CBB


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesAuthorized

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasicAndDiluted

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

us-gaap:Revenues

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostsAndExpenses

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:InterestExpense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:ProfitLoss

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:Assets
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:AccountsPayableCurrent

us-gaap:TaxesPayableCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:ContractWithCustomerLiabilityCurrent
us-gaap:BalanceSheetLocation

us-gaap:LongTermDebt
us-gaap:FairValueByMeasurementBasis

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:DeferredFinanceCostsNoncurrentNet

us-gaap:LongTermDebtAndCapitalLeaseObligations
us-gaap:DebtInstrument

us-gaap:DeferredTaxLiabilitiesNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:NetCashProvidedByUsedInFinancingActivities
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:SubsequentEventType
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:BusinessAcquisition, us-gaap:DebtInstrument
cbb:AggregateCashPaymentOnProRataBasis
us-gaap:BusinessAcquisition, us-gaap:DebtInstrument, us-gaap:SubsequentEventType

cbb:CapitalizedContractCostAdditions
us-gaap:CapitalizedContractCost
us-gaap:CapitalizedContractCost, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:RetirementPlanType
cbb:DefinedBenefitPlanAmortizationOfPriorServiceCostCreditAndActuarialNetGainLoss

cbb:IncreaseDecreaseInInventoriesPrepaidExpensesAndOtherCurrentAssets

cbb:NetIncomeLossAvailableToCommonStockHoldersBasicAndDiluted

cbb:OtherComponentsOfPensionAndPostretirementBenefitPlansExpense

cbb:OtherComponentsOfPensionAndPostretirementBenefitPlansExpenses

cbb:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementChargesAfterTax

cbb:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementChargesTax

cbb:PaymentsForRestructuringAndSeverance
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:RestructuringCostAndReserve

cbb:PaymentsToAcquirePropertyPlantAndEquipmentIncludingCostOfAcquisitions
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

cbb:PercentageOfRevenueByForeignSubsidiaries

cbb:SalesTaxesReleasedAmount

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:BusinessCombinationAcquisitionRelatedCosts

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalizedContractCostAmortization
us-gaap:CapitalizedContractCost
us-gaap:CapitalizedContractCost, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:DeferredIncomeTaxesAndTaxCredits
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit
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:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanSettlementsPlanAssets

us-gaap:DepreciationAmortizationAndAccretionNet
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:EmployeeBenefitsAndShareBasedCompensation

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeasePrincipalPayments

us-gaap:GoodwillForeignCurrencyTranslationGainLoss
us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInOtherCurrentLiabilities

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities

us-gaap:IncreaseDecreaseInReceivables

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet
us-gaap:BusinessAcquisition
us-gaap:LossOnContractTermination

us-gaap:NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsOfDebtIssuanceCosts
us-gaap:SubsequentEventType
us-gaap:PaymentsToAcquireIntangibleAssets

us-gaap:PaymentsToAcquireProductiveAssets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementBenefitContributions

us-gaap:PreferredStockDividendRatePercentage

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementEquityComponents

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities

us-gaap:RestructuringCharges
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:RestructuringCostAndReserve

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:RestructuringCostAndReserve
us-gaap:SeveranceCosts1
us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardGross

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationForfeited
us-gaap:StatementEquityComponents

us-gaap:UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss
us-gaap:MajorCustomers
cbb:AccountsReceivableFromOneCustomerGreaterThanTenPercentage

cbb:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour

cbb:LongTermDebtAndCapitalLeaseObligationGross

cbb:LongTermDebtAndCapitalLeaseObligationsGross

cbb:NumberOfCustomersExceedsTenPercentageOfAccountsReceivable

cbb:OtherFinancingArrangementsCurrentPortion

cbb:OtherFinancingArrangementsNonCurrentPortion

cbb:OtherInstallmentFinancingArrangements
us-gaap:FairValueByMeasurementBasis

cbb:PoleLicenseAgreementObligation

cbb:ReceivablesFacilityAmountOutstanding

cbb:ReceivablesFacilityMaximumBorrowingAvailability

cbb:ReceivablesFacilityMaximumBorrowingCapacity

cbb:ReceivablesFacilityRemainingBorrowingCapacity

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionSharePrice

us-gaap:CapitalizedContractCostNet
us-gaap:CapitalizedContractCost
us-gaap:CapitalizedContractCost, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
us-gaap:BalanceSheetLocation
us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredTaxAssetsNetNoncurrent
us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
us-gaap:RetirementPlanType
us-gaap:BalanceSheetLocation
us-gaap:DepositsAssetsCurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:DerivativeLiabilitiesCurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:DerivativeLiabilitiesNoncurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:InterestPayableCurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis
us-gaap:InterestRateCashFlowHedgeDerivativeAtFairValueNet

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LineOfCredit

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
us-gaap:DebtInstrument

us-gaap:OperatingLeaseLiability

us-gaap:PrepaidExpenseCurrent

us-gaap:RestructuringReserve
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:RestructuringCostAndReserve

us-gaap:RestructuringReserveCurrent

us-gaap:RevenueRemainingPerformanceObligation
us-gaap:ProductOrService
us-gaap:RevenueRemainingPerformanceObligationPercentage

