Document and Entity Information Statement [Table] Class of Stock [Axis] Class of Stock [Domain] Common Class A [Member] Series A GCI Group common stock Class A Common Class B [Member] Series B GCI Group common stock Class B Common Class C [Member] Series C GCI Group common stock Class C Statement [Line Items] Document Type Document Quarterly Report Document Period End Date Document Transition Report Securities Act File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Ex Transition Period Entity Shell Company Entity Common Stock, Shares Outstanding Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Condensed Consolidated Balance Sheets Indefinite-Lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Represents information pertaining to cable certificates. Cable Certificates [Member] Cable certificates Other Intangible Assets [Member] Other Other amortizable intangible assets Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and Cash Equivalent Cash and cash equivalents Accounts and Other Receivables, Net, Current Trade and other receivables, net of allowance for credit losses of $3 and $4, respectively Prepaid Expense and Other Assets, Current Prepaid and other current assets Assets, Current Total current assets Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Property and equipment, net Goodwill Balance at ending, Goodwill Balance at beginning, Goodwill Goodwill Indefinite-Lived Intangible Assets (Excluding Goodwill) Balance at ending, Cable Certificates and Other Balance at beginning, Cable Certificates and Other Indefinite lived intangible assets (excluding goodwill) Amount of assets, including goodwill, lacking physical substance and having a projected indefinite period of benefit. Indefinite Lived Intangible Assets Including Goodwill Total Intangible assets not subject to amortization Finite-Lived Intangible Assets, Net Intangible assets subject to amortization, net (note 4) Net carrying amount Deferred Income Tax Assets, Net Deferred income tax assets Other Assets, Noncurrent Other assets, net Assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and Equity Liabilities, Current [Abstract] Current liabilities: Accounts Payable and Accrued Liabilities, Current Accounts payable and accrued liabilities Contract with Customer, Liability, Current Deferred revenue Long-Term Debt, Current Maturities Debt classified as current Current portion of debt (note 5) Taxes Payable, Current State income taxes payable Other Liabilities, Current Other current liabilities Liabilities, Current Total current liabilities Long-Term Debt, Excluding Current Maturities Long-term debt, net (note 5) Total long-term debt The amount of obligations under finance tower obligations, excluding the current portion. Tower Obligations, Noncurrent Obligations under tower obligations Contract with Customer, Liability, Noncurrent Long-term deferred revenue Other Liabilities, Noncurrent Other liabilities Liabilities Liabilities Total liabilities Redeemable Noncontrolling Interest, Equity, Carrying Amount Redeemable noncontrolling interest in equity of subsidiary Equity, Attributable to Parent [Abstract] Equity Members' Equity [Abstract] Member's equity: Common Stock, Value, Issued Common stock value Additional Paid in Capital, Common Stock Additional paid-in capital Retained Earnings (Accumulated Deficit) Retained earnings (deficit) Equity, Attributable to Parent Ending balance Beginning balance Total equity Commitments and Contingencies Commitments and contingencies (note 8) Liabilities and Equity Total liabilities and equity Accounts Receivable, Allowance for Credit Loss, Current Allowance for credit losses Common Stock, Par or Stated Value Per Share Common stock par value Common Stock, Shares Authorized Common stock shares authorized Common Stock, Shares, Issued Common stock shares issued Common Stock, Shares, Outstanding Common stock shares outstanding Condensed Consolidated Statements of Operations Revenue from Contract with Customer, Excluding Assessed Tax Revenue Revenue from Contract with Customer, Product and Service [Extensible Enumeration] Revenue from Contract with Customer, Product and Service [Extensible Enumeration] Costs and Expenses [Abstract] Operating costs and expenses: Other Cost and Expense, Operating Operating expense (exclusive of depreciation and amortization) Total operating expenses The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc., and also includes stock-based compensation. Selling General And Administrative Expense Including Stock Based Compensation Selling, general and administrative expense (including stock-based compensation) Depreciation, Depletion and Amortization Depreciation and amortization Goodwill and Intangible Asset Impairment Impairment of goodwill and intangible assets Impairment of goodwill and intangible assets Business