3.20.1 html 150 277 1 false 66 0 false 5 false false R1.htm 0001001 - Document - Cover Page Sheet http://www.gci.net/role/CoverPage Cover Page Cover 1 false false R2.htm 1001002 - Statement - Condensed Consolidated Balance Sheets (unaudited) Sheet http://www.gci.net/role/CondensedConsolidatedBalanceSheetsunaudited Condensed Consolidated Balance Sheets (unaudited) Statements 2 false false R3.htm 1002003 - Statement - Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) Sheet http://www.gci.net/role/CondensedConsolidatedBalanceSheetsunauditedParenthetical Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) Statements 3 false false R4.htm 1003004 - Statement - Condensed Consolidated Statements of Operations (Unaudited) Sheet http://www.gci.net/role/CondensedConsolidatedStatementsofOperationsUnaudited Condensed Consolidated Statements of Operations (Unaudited) Statements 4 false false R5.htm 1004005 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) Sheet http://www.gci.net/role/CondensedConsolidatedStatementsofCashFlowsUnaudited Condensed Consolidated Statements of Cash Flows (Unaudited) Statements 5 false false R6.htm 1005006 - Statement - Condensed Consolidated Statements of Equity (Unaudited) Sheet http://www.gci.net/role/CondensedConsolidatedStatementsofEquityUnaudited Condensed Consolidated Statements of Equity (Unaudited) Statements 6 false false R7.htm 2101101 - Disclosure - Basis of Presentation Sheet http://www.gci.net/role/BasisofPresentation Basis of Presentation Notes 7 false false R8.htm 2103102 - Disclosure - Assets and Liabilities Measured at Fair Value Sheet http://www.gci.net/role/AssetsandLiabilitiesMeasuredatFairValue Assets and Liabilities Measured at Fair Value Notes 8 false false R9.htm 2108103 - Disclosure - Investments in Equity Securities Sheet http://www.gci.net/role/InvestmentsinEquitySecurities Investments in Equity Securities Notes 9 false false R10.htm 2111104 - Disclosure - Investments in Affiliates Accounted for Using the Equity Method Sheet http://www.gci.net/role/InvestmentsinAffiliatesAccountedforUsingtheEquityMethod Investments in Affiliates Accounted for Using the Equity Method Notes 10 false false R11.htm 2116105 - Disclosure - Intangible Assets Sheet http://www.gci.net/role/IntangibleAssets Intangible Assets Notes 11 false false R12.htm 2121106 - Disclosure - Debt Sheet http://www.gci.net/role/Debt Debt Notes 12 false false R13.htm 2129107 - Disclosure - Stock-Based Compensation Sheet http://www.gci.net/role/StockBasedCompensation Stock-Based Compensation Notes 13 false false R14.htm 2133108 - Disclosure - Commitments and Contingencies Sheet http://www.gci.net/role/CommitmentsandContingencies Commitments and Contingencies Notes 14 false false R15.htm 2134109 - Disclosure - Information About the Company's Operating Segments Sheet http://www.gci.net/role/InformationAbouttheCompanysOperatingSegments Information About the Company's Operating Segments Notes 15 false false R16.htm 2304301 - Disclosure - Assets and Liabilities Measured at Fair Value (Tables) Sheet http://www.gci.net/role/AssetsandLiabilitiesMeasuredatFairValueTables Assets and Liabilities Measured at Fair Value (Tables) Tables http://www.gci.net/role/AssetsandLiabilitiesMeasuredatFairValue 16 false false R17.htm 2309302 - Disclosure - Investments in Equity Securities (Tables) Sheet http://www.gci.net/role/InvestmentsinEquitySecuritiesTables Investments in Equity Securities (Tables) Tables http://www.gci.net/role/InvestmentsinEquitySecurities 17 false false R18.htm 2312303 - Disclosure - Investments in Affiliates Accounted for Using the Equity Method (Tables) Sheet http://www.gci.net/role/InvestmentsinAffiliatesAccountedforUsingtheEquityMethodTables Investments in Affiliates Accounted for Using the Equity Method (Tables) Tables http://www.gci.net/role/InvestmentsinAffiliatesAccountedforUsingtheEquityMethod 18 false false R19.htm 2317304 - Disclosure - Intangible Assets (Tables) Sheet http://www.gci.net/role/IntangibleAssetsTables Intangible Assets (Tables) Tables http://www.gci.net/role/IntangibleAssets 19 false false R20.htm 2322305 - Disclosure - Debt (Tables) Sheet http://www.gci.net/role/DebtTables Debt (Tables) Tables http://www.gci.net/role/Debt 20 false false R21.htm 2330306 - Disclosure - Stock-Based Compensation (Tables) Sheet http://www.gci.net/role/StockBasedCompensationTables Stock-Based Compensation (Tables) Tables http://www.gci.net/role/StockBasedCompensation 21 false false R22.htm 2335307 - Disclosure - Information About the