Goodwill, Purchase Accounting Adjustments Foreign currency translation adjustments and other Goodwill, Translation and Purchase Accounting Adjustments Goodwill ending balance 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] Options, SARs and PSARs [Member] Options, SARs and PSARs [Member] Options, SARs and PSARs [Member] Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] 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] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Options outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options outstanding, weighted average exercise or base price (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options exercisable, weighted average exercise price or base price (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Other than options outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 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 Property, Plant and Equipment, Net Derivative Instruments and Hedging Activities Disclosure [Abstract] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Cross-Currency and Interest Rate Derivative Contracts [Member] Cross Currency Interest Rate Contract [Member] Equity-Related Derivative Instruments [Member] Equity Contract [Member] Foreign Exchange Contract [Member] Foreign Exchange Contract [Member] Other Contract [Member] Other Contract [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 Derivative Asset Liabilities: Derivative Liability [Abstract] Current Derivative Liability, Current Long-term Derivative Liability, Noncurrent Total Derivative Liability Schedule of Debt Schedule of Debt [Table Text Block] Schedule of Senior Notes Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Borrowings Levels Schedule of Borrowings Levels [Table Text Block] Schedule of Borrowings Levels [Table Text Block] Schedule of Capital Lease Obligations Schedule of Capital Lease Obligations [Table Text Block] Schedule of Capital Lease Obligations [Table Text Block] Debt Instrument Redemption Debt Instrument Redemption [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 Maturities 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. Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] SFR BeLux [Member] SFR BeLux [Member] SFR BeLux [Member] BASE [Member] BASE [Member] BASE [Member] 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, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles 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 Total purchase price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Common Class B [Member] Common Class B [Member] 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 Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] 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 Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net earnings (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 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 Share-based Compensation Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Impairment, restructuring and other operating items, net Restructuring, Settlement and Impairment Provisions Amortization of deferred financing costs and non-cash interest Amortization of Debt Issuance Costs and Discounts Realized and unrealized losses (gains) on derivative instruments, net Gain (Loss) on Derivative Instruments, Net, Pretax Foreign currency transaction gains, net Foreign Currency Transaction Gain (Loss), before Tax Realized and unrealized losses due to changes in fair values of certain investments and debt Realized and Unrealized Losses (Gains) due to Changes in Fair Values of Certain Investments and Debt Realized and Unrealized Losses (Gains) due to Changes in Fair Values of Certain Investments and Debt Losses on debt modification and extinguishment, net Gains (Losses) on Restructuring of Debt Share of losses of affiliates, net Income (Loss) from Equity Method Investments Deferred income tax benefits Deferred Income Tax Expense (Benefit) 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] Equalization payment related to the VodafoneZiggo JV Transaction Proceeds from Collection of Advance to Affiliate 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 Other investing activities, net Payments for (Proceeds from) Other Investing Activities Net cash provided (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] Repayments and repurchases of debt and capital lease obligations Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Borrowings of debt Proceeds from Issuance of Long-term Debt Repurchase of Liberty Global ordinary shares Payments for Repurchase of Common Stock Change in cash collateral Change in Cash Collateral