Combination, Acquisition-Related Cost, Expense Acquisition costs Costs and Expenses Total operating costs and expenses Operating Income (Loss) Operating income (loss) Nonoperating Income (Expense) [Abstract] Other income (expense): Interest Expense, Nonoperating Interest expense (including amortization of deferred loan fees) Investment Income, Interest and Dividend Interest and dividend income Other Nonoperating Income (Expense) Other, net Nonoperating Income (Expense) Total other income (expense) Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Earnings (loss) before income taxes Income Tax Expense (Benefit) Income tax benefit (expense) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net earnings (loss) Earnings Per Share, Basic Basic net earnings (loss) attributable to Series A, Series B and Series C GCI Group shareholders per common share (note 2) Earnings Per Share, Diluted Diluted net earnings (loss) attributable to Series A, Series B and Series C GCI Group shareholders per common share (note 2) Condensed Consolidated Statements of Cash Flows Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Cash flows from operating activities: Net earnings (loss) Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net earnings (loss) to net cash from operating activities: Share-Based Payment Arrangement, Noncash Expense Stock-based compensation Deferred Income Tax Expense (Benefit) Deferred income tax expense (benefit) Amount of non-cash changes in taxes payable. Non Cash Changes In Taxes Payable Non-cash changes in taxes payable Other Noncash Income (Expense) Other, net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Change in other assets and liabilities: Increase (Decrease) in Accounts Receivable Decrease (increase) in accounts receivable Finance Lease, Right-of-Use Asset, Amortization Amortization of right-of-use asset Increase (Decrease) in Other Noncurrent Assets Decrease (increase) in other assets Increase (Decrease) in Operating Lease Liability (Decrease) increase in operating lease liabilities Increase (Decrease) in Income Taxes Payable (Decrease) increase in taxes payable Amount of increase (decrease) in payables and noncurrent operating liabilities classified as other. Increase Decrease In Payables And Other Liabilities (Decrease) increase in payables and other liabilities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash provided by (used in) operating activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Cash flows from investing activities: Payments to Acquire Businesses, Gross Cash paid for acquisitions, net of cash acquired Payments for business acquisition The cash outflow for the purchase of amounts due from customers, clients, lessees, borrowers, or others under the terms of its agreements therewith. Payments to Acquire Finance Receivables1 Loan to Quintillion (note 1) Payments to Acquire Property, Plant, and Equipment Capital expenditures The cash inflow from grants received for capital expenditures. Proceeds From Grant For Capital Expenditures Grant proceeds received for capital expenditures Payments to Acquire Investments Purchase of investments Payments to acquire investment securities Proceeds from Sale of Equity Securities, FV-NI Proceeds from sale of investments Sale of investments Payment for (Proceeds from) Other Investing Activity Other investing activities, net Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash provided by (used in) investing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Cash flows from financing activities: Proceeds from Issuance of Long-Term Debt Borrowings of debt Repayment Of Debt, Finance Lease Obligation, And Sale Lease Back Obligation. Repayment Of Debt Finance Lease Obligation And Sale Lease Back Obligation Repayment of debt and tower obligations Proceeds from (Payment for) Other Financing Activity Other financing activities, net Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash provided by (used in) financing activities Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Cash, cash equivalents and restricted cash, end of period Cash, cash equivalents and restricted cash, beginning of period Total cash and cash equivalents and restricted cash at end of period Restricted Cash and Cash Equivalent, Current Restricted cash included in other current assets Restricted Cash and Cash Equivalent, Current, Statement of Financial Position [Extensible Enumeration] Restricted Cash and Cash Equivalent, Noncurrent Restricted cash included in other long-term assets Restricted Cash and Cash Equivalent, Noncurrent, Statement of Financial Position [Extensible Enumeration] Condensed Consolidated Statements of Equity Equity Components [Axis] Equity Component [Domain] Member Units [Member] Former Member's Investment Additional Paid-in Capital [Member] Additional paid-in capital Retained Earnings [Member] Retained earnings (deficit) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Stock-based compensation The amount of change in equity due to capitalization in connection with the separation. Members Equity, Change in Capitalization in Connection with the Separation Change in capitalization in connection with the Separation Stockholders' Equity, Other Other Basis of Presentation Basis of Accounting [Text Block] Basis of Presentation Earnings (Loss) Per Common Share Earnings Per Share [Text Block] Earnings (Loss) Per Common Share Revenue Recognition Revenue from Contract with Customer [Text Block] Revenue Recognition Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets Debt Debt Disclosure [Text Block] Debt No definition available. Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Variable Interest Entities Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Stock-Based Compensation Commitments and Contingencies. Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Segment Information Segment Reporting Disclosure [Text Block] Segment Information Schedule of Weighted Average Number of Shares [Table Text Block] Summary of earnings (loss) per common share Disaggregation of Revenue [Table Text Block] Summary of revenue from contracts with customers Tabular disclosure of goodwill and assets, excluding financial assets lacking physical substance and exist in perpetuity, by either major class or business segment. Schedule of Indefinite-Lived Intangible Assets and Goodwill [Table Text Block] Summary of goodwill and indefinite lived intangible assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of intangible assets subject to amortization Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of estimated amortization expense for amortizable intangible assets Schedule of Debt [Table Text Block] Schedule of debt The tabular disclosure of information pertaining to New Markets Tax Credit Entities transactions. Schedule of Transactions with New Market Tax Credit Entities [Table Text Block] Schedule of key terms of each of the NMTC transactions Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Schedule of RSUs granted Share-Based Payment Arrangement, Option, Activity [Table Text Block] Schedule of number and weighted average exercise price of options Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Schedule of RSUs activity Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of significant segment expenses Collaborative Arrangement and Arrangement Other than Collaborative [Table] Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Domain] Affiliated Entity [Member] Affiliated Entity Counterparty Name [Axis] Counterparty Name [Domain] Represents information pertaining to Liberty Broadband. Liberty Broadband [Member] Liberty Broadband Represents information pertaining to Liberty Media. Liberty Media [Member] Liberty Media Measurement Frequency [Axis] Measurement Frequency [Domain] Fair Value, Recurring [Member] Recurring Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Level 1 Fair Value, Inputs, Level 2 [Member] Level 2 Preferred stock securities that do not empower a holder to vote on corporate resolutions or the election of directors. Nonvoting Preferred Stock [Member] Non-voting preferred stock Ownership [Axis] Ownership [Domain] Represents information pertaining to GCI, LLC, GCI Holdings, LLC and their subsidiaries. GCI, LLC, GCI Holdings, LLC and Their Subsidiaries [Member] GCI Business Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Basis of Presentation Percentage of outstanding equity interests held in entities. Percentage of Ownership Interest Held in Entities Percentage of interest Stock Issued During Period, Shares, New Issues Number of shares issued Preferred Stock, Dividend Rate, Percentage Dividend rate Preferred Stock, Liquidation Preference Per Share Liquidation price Amount reimbursed for the expense incurred. Reimbursement Amount for Expense Incurred Amount reimbursable Represents the number of rights for each share of common stock. Class Of Warrant Or Right Number Of Rights Per Share Of Common Stock Number of rights issued per share Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Number of shares per right Class of Warrant or Right, Exercise Price of Warrants or Rights Exercise price of a right Discount rate from volume weighted average price for exercise of warrant or right. Class Of Warrant Or Right, Discount From Volume Weighted Average Price Percentage of discount from trading price Threshold number of trading days for computation of volume weighted average price to determine exercise price of warrant or right. Class Of Warrant Or Right, Threshold Trading Days, For Computation Of Volume Weighted Average Price Threshold number of trading days for determining exercise price Proceeds from Issuance of Common Stock Proceeds