Company's Operating Segments (Tables) Sheet http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsTables Information About the Company's Operating Segments (Tables) Tables http://www.gci.net/role/InformationAbouttheCompanysOperatingSegments 22 false false R23.htm 2402401 - Disclosure - Basis of Presentation (Details) Sheet http://www.gci.net/role/BasisofPresentationDetails Basis of Presentation (Details) Details http://www.gci.net/role/BasisofPresentation 23 false false R24.htm 2405402 - Disclosure - Assets and Liabilities Measured at Fair Value - (Schedule of Assets and Liabilities) (Details) Sheet http://www.gci.net/role/AssetsandLiabilitiesMeasuredatFairValueScheduleofAssetsandLiabilitiesDetails Assets and Liabilities Measured at Fair Value - (Schedule of Assets and Liabilities) (Details) Details http://www.gci.net/role/AssetsandLiabilitiesMeasuredatFairValueTables 24 false false R25.htm 2406403 - Disclosure - Assets and Liabilities Measured at Fair Value - (Narrative) (Details) Sheet http://www.gci.net/role/AssetsandLiabilitiesMeasuredatFairValueNarrativeDetails Assets and Liabilities Measured at Fair Value - (Narrative) (Details) Details http://www.gci.net/role/AssetsandLiabilitiesMeasuredatFairValueTables 25 false false R26.htm 2407404 - Disclosure - Assets and Liabilities Measured at Fair Value - (Schedule of Realized and Unrealized Gains (Losses)) (Details) Sheet http://www.gci.net/role/AssetsandLiabilitiesMeasuredatFairValueScheduleofRealizedandUnrealizedGainsLossesDetails Assets and Liabilities Measured at Fair Value - (Schedule of Realized and Unrealized Gains (Losses)) (Details) Details http://www.gci.net/role/AssetsandLiabilitiesMeasuredatFairValueTables 26 false false R27.htm 2410405 - Disclosure - Investments in Equity Securities (Details) Sheet http://www.gci.net/role/InvestmentsinEquitySecuritiesDetails Investments in Equity Securities (Details) Details http://www.gci.net/role/InvestmentsinEquitySecuritiesTables 27 false false R28.htm 2413406 - Disclosure - Investments in Affiliates Accounted for Using the Equity Method - (Investment in Lending Tree) (Details) Sheet http://www.gci.net/role/InvestmentsinAffiliatesAccountedforUsingtheEquityMethodInvestmentinLendingTreeDetails Investments in Affiliates Accounted for Using the Equity Method - (Investment in Lending Tree) (Details) Details http://www.gci.net/role/InvestmentsinAffiliatesAccountedforUsingtheEquityMethodTables 28 false false R29.htm 2414407 - Disclosure - Investments in Affiliates Accounted for Using the Equity Method - (Investment in Liberty Broadband) (Details) Sheet http://www.gci.net/role/InvestmentsinAffiliatesAccountedforUsingtheEquityMethodInvestmentinLibertyBroadbandDetails Investments in Affiliates Accounted for Using the Equity Method - (Investment in Liberty Broadband) (Details) Details http://www.gci.net/role/InvestmentsinAffiliatesAccountedforUsingtheEquityMethodTables 29 false false R30.htm 2415408 - Disclosure - Investments in Affiliates Accounted for Using the Equity Method - (Summary of Financial Information) (Details) Sheet http://www.gci.net/role/InvestmentsinAffiliatesAccountedforUsingtheEquityMethodSummaryofFinancialInformationDetails Investments in Affiliates Accounted for Using the Equity Method - (Summary of Financial Information) (Details) Details http://www.gci.net/role/InvestmentsinAffiliatesAccountedforUsingtheEquityMethodTables 30 false false R31.htm 2418409 - Disclosure - Intangible Assets - (Intangibles Subject to Amortization) (Details) Sheet http://www.gci.net/role/IntangibleAssetsIntangiblesSubjecttoAmortizationDetails Intangible Assets - (Intangibles Subject to Amortization) (Details) Details http://www.gci.net/role/IntangibleAssetsTables 31 false false R32.htm 2419410 - Disclosure - Intangible Assets - (Narrative) (Details) Sheet http://www.gci.net/role/IntangibleAssetsNarrativeDetails Intangible Assets - (Narrative) (Details) Details http://www.gci.net/role/IntangibleAssetsTables 32 false false R33.htm 2420411 - Disclosure - Intangible Assets - (Future Amortization) (Details) Sheet http://www.gci.net/role/IntangibleAssetsFutureAmortizationDetails Intangible Assets - (Future Amortization) (Details) Details http://www.gci.net/role/IntangibleAssetsTables 33 false false R34.htm 2423412 - Disclosure - Debt - (Summary of Debt) (Details) Sheet http://www.gci.net/role/DebtSummaryofDebtDetails Debt - (Summary of Debt) (Details) Details 34 false false R35.htm 2424413 - Disclosure - Debt - (Margin Loan) (Details) Sheet