Tables

  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁███████████████████████0.50.50.50.50.50.50.50.50.50.40.40.40.40.40.40.40.42.12.12.12.12.12.12.12.12.12.12.12.12.12.12.02.02.02.02.02.02.02.02.0NANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock█████████▇▇▁50.750.750.650.450.450.450.450.250.242.442.4-42.2NANANA42.1NANANA210.0NANANA209.6NANANA208.7NANANA203.0NANANA196.3NANANA198.3NANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:PreferredStock███████████▁3.13.13.13.13.13.13.13.13.13.13.1-3.1NANANA3.1NANANA3.1NANANA3.1NANANA3.1NANANA3.1NANANA3.1NANANA3.1NANANA
us-gaap:CommonStockSharesIssued NA50.68060550.56426750.420750.42044950.42044950.36060250.18411450.16539442.44015742.39415142.19796542.18203142.17387242.13332642.05623742.055001209.27729210.170716210.017999210.004855210.003255209.840204209.571138209.556709209.556709209.181943208.656995208.559589208.4899208.450336202.96043199.922339197.86491197.667345196.322649196.290915199.418167NA198.354851NANANA
us-gaap:CommonStockSharesAuthorized NA96.096.096.096.096.096.096.096.096.096.096.096.096.096.096.096.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0NA480.0NANANA
us-gaap:CommonStockSharesOutstanding NA50.68060550.56426750.420750.42044950.42044950.36060250.18411450.16539442.44015742.39415142.19796542.18203142.17387242.13332642.05623742.026791209.13624210.029666209.876949209.863805209.862205209.296068209.296068209.237944209.101069208.756303208.165275208.037869207.96818207.928616202.46871199.43062197.373191197.175626195.721796195.77734198.904592NA197.841276NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▄▁50.750.650.5NA50.450.450.3NA50.142.442.3NA42.242.242.3NA42.1210.4210.4NA210.2214.6209.2NA208.7209.4209.0NA208.5206.9202.8NA205.6201.7201.6NA200.6201.0199.8NA204.2205.7NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▄▁50.750.650.5NA50.450.450.3NA50.142.442.3NA42.242.242.1NA42.0209.8210.0NA209.8209.7209.2NA208.7208.5208.0NA207.0206.9202.8NA196.4195.8195.3NA196.5198.0197.8NA201.2201.0NA
us-gaap:EarningsPerShareBasicAndDiluted ▇▇▁▄▆█▃▂▅▅▇-0.21-0.21-0.72-0.46-0.32-0.16-0.59-0.65-0.41-0.39-0.26NANANA1.37NANANA0.02NANANA0.22-0.09999999999999998-0.14NA0.02-0.150.03-0.01-0.19-0.060.010.010.05NANANANANANANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cbb:EntertainmentandCommunications▇▇▇▇█████▁241.0239.7243.8246.4248.5250.5250.3251.9253.4173.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cbb:ItServicesAndHardware█▆▅▇▄▄▃█▄▁155.2147.0142.3150.4140.5140.2136.3153.9141.1128.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 TTM Greenblatt ROC _ _▄▄▁▃▄▄▃▄▃▄▄▃▃▄▂▃▄▄▄▄▅▄▅▃▃▅▆▅▆▅▄▆▇▇█▃█▇█▇24.727.7-20.215.322.824.910.124.414.520.224.29.812.720.9-5.310.525.527.429.625.036.229.737.17.316.035.656.940.157.746.819.257.966.065.281.09.286.377.686.464.5NANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax █▇▇█▇▇▇█▇▃▃▃▁▁▁▃▄▃▃▃▃▃▃▄▅▄▄▄▄▄▅▇▇▇▆▆▇▇▆▆▆▅▄389.5380.0380.0390.4382.5384.2379.6399.0386.7296.8295.7301.2255.5259.4249.6285.3312.4299.2288.9289.3299.8285.8292.9308.3327.5319.9322.5308.4310.8312.0325.7374.7368.2368.2362.8365.3368.8367.5360.8362.8351.9338.6323.7
us-gaap:Revenues █▇▇█▇▇▇█▇▃▃▃▁▁▁▃▄▃▃▃▃▃▃▄▅▄▄▄▄▄▅▇▇▇▆▆▇▇▆▆▆▅▄389.5380.0380.0390.4382.5384.2379.6399.0386.7296.8295.7301.2255.5259.4249.6285.3312.4299.2288.9289.3299.8285.8292.9308.3327.5319.9322.5308.4310.8312.0325.7374.7368.2368.2362.8365.3368.8367.5360.8362.8351.9338.6323.7
us-gaap:CostOfGoodsAndServicesSold █▇▇▇▇▇▇█▇▃▃▃▁▁▁203.9193.4193.7196.7194.7195.5197.7199.3197.7152.3149.4151.0127.0128.9124.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses ▆▅▇▆▆▆▆▆▆▂▂█▂▂▃▂▃▂▂▂▂▂▂▃▄▃▂▂▁▂▄▄▃▃▃▆▃▃▂▃▂▂▁364.8352.3400.2375.1359.7359.3369.5374.6372.2276.6271.5417.3276.5273.1283.5274.8286.9271.8259.3264.3263.6256.1255.8301.0311.5284.3265.6268.3253.1265.2306.5316.8302.2303.0281.8356.1282.5289.9274.4298.3269.3268.8241.3
us-gaap:SellingGeneralAndAdministrativeExpense ▇▆▇█▇▇▇█▇▃▄▅▁▂▂▁▂▂▁▂▁▂▁▂▂▁▂▂▁▁▁▄▄▃▃▃▃▃▃▄▄▄▄86.081.388.093.188.087.286.193.285.766.168.474.354.555.456.753.855.556.253.257.452.557.052.255.757.554.555.459.453.654.753.169.972.263.464.065.466.566.664.668.268.367.267.2
us-gaap:OperatingIncomeLoss ▄▄▁▃▄▄▃▄▃▄▄▃▃▄▂▃▄▄▄▄▅▄▅▃▃▅▆▅▆▅▄▆▇▇█▃█▇█▇█▇█24.727.7-20.215.322.824.910.124.414.520.224.29.812.720.9-5.310.525.527.429.625.036.229.737.17.316.035.656.940.157.746.819.257.966.065.281.09.286.377.686.464.582.669.882.4
us-gaap:InterestExpense ▄▄▄▄▄▄▄▄▄▄▃▃▁▁▁▁▁▁▁▂▂▃▄▄▄▅▅▅▆▆▇█████████▇▆▅33.433.533.734.635.034.935.135.233.731.830.830.318.818.118.017.617.919.920.320.921.528.032.731.935.840.740.342.046.745.447.955.655.253.754.453.853.353.454.553.752.042.437.1
us-gaap:OtherNonoperatingIncomeExpense ▄▄▄▄▄▄▅▃▅▄▄▅▁▄▄█▄▅▄▆▄▄▄▄▄▄▄▄▅▄▄▄▄▄▃▃▄▄▄▄▄▄0.20.20.80.1-0.5-0.11.0-0.81.20.80.42.1-4.50.60.46.40.11.10.03.3-0.40.0-0.40.20.2-0.1-0.6-0.11.2-0.10.3-0.1-0.10.0-1.5-0.90.00.00.0-0.30.0-0.2NA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▂▂▁▂▂▂▂▂▂▂▂▂▂▂▄▂▃▅▂▃▅█▂▂▁▆▂▁▂▂▂▂▂▂▃-11.1-9.4-55.7-22.0-15.5-13.1-26.6-14.6-21.0-15.3-9.5-21.6-10.63.494.8-0.429.6122.011.744.2123.4282.10.9-29.7-39.0185.216.5-34.210.7-3.4-30.3-11.410.711.525.1NANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▂▂▁▂▂▂▂▃▂▂▂▂▂▂▄▂▃▅▃▃▅█▂▂▂▆▃▂▂▂▃▂▃▃▃▁▃▃▃▂▃▃▄-2.9-1.6-21.7-1.4-1.9-7.60.315.4-3.3-1.5-1.2-5.40.61.334.41.210.844.44.713.744.1101.40.6-11.4-11.771.09.5-6.11.4-4.26.4-1.66.87.012.5-15.115.410.714.0-7.016.17.222.6
us-gaap:ProfitLoss ▇▇▁▄▆█▃-8.2-7.8-34.0-20.6-13.6-5.5-26.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▂▂▁▁▂▂▁▁▂▂▂▂▂▂▄▂▃▅▂▃▅█▄▂▁▆▂▁▂▂▁▂▂▂▃▁▃▃▃▂▃▂▃-8.2-7.8-34.0-20.6-13.6-5.5-26.9-30.0-17.7-13.8-8.3-16.2-11.22.160.4-1.318.877.67.032.680.3191.649.2-18.3-27.3114.27.0-28.19.30.8-36.7-9.83.94.512.6-30.417.613.517.9-18.614.59.622.8
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▇▇▁▄▆█▃▂▅▆▇-8.2-7.8-34.0-20.6-13.6-5.5-26.9-30.0-17.7-13.8-8.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▃▃▂▃▃▃▃▂▃▃▃▃▃▃▃▅▄▅▃▄▅█▄▂▃▆▃▃▄▃▂▃▃▃▃▁▄▄▄▂▄▃1.5-14.6-46.7-11.8-14.7-9.0-25.7-39.8-10.9-14.3-6.6-7.9-8.35.0-4.975.020.279.18.526.781.7197.650.6-62.5-26.1114.88.811.934.19.8-34.1-17.06.27.214.0-87.218.918.919.1-43.414.89.9NA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▂▂▁▁▂▂▁▁▂▂▂▂▂▂▄▂▃▅▂▃▅█▄▂▁▆▂▁▂▂▁▂▂▂▃▁▃▃▃▂▃▂▃-10.8-10.4-36.6-23.2-16.2-8.1-29.5-32.6-20.3-16.4-10.9-18.8-13.8-0.557.8-3.916.275.04.430.077.7189.046.6-20.9-29.9111.64.4-30.76.7-1.8-39.3-12.41.31.910.0-33.015.010.915.3-21.211.97.020.2
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ▇▇▇▇▇▇▇▇▇▅▅▅▁▁▁▂▂▁▁▁▁▁▂▃▄▅▄▄▆▄▅█▇▇▇▇▇▇▇▇2563.82594.22599.62653.82619.02655.72649.32730.22659.52166.12186.02162.41457.31481.71474.01541.01529.91423.21444.61454.41460.21509.61733.01819.71952.62176.92101.52107.32551.72145.42151.52872.42752.32702.72657.92714.72683.82658.52636.22653.6NANANA
us-gaap:Liabilities ▅▅▅▅▅▅▅▅▅▄▄▄▁▁▁▁▁▁▂▂▂▂▄▄▄▅▅▅▇▆▆██▇▇█▇▇▇▇2768.32798.82788.32793.82746.62768.02751.62805.22693.42309.52313.92305.51590.81605.71601.41662.71724.71640.21736.21752.61783.51913.12332.62468.22537.02732.92772.22784.03238.92865.12879.33570.63436.93398.93359.23429.93309.93292.13286.63321.4NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▇▇▇▇▇▇▇▇▇▅▅▅▁▁▁▂▂▁▁▁▁▁▂▃▄▅▄▄▆▄▅█▇▇▇▇▇▇▇▇2563.82594.22599.62653.82619.02655.72649.32730.22659.52166.12186.02162.41457.31481.71474.01541.01529.91423.21444.61454.41460.21509.61733.01819.71952.62176.92101.52107.32551.72145.42151.52872.42752.32702.72657.92714.72683.82658.52636.22653.6NANANA
us-gaap:StockholdersEquity ▆▆▆▇▇▇▇██▇▇▇▇▇▇▇▆▆▅▅▅▄▂▂▂▃▂▂▁▁▁▁▁▁▁▁▂▂▂▂-204.5-204.6-188.7-140.0-127.6-112.3-102.3-75.0-33.9-143.4-127.9-143.1-133.5-124.0-127.4-121.7-194.8-217.0-291.6-298.2-323.3-403.5-599.6-648.5-584.4-556.0-670.7-676.7-687.2-719.7-727.8-698.2-684.6-696.2-701.3-715.2-626.1-633.6-650.4-667.8NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▄▁▃▇▄▄▅▅█▆▆▆-179.9-189.6-182.8-170.1-178.9-177.8-174.3-175.5-165.7-172.5-172.0-173.7NANANA-90.3NANANA-171.0NANANA-173.9NANANA-133.3NANANA-209.7NANANA-208.9NANANA-160.0NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▇████████▁▁▁2671.52672.92674.22676.22676.82677.42678.42680.02681.32561.02562.22565.6NANANA2570.9NANANA2576.0NANANA2582.9NANANA2590.6NANANA2590.9NANANA2584.6NANANA2601.5NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:CommonStock█████████▁▁▁0.50.50.50.50.50.50.50.50.50.40.40.4NANANA0.4NANANA2.1NANANA2.1NANANA2.1NANANA2.0NANANA2.0NANANA2.0NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁▁▂▃▄▄▅▆▇▇█▇-2826.0-2817.8-2810.0-2776.0-2755.4-2741.8-2736.3-2709.4-2679.4-2661.7-2647.9-2664.8NANANA-2732.1NANANA-2834.2NANANA-3187.9NANANA-3263.5NANANA-3208.8NANANA-3220.0NANANA-3238.6NANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AssetsCurrent ▃▃▃▄▃▃▃▄▄███▂▂▂▂▃▁▁▁▂▂▃▃▅▇▂▂▇▂▂▃▂▂▂▃▃▃▃▃361.6377.5364.4403.8349.6362.5344.4445.9379.2699.3722.7710.4257.8273.3266.5229.9313.6208.9188.3200.4251.3272.5325.7336.6474.2608.3273.4251.1650.3231.5229.5303.5285.4278.6257.4321.0346.7339.7318.7322.9NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▁▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▂▃▅▁▁▆▁▁▁▁▁▁▂▂▂▂▂▁▁█8.87.010.611.66.59.33.915.410.630.332.417.843.758.244.79.78.59.67.97.425.414.813.457.9181.5347.24.24.6413.75.55.123.67.74.16.973.790.790.184.077.334.217.1576.8
us-gaap:AccountsReceivableNetCurrent ▆▆▆▇▅▅▅█▆▅▄▄▂▂▂▂▂▂▁▂▂▁▂▂▂▂▂▁▂▁▁▃▃▃▂▂▂▂▂▃280.1291.4270.0307.7253.2268.6260.0342.8286.0241.3232.4239.8170.0166.5173.2178.6172.2157.5138.5154.9160.2150.0160.7159.8174.1162.0165.6145.6153.4148.3148.1199.0193.8194.8176.0179.4178.6180.0165.6184.2NANANA
us-gaap:InventoryNet ▄▅▇▇██▆▇▇▄▇▇▂▂▃▂▂▂▂▂▂▃▂▃▂▁▂▂▃▃▃▄▃▃▃▂▂▁▂▂28.737.143.344.649.647.538.946.544.731.945.044.319.823.424.122.723.023.121.720.622.324.119.725.022.116.823.123.826.426.023.930.726.024.425.423.823.818.621.420.9NANANA
us-gaap:OtherAssetsCurrent █▆▆▇▇▅▆▆▇▅▆▅▄▄▃▃▃▂▂▂▂▁▃▂▃▁▂▂▃▁▃▇▇▅▃▂▄▂▃▁13.29.29.011.611.08.49.910.510.77.39.47.66.65.33.93.94.23.03.32.23.31.33.52.04.80.72.61.63.61.43.611.611.98.04.82.76.53.24.20.9NANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AmortizationOfIntangibleAssets ▇▇▇███▇██▁▂3.63.63.63.73.73.73.63.73.82.32.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentNet ▇▇▇██████▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▆▆▅▅▅▄▄▄▄1732.51741.81761.11780.81796.11813.61832.81844.01831.01125.81118.81129.01112.81111.71107.71085.51052.61021.7995.0975.5930.4894.5845.7859.5875.2874.7892.2902.8892.5879.0873.11587.41510.41471.51426.31400.51338.51296.11274.31264.4NANANA
us-gaap:Goodwill ▄▄▄▄▄▄▄▄▄▄▄▄▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▇▇▇▇▇████159.3158.3156.8160.5159.6160.1158.6157.0158.0149.4150.7151.018.618.618.614.314.314.314.314.314.414.414.414.414.414.414.414.414.414.414.4290.6290.6290.6290.6290.6340.9341.7341.7341.7NANANA
us-gaap:FiniteLivedIntangibleAssetsNet ▁▂▂▄▄▅▆▇█143.4146.1148.4155.4158.2162.4165.2168.1173.9NANA132.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▇█▇████▁34.135.234.135.835.937.437.20.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▄▄▅▅▅▅▆▆▅▅▅▁▁▂▁▁▁▁▁▂▂▂▃▃▃▃▃▃▄▃▃█▇▅▅▆▆▆▆▆46.749.754.358.260.161.163.767.756.852.752.020.417.723.019.018.819.718.416.825.626.828.632.433.933.838.834.836.644.141.140.086.371.859.660.962.264.264.664.466.4NANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LiabilitiesCurrent ▄▄▄▅▄▄▄▅▄▃▃▃▁▁▁▁▃▁▁▁▂▁▂▃▃▁▁▁█▂▂▃▂▂▂▃▂▂▂▂450.1474.8489.3523.5464.3473.8460.8541.7474.9368.2373.0357.3252.7261.9257.2232.9354.3256.9252.5259.2289.9272.7279.4409.8424.1270.6265.7254.3797.5274.7322.9355.4353.6331.4300.0356.4324.0309.2312.3328.7NANANA
us-gaap:AccountsPayableCurrent ▅▆▆▇▆▆▆█▇▄▄▄▂▂▂▂▂▃▂▂▃▂▂▂▂▂▂▁▂▁▂▂▂▂▁▂▁▁▁▂223.6259.2274.5284.6248.7273.2259.3331.9281.7205.1195.7185.6109.0121.5120.3105.9134.3142.5118.4127.4144.6123.7111.8135.6132.7105.1111.389.4107.3103.1111.7135.6132.2119.788.9133.498.995.687.5110.2NANANA
us-gaap:TaxesPayableCurrent ▅▃▄█▆▄▄▆▆▄▄▅▄▂▂▂▃▂▂▃▂▂▁▁▄▃▁▂▅▂▂▅▅▃▃▃▄▃▂▂20.416.519.229.122.817.518.224.822.617.518.021.219.212.211.812.914.512.012.414.513.512.610.210.618.016.611.112.919.714.113.821.619.716.315.715.517.014.513.513.5NANANA
us-gaap:OperatingLeaseLiabilityCurrent ▁▂▃█9.29.49.710.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ▂▃▂▃▂▂▂▂▁▁▁▂▁▂▂▁▁▁▁▁▁▁▁▂█▂▁▂▂▂▂▂▂▂▂▂▂▂▂▂46.951.851.652.644.544.944.539.227.631.229.237.231.234.935.231.925.324.524.225.022.223.925.946.3160.236.231.836.832.233.733.040.234.137.535.848.138.338.543.944.8NANANA
us-gaap:ContractWithCustomerLiabilityCurrent ▇█▇█▇▇▁▁50.355.954.159.150.850.51.51.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LongTermDebt █▇▆▁▁▃1910.81906.41897.11867.51867.11878.2NA1880.0NANANANANANANANANANANANANANANANA1802.9NANA2162.7NANANA2689.42575.22552.22531.22533.62526.02524.4NA2523.6NANANA
us-gaap:DebtAndCapitalLeaseObligations ▅▅▅▅▅▅▅▅▅▄▄▄▁▁▁▁▁▁▂▂▂▂▄▄▄▆▆▆█▆▆█1958.01957.21949.01923.61927.41937.11932.31929.81927.71744.11745.11747.71132.81126.91121.91206.61224.31140.41240.81245.61248.71391.51761.41784.21898.92226.32256.22265.22617.12190.22134.02689.4NANANANANANANANANANANA
us-gaap:DeferredFinanceCostsNoncurrentNet ▆▇▇▇▇▇███▇▇▇▅▅▅▅▅▁▁▅20.021.021.822.924.025.026.127.228.220.821.922.310.611.011.411.912.1-6.6-7.411.2NANANA18.5NANANA26.1NANANA47.1NANANA35.7NANANA41.7NANANA
us-gaap:LongTermDebtAndCapitalLeaseObligations ▅▅▅▅▅▅▅▅▅▄▄▄▁▁▁▁▁▁▂▂▂▂▄▄▄▆▆▆▅▆▆█▇▇▇▇▇▇▇▇1936.41933.71927.21901.31904.01913.91909.91909.61909.41727.31726.91729.31120.81116.11113.71199.11125.51125.71226.01231.81236.31379.01748.81771.01887.02214.22244.12252.62108.22183.02127.42676.02561.92538.72518.32520.62508.82506.92507.02507.1NANANA
us-gaap:DeferredTaxLiabilitiesNoncurrent NANA10.711.712.212.512.411.411.411.412.211.2NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▁█10.810.9NA11.7NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent ▃▃▂▂▃▃▃▃▃▁▁▁▂▂▂▂▂▃▃▃▂▃▃▃▁▂▂▂▄▆▇▇▇▇██▅▅▆▆216.9227.0211.1215.5220.1223.6226.7230.6225.3168.6173.2177.5186.3190.2194.1197.7214.0217.5221.4225.0215.9220.2233.9240.1174.3185.4193.6202.7262.3333.6355.3362.7355.7368.4379.5389.9304.0310.5319.9333.1NANANA
us-gaap:OtherLiabilitiesNoncurrent ▄▄▃▃▃▃▃▃▃▁▁▁▁▁▁▁▁▂▁▁▂▁▂▂▂▃▃▃▃▃▃█▇▇▇▇█▇▇▇86.182.181.171.775.571.968.572.872.434.028.630.231.037.536.433.030.940.136.336.641.439.139.347.351.662.768.874.470.973.873.7176.5165.7160.4161.4163.0173.1165.5147.4152.5NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▇█▇████▁30.932.931.232.132.233.734.50.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ▆▆▆▇▇▇▇██▇▇▇▇▇▇▇▆▆▅▅▅▄▂▂▂▃▂▂▁▁▁▁▁▁▁▁▂▂▂▂-204.5-204.6-188.7-140.0-127.6-112.3-102.3-75.0-33.9-143.4-127.9-143.1-133.5-124.0-127.4-121.7-194.8-217.0-291.6-298.2-323.3-403.5-599.6-648.5-584.4-556.0-670.7-676.7-687.2-719.7-727.8-698.2-684.6-696.2-701.3-715.2-626.1-633.6-650.4-667.8NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▄▁▃▇▄▄▅▅█▆▆▆-179.9-189.6-182.8-170.1-178.9-177.8-174.3-175.5-165.7-172.5-172.0-173.7NANANA-90.3NANANA-171.0NANANA-173.9NANANA-133.3NANANA-209.7NANANA-208.9NANANA-160.0NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▇████████▁▁▁2671.52672.92674.22676.22676.82677.42678.42680.02681.32561.02562.22565.6NANANA2570.9NANANA2576.0NANANA2582.9NANANA2590.6NANANA2590.9NANANA2584.6NANANA2601.5NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:CommonStock█████████▁▁▁0.50.50.50.50.50.50.50.50.50.40.40.4NANANA0.4NANANA2.1NANANA2.1NANANA2.1NANANA2.0NANANA2.0NANANA2.0NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁▁▂▃▄▄▅▆▇▇█▇-2826.0-2817.8-2810.0-2776.0-2755.4-2741.8-2736.3-2709.4-2679.4-2661.7-2647.9-2664.8NANANA-2732.1NANANA-2834.2NANANA-3187.9NANANA-3263.5NANANA-3208.8NANANA-3220.0NANANA-3238.6NANANA
us-gaap:CommonStockValue ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁███████████████████████0.50.50.50.50.50.50.50.50.50.40.40.40.40.40.40.40.42.12.12.12.12.12.12.12.12.12.12.12.12.12.12.02.02.02.02.02.02.02.02.0NANANA
us-gaap:AdditionalPaidInCapital ▇████████▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▃▃▃2671.52672.92674.22676.22676.82677.42678.42680.02681.32561.02562.22565.62567.32568.52570.12570.92573.32569.62574.12576.02577.62579.12581.22582.92584.72587.52587.52590.6NANANA2590.9NANANANANANANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▆▆▆▇▇▇▇▇███████▇▇▇▆▆▆▅▂▂▂▂▁▁▁▁▁▂▂▂▂▁▂▂▁▁-2826.0-2817.8-2810.0-2776.0-2755.4-2741.8-2736.3-2709.4-2679.4-2661.7-2647.9-2664.8-2680.8-2669.6-2671.7-2732.1-2730.8-2749.6-2827.2-2834.2-2866.8-2947.1-3138.7-3187.9-3169.6-3142.3-3256.5-3263.5-3235.4-3244.7-3245.5-3208.8-3199.0-3202.9-3207.4-3220.0-3189.6-3207.2-3220.7-3238.6NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▃▂▃▃▃▃▃▃▄▃▃▃▅▄▄█▄▃▃▃▄▄▃▃▆▆▆▅▃▂▁▁▁▁▁▁▄▄▄▄-179.9-189.6-182.8-170.1-178.9-177.8-174.3-175.5-165.7-172.5-172.0-173.7-149.8-152.7-155.6-90.3-166.6-168.0-169.5-171.0-165.1-166.5-172.5-173.9-129.7-130.9-131.5-133.3-173.3-198.1-207.1-209.7-202.5-204.8-207.5-208.9-152.1-153.4-158.8-160.0NANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedDefinedBenefitPlansAdjustment▇▅█▇▆▅▄▃▄▃▂▁-153.0-159.4-148.8-152.0-156.9-159.4-162.0-164.5-162.6-166.1-169.6-173.1NANANA-157.6NANANA-170.3NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest▂▁▁▄▃▄▆▇████-21.4-22.7-23.7-14.7-17.0-14.4-6.8-3.90.1-1.50.00.0NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedTranslationAdjustment▄▃▁▆▅▆▄▃▆▅▇█-5.5-7.5-10.3-3.4-5.0-4.0-5.5-7.1-3.2-4.9-2.4-0.6NANANA-0.8NANANA-0.7NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▂▃▆██▅▆▁▇▃1.21.31.72.02.01.61.81.11.91.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▅▄▆▆▆▆█▄▄▆▅▄▆▅▄▅▄▆▃▆▄▂▅▄▅▄▃▄▁▅▆▆▆▃█▇▅▆█▇▅▆65.344.529.170.270.162.056.891.932.931.458.546.633.969.053.931.543.632.166.016.262.026.46.354.427.056.037.819.030.4-12.942.357.763.168.323.691.480.652.965.095.479.254.670.8
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅▅▅▅▅▅▅▅▃▅▅▄▅▅▆▅▄▆▅▅▆█▅▅▆█▅▅▅▅▅▄▅▅▅▅▅▅▅▅▅▁▅-59.7-50.2-50.9-56.3-56.4-54.0-56.6-79.8-283.8-38.2-35.6-220.0-43.1-50.676.9-2.6-118.085.5-60.4-27.3102.1360.4-52.0-55.3154.8318.4-25.3-47.6-38.7-37.2-61.9-119.1-85.3-82.8-84.6-87.2-64.8-40.4-52.3-48.1-44.6-555.2-27.6
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▄▄▄▄▄▄▄▃▄▄█▄▄▃▄▅▃▄▄▃▁▄▃▁▄▄▁▇▄▄▅▄▄▄▄▄▄▄▄▄▄█-3.92.021.2-8.7-16.5-2.6-11.8-7.1-135.4-7.6-8.0526.2-5.3-4.9-95.8-27.773.3-115.9-5.1-6.9-153.5-385.41.2-122.7-347.5-31.4-12.9-380.5416.550.51.177.325.811.7-5.8-21.2-15.2-6.4-6.0-4.2-17.5-59.1510.6
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▅▅▅▅▅▅▅▅▁▅▅█▅▅▅1.8-3.6-1.05.1-2.85.4-11.54.8-386.2-15.415.7352.8-14.513.535.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▅▄▆▆▆▆█▄▄▆▅▄▆▅▄▅▄▆▃▆▄▂▅▄▅▄▃▄▁▅▆▆▆▃█▇▅▆█▇▅▆65.344.529.170.270.162.056.891.932.931.458.546.633.969.053.931.543.632.166.016.262.026.46.354.427.056.037.819.030.4-12.942.357.763.168.323.691.480.652.965.095.479.254.670.8
us-gaap:NetIncomeLoss ▂▂▁▁▂▂▁▁▂▂▂▂▂▂▄▂▃▅▂▃▅█▄▂▁▆▂▁▂▂▁▂▂▂▃▁▃▃▃▂▃▂▃-8.2-7.8-34.0-20.6-13.6-5.5-26.9-30.0-17.7-13.8-8.3-16.2-11.22.160.4-1.318.877.67.032.680.3191.649.2-18.3-27.3114.27.0-28.19.30.8-36.7-9.83.94.512.6-30.417.613.517.9-18.614.59.622.8
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▇▇▁▄▆█▃▂▅▆▇-8.2-7.8-34.0-20.6-13.6-5.5-26.9-30.0-17.7-13.8-8.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▇▇▁▄▆█▃-8.2-7.8-34.0-20.6-13.6-5.5-26.9NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncreaseDecreaseInAccountsPayable ▃▄▄▆▄▅▁█▅▄▅▅▄▅▅▄▄▅▄▃▆▅▃▅▅▄▅▄▅▃▅▅▅▅▃▆▅▅▃▆▄▄▃-34.8-16.5-5.336.4-12.611.0-74.878.713.4-0.63.620.0-7.54.15.8-9.2-17.917.2-3.2-25.825.87.2-24.219.26.9-6.419.0-16.72.6-27.023.43.57.718.4-36.532.53.15.8-22.224.1-0.61.6-20.5
us-gaap:ShareBasedCompensation ▃▄▅▆▆▄▅▃▅▄▃▂▄▃█▁▄▆▃▃▃▂▄▂▂▃▂▃▂▃▆▄▃▃▄▃▃▃▃1.21.31.72.02.01.61.81.11.91.41.20.71.31.02.90.31.32.31.21.01.00.81.30.80.80.90.80.90.80.92.31.61.21.11.31.11.11.00.9NANANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅▅▅▅▅▅▅▅▃▅▅▄▅▅▆▅▄▆▅▅▆█▅▅▆█▅▅▅▅▅▄▅▅▅▅▅▅▅▅▅▁▅-59.7-50.2-50.9-56.3-56.4-54.0-56.6-79.8-283.8-38.2-35.6-220.0-43.1-50.676.9-2.6-118.085.5-60.4-27.3102.1360.4-52.0-55.3154.8318.4-25.3-47.6-38.7-37.2-61.9-119.1-85.3-82.8-84.6-87.2-64.8-40.4-52.3-48.1-44.6-555.2-27.6
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▃▃▃▃▃▃▃▅▄▂▁▄▂▃▃▆▄▃▄▅▄▄▃▃▂▂▂▃▂▂▃█▄▅▅▅▄▂▃▃▂▁▁59.848.550.956.556.754.156.579.969.738.332.762.343.050.155.197.667.259.262.477.973.274.657.961.245.641.234.354.946.145.050.9124.375.582.884.688.574.540.152.448.543.030.927.3
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▄▄▄▄▄▄▄▃▄▄█▄▄▃▄▅▃▄▄▃▁▄▃▁▄▄▁▇▄▄▅▄▄▄▄▄▄▄▄▄▄█-3.92.021.2-8.7-16.5-2.6-11.8-7.1-135.4-7.6-8.0526.2-5.3-4.9-95.8-27.773.3-115.9-5.1-6.9-153.5-385.41.2-122.7-347.5-31.4-12.9-380.5416.550.51.177.325.811.7-5.8-21.2-15.2-6.4-6.0-4.2-17.5-59.1510.6
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage dei:LegalEntity,us-gaap:DebtInstrument,us-gaap:SubsequentEventType cbb:CincinnatiBellIncorporation,cbb:SeniorNotesDue2023,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage dei:LegalEntity,us-gaap:DebtInstrument,us-gaap:SubsequentEventType cbb:CincinnatiBellTelephoneCompanyLLCCBT,cbb:SeniorNotesDue2028,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