Change in cash collateral. Value-added taxes (VAT) paid on behalf of the VodafoneZiggo JV 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 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 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 End of period Cash paid for interest Interest Paid Net cash paid for taxes Income Taxes Paid Debt and Capital Lease Obligations Debt Disclosure [Text Block] CWC and BASE Acquisitions [Member] CWC and BASE Acquisitions [Member] CWC and BASE Acquisitions [Member] Revenue Business Acquisition, Pro Forma Revenue Net earnings (loss) attributable to Liberty Global shareholders Business Acquisition, Pro Forma Net Income (Loss) Basic (in dollars per share) Business Acquisition, Pro Forma Earnings Per Share, Basic Diluted (in dollars per share) Business Acquisition, Pro Forma Earnings Per Share, Diluted Multimedia [Member] Multimedia [Member] Multimedia [Member] U.S. Carve-out Entities [Member] U.S. Carve-out Entities [Member] U.S. Carve-out Entities [Member] Consideration transferred Business Combination, Consideration Transferred Equity interest issued Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Special cash dividend Business Combination, Consideration Transferred, Other Borrowings to fund acquisition Business Combination, Consideration Transferred, Liabilities Incurred Weighted average useful life of intangible assets Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Direct acquisition costs Business Combination, Acquisition Related Costs Equity [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Line Items] Class of Stock [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at January 1, 2017, before effect of accounting change Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Repurchase and cancellation of Liberty Global ordinary shares (note 10) Stock Repurchased and Retired During Period, Value Shares issued upon exercise or vesting of share-based incentive awards Stock Issued During Period, Value, Share-based Compensation, Gross Balance at June 30, 2017 Shares repurchased (in shares) Stock Repurchased and Retired During Period, Shares Average price paid per share (in dollars per share) Treasury Stock Acquired, Average Cost Per Share Total cost Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Equity Stockholders' Equity Note Disclosure [Text Block] Derivative [Table] Derivative [Table] Foreign Currency Forwards and Option Contracts [Member] Foreign Exchange Forward [Member] Derivative [Line Items] Derivative [Line Items] Notional amount of derivative Derivative, Notional Amount Sumitomo Collar Loan [Member] Sumitomo Collar Loan [Member] Sumitomo Collar Loan [Member] Lionsgate Forward [Member] Lionsgate Forward [Member] Lionsgate Forward [Member] Counterparty Credit Risk [Member] Counterparty Credit Risk [Member] Counterparty Credit Risk [Member] Equity Contract [Member] 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 Derivative assets Carrying value Securities borrowed Securities Borrowed Refinancing transactions, aggregate borrowings and repayments of debt Non-Cash Borrowings and Repayments of Debt Non-Cash Borrowings and Repayments of Debt Restructuring Liability Restructuring and Related Activities Disclosure [Text Block] 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 Pension-related adjustments and other Other Comprehensive Income Defined Benefit Plans Adjustment And Derivatives Qualifying As Hedges Net Of Tax Period Increase Decrease Other Comprehensive Income Defined 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Included in Earnings [Table Text Block] Accrued Income Taxes [Abstract] Computed “expected” tax benefit (a) 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] Expense 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 Benefit 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] Expense 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 Benefit 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 items 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] Expense 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 Benefit 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 International rate differences: Effective Income Tax Rate Reconciliation, International Rate Differences, Amount [Abstract] Effective Income Tax Rate Reconciliation, International Rate Differences, Amount [Abstract] Benefit 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 Expense 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 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 Enacted tax law and rate change Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Recognition of previously unrecognized tax