LUMN


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued

us-gaap:PreferredStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted
us-gaap:ConsolidationItems
us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfGoodsAndServicesSold
us-gaap:AdjustmentsForChangeInAccountingPrinciple
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:CostsAndExpenses

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:LongtermDebtType

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NonoperatingIncomeExpense
us-gaap:ConsolidationItems

us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherNonoperatingIncomeExpense
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:Revenues
us-gaap:AdjustmentsForChangeInAccountingPrinciple
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:ProductOrService
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService

us-gaap:SellingGeneralAndAdministrativeExpense
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:Assets

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:TaxesPayableCurrent

us-gaap:LongTermDebt

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
us-gaap:RetirementPlanType

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation
us-gaap:ConsolidationItems

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsOfDividends

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits
us-gaap:IncomeTaxAuthority

us-gaap:DeferredTaxAssetsValuationAllowance
us-gaap:CapitalizedContractCost
ctl:CapitalizedContractCostIncurred

ctl:IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

ctl:OperatingExpensesExcludingDepreciationAmortizationAndImpairment
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

ctl:OperatingLeaseLeaseIncomePercentOfOperatingRevenue
us-gaap:CapitalizedContractCost
lumn:CapitalizedContractCostIncurred
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:SubsequentEventType
lumn:DisposalGroupIncludingDiscontinuedOperationTransactionExpenses

lumn:GainLossOnExtinguishmentOfDebtOperatingActivities

lumn:IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

lumn:OperatingExpensesExcludingDepreciationAmortizationAndImpairment
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

lumn:OperatingLeaseLeaseIncomePercentOfOperatingRevenue
us-gaap:StatementEquityComponents
us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:CapitalizedContractCost
us-gaap:CapitalizedContractCostAmortization
us-gaap:DerivativeInstrumentRisk
us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ConcentrationRiskPercentage1

us-gaap:ContractWithCustomerLiabilityRevenueRecognized
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DepreciationAndAmortization
us-gaap:ConsolidationItems

us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:ExtinguishmentOfDebt
us-gaap:ExtinguishmentOfDebtAmount
dei:LegalEntity, us-gaap:LongtermDebtType

us-gaap:FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation
us-gaap:StatementBusinessSegments

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery
us-gaap:StatementBusinessSegments

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs
us-gaap:StatementBusinessSegments

us-gaap:GoodwillForeignCurrencyTranslationGainLoss
us-gaap:StatementBusinessSegments

us-gaap:GoodwillImpairmentLoss

us-gaap:IncreaseDecreaseInAccruedTaxesPayable

us-gaap:IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet

us-gaap:IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet

us-gaap:IncreaseDecreaseInPensionAndPostretirementObligations

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestPaidCapitalized
us-gaap:LitigationCase, us-gaap:LitigationStatus
us-gaap:LitigationSettlementAmountAwardedToOtherParty
us-gaap:LitigationCase, us-gaap:StatutoryAccountingPracticesByJurisdiction
us-gaap:StatutoryAccountingPracticesByJurisdiction
dei:LegalEntity
us-gaap:LossContingencyDamagesSoughtValue

us-gaap:LossContingencyNumberOfPlaintiffs
us-gaap:StatutoryAccountingPracticesByJurisdiction

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OperatingLeaseLeaseIncome

us-gaap:OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax
us-gaap:ConsolidationItems
us-gaap:OtherCostAndExpenseOperating
us-gaap:ConsolidationItems
us-gaap:OtherNonoperatingIncome

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:PaymentsForProceedsFromOtherInvestingActivities
us-gaap:RestructuringCostAndReserve
us-gaap:PaymentsForRestructuring
dei:LegalEntity, us-gaap:LineOfCreditFacility, us-gaap:LongtermDebtType
us-gaap:ProceedsFromIssuanceOfDebt
dei:LegalEntity, us-gaap:LineOfCreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForLoanLossesExpensed
us-gaap:StatementBusinessSegments

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:RepaymentsOfDebt
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:ExtinguishmentOfDebt
dei:LegalEntity, us-gaap:ExtinguishmentOfDebt
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCharges

us-gaap:RevenueNotFromContractWithCustomer
us-gaap:ConsolidationItems, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueOther
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross
us-gaap:StatementEquityComponents
us-gaap:StockholdersEquityOther

us-gaap:WeightedAverageNumberOfSharesIssuedBasic

us-gaap:WeightedAverageNumberOfSharesRestrictedStock

ctl:CostOfDebtAfterTaxPercentage
us-gaap:ReportingUnit

ctl:CostOfEquityPercentage
us-gaap:ReportingUnit
us-gaap:RetirementPlanType
ctl:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeDeferredIncomeTaxBenefitExpense
us-gaap:RetirementPlanType
ctl:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossCurtailmentGainLossBeforeTax

ctl:DefinedBenefitPlanExpectedFutureBenefitPaymentNextTwelveMonthsNetofDirectSubsidies
us-gaap:Range, us-gaap:RetirementPlanType
ctl:DefinedBenefitPlanHealthCareCostTrendRate

ctl:FinanceLeaseAndOtherObligations

ctl:GoodwillControlPremiumPercent
us-gaap:Range, us-gaap:MeasurementInputType
ctl:GoodwillImpairmentMeasurementInput
us-gaap:ReportingUnit
ctl:GoodwillImpairmentPercent

ctl:IntangibleAssetsGrossIncludingGoodwill

ctl:IntangibleAssetsNetIncludingGoodwillAndOtherAssetsNoncurrent

ctl:LeaseLiability

ctl:LeaseRightofUseAsset

ctl:LongTermDebtMaturityYearFiveAndThereafter

ctl:NumberOfGlobalEnterpriseCustomers

ctl:NumberofGlobalEnterpriseCustomers
us-gaap:IncomeTaxAuthority
ctl:OperatingLossCarryforwardGross
us-gaap:IncomeTaxAuthority, us-gaap:TaxPeriod

ctl:SharesofEntityCommonStockAssetsofEntitysDefinedContributionPlan

ctl:WeightedAverageCostOfCapitalPercentage
us-gaap:ReportingUnit

lumn:FinanceLeaseAndOtherObligations

lumn:IntangibleAssetsGrossIncludingGoodwill

lumn:IntangibleAssetsNetIncludingGoodwillAndOtherAssetsNoncurrent

lumn:LongTermDebtMaturityYearFiveAndThereafter

us-gaap:AccountsReceivableGross

us-gaap:AccountsReceivableGrossCurrent
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsNotesLoansAndFinancingReceivablesByBillingStatusType

us-gaap:AccountsReceivableNet

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
us-gaap:RetirementPlanType

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetRetirementObligation
us-gaap:CapitalizedContractCost
us-gaap:CapitalizedContractCostNet
us-gaap:CapitalizedContractCost
us-gaap:CapitalizedContractCostNetCurrent

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerAssetNetCurrent

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerReceivableAllowanceForCreditLoss

us-gaap:DebtInstrumentCarryingAmount
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:ExtinguishmentOfDebt, us-gaap:SubsequentEventType
us-gaap:DebtInstrumentRepurchasedFaceAmount
us-gaap:ExtinguishmentOfDebt, us-gaap:SubsequentEventType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

us-gaap:DeferredCreditsAndOtherLiabilitiesNoncurrent

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
us-gaap:ChangeInAccountingEstimateByType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
dei:LegalEntity, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:Range
us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear
us-gaap:Range, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1
us-gaap:RetirementPlanType
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:RetirementPlanType
us-gaap:DerivativeNotionalAmount
dei:LegalEntity, us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:SubsequentEventType
us-gaap:DisposalGroupIncludingDiscontinuedOperationConsideration
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:SubsequentEventType

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinancingReceivableAllowanceForCreditLosses
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:StatementBusinessSegments
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:ChangeInAccountingEstimateByType, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:GoodwillImpairedAccumulatedImpairmentLoss

us-gaap:IncomeTaxesReceivable

us-gaap:InterestPayableCurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LettersOfCreditOutstandingAmount
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:SubsequentEventType
us-gaap:LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:FairValueByMeasurementFrequency
us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtWeightedAverageInterestRate
dei:LegalEntity, us-gaap:LongtermDebtType

us-gaap:LossContingencyEstimateOfPossibleLoss
us-gaap:LitigationCase, us-gaap:LitigationStatus
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:LitigationCase, us-gaap:LitigationStatus
us-gaap:LossContingencyRangeOfPossibleLossPortionNotAccrued
us-gaap:LitigationCase, us-gaap:Range, us-gaap:LitigationStatus

us-gaap:MaterialsSuppliesAndOther

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:OtherAssetsMiscellaneousCurrent
us-gaap:OtherCommitments
us-gaap:OtherCommitment
us-gaap:OtherCommitments
us-gaap:OtherCommitmentDueAfterFifthYear
us-gaap:OtherCommitments
us-gaap:OtherCommitmentDueInFifthYear
us-gaap:OtherCommitments
us-gaap:OtherCommitmentDueInFourthYear
us-gaap:OtherCommitments
us-gaap:OtherCommitmentDueInNextTwelveMonths
us-gaap:OtherCommitments
us-gaap:OtherCommitmentDueInSecondYear
us-gaap:OtherCommitments
us-gaap:OtherCommitmentDueInThirdYear

us-gaap:OtherDeferredCostsNet

us-gaap:OtherIntangibleAssetsNet

us-gaap:OtherReceivablesGrossCurrent
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities

us-gaap:PreferredStockSharesOutstanding

us-gaap:PrepaidExpenseCurrent

us-gaap:PrescriptionDrugSubsidyReceiptsAfterYearFive

us-gaap:PrescriptionDrugSubsidyReceiptsNextTwelveMonths

us-gaap:PrescriptionDrugSubsidyReceiptsYearFive1

us-gaap:PrescriptionDrugSubsidyReceiptsYearFour1

us-gaap:PrescriptionDrugSubsidyReceiptsYearThree1

us-gaap:PrescriptionDrugSubsidyReceiptsYearTwo1

us-gaap:PurchaseCommitmentRemainingMinimumAmountCommitted

us-gaap:PurchaseObligationDueAfterFifthYear

us-gaap:PurchaseObligationDueInFourthAndFifthYear

us-gaap:PurchaseObligationDueInNextTwelveMonths

us-gaap:PurchaseObligationDueInSecondAndThirdYear

us-gaap:RestrictedCashCurrent

us-gaap:RestrictedCashNoncurrent
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringReserve

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:RevenueRemainingPerformanceObligationPercentage
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Other Nonoperating Income Expense
Balance Sheet
Cash And Cash Equivalents At Carrying Value
Assets
Cash And Cash Equivalents At Carrying Value
Current Assets
Other Assets Current
NonCurrent Assets
Deferred Income Tax Assets Net
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Current Liabilities
Other Liabilities Current
Noncurrent Liabilities
Operating Lease Liability Noncurrent
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Accounts Payable
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
OperatingLeaseLiability
Operating Lease Liability Current
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ███████████████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▄▄▄▄▄▄▄▄▄▁▁1105.01106.01097.01097.01097.01098.01090.01090.01090.01090.01080.01081.01079.01079.01069.0550.0550.0549.0547.0547.0546.0546.0544.0554.0563.0566.0569.0571.0571.0575.0584.0593.0604.0616.0626.0623.0622.0621.0619.0617.0602.0305.778304.948NANANA
us-gaap:CommonStockSharesIssued ███████████████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▄▄▄▄▄▄▄▄▄▁▁1105.1861105.5331096.9211097.2371097.1141097.7111090.0581090.3261090.1371090.4451080.1671080.5731078.7051078.6321069.169549.654549.743548.845546.545546.69545.924546.164543.8554.09562.999565.53568.517570.678571.344575.113583.637593.497604.209615.564625.658623.144622.327621.276618.514617.427601.906305.778317304.947538NANANA
us-gaap:PreferredStockSharesIssued ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██████0.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0070.0090.0090.0090.0090.0090.009NA0.009NANANA
us-gaap:CommonStockSharesOutstanding ███████████████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▄▄▄▄▄▄▄▄▄▁▁1105.1861105.5331096.9211097.2371097.1141097.7111090.0581090.3261090.1371090.4451080.1671080.5731078.7051078.6321069.169549.654549.743548.845546.545546.69545.924546.164543.8554.09562.999565.53568.517570.678571.344575.113583.637593.497604.209615.564625.658623.144622.327621.276618.514617.427601.906305.778317304.947538NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁1093.4021091.586NA1085.6661082.5671081.754NA1074.791072.8131068.878NA1072.3511068.8191069.183NA541.963542.151541.522NA540.917540.375540.187NA555.156559.22563.505NA567.432569.032575.456NA594.587605.602621.074NA623.296621.839620.35NA613.686600.2590.304479NA301.386300.6050.299997
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁1086.4531082.474NA1080.5051079.4751075.459NA1072.5431071.3411068.878NA1066.9041064.7111065.796NA541.521541.361540.458NA539.806539.627538.799NA554.897558.64561.969NA565.965567.915574.535NA594.587604.302619.423NA621.148619.887618.208NA612.277598.8840.303832NA300.702300.0580.299413
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount █▁2.21.0NA0.48.72.7NA5.2NANANANANANANANANANANANA4.1NANANA2.4NANANANANANA1.16NANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic ▇▇▅▇▇▇▇▇▇▁▄▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▅▇▇▇▇▇▇▇▇▇▇▇███0.470.44-2.120.340.350.290.210.280.35-5.77-2.260.250.270.111.260.170.030.30.080.280.360.440.620.370.260.340.330.330.340.350.41-1.760.450.480.370.430.120.320.180.230.170.690.740.760.790.84
us-gaap:EarningsPerShareDiluted ▇▇▅▇▇▇▇▇▇▁▄▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▅▇▇▇▇▇▇▇▇▇▇▇███0.460.44-2.120.340.350.290.210.280.35-5.77-2.260.250.270.111.260.170.030.30.080.280.360.440.620.370.260.340.330.330.340.350.41-1.760.440.480.370.430.120.320.180.230.170.690.740.760.790.84
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 COGS Ratio us-gaap:ConsolidationItems us-gaap:OperatingSegments▁▂▂▂▂▃▄▄▄▅█▅▅▅4924.05029.05125.05167.05192.05228.05570.05606.05578.05647.06324.05640.05717.05762.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctl:ConsumerNANA1299.01309.01316.01327.01386.01398.01417.01441.01285.01355.01352.01379.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctl:EnterpriseNANA1430.01439.01433.01420.01555.01550.01505.01523.01558.01505.01523.01547.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctl:InternationalandGlobalAccountsNANA856.0835.0849.0865.0904.0899.0902.0891.0923.0892.0903.0935.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctl:SmallandMediumBusinessNANA618.0635.0646.0658.0731.0734.0736.0755.0756.0785.0819.0784.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctl:WholesaleNANA922.0949.0948.0958.0994.01025.01018.01037.01074.01097.01116.01110.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,lumn:BusinessSegment▁█3522.03595.0NANA3717.03737.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,lumn:MassMarketSegment▁█1402.01434.0NANA1475.01491.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio us-gaap:ConsolidationItems us-gaap:OperatingSegments▁▂▂▂▂▃▄▄▄▅█▅▅▅4924.05029.05125.05167.05192.05228.05570.05606.05578.05647.06324.05640.05717.05762.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctl:ConsumerNANA1299.01309.01316.01327.01386.01398.01417.01441.01285.01355.01352.01379.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctl:EnterpriseNANA1430.01439.01433.01420.01555.01550.01505.01523.01558.01505.01523.01547.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctl:InternationalandGlobalAccountsNANA856.0835.0849.0865.0904.0899.0902.0891.0923.0892.0903.0935.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctl:SmallandMediumBusinessNANA618.0635.0646.0658.0731.0734.0736.0755.0756.0785.0819.0784.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctl:WholesaleNANA922.0949.0948.0958.0994.01025.01018.01037.01074.01097.01116.01110.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,lumn:BusinessSegment▁█3522.03595.0NANA3717.03737.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 SG&A Ratio us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,lumn:MassMarketSegment▁█1402.01434.0NANA1475.01491.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 TTM Greenblatt ROC _ _██▅██████▁▅███▇▇▇█▇███████▇████▆██████▇█▇▇▇1006.0987.0-1809.0888.0903.0980.0847.0950.0976.0-5499.0-1841.0894.0767.0750.0524.0487.0367.0631.0392.0595.0650.0694.0751.0656.0549.0649.0483.0619.0655.0653.0641.0-685.0715.0782.0666.0736.0657.0654.0533.0551.0459.0464.298486.0NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:ConsolidationItems us-gaap:MaterialReconcilingItems▄▁▆▃▁█▅▄42.020.055.031.020.069.048.038.0NA33.0NANANA41.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax █▇▅▇▇▇▇▇▇▁▅▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▆▇▇▇█▆▇▇▆▇▇▇▆▇▇▇▇▇641.0443.0-2307.0473.0430.039.042.0222.0381.0-6133.0-2419.0308.090.0229.01116.0148.053.0194.0-220.0178.0222.0263.0345.0223.0185.0208.0-1040.0178.0209.0210.01097.0-1018.0276.0304.0-484.0284.076.0212.0-747.0123.0113.0213.0173.0234.0NANA
us-gaap:CostOfGoodsAndServicesSold ▆▆▆▆▆▆▇▇▇▇████▇▅▅▅▅▆▅▅▅▆▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▁▁▁▁▁2115.02136.02231.02236.02232.02235.02521.02590.02446.02520.02657.02672.02730.02803.02498.01927.01890.01888.01929.01996.01949.01900.01915.01993.01959.01911.01974.01975.01962.01935.01920.01918.01873.01796.01907.01943.01912.01877.01968.01950.01781.0594.455498.048641.0627.0619.105
us-gaap:CostsAndExpenses ▁▁▄▁▁▁▂▁▁█3918.04042.06934.04279.04289.04248.05402.04400.04399.010926.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GainsLossesOnExtinguishmentOfDebt ▁█0.08.0NANANANANANANANANA-33.0NANA0.00.0NANA0.0-27.0NANA0.0NANANANANANANA10.00.0NANA15.00.0-202.0NA-7.00.0-1.0NANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:LongtermDebtType us-gaap:SeniorNotesNANA-27.04.0-165.079.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ██▅██████▁▅███▇▇▇█▇███████▇████▆674.0632.0-2208.0480.0513.0433.0349.0410.0502.0-6027.0-2365.0329.0237.0236.054.0139.040.0307.074.0249.0317.0380.0430.0329.0234.0323.0157.0299.0323.0331.0330.0-1005.0NANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ██▇▇███▇██▇▇▇█▁▇▇█▇▇██▇█▇█▇▇██▇▇████▇█▇▇▇█████168.0157.081.0114.0136.0119.0126.0108.0131.0138.047.057.0-55.0121.0-1063.047.023.0144.032.097.0121.0144.092.0124.091.0131.0-31.0111.0130.0128.091.040.0125.0207.0141.0152.049.0131.082.094.063.0127.742133.951140.0149.0160.548
us-gaap:IncomeTaxesPaidNet ▅▅▅▄▅▅▅▄▅▅▅▁▂▅▅▆▇▅▅█▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▆▅▅▃▂▅52.021.023.0-71.014.06.020.0-76.015.07.00.0-382.0-294.02.014.0118.0265.0-5.053.0323.010.011.09.013.036.05.06.0-2.013.010.03.0-1.038.08.023.028.032.0-1.018.01.094.3024.698-26.0-150.0-250.8392.839
us-gaap:InterestExpense ▅▅▅▆▆▆▇▇▇▇████▇▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▁▁▁▁▁384.0389.0396.0409.0414.0449.0484.0496.0518.0523.0539.0557.0546.0535.0481.0362.0320.0318.0320.0327.0340.0331.0328.0329.0327.0328.0330.0325.0325.0331.0328.0329.0325.0316.0315.0326.0335.0343.0340.0324.0280.0131.545141.478138.0140.0142.225
us-gaap:InterestPaidNet ▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▅▄▅▄▅▄▅▄▅▄▅▄▅▄▅▄▅▄▅▄▇▂▅█▁▃▄▆▂▃357.0387.0373.0426.0445.0383.0522.0456.0570.0480.0567.0510.0570.0491.0484.0293.0369.0255.0379.0262.0398.0262.0396.0260.0384.0270.0404.0262.0407.0265.0418.0268.0382.0265.0408.0268.0973.0-244.0465.01220.0-530.07470.074203.4611.0-331.72765.727
us-gaap:NetIncomeLoss ▇▇▅▇▇▇▇▇▇▁▅▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▇▇▇▇▇▇▇▇▇▇▇▇▇▇506.0475.0-2289.0366.0377.0314.0223.0302.0371.0-6165.0-2412.0272.0292.0115.01117.092.017.0163.042.0152.0196.0236.0338.0205.0143.0192.0188.0188.0193.0203.0239.0-1045.0269.0298.0233.0270.074.0200.0109.0140.0102.0211.095225.0232.0238.0252.601
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ██▁███▇▇506.0475.0-2289.0366.0377.0314.0223.0302.0NANANANANANANANANANANANANA236.0338.0205.0143.0192.0188.0188.0193.0203.0239.0-1045.0269.0298.0233.0270.073.0200.0107.0140.0102.0209.0219.168232.0238.0NA
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted ██▁███▇▇506.0475.0-2289.0366.0377.0314.0223.0302.0NANANANANANANANANANANANANA236.0338.0205.0143.0192.0188.0188.0193.0203.0239.0-1045.0269.0298.0233.0270.073.0200.0107.0140.0102.0209.0219.18232.0238.0NA
us-gaap:NonoperatingIncomeExpense ▅▄▄▃▄▁▂▁▂▂▂▁▂▂▃▄▅▅▅▄▅▅▅▅▅▅▅▅▅▅▅▅▅▆▅▅▁▅▅▅▅█████-332.0-355.0-399.0-408.0-390.0-547.0-498.0-540.0-474.0-528.0-524.0-565.0-530.0-514.0-470.0-348.0-327.0-324.0-318.0-346.0-333.0-314.0-321.0-327.0-315.0-326.0-326.0-320.0-332.0-322.0-311.0-320.0-321.0-277.0-292.0-314.0-534.0-323.0-341.0-317.0-294.0-125.065-125.859-134.0-136.0-131.725
 us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidationItems us-gaap:MaterialReconcilingItems▇▇▆▅▆▁▃▂▄▂▂▁▂▂▄▇███▇▇███████▇███-332.0-355.0-399.0-408.0-390.0-547.0-498.0-540.0-474.0-528.0-524.0-565.0-530.0-514.0-470.0-348.0-327.0-324.0-318.0-346.0-333.0-314.0-321.0-327.0-315.0-326.0-326.0-320.0-332.0-322.0-311.0-320.0NANANANANANANANANANANANANANA
us-gaap:OperatingIncomeLoss ██▅██████▁▅███▇▇▇█▇███████▇████▆██████▇█▇▇▇▇▇█1006.0987.0-1809.0888.0903.0980.0847.0950.0976.0-5499.0-1841.0894.0767.0750.0524.0487.0367.0631.0392.0595.0650.0694.0751.0656.0549.0649.0483.0619.0655.0653.0641.0-685.0715.0782.0666.0736.0657.0654.0533.0551.0459.0464.298486.0506.0523.0545.23
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▇▄█▆▆▁█▃▅▅▅▅▁▇▆▆▅▅▅▅▅▅▅▅▆▅▅▅80.0-86.0144.049.09.0-239.0117.0-112.0-8.05.0-40.0-1.0-239.079.011.018.04.0-2.0-12.0-4.0-4.0-1.0-4.0-10.011.0-11.0-7.0-16.0NANANANANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense █▇▅▆▇▁▅▄█▅▅▇▆▇▆▆▅▅▆▅▆▆▆▆▆▆▆▆▅▆▆▆▆▇▆▆▆▇▆▆▅▆▆▆▆▆52.034.0-3.01.024.0-98.0-14.0-44.044.0-5.0-19.025.016.021.011.014.0-7.0-6.02.0-19.07.017.07.02.012.02.04.05.0-7.09.07.09.04.039.08.012.03.020.0-1.07.0-14.06.4815.6194.04.010.5
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▆▆▆▆▆▆█▇▇▇████▇▅▅▅▅▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▁▁▁▁▁4453.04555.04653.04686.04711.04747.05570.05251.05222.05289.05778.05506.05577.05633.05323.04034.04090.04209.04289.04382.04398.04401.04476.04554.04419.04451.04438.04514.04541.04538.04542.04515.04525.04513.04583.04571.04612.04610.04653.04596.04406.01695.7191722.01748.01772.01800.426
us-gaap:Revenues ▆▆▇▇▇▇▇▇▇█████▇▅▅▅▅▅▅▅▆▆▅▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▁▁▁▁▁4924.05029.05125.05167.05192.05228.05570.05606.05578.05647.05778.05818.05902.05945.05323.04034.04090.04209.04289.04382.04398.04401.04476.04554.04419.04451.04438.04514.04541.04538.04542.04515.04525.04513.04583.04571.04612.04610.04653.04596.04406.01695.7191722.01748.01772.01800.426
us-gaap:SellingGeneralAndAdministrativeExpense ▅▅▆▆▆▆▇▆▇▇▇▇███▅▆▆▇▅▆▆▅▆▆▆▆▆▆▆▆▇▆▆▅▅▆▆▆▆▇▁▂▁▁▁762.0756.0866.0850.0895.0853.0992.0831.0960.0932.0974.0967.01115.01109.01104.0710.0884.0810.01010.0796.0812.0831.0757.0857.0863.0851.0850.0823.0831.0843.0823.01047.0814.0818.0790.0748.0835.0871.0900.0870.0968.0268.419372.989243.0264.0282.929
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ▆▆▆▆▇▆▇▇▇▇▇████▅▅▄▄▄▄▄▄▄▅▅▅▅▅▅▅▅▅▅▅▅▅▆▅▆▅▁▁58947.058828.059394.062599.064171.064056.064742.064728.064508.064788.070256.073371.074346.074793.075611.050536.050925.046602.047017.046796.047118.047517.047604.048754.048977.049520.050147.050646.050614.051166.051787.051984.053254.053729.054020.054632.055090.056842.056139.056735.054842.021901.45822038.098NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▆▆▆▆▇▆▇▇▇▇▇████▅▅▄▄▄▄▄▄▄▅▅▅▅▅▅▅▅▅▅▅▅▅▆▅▆▅▁▁58947.058828.059394.062599.064171.064056.064742.064728.064508.064788.070256.073371.074346.074793.075611.050536.050925.046602.047017.046796.047118.047517.047604.048754.048977.049520.050147.050646.050614.051166.051787.051984.053254.053729.054020.054632.055090.056842.056139.056735.054842.021901.45822038.098NANANA
us-gaap:StockholdersEquity ▂▂▂▃▃▃▃▃▃▃▆████▃▃▃▃▃▃▃▃▃▄▄▄▄▅▅▅▅▅▆▆▆▆▇▇▇▇▁▁▁11706.011303.011162.013689.013462.013291.013470.013674.013692.013543.019828.022803.022989.023443.023491.012960.013086.013306.013399.013892.013985.014036.014060.014250.014587.014765.015023.016445.016598.016798.017191.016714.018400.018856.019289.020197.020311.020638.020827.021976.021654.09658.09647.09606.0NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▆▅▅▅▇▇▇▇▆▆▆▆▇▆▆▄▄██▄▄▄▄▅▅▅▅▆▅▆▆▆▅▆▅▆▆█▅▆█▁▁3746.03293.03176.03504.04858.04690.04768.04589.03878.03820.03820.04114.04451.04183.04194.02694.02908.04968.05162.02728.02791.02926.02650.03350.03305.03468.03576.04018.03598.03748.03907.03812.03648.03875.03613.03833.03847.04882.03523.03808.05007.01140.7361143.129NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▃▂▂▂▆▅▆▅▂▂▂▂▃▂▂▁▂▁▁▁▁▂▁▂▁▁▁▃▁▁▁▁▁▂▁▁▁▅▁▄█▁▁▁▁▁935.0486.0406.0526.01763.01564.01690.01404.0410.0441.0488.0390.0700.0501.0551.0160.0342.0214.0222.0140.0191.0438.0126.0355.0155.0155.0128.0734.0181.0219.0168.0266.0214.0476.0211.0194.0281.01530.0128.01123.02546.0269.659172.943243.0186.0206.49
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▂▁▁▁▃▃▃▂▁▁▁▁▂▁▂██▁▁▁▁946.0503.0427.0547.01784.01591.01717.01431.0440.0474.0518.0420.0732.0537.0587.06164.06357.0216.0224.0142.0193.0NA128.0NANANA129.0NANANANANANANANANANANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent ▆▆▆▆▇▇▇▇█▇▇████▆▅▅▆▆▆▅▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▆▆▅▁▁1905.01883.01962.02143.02182.02175.02259.02290.02446.02347.02398.02465.02471.02432.02557.01888.01868.01854.02017.01957.01972.01871.01943.01951.01955.01973.01988.01978.01986.01887.01977.01911.01900.01924.01917.01971.01920.01879.01952.01998.01830.0667.842712.814NANANA
us-gaap:OtherAssetsCurrent ▆▆▅▆▆▆▅▆▇▇▆██▇▆▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▁▁906.0924.0808.0835.0913.0941.0808.0884.01011.01026.0918.01237.01260.01105.0941.0639.0691.0557.0547.0631.0628.0617.0581.0594.0599.0622.0580.0591.0628.0632.0597.0563.0570.0587.0552.0649.0628.0481.0390.0378.0348.057.13740.849NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:PropertyPlantAndEquipmentGross NANA57934.0NANANA55425.0NANANA53267.0NANANA51204.041352.040744.039642.039194.040304.039763.039229.038785.038250.037642.037100.036718.035970.035404.034847.034307.033724.033204.032571.032086.031288.030623.030188.029577.028606.026595.016516.98516329.244NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType ctl:CentralOfficeAndOtherNetworkElectronicsNANA20692.0NANANA19608.0NANANA18736.0NANANA18538.0NANANA13768.0NANANA14144.0NANANA13248.0NANANA12178.0NANANA11395.0NANANA9730.0NANANA5412.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType ctl:FiberConduitAndOtherOutsidePlantNANA26522.0NANANA24666.0NANANA23936.0NANANA22798.0NANANA16996.0NANANA16166.0NANANA15151.0NANANA14187.0NANANA13030.0NANANA12423.0NANANA8382.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType ctl:SupportAssetsNANA8261.0NANANA7984.0NANANA8020.0NANANA7586.0NANANA6623.0NANANA7000.0NANANA6578.0NANANA6420.0NANANA6235.0NANANA6098.0NANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ConstructionInProgressNANA1611.0NANANA2300.0NANANA1704.0NANANA1399.0NANANA1244.0NANANA904.0NANANA1166.0NANANA937.0NANANA847.0NANANA744.0NANANA272.0NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNANA848.0NANANA867.0NANANA871.0NANANA883.0NANANA563.0NANANA571.0NANANA575.0NANANA585.0NANANA579.0NANANA590.0NANANA206.0NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ███▇▇▇▇▇▇▆▆▆▆▆▆▅▅▅▅▅▅▅▅▄▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▁▁▁▁32917.032214.031596.030921.030332.029814.029346.028760.028097.027385.026859.026493.025872.025116.024352.023718.023161.022626.022155.022464.021869.021266.020716.020182.019553.018917.018285.017647.016969.016354.015661.015059.014427.013746.013054.012275.011569.010893.010141.09316.08571.07868.4057574.768NANANA
us-gaap:AmortizationOfIntangibleAssets ▂▆▅▆▆▆▅▆▆▆█▆▆▆▅▁▁318.0425.0400.0443.0440.0431.0400.0438.0440.0429.0500.0446.0447.0444.0406.0269.0276.0NANANANANANANANANANANANANANANANANA414.0409.0NANA458.0459.0NANANANANANA
us-gaap:PropertyPlantAndEquipmentNet ███████████████▄▄▄▄▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▁▁25993.026091.026338.026290.026079.025956.026079.025874.025860.025793.026408.026168.026494.026826.026852.017634.017583.017016.017039.017840.017894.017963.018069.018068.018089.018183.018433.018323.018435.018493.018646.018665.018777.018825.019032.019013.019054.019295.019436.019290.018024.08648.588754.476NANANA
us-gaap:Goodwill ▄▄▄▅▅▅▅▅▅▅▇████▄▄▄▄▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▄▁▁18867.018854.018870.021476.021469.021473.021534.021507.021527.021526.028031.030770.030715.030778.030475.019638.019639.019650.019650.020766.020766.020743.020742.020757.020758.020753.020755.020664.020674.020674.020674.020637.021744.021733.021732.021732.021732.021726.021724.021702.020266.010260.6410260.64NANANA
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill ▁▁███████████9.09.0278.0278.0269.0269.0269.0269.0269.0269.0269.0269.0269.0NA269.0NANANA269.0NANANA269.0NANANA268.0NANANA321.0NANANA268.0268.0268.0422.0418.0545.0418.0268.5268.5NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill 7663.0NA8219.0NANANA9567.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass ctl:TradeNamesandPatentsNANANA85.088.095.0103.0109.0117.0124.0131.0138.0146.0NA159.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass lumn:TradeNamesPatentsAndOther██▁317.0331.077.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:ComputerSoftwareIntangibleAsset▂▃▄▆██▇▇▆▅▂▁▁1481.01509.01520.01567.01612.01617.01599.01599.01576.01536.01468.01450.01454.0NA1469.0NANANA1227.0NANANA1248.0NANANA1338.0NANANA1415.0NANANA1399.01447.01493.0NA1622.0NANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelationships▄▄▄▅▅▅▅▆▆▆▆▇▇▇█▁▁▁▁▂▂▂▂▃5856.06035.06344.06633.06934.07245.07596.07902.08245.08580.08911.09309.09667.010058.010876.02214.02401.02596.02797.03254.03472.03698.03928.04162.0NANA4893.0NANANA5935.0NANANA7052.07341.07635.0NA8239.0NANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:TradeNamesNANA77.0NANANA103.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset NANA1699.0NANA1667.01686.01721.01844.01952.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▇████▂▂▃▃▃▃▂▂▂▃▁▂▂▂▁▁▁▁▂▂▂▂▂▂▂▂▂▂▁▁▂▂2678.02706.02791.02766.02862.01020.01084.01134.01165.01158.01192.01126.01123.01047.01286.0813.0823.0838.0838.0690.0689.0662.0660.0849.0840.0856.0843.0831.0829.0834.0823.0822.0841.0800.0796.0854.0900.0NA869.0NANANA639.776NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AccountsPayableCurrent ▄▄▅▆▆▆▇▇▇▆█▆▆▆▆▄▄▄▅▄▄▄▄▄▄▄▅▄▅▅▄▅▅▄▅▅▅▄▆▆▅▁▁966.01017.01134.01364.01448.01581.01724.01712.01634.01481.01933.01387.01360.01508.01555.0939.0944.0994.01179.01036.01067.01039.0968.01087.01049.01068.01226.01069.01153.01183.01111.01158.01285.01094.01207.01320.01134.01026.01399.01360.01256.0298.687299.619NANANA
us-gaap:ContractWithCustomerLiabilityCurrent ▁▂▁▁▂▂▃▃▄▄▄█▁748.0758.0753.0738.0759.0788.0804.0798.0852.0841.0832.0983.0750.0NA892.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ▇█▇▆█▆▇▇▇▆▆▅▅▅▅▃▃▅▅▅▅▄▅▆▅▄▄▅▅▅▅▄▄▅▅▅▅▆▄▅▅▁▁6510.07787.06634.05879.07472.05703.07258.06589.06495.05373.05531.05286.04521.04767.04857.03266.03243.05096.05349.04733.04842.03826.04604.05547.04797.03579.03918.04577.04443.04621.04409.03978.03748.04583.04595.04931.05207.05643.04019.04737.05064.01073.0071011.042NANANA
us-gaap:OperatingLeaseLiabilityCurrent ▂▂▁▂▇▃▃▄█389.0387.0379.0401.0474.0416.0416.0419.0488.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ▄▄▅▅▅▅▆▅▅▄▅▆▅▇▅▃▃▂▃▄▄▄▃▄▃▄▃▃▃▄██▄▄▃▃▄▄▃▃▃▁▁286.0307.0328.0335.0349.0369.0386.0318.0337.0297.0357.0374.0358.0428.0344.0216.0238.0177.0213.0255.0272.0302.0220.0268.0225.0259.0210.0224.0208.0255.0514.0498.0259.0274.0234.0254.0269.0279.0250.0252.0234.0109.706121.828NANANA
us-gaap:TaxesPayableCurrent ▁▃▂▄▂▃▂▄▃▄▂▄▃▄▃▃▁▆▁▂▇▆▂█▅▅▂▃▂▄▂294.0346.0314.0378.0337.0354.0311.0388.0374.0386.0337.0409.0344.0390.0370.0357.0290.0460.0301.0330.0505.0458.0318.0535.0423.0418.0309.0372.0342.0410.0339.0NANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LongTermDebt ▁█31500.031769.0NA32927.0NANANANA35072.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA7327.587NANANA
us-gaap:DebtAndCapitalLeaseObligations ▅▆▆▆▇▇▇▇▇▇▇████▃▃▁▁▁▁▁▁▁▁▁▁▂▂▂▂▁▁▁▁31169.031440.031837.032592.034299.034610.034694.035125.034788.035490.036061.036527.037315.037377.037726.024978.025077.019976.019993.019718.019616.020025.020225.020414.020353.020456.020671.021151.020959.020940.020966.020582.020585.020788.020605.0NANANA21836.0NA21344.0NA7328.0NANANA
us-gaap:LongTermDebtAndCapitalLeaseObligations ▅▄▅▆▆▇▆▇▇▇▇▇███▃▃▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▁▁▂▂▂▂▂28574.027599.029410.031105.031414.033481.032394.033381.033193.034858.035409.035749.036878.036940.037283.024854.024881.018180.018185.018184.018165.019508.018722.018504.018834.020254.020121.019982.019771.019814.020181.020391.020283.019595.019400.019508.019682.020667.021356.021142.019734.0NA7316.004NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet █▇▆▅▅▄▄▄▃▂▁▁3643.03471.03342.03232.03094.02957.02918.02910.02826.02701.02527.02502.0NANA2413.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent ▃▃▄▃▃▄▄▂▃▃▃▃▅▆▆▆▆▇▇▆▇▇▇▇███▁▂▂▂4321.04435.04556.04345.04428.04516.04594.04140.04213.04265.04319.04392.04884.05085.05178.05183.05362.05448.05527.05228.05390.05445.05511.05534.05696.05755.05808.03761.03924.04012.04049.0NANANA5844.0NANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent █████▅▅▄▄▄▄▄▄▄▄▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁4193.04233.04290.04349.04301.02792.02766.02683.02622.02547.02642.02639.02667.02362.02389.01145.01123.01111.01086.01106.01111.01106.01138.01177.01229.01246.01247.01252.01268.01212.01204.0NANANA1248.0NANANANANANANA110.755NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent NANA1405.0NANA1316.01342.01351.01467.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA411.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA331.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA232.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA177.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA592.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ▂▂▂▃▃▃▃▃▃▃▆████▃▃▃▃▃▃▃▃▃▄▄▄▄▅▅▅▅▅▆▆▆▆▇▇▇▇▁▁▁11706.011303.011162.013689.013462.013291.013470.013674.013692.013543.019828.022803.022989.023443.023491.012960.013086.013306.013399.013892.013985.014036.014060.014250.014587.014765.015023.016445.016598.016798.017191.016714.018400.018856.019289.020197.020311.020638.020827.021976.021654.09658.09647.09606.0NANA
us-gaap:CommonStockValue ███████████████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▄▄▄▄▄▄▄▄▄▁▁1105.01106.01097.01097.01097.01098.01090.01090.01090.01090.01080.01081.01079.01079.01069.0550.0550.0549.0547.0547.0546.0546.0544.0554.0563.0566.0569.0571.0571.0575.0584.0593.0604.0616.0626.0623.0622.0621.0619.0617.0602.0305.778304.948NANANA
us-gaap:AdditionalPaidInCapital ▇▇▇▇▇▇▇▇███████▄▄▄▅▅▅▅▅▅▅▅▅▅▅▅▆▆▆▆▆▆▆▆▆▆▆▁▁20361.020598.020909.021130.021376.021634.021874.022101.022342.022575.022852.023399.023360.023316.023314.014370.014637.014733.014970.015121.015205.015184.015178.015460.015896.016059.016324.016532.016671.016874.017343.017954.018291.018691.019079.019052.018999.018950.018901.018854.018236.06194.0956174.741NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▂▁▁▂▂▂▂▂▁▁▅▆▇▇▇▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▇▇▇▇▇▇▇████-7050.0-7556.0-8031.0-5743.0-6109.0-6486.0-6814.0-7018.0-7321.0-7693.0-1643.0777.01040.01336.01103.034.0-51.0110.0-1.079.0115.0213.0272.0177.087.0141.0147.0131.0135.0144.066.0-173.01193.01244.01285.01506.01688.02067.02319.02663.02958.03291.7843302.469NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▂▁▁▁▁▁▂▂▂▂▂▂▂▃▃▃▃▃▃▄▄▄▄▄▃▃▃▆▆▆▆▄▄▄▄▆▆▆▆████-2710.0-2845.0-2813.0-2795.0-2902.0-2955.0-2680.0-2499.0-2419.0-2429.0-2461.0-2454.0-2490.0-2288.0-1995.0-1994.0-2050.0-2086.0-2117.0-1855.0-1881.0-1907.0-1934.0-1941.0-1959.0-2001.0-2017.0-789.0-779.0-795.0-802.0-1660.0-1688.0-1695.0-1701.0-984.0-998.0-1000.0-1012.0-158.0-141.0-138.957-141.153NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▄▅▆▆▂▇▇▅▁█▆▄▅▁1639.01525.01682.01794.01749.01299.01909.01888.01701.01182.01996.01787.01582.01667.01178.0NANANANANANANANANANANANANANANANANANANANANANANANANA1348.165669.835NANA419.537461.463
us-gaap:NetCashProvidedByUsedInInvestingActivities ██████████████▁-620.0-675.0-724.0-942.0-959.0-939.0-899.0-954.0-811.0-906.0-882.0-684.0-744.0-768.0-8021.0NANANANANANANANANANANANANANANANANANANANANANANANANA-153.838-208.162NANA-191.514-168.486
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▄▃▁▄▄▄▅▃▅▃▂▄▃█-576.0-774.0-1078.0-2089.0-597.0-486.0-724.057.0-924.0-320.0-1016.0-1415.0-643.0-949.01266.0NANANANANANANANANANANANANANANANANANANANANANANANANA1081.957-364.957NANA-248.706-248.294
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▅▄▄▄▄▄▅▅▄▄▄▄▄▄▁▄█▄▄▄443.076.0-120.0-1237.0193.0-126.0286.0991.0-34.0-44.098.0-312.0195.0-50.0-5577.0-193.06141.0-8.082.0-51.0NANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit ▇▇▆▇▇▇▇▇▇▇▆▇█▇▁▅▅▆▆▆▆▆█▆▆▆▆▇▇▇▆▆▇▇▇▇▆▇▇▇▇▆▇▆▆▆148.0131.051.095.0115.0105.090.0106.0118.0126.036.086.0277.0123.0-688.0-117.0-89.0-37.0-26.011.010.011.0257.040.016.037.0-10.093.0102.0106.042.042.0141.0166.0134.0123.022.0115.097.0132.0126.3439.66112.76836.0-1.631-15.369
us-gaap:DepreciationDepletionAndAmortization ▆▇▇▇▇▇▇█▇▇████▇▅▅▅▆▆▆▆▆▆▆▆▇▇▇▇▇▇▇▇▇▇▇▇█▇▇▁▁▁▁▁1041.01150.01195.01193.01162.01160.01210.01235.01196.01188.01262.01285.01290.01283.01197.0910.0949.0880.0958.0995.0987.0976.01053.01048.01048.01040.01131.01097.01093.01107.01166.01135.01123.01117.01220.01144.01208.01208.01255.01204.01198.453368.547364.553358.0357.838353.162
us-gaap:IncreaseDecreaseInAccountsPayable ▃▃▁▃▃▃▄▄▄▁█▅▂▄▄▅▄▃▅▄▄▅▃▅▄▃▅▃▄▆▃▃▆▄▃▇▅▂▄▄▄▄▄▄▄▃-88.0-93.0-218.0-98.0-112.0-115.04.01.0-27.0-239.0275.022.0-159.0-14.0-30.019.0-31.0-81.057.0-22.0-4.078.0-84.028.0-32.0-80.091.0-96.0-48.0123.0-76.0-123.0157.0-34.0-120.0188.058.0-198.0-44.010.0-23.068-0.9326.932-6.0-36.008-59.992
us-gaap:IncreaseDecreaseInAccountsReceivable ▆▄▁▅▆▃▅▂█▄▄▆▆▂▄▆▆▂▇▅█▄▆▅▅▅▆▅█▃▇▆▅▅▅▆▆▄▅▆▃▆▁▆▆▅41.0-45.0-149.032.062.0-60.0-2.0-125.0137.0-5.0-33.043.082.0-117.0-29.069.045.0-116.0108.033.0151.0-26.041.040.024.027.052.039.0132.0-60.0107.057.014.034.018.072.082.0-18.036.074.0-52.97144.971-158.22573.043.36814.632
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▄▅▆▆▂▇▇▅▁█▆▄▅▁1639.01525.01682.01794.01749.01299.01909.01888.01701.01182.01996.01787.01582.01667.01178.0NANANANANANANANANANANANANANANANANANANANANANANANANA1348.165669.835NANA419.537461.463
us-gaap:NetIncomeLoss ▇▇▅▇▇▇▇▇▇▁▅▇▇▇█▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▇▇▇▇▇▇▇▇▇▇▇▇▇▇506.0475.0-2289.0366.0377.0314.0223.0302.0371.0-6165.0-2412.0272.0292.0115.01117.092.017.0163.042.0152.0196.0236.0338.0205.0143.0192.0188.0188.0193.0203.0239.0-1045.0269.0298.0233.0270.074.0200.0109.0140.0102.0211.095225.0232.0238.0252.601
us-gaap:ShareBasedCompensation ▄▂▆▃▂█▅▄▅▃▄▅▆▄▅▂▂▂▂▂▂▁▁▁▂▁▁▂▂▁42.020.055.031.020.069.048.038.043.033.042.049.054.041.047.021.022.021.020.020.022.018.016.019.020.018.017.020.023.019.0NANANANANANANANANANANA9.388NANANA7.101
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ██████████████▁-620.0-675.0-724.0-942.0-959.0-939.0-899.0-954.0-811.0-906.0-882.0-684.0-744.0-768.0-8021.0NANANANANANANANANANANANANANANANANANANANANANANANANA-153.838-208.162NANA-191.514-168.486
us-gaap:PaymentsToAcquireProductiveAssets ▂▃▄██▇▇▇▄▇▆▂▄▄▃▃▅▄▇▃▂▁▅▄▂▁▇▃▃▂▅▄646.0716.0758.0988.01009.0974.0940.0957.0800.0931.0915.0684.0771.0805.0743.0753.0830.0780.0971.0746.0653.0611.0833.0767.0656.0616.0934.0712.0731.0670.0837.0801.0NANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▄▃▁▄▄▄▅▃▅▃▂▄▃█-576.0-774.0-1078.0-2089.0-597.0-486.0-724.057.0-924.0-320.0-1016.0-1415.0-643.0-949.01266.0NANANANANANANANANANANANANANANANANANANANANANANANANA1081.957-364.957NANA-248.706-248.294
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▂▂▂▂▂▂▄▂▁▁▁▁▁▁▃▁█▁▁▂▂▁▁▁▁▂▁▂▁▁▂▁▂▂▁▁▂▃▂▂990.0891.01104.0832.01188.01237.02719.0988.00.00.00.00.00.0130.01790.00.06608.00.00.0946.0988.0227.0-1.0396.00.0594.00.0483.00.00.0741.00.0752.0988.0-1.02.01329.02032.0943.0557.0NANANANANANA
us-gaap:RepaymentsOfLongTermDebt ▄▄▄█▄▇█▃▃▁▂▅▁▁▂▁▅▁▁▃▅▁▂▁▁▂▃▁▁▁▃▁▃▁1288.01176.0981.02638.01208.02488.02698.0699.0607.0153.0397.01416.055.068.0351.082.01499.031.026.0972.01439.025.0431.029.0120.0386.0638.041.074.047.0841.0151.0962.056.0NANANANANANANANANANANANA
us-gaap:PaymentsOfDividends ▂▂▂▂▂▂▂▂▂▂█████▂▂▃▂▂▃▂▂▃▃▃▃▃▃▃▃▃▃▃▆▆▆▆▆▅▅▁▁▁▁▁274.0294.0272.0275.0271.0291.0271.0275.0269.0285.0577.0579.0576.0580.0572.0291.0294.0296.0291.0290.0296.0290.0293.0296.0305.0304.0304.0308.0307.0309.0315.0325.0320.0341.0454.0452.0453.0452.0451.0448.0435.22221.78220.005221.0218.948218.052
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value110511061097109710971098109010901090109010801081107910791069550550549547547546546544554563566569571571575584593604616626623622621619617602305304299
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.91.91.81.81.71.71.71.71.71.71.51.51.51.41.41.11.11.21.21.21.21.11.11.11.11.11.11.11.11.11.11.11.11.11.21.11.11.11.11.11.11.41.41.3