None

us-gaap:CommonStockValue

us-gaap:CommonStockValue


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0400000.0400000.0400000.0400000.0400000.0400000.0400000.0400000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1

None

us-gaap:SharesIssued us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value5050505050505050504242-42.242210209208203196198201228256
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStock


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value3.13.13.13.13.13.13.13.13.13.13.1-3.13.13.13.13.13.13.13.13.13.13.1
Percentage of SharesIssued6.16.16.16.26.26.26.26.26.27.37.37.37.41.51.51.51.51.61.61.51.41.2

None

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-10-042016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value50505050505050504242424242424221042209210210210210209209209209209208208208208202199197197196196199198201
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CommonStockSharesAuthorized

us-gaap:CommonStockSharesAuthorized


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value96969696969696969696969696969696480480480480480480480480480480480480480480480480480480480480480480480
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value50505050505050504242424242424242209210209209209209209209209208208208207207202199197197195195198197200
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value50505050505050424242424242210210210214209208209209208206202205201201200201199204205
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value50505050505050424242424242209210209209209208208208207206202196195195196198197201201
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-312016-03-312015-03-312014-12-312014-09-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-0.21-0.21-0.72-0.46-0.32-0.16-0.59-0.65-0.41-0.39-0.261.370.020.22-0.1-0.140.02-0.150.03-0.01-0.19-0.060.010.010.05
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value389380380390382384379399386296295301255259249285312299288289299285292308327319322308310312325374368368362365368367360362351338323
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value-6.7-6.7-6.1-6.4-6.5-6.5-7.0-6.8-7.8-5.4-6.1-6.1-6.5-6.4-3.3-15.9-3.5-3.1-3.9-3.0-2.6-2.9-2.8-6.4-6.6-7.6-7.7-7.2-7.2-7.3-7.4-9.1-8.6-8.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.7-1.8-1.6-1.6-1.7-1.7-1.8-1.7-2.0-1.8-2.1-2.0-2.5-2.5-1.3-5.6-1.1-1.0-1.3-1.0-0.9-1.0-1.0-2.1-2.0-2.4-2.4-2.3-2.3-2.3-2.3-2.4-2.3-2.3
Percentage of Revenues-1.7-1.8-1.6-1.6-1.7-1.7-1.8-1.7-2.0-1.8-2.1-2.0-2.5-2.5-1.3-5.6-1.1-1.0-1.3-1.0-0.9-1.0-1.0-2.1-2.0-2.4-2.4-2.3-2.3-2.3-2.3-2.4-2.3-2.3
Percentage of Revenues us-gaap:IntersegmentElimination0.00.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:IncomeStatementLocation

us-gaap:IntersegmentElimination, us-gaap:Sales


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value6.76.76.16.46.56.57.06.87.85.46.16.16.56.43.3153.53.13.93.02.62.92.86.46.67.67.77.27.27.37.49.18.68.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.81.61.61.71.71.81.72.01.82.12.02.52.51.35.61.11.01.31.00.91.01.02.12.02.42.42.32.32.32.32.42.32.3
Percentage of Revenues1.71.81.61.61.71.71.81.72.01.82.12.02.52.51.35.61.11.01.31.00.91.01.02.12.02.42.42.32.32.32.32.42.32.3
Percentage of Revenues us-gaap:IntersegmentElimination us-gaap:Sales0.00.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0

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

us-gaap:OperatingSegments, cbb:Cloud, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value21202122222224262623
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.45.45.75.75.95.96.46.66.87.7
Percentage of Revenues5.45.45.75.75.95.96.46.66.87.7
Percentage of Revenues us-gaap:OperatingSegments cbb:Cloud cbb:ItServicesAndHardware0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cbb:Communications, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value53555151514847494741
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.814.513.513.213.412.612.512.412.214.0
Percentage of Revenues13.814.513.513.213.412.612.512.412.214.0
Percentage of Revenues us-gaap:OperatingSegments cbb:Communications cbb:ItServicesAndHardware0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cbb:Consulting, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value49474138373838383533
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.712.411.09.79.89.910.29.59.311.3
Percentage of Revenues12.712.411.09.79.89.910.29.59.311.3
Percentage of Revenues us-gaap:OperatingSegments cbb:Consulting cbb:ItServicesAndHardware0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cbb:Data, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value11911911911811911911711711684
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax30.831.531.430.431.231.131.029.430.028.4
Percentage of Revenues30.831.531.430.431.231.131.029.430.028.4
Percentage of Revenues us-gaap:OperatingSegments cbb:Data cbb:EntertainmentandCommunications0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cbb:InfrastructureSolutions, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value30242738293125403230
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.96.47.39.87.68.16.710.18.310.2
Percentage of Revenues7.96.47.39.87.68.16.710.18.310.2
Percentage of Revenues us-gaap:OperatingSegments cbb:InfrastructureSolutions cbb:ItServicesAndHardware0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cbb:Other, cbb:EntertainmentandCommunications


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7.67.88.98.18.17.77.58.23.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.02.12.32.12.12.01.92.11.3
Percentage of Revenues2.02.12.32.12.12.01.92.11.3
Percentage of Revenues us-gaap:OperatingSegments cbb:Other cbb:EntertainmentandCommunications0.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cbb:OtherSegment, cbb:EntertainmentandCommunications


None
Period End2020-09-302019-09-30
Value7.68.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.02.1
Percentage of Revenues2.02.1
Percentage of Revenues us-gaap:OperatingSegments cbb:OtherSegment cbb:EntertainmentandCommunications0.00.0

us-gaap:OperatingSegments, cbb:Video, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value48484849505151525239
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.312.712.812.713.113.413.613.013.613.4
Percentage of Revenues12.312.712.812.713.113.413.613.013.613.4
Percentage of Revenues us-gaap:OperatingSegments cbb:Video cbb:EntertainmentandCommunications0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cbb:Voice, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value65646869707173757646
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.816.917.917.818.518.619.318.819.915.5
Percentage of Revenues16.816.917.917.818.518.619.318.819.915.5
Percentage of Revenues us-gaap:OperatingSegments cbb:Voice cbb:EntertainmentandCommunications0.00.00.00.00.00.00.00.00.00.0

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

us-gaap:IntersegmentElimination, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value4.95.04.95.15.35.26.05.96.54.75.25.15.45.30.4200.40.20.40.40.20.40.30.40.30.30.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.31.31.31.31.41.41.61.51.71.61.81.72.12.00.27.00.10.10.10.10.10.10.10.10.10.10.1
Percentage of Revenues1.31.31.31.31.41.41.61.51.71.61.81.72.12.00.27.00.10.10.10.10.10.10.10.10.10.10.1
Percentage of Revenues us-gaap:IntersegmentElimination cbb:EntertainmentandCommunications0.00.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:IntersegmentElimination, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value1.81.71.21.31.21.31.00.91.30.70.91.01.11.12.9-4.13.12.93.52.62.42.52.52.62.33.03.12.62.52.52.02.21.81.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.40.30.30.30.30.30.20.30.20.30.30.40.41.2-1.41.01.01.20.90.80.90.90.80.70.91.00.80.80.80.60.60.50.5
Percentage of Revenues0.50.40.30.30.30.30.30.20.30.20.30.30.40.41.2-1.41.01.01.20.90.80.90.90.80.70.91.00.80.80.80.60.60.50.5
Percentage of Revenues us-gaap:IntersegmentElimination cbb:ItServicesAndHardware0.00.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0

us-gaap:OperatingSegments, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value241239243246248250250251253173
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.963.164.263.165.065.265.963.165.558.6
Percentage of Revenues61.963.164.263.165.065.265.963.165.558.6
Percentage of Revenues us-gaap:OperatingSegments cbb:EntertainmentandCommunications0.00.00.00.0100.0100.00.00.0100.0100.0

us-gaap:OperatingSegments, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value155147142150140140136153141128
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.838.737.438.536.736.535.938.636.543.2
Percentage of Revenues39.838.737.438.536.736.535.938.636.543.2
Percentage of Revenues us-gaap:OperatingSegments cbb:ItServicesAndHardware0.00.00.00.0100.0100.00.00.0100.0100.0

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

us-gaap:OperatingSegments, cbb:EntertainmentandCommunications, us-gaap:TransferredAtPointInTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6.65.07.58.17.77.88.17.07.95.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.32.02.12.02.02.11.82.01.9
Percentage of Revenues1.71.32.02.12.02.02.11.82.01.9
Percentage of Revenues us-gaap:OperatingSegments cbb:EntertainmentandCommunications us-gaap:TransferredAtPointInTime0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cbb:EntertainmentandCommunications, us-gaap:TransferredOverTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value229229231233235237236239239163
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax58.960.460.959.761.661.862.259.961.855.1
Percentage of Revenues58.960.460.959.761.661.862.259.961.855.1
Percentage of Revenues us-gaap:OperatingSegments cbb:EntertainmentandCommunications us-gaap:TransferredOverTime0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cbb:ItServicesAndHardware, us-gaap:TransferredAtPointInTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value34283043333427423332
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.87.68.011.18.88.97.210.78.510.8
Percentage of Revenues8.87.68.011.18.88.97.210.78.510.8
Percentage of Revenues us-gaap:OperatingSegments cbb:ItServicesAndHardware us-gaap:TransferredAtPointInTime0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cbb:ItServicesAndHardware, us-gaap:TransferredOverTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value11911611010510510410711010695
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax30.630.729.127.027.727.328.427.727.632.2
Percentage of Revenues30.630.729.127.027.727.328.427.727.632.2
Percentage of Revenues us-gaap:OperatingSegments cbb:ItServicesAndHardware us-gaap:TransferredOverTime0.00.00.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimingOfTransferOfGoodOrService

us-gaap:TransferredAtPointInTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value403337514142354940374042241815
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.48.910.013.210.810.99.412.410.612.713.614.29.47.26.3
Percentage of Revenues10.48.910.013.210.810.99.412.410.612.713.614.29.47.26.3
Percentage of Revenues us-gaap:TransferredAtPointInTime0.00.00.00.00.00.0100.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:TransferredOverTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value348346342338341342344349345259255258231240233
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax89.691.190.086.889.289.190.687.689.487.386.485.890.692.893.7
Percentage of Revenues89.691.190.086.889.289.190.687.689.487.386.485.890.692.893.7
Percentage of Revenues us-gaap:TransferredOverTime0.00.00.00.00.00.0100.00.0100.0100.0100.00.0100.0100.0100.0