benefits Income Tax Reconciliation, Previously Unrecognized Tax Benefits Income Tax Reconciliation, Previously Unrecognized Tax Benefits Tax effect of intercompany financing Income Tax Reconciliation, Tax Effect of Intercompany Financing Income Tax Reconciliation, Tax Effect of Intercompany Financing Other, net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Total income tax expense Income Tax Expense (Benefit) ITV Collar [Member] ITV Collar [Member] ITV Collar [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] Gain (loss) on derivative instruments, net Derivative, Gain (Loss) on Derivative, Net 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 [Member] Investments [Member] Cross-Currency and Interest Rate Derivative Contracts [Member] Cross-Currency and Interest Rate Derivative Contracts [Member] Cross-Currency and Interest Rate Derivative Contracts [Member] Equity-Related Derivative Instruments [Member] Equity-Related Derivative Instruments [Member] Equity-Related Derivative Instruments [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 asset (liability) at January 1, 2017 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 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) losses, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Partial settlement of Sumitomo Collar Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Additions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Foreign currency translation adjustments, dividends and other, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Balance of net asset (liability) at June 30, 2017 Long-lived Assets Long Lived Assets Disclosure [Text Block] The entire disclosure for long-lived assets. Basis of Presentation [Table] Basis of Presentation [Table] Basis of Presentation [Table] Total European Operations Division Europe [Member] Latin America and the Caribbean [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] 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] Sub-Sea Networks [Member] Sub-Sea Networks [Member] Sub-Sea Networks [Member] Cable & Wireless Communications Limited (CWC) [Member] Cable & Wireless Communications Limited (CWC) [Member] Cable & Wireless Communications Limited (CWC) [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] Number of countries in which entity provides services Number of Countries in which Entity Operates Percentage ownership in subsidiary Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions Number of markets Number of Markets Number of Markets Segment Reporting, Measurement Disclosures [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments [Member] Operating Segments [Member] Geography Eliminations [Member] Geography Eliminations [Member] U.K. UNITED KINGDOM Belgium BELGIUM 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] The Netherlands NETHERLANDS 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 Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenue Equity Method Investment, Summarized Financial Information, Revenue 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] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Income Taxes Income Tax Disclosure [Text Block] Debt Disclosure [Abstract] UPC Holding [Member] UPC Holding [Member] UPC Holding [Member] UPC Broadband Holding [Member] UPC Broadband Holding [Member] UPC Broadband Holding [Member] UPCB Finance VII [Member] UPCB Finance VII [Member] UPCB Finance VII [Member] Telenet Facility AF [Member] Telenet Facility AF [Member] Telenet Facility AF [Member] UPC Facility AP [Member] UPC Facility AP [Member] UPC Facility AP [Member] UPC Facility AN [Member] UPC Facility AN [Member] UPC Facility AN [Member] UPCB Finance VII Notes [Member] UPCB Finance VII Notes [Member] UPCB Finance VII Notes [Member] UPC Facility AO [Member] UPC Facility AO [Member] UPC Facility AO [Member] UPC Holding 3.875% Senior Notes [Member] UPC Holding 3.875% Senior Notes [Member] UPC Holding 3.875% Senior Notes [Member] UPC Holding 6.375% Senior Notes [Member] UPC Holding 6.375% Senior Notes [Member] UPC Holding 6.375% Senior Notes [Member] Issued at par percentage Debt Instrument, Issuance Price Percentage Debt Instrument, Issuance Price Percentage Special purpose financing entity ownership by third party Special Purpose Financing Entity Ownership by Third Party Special Purpose Financing Entity Ownership by Third Party Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Quoted prices in active markets for identical assets (Level 1) Fair Value, Inputs, Level 1 [Member] 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] Weighted average discount rate Fair Value Inputs, Discount Rate Derivative instruments Total assets