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value110511051096109710971097109010901090109010801080107810781069549549548546546545546543554562565568570571575583593604615625623622621618617601305304299
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Preferred Stock Shares Issued

us-gaap:PreferredStockSharesIssued

us-gaap:PreferredStockSharesIssued


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value7000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.07000.09000.09000.09000.09000.09000.09000.09000.0
Percentage of PreferredStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value110511051096109710971097109010901090109010801080107810781069549549548546546545546543554562565568570571575583593604615625623622621618617601305304299100108
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value109310911085108210811074107210681072106810695415425415405405405555595635675695755946056216236216206136000.3044793013000.299997
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value108610821080107910751072107110681066106410655415415405395395385545585615655675745946046196216196186125980.3038323003000.299413
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302016-06-302015-06-302013-09-30
Value2.21.00.48.72.75.24.12.41.16
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.470.44-2.120.340.350.290.210.280.35-5.77-2.260.250.270.111.260.170.030.30.080.280.360.440.620.370.260.340.330.330.340.350.41-1.760.450.480.370.430.120.320.180.230.170.690.740.760.790.84
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.460.44-2.120.340.350.290.210.280.35-5.77-2.260.250.270.111.260.170.030.30.080.280.360.440.620.370.260.340.330.330.340.350.41-1.760.440.480.370.430.120.320.180.230.170.690.740.760.790.84
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:ConsolidationItems

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:MaterialReconcilingItems


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-03-31
Value42205531206948383341
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.40.00.70.41.50.90.70.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems0.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value641443-2307.04734303942222381-6133.0-2419.030890229111614853194-220.0178222263345223185208-1040.01782092101097-1018.0276304-484.028476212-747.0123113213173234
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.49.70.010.19.10.80.84.27.3-116.0-41.95.61.64.121.03.71.34.6-5.14.15.06.07.74.94.24.7-23.43.94.64.624.2-22.56.16.7-10.66.21.64.6-16.12.72.612.610.013.4

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value21152136223122362232223525212590244625202657267227302803249819271890188819291996194919001915199319591911197419751962193519201918187317961907194319121877196819501781594498641627619
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax47.546.90.047.747.447.145.349.346.847.646.048.549.049.846.947.846.244.945.045.544.343.242.843.844.342.944.543.843.242.642.342.541.439.841.642.541.540.742.342.440.435.128.936.735.434.4

us-gaap:CostOfGoodsAndServicesSold us-gaap:AdjustmentsForChangeInAccountingPrinciple

ctl:ChangeinAccountingPrincipleUniversalServiceFund


Cost
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-239.0-253.0-204.0-215.0-264.0-256.0-203.0-220.0
Percentage of CostOfGoodsAndServicesSold-10.7-11.3-9.1-9.6-10.5-9.9-8.3-8.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-5.4-4.3-4.5-4.7-4.9-3.9-4.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctl:ChangeinAccountingPrincipleUniversalServiceFund0.00.00.00.00.00.00.00.0

us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value12141212126712681264127813551398132213841450150015291530
Percentage of CostOfGoodsAndServicesSold57.456.756.856.756.657.253.754.054.054.954.656.156.054.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.326.60.027.126.826.924.326.625.326.225.127.227.427.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value90192496496896895711661192112411361207117212011273
Percentage of CostOfGoodsAndServicesSold42.643.343.243.343.442.846.346.046.045.145.443.944.045.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.220.30.020.720.520.220.922.721.521.520.921.321.522.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ctl:Consumer


Cost
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4247424269807787103115124158
Percentage of CostOfGoodsAndServicesSold1.92.11.91.92.73.13.13.53.94.34.55.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.01.00.90.91.21.51.51.61.82.12.22.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Consumer0.00.00.00.00.00.00.00.00.00.00.012.0

us-gaap:OperatingSegments, ctl:Enterprise


Cost
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value490478463447551544497496533491500514
Percentage of CostOfGoodsAndServicesSold22.021.420.720.021.921.020.319.720.118.418.318.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.010.29.89.49.910.49.59.49.28.99.09.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Enterprise0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:InternationalandGlobalAccounts


Cost
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value241229232233258269258259267254263272
Percentage of CostOfGoodsAndServicesSold10.810.210.410.410.210.410.510.310.09.59.69.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.04.94.94.94.65.14.94.94.64.64.74.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:InternationalandGlobalAccounts0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:SmallandMediumBusiness


Cost
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value859499104151155147153160154147153
Percentage of CostOfGoodsAndServicesSold3.84.24.44.76.06.06.06.16.05.85.45.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.02.02.12.22.73.02.82.92.82.82.62.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:SmallandMediumBusiness0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:Wholesale


Cost
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value106120132131137144145141144158167176
Percentage of CostOfGoodsAndServicesSold4.85.45.95.95.45.65.95.65.45.96.16.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.02.62.82.82.52.72.82.72.52.93.03.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Wholesale0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, lumn:BusinessSegment


Cost
Period End2021-06-302021-03-312020-06-302020-03-31
Value862881919907
Percentage of CostOfGoodsAndServicesSold40.841.241.240.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax19.419.319.519.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:BusinessSegment26.526.526.726.2

us-gaap:OperatingSegments, lumn:MassMarketSegment


Cost
Period End2021-06-302021-03-312020-06-302020-03-31
Value39434849
Percentage of CostOfGoodsAndServicesSold1.82.02.22.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.91.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:MassMarketSegment3.23.53.83.8

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value39184042693442794289424854024400439910926
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax88.088.70.091.391.089.597.083.884.2206.6

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-302021-03-312020-01-312018-09-302017-12-312017-09-302016-12-312016-09-302015-12-312013-12-312013-09-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value0.08.0-67.0-33.00.00.00.0-27.00.010.00.0150.0-202.0-7.00.0-1.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.0100.0100.00.00.00.0100.00.0100.00.0100.00.0100.0100.00.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.20.0-0.60.00.00.0-0.60.00.20.00.30.0-4.4-0.20.0-0.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:LongtermDebtType

us-gaap:SeniorNotes


Gains
Period End2020-12-312020-09-302020-06-302020-01-312020-03-31
Value-27.04.0-165.0-67.079
Percentage of GainsLossesOnExtinguishmentOfDebt0.00.00.00.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.1-3.50.01.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:SeniorNotes0.00.00.00.00.0

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value674632-2208.0480513433349410502-6027.0-2365.0329237236541394030774249317380430329234323157299323331330-1005.0
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.113.90.010.210.99.16.37.89.6-114.0-40.96.04.24.21.03.41.07.31.75.77.28.69.67.25.37.33.56.67.17.37.3-22.3

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value515253555556605758594648-49.0-47.054-55.0-54.0
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest7.68.2-2.411.510.712.917.213.911.6-1.0-1.914.6-20.7-19.938.8-137.5-17.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.10.01.21.21.21.11.11.11.10.80.9-0.9-0.81.3-1.3-1.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value168157811141361191261081311384757-55.0121-1063.0472314432971211449212491131-31.0111130128914012520714115249131829463127133140149160
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.83.40.02.42.92.52.32.12.52.60.81.0-1.02.1-20.01.20.63.40.72.22.83.32.12.72.12.9-0.72.52.92.82.00.92.84.63.13.31.12.81.82.01.47.57.88.08.48.9

us-gaap:IncomeTaxExpenseBenefit us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value121313131412141414151211-12.0-12.016-23.0-21.0
Percentage of IncomeTaxExpenseBenefit7.18.316.011.410.310.111.113.010.710.925.519.321.8-9.934.0-100.0-14.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.30.00.30.30.30.30.30.30.30.20.2-0.2-0.20.4-0.6-0.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value5.05.06.05.05.0
Percentage of IncomeTaxExpenseBenefit3.03.27.44.43.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.00.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value522123-71.0146.020-76.0157.00.0-382.0-294.02.014118265-5.05332310.0119.013365.06.0-2.01310.03.0-1.0388.0232832-1.0181.0944.698-26.0-150.0-250.8392.839
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.20.50.0-1.50.30.10.4-1.40.30.10.0-6.9-5.30.00.32.96.5-0.11.27.40.20.20.20.30.80.10.1-0.00.30.20.1-0.00.80.20.50.60.7-0.00.40.02.10.3-1.5-8.6-14.20.2

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value384389396409414449484496518523539557546535481362320318320327340331328329327328330325325331328329325316315326335343340324280131141138140142
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.68.50.08.78.89.58.79.49.99.99.310.19.89.59.09.07.87.67.57.57.77.57.37.27.47.47.47.27.27.37.27.37.27.06.97.17.37.47.37.06.47.88.27.97.97.9

us-gaap:InterestExpense us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value2120212016-5.0
Percentage of InterestExpense5.55.15.34.93.9-1.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.40.00.40.3-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value357387373426445383522456570480567510570491484293369255379262398262396260384270404262407265418268382265408268973-244.04651220-530.07470203611-331.72765
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.08.50.09.19.48.19.48.710.99.19.89.310.28.79.17.39.06.18.86.09.06.08.85.78.76.19.15.89.05.89.25.98.45.98.95.921.1-5.310.026.5-12.04.111.835.0-18.73.7

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value506475-2289.0366377314223302371-6165.0-2412.02722921151117921716342152196236338205143192188188193203239-1045.026929823327074200109140102211225232238252
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.410.40.07.88.06.64.05.87.1-116.6-41.74.95.22.021.02.30.43.91.03.54.55.47.64.53.24.34.24.24.34.55.3-23.15.96.65.15.91.64.32.33.02.312.413.113.313.414.0

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value393940424144464344443437-37.0-35.038-32.0-33.0
Percentage of NetIncomeLoss7.78.2-1.711.510.914.020.614.211.9-0.7-1.413.6-12.7-30.441.3-188.2-20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.90.00.90.90.90.80.80.80.80.60.7-0.7-0.60.9-0.8-0.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value16151515115.0
Percentage of NetIncomeLoss3.23.2-0.74.12.91.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.30.00.30.20.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value506475-2289.0366377314223302371-6165.0-2412.02722921151117921716342152196236338205143192188188193203239-1045.026929823327074200107153101211224232238252
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.098.2109.399.9100.099.9100.0100.2100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.410.40.07.88.06.64.05.87.1-116.6-41.74.95.22.021.02.30.43.91.03.54.55.47.64.53.24.34.24.24.34.55.3-23.15.96.65.15.91.64.32.33.32.312.413.013.313.514.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value506475-2289.0366377314223302236338205143192188188193203239-1045.026929823327073200107140102209219232238
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.410.40.07.88.06.64.05.85.47.64.53.24.34.24.24.34.55.3-23.15.96.65.15.91.64.32.33.02.312.312.713.313.4

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value506475-2289.0366377314223302236338205143192188188193203239-1045.026929823327073200107140102209219232238
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.410.40.07.88.06.64.05.85.47.64.53.24.34.24.24.34.55.3-23.15.96.65.15.91.64.32.33.02.312.312.713.313.4

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-332.0-355.0-399.0-408.0-390.0-547.0-498.0-540.0-474.0-528.0-524.0-565.0-530.0-514.0-470.0-348.0-327.0-324.0-318.0-346.0-333.0-314.0-321.0-327.0-315.0-326.0-326.0-320.0-332.0-322.0-311.0-320.0-321.0-277.0-292.0-314.0-534.0-323.0-341.0-317.0-294.0-125.065-125.859-134.0-136.0-131.725
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.5-7.80.0-8.7-8.3-11.5-8.9-10.3-9.1-10.0-9.1-10.3-9.5-9.1-8.8-8.6-8.0-7.7-7.4-7.9-7.6-7.1-7.2-7.2-7.1-7.3-7.3-7.1-7.3-7.1-6.8-7.1-7.1-6.1-6.4-6.9-11.6-7.0-7.3-6.9-6.7-7.4-7.3-7.7-7.7-7.3

us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-332.0-355.0-399.0-408.0-390.0-547.0-498.0-540.0-474.0-528.0-524.0-565.0-530.0-514.0-470.0-348.0-327.0-324.0-318.0-346.0-333.0-314.0-321.0-327.0-315.0-326.0-326.0-320.0-332.0-322.0-311.0-320.0
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-7.5-7.80.0-8.7-8.3-11.5-8.9-10.3-9.1-10.0-9.1-10.3-9.5-9.1-8.8-8.6-8.0-7.7-7.4-7.9-7.6-7.1-7.2-7.2-7.1-7.3-7.3-7.1-7.3-7.1-6.8-7.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1006987-1809.0888903980847950976-5499.0-1841.0894767750524487367631392595650694751656549649483619655653641-685.0715782666736657654533551459464486506523545
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.621.70.019.019.220.615.218.118.7-104.0-31.916.213.813.39.812.19.015.09.113.614.815.816.814.412.414.610.913.714.414.414.1-15.215.817.314.516.114.214.211.512.010.427.428.228.929.530.3

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Operating
Period End2021-06-302020-06-30
Value1006903
Percentage of OperatingIncomeLoss100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.619.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems0.00.0

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value80-86.0144499.0-239.0117-112.0-8.05.0-40.0-1.0-239.07911184.0-2.0-12.0-4.0-4.0-1.0-4.0-10.011-11.0-7.0-16.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.8-1.90.01.00.2-5.02.1-2.1-0.20.1-0.7-0.0-4.31.40.20.40.1-0.0-0.3-0.1-0.1-0.0-0.1-0.20.2-0.2-0.2-0.4

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value5234-3.01.024-98.0-14.0-44.044-5.0-19.02516211114-7.0-6.02.0-19.07.0177.02.0122.04.05.0-7.09.07.09.04.0398.0123.020-1.07.0-14.06.48154.04.010
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.20.70.00.00.5-2.1-0.3-0.80.8-0.1-0.30.50.30.40.20.3-0.2-0.10.0-0.40.20.40.20.00.30.00.10.1-0.20.20.20.20.10.90.20.30.10.4-0.00.2-0.30.40.90.20.20.6

us-gaap:OtherNonoperatingIncomeExpense us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, ctl:AccumulatedDefinedBenefitPlansAdjustmentNetCurtailmentAttributableToParent