None

us-gaap:Revenues

us-gaap:Revenues


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value389380380390382384379399386296295301255259249285312299288289299285292308327319322308310312325374368368362365368367360362351338323
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value203193193196194195197199197152149151127128124
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues52.350.951.050.450.950.952.149.951.151.350.550.149.749.749.7

None

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value364352400375359359369374372276271417276273283274286271259264263256255301311284265268253265306316302303281356282289274298269268241
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues93.792.7105.396.194.093.597.393.996.393.291.8138.5108.2105.3113.696.391.890.889.891.487.989.687.397.695.188.982.487.081.485.094.184.582.182.377.797.576.678.976.182.276.579.474.5

None

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value86818893888786938566687454555653555653575257525557545559535453697263646566666468686767
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues22.121.423.223.823.022.722.723.422.222.323.124.721.321.422.718.917.818.818.419.817.519.917.818.117.617.017.219.317.217.516.318.719.617.217.617.918.018.117.918.819.419.820.8

None

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2427-20.215222410241420249.81220-5.310252729253629377.316355640574619576665819.286778664826982
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues6.37.3-5.33.96.06.52.76.13.76.88.23.35.08.1-2.13.78.29.210.28.612.110.412.72.44.911.117.613.018.615.05.915.517.917.722.32.523.421.123.917.823.520.625.5

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-7.1-8.0-34.0-16.7-5.5-5.2-7.6-8.5-17.8-5.1
Percentage of OperatingIncomeLoss-28.7-28.9168.3-109.2-24.1-20.9-75.2-34.8-122.8-25.2
Percentage of Revenues-1.8-2.1-8.9-4.3-1.4-1.4-2.0-2.1-4.6-1.7
Percentage of Revenues us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value27301224272924242525
Percentage of OperatingIncomeLoss110.1110.1-59.9158.8121.5116.5242.699.2172.4126.2
Percentage of Revenues7.08.03.26.27.27.56.56.16.58.6
Percentage of Revenues us-gaap:OperatingSegments cbb:EntertainmentandCommunications0.00.00.00.011.111.60.00.09.914.7

us-gaap:OperatingSegments, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4.65.21.77.70.61.1-6.88.77.3-0.2
Percentage of OperatingIncomeLoss18.618.8-8.450.32.64.4-67.335.750.3-1.0
Percentage of Revenues1.21.40.42.00.20.3-1.82.21.9-0.1
Percentage of Revenues us-gaap:OperatingSegments cbb:ItServicesAndHardware0.00.00.00.00.40.80.00.05.2-0.2

None

us-gaap:InterestExpense

us-gaap:InterestExpense


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value33333334353435353331303018181817171920202128323135404042464547555553545353535453524237
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues8.68.88.98.99.29.19.28.88.710.710.410.17.47.07.26.25.76.77.07.27.29.811.210.310.912.712.513.615.014.614.714.815.014.615.014.714.514.515.114.814.812.511.5

None

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.20.20.80.1-0.5-0.11.0-0.81.20.80.42.1-4.50.60.46.40.11.10.03.3-0.40.0-0.40.20.2-0.1-0.6-0.11.2-0.10.3-0.1-0.10.0-1.5-0.90.00.00.0-0.30.0-0.2
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.00.0100.00.0100.0
Percentage of Revenues0.10.10.20.0-0.1-0.00.3-0.20.30.30.10.7-1.80.20.22.20.00.40.01.1-0.10.0-0.10.10.1-0.0-0.2-0.00.4-0.00.1-0.0-0.00.0-0.4-0.20.00.00.0-0.10.0-0.1

None

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-11.1-9.4-55.7-22.0-15.5-13.1-26.6-14.6-21.0-15.3-9.5-21.6-10.63.494-0.42912211441232820.9-29.7-39.018516-34.210-3.4-30.3-11.4101125
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.8-2.5-14.7-5.6-4.1-3.4-7.0-3.7-5.4-5.2-3.2-7.2-4.11.338.0-0.19.540.84.015.341.298.70.3-9.6-11.957.95.1-11.13.4-1.1-9.3-3.02.93.16.9

None

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-2.9-1.6-21.7-1.4-1.9-7.60.315-3.3-1.5-1.2-5.40.61.3341.210444.713441010.6-11.4-11.7719.5-6.11.4-4.26.4-1.66.87.012-15.1151014-7.0167.222
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.7-0.4-5.7-0.4-0.5-2.00.13.9-0.9-0.5-0.4-1.80.20.513.80.43.514.81.64.714.735.50.2-3.7-3.622.22.9-2.00.5-1.32.0-0.41.81.93.4-4.14.22.93.9-1.94.62.17.0

None

us-gaap:ProfitLoss

us-gaap:ProfitLoss


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-8.2-7.8-34.0-20.6-13.6-5.5-26.9
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.1-2.1-8.9-5.3-3.6-1.4-7.1

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-8.2-7.8-34.0-20.6-13.6-5.5-26.9-30.0-17.7-13.8-8.3-16.2-11.22.160-1.318777.0328019149-18.3-27.31147.0-28.19.30.8-36.7-9.83.94.512-30.4171317-18.6149.622
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.1-2.1-8.9-5.3-3.6-1.4-7.1-7.5-4.6-4.6-2.8-5.4-4.40.824.2-0.56.025.92.411.326.867.016.8-5.9-8.335.72.2-9.13.00.3-11.3-2.61.11.23.5-8.34.83.75.0-5.14.12.87.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-8.2-7.8-34.0-20.6-13.6-5.5-26.9-30.0-17.7-13.8-8.3
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.1-2.1-8.9-5.3-3.6-1.4-7.1-7.5-4.6-4.6-2.8
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.5-14.6-46.7-11.8-14.7-9.0-25.7-39.8-10.9-14.3-6.6-7.9-8.35.0-4.97520798.5268119750-62.5-26.11148.811349.8-34.1-17.06.27.214-87.2181819-43.4149.9
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.4-3.8-12.3-3.0-3.8-2.3-6.8-10.0-2.8-4.8-2.2-2.6-3.21.9-2.026.36.526.42.99.227.369.117.3-20.3-8.035.92.73.911.03.1-10.5-4.51.72.03.9-23.95.15.15.3-12.04.22.9

None

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-10.8-10.4-36.6-23.2-16.2-8.1-29.5-32.6-20.3-16.4-10.9-18.8-13.8-0.557-3.916754.4307718946-20.9-29.91114.4-30.76.7-1.8-39.3-12.41.31.910.0-33.0151015-21.2117.020
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.8-2.7-9.6-5.9-4.2-2.1-7.8-8.2-5.2-5.5-3.7-6.2-5.4-0.223.2-1.45.225.11.510.425.966.115.9-6.8-9.134.91.4-10.02.2-0.6-12.1-3.30.40.52.8-9.04.13.04.2-5.83.42.16.2

None

us-gaap:Assets

us-gaap:Assets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value25632594259926532619265526492730265921662186216214571481147415411529142314441454146015091733181919522176210121072551214521512872275227022657271426832658263626532064
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

cbb:CorporateAndEliminations


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value328340312313274289363
Percentage of Assets12.813.112.011.810.510.913.3
Percentage of Assets12.813.112.011.810.510.913.3
Percentage of Assets cbb:CorporateAndEliminations100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1788180118221840185918861898
Percentage of Assets69.769.470.169.371.071.069.5
Percentage of Assets69.769.470.169.371.071.069.5
Percentage of Assets us-gaap:OperatingSegments cbb:EntertainmentandCommunications100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value447452464500485480468
Percentage of Assets17.517.417.918.918.518.117.1
Percentage of Assets17.517.417.918.918.518.117.1
Percentage of Assets us-gaap:OperatingSegments cbb:ItServicesAndHardware100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:Liabilities

us-gaap:Liabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value27682798278827932746276827512805269323092313230515901605160116621724164017361752178319132332246825372732277227843238286528793570343633983359342933093292328633212718
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets108.0107.9107.3105.3104.9104.2103.9102.7101.3106.6105.9106.6109.2108.4108.6107.9112.7115.2120.2120.5122.1126.7134.6135.6129.9125.5131.9132.1126.9133.5133.8124.3124.9125.8126.4126.3123.3123.8124.7125.2131.7

None

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value25632594259926532619265526492730265921662186216214571481147415411529142314441454146015091733181919522176210121072551214521512872275227022657271426832658263626532064
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-204.5-204.6-188.7-140.0-127.6-112.3-102.3-75.0-33.9-143.4-127.9-143.1-133.5-124.0-127.4-121.7-194.8-217.0-291.6-298.2-323.3-403.5-599.6-648.5-584.4-556.0-670.7-676.7-687.2-719.7-727.8-698.2-684.6-696.2-701.3-715.2-626.1-633.6-650.4-667.8-654.6-709.3-667.6
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-8.0-7.9-7.3-5.3-4.9-4.2-3.9-2.7-1.3-6.6-5.9-6.6-9.2-8.4-8.6-7.9-12.7-15.2-20.2-20.5-22.1-26.7-34.6-35.6-29.9-25.5-31.9-32.1-26.9-33.5-33.8-24.3-24.9-25.8-26.4-26.3-23.3-23.8-24.7-25.2-31.70.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-179.9-189.6-182.8-170.1-178.9-177.8-174.3-175.5-165.7-172.5-172.0-173.7-90.3-171.0-173.9-133.3-209.7-208.9-160.0-136.1-177.1-115.9
Percentage of StockholdersEquity88.092.796.9121.5140.2158.3170.4234.0488.8120.3134.5121.474.257.326.819.730.029.224.020.825.017.4
Percentage of Assets-7.0-7.3-7.0-6.4-6.8-6.7-6.6-6.4-6.2-8.0-7.9-8.0-5.9-11.8-9.6-6.3-7.3-7.7-6.0-6.60.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value2671267226742676267626772678268026812561256225652570257625822590259025842601261926952922
Percentage of StockholdersEquity-1306.4-1306.4-1417.2-1911.6-2097.8-2384.1-2618.2-3573.3-7909.4-1785.9-2003.3-1792.9-2112.5-863.8-398.3-382.8-371.1-361.4-389.6-400.2-380.0-437.8
Percentage of Assets104.2103.0102.9100.8102.2100.8101.198.2100.8118.2117.2118.6166.8177.1141.9122.990.295.298.0126.90.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value0.50.50.50.50.50.50.50.50.50.40.40.40.42.12.12.12.02.02.02.02.32.6
Percentage of StockholdersEquity-0.2-0.2-0.3-0.4-0.4-0.4-0.5-0.7-1.5-0.3-0.3-0.3-0.3-0.7-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.4
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-2826.0-2817.8-2810.0-2776.0-2755.4-2741.8-2736.3-2709.4-2679.4-2661.7-2647.9-2664.8-2732.1-2834.2-3187.9-3263.5-3208.8-3220.0-3238.6-3266.9-3356.5-3459.1
Percentage of StockholdersEquity1381.91377.21489.11982.92159.42441.52674.83612.57903.81856.12070.31862.22244.9950.4491.6482.3459.6450.2485.0499.1473.2518.1
Percentage of Assets-110.2-108.6-108.1-104.6-105.2-103.2-103.3-99.2-100.7-122.9-121.1-123.2-177.3-194.9-175.2-154.9-111.7-118.6-122.0-158.30.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value361377364403349362344445379699722710257273266229313208188200251272325336474608273251650231229303285278257321346339318322321
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.114.614.015.213.313.613.016.314.332.333.132.917.718.418.114.920.514.713.013.817.218.118.818.524.327.913.011.925.510.810.710.610.410.39.711.812.912.812.112.215.6

None

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value8.87.010116.59.33.915103032174358449.78.59.67.97.4251413571813474.24.64135.55.1237.74.16.973909084773417576236.726
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.40.40.20.40.10.60.41.41.50.83.03.93.00.60.60.70.50.51.71.00.83.29.315.90.20.216.20.30.20.80.30.20.32.73.43.43.22.90.00.00.01.10.00.0

None

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value280291270307253268260342286241232239170166173178172157138154160150160159174162165145153148148199193194176179178180165184159
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.911.210.411.69.710.19.812.610.811.110.611.111.711.211.811.611.311.19.610.711.09.99.38.88.97.47.96.96.06.96.96.97.07.26.66.66.76.86.36.97.7

None

us-gaap:InventoryNet

us-gaap:InventoryNet


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2837434449473846443145441923242223232120222419252216232326262330262425232318212023
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.41.71.71.91.81.51.71.71.52.12.01.41.61.61.51.51.61.51.41.51.61.11.41.10.81.11.11.01.21.11.10.90.91.00.90.90.70.80.81.1

None

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-10-022017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value139.29.011118.49.910107.39.47.6116.65.33.93.94.23.03.32.23.31.33.52.04.80.72.61.63.61.43.611118.04.82.76.53.24.20.91.5
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.40.30.40.40.30.40.40.40.30.40.40.00.50.40.30.30.30.20.20.20.20.10.20.10.20.00.10.10.10.10.20.40.40.30.20.10.20.10.20.00.1

None

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.63.63.63.73.73.73.63.73.82.32.6
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-10-022017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value173217411761178017961813183218441831112511181129111112111111071085105210219959759308948458598758748929028928798731587151014711426140013381296127412641123
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets67.667.167.767.168.668.369.267.568.852.051.252.20.076.475.075.170.468.871.868.967.163.759.348.847.244.840.242.542.835.041.040.655.354.954.453.751.649.948.848.347.654.4

None

us-gaap:Goodwill

us-gaap:Goodwill


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-10-022017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1591581561601591601581571581491501511331818181414141414141414141414141414141429029029029029034034134134171
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.26.16.06.06.16.06.05.85.96.96.97.00.01.31.31.30.90.91.01.01.01.01.00.80.80.70.70.70.70.60.70.710.110.610.810.910.712.712.913.012.93.5

us-gaap:Goodwill us-gaap:StatementBusinessSegments

cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value12121212121211119.82.22.21111111111
Percentage of Goodwill7.87.87.97.77.87.77.47.06.21.51.57.983.282.581.981.9
Percentage of Assets0.50.50.50.50.50.50.40.40.40.10.10.60.80.80.60.6
Percentage of Assets cbb:EntertainmentandCommunications0.00.00.00.00.00.00.60.60.50.20.21.11.11.21.40.0

cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1461451441481471471461461481471481392.42.52.62.62.52.52.52.3
Percentage of Goodwill92.292.292.192.392.292.392.693.093.898.598.592.116.817.518.118.10.90.90.73.2
Percentage of Assets5.75.65.65.65.65.65.55.35.66.86.86.40.20.20.10.10.10.10.10.1
Percentage of Assets cbb:ItServicesAndHardware0.00.00.00.00.00.031.931.232.937.230.031.34.04.34.25.35.86.87.29.9

None

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value143146148155158162165168173132
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.65.65.75.96.06.16.26.26.56.1

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value104106107112114117119121125107
Percentage of FiniteLivedIntangibleAssetsNet72.572.672.572.372.372.372.372.372.281.0
Percentage of Assets4.14.14.14.24.44.44.54.54.75.0
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.0

us-gaap:TechnologyBasedIntangibleAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value6.97.07.27.77.98.28.38.68.99.7
Percentage of FiniteLivedIntangibleAssetsNet4.84.84.95.05.05.05.05.15.17.3
Percentage of Assets0.30.30.30.30.30.30.30.30.30.4
Percentage of Assets us-gaap:TechnologyBasedIntangibleAssets0.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value32333335353637373915
Percentage of FiniteLivedIntangibleAssetsNet22.722.722.622.722.722.722.622.522.711.7
Percentage of Assets1.31.31.31.31.41.41.41.41.50.7
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.00.00.00.00.0

None

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value343534353537370.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.31.41.31.31.41.41.40.0

None

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-10-022017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4649545860616367565252203.21723191819181625262832333338343644414086715960626464646644
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.92.12.22.32.32.42.52.12.42.40.90.01.21.61.31.21.31.31.21.81.81.91.91.91.71.81.71.71.71.91.93.02.62.22.32.32.42.42.42.52.2