from rights offering Cash Equivalents, at Carrying Value Cash equivalents Cash Amount of federal income taxes payable that were cancelled. Federal Income Taxes Payable Cancelled Federal income taxes payable cancelled Business Combination [Table] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event Business Combination [Axis] Business Combination [Domain] Information pertaining to Q Gateway Intermediate Holdings, LLC ("Quintillion"). Quintillion [Member] Quintillion Represents information pertaining to SPITwSPOTS, Inc. SPITwSPOTS, Inc [Member] SPITwSPOTS, Inc Statistical Measurement [Axis] Statistical Measurement [Domain] Maximum [Member] Maximum Business Combination [Line Items] The amount of reimbursement for certain capital expenditures in a business acquisition. Reimbursement For Certain Capital Expenditures Reimbursement for certain capital expenditures Debt Instrument, Face Amount Loan to Unicom Outstanding principal Initial principal amount Description of reference rate used for variable rate of loan receivable. Loans Receivable Description Of Variable Rate Basis 1 Variable rate basis Loans Receivable, Basis Spread on Variable Rate Note receivable basis spread Percentage added to reference rate used to compute variable rate on loan receivable under certain conditions. Note receivable basis spread subject to certain conditions Basis spread under certain conditions Nontrade Receivables Note receivable Carrying amounts due as of the balance sheet date of the sum of amounts receivable other than from customers excluding accrued interest. Nontrade Receivables Excluding Interest Initial principal amount Interest Receivable Accrued paid-in-kind interest Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Fixed assets Amount of asset acquired in business combination and recognized at acquisition date, classified as other. Business Combination, Recognized Asset Acquired, Other Asset Other assets Amount of liability assumed in business combination and recognized at acquisition date, classified as other. Business Combination, Recognized Liability Assumed, Other Liability Other liabilities Related Party Transaction [Table] Investment, Name [Axis] Investment, Name [Domain] Information pertaining to Liberty Latin America Ltd. ("LLA"). Liberty Latin America Ltd [Member] LLA Related Party [Member] Board of Directors Chairman [Member] Board of Directors Chairman Represents information pertaining to John C. Malone. John C. Malone [Member] John C. Malone Related Party Transaction [Line Items] Number of shares of investments that were acquired during the period. Investment Shares Acquired Shares acquired Per share amount received for each share of common stock sold. Sale of Investment, Price Per Share Investment sold price per share Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Earnings (Loss) Per Common Share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Potential common shares Weighted Average Number of Shares Outstanding, Basic Basic WASO Weighted Average Number of Shares Outstanding, Diluted Diluted WASO Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue Recognition Contract with Customer, Receivable, after Allowance for Credit Loss Receivables Contract with Customer, Liability Deferred revenue Revenue, Remaining Performance Obligation, Amount Revenue remaining, performance obligation Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Revenue remaining, performance obligation, expected timing of satisfaction Disaggregation of Revenue [Table] Product and Service [Axis] Product and Service [Domain] Represents information pertaining to consumer revenue. Consumer Revenue [Member] Consumer Revenue Consumer Represents information pertaining to data consumer revenue. Consumer Revenue, Data [Member] Consumer Revenue, Data Represents information pertaining to wireless consumer revenue. Consumer Revenue, Wireless [Member] Consumer Revenue, Wireless Represents information pertaining to other consumer revenue. Consumer Revenue, Other [Member] Consumer Revenue, Other Represents information pertaining to business revenue. Business Revenue [Member] Business Revenue Business Represents information pertaining to data business revenue. Business Revenue, Data [Member] Business Revenue, Data Represents information pertaining to wireless business revenue. Business Revenue, Wireless [Member] Business Revenue, Wireless Represents information pertaining to other business revenue. Business Revenue, Other [Member] Business Revenue, Other Represents information pertaining to lease, grant, and revenue from subsidies. Lease, Grant and Revenue from Subsidies [Member] Lease, grant, and revenue from subsidies Disaggregation of Revenue [Line Items] Revenue Recognition Government Assistance [Table] Minimum [Member] Minimum Government Assistance [Line Items] Revenue Recognition