Other
Period End2020-12-312020-09-30
Value0.04.0
Percentage of OtherNonoperatingIncomeExpense-0.0400.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome ctl:AccumulatedDefinedBenefitPlansAdjustmentNetCurtailmentAttributableToParent0.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-06-302016-03-31
Value1.02.02.01.03.01.01.03.02.02.03.03.0-3.0-3.03.03.03.03.03.0
Percentage of OtherNonoperatingIncomeExpense1.95.9-66.7100.012.5-1.0-7.1-6.84.5-40.0-15.812.0-18.8-14.321.4-42.9-50.042.917.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.10.00.00.10.00.00.10.1-0.1-0.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-06-302016-03-31
Value505051505250575456574345-46.0-44.05152514542
Percentage of OtherNonoperatingIncomeExpense96.2147.1-1700.05000.0216.7-51.0-407.1-122.7127.3-1140.0-226.3180.0-287.5-209.5364.3-742.9-850.0642.9247.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.10.01.11.11.11.01.01.11.10.70.8-0.8-0.81.31.31.21.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4453455546534686471147475570525152225289577855065577563353234034409042094289438243984401447645544419445144384514454145384542451545254513458345714612461046534596440616951722174817721800
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value902914939946
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.320.119.919.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.320.119.919.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:InternationalandGlobalAccounts lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:LargeEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value903907937939
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.319.919.919.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.319.919.919.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:LargeEnterprise lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value670705748748
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.015.515.915.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.015.515.915.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:MidMarketEnterprise lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:Wholesale, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value774795824831
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.417.517.517.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.417.517.517.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:Wholesale lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value109110128132
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.42.42.72.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.42.42.72.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:ComputeAndApplicationServices lumn:InternationalandGlobalAccounts lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:LargeEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value156150138137
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.53.32.92.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.53.32.92.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:ComputeAndApplicationServices lumn:LargeEnterprise lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value28283226
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.60.70.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.60.70.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:ComputeAndApplicationServices lumn:MidMarketEnterprise lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:Wholesale, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value8.08.06.06.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:ComputeAndApplicationServices lumn:Wholesale lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value184186174176
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.14.13.73.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.14.13.73.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:FiberInfrastructureServices lumn:InternationalandGlobalAccounts lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:LargeEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value115109123128
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.42.62.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.42.62.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:FiberInfrastructureServices lumn:LargeEnterprise lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value51585450
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.31.11.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.31.11.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:FiberInfrastructureServices lumn:MidMarketEnterprise lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:Wholesale, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value127123122123
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.92.72.62.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.92.72.62.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:FiberInfrastructureServices lumn:Wholesale lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:IPDataServices, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value427427432437
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.69.49.29.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.69.49.29.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:IPDataServices lumn:InternationalandGlobalAccounts lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:IPDataServices, lumn:LargeEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value388395399401
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.78.78.58.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.78.78.58.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:IPDataServices lumn:LargeEnterprise lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:IPDataServices, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value436452462465
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.89.99.89.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.89.99.89.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:IPDataServices lumn:MidMarketEnterprise lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:IPDataServices, lumn:Wholesale, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value297305313318
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.76.76.66.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.76.76.66.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:IPDataServices lumn:Wholesale lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value182191205201
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.14.24.44.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.14.24.44.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:VoiceAndOther lumn:InternationalandGlobalAccounts lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:LargeEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value244253277273
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.55.65.95.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.55.65.95.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:VoiceAndOther lumn:LargeEnterprise lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value155167200207
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.53.74.24.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.53.74.24.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:VoiceAndOther lumn:MidMarketEnterprise lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:Wholesale, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value342359383384
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.77.98.18.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.77.98.18.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:VoiceAndOther lumn:Wholesale lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value301296304301
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.86.56.56.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.86.56.56.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:ComputeAndApplicationServices lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:ConsumerBroadband, lumn:MassMarketSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value670679671669
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.014.914.214.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.014.914.214.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:ConsumerBroadband lumn:MassMarketSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value477476473477
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.710.510.010.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.710.510.010.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:FiberInfrastructureServices lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:IPDataServices, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value1548157916061621
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.834.734.134.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.834.734.134.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:IPDataServices lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:SBGBroadband, lumn:MassMarketSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value35353436
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.80.70.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.80.70.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:SBGBroadband lumn:MassMarketSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value92397010651065
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.721.322.622.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.721.322.622.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:VoiceAndOther lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:MassMarketSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value499520558578
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.211.411.812.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.211.411.812.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:VoiceAndOther lumn:MassMarketSegment100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value3249332134483464
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax73.072.973.273.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax73.072.973.273.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:MassMarketSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value1204123412631283
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.027.126.827.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.027.126.827.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:MassMarketSegment100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4924502951255167519252285570560655785647577858185902594553234034409042094289438243984401447645544419445144384514454145384542451545254513458345714612461046534596440616951722174817721800
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax110.6110.4110.1110.3110.2110.1100.0106.8106.8106.8100.0105.7105.8105.5100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:AdjustmentsForChangeInAccountingPrinciple

ctl:ChangeinAccountingPrincipleUniversalServiceFund


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-239.0-253.0-204.0-215.0-264.0-256.0-203.0-220.0
Percentage of Revenues-4.7-4.9-3.9-4.1-4.7-4.6-3.6-3.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.1-5.4-4.3-4.5-4.7-4.9-3.9-4.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctl:ChangeinAccountingPrincipleUniversalServiceFund0.00.00.00.00.00.00.00.0

us-gaap:Revenues us-gaap:ConsolidationItems

us-gaap:OperatingSegments


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value492450295125516751925228557056065578564763245640571757625674384539074037
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0109.496.996.996.9106.695.395.595.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax110.6110.4110.1110.3110.2110.1100.0106.8106.8106.8109.4102.4102.5102.3106.695.395.595.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Revenues us-gaap:ConsolidationItems, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value1004101310311041
Percentage of Revenues20.420.119.919.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.522.221.921.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:InternationalandGlobalAccounts lumn:BusinessSegment111.3110.8109.8110.0

us-gaap:OperatingSegments, lumn:LargeEnterprise, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value931937973966
Percentage of Revenues18.918.618.718.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.920.620.720.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:LargeEnterprise lumn:BusinessSegment103.1103.3103.8102.9

us-gaap:OperatingSegments, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value682716755761
Percentage of Revenues13.914.214.514.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.315.716.016.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:MidMarketEnterprise lumn:BusinessSegment101.8101.6100.9101.7

us-gaap:OperatingSegments, lumn:Wholesale, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value905929958969
Percentage of Revenues18.418.518.518.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.320.420.320.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:Wholesale lumn:BusinessSegment116.9116.9116.3116.6

us-gaap:Revenues us-gaap:ConsolidationItems, us-gaap:ProductOrService

us-gaap:OperatingSegments, ctl:Broadband


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value731730726722718718718722703702705712
Percentage of Revenues14.314.114.013.812.912.812.912.812.212.111.912.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.715.615.415.212.913.713.713.712.212.712.612.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Broadband0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:IPDataServices


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value158015761592162417611760173017491756172417461735
Percentage of Revenues30.830.530.731.131.631.431.031.030.429.629.629.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.033.633.834.231.633.533.133.130.431.331.330.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:IPDataServices0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:ITManagedServices


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value114117123125130126135144146154162162
Percentage of Revenues2.22.32.42.42.32.22.42.62.52.62.72.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.52.52.62.62.32.42.62.72.52.82.92.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:ITManagedServices0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:RegulatoryRevenue


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value152153154156160157158159180181185183
Percentage of Revenues3.03.03.03.02.92.82.82.83.13.13.13.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.33.33.33.32.93.03.03.03.13.33.33.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:RegulatoryRevenue0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:TransportInfrastructure


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value127412671216123213131309129112901356134513641368
Percentage of Revenues24.924.523.423.623.623.323.122.823.523.123.123.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.427.025.826.023.624.924.724.423.524.424.524.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:TransportInfrastructure0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:Voice


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value391401409421453462477489505565546557
Percentage of Revenues7.67.87.98.18.18.28.68.78.79.79.39.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.48.68.78.98.18.89.19.28.710.39.89.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Voice0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:VoiceCollaboration


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value8588989459209801013100510231053105610891111
Percentage of Revenues16.717.418.217.617.618.118.018.118.218.218.518.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.419.220.119.417.619.319.219.318.219.219.519.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:VoiceCollaboration0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:ProductAndServiceOther


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value25252728556164717991105117
Percentage of Revenues0.50.50.50.51.01.11.11.31.41.61.82.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.50.60.61.01.21.21.31.41.71.92.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:ProductAndServiceOther0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Revenues us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value179179192201
Percentage of Revenues3.63.63.73.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.03.94.14.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:ComputeAndApplicationServices lumn:InternationalandGlobalAccounts lumn:BusinessSegment164.2162.7150.0152.3

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:LargeEnterprise, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value172165160154
Percentage of Revenues3.53.33.12.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.93.63.43.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:ComputeAndApplicationServices lumn:LargeEnterprise lumn:BusinessSegment110.3110.0115.9112.4

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value36363534
Percentage of Revenues0.70.70.70.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.80.70.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:ComputeAndApplicationServices lumn:MidMarketEnterprise lumn:BusinessSegment128.6128.6109.4130.8

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:Wholesale, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value49484546
Percentage of Revenues1.01.00.90.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.11.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:ComputeAndApplicationServices lumn:Wholesale lumn:BusinessSegment612.5600.0750.0766.7

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value216216202202
Percentage of Revenues4.44.33.93.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.94.74.34.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:FiberInfrastructureServices lumn:InternationalandGlobalAccounts lumn:BusinessSegment117.4116.1116.1114.8

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:LargeEnterprise, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value127124136138
Percentage of Revenues2.62.52.62.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.92.72.92.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:FiberInfrastructureServices lumn:LargeEnterprise lumn:BusinessSegment110.4113.8110.6107.8

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value53605754
Percentage of Revenues1.11.21.11.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.31.21.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:FiberInfrastructureServices lumn:MidMarketEnterprise lumn:BusinessSegment103.9103.4105.6108.0

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:Wholesale, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value155154152153
Percentage of Revenues3.13.12.92.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.53.43.23.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:FiberInfrastructureServices lumn:Wholesale lumn:BusinessSegment122.0125.2124.6124.4

us-gaap:OperatingSegments, lumn:IPDataServices, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value427427432437
Percentage of Revenues8.78.58.38.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.69.49.29.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:IPDataServices lumn:InternationalandGlobalAccounts lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:IPDataServices, lumn:LargeEnterprise, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value388395400401
Percentage of Revenues7.97.97.77.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.78.78.58.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:IPDataServices lumn:LargeEnterprise lumn:BusinessSegment100.0100.0100.3100.0

us-gaap:OperatingSegments, lumn:IPDataServices, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value438453463466
Percentage of Revenues8.99.08.98.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.89.99.89.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:IPDataServices lumn:MidMarketEnterprise lumn:BusinessSegment100.5100.2100.2100.2

us-gaap:OperatingSegments, lumn:IPDataServices, lumn:Wholesale, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value297305313318
Percentage of Revenues6.06.16.06.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.76.76.66.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:IPDataServices lumn:Wholesale lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value182191205201
Percentage of Revenues3.73.83.93.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.14.24.44.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:VoiceAndOther lumn:InternationalandGlobalAccounts lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:LargeEnterprise, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value244253277273
Percentage of Revenues5.05.05.35.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.55.65.95.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:VoiceAndOther lumn:LargeEnterprise lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value155167200207
Percentage of Revenues3.13.33.94.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.53.74.24.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:VoiceAndOther lumn:MidMarketEnterprise lumn:BusinessSegment100.0100.0100.0100.0

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:Wholesale, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value404422448452
Percentage of Revenues8.28.48.68.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.19.39.59.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:VoiceAndOther lumn:Wholesale lumn:BusinessSegment118.1117.5117.0117.7

us-gaap:Revenues us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ctl:Broadband, ctl:Consumer


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value731730726722718718718722703702705712
Percentage of Revenues14.314.114.013.812.912.812.912.812.212.111.912.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.715.615.415.212.913.713.713.712.212.712.612.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Broadband ctl:Consumer0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:IPDataServices, ctl:Enterprise


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value612611623628703691681688682659667665
Percentage of Revenues11.911.812.012.012.612.312.212.211.811.311.311.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.213.013.213.212.613.213.013.011.812.012.011.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:IPDataServices ctl:Enterprise0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:IPDataServices, ctl:InternationalandGlobalAccounts


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value389381386400419417420420434423431440
Percentage of Revenues7.67.47.47.77.57.47.57.47.57.37.37.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.48.18.28.47.57.98.07.97.57.77.77.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:IPDataServices ctl:InternationalandGlobalAccounts0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:IPDataServices, ctl:SmallandMediumBusiness


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value264266263269299295290300294294299291
Percentage of Revenues5.25.15.15.15.45.35.25.35.15.15.14.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.75.75.65.75.45.65.65.75.15.35.45.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:IPDataServices ctl:SmallandMediumBusiness0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:IPDataServices, ctl:Wholesale


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value315318320327340357339341346348349339
Percentage of Revenues6.16.26.26.36.16.46.16.06.06.05.95.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.86.86.86.96.16.86.56.46.06.36.36.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:IPDataServices ctl:Wholesale0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:ITManagedServices, ctl:Enterprise


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value515158565959667476777773
Percentage of Revenues1.01.01.11.11.11.11.21.31.31.31.31.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.11.21.21.11.11.31.41.31.41.41.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:ITManagedServices ctl:Enterprise0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:ITManagedServices, ctl:InternationalandGlobalAccounts


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value515255585855555758626973
Percentage of Revenues1.01.01.11.11.01.01.01.01.01.11.21.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.11.21.21.01.01.11.11.01.11.21.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:ITManagedServices ctl:InternationalandGlobalAccounts0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:ITManagedServices, ctl:SmallandMediumBusiness


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value121310.010.01111121211131414
Percentage of Revenues0.20.30.20.20.20.20.20.20.20.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.30.20.20.20.20.20.20.20.20.30.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:ITManagedServices ctl:SmallandMediumBusiness0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:ITManagedServices, ctl:Wholesale


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.01.00.01.02.01.02.01.01.02.02.02.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:ITManagedServices ctl:Wholesale0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:RegulatoryRevenue, ctl:Consumer


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value152153154156160157158159180181185183
Percentage of Revenues3.03.03.03.02.92.82.82.83.13.13.13.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.33.33.33.32.93.03.03.03.13.33.33.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:RegulatoryRevenue ctl:Consumer0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:TransportInfrastructure, ctl:Enterprise


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value427420381380408405368364396374381399
Percentage of Revenues8.38.17.37.37.37.26.66.46.96.46.56.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.29.08.18.07.37.77.06.96.96.86.87.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:TransportInfrastructure ctl:Enterprise0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:TransportInfrastructure, ctl:InternationalandGlobalAccounts


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value323315311316334331333320329317309321
Percentage of Revenues6.36.16.06.06.05.96.05.75.75.45.25.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.96.76.66.76.06.36.46.15.75.85.55.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:TransportInfrastructure ctl:InternationalandGlobalAccounts0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:TransportInfrastructure, ctl:SmallandMediumBusiness


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value87859189101106106107109117135110
Percentage of Revenues1.71.61.81.71.81.91.91.91.92.02.31.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.91.81.91.91.82.02.02.01.92.12.42.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:TransportInfrastructure ctl:SmallandMediumBusiness0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:TransportInfrastructure, ctl:Wholesale


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value437447433447470467484499522537539538
Percentage of Revenues8.58.78.38.68.48.38.78.89.09.29.19.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.49.59.29.48.48.99.39.49.09.89.79.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:TransportInfrastructure ctl:Wholesale0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:Voice, ctl:Consumer


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value391401409421453462477489505565546557
Percentage of Revenues7.67.87.98.18.18.28.68.78.79.79.39.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.48.68.78.98.18.89.19.28.710.39.89.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Voice ctl:Consumer0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:VoiceCollaboration, ctl:Enterprise


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value340357371356385395390397404395398410
Percentage of Revenues6.66.97.16.86.97.07.07.07.06.86.76.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.37.67.97.56.97.57.57.57.07.27.17.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:VoiceCollaboration ctl:Enterprise0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:VoiceCollaboration, ctl:InternationalandGlobalAccounts


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value93879791939694941029094101
Percentage of Revenues1.81.71.91.71.71.71.71.71.81.51.61.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.01.92.11.91.71.81.81.81.81.61.71.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:VoiceCollaboration ctl:InternationalandGlobalAccounts0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:VoiceCollaboration, ctl:SmallandMediumBusiness


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value255271282290320322328336342361371369
Percentage of Revenues5.05.25.45.55.75.75.96.05.96.26.36.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.55.86.06.15.76.16.36.45.96.66.76.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:VoiceCollaboration ctl:SmallandMediumBusiness0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:VoiceCollaboration, ctl:Wholesale


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value170183195183182200193196205210226231
Percentage of Revenues3.33.53.83.53.33.63.53.53.53.63.83.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.73.94.13.93.33.83.73.73.53.84.14.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:VoiceCollaboration ctl:Wholesale0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, lumn:CAFII, lumn:MassMarketSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value122123123123
Percentage of Revenues2.52.42.42.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.72.72.62.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:CAFII lumn:MassMarketSegment0.00.00.00.0

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value436428432435
Percentage of Revenues8.98.58.38.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.89.49.29.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:ComputeAndApplicationServices lumn:BusinessSegment144.9144.6142.1144.5

us-gaap:OperatingSegments, lumn:ConsumerBroadband, lumn:MassMarketSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value723731726722
Percentage of Revenues14.714.514.013.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.216.015.415.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:ConsumerBroadband lumn:MassMarketSegment107.9107.7108.2107.9

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value551554547547
Percentage of Revenues11.211.010.510.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.412.211.611.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:FiberInfrastructureServices lumn:BusinessSegment115.5116.4115.6114.7

us-gaap:OperatingSegments, lumn:IPDataServices, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value1550158016081622
Percentage of Revenues31.531.431.031.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.834.734.134.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:IPDataServices lumn:BusinessSegment100.1100.1100.1100.1

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value985103311301133
Percentage of Revenues20.020.521.821.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.122.724.023.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:VoiceAndOther lumn:BusinessSegment106.7106.5106.1106.4

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:MassMarketSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value518541587607
Percentage of Revenues10.510.811.311.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.611.912.512.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:VoiceAndOther lumn:MassMarketSegment103.8104.0105.2105.0

us-gaap:OperatingSegments, us-gaap:ProductAndServiceOther, ctl:Consumer


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value25252728556164717991105117
Percentage of Revenues0.50.50.50.51.01.11.11.31.41.61.82.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.50.60.61.01.21.21.31.41.71.92.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:ProductAndServiceOther ctl:Consumer0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Revenues us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ctl:Consumer


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1299130913161327138613981417144112851355135213791400142014371447
Percentage of Revenues25.325.325.325.424.924.925.425.522.223.322.923.226.335.235.134.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.927.927.928.024.926.627.127.222.224.624.224.526.335.235.134.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Consumer0.00.00.00.00.00.00.00.00.00.00.0104.70.00.00.00.0

us-gaap:OperatingSegments, ctl:Enterprise


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value143014391433142015551550150515231558150515231547
Percentage of Revenues27.927.827.627.227.927.627.027.027.025.925.826.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax30.730.730.429.927.929.528.828.827.027.327.327.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Enterprise0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:InternationalandGlobalAccounts


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value856835849865904899902891923892903935
Percentage of Revenues16.716.216.416.516.216.016.215.816.015.315.315.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.417.818.018.216.217.117.316.816.016.216.216.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:InternationalandGlobalAccounts0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:SmallandMediumBusiness


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value618635646658731734736755756785819784
Percentage of Revenues12.112.312.412.613.113.113.213.413.113.513.913.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.313.613.713.913.114.014.114.313.114.314.713.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:SmallandMediumBusiness0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:Wholesale


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9229499489589941025101810371074109711161110
Percentage of Revenues18.018.418.318.317.818.318.318.418.618.918.918.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax19.820.320.120.217.819.519.519.618.619.920.019.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Wholesale0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, lumn:BusinessSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value3522359537173737
Percentage of Revenues71.571.571.671.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax79.178.978.978.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:BusinessSegment108.4108.3107.8107.9

us-gaap:OperatingSegments, lumn:MassMarketSegment


Revenuesus-gaap:
Period End2021-06-302021-03-312020-06-302020-03-31
Value1402143414751491
Percentage of Revenues28.528.528.428.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.531.531.331.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:MassMarketSegment116.4116.2116.8116.2

us-gaap:Revenues us-gaap:ProductOrService

ctl:Broadband


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value731730726722718718718722703702705712
Percentage of Revenues14.314.114.013.812.912.812.912.812.212.111.912.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.715.615.415.212.913.713.713.712.212.712.612.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctl:Broadband0.00.00.00.00.00.00.00.00.00.00.00.0

ctl:IPDataServices


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value158015761592162417611760173017491756172417461735
Percentage of Revenues30.830.530.731.131.631.431.031.030.429.629.629.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.033.633.834.231.633.533.133.130.431.331.330.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctl:IPDataServices0.00.00.00.00.00.00.00.00.00.00.00.0

ctl:ITManagedServices


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value114117123125130126135144146154162162
Percentage of Revenues2.22.32.42.42.32.22.42.62.52.62.72.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.52.52.62.62.32.42.62.72.52.82.92.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctl:ITManagedServices0.00.00.00.00.00.00.00.00.00.00.00.0

ctl:RegulatoryRevenue


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value152153154156160157158159180181185183
Percentage of Revenues3.03.03.03.02.92.82.82.83.13.13.13.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.33.33.33.32.93.03.03.03.13.33.33.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctl:RegulatoryRevenue0.00.00.00.00.00.00.00.00.00.00.00.0

ctl:TransportInfrastructure


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value127412671216123213131309129112901356134513641368
Percentage of Revenues24.924.523.423.623.623.323.122.823.523.123.123.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.427.025.826.023.624.924.724.423.524.424.524.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctl:TransportInfrastructure0.00.00.00.00.00.00.00.00.00.00.00.0

ctl:Voice


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value391401409421453462477489505565546557
Percentage of Revenues7.67.87.98.18.18.28.68.78.79.79.39.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.48.68.78.98.18.89.19.28.710.39.89.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctl:Voice0.00.00.00.00.00.00.00.00.00.00.00.0

ctl:VoiceCollaboration


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value8588989459209801013100510231053105610891111
Percentage of Revenues16.717.418.217.617.618.118.018.118.218.218.518.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.419.220.119.417.619.319.219.318.219.219.519.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctl:VoiceCollaboration0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProductAndServiceOther


Revenuesus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value25252728556164717991105117
Percentage of Revenues0.50.50.50.51.01.11.11.31.41.61.82.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.50.60.61.01.21.21.31.41.71.92.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductAndServiceOther0.00.00.00.00.00.00.00.00.00.00.00.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value76275686685089585399283196093297496711151109110471088481010107968128317578578638518508238318438231047814818790748835871900870968268372243264282
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.116.618.618.119.018.017.815.818.417.616.917.620.019.720.717.621.619.223.518.218.518.916.918.819.519.119.218.218.318.618.123.218.018.117.216.418.118.919.318.922.015.821.713.914.915.7

us-gaap:SellingGeneralAndAdministrativeExpense us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value314317471437455410570397498454515493611603839592620-680.0591687680-689.0693637676-682.0632876
Percentage of SellingGeneralAndAdministrativeExpense41.241.954.451.450.848.157.547.851.948.752.951.054.854.483.174.476.4-81.878.180.278.8-81.081.577.481.3-80.976.883.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.17.010.19.39.78.610.27.69.58.68.99.011.010.719.613.514.1-15.513.215.115.4-15.515.614.114.9-15.013.919.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value448439395413440443422434462478459474504506
Percentage of SellingGeneralAndAdministrativeExpense58.858.145.648.649.251.942.552.248.151.347.149.045.245.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.19.68.58.89.39.37.68.38.89.07.98.69.09.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SellingGeneralAndAdministrativeExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ctl:Consumer


Selling
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value11411811911594102110109116124136135
Percentage of SellingGeneralAndAdministrativeExpense13.213.913.313.59.512.311.511.711.912.812.212.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.52.52.52.41.71.92.12.12.02.32.42.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Consumer0.00.00.00.00.00.00.00.00.00.00.010.3

us-gaap:OperatingSegments, ctl:Enterprise


Selling
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value115124135136129134143149135141145152
Percentage of SellingGeneralAndAdministrativeExpense13.314.615.115.913.016.114.916.013.914.613.013.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.52.62.92.92.32.62.72.82.32.62.62.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Enterprise0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:InternationalandGlobalAccounts