None

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value450474489523464473460541474368373357252261257232354256252259289272279409424270265254797274322355353331300356324309312328323
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.618.318.819.717.717.817.419.817.917.017.116.517.317.717.415.123.218.117.517.819.918.116.122.521.712.412.612.131.312.815.012.412.812.311.313.112.111.611.812.415.7

None

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2232592742842482732593312812051951851091211201051341421181271441231111351321051118910710311113513211988133989587110106
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.710.010.610.79.510.39.812.210.69.59.08.67.58.28.26.98.810.08.28.89.98.26.57.56.84.85.34.24.24.85.24.74.84.43.34.93.73.63.34.25.1

None

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2016192922171824221718211912111214121214131210101816111219141321191615151714131314
Percentage of TaxesPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.60.71.10.90.70.70.90.80.80.81.01.30.80.80.80.90.80.91.00.90.80.60.60.90.80.50.60.80.70.60.80.70.60.60.60.60.50.50.50.7

None

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value9.29.49.710
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0
Percentage of Assets0.40.40.40.4

None

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-10-022017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4651515244444439273129371831343531252424252223254616036313632333340343735483838434435
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.82.02.02.01.71.71.71.41.01.41.31.70.02.12.42.42.11.71.71.71.71.51.61.52.58.21.71.51.71.31.61.51.41.21.41.31.81.41.41.71.71.7

None

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value5055545950501.51.4
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.02.22.12.21.91.90.10.1

us-gaap:ContractWithCustomerLiabilityCurrent us-gaap:BalanceSheetLocation

us-gaap:OtherCurrentLiabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1.61.61.51.51.51.51.4
Percentage of ContractWithCustomerLiabilityCurrent3.22.92.82.53.03.0100.0
Percentage of Assets0.10.10.10.10.10.10.1
Percentage of Assets us-gaap:OtherCurrentLiabilities0.00.00.00.00.00.00.0

None

us-gaap:LongTermDebt

us-gaap:LongTermDebt


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312014-09-302013-12-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value19101906189718671867187818801802216226892575255225312533252625242523
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets74.573.573.070.471.370.768.992.3102.693.693.694.495.293.394.195.095.1

us-gaap:LongTermDebt us-gaap:FairValueByMeasurementBasis

us-gaap:EstimateOfFairValueFairValueDisclosure


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1945192218191921177917441673
Percentage of LongTermDebt101.8100.895.9102.995.392.989.0
Percentage of Assets75.974.170.072.468.065.761.3
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.00.00.0

None

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:DebtAndCapitalLeaseObligations


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value19581957194919231927193719321929192717441745174711321126112112061224114012401245124813911761178418982226225622652617219021342689
Percentage of DebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets76.475.475.072.573.672.972.970.772.580.579.880.877.776.176.178.380.080.185.985.685.592.2101.698.097.2102.3107.4107.5102.6102.199.293.6

None

us-gaap:DeferredFinanceCostsNoncurrentNet

us-gaap:DeferredFinanceCostsNoncurrentNet


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2021212224252627282021221011111112-6.6-7.4111826473541
Percentage of DeferredFinanceCostsNoncurrentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.80.90.90.91.01.01.11.01.01.00.70.70.80.80.8-0.5-0.50.81.01.21.61.31.6

None

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value19361933192719011904191319091909190917271726172911201116111311991125112512261231123613791748177118872214224422522108218321272676256125382518252025082506250725071963
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets75.574.574.171.672.772.172.169.971.879.779.080.076.975.375.677.873.679.184.984.784.791.3100.997.396.6101.7106.8106.982.6101.898.993.293.193.994.792.993.594.395.194.595.1

us-gaap:LongTermDebtAndCapitalLeaseObligations us-gaap:DebtInstrument

cbb:TrancheBTermLoandue2024


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value5825835855865885895915925945955945940.0
Percentage of LongTermDebtAndCapitalLeaseObligations30.130.230.430.830.930.830.931.031.134.534.434.30.0
Percentage of Assets22.722.522.522.122.522.222.321.722.327.527.227.50.0
Percentage of Assets cbb:TrancheBTermLoandue20240.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:DeferredTaxLiabilitiesNoncurrent

us-gaap:DeferredTaxLiabilitiesNoncurrent


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value101112121211111112110.0
Percentage of DeferredTaxLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.40.40.50.50.50.40.40.50.60.50.0

None

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


None
Period End2020-09-302020-06-302019-12-31
Value101011
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0
Percentage of Assets0.40.40.4

None

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent

us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value216227211215220223226230225168173177186190194197214217221225215220233240174185193202262333355362355368379389304310319333314
Percentage of PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.58.88.18.18.48.48.68.48.57.87.98.212.812.813.212.814.015.315.315.514.814.613.513.28.98.59.29.610.315.516.512.612.913.614.314.411.311.712.112.615.3

None

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value86828171757168727234283031373633304036364139394751626874707373176165160161163173165147152116
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.43.23.12.72.92.72.62.72.71.61.31.42.12.52.52.12.02.82.52.52.82.62.32.62.62.93.33.52.83.43.46.16.05.96.16.06.46.25.65.75.7

None

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value303231323233340.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.21.31.21.21.21.31.30.0

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-204.5-204.6-188.7-140.0-127.6-112.3-102.3-75.0-33.9-143.4-127.9-143.1-133.5-124.0-127.4-121.7-194.8-217.0-291.6-298.2-323.3-403.5-599.6-648.5-584.4-556.0-670.7-676.7-687.2-719.7-727.8-698.2-684.6-696.2-701.3-715.2-626.1-633.6-650.4-667.8-654.6-709.3-667.6
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-8.0-7.9-7.3-5.3-4.9-4.2-3.9-2.7-1.3-6.6-5.9-6.6-9.2-8.4-8.6-7.9-12.7-15.2-20.2-20.5-22.1-26.7-34.6-35.6-29.9-25.5-31.9-32.1-26.9-33.5-33.8-24.3-24.9-25.8-26.4-26.3-23.3-23.8-24.7-25.2-31.70.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-179.9-189.6-182.8-170.1-178.9-177.8-174.3-175.5-165.7-172.5-172.0-173.7-90.3-171.0-173.9-133.3-209.7-208.9-160.0-136.1-177.1-115.9
Percentage of StockholdersEquity88.092.796.9121.5140.2158.3170.4234.0488.8120.3134.5121.474.257.326.819.730.029.224.020.825.017.4
Percentage of Assets-7.0-7.3-7.0-6.4-6.8-6.7-6.6-6.4-6.2-8.0-7.9-8.0-5.9-11.8-9.6-6.3-7.3-7.7-6.0-6.60.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value2671267226742676267626772678268026812561256225652570257625822590259025842601261926952922
Percentage of StockholdersEquity-1306.4-1306.4-1417.2-1911.6-2097.8-2384.1-2618.2-3573.3-7909.4-1785.9-2003.3-1792.9-2112.5-863.8-398.3-382.8-371.1-361.4-389.6-400.2-380.0-437.8
Percentage of Assets104.2103.0102.9100.8102.2100.8101.198.2100.8118.2117.2118.6166.8177.1141.9122.990.295.298.0126.90.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value0.50.50.50.50.50.50.50.50.50.40.40.40.42.12.12.12.02.02.02.02.32.6
Percentage of StockholdersEquity-0.2-0.2-0.3-0.4-0.4-0.4-0.5-0.7-1.5-0.3-0.3-0.3-0.3-0.7-0.3-0.3-0.3-0.3-0.3-0.3-0.3-0.4
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-2826.0-2817.8-2810.0-2776.0-2755.4-2741.8-2736.3-2709.4-2679.4-2661.7-2647.9-2664.8-2732.1-2834.2-3187.9-3263.5-3208.8-3220.0-3238.6-3266.9-3356.5-3459.1
Percentage of StockholdersEquity1381.91377.21489.11982.92159.42441.52674.83612.57903.81856.12070.31862.22244.9950.4491.6482.3459.6450.2485.0499.1473.2518.1
Percentage of Assets-110.2-108.6-108.1-104.6-105.2-103.2-103.3-99.2-100.7-122.9-121.1-123.2-177.3-194.9-175.2-154.9-111.7-118.6-122.0-158.30.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:CommonStockValue

us-gaap:CommonStockValue


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0500000.0400000.0400000.0400000.0400000.0400000.0400000.0400000.0400000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02100000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.02000000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1

None

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value26712672267426762676267726782680268125612562256525672568257025702573256925742576257725792581258225842587258725902590
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets104.2103.0102.9100.8102.2100.8101.198.2100.8118.2117.2118.6176.2173.3174.4166.8168.2180.6178.2177.1176.5170.8148.9141.9132.4118.9123.1122.990.2

None

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-2826000000.0-2817800000.0-2810000000.0-2776000000.0-2755400000.0-2741800000.0-2736300000.0-2709400000.0-2679400000.0-2661700000.0-2647900000.0-2664800000.0-2680800000.0-2669600000.0-2671700000.0-2732100000.0-2730800000.0-2749600000.0-2827200000.0-2834200000.0-2866800000.0-2947100000.0-3138700000.0-3187900000.0-3169600000.0-3142300000.0-3256500000.0-3263500000.0-3235400000.0-3244700000.0-3245500000.0-3208800000.0-3199000000.0-3202900000.0-3207400000.0-3220000000.0-3189600000.0-3207200000.0-3220700000.0-3238600000.0-3266900000.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-110.2-108.6-108.1-104.6-105.2-103.2-103.3-99.2-100.7-122.9-121.1-123.2-184.0-180.2-181.3-177.3-178.5-193.2-195.7-194.9-196.3-195.2-181.1-175.2-162.3-144.3-155.0-154.9-126.8-151.2-150.8-111.7-116.2-118.5-120.7-118.6-118.8-120.6-122.2-122.0-158.3

None

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-179.9-189.6-182.8-170.1-178.9-177.8-174.3-175.5-165.7-172.5-172.0-173.7-149.8-152.7-155.6-90.3-166.6-168.0-169.5-171.0-165.1-166.5-172.5-173.9-129.7-130.9-131.5-133.3-173.3-198.1-207.1-209.7-202.5-204.8-207.5-208.9-152.1-153.4-158.8-160.0-136.1
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-7.0-7.3-7.0-6.4-6.8-6.7-6.6-6.4-6.2-8.0-7.9-8.0-10.3-10.3-10.6-5.9-10.9-11.8-11.7-11.8-11.3-11.0-10.0-9.6-6.6-6.0-6.3-6.3-6.8-9.2-9.6-7.3-7.4-7.6-7.8-7.7-5.7-5.8-6.0-6.0-6.6

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value-153.0-159.4-148.8-152.0-156.9-159.4-162.0-164.5-162.6-166.1-169.6-173.1-157.6-170.3
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax85.084.181.489.487.789.792.993.798.196.398.699.7174.599.6
Percentage of Assets-6.0-6.1-5.7-5.7-6.0-6.0-6.1-6.0-6.1-7.7-7.8-8.0-10.2-11.7
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-21.4-22.7-23.7-14.7-17.0-14.4-6.8-3.90.1-1.50.00.00.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax11.912.013.08.69.58.13.92.2-0.10.9-0.0-0.0-0.0
Percentage of Assets-0.8-0.9-0.9-0.6-0.6-0.5-0.3-0.10.0-0.10.00.00.0
Percentage of Assets us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value-5.5-7.5-10.3-3.4-5.0-4.0-5.5-7.1-3.2-4.9-2.4-0.6-0.8-0.7
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax3.14.05.62.02.82.23.24.01.92.81.40.30.90.4
Percentage of Assets-0.2-0.3-0.4-0.1-0.2-0.2-0.2-0.3-0.1-0.2-0.1-0.0-0.1-0.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1200000.01300000.01700000.02000000.02000000.01600000.01800000.01100000.01900000.01400000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1200000.01300000.01700000.02000000.02000000.01600000.01800000.01100000.01900000.01400000.01200000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value654429707062569132315846336953314332661662266.3542756371930-12.942576368239180526595795470
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues16.811.77.718.018.316.115.023.08.510.619.815.513.326.621.611.014.010.722.85.620.79.22.217.68.217.511.76.29.8-4.113.015.417.118.56.525.021.914.418.026.322.516.121.9

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-59.7-50.2-50.9-56.3-56.4-54.0-56.6-79.8-283.8-38.2-35.6-220.0-43.1-50.676-2.6-118.085-60.4-27.3102360-52.0-55.3154318-25.3-47.6-38.7-37.2-61.9-119.1-85.3-82.8-84.6-87.2-64.8-40.4-52.3-48.1-44.6-555.2-27.6
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-15.3-13.2-13.4-14.4-14.7-14.1-14.9-20.0-73.4-12.9-12.0-73.0-16.9-19.530.8-0.9-37.828.6-20.9-9.434.1126.1-17.8-17.947.399.5-7.8-15.4-12.5-11.9-19.0-31.8-23.2-22.5-23.3-23.9-17.6-11.0-14.5-13.3-12.7-164.0-8.5

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-3.92.021-8.7-16.5-2.6-11.8-7.1-135.4-7.6-8.0526-5.3-4.9-95.8-27.773-115.9-5.1-6.9-153.5-385.41.2-122.7-347.5-31.4-12.9-380.5416501.1772511-5.8-21.2-15.2-6.4-6.0-4.2-17.5-59.1510
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-1.00.55.6-2.2-4.3-0.7-3.1-1.8-35.0-2.6-2.7174.7-2.1-1.9-38.4-9.723.5-38.7-1.8-2.4-51.2-134.80.4-39.8-106.1-9.8-4.0-123.4134.016.20.320.67.03.2-1.6-5.8-4.1-1.7-1.7-1.2-5.0-17.5157.7

None

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.8-3.6-1.05.1-2.85.4-11.54.8-386.2-15.415352-14.51335
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.5-0.9-0.31.3-0.71.4-3.01.2-99.9-5.25.3117.1-5.75.214.0

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value654429707062569132315846336953314332661662266.3542756371930-12.942576368239180526595795470
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues16.811.77.718.018.316.115.023.08.510.619.815.513.326.621.611.014.010.722.85.620.79.22.217.68.217.511.76.29.8-4.113.015.417.118.56.525.021.914.418.026.322.516.121.9

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-8.2-7.8-34.0-20.6-13.6-5.5-26.9-30.0-17.7-13.8-8.3-16.2-11.22.160-1.318777.0328019149-18.3-27.31147.0-28.19.30.8-36.7-9.83.94.512-30.4171317-18.6149.622
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.1-2.1-8.9-5.3-3.6-1.4-7.1-7.5-4.6-4.6-2.8-5.4-4.40.824.2-0.56.025.92.411.326.867.016.8-5.9-8.335.72.2-9.13.00.3-11.3-2.61.11.23.5-8.34.83.75.0-5.14.12.87.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-8.2-7.8-34.0-20.6-13.6-5.5-26.9-30.0-17.7-13.8-8.3
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.1-2.1-8.9-5.3-3.6-1.4-7.1-7.5-4.6-4.6-2.8
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:ProfitLoss

us-gaap:ProfitLoss


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-8.2-7.8-34.0-20.6-13.6-5.5-26.9
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-2.1-2.1-8.9-5.3-3.6-1.4-7.1

None

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-34.8-16.5-5.336-12.611-74.87813-0.63.620-7.54.15.8-9.2-17.917-3.2-25.8257.2-24.2196.9-6.419-16.72.6-27.0233.57.718-36.5323.15.8-22.224-0.61.6-20.5
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1200000.01300000.01700000.02000000.02000000.01600000.01800000.01100000.01900000.01400000.01200000.0700000.01300000.01000000.02900000.0300000.01300000.02300000.01200000.01000000.01000000.0800000.01300000.0800000.0800000.0900000.0800000.0900000.0800000.0900000.02300000.01600000.01200000.01100000.01300000.01100000.01100000.01000000.0900000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-59.7-50.2-50.9-56.3-56.4-54.0-56.6-79.8-283.8-38.2-35.6-220.0-43.1-50.676-2.6-118.085-60.4-27.3102360-52.0-55.3154318-25.3-47.6-38.7-37.2-61.9-119.1-85.3-82.8-84.6-87.2-64.8-40.4-52.3-48.1-44.6-555.2-27.6
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-15.3-13.2-13.4-14.4-14.7-14.1-14.9-20.0-73.4-12.9-12.0-73.0-16.9-19.530.8-0.9-37.828.6-20.9-9.434.1126.1-17.8-17.947.399.5-7.8-15.4-12.5-11.9-19.0-31.8-23.2-22.5-23.3-23.9-17.6-11.0-14.5-13.3-12.7-164.0-8.5