Assets, Fair Value Disclosure Derivative instruments Debt Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Due From Counterparty [Member] Due From Counterparty [Member] Due From Counterparty [Member] Due To Counterparty [Member] Due To Counterparty [Member] Due To Counterparty [Member] VTR Finance [Member] VTR Finance [Member] VTR Finance [Member] Cross-Currency Swap 1 [Member] Cross-Currency Swap 1 [Member] Cross-Currency Swap 1 [Member] Cross-Currency Swap 2 [Member] Cross-Currency Swap 2 [Member] Cross-Currency Swap 2 [Member] Cross-Currency Swap 3 [Member] Cross-Currency Swap 3 [Member] Cross-Currency Swap 3 [Member] Cross-Currency Swap 4 [Member] Cross-Currency Swap 4 [Member] Cross-Currency Swap 4 [Member] Cross-Currency Swap 5 [Member] Cross-Currency Swap 5 [Member] Cross-Currency Swap 5 [Member] Cross-Currency Swap 6 [Member] Cross-Currency Swap 6 [Member] Cross-Currency Swap 6 [Member] Cross-Currency Swap 7 [Member] Cross-Currency Swap 7 [Member] Cross-Currency Swap 7 [Member] Cross-Currency Swap 8 [Member] Cross-Currency Swap 8 [Member] Cross-Currency Swap 8 [Member] Cross-Currency Swap 9 [Member] Cross-Currency Swap 9 [Member] Cross-Currency Swap 9 [Member] Cross-Currency Swap 10 [Member] Cross-Currency Swap 10 [Member] Cross-Currency Swap 10 [Member] Cross-Currency Swap 11 [Member] Cross-Currency Swap 11 [Member] Cross-Currency Swap 11 [Member] Cross-Currency Swap 12 [Member] Cross-Currency Swap 12 [Member] Cross-Currency Swap 12 [Member] Cross-Currency Swap 13 [Member] Cross-Currency Swap 13 [Member] Cross-Currency Swap 13 [Member] Cross-Currency Swap 14 [Member] Cross-Currency Swap 14 [Member] Cross-Currency Swap 14 [Member] Cross-Currency Swap 15 [Member] Cross-Currency Swap 15 [Member] Cross-Currency Swap 15 [Member] Cross-Currency Swap 16 [Member] Cross-Currency Swap 16 [Member] Cross-Currency Swap 16 [Member] Cross-Currency Swap 17 [Member] Cross-Currency Swap 17 [Member] Cross-Currency Swap 17 [Member] Cross-Currency Swap 18 [Member] Cross-Currency Swap 18 [Member] Cross-Currency Swap 18 [Member] Weighted average remaining life Derivative, Average Remaining Maturity Notional amount of derivative instruments without exchange of notional amounts at inception and maturity Notional Amount of Derivative Instruments without Exchange of Notional Amounts at Inception and Maturity Notional Amount of Derivative Instruments without Exchange of Notional Amounts at Inception and Maturity 2017 (remainder of year) Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2018 Long-term Debt, Maturities, Repayments of Principal in Year Two 2019 Long-term Debt, Maturities, Repayments of Principal in Year Three 2020 Long-term Debt, Maturities, Repayments of Principal in Year Four 2021 Long-term Debt, Maturities, Repayments of Principal in Year Five 2022 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 Long-term Debt, Gross Contractual Maturities Long-term Debt, Gross Contractual Maturities Premiums, discounts, fair value adjustments and deferred financing costs, net Total debt Long-term Debt Contractual Maturities Long-term Debt Contractual Maturities Current portion Long-term Debt, Current Maturities Noncurrent portion Long-term Debt, Excluding Current Maturities Segment Reporting Segment Reporting Disclosure [Text Block] Basis Swap [Member] Basis Swap [Member] Interest Rate Cap [Member] Interest Rate Cap [Member] Interest Rate Collar [Member] Interest Rate Collar [Member] Interest Rate Collar ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Trade receivables, net Accounts Receivable, Net, Current Restricted cash (note 8) Restricted Cash, Current Derivative instruments (note 5) Prepaid expenses Prepaid Expense, Current Receivable from the VodafoneZiggo JV (note 4) Notes Receivable, Related Parties, Current Other current assets: Prepaid Expense and Other Assets, Current [Abstract] Third-party Other Assets, Current Total current assets Assets, Current Investments and related note receivables (including $2,070.2 million and $2,057.2 million, respectively, measured at fair value on a recurring basis) (note 4) Long-term Investments Property and equipment, net (note 7) Goodwill (note 7) Intangible assets subject to amortization, net (note 7) Other assets, net (note 5) 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 8) Debt, Current Accrued capital expenditures Accrued Capital Expenditures, Current Accrued Capital Expenditures, Current Accrued interest Interest Payable, Current Accrued income taxes Accrued Income Taxes, Current Other accrued and current liabilities (notes 5 and 12) Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Long-term debt and capital lease obligations (note 8) Other