http://www.gci.net/role/DebtMarginLoanDetails Debt - (Margin Loan) (Details) Details 35 false false R36.htm 2425414 - Disclosure - Debt - (Senior Notes) (Details) Notes http://www.gci.net/role/DebtSeniorNotesDetails Debt - (Senior Notes) (Details) Details 36 false false R37.htm 2426415 - Disclosure - Debt - (Senior Credit Facility) (Details) Sheet http://www.gci.net/role/DebtSeniorCreditFacilityDetails Debt - (Senior Credit Facility) (Details) Details 37 false false R38.htm 2427416 - Disclosure - Debt - (Wells Fargo Note Payable) (Details) Sheet http://www.gci.net/role/DebtWellsFargoNotePayableDetails Debt - (Wells Fargo Note Payable) (Details) Details 38 false false R39.htm 2428417 - Disclosure - Debt - (Fair Value of Debt) (Details) Sheet http://www.gci.net/role/DebtFairValueofDebtDetails Debt - (Fair Value of Debt) (Details) Details 39 false false R40.htm 2431418 - Disclosure - Stock-Based Compensation - (Narrative) (Details) Sheet http://www.gci.net/role/StockBasedCompensationNarrativeDetails Stock-Based Compensation - (Narrative) (Details) Details http://www.gci.net/role/StockBasedCompensationTables 40 false false R41.htm 2432419 - Disclosure - Stock-Based Compensation - (Schedule of Outstanding Awards) (Details) Sheet http://www.gci.net/role/StockBasedCompensationScheduleofOutstandingAwardsDetails Stock-Based Compensation - (Schedule of Outstanding Awards) (Details) Details http://www.gci.net/role/StockBasedCompensationTables 41 false false R42.htm 2436420 - Disclosure - Information About the Company's Operating Segments - (Performance Measures) (Details) Sheet http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsPerformanceMeasuresDetails Information About the Company's Operating Segments - (Performance Measures) (Details) Details http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsTables 42 false false R43.htm 2437421 - Disclosure - Information About the Company's Operating Segments - (Narrative) (Details) Sheet http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsNarrativeDetails Information About the Company's Operating Segments - (Narrative) (Details) Details http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsTables 43 false false R44.htm 2438422 - Disclosure - Information About the Company's Operating Segments - (Remaining Performance Obligation) (Details) Sheet http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsRemainingPerformanceObligationDetails Information About the Company's Operating Segments - (Remaining Performance Obligation) (Details) Details http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsTables 44 false false R45.htm 2439423 - Disclosure - Information About the Company's Operating Segments - (Adjusted OIBDA) (Details) Sheet http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsAdjustedOIBDADetails Information About the Company's Operating Segments - (Adjusted OIBDA) (Details) Details http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsTables 45 false false R46.htm 2440424 - Disclosure - Information About the Company's Operating Segments - (Other Information) (Details) Sheet http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsOtherInformationDetails Information About the Company's Operating Segments - (Other Information) (Details) Details http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsTables 46 false false R47.htm 2441425 - Disclosure - Information About the Company's Operating Segments - (Reconciliation of Segment Adjusted OIBDA to Operating Income and Earnings (Loss) from Continuing Operations) (Details) Sheet http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsReconciliationofSegmentAdjustedOIBDAtoOperatingIncomeandEarningsLossfromContinuingOperationsDetails Information About the Company's Operating Segments - (Reconciliation of Segment Adjusted OIBDA to Operating Income and Earnings (Loss) from Continuing Operations) (Details) Details http://www.gci.net/role/InformationAbouttheCompanysOperatingSegmentsTables 47 false false R9999.htm Uncategorized Items - gcillc-20200331.htm Sheet http://xbrl.sec.gov/role/uncategorizedFacts Uncategorized Items - gcillc-20200331.htm Cover 48 false false All Reports Book All Reports gcillc-20200331.htm ex99-llcrecon03312020.htm gcillc-20200331.xsd gcillc-20200331_cal.xml gcillc-20200331_def.xml gcillc-20200331_lab.xml gcillc-20200331_pre.xml llc03312020exhibit311.htm llc03312020exhibit312.htm llc03312020exhibit32.htm http://fasb.org/us-gaap/2019-01-31 http://xbrl.sec.gov/dei/2019-01-31 http://fasb.org/srt/2019-01-31 true true