Government Assistance, Transaction Duration Government assistance transaction duration Amount of government grant deferred classified as current. Deferred Government Grant, Current Short-term deferred revenue Amount of government grant deferred classified as non-current. Deferred Government Grant, Non Current Long-term deferred revenue Goodwill [Table] Franchise Rights [Member] Cable Certificates Goodwill [Line Items] Goodwill and Intangible Assets Goodwill [Roll Forward] Goodwill Goodwill, Acquired During Period Acquisitions, Goodwill Indefinite-Lived Intangible Assets [Roll Forward] Cable Certificates and Other No definition available. Indefinite-Lived Intangible Assets Including Goodwill [Roll Forward] Total Amount of goodwill and assets, excluding financial assets lacking physical substance and having a projected indefinite period of benefit. Indefinite-Lived Intangible Asset Including Goodwill Balance at ending Balance at beginning Amount of increase in assets, excluding financial assets, lacking physical substance with an indefinite life including goodwill, from an acquisition. Indefinite-Lived Intangible Assets and Goodwill Acquired Acquisitions Intangible Asset, Finite-Lived [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships [Member] Customer relationships Finite-Lived Intangible Assets [Line Items] Goodwill and Intangible Assets Finite-Lived Intangible Assets, Gross Gross carrying amount Finite-Lived Intangible Assets, Accumulated Amortization Accumulated amortization Amortization of Intangible Assets Amortization expense Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Remainder of 2026 Finite-Lived Intangible Asset, Expected Amortization, Year One 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Two 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Three 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Four 2030 Schedule of Long-Term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument, Name [Domain] The 4.75% senior notes due 2028. Senior Notes 4.75 Percent Due 2028 [Member] 4.75% Senior Notes Due 2028 Senior Notes Line of Credit [Member] Senior Credit Facility Notes Payable to Banks [Member] Other Debt Instrument [Line Items] Debt Long-Term Debt, Gross Outstanding Principal Outstanding amount Amount, after unamortized (discount) premium, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Debt Instrument Net Of Unamortized Discount Premium Carrying value Debt Issuance Costs, Net Deferred financing costs Long-Term Debt Total debt Debt Instrument, Interest Rate, Stated Percentage Interest rate Interest rate (as percent) Debt Instrument, Unamortized Premium Aggregate unamortized premium Debt Instrument, Repurchase Amount Senior notes repurchased Gain (Loss) on Extinguishment of Debt Gain on extinguishment of debt Revolving Credit Facility [Member] Revolving credit facility Letter of Credit [Member] Letters of credit Standby Letters of Credit [Member] Standby letters of credit Represents information pertaining to term loan A. Term Loana [Member] Term Loan A Represents information pertaining to term loan A-1. Term Loan A1 [Member] Term A-1 Loan Represents information pertaining to term loan A-2. Term Loan A2 [Member] Term A-2 Loan Represents information pertaining to term loan A-3. Term Loan A3 [Member] Term A-3 Loan The information regarding senior credit facilities available. Senior Credit Facility [Member] Senior Credit Facility Variable Rate [Axis] Variable Rate [Domain] Secured Overnight Financing Rate (SOFR) [Member] SOFR Represents information pertaining to alternate base rate. Alternate Base Rate [Member] Alternate base rate Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity Additional borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Line of Credit Facility, Additional Borrowing Capacity Additional borrowing capacity The number of days stipulated for springing the maturity per the agreement. Number Of Days Stipulated For Springing Maturity Per Agreement Number of days stipulated for springing maturity per the agreement Debt Instrument, Basis Spread on Variable Rate Basis spread on variable rate The percentage of original principal amount to be paid as periodic payments. Debt Instrument, Periodic Payment, Percentage of Original Principal Percentage of original principal amount The increased percentage of original principal amount to be paid as periodic payments depending on leverage ratio. Debt Instrument, Periodic Payment, Increased Percentage of Original Principal Change in percentage of original principal amount Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Commitment fee (as percent) Debt Instrument, Interest Rate, Effective Percentage Interest rate (as a percent) The threshold ratio of first lien leverage ratio under the terms of debt instrument . Debt Instrument Threshold, First Lien