long-term liabilities (notes 5, 9, and 12) Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (notes 3, 5, 8, 9 and 14) Commitments and Contingencies Equity (note 10): 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 Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Performance-based incentive awards Performance-Based Incentive Awards [Member] Performance-Based Incentive Awards [Member] Other share-based incentive awards Other Share-Based Incentive Awards [Member] Other Share-Based Incentive Awards [Member] Telenet share-based incentive awards Telenet Share-Based Incentive Awards [Member] Telenet Share-Based Incentive Awards [Member] Other Other Stock Plan [Member] Other Stock Plan [Member] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Parent Company [Member] Parent Company [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Other operating expense Other Operating Income (Expense) [Member] SG&A expense Selling, General and Administrative Expenses [Member] Stock-based compensation expense Allocated Share-based Compensation Expense Impact of derivative instruments on borrowing costs Impact of Derivative Instruments on Borrowing Costs, Percent Increase (Decrease) Impact of Derivative Instruments on Borrowing Costs, Percent Increase (Decrease) 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] Schedule of Investments by Accounting Method Schedule of Investments by Accounting Method [Table Text Block] Schedule of Investments by Accounting Method [Table Text Block] Equity Method Investments Equity Method Investments [Table Text Block] CWC Term Loan B-3 Facility [Member] CWC Term Loan B-3 Facility [Member] CWC Term Loan B-3 Facility [Member] CWC Term Loans [Member] CWC Term Loans [Member] CWC Term Loans [Member] CWC Term Loan B-3 Facility Add-on [Member] CWC Term Loan B-3 Facility Add-on [Member] CWC Term Loan B-3 Facility Add-on [Member] Columbus Senior Notes [Member] Columbus Senior Notes [Member] Columbus Senior Notes [Member] Issue price percentage Debt Instrument, Original Issue Price, Percentage The issue price of the debt instrument, expressed as a percentage of the principal amount. Basis spread on variable rate Floor rate Payment for third-party costs Payment for Debt Extinguishment or Debt Prepayment Cost Write-off of unamortized discounts and deferred financing costs Write-off of Unamortized Debt Discount and Deferred Financing Cost Write-off of Unamortized Debt Discount and Deferred Financing Cost Segment Reporting [Abstract] Corporate and Other [Member] Corporate, Non-Segment [Member] European Operations Division Netherlands [Member] European Operations Division Netherlands [Member] European Operations Division Netherlands [Member] Total consolidated 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 Capital Lease Obligations Incurred Changes in current liabilities related to capital expenditures Increase Decrease in Current Liabilities Related to Capital Expenditures Increase Decrease in Current Liabilities Related to Capital Expenditures Total consolidated capital expenditures Payments for Capital Improvements Property and equipment additions - VodafoneZiggo JV Equity Method Investment, Summarized Financial Information, Payment to Acquire Property, Plant and Equipment Equity Method Investment, Summarized Financial Information, Payment to Acquire Property, Plant and Equipment Intersegment Eliminations [Member] Intersegment Eliminations [Member] Adjusted OIBDA Adjusted Operating Income (Loss) before Depreciation and Amortization Adjusted Operating Income (Loss) before Depreciation and Amortization Adjusted OIBDA Equity Method Investment, Summarized Financial Information, EBITDA Equity Method Investment, Summarized Financial Information, EBITDA Unrecorded Purchase Obligation Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Accounting Changes and Error Corrections [Abstract] Accounting change Cumulative Effect of New Accounting Principle in Period of Adoption 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] Cable [Member] Cable [Member] Cable [Member] Cable Subscription [Member] Cable Subscription [Member] Cable Subscription [Member] Cable Video Subscription [Member] Cable Video Subscription [Member] Cable Video Subscription [Member] Cable Broadband Internet Subscription [Member] Cable Broadband Internet Subscription [Member] Cable Broadband Internet Subscription [Member] Cable Fixed-line Telephony Subscription [Member] Cable Fixed-line Telephony Subscription [Member] Cable Fixed-line Telephony Subscription [Member] Cable Non-Subscription [Member] Cable Non-Subscription [Member] Cable Non-Subscription [Member] Residential [Member] Residential [Member] Residential [Member] Mobile Subscription [Member] Mobile Subscription [Member] Mobile Subscription [Member] Mobile Non-Subscription [Member] Mobile Non-Subscription [Member] Mobile Non-Subscription [Member] Mobile Residential [Member] Mobile Residential [Member] Mobile Residential [Member] Business to Business [Member] Business to Business [Member] Business to Business [Member] Business to Business Subscription [Member] Business to Business Subscription [Member] Business to Business Subscription [Member] Business to Business Non-Subscription [Member] Business to Business Non-Subscription [Member] Business to Business Non-Subscription [Member] Other Category [Member] Other Category [Member] Other Category [Member] Total Adjusted OIBDA of our consolidated reportable segments Share-based compensation expense Depreciation and amortization Impairment, restructuring and other operating items, net Operating income Operating Income (Loss) Interest expense Interest Expense Realized and unrealized gains (losses) on derivative instruments, net Foreign currency transaction gains (losses), net Realized and unrealized 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 Share of losses of affiliates, net Other income, net 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. Accounting Changes and Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] April 2023 UM Senior Secured Notes [Member] April 2023 UM Senior Secured Notes [Member] April 2023 UM Senior Secured Notes [Member] UM Term Loan B Facility [Member] UM Term Loan B Facility [Member] UM Term Loan B Facility [Member] January 2023 UM Dollar Senior Secured Notes [Member] January 2023 UM Dollar Senior Secured Notes [Member] January 2023 UM Dollar Senior Secured Notes [Member] January 2023 5.75% UM Euro Senior Secured Notes [Member] January 2023 5.75% UM Euro Senior Secured Notes [Member] January 2023 5.75% UM Euro Senior Secured Notes [Member] January 2023 5.125% UM Euro Senior Secured Notes [Member] January 2023 5.125% UM Euro Senior Secured Notes [Member] January 2023 5.125% UM Euro Senior Secured Notes [Member] 2022 UM Senior Secured Notes [Member] 2022 UM Senior Secured Notes [Member] 2022 UM Senior Secured Notes [Member] Percentage of principal amount redeemed Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Statement of Stockholders' Equity [Abstract] 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] Accounting change (note 2) Balance at January 1, 2017, as adjusted for accounting change Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance Net loss Other comprehensive earnings, net of taxes Share-based compensation (note 11) Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Adjustments due to changes in subsidiaries’ equity and other, net Stockholders' Equity, Other 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] Network and Connectivity Commitments [Member] Network and Connectivity Commitments [Member] Network and Connectivity Commitments [Member] Programming Commitments [Member] Programming Commitments [Member] Programming 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 2017 Unrecorded Unconditional Purchase Obligation, Due in Remainder of Fiscal Year 2018 Unrecorded Unconditional Purchase Obligation, Due within Two Years 2019 Unrecorded Unconditional Purchase Obligation, Due within Three Years 2020 Unrecorded Unconditional Purchase Obligation, Due within Four Years 2021 Unrecorded Unconditional Purchase Obligation, Due within Five Years 2022 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 Schedule of changes in share capital Schedule of Stockholders Equity [Table Text Block] Schedule of share repurchases Class of Treasury Stock [Table Text Block] 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] Indemnification Agreement [Member] Indemnification Agreement [Member] Interkabel Acquisition [Member] Interkabel Acquisition [Member] Interkabel Acquisition [Member] Deutsche Telekom Litigation [Member] Deutsche Telekom Litigation [Member] Deutsche Telekom 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] Other Regulatory Issues [Member] Unfavorable Regulatory Action [Member] Financial Standby Letter of Credit [Member] Financial Standby Letter of Credit [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Programming costs Programming Costs Programming Costs Estimate of possible loss Loss Contingency, Estimate of Possible Loss Letters of credit outstanding Letters of Credit Outstanding, Amount Number of associations of municipalities in Belgium Number of Associations of Municipalities in Belgium Number of Associations of Municipalities in Belgium Damages sought Loss Contingency, Damages Sought, Value Loss contingency