Selling
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value585861656565686862626468
Percentage of SellingGeneralAndAdministrativeExpense6.76.86.87.66.67.87.17.36.46.45.76.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.21.31.41.21.21.31.31.11.11.11.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:InternationalandGlobalAccounts0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:SmallandMediumBusiness


Selling
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9097109110116112120132125129136127
Percentage of SellingGeneralAndAdministrativeExpense10.411.412.212.911.713.512.514.212.813.312.211.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.92.12.32.32.12.12.32.52.22.32.42.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:SmallandMediumBusiness0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctl:Wholesale


Selling
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value181616171821212021182324
Percentage of SellingGeneralAndAdministrativeExpense2.11.91.82.01.82.52.22.12.21.92.12.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.30.30.40.30.40.40.40.40.30.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctl:Wholesale0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, lumn:BusinessSegment


Selling
Period End2021-06-302021-03-312020-06-302020-03-31
Value298306334342
Percentage of SellingGeneralAndAdministrativeExpense39.140.537.340.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.76.77.17.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:BusinessSegment9.29.29.79.9

us-gaap:OperatingSegments, lumn:MassMarketSegment


Selling
Period End2021-06-302021-03-312020-06-302020-03-31
Value150133144140
Percentage of SellingGeneralAndAdministrativeExpense19.717.616.116.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.42.93.12.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments lumn:MassMarketSegment12.510.811.410.9

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5894758828593946259964171640566474264728645086478870256733717434674793756115053650925466024701746796471184751747604487544897749520501475064650614511665178751984532545372954020546325509056842561395673554842219012203822562
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5894758828593946259964171640566474264728645086478870256733717434674793756115053650925466024701746796471184751747604487544897749520501475064650614511665178751984532545372954020546325509056842561395673554842219012203822562
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value11706113031116213689134621329113470136741369213543198282280322989234432349112960130861330613399138921398514036140601425014587147651502316445165981679817191167141840018856192892019720311206382082721976216549658964796069467
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.919.218.821.921.020.720.821.121.220.928.231.130.931.331.125.625.728.628.529.729.729.529.529.229.829.830.032.532.832.833.232.234.635.135.737.036.936.337.138.739.544.143.80.042.0

us-gaap:StockholdersEquity us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-265.0-268.0-272.0-172.0-178.0-181.0-184.0-49.0-52.0-55.0-58.0-255.0-260.0-263.0-235.0-152.0-156.0-159.0-162.0-170.0-174.0-177.0-180.0
Percentage of StockholdersEquity-2.3-2.4-2.4-1.3-1.3-1.4-1.4-0.4-0.4-0.4-0.3-1.1-1.1-1.1-1.0-1.2-1.2-1.2-1.2-1.2-1.2-1.3-1.3
Percentage of Assets-0.4-0.5-0.5-0.3-0.3-0.3-0.3-0.1-0.1-0.1-0.1-0.3-0.3-0.4-0.3-0.3-0.3-0.3-0.3-0.4-0.4-0.4-0.4
Percentage of Assets us-gaap:OtherPostretirementBenefitPlansDefinedBenefit us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-2126.0-2162.0-2197.0-2119.0-2155.0-2193.0-2229.0-2051.0-2091.0-2132.0-2173.0-2009.0-2041.0-2075.0-1731.0-1802.0-1836.0-1865.0-1895.0-1637.0-1663.0-1690.0-1715.0
Percentage of StockholdersEquity-18.2-19.1-19.7-15.5-16.0-16.5-16.5-15.0-15.3-15.7-11.0-8.8-8.9-8.9-7.4-13.9-14.0-14.0-14.1-11.8-11.9-12.0-12.2
Percentage of Assets-3.6-3.7-3.7-3.4-3.4-3.4-3.4-3.2-3.2-3.3-3.1-2.7-2.7-2.8-2.3-3.6-3.6-4.0-4.0-3.5-3.5-3.6-3.6
Percentage of Assets us-gaap:PensionPlansDefinedBenefit us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-48.0-64.0-79.0-95.0-111.0-114.0-39.0-54.0-43.0-17.00.0
Percentage of StockholdersEquity-0.4-0.6-0.7-0.7-0.8-0.9-0.3-0.4-0.3-0.10.0
Percentage of Assets-0.1-0.1-0.1-0.2-0.2-0.2-0.1-0.1-0.1-0.00.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-312008-12-31
Value-2710.0-2845.0-2813.0-2795.0-2902.0-2955.0-2680.0-2499.0-2419.0-2429.0-2461.0-2454.0-2490.0-2288.0-1995.0-1994.0-2050.0-2086.0-2117.0-1855.0-1881.0-1907.0-1934.0-1941.0-1959.0-2001.0-2017.0-789.0-779.0-795.0-802.0-1660.0-1688.0-1695.0-1701.0-984.0-998.0-1000.0-1012.0-158.0-141.0-139.0-141.0-89.0-85.0-123.0
Percentage of StockholdersEquity-23.2-25.2-25.2-20.4-21.6-22.2-19.9-18.3-17.7-17.9-12.4-10.8-10.8-9.8-8.5-15.4-15.7-15.7-15.8-13.4-13.5-13.6-13.8-13.6-13.4-13.6-13.4-4.8-4.7-4.7-4.7-9.9-9.2-9.0-8.8-4.9-4.9-4.8-4.9-0.7-0.7-1.4-1.5-0.9-0.90.0
Percentage of Assets-4.6-4.8-4.7-4.5-4.5-4.6-4.1-3.9-3.7-3.7-3.5-3.3-3.3-3.1-2.6-3.9-4.0-4.5-4.5-4.0-4.0-4.0-4.1-4.0-4.0-4.0-4.0-1.6-1.5-1.6-1.5-3.2-3.2-3.2-3.1-1.8-1.8-1.8-1.8-0.3-0.3-0.6-0.60.0-0.40.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value-271.0-351.0-265.0-409.0-458.0-467.0-228.0-345.0-233.0-225.0-230.0-190.0-189.050-29.0-40.0-58.0-62.0-60.0-48.0-44.0-40.0-39.0-25.0
Percentage of StockholdersEquity-2.3-3.1-2.4-3.0-3.4-3.5-1.7-2.5-1.7-1.7-1.2-0.8-0.80.2-0.1-0.3-0.4-0.5-0.4-0.3-0.3-0.3-0.3-0.2
Percentage of Assets-0.5-0.6-0.4-0.7-0.7-0.7-0.4-0.5-0.4-0.3-0.3-0.3-0.30.1-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-312008-12-31
Value2036120598209092113021376216342187422101223422257522852233992336023316233141437014637147331497015121152051518415178154601589616059163241653216671168741734317954182911869119079190521899918950189011885418236620061816094602045
Percentage of StockholdersEquity173.9182.2187.3154.4158.8162.8162.4161.6163.2166.7115.3102.6101.699.599.2110.9111.9110.7111.7108.8108.7108.2108.0108.5109.0108.8108.7100.5100.4100.5100.9107.499.499.198.994.393.591.890.885.884.264.264.163.463.60.0
Percentage of Assets34.535.035.233.833.333.833.834.134.634.832.531.931.431.230.828.428.731.631.832.332.332.031.931.732.532.432.632.632.933.033.534.534.334.835.334.934.533.333.733.233.328.328.00.026.70.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-312008-12-31
Value110511061097109710971098109010901090109010801081107910791069550550549547547546546544554563566569571571575584593604616626623622621619617602306305303299100
Percentage of StockholdersEquity9.49.89.88.08.18.38.18.08.08.05.44.74.74.64.64.24.24.14.13.93.93.93.93.93.93.83.83.53.43.43.43.53.33.33.23.13.13.03.02.82.83.23.23.23.20.0
Percentage of Assets1.91.91.81.81.71.71.71.71.71.71.51.51.51.41.41.11.11.21.21.21.21.11.11.11.11.11.11.11.11.11.11.11.11.11.21.11.11.11.11.11.11.41.40.01.30.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-312008-12-31
Value-7050.0-7556.0-8031.0-5743.0-6109.0-6486.0-6814.0-7018.0-7321.0-7693.0-1643.077710401336110334-51.0110-1.0791152132721778714114713113514466-173.011931244128515061688206723192663297132913302329832333146
Percentage of StockholdersEquity-60.2-66.8-71.9-42.0-45.4-48.8-50.6-51.3-53.5-56.8-8.33.44.55.74.70.3-0.40.8-0.00.60.81.51.91.20.61.01.00.80.80.90.4-1.06.56.66.77.58.310.011.112.113.734.134.234.334.20.0
Percentage of Assets-12.0-12.8-13.5-9.2-9.5-10.1-10.5-10.8-11.3-11.9-2.31.11.41.81.50.1-0.10.2-0.00.20.20.40.60.40.20.30.30.30.30.30.1-0.32.22.32.42.83.13.64.14.75.415.015.00.014.30.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value37463293317635044858469047684589387838203820411444514183419426942908496851622728279129262650335033053468357640183598374839073812364838753613383338474882352338085007114011431123
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.45.65.35.67.67.37.47.16.05.95.45.66.05.65.55.35.710.711.05.85.96.25.66.96.77.07.17.97.17.37.57.36.97.26.77.07.08.66.36.79.15.25.25.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value935486406526176315641690140441044148839070050155116034221422214019143812635515515512873418121916826621447621119428115301281123254626917224318620616124334
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.60.80.70.82.72.42.62.20.60.70.70.50.90.70.70.30.70.50.50.30.40.90.30.70.30.30.31.40.40.40.30.50.40.90.40.40.52.70.22.04.61.20.80.00.00.00.70.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312014-12-31
Value946503427547178415911717143144047451842073253758761646357216224142193128129
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.60.90.70.92.82.52.72.20.70.70.70.61.00.70.812.212.50.50.50.30.40.30.3

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value19051883196221432182217522592290244623472398246524712432255718881868185420171957197218711943195119551973198819781986188719771911190019241917197119201879195219981830667712685
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.23.23.33.43.43.43.53.53.83.63.43.43.33.33.43.73.74.04.34.24.23.94.14.04.04.04.03.93.93.73.83.73.63.63.53.63.53.33.53.53.33.03.23.0

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value90692480883591394180888410111026918123712601105941639691557547631628617581594599622580591628632597563570587552649628481390378348574041
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.61.41.31.41.51.21.41.61.61.31.71.71.51.21.31.41.21.21.31.31.31.21.21.21.31.21.21.21.21.21.11.11.11.01.21.10.80.70.70.60.30.20.2

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value579345542553267512044135240744396423919440304397633922938785382503764237100367183597035404348473430733724332043257132086312883062330188295772860626595165161632915556
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets97.585.675.867.781.880.085.183.486.184.482.681.578.576.974.973.271.069.968.166.264.962.460.659.457.355.653.152.750.448.575.474.168.9

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

ctl:CentralOfficeAndOtherNetworkElectronics


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value20692196081873618538137681414413248121781139597305412
Percentage of PropertyPlantAndEquipmentGross35.735.435.236.235.136.536.135.535.532.933.1
Percentage of Assets34.830.326.724.529.329.726.423.521.117.324.6
Percentage of Assets ctl:CentralOfficeAndOtherNetworkElectronics0.00.00.00.00.00.00.00.00.00.00.0

ctl:FiberConduitAndOtherOutsidePlant


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value265222466623936227981699616166151511418713030124238382
Percentage of PropertyPlantAndEquipmentGross45.844.544.944.543.441.741.341.440.642.051.3
Percentage of Assets44.738.134.130.236.134.030.227.424.122.138.0
Percentage of Assets ctl:FiberConduitAndOtherOutsidePlant0.00.00.00.00.00.00.00.00.00.00.0

ctl:SupportAssets


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value8261798480207586662370006578642062356098
Percentage of PropertyPlantAndEquipmentGross14.314.415.114.816.918.017.918.719.420.6
Percentage of Assets13.912.311.410.014.114.713.112.411.510.9
Percentage of Assets ctl:SupportAssets0.00.00.00.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value161123001704139912449041166937847744272
Percentage of PropertyPlantAndEquipmentGross2.84.13.22.73.22.33.22.72.62.51.7
Percentage of Assets2.73.62.41.92.61.92.31.81.61.31.2
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value848867871883563571575585579590206
Percentage of PropertyPlantAndEquipmentGross1.51.61.61.71.41.51.61.71.82.01.3
Percentage of Assets1.41.31.21.21.21.21.11.11.11.10.9
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value32917322143159630921303322981429346287602809727385268592649325872251162435223718231612262622155224642186921266207162018219553189171828517647169691635415661150591442713746130541227511569108931014193168571786875746459
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets55.854.853.249.447.346.545.344.443.642.338.236.134.833.632.246.945.548.647.148.046.444.843.541.439.938.236.534.833.532.030.229.027.125.624.222.521.019.218.116.415.635.934.428.6

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302012-12-312012-09-302011-12-312011-09-30
Value318425400443440431400438440429500446447444406269276414409458459
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2599326091263382629026079259562607925874258602579326408261682649426826268521763417583170161703917840178941796318069180681808918183184331832318435184931864618665187771882519032190131905419295194361929018024864887549097
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets44.144.444.342.040.640.540.340.040.139.837.635.735.635.935.534.934.536.536.238.138.037.838.037.136.936.736.836.236.436.136.035.935.335.035.234.834.633.934.634.032.939.539.740.3

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312013-01-312013-01-032012-12-312012-09-302012-06-302012-04-022012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1886718854188702147621469214732153421507215272152628031307703071530778304751963819639196501965020766207662074320742207572075820753207552066420674206742067420637217442173321627217322173221732217322173221726217242170220266102601026010251
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.032.031.834.333.533.533.333.233.433.239.941.941.341.240.338.938.642.241.844.444.143.743.642.642.441.941.440.840.840.439.939.740.840.40.00.040.239.839.40.038.238.738.337.046.846.645.4

us-gaap:Goodwill us-gaap:StatementBusinessSegments

ctl:Consumer


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-312013-12-312013-01-03
Value5655705470547054705470547054705475841027810278102781027810278102781034810348
Percentage of Goodwill30.032.832.932.932.832.832.832.827.133.433.533.752.349.649.550.147.6
Percentage of Assets9.511.311.011.010.910.910.910.910.814.013.813.621.921.620.520.00.0
Percentage of Assets ctl:Consumer0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

ctl:Enterprise


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value473847384738473847384738473847385222
Percentage of Goodwill25.122.122.122.122.022.022.022.018.6
Percentage of Assets8.07.67.47.47.37.37.37.37.4
Percentage of Assets ctl:Enterprise0.00.00.00.00.00.00.00.00.0

ctl:InternationalandGlobalAccounts


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value255526192605260926702643266326623595
Percentage of Goodwill13.512.212.112.212.412.312.412.412.8
Percentage of Assets4.34.24.14.14.14.14.14.15.1
Percentage of Assets ctl:InternationalandGlobalAccounts0.00.00.00.00.00.00.00.00.0

ctl:SmallandMediumBusiness


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value280832523259325932593259325932595193
Percentage of Goodwill14.915.115.215.215.115.215.115.118.5
Percentage of Assets4.75.25.15.15.05.05.15.07.4
Percentage of Assets ctl:SmallandMediumBusiness0.00.00.00.00.00.00.00.00.0

ctl:Wholesale


Goodwillus-gaap:
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312015-12-312014-12-312013-12-312013-01-032012-12-31
Value3114381338133813381338133813381364370.00.0327432743274
Percentage of Goodwill16.517.817.817.817.717.717.717.723.00.00.015.815.115.1
Percentage of Assets5.26.15.96.05.95.95.95.99.20.00.06.30.06.1
Percentage of Assets ctl:Wholesale0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

lumn:BusinessSegment


Goodwillus-gaap:
Period End2021-06-302021-03-312021-01-31
Value121701215712173
Percentage of Goodwill64.564.50.0
Percentage of Assets20.620.70.0
Percentage of Assets lumn:BusinessSegment0.00.00.0

lumn:Consumer


Goodwillus-gaap:
Period End2021-01-312020-12-31
Value-5655.05655
Percentage of Goodwill0.030.0
Percentage of Assets0.09.5
Percentage of Assets lumn:Consumer0.00.0

lumn:Enterprise


Goodwillus-gaap:
Period End2021-01-312020-12-31
Value-4738.04738
Percentage of Goodwill0.025.1
Percentage of Assets0.08.0
Percentage of Assets lumn:Enterprise0.00.0

lumn:InternationalandGlobalAccounts


Goodwillus-gaap:
Period End2021-01-312020-12-31
Value-2555.02555
Percentage of Goodwill0.013.5
Percentage of Assets0.04.3
Percentage of Assets lumn:InternationalandGlobalAccounts0.00.0

lumn:SmallandMediumBusiness


Goodwillus-gaap:
Period End2021-01-312020-12-31
Value-2808.02808
Percentage of Goodwill0.014.9
Percentage of Assets0.04.7
Percentage of Assets lumn:SmallandMediumBusiness0.00.0

lumn:Wholesale


Goodwillus-gaap:
Period End2021-01-312020-12-31
Value-3114.03114
Percentage of Goodwill0.016.5
Percentage of Assets0.05.2
Percentage of Assets lumn:Wholesale0.00.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill


Indefinite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value9.09.0278278269269269269269269269269269269269269268321268268268422418545418268268268
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.50.40.40.40.40.40.40.40.40.40.40.40.60.60.50.60.50.50.50.70.71.00.81.21.21.2

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302020-12-312019-12-31
Value766382199567
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0
Percentage of Assets13.013.814.8

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsNet

ctl:TradeNamesandPatents


Finite
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value858895103109117124131138146159
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.20.20.20.20.20.20.20.2
Percentage of Assets ctl:TradeNamesandPatents0.00.00.00.00.00.00.00.00.00.00.0

lumn:TradeNamesPatentsAndOther


Finite
Period End2021-06-302021-03-312020-12-31
Value31733177
Percentage of FiniteLivedIntangibleAssetsNet0.00.00.0
Percentage of Assets0.50.60.1
Percentage of Assets lumn:TradeNamesPatentsAndOther0.00.00.0

us-gaap:ComputerSoftwareIntangibleAsset


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312012-09-302012-06-302011-12-31
Value1481150915201567161216171599159915761536146814501454146912271248133814151399144714931622
Percentage of FiniteLivedIntangibleAssetsNet0.00.00.01843.51831.81702.11552.41467.01347.01238.71120.61050.7995.9923.90.00.00.00.00.00.00.00.0
Percentage of Assets2.52.62.62.52.52.52.52.52.42.42.12.02.01.92.62.62.72.72.62.62.72.9
Percentage of Assets us-gaap:ComputerSoftwareIntangibleAsset0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-312012-12-312012-09-302012-06-302011-12-31
Value58566035634466336934724575967902824585808911930996671005810876221424012596279732543472369839284162489359357052734176358239
Percentage of FiniteLivedIntangibleAssetsNet0.00.00.07803.57879.57626.37374.87249.57047.06919.46802.36745.76621.20.06840.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets9.910.310.710.610.811.311.712.212.813.212.712.713.013.414.44.44.75.65.97.07.47.88.38.59.811.513.113.413.914.7
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames


Finite
Period End2020-12-312019-12-31
Value77103
Percentage of FiniteLivedIntangibleAssetsNet0.0100.0
Percentage of Assets0.10.2
Percentage of Assets us-gaap:TradeNames0.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value1699166716861721184419522100
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.92.62.62.72.93.00.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-31
Value267827062791276628621020108411341165115811921126112310471286813823838838690689662660849840856843831829834823822841800796854900869639643
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.54.64.74.44.51.61.71.81.81.81.71.51.51.41.71.61.61.81.81.51.51.41.41.71.71.71.71.61.61.61.61.61.61.51.51.61.61.52.92.9

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value966101711341364144815811724171216341481193313871360150815559399449941179103610671039968108710491068122610691153118311111158128510941207132011341026139913601256298299394
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.71.92.22.32.52.72.62.52.32.81.91.82.02.11.91.92.12.52.22.32.22.02.22.12.22.42.12.32.32.12.22.42.02.22.42.11.82.52.42.31.41.41.7

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value748758753738759788804798852841832983750892
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.31.31.21.21.21.21.21.31.31.21.31.01.2

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value65107787663458797472570372586589649553735531528645214767485732663243509653494733484238264604554747973579391845774443462144093978374845834595493152075643401947375064107310111707
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.013.211.29.411.68.911.210.210.18.37.97.26.16.46.46.56.410.911.410.110.38.19.711.49.87.27.89.08.89.08.57.77.08.58.59.09.59.97.28.39.24.94.67.6

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value389387379401474416416419488
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.70.60.60.70.60.60.60.8

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value286307328335349369386318337297357374358428344216238177213255272302220268225259210224208255514498259274234254269279250252234109121168
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.60.50.50.60.60.50.50.50.50.50.50.60.50.40.50.40.50.50.60.60.50.50.50.50.40.40.40.51.01.00.50.50.40.50.50.50.40.40.40.50.60.7

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value294346314378337354311388374386337409344390370357290460301330505458318535423418309372342410339
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.60.50.60.50.60.50.60.60.60.50.60.50.50.50.70.61.00.60.71.11.00.71.10.90.80.60.70.70.80.7

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-09-302019-06-302010-12-312009-12-31
Value3150031769329273507273277753
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0
Percentage of Assets53.454.052.654.433.234.4

Debt And Capital Lease Obligations

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:DebtAndCapitalLeaseObligations


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312011-06-302010-12-31
Value311693144031837325923429934610346943512534788354903606136527373153737737726249782507719976199931971819616200252022520414203532045620671211512095920940209662058220585207882060521836213447328
Percentage of DebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.953.453.652.153.454.053.654.353.954.851.349.850.250.049.949.449.242.942.542.141.642.142.541.941.641.341.241.841.440.940.539.638.738.738.138.938.933.3