None

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value594850565654567969383262435055976759627773745761454134544645501247582848874405248433027
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


None
Period End2020-06-302019-06-30
Value0.00.1
Percentage of PaymentsToAcquirePropertyPlantAndEquipment0.00.2

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cbb:EntertainmentandCommunications


None
Period End2020-06-302019-06-30
Value4247
Percentage of PaymentsToAcquirePropertyPlantAndEquipment87.088.5

us-gaap:OperatingSegments, cbb:ItServicesAndHardware


None
Period End2020-06-302019-06-30
Value6.36.1
Percentage of PaymentsToAcquirePropertyPlantAndEquipment13.011.3

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-3.92.021-8.7-16.5-2.6-11.8-7.1-135.4-7.6-8.0526-5.3-4.9-95.8-27.773-115.9-5.1-6.9-153.5-385.41.2-122.7-347.5-31.4-12.9-380.5416501.1772511-5.8-21.2-15.2-6.4-6.0-4.2-17.5-59.1510
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-1.00.55.6-2.2-4.3-0.7-3.1-1.8-35.0-2.6-2.7174.7-2.1-1.9-38.4-9.723.5-38.7-1.8-2.4-51.2-134.80.4-39.8-106.1-9.8-4.0-123.4134.016.20.320.67.03.2-1.6-5.8-4.1-1.7-1.7-1.2-5.0-17.5157.7

None

us-gaap:DebtInstrumentInterestRateStatedPercentage dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:DebtInstrumentInterestRateStatedPercentage

cbb:CincinnatiBellIncorporation, cbb:SeniorNotesDue2023, us-gaap:SubsequentEvent


None
Period End2020-07-02
Value0.0725
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations cbb:CincinnatiBellIncorporation cbb:SeniorNotesDue2023 us-gaap:SubsequentEvent0.0

cbb:CincinnatiBellTelephoneCompanyLLCCBT, cbb:SeniorNotesDue2028, us-gaap:SubsequentEvent


None
Period End2020-07-02
Value0.063
Percentage of DebtInstrumentInterestRateStatedPercentage86.9
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations cbb:CincinnatiBellTelephoneCompanyLLCCBT cbb:SeniorNotesDue2028 us-gaap:SubsequentEvent0.0

cbb:AggregateCashPaymentOnProRataBasis us-gaap:BusinessAcquisition, us-gaap:DebtInstrument

cbb:AggregateCashPaymentOnProRataBasis

cbb:MacquarieInfrastructurePartnersV, cbb:SeniorNotesDue2024


None
Period End2020-07-02
Value2812500.0
Percentage of AggregateCashPaymentOnProRataBasis100.0

cbb:MacquarieInfrastructurePartnersV, cbb:SeniorNotesDue2025


None
Period End2020-07-02
Value1050000.0
Percentage of AggregateCashPaymentOnProRataBasis37.3

cbb:AggregateCashPaymentOnProRataBasis us-gaap:BusinessAcquisition, us-gaap:DebtInstrument, us-gaap:SubsequentEventType

cbb:MacquarieInfrastructurePartnersV, cbb:SeniorNotesDue2024, us-gaap:SubsequentEvent


None
Period End2020-07-02
Value2812500.0
Percentage of AggregateCashPaymentOnProRataBasis100.0

cbb:MacquarieInfrastructurePartnersV, cbb:SeniorNotesDue2025, us-gaap:SubsequentEvent


None
Period End2020-07-02
Value1050000.0
Percentage of AggregateCashPaymentOnProRataBasis37.3

cbb:CapitalizedContractCostAdditions

cbb:CapitalizedContractCostAdditions


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value3.93.84.04.84.94.56.75.55.5
Percentage of CapitalizedContractCostAdditions100.0100.0100.0100.0100.0100.0100.0100.0100.0

cbb:CapitalizedContractCostAdditions us-gaap:CapitalizedContractCost

cbb:CostofAcquisition


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2.42.52.62.83.12.92.92.12.0
Percentage of CapitalizedContractCostAdditions61.565.865.058.363.364.443.338.236.4

cbb:FulfillmentCost


None
Period End2020-09-302020-06-302020-03-31
Value1.51.31.4
Percentage of CapitalizedContractCostAdditions38.534.235.0

cbb:FulfillmentCosts


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1.31.42.01.81.63.83.43.5
Percentage of CapitalizedContractCostAdditions34.235.041.736.735.656.761.863.6

cbb:CapitalizedContractCostAdditions us-gaap:CapitalizedContractCost, us-gaap:StatementBusinessSegments

cbb:CostofAcquisition, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2.32.22.32.52.52.52.31.81.6
Percentage of CapitalizedContractCostAdditions59.057.957.552.151.055.634.332.729.1

cbb:CostofAcquisition, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.10.30.30.30.60.40.60.30.4
Percentage of CapitalizedContractCostAdditions2.67.97.56.212.28.99.05.57.3

cbb:FulfillmentCost, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-31
Value0.60.40.5
Percentage of CapitalizedContractCostAdditions15.410.512.5

cbb:FulfillmentCosts, cbb:EntertainmentandCommunications


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.90.90.90.90.93.23.03.1
Percentage of CapitalizedContractCostAdditions23.722.518.818.420.047.854.556.4

cbb:FulfillmentCosts, cbb:ItServicesAndHardware


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.40.51.10.90.70.60.40.4
Percentage of CapitalizedContractCostAdditions10.512.522.918.415.69.07.37.3

cbb:CapitalizedContractCostAdditions us-gaap:StatementBusinessSegments

cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value3.23.13.23.43.43.45.54.84.7
Percentage of CapitalizedContractCostAdditions82.181.680.070.869.475.682.187.385.5

cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.70.70.81.41.51.11.20.70.8
Percentage of CapitalizedContractCostAdditions17.918.420.029.230.624.417.912.714.5

cbb:DefinedBenefitPlanAmortizationOfPriorServiceCostCreditAndActuarialNetGainLoss us-gaap:RetirementPlanType

cbb:DefinedBenefitPlanAmortizationOfPriorServiceCostCreditAndActuarialNetGainLoss

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


None
Period End2020-03-312019-09-302019-03-312018-09-30
Value-0.4-0.2-0.20.3
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCreditAndActuarialNetGainLoss100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


None
Period End2020-03-312019-09-302019-03-312018-09-30
Value4.53.53.44.2
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCreditAndActuarialNetGainLoss-1125.0-1750.0-1700.01400.0

cbb:IncreaseDecreaseInInventoriesPrepaidExpensesAndOtherCurrentAssets

cbb:IncreaseDecreaseInInventoriesPrepaidExpensesAndOtherCurrentAssets


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.56.21.9-7.59.1-0.55.31.15.22.75.5-0.53.69.6-6.837-2.6-14.72.5
Percentage of IncreaseDecreaseInInventoriesPrepaidExpensesAndOtherCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cbb:NetIncomeLossAvailableToCommonStockHoldersBasicAndDiluted

cbb:NetIncomeLossAvailableToCommonStockHoldersBasicAndDiluted


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-10.8-10.4-36.6-23.2-16.2-8.1-29.5-32.6-20.3-16.4
Percentage of NetIncomeLossAvailableToCommonStockHoldersBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cbb:OtherComponentsOfPensionAndPostretirementBenefitPlansExpense

cbb:OtherComponentsOfPensionAndPostretirementBenefitPlansExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3.82.62.82.83.02.63.03.03.2
Percentage of OtherComponentsOfPensionAndPostretirementBenefitPlansExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0

cbb:OtherComponentsOfPensionAndPostretirementBenefitPlansExpenses

cbb:OtherComponentsOfPensionAndPostretirementBenefitPlansExpenses


None
Period End2020-09-302019-09-30
Value2600000.02800000.0
Percentage of OtherComponentsOfPensionAndPostretirementBenefitPlansExpenses100.0100.0

cbb:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementChargesAfterTax

cbb:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementChargesAfterTax


None
Period End2020-09-302020-06-302019-06-30
Value0900000.00
Percentage of OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementChargesAfterTax0.0100.00.0

cbb:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementChargesTax

cbb:OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementChargesTax


None
Period End2020-09-302020-06-30
Value0200000.0
Percentage of OtherComprehensiveIncomeLossDefinedBenefitPlanPensionSettlementChargesTax0.0100.0

cbb:PaymentsForRestructuringAndSeverance

cbb:PaymentsForRestructuringAndSeverance


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2.53.58.32.44.06.8
Percentage of PaymentsForRestructuringAndSeverance100.0100.0100.0100.0100.0100.0

cbb:PaymentsForRestructuringAndSeverance us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-31
Value1.63.17.6
Percentage of PaymentsForRestructuringAndSeverance64.088.691.6

us-gaap:OperatingSegments, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-31
Value0.90.40.7
Percentage of PaymentsForRestructuringAndSeverance36.011.48.4

cbb:PaymentsForRestructuringAndSeverance us-gaap:RestructuringCostAndReserve

us-gaap:EmployeeSeverance


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2.43.48.22.33.96.7
Percentage of PaymentsForRestructuringAndSeverance96.097.198.895.897.598.5

cbb:PaymentsToAcquirePropertyPlantAndEquipmentIncludingCostOfAcquisitions

cbb:PaymentsToAcquirePropertyPlantAndEquipmentIncludingCostOfAcquisitions


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value50565654567928338
Percentage of PaymentsToAcquirePropertyPlantAndEquipmentIncludingCostOfAcquisitions100.0100.0100.0100.0100.0100.0100.0100.0

cbb:PaymentsToAcquirePropertyPlantAndEquipmentIncludingCostOfAcquisitions us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cbb:EntertainmentandCommunications


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value44515147517227631
Percentage of PaymentsToAcquirePropertyPlantAndEquipmentIncludingCostOfAcquisitions87.290.390.588.590.490.597.483.0

us-gaap:OperatingSegments, cbb:ItServicesAndHardware


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6.55.55.46.15.47.47.46.5
Percentage of PaymentsToAcquirePropertyPlantAndEquipmentIncludingCostOfAcquisitions12.89.79.511.39.69.32.617.0

cbb:PercentageOfRevenueByForeignSubsidiaries

cbb:PercentageOfRevenueByForeignSubsidiaries


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.050.0500.050.050.0500.050.060.06
Percentage of PercentageOfRevenueByForeignSubsidiaries100.0100.00.0100.0100.0100.00.0100.0100.0100.0

cbb:SalesTaxesReleasedAmount

cbb:SalesTaxesReleasedAmount


None
Period End2020-09-302020-06-30
Value300000.02000000.0
Percentage of SalesTaxesReleasedAmount100.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1400000.01300000.01400000.01400000.01400000.01500000.01900000.01700000.01600000.01300000.0800000.01300000.0400000.0600000.0500000.0900000.0700000.0700000.01000000.01100000.01000000.01100000.01400000.01400000.01400000.01700000.01700000.01800000.01900000.01800000.02000000.02000000.01900000.01900000.02000000.02000000.02000000.01200000.02500000.02200000.03000000.01900000.0900000.0
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts

us-gaap:BusinessCombinationAcquisitionRelatedCosts


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value2.22.5299.00.20.63.04.3132.72.24.1121.70.60.00.0
Percentage of BusinessCombinationAcquisitionRelatedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-2.10.225-0.1-7.50.433-0.88.31017-7.8-5.0-2.527-19.28.86.9275.3-3.74.128-17.221-0.221-7.1-2.2-2.825-7.21211137.41.95.48.1-4.3-2.37.29.0
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostAmortization

us-gaap:CapitalizedContractCostAmortization


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value5.05.05.15.15.5-5.7-5.5-5.4-5.5
Percentage of CapitalizedContractCostAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostAmortization us-gaap:CapitalizedContractCost

cbb:CostofAcquisition


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2.42.42.42.91.8-2.4-1.9-1.8-1.9
Percentage of CapitalizedContractCostAmortization48.048.047.156.932.742.134.533.334.5

cbb:FulfillmentCost


None
Period End2020-09-302020-06-302020-03-31
Value2.62.62.7
Percentage of CapitalizedContractCostAmortization52.052.052.9

cbb:FulfillmentCosts


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2.62.72.23.7-3.3-3.6-3.6-3.6
Percentage of CapitalizedContractCostAmortization52.052.943.167.357.965.566.765.5

us-gaap:CapitalizedContractCostAmortization us-gaap:CapitalizedContractCost, us-gaap:StatementBusinessSegments

cbb:CostofAcquisition, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2.12.02.02.61.5-2.1-1.6-1.6-1.7
Percentage of CapitalizedContractCostAmortization42.040.039.251.027.336.829.129.630.9

cbb:CostofAcquisition, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.30.40.40.30.3-0.3-0.3-0.2-0.2
Percentage of CapitalizedContractCostAmortization6.08.07.85.95.55.35.53.73.6

cbb:FulfillmentCost, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-31
Value2.02.02.1
Percentage of CapitalizedContractCostAmortization40.040.041.2

cbb:FulfillmentCosts, cbb:EntertainmentandCommunications


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2.02.11.73.3-2.9-3.2-3.3-3.3
Percentage of CapitalizedContractCostAmortization40.041.233.360.050.958.261.160.0

cbb:FulfillmentCosts, cbb:ItServicesAndHardware


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.60.60.50.4-0.4-0.4-0.3-0.3
Percentage of CapitalizedContractCostAmortization12.011.89.87.37.07.35.65.5

us-gaap:CapitalizedContractCostAmortization us-gaap:StatementBusinessSegments

cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value4.14.04.14.34.8-5.0-4.8-4.9-5.0
Percentage of CapitalizedContractCostAmortization82.080.080.484.387.387.787.390.790.9

cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.91.01.00.80.7-0.7-0.7-0.5-0.5
Percentage of CapitalizedContractCostAmortization18.020.019.615.712.712.312.79.39.1

us-gaap:DeferredIncomeTaxesAndTaxCredits

us-gaap:DeferredIncomeTaxesAndTaxCredits


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-3.3-2.8-20.3-2.5-0.9-8.00.514-4.1-2.6-1.2-5.40.70.8340.110444.4
Percentage of DeferredIncomeTaxesAndTaxCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-300000.0-400000.0-200000.0-500000.0-400000.0-500000.0-400000.0
Percentage of DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-4500000.0-4500000.0-4500000.0-3400000.0-3500000.0-3400000.0-3400000.0
Percentage of DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit1500.01125.02250.0680.0875.0680.0850.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-600000.0-700000.0-600000.0-600000.0-600000.0-700000.0-600000.0-800000.0-700000.0-800000.0-800000.0-1100000.0-1200000.0-1100000.0-1100000.0-3600000.0-3700000.0-3700000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value000000000000000100000.00
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-2.7-0.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:PensionPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value7.17.27.37.77.77.57.88.78.76.26.26.56.56.56.56.86.96.8
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0.91.00.91.21.31.31.21.31.30.80.80.80.80.80.80.80.80.9
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value4.64.84.86.05.96.06.05.85.94.14.24.84.94.94.84.84.94.8
Percentage of DefinedBenefitPlanInterestCost511.1480.0533.3500.0453.8461.5500.0446.2453.8512.5525.0600.0612.5612.5600.0600.0612.5533.3