Leverage Ratio First lien leverage ratio Line of Credit Facility, Remaining Borrowing Capacity Amount available for borrowing Long-Term Debt, Fair Value Fair value Variable Interest Entity [Table] Legal Entity [Axis] All Entities [Member] Represents the member information pertaining to Bank. Bank [Member] Bank Consolidated Entities [Axis] Consolidated Entities [Domain] Represents the member information pertaining to Unicom, Inc. Unicom, Inc [Member] Unicom Information by type of transaction date. Transaction Date [Axis] Information by type of transaction date. Transaction Date [Domain] Represents the information pertaining to October 2, 2019. October 2, 2019 [Member] October 2, 2019 Represents the information pertaining to November 24, 2020. November 24, 2020 [Member] November 24, 2020 Represents the information pertaining to March 29, 2022. March 29, 2022 [Member] March 29, 2022 Represents the information pertaining to December 21, 2022. December 21, 2022 [Member] December 21, 2022 Represents the information pertaining to May 2, 2023. May 2, 2023 [Member] May 2, 2023 Represents the information pertaining to April 14, 2025. April 14, 2025 [Member] April 14, 2025 Represents the information pertaining to July 30, 2026. July 30, 2026 [Member] July 30, 2026 Variable Interest Entity [Line Items] Variable Interest Entities Restricted Cash Restricted cash The amount of indemnification for any loss or recaptures. Indemnification Amount for Any Loss or Recapture Indemnification amount for any loss or recapture The amount of tax credit recaptures. Tax Credit Recaptures Tax credit recaptures Loans Receivable with Fixed Rates of Interest Loans to investment fund The loans receivable stated interest rate. Loans Receivable Stated Interest Rate Interest rate on loan to investment fund Amount of investment in the VIE. Variable Interest Entity Investment Bank Investment Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entities Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Stock-Based Compensation Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Shares of GCI Share-Based Payment Arrangement, Expense Stock-based compensation expense Represents the member information pertaining to time-based restricted stock units (RSUs) Time Based Restricted Units [Member] Time-based restricted stock units Represents the member information pertaining to performance based restricted stock units (RSUs). Performance Based Restricted Stock Units [Member] Performance based restricted stock units Title and Position [Axis] Title and Position [Domain] Represents information pertaining to employees and directors. Employees And Directors [Member] Employees and directors Represents information pertaining to employees. Employees [Member] Employees Chief Executive Officer [Member] Chief executive officer Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Granted RSU's granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Granted Weighted average GDFV Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Grant of options to purchase Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Dividend rate (in %) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Balance ending Balance beginning Share-based payment award, options, outstanding, number Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted average exercise price (WAEP) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Balance ending Balance beginning Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted average remaining outstanding life (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Weighted average remaining exercisable life (in years) Restricted Stock Units (RSUs) [Member] RSUs Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of RSU's Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Balance ending Balance beginning Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited/Cancelled Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted average GDFV Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted average GDFV at ending Weighted average GDFV at beginning Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Forfeited/Cancelled Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Total unrecognized compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Weighted average period for recognition Common Stock, Capital Shares Reserved for Future Issuance GCI Liberty reserved shares Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Domain] Represents information pertaining to single reportable segment. Single Reportable Segment [Member] Single reportable segment Customer [Axis] Customer [Domain] Represents information pertaining to technology revenue. Technology Revenue [Member] Technology Segment Reporting Information [Line Items] Segment Information Number of Reportable Segments Number of reportable segments