Long Term Debt And Capital Lease Obligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value285742759929410311053141433481323943338133193348583540935749368783694037283248542488118180181851818418165195081872218504188342025420121199821977119814201812039120283195951940019508196822066721356211421973473167253
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets48.546.949.549.749.052.350.051.651.553.850.448.749.649.449.349.248.939.038.738.938.641.139.338.038.540.940.139.539.138.739.039.238.136.535.935.735.736.438.037.336.033.232.1

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value3643347133423232309429572918291028262701252725022413
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.25.95.65.24.84.64.54.54.44.23.63.43.2

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent


Pension
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value43214435455643454428451645944140421342654319439248845085517851835362544855275228539054455511553456965755580837613924401240495844
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.37.57.76.96.97.17.16.46.56.66.16.06.66.86.810.310.511.711.811.211.411.511.611.411.611.611.67.47.87.87.810.8

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value28152800270730903124
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent61.860.962.759.756.5
Percentage of Assets4.74.33.94.16.6
Percentage of Assets us-gaap:OtherPostretirementBenefitPlansDefinedBenefit0.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value16561724156120572403
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent36.337.536.139.743.5
Percentage of Assets2.82.72.22.75.1
Percentage of Assets us-gaap:PensionPlansDefinedBenefit0.00.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312010-12-312009-12-31
Value41934233429043494301279227662683262225472642263926672362238911451123111110861106111111061138117712291246124712521268121212041248110111
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.17.27.26.96.74.44.34.14.13.93.83.63.63.23.22.32.22.42.32.42.42.32.42.42.52.52.52.52.52.42.32.30.50.5

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2020-12-312020-03-312019-12-312019-09-302019-06-30
Value14051316134213511467
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0
Percentage of Assets2.42.12.12.12.3

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value411
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.7

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value331
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.6

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value232
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.4

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value177
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.3

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value592
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets1.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value178417581770195520622200
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0
Percentage of Assets3.02.72.73.03.20.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value2212
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets3.7

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value428
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.7

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value11706113031116213689134621329113470136741369213543198282280322989234432349112960130861330613399138921398514036140601425014587147651502316445165981679817191167141840018856192892019720311206382082721976216549658964796069467
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.919.218.821.921.020.720.821.121.220.928.231.130.931.331.125.625.728.628.529.729.729.529.529.229.829.830.032.532.832.833.232.234.635.135.737.036.936.337.138.739.544.143.80.042.0

us-gaap:StockholdersEquity us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-265.0-268.0-272.0-172.0-178.0-181.0-184.0-49.0-52.0-55.0-58.0-255.0-260.0-263.0-235.0-152.0-156.0-159.0-162.0-170.0-174.0-177.0-180.0
Percentage of StockholdersEquity-2.3-2.4-2.4-1.3-1.3-1.4-1.4-0.4-0.4-0.4-0.3-1.1-1.1-1.1-1.0-1.2-1.2-1.2-1.2-1.2-1.2-1.3-1.3
Percentage of Assets-0.4-0.5-0.5-0.3-0.3-0.3-0.3-0.1-0.1-0.1-0.1-0.3-0.3-0.4-0.3-0.3-0.3-0.3-0.3-0.4-0.4-0.4-0.4
Percentage of Assets us-gaap:OtherPostretirementBenefitPlansDefinedBenefit us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-2126.0-2162.0-2197.0-2119.0-2155.0-2193.0-2229.0-2051.0-2091.0-2132.0-2173.0-2009.0-2041.0-2075.0-1731.0-1802.0-1836.0-1865.0-1895.0-1637.0-1663.0-1690.0-1715.0
Percentage of StockholdersEquity-18.2-19.1-19.7-15.5-16.0-16.5-16.5-15.0-15.3-15.7-11.0-8.8-8.9-8.9-7.4-13.9-14.0-14.0-14.1-11.8-11.9-12.0-12.2
Percentage of Assets-3.6-3.7-3.7-3.4-3.4-3.4-3.4-3.2-3.2-3.3-3.1-2.7-2.7-2.8-2.3-3.6-3.6-4.0-4.0-3.5-3.5-3.6-3.6
Percentage of Assets us-gaap:PensionPlansDefinedBenefit us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-48.0-64.0-79.0-95.0-111.0-114.0-39.0-54.0-43.0-17.00.0
Percentage of StockholdersEquity-0.4-0.6-0.7-0.7-0.8-0.9-0.3-0.4-0.3-0.10.0
Percentage of Assets-0.1-0.1-0.1-0.2-0.2-0.2-0.1-0.1-0.1-0.00.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-312008-12-31
Value-2710.0-2845.0-2813.0-2795.0-2902.0-2955.0-2680.0-2499.0-2419.0-2429.0-2461.0-2454.0-2490.0-2288.0-1995.0-1994.0-2050.0-2086.0-2117.0-1855.0-1881.0-1907.0-1934.0-1941.0-1959.0-2001.0-2017.0-789.0-779.0-795.0-802.0-1660.0-1688.0-1695.0-1701.0-984.0-998.0-1000.0-1012.0-158.0-141.0-139.0-141.0-89.0-85.0-123.0
Percentage of StockholdersEquity-23.2-25.2-25.2-20.4-21.6-22.2-19.9-18.3-17.7-17.9-12.4-10.8-10.8-9.8-8.5-15.4-15.7-15.7-15.8-13.4-13.5-13.6-13.8-13.6-13.4-13.6-13.4-4.8-4.7-4.7-4.7-9.9-9.2-9.0-8.8-4.9-4.9-4.8-4.9-0.7-0.7-1.4-1.5-0.9-0.90.0
Percentage of Assets-4.6-4.8-4.7-4.5-4.5-4.6-4.1-3.9-3.7-3.7-3.5-3.3-3.3-3.1-2.6-3.9-4.0-4.5-4.5-4.0-4.0-4.0-4.1-4.0-4.0-4.0-4.0-1.6-1.5-1.6-1.5-3.2-3.2-3.2-3.1-1.8-1.8-1.8-1.8-0.3-0.3-0.6-0.60.0-0.40.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value-271.0-351.0-265.0-409.0-458.0-467.0-228.0-345.0-233.0-225.0-230.0-190.0-189.050-29.0-40.0-58.0-62.0-60.0-48.0-44.0-40.0-39.0-25.0
Percentage of StockholdersEquity-2.3-3.1-2.4-3.0-3.4-3.5-1.7-2.5-1.7-1.7-1.2-0.8-0.80.2-0.1-0.3-0.4-0.5-0.4-0.3-0.3-0.3-0.3-0.2
Percentage of Assets-0.5-0.6-0.4-0.7-0.7-0.7-0.4-0.5-0.4-0.3-0.3-0.3-0.30.1-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-312008-12-31
Value2036120598209092113021376216342187422101223422257522852233992336023316233141437014637147331497015121152051518415178154601589616059163241653216671168741734317954182911869119079190521899918950189011885418236620061816094602045
Percentage of StockholdersEquity173.9182.2187.3154.4158.8162.8162.4161.6163.2166.7115.3102.6101.699.599.2110.9111.9110.7111.7108.8108.7108.2108.0108.5109.0108.8108.7100.5100.4100.5100.9107.499.499.198.994.393.591.890.885.884.264.264.163.463.60.0
Percentage of Assets34.535.035.233.833.333.833.834.134.634.832.531.931.431.230.828.428.731.631.832.332.332.031.931.732.532.432.632.632.933.033.534.534.334.835.334.934.533.333.733.233.328.328.00.026.70.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-312008-12-31
Value110511061097109710971098109010901090109010801081107910791069550550549547547546546544554563566569571571575584593604616626623622621619617602306305303299100
Percentage of StockholdersEquity9.49.89.88.08.18.38.18.08.08.05.44.74.74.64.64.24.24.14.13.93.93.93.93.93.93.83.83.53.43.43.43.53.33.33.23.13.13.03.02.82.83.23.23.23.20.0
Percentage of Assets1.91.91.81.81.71.71.71.71.71.71.51.51.51.41.41.11.11.21.21.21.21.11.11.11.11.11.11.11.11.11.11.11.11.11.21.11.11.11.11.11.11.41.40.01.30.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-312008-12-31
Value-7050.0-7556.0-8031.0-5743.0-6109.0-6486.0-6814.0-7018.0-7321.0-7693.0-1643.077710401336110334-51.0110-1.0791152132721778714114713113514466-173.011931244128515061688206723192663297132913302329832333146
Percentage of StockholdersEquity-60.2-66.8-71.9-42.0-45.4-48.8-50.6-51.3-53.5-56.8-8.33.44.55.74.70.3-0.40.8-0.00.60.81.51.91.20.61.01.00.80.80.90.4-1.06.56.66.77.58.310.011.112.113.734.134.234.334.20.0
Percentage of Assets-12.0-12.8-13.5-9.2-9.5-10.1-10.5-10.8-11.3-11.9-2.31.11.41.81.50.1-0.10.2-0.00.20.20.40.60.40.20.30.30.30.30.30.1-0.32.22.32.42.83.13.64.14.75.415.015.00.014.30.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value110511061097109710971098109010901090109010801081107910791069550550549547547546546544554563566569571571575584593604616626623622621619617602305304299
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.91.91.81.81.71.71.71.71.71.71.51.51.51.41.41.11.11.21.21.21.21.11.11.11.11.11.11.11.11.11.11.11.11.11.21.11.11.11.11.11.11.41.41.3

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2036120598209092113021376216342187422101223422257522852233992336023316233141437014637147331497015121152051518415178154601589616059163241653216671168741734317954182911869119079190521899918950189011885418236619461746014
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets34.535.035.233.833.333.833.834.134.634.832.531.931.431.230.828.428.731.631.832.332.332.031.931.732.532.432.632.632.933.033.534.534.334.835.334.934.533.333.733.233.328.328.026.7

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-7050.0-7556.0-8031.0-5743.0-6109.0-6486.0-6814.0-7018.0-7321.0-7693.0-1643.077710401336110334-51.0110-1.0791152132721778714114713113514466-173.0119312441285150616882067231926632958329133023232
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-12.0-12.8-13.5-9.2-9.5-10.1-10.5-10.8-11.3-11.9-2.31.11.41.81.50.1-0.10.2-0.00.20.20.40.60.40.20.30.30.30.30.30.1-0.32.22.32.42.83.13.64.14.75.415.015.014.3

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-2710000000.0-2845000000.0-2813000000.0-2795000000.0-2902000000.0-2955000000.0-2680000000.0-2499000000.0-2419000000.0-2429000000.0-2461000000.0-2454000000.0-2490000000.0-2288000000.0-1995000000.0-1994000000.0-2050000000.0-2086000000.0-2117000000.0-1855000000.0-1881000000.0-1907000000.0-1934000000.0-1941000000.0-1959000000.0-2001000000.0-2017000000.0-789000000.0-779000000.0-795000000.0-802000000.0-1660000000.0-1688000000.0-1695000000.0-1701000000.0-984000000.0-998000000.0-1000000000.0-1012000000.0-158000000.0-141000000.0-138960000.0-141150000.0-85306000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-4.6-4.8-4.7-4.5-4.5-4.6-4.1-3.9-3.7-3.7-3.5-3.3-3.3-3.1-2.6-3.9-4.0-4.5-4.5-4.0-4.0-4.0-4.1-4.0-4.0-4.0-4.0-1.6-1.5-1.6-1.5-3.2-3.2-3.2-3.1-1.8-1.8-1.8-1.8-0.3-0.3-0.6-0.6-0.4

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312011-06-302011-03-312010-06-302010-03-31
Value1639152516821794174912991909188817011182199617871582166711781348669419461
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.833.536.138.337.127.434.336.032.622.334.532.528.429.622.130.639.523.725.6

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312011-06-302011-03-312010-06-302010-03-31
Value-620000000.0-675000000.0-724000000.0-942000000.0-959000000.0-939000000.0-899000000.0-954000000.0-811000000.0-906000000.0-882000000.0-684000000.0-744000000.0-768000000.0-8021000000.0-153840000.0-208160000.0-191510000.0-168490000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-13.9-14.8-15.6-20.1-20.4-19.8-16.1-18.2-15.5-17.1-15.3-12.4-13.3-13.6-150.7-3.5-12.3-10.8-9.4

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312011-06-302011-03-312010-06-302010-03-31
Value-576.0-774.0-1078.0-2089.0-597.0-486.0-724.057-924.0-320.0-1016.0-1415.0-643.0-949.012661081-364.957-248.706-248.294
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-12.9-17.0-23.2-44.6-12.7-10.2-13.01.1-17.7-6.1-17.6-25.7-11.5-16.823.824.6-21.5-14.0-13.8

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value44376-120.0-1237.0193-126.0286991-34.0-44.098-312.0195-50.0-5577.0-193.06141-8.082-51.0
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.91.7-2.6-26.44.1-2.75.118.9-0.7-0.81.7-5.73.5-0.9-104.8-4.8150.1-0.21.9-1.2

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1481315195115105901061181263686277123-688.0-117.0-89.0-37.0-26.01110.011257401637-10.093102106424214116613412322115971321263911236-1.631-15.369
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1041115011951193116211601210123511961188126212851290128311979109498809589959879761053104810481040113110971093110711661135112311171220114412081208125512041198368364358357353
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-88.0-93.0-218.0-98.0-112.0-115.04.01.0-27.0-239.027522-159.0-14.0-30.019-31.0-81.057-22.0-4.078-84.028-32.0-80.091-96.0-48.0123-76.0-123.0157-34.0-120.018858-198.0-44.010.0-23.068-0.9326.932-6.0-36.008-59.992
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value41-45.0-149.03262-60.0-2.0-125.0137-5.0-33.04382-117.0-29.06945-116.010833151-26.0414024275239132-60.0107571434187282-18.03674-52.97144-158.225734314
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312011-06-302011-03-312010-06-302010-03-31
Value1639152516821794174912991909188817011182199617871582166711781348669419461
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.833.536.138.337.127.434.336.032.622.334.532.528.429.622.130.639.523.725.6

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value506475-2289.0366377314223302371-6165.0-2412.02722921151117921716342152196236338205143192188188193203239-1045.026929823327074200109140102211225232238252
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.410.4-49.27.88.06.64.05.87.1-116.6-41.74.95.22.021.02.30.43.91.03.54.55.47.64.53.24.34.24.24.34.55.3-23.15.96.65.15.91.64.32.33.02.312.413.113.313.414.0

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value393940424144464344443437-37.0-35.038-32.0-33.0
Percentage of NetIncomeLoss7.78.2-1.711.510.914.020.614.211.9-0.7-1.413.6-12.7-30.441.3-188.2-20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.90.90.90.90.90.80.80.80.80.60.7-0.7-0.60.9-0.8-0.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value16151515115.0
Percentage of NetIncomeLoss3.23.2-0.74.12.91.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.30.30.30.20.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value506475-2289.0366377314223302371-6165.0-2412.02722921151117921716342152196236338205143192188188193203239-1045.026929823327074200107153101211224232238252
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.098.2109.399.9100.099.9100.0100.2100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.410.4-49.27.88.06.64.05.87.1-116.6-41.74.95.22.021.02.30.43.91.03.54.55.47.64.53.24.34.24.24.34.55.3-23.15.96.65.15.91.64.32.33.32.312.413.013.313.514.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312011-03-312010-03-31
Value4220553120694838433342495441472122212020221816192018172023199.3887.101
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensation us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4220553120694838433342495441
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312011-06-302011-03-312010-06-302010-03-31
Value-620000000.0-675000000.0-724000000.0-942000000.0-959000000.0-939000000.0-899000000.0-954000000.0-811000000.0-906000000.0-882000000.0-684000000.0-744000000.0-768000000.0-8021000000.0-153840000.0-208160000.0-191510000.0-168490000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-13.9-14.8-15.6-20.1-20.4-19.8-16.1-18.2-15.5-17.1-15.3-12.4-13.3-13.6-150.7-3.5-12.3-10.8-9.4

Payments To Acquire Productive Assets

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:PaymentsToAcquireProductiveAssets


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value6467167589881009974940957800931915684771805743753830780971746653611833767656616934712731670837801
Percentage of PaymentsToAcquireProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312011-06-302011-03-312010-06-302010-03-31
Value-576.0-774.0-1078.0-2089.0-597.0-486.0-724.057-924.0-320.0-1016.0-1415.0-643.0-949.012661081-364.957-248.706-248.294
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-12.9-17.0-23.2-44.6-12.7-10.2-13.01.1-17.7-6.1-17.6-25.7-11.5-16.823.824.6-21.5-14.0-13.8

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value99089111048321188123727199880.00.00.00.00.013017900.066080.00.0946988227-1.03960.05940.04830.00.07410.0752988-1.02.013292032943557
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.00.0100.00.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1288117698126381208248826986996071533971416556835182149931269721439254312912038663841744784115196256
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value274294272275271291271275269285577579576580572291294296291290296290293296305304304308307309315325320341454452453452451448435221220221218218
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value3150278023971979346335663150358875108019-2990.554-2870.027
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value3487372839404757274029013774367947575222703696
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value147415381587401615171478111311327
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefits us-gaap:IncomeTaxAuthority

us-gaap:DomesticCountry


Unrecognized
Period End2020-12-312019-12-312018-12-31
Value485551835526
Percentage of UnrecognizedTaxBenefits329.4337.0348.2

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-07-152011-04-022010-12-312009-12-31
Value153813191331134137538040943528127610.02104241
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctl:CapitalizedContractCostIncurred us-gaap:CapitalizedContractCost

ctl:CapitalizedContractCostIncurred

ctl:ContractAcquisitionCosts


Capitalized
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value514536496048435774534737
Percentage of CapitalizedContractCostIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctl:ContractFulfillmentCosts


Capitalized
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value36353436394144344146296.0
Percentage of CapitalizedContractCostIncurred70.677.894.473.565.085.4102.359.655.486.861.716.2

ctl:IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization

ctl:IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization


Income
Period End2020-09-302019-09-30
Value21122223
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization100.0100.0

ctl:IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Income
Period End2020-09-302019-09-30
Value-1674.0-1717.0
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization-79.3-77.2

us-gaap:OperatingSegments


Income
Period End2020-12-312020-09-302019-12-312019-09-30
Value3766378639403940
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization0.0179.30.0177.2

ctl:IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ctl:Consumer


Income
Period End2020-09-302019-09-30
Value11441193
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization54.253.7

us-gaap:OperatingSegments, ctl:Enterprise


Income
Period End2020-09-302019-09-30
Value837845
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization39.638.0

us-gaap:OperatingSegments, ctl:InternationalandGlobalAccounts


Income
Period End2020-09-302019-09-30
Value548567
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization25.925.5

us-gaap:OperatingSegments, ctl:SmallandMediumBusiness


Income
Period End2020-09-302019-09-30
Value444467
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization21.021.0

us-gaap:OperatingSegments, ctl:Wholesale


Income
Period End2020-09-302019-09-30
Value813868
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization38.539.0

ctl:OperatingExpensesExcludingDepreciationAmortizationAndImpairment

ctl:OperatingExpensesExcludingDepreciationAmortizationAndImpairment


Operating
Period End2020-09-302019-09-30
Value30553127
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment100.0100.0

ctl:OperatingExpensesExcludingDepreciationAmortizationAndImpairment us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Operating
Period End2020-09-302019-09-30
Value16741717
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment54.854.9

us-gaap:OperatingSegments


Operating
Period End2020-09-302019-09-30
Value13811410
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment45.245.1

ctl:OperatingExpensesExcludingDepreciationAmortizationAndImpairment us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ctl:Consumer


Operating
Period End2020-09-302019-09-30
Value165172
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment5.45.5

us-gaap:OperatingSegments, ctl:Enterprise


Operating
Period End2020-09-302019-09-30
Value602583
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment19.718.6

us-gaap:OperatingSegments, ctl:InternationalandGlobalAccounts


Operating
Period End2020-09-302019-09-30
Value287299
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment9.49.6

us-gaap:OperatingSegments, ctl:SmallandMediumBusiness


Operating
Period End2020-09-302019-09-30
Value191207
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment6.36.6

us-gaap:OperatingSegments, ctl:Wholesale


Operating
Period End2020-09-302019-09-30
Value136149
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment4.54.8

ctl:OperatingLeaseLeaseIncomePercentOfOperatingRevenue

ctl:OperatingLeaseLeaseIncomePercentOfOperatingRevenue


Operating
Period End2020-09-302019-09-30
Value6.04.0
Percentage of OperatingLeaseLeaseIncomePercentOfOperatingRevenue100.0100.0

lumn:CapitalizedContractCostIncurred us-gaap:CapitalizedContractCost

lumn:CapitalizedContractCostIncurred

lumn:ContractAcquisitionCosts


Capitalized
Period End2021-06-302021-03-312020-06-302020-03-31
Value45443649
Percentage of CapitalizedContractCostIncurred100.0100.0100.0100.0

lumn:ContractFulfillmentCosts


Capitalized
Period End2021-06-302021-03-312020-06-302020-03-31
Value38373436
Percentage of CapitalizedContractCostIncurred84.484.194.473.5

lumn:DisposalGroupIncludingDiscontinuedOperationTransactionExpenses us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:SubsequentEventType

lumn:DisposalGroupIncludingDiscontinuedOperationTransactionExpenses

us-gaap:DiscontinuedOperationsDisposedOfBySale, lumn:LocalExchangeBusinessInMidwesternAndSouthernStates, us-gaap:SubsequentEvent