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0.70.80.61.21.31.21.21.71.91.11.10.90.90.90.9-1.5-1.6-1.5
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value2.03.22.01.71.71.91.61.51.42.12.36.72.72.82.72.82.82.8
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost285.7400.0333.3141.7130.8158.3133.388.273.7190.9209.1744.4300.0311.1300.0-186.7-175.0-186.7

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1 us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1

us-gaap:PensionPlansDefinedBenefit


None
Period End2020-09-302020-06-302019-06-30
Value0-1100000.00
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements10.0100.00.0

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value100000.0100000.0100000.0100000.0200000.0100000.0200000.0200000.0300000.00100000.00100000.00100000.0100000.0100000.00
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.00.0100.0100.0100.00.0

us-gaap:DefinedBenefitPlanSettlementsPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanSettlementsPlanAssets

us-gaap:PensionPlansDefinedBenefit


None
Period End2020-09-30
Value3.4
Percentage of DefinedBenefitPlanSettlementsPlanAssets100.0

us-gaap:DepreciationAmortizationAndAccretionNet

us-gaap:DepreciationAmortizationAndAccretionNet


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value717474757574797475505152474745464443353461
Percentage of DepreciationAmortizationAndAccretionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAmortizationAndAccretionNet us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


None
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-30
Value0.10.00.10.00.10.10.0
Percentage of DepreciationAmortizationAndAccretionNet0.10.00.10.00.10.10.0

us-gaap:DepreciationAmortizationAndAccretionNet us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value61646365646362636541
Percentage of DepreciationAmortizationAndAccretionNet85.786.386.186.185.385.479.085.186.980.6

us-gaap:OperatingSegments, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value10101010111016119.99.9
Percentage of DepreciationAmortizationAndAccretionNet14.213.713.913.714.714.421.014.813.119.4

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value100000.0100000.0-400000.0-100000.000100000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.00.00.0100.0

us-gaap:EmployeeBenefitsAndShareBasedCompensation

us-gaap:EmployeeBenefitsAndShareBasedCompensation


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-1.82.3-0.20.1-0.20.3-0.30.2-7.7-0.10.44.30.60.51.0-4.4-1.1-1.5-1.3-1.6-1.5-4.8-3.6-3.3-9.1-7.3-6.0-6.7-32.3-7.6-3.1-4.1-9.3-6.8-8.2-2.9-4.5-0.9-11.2-4.6-5.1-2.51.5
Percentage of EmployeeBenefitsAndShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeaseInterestPaymentOnLiability


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1100000.01100000.01100000.01400000.01300000.01200000.0
Percentage of FinanceLeaseInterestPaymentOnLiability100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value5.44.14.43.0999999999999992.13.0
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1000000.01500000.0-3700000.0900000.0-500000.0900000.0800000.0-2200000.01000000.0-1300000.0-1000000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss us-gaap:StatementBusinessSegments

cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1000000.01500000.0-3700000.0900000.0-500000.0900000.0800000.0-2200000.01000000.0-1300000.0-1000000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentLiabilities

us-gaap:IncreaseDecreaseInOtherCurrentLiabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value13-0.7-25.12510-4.5-17.918-1.4-15.99.65.12.11.97.113-19.82.8-6.8-15.42.41211-10.2
Percentage of IncreaseDecreaseInOtherCurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-2900000.0-4300000.0-2700000.0-1600000.0-2900000.0-2500000.0-2300000.0-200000.02900000.0-1300000.0-500000.0-300000.0-900000.0-100000.0-800000.0-800000.01500000.01100000.0-500000.0300000.0-1000000.0-700000.0-100000.0600000.0-500000.0-400000.0-400000.0-700000.0200000.0100000.0-400000.0-8800000.0
Percentage of IncreaseDecreaseInOtherNoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities

us-gaap:IncreaseDecreaseInOtherNoncurrentLiabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value3600000.02700000.0600000.0-1700000.0-1300000.0-600000.0-600000.0-8200000.0100000.0300000.0-400000.0-7900000.0-6500000.0500000.03300000.02200000.0-2100000.03800000.0-300000.0-3600000.02900000.0400000.01700000.0-400000.0-4800000.0300000.0-2300000.03500000.0-2400000.0700000.0-9400000.0-1500000.0
Percentage of IncreaseDecreaseInOtherNoncurrentLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInReceivables

us-gaap:IncreaseDecreaseInReceivables


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-6.921-29.054-10.910-82.362179.3-6.5-0.54.6-10.8-14.67.35.522-17.2-4.010-6.81.9-12.215-1.922-4.97.03.9-6.57.53.4220.44.13.918-15.4147.310-6.1
Percentage of IncreaseDecreaseInReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0000000000000200000.00100000.0600000.0400000.00400000.0400000.00100000.00900000.01000000.001500000.000-100000.03600000.02800000.03200000.0300000.02900000.02800000.02000000.0-600000.03000000.03100000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements0.00.00.00.00.00.00.00.00.00.00.00.00.0100.00.0100.0100.0100.00.0100.0100.00.0100.00.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet

us-gaap:InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-2300000.0-2300000.0-1400000.0-1100000.0-600000.0-200000.0-300000.0-600000.0-600000.0
Percentage of InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossOnContractTermination us-gaap:BusinessAcquisition

us-gaap:LossOnContractTermination

cbb:BrookfieldInfrastructureGroup


None
Period End2020-03-13
Value24
Percentage of LossOnContractTermination100.0

us-gaap:NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1

us-gaap:NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value1.62.10.33.10.59.80.76.10.09.80.06.90.83.07.11.41.61.3
Percentage of NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value4000000.02400000.03100000.02700000.02400000.03200000.0
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax


None
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-12-312010-09-302010-06-30
Value3.2-14.72.40.00.1-5.50.00.06.60.00.0-7.70.01.1-45.40.00.026227.3-9.20.00.0-57.90.01.4-25.10.00.0
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax100.0100.0100.00.0100.0100.00.00.0100.00.00.0100.00.0100.0100.00.00.0100.0100.0100.0100.00.00.0100.00.0100.0100.00.00.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


None
Period End2020-09-302020-06-302019-12-312019-09-302019-06-30
Value3.2-14.72.40.00.1
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax100.0100.0100.00.0100.0

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax

us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax


None
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302013-12-312013-09-302013-06-30
Value1.0-4.40.70.00.03.60.00.0-4.00.00.6-25.00.00.0-48.0134.2
Percentage of OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax100.0100.0100.00.00.0100.00.00.0100.00.0100.0100.00.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value2000000.02800000.0-6900000.01600000.0-1000000.01500000.01600000.0-3900000.01700000.0-2500000.0-1800000.0100000.0100000.000000-100000.00-300000.0200000.0-300000.0-100000.000000100000.0-200000.0-100000.0100000.000
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.00.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0100.00.00.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedTranslationAdjustment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2000000.02800000.0-6900000.01600000.0-1000000.01500000.01600000.0-3900000.01700000.0-2500000.0-1800000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value-500000.0-500000.0-500000.0-500000.0-400000.0-500000.0-500000.0-600000.0-600000.0-600000.0-600000.0-700000.0-800000.0-700000.0-700000.0-2300000.0-2400000.0-2400000.0-2300000.0-2400000.0-2600000.0-2400000.0-2400000.0-2600000.0-2400000.0-2400000.0-2400000.0-2400000.0-2300000.0-2000000.0-2000000.0-2100000.0-2000000.0-2100000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value-100000.0-200000.0-100000.0-100000.0-200000.0-200000.0-100000.0-200000.0-100000.0-200000.0-200000.0-400000.0-400000.0-400000.0-400000.0-1300000.0-1200000.0-1300000.0-1400000.0-1400000.0-1300000.0-1400000.0-1400000.0-1200000.0-1400000.0-1400000.0-1400000.08900000.0-1300000.0-1200000.0-1200000.08300000.0-1200000.0-1100000.0
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-500000.0-700000.0-10100000.01400000.0-3000000.0-7800000.0-3100000.0-4900000.01600000.0-1500000.00000
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-500000.0-700000.0-10100000.01400000.0-3000000.0-7800000.0-3100000.0-4900000.01100000.0-1500000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.068.8100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-100000.0-200000.0-3000000.0500000.0-900000.0-2300000.0-1000000.0-1500000.0500000.0-400000.00000
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1800000.0-1700000.0-1100000.0-900000.0-400000.0-200000.0-200000.0-400000.0-500000.000
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-03-31
Value-500000.0-600000.0-300000.0-200000.0-200000.00100000.0500000.0-200000.00
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax100.0100.0100.0100.0100.00.0100.0100.0100.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value9.7-6.8-12.78.8-1.1-3.51.2-9.86.8-0.51.78.32.92.9-65.3761.41.51.5-5.91.46.01.4-44.21.20.61.840249.02.6-7.22.32.71.4
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9.7-6.8-12.78.8-1.1-3.51.2-9.86.8-0.51.7
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value-3700000.0-3700000.0-3700000.0-3000000.0-2900000.0-3000000.0-3000000.0-4100000.0-4100000.0-4100000.0-4100000.0-3600000.0-3600000.0-3600000.0-3500000.0-3900000.0-3800000.0-3900000.0-3900000.0-4200000.0-4300000.0-6900000.0-4100000.0-3900000.0-3600000.0-3000000.0-4200000.0-4300000.0-4400000.0-4000000.0-4800000.0-4200000.0-4200000.0-4800000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value-1.1-1.2-1.0-0.9-1.0-0.90.81.21.11.21.22.01.92.02.02.12.12.22.12.32.33.82.31.72.11.82.4-17.62.42.32.8-16.52.22.8
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-1300000.02400000.0-400000.01600000.01600000.0500000.01300000.0200000.01900000.0-600000.02000000.0-1400000.0-4100000.01800000.01200000.0700000.0-600000.02100000.01500000.0200000.01300000.03200000.0-2400000.0-5000000.0500000.0200000.0400000.04600000.01100000.0900000.0100000.0200000.0600000.01500000.0-900000.04000000.0100000.0-500000.0100000.04900000.0-1000000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.11.70.0-0.2-0.3-0.10.1-0.10.1-0.10.10.30.10.1-0.50.10.10.60.10.10.00.10.10.10.05.70.00.00.00.00.00.00.00.40.10.3-0.1-0.4-0.1-0.3-0.1
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302013-12-312012-12-312012-09-302011-12-312011-09-302010-12-312010-09-30
Value0.20.30.00.00.10.60.10.78.52.10.4170.60.20.52.76.51.90.00.00.00.90.00.3200.00.00.09.70.2
Percentage of PaymentsOfDebtIssuanceCosts100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.0100.0100.00.00.00.0100.0100.0

us-gaap:PaymentsToAcquireIntangibleAssets us-gaap:SubsequentEventType

us-gaap:PaymentsToAcquireIntangibleAssets

us-gaap:SubsequentEvent


None
Period End2020-10-01
Value4500000.0
Percentage of PaymentsToAcquireIntangibleAssets100.0

us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:PaymentsToAcquireProductiveAssets


None
Period End2020-09-302019-09-30
Value6156
Percentage of PaymentsToAcquireProductiveAssets100.0100.0

us-gaap:PaymentsToAcquireProductiveAssets us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cbb:EntertainmentandCommunications


None
Period End2020-09-302019-09-30
Value5751
Percentage of PaymentsToAcquireProductiveAssets93.790.5

us-gaap:OperatingSegments, cbb:ItServicesAndHardware


None
Period End2020-09-302019-09-30
Value3.95.4
Percentage of PaymentsToAcquireProductiveAssets6.39.5

us-gaap:PensionAndOtherPostretirementBenefitContributions us-gaap:RetirementPlanType

us-gaap:PensionAndOtherPostretirementBenefitContributions

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value1.71.11.51.21.51.92.71.91.61.5
Percentage of PensionAndOtherPostretirementBenefitContributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value2.90.51.41.91.41.18.21.51.31.5
Percentage of PensionAndOtherPostretirementBenefitContributions170.645.593.3158.393.357.9303.778.981.2100.0

us-gaap:PreferredStockDividendRatePercentage

us-gaap:PreferredStockDividendRatePercentage


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value000.06750000.06750000.06750000.06750000.06750000.06750000.06750000.0675
Percentage of PreferredStockDividendRatePercentage0.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value00-1100000.0000-800000.0200000.0-100000.00-2000000.0200000.0100000.00-1100000.0-100000.03500000.0400000.0-500000.0000-600000.0-200000.0500000.0300000.0-1700000.0000-2300000.0-1800000.0-1400000.0-700000.01100000.0-15700000.0200000.0-200000.0-400000.0100000.0-300000.0400000.0-1300000.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities0.00.0100.00.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value6.010312.0-9.65.3-3.80.41940.00.00.00.00.0-89.566-9.5-13.52817-2.6-24.17.5-93.2-2.4-27.3-4.1146-108.8542.0
Percentage of ProceedsFromRepaymentsOfLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.14.04.53.43.52.72.93.22.61.61.01.32.11.71.82.22.92.41.92.02.22.22.12.23.62.22.42.32.44.02.62.34.23.63.83.33.93.63.14.42.83.94.1
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value5.05.84.33.42.92.72.74.54.03.53.55.42.82.9-73.61.71.4
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.24.13.22.52.52.52.53.63.53.53.5
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax64.070.774.473.586.292.692.680.087.5100.0100.0

us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterest


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.81.71.10.90.40.20.20.90.50.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax36.029.325.626.513.87.47.420.012.50.0

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities

us-gaap:RepaymentsOfLongTermDebtAndCapitalSecurities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7.16.06.28.14.24.74.54.43182.93.03962.22.12.12983369330211483583.3253423.15.25241.91.73.14313.34.04.02.52.83.23.07626.57822.9
Percentage of RepaymentsOfLongTermDebtAndCapitalSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCharges

us-gaap:RestructuringCharges


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.80.4150.51.31.83.33.44.60.33.53.6250.00.32.33.40.59.06.40.02.90.08.22.60.40.91.20.9120.00.00.08.50.05.2
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.0100.0

us-gaap:RestructuringCharges us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


None
Period End2020-06-302020-03-31
Value0.10.0
Percentage of RestructuringCharges25.00.0

us-gaap:RestructuringCharges us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cbb:EntertainmentandCommunications


None
Period End2020-06-302020-03-31
Value0.014
Percentage of RestructuringCharges0.097.4

us-gaap:OperatingSegments, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-31
Value0.80.30.4
Percentage of RestructuringCharges100.075.02.6

us-gaap:RestructuringCharges us-gaap:RestructuringCostAndReserve

cbb:LeaseAbandonment


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-06-302015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312010-06-30
Value0.00.00.00.00.00.80.10.20.0-1.30.00.0-0.62.81.73.3
Percentage of RestructuringCharges0.00.00.00.00.017.433.38.70.0-14.40.00.00.034.165.463.5

us-gaap:EmployeeSeverance


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312010-06-30
Value0.80.4151.31.83.30.20.92.20.73.50.00.05.40.91.8
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.066.739.164.77.854.70.00.065.934.634.6

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1.62.10.33.10.59.8
Percentage of RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1400000.04300000.01100000.01200000.02600000.01300000.0
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0

us-gaap:SeveranceCosts1 us-gaap:RestructuringCostAndReserve

us-gaap:SeveranceCosts1

us-gaap:EmployeeSeverance


None
Period End2020-03-31
Value0.7
Percentage of SeveranceCosts1100.0

us-gaap:SeveranceCosts1 us-gaap:StatementBusinessSegments

cbb:EntertainmentandCommunications


None
Period End2020-03-31
Value14
Percentage of SeveranceCosts12071.4

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardGross us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardGross

us-gaap:CommonStock


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0100000.0200000.0000200000.00100000.00200000.0
Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardGross0.0100.0100.00.00.00.0100.00.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross


None
Period End2020-03-312019-12-312019-03-312018-12-312018-09-30
Value0.00.00.00.20.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardGross0.00.00.0100.00.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.00.00.00.00.20.00.00.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardGross0.00.00.00.0100.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationForfeited

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationForfeited


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value001100000.0000800000.00100000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensationForfeited0.00.0100.00.00.00.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationForfeited us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value001100000.0000800000.00100000.002000000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensationForfeited0.00.0100.00.00.00.0100.00.0100.00.00.0

us-gaap:UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss

us-gaap:UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1700000.01400000.0-11700000.03000000.0-3300000.0-9900000.0-3800000.0-5200000.02100000.0
Percentage of UnrealizedGainLossOnInterestRateCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0

cbb:AccountsReceivableFromOneCustomerGreaterThanTenPercentage us-gaap:MajorCustomers

cbb:AccountsReceivableFromOneCustomerGreaterThanTenPercentage

cbb:VerizonCommunicationsInc


None
Period End2020-09-302020-06-302020-03-312019-12-312018-12-31
Value11.00.140.130.250.18
Percentage of AccountsReceivableFromOneCustomerGreaterThanTenPercentage100.0100.0100.0100.0100.0

cbb:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour

cbb:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour


None
Period End2020-09-30
Value85
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour100.0

cbb:LongTermDebtAndCapitalLeaseObligationGross

cbb:LongTermDebtAndCapitalLeaseObligationGross


None
Period End2020-09-302019-12-31
Value19551922
Percentage of LongTermDebtAndCapitalLeaseObligationGross100.0100.0

cbb:LongTermDebtAndCapitalLeaseObligationsGross

cbb:LongTermDebtAndCapitalLeaseObligationsGross


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value195319471922192619371935
Percentage of LongTermDebtAndCapitalLeaseObligationsGross100.0100.0100.0100.0100.0100.0

cbb:NumberOfCustomersExceedsTenPercentageOfAccountsReceivable

cbb:NumberOfCustomersExceedsTenPercentageOfAccountsReceivable


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1.01.01.0001.0
Percentage of NumberOfCustomersExceedsTenPercentageOfAccountsReceivable100.0100.0100.00.00.0100.0

cbb:OtherFinancingArrangementsCurrentPortion

cbb:OtherFinancingArrangementsCurrentPortion


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2000000.02000000.02200000.02000000.02000000.02000000.01100000.0800000.0
Percentage of OtherFinancingArrangementsCurrentPortion100.0100.0100.0100.0100.0100.0100.0100.0

cbb:OtherFinancingArrangementsNonCurrentPortion

cbb:OtherFinancingArrangementsNonCurrentPortion


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1300000.01600000.01900000.03200000.03400000.03600000.02000000.02300000.0
Percentage of OtherFinancingArrangementsNonCurrentPortion100.0100.0100.0100.0100.0100.0100.0100.0

cbb:OtherInstallmentFinancingArrangements

cbb:OtherInstallmentFinancingArrangements


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4242424343444444
Percentage of OtherInstallmentFinancingArrangements100.0100.0100.0100.0100.0100.0100.0100.0

cbb:OtherInstallmentFinancingArrangements us-gaap:FairValueByMeasurementBasis

us-gaap:EstimateOfFairValueFairValueDisclosure


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value5250465545434643
Percentage of OtherInstallmentFinancingArrangements124.2119.8109.8127.6103.799.1105.697.8

cbb:PoleLicenseAgreementObligation

cbb:PoleLicenseAgreementObligation


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value37373738383838390.0
Percentage of PoleLicenseAgreementObligation100.0100.0100.0100.0100.0100.0100.0100.00.0

cbb:ReceivablesFacilityAmountOutstanding

cbb:ReceivablesFacilityAmountOutstanding


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1791651641311411431751761440.00.00.00.089233346170.02.626191121141041060.0100545244190.0
Percentage of ReceivablesFacilityAmountOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0

cbb:ReceivablesFacilityMaximumBorrowingAvailability

cbb:ReceivablesFacilityMaximumBorrowingAvailability


None
Period End2020-09-302019-12-31
Value200142
Percentage of ReceivablesFacilityMaximumBorrowingAvailability100.0100.0

cbb:ReceivablesFacilityMaximumBorrowingCapacity

cbb:ReceivablesFacilityMaximumBorrowingCapacity


None
Period End2020-06-302020-03-312018-12-312018-09-302014-12-312013-12-312013-09-302013-06-302013-03-31
Value200225225250120120120120105
Percentage of ReceivablesFacilityMaximumBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0

cbb:ReceivablesFacilityRemainingBorrowingCapacity

cbb:ReceivablesFacilityRemainingBorrowingCapacity


None
Period End2020-09-30
Value8100000.0
Percentage of ReceivablesFacilityRemainingBorrowingCapacity100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value20181614141313139.88.79.610109.79.59.99.8111212101011121211121213131213131212111211121417
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisitionSharePrice us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionSharePrice

cbb:BrookfieldInfrastructureGroup


None
Period End2020-03-052019-12-21
Value14.510.5
Percentage of BusinessAcquisitionSharePrice100.0100.0

cbb:MacquarieInfrastructurePartnersV


None
Period End2020-03-13
Value15.5
Percentage of BusinessAcquisitionSharePrice0.0

us-gaap:CapitalizedContractCostNet

us-gaap:CapitalizedContractCostNet


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-01-01
Value2526282929303032333232323230
Percentage of CapitalizedContractCostNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostNet us-gaap:CapitalizedContractCost

cbb:CostofAcquisition


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-01-01
Value1717171716161515141313121314
Percentage of CapitalizedContractCostNet67.464.761.658.655.955.650.346.942.440.940.139.841.946.1

cbb:FulfillmentCost


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value8.49.51012
Percentage of CapitalizedContractCostNet32.635.338.441.4

cbb:FulfillmentCosts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-01-01
Value9.5101213131517191919191816
Percentage of CapitalizedContractCostNet35.338.441.444.144.449.753.157.659.159.960.258.153.9

us-gaap:CapitalizedContractCostNet us-gaap:CapitalizedContractCost, us-gaap:StatementBusinessSegments

cbb:CostofAcquisition, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-01-01
Value1515151414141313121111111212
Percentage of CapitalizedContractCostNet60.156.953.750.747.847.743.540.636.836.035.535.837.841.5

cbb:CostofAcquisition, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-01-01
Value1.92.12.22.32.42.42.12.01.91.61.51.31.31.4
Percentage of CapitalizedContractCostNet7.47.87.87.98.07.96.86.25.64.94.64.04.14.6

cbb:FulfillmentCost, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value4.65.76.88.0
Percentage of CapitalizedContractCostNet17.821.224.227.4

cbb:FulfillmentCost, cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value3.83.84.04.1
Percentage of CapitalizedContractCostNet14.714.114.214.0

cbb:FulfillmentCosts, cbb:EntertainmentandCommunications


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-01-01
Value5.76.88.09.3101214171717171715
Percentage of CapitalizedContractCostNet21.224.227.431.133.440.645.350.452.353.454.053.149.0

cbb:FulfillmentCosts, cbb:ItServicesAndHardware


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-01-01
Value3.84.04.13.93.32.82.52.42.22.12.01.61.5
Percentage of CapitalizedContractCostNet14.114.214.013.010.99.17.87.16.86.56.25.04.9

us-gaap:CapitalizedContractCostNet us-gaap:StatementBusinessSegments

cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-01-01
Value2021212223242527292828292927
Percentage of CapitalizedContractCostNet77.978.177.978.178.981.184.185.987.288.388.989.890.990.5

cbb:ItServicesAndHardware


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-01-01
Value5.75.96.26.46.35.74.94.54.33.83.63.32.92.9
Percentage of CapitalizedContractCostNet22.121.922.121.921.118.915.914.112.811.711.110.29.19.5

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value8.87.010116.59.33.9153969.7
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent us-gaap:BalanceSheetLocation

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:OtherNoncurrentLiabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value26262627272728
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-1100000.0-1200000.0-1300000.0-1300000.01400000.01500000.01600000.01700000.01700000.01800000.01900000.01900000.08000000.08200000.08300000.0-8500000.0-2300000.0-1700000.0-1600000.01700000.0-1900000.0-1600000.0-3000000.03200000.0-3400000.0-5600000.0-6000000.06300000.0-6700000.0-6700000.07100000.07500000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


None
Period End2020-09-302020-06-302019-12-31
Value868559
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0

us-gaap:DeferredTaxAssetsNetNoncurrent

us-gaap:DeferredTaxAssetsNetNoncurrent


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value8059595847476014131950556264108132177182168174236300268259333339376396399407392399410423371390406422393
Percentage of DeferredTaxAssetsNetNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear us-gaap:RetirementPlanTaxStatus, us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear

us-gaap:QualifiedPlan, us-gaap:PensionPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value5.06.06.06.03.03.03.03.04.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear us-gaap:RetirementPlanType

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value8.08.08.08.08.09.011119.0
Percentage of DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear160.0133.3133.3133.3266.7300.0366.7366.7225.0

us-gaap:DepositsAssetsCurrent us-gaap:BalanceSheetLocation

us-gaap:DepositsAssetsCurrent

us-gaap:OtherCurrentAssets


None
Period End2020-09-30
Value1700000.0
Percentage of DepositsAssetsCurrent100.0

us-gaap:DerivativeLiabilitiesCurrent us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:DerivativeLiabilitiesCurrent

us-gaap:InterestRateContract, us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value9300000.09200000.09300000.05700000.05300000.04200000.01700000.01200000.0
Percentage of DerivativeLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesCurrent us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis

us-gaap:InterestRateContract, us-gaap:EstimateOfFairValueFairValueDisclosure


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value9300000.09200000.09300000.05700000.05300000.04200000.01700000.01200000.0
Percentage of DerivativeLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesNoncurrent us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:DerivativeLiabilitiesNoncurrent

us-gaap:InterestRateContract, us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1820211316147.43.8
Percentage of DerivativeLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesNoncurrent us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis

us-gaap:InterestRateContract, us-gaap:EstimateOfFairValueFairValueDisclosure


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1820211316147.43.8
Percentage of DerivativeLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value6241434949374242443039283527312535273031323728373237303841445252474839524548424939
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value636869737878
Percentage of FinanceLeaseLiability100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-31
Value13151314150.80.0
Percentage of FinanceLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.00.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-31
Value50525659632.30.0
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.00.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value25313133
Percentage of FinanceLeaseRightOfUseAsset100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4743393632292521189.5202056-43.1-24.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3633302825232017158.9151651-40.2-23.5
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization76.176.677.577.678.179.180.481.384.193.772.781.492.393.397.9

us-gaap:TechnologyBasedIntangibleAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2.92.72.42.22.01.71.51.31.00.2
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization6.16.26.16.06.15.85.95.95.52.1

us-gaap:TradeNames


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value8.47.56.56.05.24.43.52.81.90.4
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization17.817.216.516.415.815.113.712.810.44.2

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


None
Period End2020-09-30
Value14
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear


None
Period End2020-09-30
Value3600000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


None
Period End2020-09-30
Value13
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


None
Period End2020-09-30
Value13
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


None
Period End2020-09-30
Value13
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1901891871921911911901901921412123164171165
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1401391381401401401401391401161517147154154
Percentage of FiniteLivedIntangibleAssetsGross73.473.573.573.373.373.373.473.473.381.871.774.189.489.893.2

us-gaap:TechnologyBasedIntangibleAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value9.89.79.69.99.99.99.89.99.99.9
Percentage of FiniteLivedIntangibleAssetsGross5.15.15.15.25.25.25.15.25.27.0

us-gaap:TradeNames


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value40404041414140404115
Percentage of FiniteLivedIntangibleAssetsGross21.421.421.321.521.521.521.421.421.511.2

us-gaap:InterestPayableCurrent

us-gaap:InterestPayableCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value242624262427242625263329132111128.38.02311241332223331353152375141584558455845594640
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateCashFlowHedgeDerivativeAtFairValueNet us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementBasis

us-gaap:InterestRateCashFlowHedgeDerivativeAtFairValueNet

us-gaap:InterestRateContract, us-gaap:EstimateOfFairValueFairValueDisclosure


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2729301922188.85.0
Percentage of InterestRateCashFlowHedgeDerivativeAtFairValueNet100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LettersOfCreditOutstandingAmount


None
Period End2020-09-302019-12-312018-12-31
Value12108.2
Percentage of LettersOfCreditOutstandingAmount100.0100.0100.0

us-gaap:LineOfCredit

us-gaap:LineOfCredit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-312015-12-312015-03-312014-12-312013-12-31
Value5765555745531518500.00.00.00.00.040
Percentage of LineOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity


None
Period End2020-09-302017-12-312017-10-022017-09-302016-12-312015-12-312014-12-312013-12-31
Value143200200150150175150160
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value21232122232322201816181812108.27.59814141312121213111212125087.26.613131312131717161615
Percentage of LongTermDebtAndCapitalLeaseObligationsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent us-gaap:DebtInstrument

cbb:TrancheBTermLoandue2024


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value6.06.06.06.06.06.06.06.06.04.56.06.00.0
Percentage of LongTermDebtAndCapitalLeaseObligationsCurrent27.825.527.526.925.625.926.829.732.826.833.032.60.0

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value4042404343444446
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidExpenseCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value30323128292831302722232217192015151516131313141517121411111213111314141111141210.029
Percentage of PrepaidExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserve

us-gaap:RestructuringReserve


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value5.06.79.82.93.54.66.8108.5117.514132324111.11.52.63.820231712151416121317192024131315201813
Percentage of RestructuringReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserve us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-31
Value0.10.10.00.00.30.00.7
Percentage of RestructuringReserve2.01.50.00.02.90.06.2

us-gaap:RestructuringReserve us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cbb:EntertainmentandCommunications


None
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-31
Value4.96.59.62.48.6127.5
Percentage of RestructuringReserve98.097.098.082.884.384.867.0

us-gaap:OperatingSegments, cbb:ItServicesAndHardware


None
Period End2020-06-302020-03-312019-12-312018-12-312017-12-312016-12-31
Value0.10.20.51.32.23.0
Percentage of RestructuringReserve1.52.017.212.715.226.8

us-gaap:RestructuringReserve us-gaap:RestructuringCostAndReserve

cbb:LeaseAbandonment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value0.10.20.30.40.50.60.70.80.90.10.10.20.20.20.80.91.01.61.92.44.35.16.06.38.26.55.56.06.87.38.15.96.36.87.24.4
Percentage of RestructuringReserve1.52.010.311.410.98.86.99.48.01.30.70.90.81.872.760.038.542.19.410.324.441.538.044.148.852.040.735.134.335.433.845.046.044.435.523.4

us-gaap:EmployeeSeverance


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5.06.69.62.63.14.16.29.57.7107.414132323110.20.51.52.15.98.5107.19.77.38.55.97.8101212147.27.48.51114
Percentage of RestructuringReserve100.098.598.089.788.689.191.293.190.692.098.799.399.399.199.298.218.233.357.755.329.136.358.557.761.451.050.647.257.863.764.162.659.255.054.055.657.676.6

us-gaap:RestructuringReserveCurrent

us-gaap:RestructuringReserveCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value5.06.77.62.93.54.56.49.66.58.85.6124.712137.40.10.20.90.91.22.43.52021115.67.88.59.45.55.87.610.010126.26.49.3
Percentage of RestructuringReserveCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:RevenueRemainingPerformanceObligation


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value35363637
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligationPercentage us-gaap:ProductOrService

us-gaap:RevenueRemainingPerformanceObligationPercentage

cbb:SEAUSContractRevenue


None
Period End2020-09-30
Value80.0
Percentage of RevenueRemainingPerformanceObligationPercentage100.0

Line plots across dimensions of each concept


us-gaap:SharesIssued
us-gaap:StatementEquityComponents
(None,)
None
Operating Margin
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
None
TTM Greenblatt ROC
_
(None,)
None
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None, 'cbb:EntertainmentandCommunications')
None
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None, 'cbb:ItServicesAndHardware')
None
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:TimingOfTransferOfGoodOrService
(None,)
None
us-gaap:OperatingIncomeLoss
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
None
us-gaap:Assets
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
None
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:Goodwill
us-gaap:StatementBusinessSegments
(None,)
None
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
None
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
None