damages in excess value Loss Contingency Damages In Excess Value Loss Contingency Damages In Excess Value Loss contingency accrual Loss Contingency Accrual 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 Interest expense Income Tax Examination, Interest Expense Unpaid VAT payment assessed Loss Contingency, Unpaid VAT Payment Assessed Loss Contingency, Unpaid VAT Payment Assessed Fair Value Measurements Fair Value Disclosures [Text Block] 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 Recent Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [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] Investment [Table] Investment [Table] ITV — subject to re-use rights ITV - Subject to Re-Use Rights [Member] ITV - Subject to Re-Use Rights [Member] Other Other Unnamed Investment [Member] Other Unnamed Investment [Member] Investment [Line Items] Investment [Line Items] Equity Equity Method Investments Fair value Cost Cost Method Investments Total Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Summarized results of operations of the VodafoneZiggo JV Equity Method Investment, Summarized Financial Information [Abstract] Loss before income taxes Equity Method Investment, Summarized Financial Information, Income (Loss) from Continuing Operations Net loss Equity Method Investment, Summarized Financial Information, Net Income (Loss) Income Statement [Abstract] Revenue (notes 4 and 15) Operating costs and expenses (exclusive of depreciation and amortization, shown separately below): Costs and Expenses [Abstract] Programming and other direct costs of services Cost of Services Other operating (note 11) Other Cost and Expense, Operating Selling, general and administrative (SG&A) (note 11) Selling, General and Administrative Expense Impairment, restructuring and other operating items, net (notes 3 and 12) 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 5) Foreign currency transaction gains (losses), net Realized and unrealized losses due to changes in fair values of certain investments and debt, net (notes 4, 6 and 8) Losses on debt modification and extinguishment, net (note 8) Share of losses of affiliates, net (note 4) 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 9) 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 13): 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 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 (in shares) 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 (in shares) Weighted Average Number of Shares Outstanding, Diluted Operating activities Payments for (Proceeds from) Derivative Instrument, Operating Activities Payments for (Proceeds from) Derivative Instrument, Operating Activities 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 Telenet Finance V [Member] Telenet Finance V [Member] Telenet Finance V [Member] Secured Debt [Member] Secured Debt [Member] Line of Credit [Member] Line of Credit [Member] Telenet Facility AH [Member] Telenet Facility AH [Member] Telenet Facility AH [Member] Telenet Facility AI [Member] Telenet Facility AI [Member] Telenet Facility AI [Member] Telenet Facility AE [Member] Telenet Facility AE [Member] Telenet Facility AE [Member] Telenet Facility AI Add-on [Member] Telenet Facility AI Add-on [Member] Telenet Facility AI Add-on [Member] Telenet Facility U [Member] Telenet Facility U [Member] Telenet Facility U [Member] 6.25% Telenet Senior Secured Notes [Member] 6.25% Telenet Senior Secured Notes [Member] 6.25% Telenet Senior Secured Notes [Member] Issue price percentage 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 Share-based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Telenet and Liberty Puerto Rico [Member] Telenet and Liberty Puerto Rico [Member] Telenet and Liberty Puerto Rico [Member] Outside of Latin America and Caribbean [Member] Outside of Latin America and Caribbean [Member] Outside of Latin America and Caribbean [Member] 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 [Table] Income Taxes [Table] Income Taxes [Table] 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 Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Servicio de Impuestos Internos [Member] Servicio de Impuestos Internos [Member] Servicio de Impuestos Internos [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 Percent of claim agreed by tax authority in Chile Percent of Claim Agreed by Tax Authority Percent of Claim Agreed by Tax Authority Interest Rate Swap [Member] Interest Rate Swap [Member] Income Tax Benefit (Expense) Reconciliation Table Income Tax Benefit Expense Reconciliation Table Text Block Income tax benefit expense Reconciliation table. Earnings or Loss per Share Earnings Per Share [Text Block]