Disposal
Period End2021-08-03
Value245
Percentage of DisposalGroupIncludingDiscontinuedOperationTransactionExpenses100.0

lumn:GainLossOnExtinguishmentOfDebtOperatingActivities

lumn:GainLossOnExtinguishmentOfDebtOperatingActivities


Gain
Period End2021-06-302021-03-312020-06-302020-03-31
Value08000000.0-7000000.0-79000000.0
Percentage of GainLossOnExtinguishmentOfDebtOperatingActivities0.0100.0100.0100.0

lumn:IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization

lumn:IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value2089215720852209
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization100.0100.0100.0100.0

lumn:IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value-1486.0-1509.0-1662.0-1581.0
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization-71.1-70.0-79.7-71.6

us-gaap:OperatingSegments


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value3575366637473790
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization171.1170.0179.7171.6

lumn:IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lumn:BusinessSegment


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value2362240824642488
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization113.1111.6118.2112.6

us-gaap:OperatingSegments, lumn:MassMarketSegment


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value1213125812831302
Percentage of IncomeLossFromContinuingOperationsBeforeInterestIncomeTaxDepreciationAndAmortization58.158.361.558.9

lumn:OperatingExpensesExcludingDepreciationAmortizationAndImpairment

lumn:OperatingExpensesExcludingDepreciationAmortizationAndImpairment


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value2835287231073019
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment100.0100.0100.0100.0

lumn:OperatingExpensesExcludingDepreciationAmortizationAndImpairment us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value1486150916621581
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment52.452.553.552.4

us-gaap:OperatingSegments


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value1349136314451438
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment47.647.546.547.6

lumn:OperatingExpensesExcludingDepreciationAmortizationAndImpairment us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lumn:BusinessSegment


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value1160118712531249
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment40.941.340.341.4

us-gaap:OperatingSegments, lumn:MassMarketSegment


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value189176192189
Percentage of OperatingExpensesExcludingDepreciationAmortizationAndImpairment6.76.16.26.3

lumn:OperatingLeaseLeaseIncomePercentOfOperatingRevenue

lumn:OperatingLeaseLeaseIncomePercentOfOperatingRevenue


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value7.07.06.06.0
Percentage of OperatingLeaseLeaseIncomePercentOfOperatingRevenue100.0100.0100.0100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3.0391.04.02.0332.06.03.0266.01510.0254.01.01.0140.01.02.0121.01.02.0151.01.05.09.02.00.05.01117-2.08.0110.0150.0152.01.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0

us-gaap:CapitalizedContractCostAmortization us-gaap:CapitalizedContractCost

us-gaap:CapitalizedContractCostAmortization

ctl:ContractAcquisitionCosts


Capitalized
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value545356555350515047444137
Percentage of CapitalizedContractCostAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctl:ContractFulfillmentCosts


Capitalized
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value373735373432352327341810.0
Percentage of CapitalizedContractCostAmortization68.569.862.567.364.264.068.646.057.477.343.927.0

lumn:ContractAcquisitionCosts


Capitalized
Period End2021-06-302021-03-312020-06-302020-03-31
Value53545655
Percentage of CapitalizedContractCostAmortization0.00.0100.0100.0

lumn:ContractFulfillmentCosts


Capitalized
Period End2021-06-302021-03-312020-06-302020-03-31
Value37373537
Percentage of CapitalizedContractCostAmortization0.00.062.567.3

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths us-gaap:DerivativeInstrumentRisk

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths

us-gaap:InterestRateSwap


Cash
Period End2021-06-302021-03-312020-12-31
Value14000000.0-81000000.0-1000000.0
Percentage of CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths100.0100.0100.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:ConcentrationRiskPercentage1

lumn:WorkforceSubjecttoCollectiveBargainingArrangementsExpired, us-gaap:UnionizedEmployeesConcentrationRisk


Concentration
Period End2021-03-31
Value4.0
Percentage of ConcentrationRiskPercentage1100.0

us-gaap:NumberOfEmployeesTotal, us-gaap:UnionizedEmployeesConcentrationRisk


Concentration
Period End2021-03-312020-03-312019-09-302019-03-312017-03-31
Value23.00.240.730.260.37
Percentage of ConcentrationRiskPercentage1575.00.00.00.00.0

us-gaap:WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYear, us-gaap:UnionizedEmployeesConcentrationRisk


Concentration
Period End2021-03-312020-03-312019-03-31
Value10.00.090.06
Percentage of ConcentrationRiskPercentage1250.00.00.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value58425605859495494744490-334.05650523
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-49000000.0-49000000.0-50000000.0-52000000.0-50000000.0-56000000.0-54000000.0-56000000.0-57000000.0-43000000.0-45000000.0-46000000.0-44000000.0-51000000.0-51000000.0-52000000.0-51000000.0-44000000.0-44000000.0-45000000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value4.04.04.04.04.04.03.05.04.04.05.05.05.05.05.05.05.05.05.05.05.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-3.0-2.0-3.0-1.0-3.0-2.0-2.0-2.0-2.0-2.0-2.0-2.0-2.0-2.0-2.0-2.0-2.0-2.0-2.0-2.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit-75.0-50.0-75.0-25.0-75.0-66.7-40.0-50.0-50.0-40.0-40.0-40.0-40.0-40.0-40.0-40.0-40.0-40.0-40.0-40.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value138138147149149154155153156172171171173167166167166182183183
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value111212172020282728272424252425252525272927
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value495081818082110109107110969998100103102105101106107107
Percentage of DefinedBenefitPlanInterestCost445.5416.7675.0476.5400.0410.0392.9403.7382.1407.4400.0412.5392.0416.7412.0408.0420.0404.0392.6369.0396.3

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value192119322728343536353432353334343434393635
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-28.0-28.0-4.0-5.0-4.030202223-3.0-12.0-13.0-15.01.01.02.01.0-5.0-18.0-18.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-147.4-133.3-12.5-18.5-14.388.257.161.165.7-8.8-37.5-37.1-45.52.92.95.92.9-12.8-50.0-51.4

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312020-09-30
Value-1000000.0-7000000.0
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments100.0100.0

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3.04.03.04.03.04.04.03.04.04.05.04.05.04.05.04.05.04.05.04.05.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value151315151316141414141717161616161417161615
Percentage of DefinedBenefitPlanServiceCost500.0325.0500.0375.0433.3400.0350.0466.7350.0350.0340.0425.0320.0400.0320.0400.0280.0425.0320.0400.0300.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1041115011951193116211601210123511961188126212851290128311979109498809589959879761053104810481040113110971093110711661135112311171220114412081208125512251198368364358358353
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization us-gaap:ConsolidationItems

us-gaap:MaterialReconcilingItems


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value104111501195119311621160121012351196118812621285129012831197910949880958995987976105310481048-1040.0113110971093110711661135
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock

us-gaap:DividendsCommonStock


Dividends
Period End2020-11-192020-08-202020-05-202020-02-272019-11-212019-08-222019-05-232019-03-012018-11-142018-08-212018-05-232018-02-212017-11-142017-08-222017-05-242017-02-212016-11-152016-08-232016-05-182016-02-232015-11-102015-08-252015-05-202015-02-232014-11-112014-08-192014-05-282014-02-242013-11-122013-08-272013-05-232013-02-262012-11-132012-08-212012-05-242012-02-122011-11-152011-11-302011-08-232011-08-312011-05-182011-05-312011-01-242011-01-312010-11-302010-08-302010-05-312010-02-28
Value274274274274273273274273586584588586577296297295294295294295293300303303307308307309320321320339454452453452449449449449436436222222220220220219
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value2782922752752762862882722722725860.00.00.05292891192401731060.00.051184106105
Percentage of DividendsCommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ExtinguishmentOfDebtAmount dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:ExtinguishmentOfDebt

us-gaap:ExtinguishmentOfDebtAmount

ctl:QwestCorporation, ctl:A6625SeniorNotes, us-gaap:SeniorNotes


Extinguishment
Period End2020-10-26
Value160
Percentage of ExtinguishmentOfDebtAmount100.0

lumn:LumenTechnologiesInc, lumn:A6450SeniorNotesSeriesSDue2021, us-gaap:SeniorNotes


Extinguishment
Period End2021-06-15
Value1200
Percentage of ExtinguishmentOfDebtAmount0.0

us-gaap:ExtinguishmentOfDebtAmount dei:LegalEntity, us-gaap:LongtermDebtType

lumn:Level3FinancingInc., us-gaap:SeniorNotes


Extinguishment
Period End2021-01-13
Value900
Percentage of ExtinguishmentOfDebtAmount0.0

us-gaap:FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation

us-gaap:FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value00-1000000.0-1000000.0
Percentage of FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation0.00.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation us-gaap:StatementBusinessSegments

ctl:Business


Financing
Period End2020-09-302020-06-302020-03-31
Value0-1000000.0-1000000.0
Percentage of FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation0.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value1411119.09.013
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery us-gaap:StatementBusinessSegments

ctl:Business


Financing
Period End2020-09-302020-06-302020-03-31
Value7.05.06.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery77.855.646.2

ctl:Consumer


Financing
Period End2020-09-302020-06-302020-03-31
Value2.04.07.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery22.244.453.8

lumn:BusinessSegment


Financing
Period End2021-06-302021-03-31
Value3.05.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery21.445.5

lumn:MassMarketSegment


Financing
Period End2021-06-302021-03-31
Value116.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery78.654.5

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value506728243843
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs us-gaap:StatementBusinessSegments

ctl:Business


Financing
Period End2020-09-302020-06-302020-03-31
Value161819
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs66.747.444.2

ctl:Consumer


Financing
Period End2020-09-302020-06-302020-03-31
Value8.02024
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs33.352.655.8

lumn:BusinessSegment


Financing
Period End2021-06-302021-03-31
Value1619
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs32.028.4

lumn:MassMarketSegment


Financing
Period End2021-06-302021-03-31
Value3448
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs68.071.6

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value13-16.0367.0-4.0-61.027-20.01.01.0-116.0-8.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss us-gaap:StatementBusinessSegments

ctl:InternationalandGlobalAccounts


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3614-4.0-61.027-20.01.01.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0200.0100.0100.0100.0100.0100.0100.0

ctl:SmallandMediumBusiness


Goodwill
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0-7.00.00.00.00.00.00.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss0.0-100.0-0.0-0.00.0-0.00.00.0

lumn:BusinessSegment


Goodwill
Period End2021-06-302021-03-31
Value13-16.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0

us-gaap:GoodwillImpairmentLoss

us-gaap:GoodwillImpairmentLoss


Goodwill
Period End2020-10-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-10-312018-12-312018-09-302018-06-302018-03-312014-12-312014-09-302013-12-312013-09-302012-12-312012-09-30
Value26000.00.00.00.00.06506270027000.00.00.00.00.00.011000.00.0
Percentage of GoodwillImpairmentLoss100.00.00.00.00.00.0100.0100.0100.00.00.00.00.00.00.0100.00.00.0

us-gaap:IncreaseDecreaseInAccruedTaxesPayable

us-gaap:IncreaseDecreaseInAccruedTaxesPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-60.031-63.09313-16.0-111.0111-25.045-142.0364-167.020-49.074-177.0206-44.0-207.048160-218.0130-16.0136-122.049-76.065-2.041-87.076-79.043-58.080-49.013-29.096-57.0-20.0
Percentage of IncreaseDecreaseInAccruedTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet

us-gaap:IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-64.0272-146.0205-163.0366-291.090-103.0336-169.0-234.014262393-85.040266-116.0-40.0-8.072176-173.03416140-226.06129540-466.012637118-140.0162-156.0119-21.010.0-32.0120-17.0
Percentage of IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet

us-gaap:IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-54.0-66.041-236.0-65.014-173.0-5.0-71.04.0-5.076-255.0-145.0120-38.0104-12.0-23.06.00.03524431.010.0-33.00.0-63.0-3.042-13.0-34.0-14.0-70.0-38.0-6.0-47.027-31.0-5.0151.0-5.0
Percentage of IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPensionAndPostretirementObligations

us-gaap:IncreaseDecreaseInPensionAndPostretirementObligations


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-60000000.0-71000000.0-15000000.0-34000000.0-37000000.0-25000000.012000000.0-16000000.06000000.0-14000000.0-28000000.0-444000000.0-146000000.0-49000000.0-21000000.0-125000000.0-31000000.0-25000000.0-9000000.0-115000000.0-7000000.0-21000000.0-7000000.0-115000000.0-10000000.0-9000000.071000000.0-153000000.0-74000000.0-28000000.0-54000000.0-68000000.0-42000000.0-178000000.010000000.0-16000000.0-88000000.0-75000000.0-518000000.0-41000000.0-19385000.0-109620000.0-10308000.019000000.04807000.0-284810000.0
Percentage of IncreaseDecreaseInPensionAndPostretirementObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities


Incremental
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value10000.010000.010000.010000.010000.010000.0010000.010000.010000.0010000.010000.010000.00010000.010000.0-1000.013000.013000.013000.0013000.013000.013000.0013000.013000.0
Percentage of IncrementalCommonSharesAttributableToConversionOfDebtSecurities100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value6939000.09102000.05151000.03082000.06285000.02237000.024000.0249000.0570000.01526000.0136000.01457000.01107000.0911000.0001290000.01641000.01000.02315000.01939000.02129000.0197000.01396000.01362000.0634000.073000.0671000.0534000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaidCapitalized

us-gaap:InterestPaidCapitalized


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value131315172023221817151114131517202120161412121112161313121210.011129.09.010.012129.08.07.07.03.03.03.0
Percentage of InterestPaidCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LitigationSettlementAmountAwardedToOtherParty us-gaap:LitigationCase, us-gaap:LitigationStatus

us-gaap:LitigationSettlementAmountAwardedToOtherParty

lumn:ColumbiaAndJoplinMunicipalities, us-gaap:JudicialRuling


Litigation
Period End2021-06-30
Value55
Percentage of LitigationSettlementAmountAwardedToOtherParty100.0

us-gaap:LitigationSettlementAmountAwardedToOtherParty us-gaap:LitigationCase, us-gaap:StatutoryAccountingPracticesByJurisdiction

lumn:MinnesotaSecuritiesInvestorClassActions, lumn:U.S.DistrictCourtfortheDistrictofMinnesota


Litigation
Period End2021-03-31
Value55
Percentage of LitigationSettlementAmountAwardedToOtherParty0.0

us-gaap:LitigationSettlementAmountAwardedToOtherParty us-gaap:StatutoryAccountingPracticesByJurisdiction

ctl:U.S.DistrictCourtfortheDistrictofMinnesota


Litigation
Period End2020-09-302020-06-302020-03-312019-09-302019-06-30
Value0.00.0150.015
Percentage of LitigationSettlementAmountAwardedToOtherParty0.00.00.00.00.0

us-gaap:LossContingencyDamagesSoughtValue dei:LegalEntity

us-gaap:LossContingencyDamagesSoughtValue

ctl:Level3ParentLLC


Loss
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.00.00.0500.00.0
Percentage of LossContingencyDamagesSoughtValue0.00.00.0100.00.00.0

lumn:Level3ParentLLC


Loss
Period End2021-06-302021-03-31
Value0.050
Percentage of LossContingencyDamagesSoughtValue0.00.0

us-gaap:LossContingencyNumberOfPlaintiffs

us-gaap:LossContingencyNumberOfPlaintiffs


Loss
Period End2021-06-302021-03-31
Value012000.0
Percentage of LossContingencyNumberOfPlaintiffs0.0100.0

us-gaap:LossContingencyNumberOfPlaintiffs us-gaap:StatutoryAccountingPracticesByJurisdiction

ctl:U.S.DistrictCourtfortheDistrictofMinnesota


Loss
Period End2020-12-31
Value-1000.0
Percentage of LossContingencyNumberOfPlaintiffs0.0

lumn:U.S.DistrictCourtfortheDistrictofMinnesota


Loss
Period End2021-06-302021-03-31
Value011000.0
Percentage of LossContingencyNumberOfPlaintiffs0.091.7

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent


Oci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value80-86.0-73.0501.0-319.0-227.0-123.0-34.0-12.0-41.0-1.0-239.079-36.0184.0-2.0-287.0-4.0-4.0-1.0-22.0-10.011-11.0-1277.0-16.0
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Oci
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.01.0-8.0-80.013-11.0-26.0-17.0
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent-1.42.0-800.025.1-5.78.976.5141.7

us-gaap:AccumulatedTranslationAdjustment


Oci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value80-86.0144499.0-239.0117-112.0-8.05.0-40.0-1.0-239.07911184.0-2.0-13.0-4.0-4.0-1.0-4.0-10.011-11.0-8.0-16.0
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent100.0100.0-197.398.0900.074.9-51.591.123.5-41.797.6100.0100.0100.0-30.6100.0100.0100.04.5100.0100.0100.018.2100.0100.0100.00.6100.0

us-gaap:OperatingLeaseLeaseIncome

us-gaap:OperatingLeaseLeaseIncome


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value327332302332333333794202205199189221253219
Percentage of OperatingLeaseLeaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax

us-gaap:OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax


Other
Period End2020-12-312020-09-30
Value0-1000000.0
Percentage of OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax0.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value1.01.0291.02.01.08.02.02.01.02.03.02.02.02.02.02.02.02.02.04.04.04.03.05.03.01.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value0.01.0110.01.00.02.01.00.01.01.00.0-1.0-1.01.01.01.0-1.01.01.0-1.0-1.03.03.0-2.0-2.03.0-2.00.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax0.0100.0100.00.0100.00.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1000000.01000000.0-8000000.0-80000000.015000000.0-11000000.0-26000000.0-17000000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1000000.00-2000000.0-26000000.05000000.0-3000000.0-8000000.0-6000000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:InterestRateSwap, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value01000000.0-10000000.0-106000000.018000000.0-14000000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax0.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-16000000.0-15000000.0-15000000.0-15000000.0-11000000.0-5000000.000
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:InterestRateSwap, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-30
Value-21000000.0-20000000.0-21000000.0-20000000.0-16000000.0-5000000.00
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax131.2133.3140.0133.3145.5100.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value-5000000.0-5000000.0-6000000.0-5000000.0-5000000.00
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax100.0100.0100.0100.0100.00.0

us-gaap:OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax

us-gaap:OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax


Other
Period End2020-12-312020-09-30
Value0-3000000.0
Percentage of OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax0.0100.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value4.0-7.041214.0-23.030-22.0-3.01.0211.0-44.014170.00.00.00.00.00.00.00.00.00.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value135-32.0-18.010753-275.0-181.0-80.010.032-7.036-202.0114-1.0563631-262.02626277.0184216-1228.0-10.0167.0858277.06.0-717.0142.012-854.0-17.0-2.02.0-52.02.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3.04.0-100.06.03.03.0-135.03.03.03.01975.03.04.0-83.04.03.03.08.04.03.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent2.2-12.5555.65.65.7-1.174.6-3.830.09.4-2814.313.9-1.53.58300.07.18.39.7-3.115.411.5

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3635-78.0363836-178.0404141-164.032343171342930-258.02627
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent26.7-109.4433.333.671.7-13.198.3-50.0410.0128.12342.988.9-16.827.2-7100.060.780.696.898.5100.0103.8

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value161516163.0-75.015-11.0-26.0-17.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent11.9-46.9-88.915.05.727.3-8.313.8-260.0-53.1

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-312010-12-31
Value135-32.0-18.010753-275.0-181.0-80.010.032-7.036-203.0114-1.0563631-262.02626277.0184216-1228.0-10.0167.0858287.06.0-717.0142.012-854.02.0-52.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.5100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0103.7100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedTranslationAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value80-86.0144499.0-239.0117-112.0-8.05.0-40.0-1.0-239.07911184.0-2.0-12.0-4.0-4.0-1.0-4.0-10.011-11.0-7.0-16.08.01.03.013-5.0-8.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent59.3268.8-800.045.817.086.9-64.6140.0-80.015.6571.4-2.8118.369.3-1100.032.111.1-6.54.6-15.4-15.4-3.7-57.1-55.626.2-68.80.6160.050.014.30.348.1-71.4-133.3

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value-38.0-38.0207-38.0-39.0-38.0321-41.0-42.0-43.0-31.0-34.0-35.0-33.0-36.0-30.0-31.0-28.0-28.0-26.0-24.0-27.0-23.0-3.0-3.0-3.0-13.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value-12.0-12.063-12.0-13.0-12.0101-13.0-14.0-14.0-12.0-11.01111-3.0-15.0-22.0-20.0162-16.0-17.0-16.01615-15.0-2.02.0-2.0-8.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCostAndExpenseOperating us-gaap:ConsolidationItems

us-gaap:OtherCostAndExpenseOperating

us-gaap:MaterialReconcilingItems


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1486150916831674169916191877175717771805606670752686784440605492
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNonoperatingIncome us-gaap:ConsolidationItems

us-gaap:OtherNonoperatingIncome

us-gaap:MaterialReconcilingItems


Other
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value987888903980847950976-5499.0-1841.0894767750
Percentage of OtherNonoperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingActivitiesCashFlowStatement


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value7.024-9.0110-15.011-50.0342.0-2.0
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value5.0-6.00.0-11.0-2.025120.00.00.0610.0-5.05.03.0-3.04.0-2.01.01.0-4.00.04.08.00.0-18.05.013394.0-19.0-4.0-10.0-31.018-15.0-2.0-5.0-14.1715.171-2.7160.0-0.342-1.658
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.00.0100.0100.0100.0100.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:PaymentsForRestructuring us-gaap:RestructuringCostAndReserve

us-gaap:PaymentsForRestructuring

us-gaap:EmployeeSeverance


Payments
Period End2021-06-302021-03-312020-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302014-06-302014-03-31
Value2625161430604710.09.01574597.0111215173511
Percentage of PaymentsForRestructuring100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfDebt dei:LegalEntity, us-gaap:LineOfCreditFacility, us-gaap:LongtermDebtType

us-gaap:ProceedsFromIssuanceOfDebt

ctl:QwestCorporation, ctl:CoBankACB, ctl:VariableRateTermLoan


Proceeds
Period End2020-10-23
Value215
Percentage of ProceedsFromIssuanceOfDebt100.0

us-gaap:ProceedsFromIssuanceOfDebt dei:LegalEntity, us-gaap:LineOfCreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ctl:QwestCorporation, ctl:CoBankACB, ctl:VariableRateTermLoan, us-gaap:SubsequentEvent


Proceeds
Period End2020-10-23
Value215
Percentage of ProceedsFromIssuanceOfDebt100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-4.0-45.0-4.0-8.0-6.0-69.0-24.0-7.0-3.0-27.0-2.0-12.0-10.0-26.0130.00.00.00.00.00.00.0-1.0-1.00.0-3.01.00.018-12.07.04.03.045-20.0-35.01.0-7.0085.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit


Proceeds
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-03-31
Value0.0-150.00.0-300.01125-450.050-45.0145-40.05900.0-405.04055.0
Percentage of ProceedsFromRepaymentsOfLinesOfCredit0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProceedsFromSaleOfProductiveAssets


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value31353435493539281.025330.01223.014783.03.0458.0114.07.02.03.01214630.0-1.01.05.00.00.075580.0
Percentage of ProceedsFromSaleOfProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.0100.0100.00.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2627524755352931394634363647494931474848504649444242494733304146382743414756593341202425
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:ProvisionForLoanLossesExpensed


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value262752475535
Percentage of ProvisionForLoanLossesExpensed100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed us-gaap:StatementBusinessSegments

ctl:Business


Provision
Period End2020-09-302020-06-302020-03-31
Value283618
Percentage of ProvisionForLoanLossesExpensed59.665.551.4

ctl:Consumer


Provision
Period End2020-09-302020-06-302020-03-31
Value191917
Percentage of ProvisionForLoanLossesExpensed40.434.548.6

lumn:BusinessSegment


Provision
Period End2021-06-302021-03-31
Value8.013
Percentage of ProvisionForLoanLossesExpensed30.848.1

lumn:MassMarketSegment


Provision
Period End2021-06-302021-03-31
Value1814
Percentage of ProvisionForLoanLossesExpensed69.251.9

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-55.0-54.0-55.0-57.0-52.0-44.0-46.0-43.0-44.0-44.0-34.0-37.0-37.0-35.0-35.0-38.0-32.0-33.0-25.0-30.0-30.0-28.0-29.0-28.0-31.0-27.0-49.0-6.0
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-3.0-4.0-3.0-6.0-3.0-3.0-3.0-3.0-3.0-3.0-3.0-5.0-3.0-4.0-3.0-4.0-3.0-3.0-2.0-4.0-3.0
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent5.57.45.510.55.86.86.57.06.86.88.813.58.111.48.610.59.49.18.013.310.0

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-36.0-35.0-37.0-36.0-38.0-36.0-41.0-40.0-41.0-41.0-31.0-32.0-34.0-31.0-32.0-34.0-29.0-30.0-22.0-26.0-27.0
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent65.564.867.363.273.181.889.193.093.293.291.286.591.988.691.489.590.690.988.086.790.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-16.0-15.0-15.0-15.0-11.0-5.0-2.00.00.00.0
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent29.127.827.326.321.211.44.3-0.0-0.0-0.0

us-gaap:RepaymentsOfDebt

us-gaap:RepaymentsOfDebt


Repayments
Period End2021-03-312020-03-312018-09-302013-03-312012-03-312011-03-31
Value130024001300568493.0
Percentage of RepaymentsOfDebt100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfDebt dei:LegalEntity, us-gaap:CreditFacility, us-gaap:ExtinguishmentOfDebt

lumn:LumenTechnologiesInc, us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Repayments
Period End2021-03-31
Value150
Percentage of RepaymentsOfDebt11.5

us-gaap:RepaymentsOfDebt dei:LegalEntity, us-gaap:ExtinguishmentOfDebt

lumn:Level3FinancingInc., us-gaap:SeniorNotes


Repayments
Period End2021-03-31
Value900
Percentage of RepaymentsOfDebt69.2

lumn:QwestCorporation, us-gaap:SeniorNotes


Repayments
Period End2021-03-31
Value235
Percentage of RepaymentsOfDebt18.1

us-gaap:RestructuringCharges us-gaap:RestructuringCostAndReserve

us-gaap:RestructuringCharges

us-gaap:EmployeeSeverance


Restructuring
Period End2020-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value897915664523131.05.01483.07.015221469-18.0-14.012
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueNotFromContractWithCustomer

us-gaap:RevenueNotFromContractWithCustomer


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value471474472481481481884355356358591312325
Percentage of RevenueNotFromContractWithCustomer100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueNotFromContractWithCustomer us-gaap:ConsolidationItems, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value102999295
Percentage of RevenueNotFromContractWithCustomer21.720.919.119.8

us-gaap:OperatingSegments, lumn:LargeEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value28303627
Percentage of RevenueNotFromContractWithCustomer5.96.37.55.6

us-gaap:OperatingSegments, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value12117.013
Percentage of RevenueNotFromContractWithCustomer2.52.31.52.7

us-gaap:OperatingSegments, lumn:Wholesale, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value131134134138
Percentage of RevenueNotFromContractWithCustomer27.828.327.928.7

us-gaap:RevenueNotFromContractWithCustomer us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:ContractWithCustomerSalesChannel, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value70696469
Percentage of RevenueNotFromContractWithCustomer14.914.613.314.3

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:LargeEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value16152217
Percentage of RevenueNotFromContractWithCustomer3.43.24.63.5

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value8.08.03.08.0
Percentage of RevenueNotFromContractWithCustomer1.71.70.61.7

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:Wholesale, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value41403940
Percentage of RevenueNotFromContractWithCustomer8.78.48.18.3

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:InternationalandGlobalAccounts, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value32302826
Percentage of RevenueNotFromContractWithCustomer6.86.35.85.4

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:LargeEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value12151310.0
Percentage of RevenueNotFromContractWithCustomer2.53.22.72.1

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value2.02.03.04.0
Percentage of RevenueNotFromContractWithCustomer0.40.40.60.8

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:Wholesale, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value28313030
Percentage of RevenueNotFromContractWithCustomer5.96.56.26.2

us-gaap:OperatingSegments, lumn:IPDataServices, lumn:MidMarketEnterprise, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value2.01.01.01.0
Percentage of RevenueNotFromContractWithCustomer0.40.20.20.2

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:Wholesale, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value62636568
Percentage of RevenueNotFromContractWithCustomer13.213.313.514.1

us-gaap:RevenueNotFromContractWithCustomer us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lumn:CAFII, lumn:MassMarketSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value122123123123
Percentage of RevenueNotFromContractWithCustomer25.925.925.625.6

us-gaap:OperatingSegments, lumn:ComputeAndApplicationServices, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value135132128134
Percentage of RevenueNotFromContractWithCustomer28.727.826.627.9

us-gaap:OperatingSegments, lumn:ConsumerBroadband, lumn:MassMarketSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value53525553
Percentage of RevenueNotFromContractWithCustomer11.311.011.411.0

us-gaap:OperatingSegments, lumn:FiberInfrastructureServices, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value74787470
Percentage of RevenueNotFromContractWithCustomer15.716.515.414.6

us-gaap:OperatingSegments, lumn:IPDataServices, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value2.01.02.01.0
Percentage of RevenueNotFromContractWithCustomer0.40.20.40.2

us-gaap:OperatingSegments, lumn:SBGBroadband, lumn:MassMarketSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value4.04.05.03.0
Percentage of RevenueNotFromContractWithCustomer0.80.81.00.6

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value62636568
Percentage of RevenueNotFromContractWithCustomer13.213.313.514.1

us-gaap:OperatingSegments, lumn:VoiceAndOther, lumn:MassMarketSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value19212929
Percentage of RevenueNotFromContractWithCustomer4.04.46.06.0

us-gaap:RevenueNotFromContractWithCustomer us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, lumn:BusinessSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value273274269273
Percentage of RevenueNotFromContractWithCustomer58.057.855.956.8

us-gaap:OperatingSegments, lumn:MassMarketSegment


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value198200212208
Percentage of RevenueNotFromContractWithCustomer42.042.244.143.2

us-gaap:StockIssuedDuringPeriodValueOther us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueOther

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-1.09.00.00.0-1.08.00.00.00.010.0-1.02.00.010.02.00.01.02.00.01.00.02.00.01.0
Percentage of StockIssuedDuringPeriodValueOther100.0100.00.00.0100.0100.00.00.00.0100.0100.0100.00.0100.0100.00.0100.0100.00.0100.00.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value4420553320794838443445485733202123152021221619182317
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockholdersEquityOther us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityOther

us-gaap:RetainedEarnings


Stockholders
Period End2020-09-302020-06-302020-03-312019-09-302019-06-30
Value00-5000000.0-1000000.0-1000000.0
Percentage of StockholdersEquityOther0.00.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfSharesIssuedBasic

us-gaap:WeightedAverageNumberOfSharesIssuedBasic


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value110511000.2671097109710920.5011090-4.131559563566-0.913570572578-5.1385986076220.769622621619276136003050.763301300
Percentage of WeightedAverageNumberOfSharesIssuedBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfSharesRestrictedStock

us-gaap:WeightedAverageNumberOfSharesRestrictedStock


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1817-0.191161817-0.019180.0935.0944.8554.7180.1244.584.3253.6620.0743.7633.4533.0995.378-2.541-2.66-2.544-20.038-1.989-1.922-2.009-0.149-1.882-1.591
Percentage of WeightedAverageNumberOfSharesRestrictedStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctl:CostOfDebtAfterTaxPercentage

ctl:CostOfDebtAfterTaxPercentage


Cost
Period End2020-10-312019-10-31
Value2.54.4
Percentage of CostOfDebtAfterTaxPercentage100.0100.0

ctl:CostOfDebtAfterTaxPercentage us-gaap:ReportingUnit

srt:AsiaPacific


Cost
Period End2020-10-312019-10-31
Value3.97.1
Percentage of CostOfDebtAfterTaxPercentage156.0161.4

srt:LatinAmerica


Cost
Period End2020-10-312019-10-31
Value6.96.1
Percentage of CostOfDebtAfterTaxPercentage276.0138.6

us-gaap:EMEA


Cost
Period End2020-10-312019-10-31
Value2.94.8
Percentage of CostOfDebtAfterTaxPercentage116.0109.1

ctl:CostOfEquityPercentage

ctl:CostOfEquityPercentage


Cost
Period End2020-10-312019-10-31
Value10.77.6
Percentage of CostOfEquityPercentage100.0100.0

ctl:CostOfEquityPercentage us-gaap:ReportingUnit

srt:AsiaPacific


Cost
Period End2020-10-312019-10-31
Value14.010.2
Percentage of CostOfEquityPercentage130.8134.2

srt:LatinAmerica


Cost
Period End2020-10-312019-10-31
Value18.812.5
Percentage of CostOfEquityPercentage175.7164.5

us-gaap:EMEA


Cost
Period End2020-10-312019-10-31
Value11.28.1
Percentage of CostOfEquityPercentage104.7106.6

ctl:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeDeferredIncomeTaxBenefitExpense us-gaap:RetirementPlanType

ctl:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeDeferredIncomeTaxBenefitExpense

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value-90.0-62.0-22.0-122.0-102.0-114.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeDeferredIncomeTaxBenefitExpense100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value-755.0-770.0-754.0-1107.0-1191.0-1070.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeDeferredIncomeTaxBenefitExpense838.91241.93427.3907.41167.6938.6

ctl:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossCurtailmentGainLossBeforeTax us-gaap:RetirementPlanType

ctl:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossCurtailmentGainLossBeforeTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-31
Value-4000000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossCurtailmentGainLossBeforeTax100.0

ctl:DefinedBenefitPlanExpectedFutureBenefitPaymentNextTwelveMonthsNetofDirectSubsidies

ctl:DefinedBenefitPlanExpectedFutureBenefitPaymentNextTwelveMonthsNetofDirectSubsidies


Defined
Period End2020-12-31
Value233
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentNextTwelveMonthsNetofDirectSubsidies100.0

ctl:DefinedBenefitPlanHealthCareCostTrendRate us-gaap:Range, us-gaap:RetirementPlanType

ctl:DefinedBenefitPlanHealthCareCostTrendRate

srt:Maximum, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value6.50.0650.070.070.0525
Percentage of DefinedBenefitPlanHealthCareCostTrendRate100.0100.0100.0100.0100.0

srt:Minimum, us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value5.00.050.050.050.05
Percentage of DefinedBenefitPlanHealthCareCostTrendRate76.976.971.471.495.2

ctl:FinanceLeaseAndOtherObligations

ctl:FinanceLeaseAndOtherObligations


Finance
Period End2020-12-312020-09-302019-12-31
Value295292222
Percentage of FinanceLeaseAndOtherObligations100.0100.0100.0

ctl:GoodwillControlPremiumPercent

ctl:GoodwillControlPremiumPercent


Goodwill
Period End2020-10-312019-10-312019-03-312019-01-312019-01-012018-10-31
Value33.00.4470.0410.0410.0450.001
Percentage of GoodwillControlPremiumPercent100.0100.0100.0100.0100.0100.0

ctl:GoodwillImpairmentMeasurementInput us-gaap:Range, us-gaap:MeasurementInputType

ctl:GoodwillImpairmentMeasurementInput

srt:Maximum, us-gaap:MeasurementInputEbitdaMultiple


Goodwill
Period End2020-10-312019-10-312019-03-31
Value12.512.29.8
Percentage of GoodwillImpairmentMeasurementInput100.0100.0100.0

srt:Maximum, us-gaap:MeasurementInputRevenueMultiple


Goodwill
Period End2020-10-312019-10-312019-03-31
Value5.55.44.9
Percentage of GoodwillImpairmentMeasurementInput44.044.350.0

srt:Minimum, us-gaap:MeasurementInputEbitdaMultiple


Goodwill
Period End2020-10-312019-10-312019-03-31
Value4.85.64.9
Percentage of GoodwillImpairmentMeasurementInput38.445.950.0

srt:Minimum, us-gaap:MeasurementInputRevenueMultiple


Goodwill
Period End2020-10-312019-10-312019-03-31
Value2.02.32.1
Percentage of GoodwillImpairmentMeasurementInput16.018.921.4

ctl:GoodwillImpairmentPercent us-gaap:ReportingUnit

ctl:GoodwillImpairmentPercent

ctl:Enterprise


Goodwill
Period End2020-10-312019-10-312018-10-31
Value2.00.530.11
Percentage of GoodwillImpairmentPercent100.0100.0100.0

ctl:NorthAmericaGlobalAccounts


Goodwill
Period End2020-10-312019-10-31
Value46.00.55
Percentage of GoodwillImpairmentPercent2300.0103.8

srt:AsiaPacific


Goodwill
Period End2020-10-312019-10-31
Value23.00.38
Percentage of GoodwillImpairmentPercent1150.071.7

srt:LatinAmerica


Goodwill
Period End2020-10-312019-10-31
Value74.00.63
Percentage of GoodwillImpairmentPercent3700.0118.9

ctl:IntangibleAssetsGrossIncludingGoodwill

ctl:IntangibleAssetsGrossIncludingGoodwill


Intangible
Period End2020-12-312020-09-30
Value4150044100
Percentage of IntangibleAssetsGrossIncludingGoodwill100.0100.0

ctl:IntangibleAssetsNetIncludingGoodwillAndOtherAssetsNoncurrent

ctl:IntangibleAssetsNetIncludingGoodwillAndOtherAssetsNoncurrent


Intangible
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value298803280533234334103389534265347703517540028430894340143784445653020830434246182481626228264332662826885273362758327869281382830528581289252923429507308293102931375317863218933083
Percentage of IntangibleAssetsNetIncludingGoodwillAndOtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctl:LeaseLiability

ctl:LeaseLiability


Lease
Period End2020-12-312019-12-31
Value20771978
Percentage of LeaseLiability100.0100.0

ctl:LeaseRightofUseAsset

ctl:LeaseRightofUseAsset


Lease
Period End2020-12-312019-12-31
Value20281938
Percentage of LeaseRightofUseAsset100.0100.0

ctl:LongTermDebtMaturityYearFiveAndThereafter

ctl:LongTermDebtMaturityYearFiveAndThereafter


Long
Period End2020-09-30
Value25903
Percentage of LongTermDebtMaturityYearFiveAndThereafter100.0

ctl:NumberOfGlobalEnterpriseCustomers

ctl:NumberOfGlobalEnterpriseCustomers


Number
Period End2020-09-30
Value200.0
Percentage of NumberOfGlobalEnterpriseCustomers100.0

ctl:NumberofGlobalEnterpriseCustomers

ctl:NumberofGlobalEnterpriseCustomers


Numberof
Period End2020-12-31
Value200.0
Percentage of NumberofGlobalEnterpriseCustomers100.0

ctl:OperatingLossCarryforwardGross us-gaap:IncomeTaxAuthority

ctl:OperatingLossCarryforwardGross

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-31
Value99321137812813
Percentage of OperatingLossCarryforwardGross100.0100.0100.0

ctl:OperatingLossCarryforwardGross us-gaap:IncomeTaxAuthority, us-gaap:TaxPeriod

us-gaap:DomesticCountry, ctl:TaxYear2024


Operating
Period End2020-12-312019-12-312018-12-31
Value74514031402
Percentage of OperatingLossCarryforwardGross7.512.310.9

us-gaap:DomesticCountry, ctl:TaxYear2030


Operating
Period End2020-12-312019-12-312018-12-31
Value668668671
Percentage of OperatingLossCarryforwardGross6.75.95.2

us-gaap:DomesticCountry, ctl:TaxYear2031


Operating
Period End2020-12-312019-12-312018-12-31
Value733733732
Percentage of OperatingLossCarryforwardGross7.46.45.7

us-gaap:DomesticCountry, ctl:TaxYear2037


Operating
Period End2020-12-312019-12-312018-12-31
Value297629732715
Percentage of OperatingLossCarryforwardGross30.026.121.2

ctl:SharesofEntityCommonStockAssetsofEntitysDefinedContributionPlan

ctl:SharesofEntityCommonStockAssetsofEntitysDefinedContributionPlan


Sharesof
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1111127.07.0
Percentage of SharesofEntityCommonStockAssetsofEntitysDefinedContributionPlan100.0100.0100.0100.0100.0

ctl:WeightedAverageCostOfCapitalPercentage

ctl:WeightedAverageCostOfCapitalPercentage


Weighted
Period End2020-10-312019-10-31
Value7.66.3
Percentage of WeightedAverageCostOfCapitalPercentage100.0100.0

ctl:WeightedAverageCostOfCapitalPercentage us-gaap:ReportingUnit

srt:AsiaPacific


Weighted
Period End2020-10-312019-10-31
Value10.19.0
Percentage of WeightedAverageCostOfCapitalPercentage132.9142.9

srt:LatinAmerica


Weighted
Period End2020-10-312019-10-31
Value14.310.0
Percentage of WeightedAverageCostOfCapitalPercentage188.2158.7

us-gaap:EMEA


Weighted
Period End2020-10-312019-10-31
Value8.06.8
Percentage of WeightedAverageCostOfCapitalPercentage105.3107.9

lumn:FinanceLeaseAndOtherObligations

lumn:FinanceLeaseAndOtherObligations


Finance
Period End2021-06-302021-03-312020-12-31
Value321327295
Percentage of FinanceLeaseAndOtherObligations100.0100.0100.0

lumn:IntangibleAssetsGrossIncludingGoodwill

lumn:IntangibleAssetsGrossIncludingGoodwill


Intangible
Period End2021-06-302021-03-31
Value4170041600
Percentage of IntangibleAssetsGrossIncludingGoodwill100.0100.0

lumn:IntangibleAssetsNetIncludingGoodwillAndOtherAssetsNoncurrent

lumn:IntangibleAssetsNetIncludingGoodwillAndOtherAssetsNoncurrent


Intangible
Period End2021-06-302021-03-312020-12-31
Value292082944429880
Percentage of IntangibleAssetsNetIncludingGoodwillAndOtherAssetsNoncurrent100.0100.0100.0

lumn:LongTermDebtMaturityYearFiveAndThereafter

lumn:LongTermDebtMaturityYearFiveAndThereafter


Long
Period End2021-06-302021-03-31
Value2381422802
Percentage of LongTermDebtMaturityYearFiveAndThereafter100.0100.0

us-gaap:AccountsReceivableGross

us-gaap:AccountsReceivableGross


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-01
Value20002000210022002200220023002400250024002500260026002.5372.659
Percentage of AccountsReceivableGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableGrossCurrent

us-gaap:AccountsReceivableGrossCurrent


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2153236525402721219520952150213220752097773
Percentage of AccountsReceivableGrossCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableGrossCurrent us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:TradeAccountsReceivable


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1717197120942245188217891821
Percentage of AccountsReceivableGrossCurrent79.783.382.482.585.785.484.7

us-gaap:AccountsReceivableGrossCurrent us-gaap:AccountsNotesLoansAndFinancingReceivablesByBillingStatusType

us-gaap:UnbilledRevenues


Accounts
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value345374425436299288307
Percentage of AccountsReceivableGrossCurrent16.015.816.716.013.613.714.3

us-gaap:AccountsReceivableNet

us-gaap:AccountsReceivableNet


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-01-01
Value183018051889207021122110219422242379228623462436241423782504
Percentage of AccountsReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2469241322311966-2057.0-1895.0-1992.0-791.01688-988.0-139.0
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value27218458235162180
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax11.07.62.612.0-7.9-9.5

us-gaap:PensionPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value219722292173173118951715
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax89.092.497.488.0-92.1-90.5

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value13714819114011085106133128145142153160159164178152162155158
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1521621911561249910614313915614215316016816416517418017817316014915216015516316215514514515515114714615815715715814511495706047
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligation

us-gaap:AssetRetirementObligation


Asset
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value19919719011595911071061061094139
Percentage of AssetRetirementObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostNet us-gaap:CapitalizedContractCost

us-gaap:CapitalizedContractCostNet

ctl:ContractAcquisitionCosts


Capitalized
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value289292300320326319321329322295286254254
Percentage of CapitalizedContractCostNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctl:ContractFulfillmentCosts


Capitalized
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2162172192202212162071981871731166973
Percentage of CapitalizedContractCostNet74.774.373.068.867.867.764.560.258.158.640.627.228.7

lumn:ContractAcquisitionCosts


Capitalized
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value271279289300320326
Percentage of CapitalizedContractCostNet0.00.0100.0100.0100.0100.0

lumn:ContractFulfillmentCosts


Capitalized
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value217216216219220221
Percentage of CapitalizedContractCostNet0.00.074.773.068.867.8

us-gaap:CapitalizedContractCostNetCurrent us-gaap:CapitalizedContractCost

us-gaap:CapitalizedContractCostNetCurrent

ctl:ContractAcquisitionCosts


Capitalized
Period End2020-12-