CDW


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:CommonStockSharesOutstanding

us-gaap:CommonStockSharesAuthorized

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

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

us-gaap:Revenues

us-gaap:CostOfGoodsAndServicesSold

us-gaap:GrossProfit

us-gaap:SellingGeneralAndAdministrativeExpense

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

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:Assets

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:AccountsReceivableNetCurrent

us-gaap:InventoryNet

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:LiabilitiesNoncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:DepreciationDepletionAndAmortization
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

cdw:NetChangeInAccountsPayableInventoryFinancing

cdw:RevenuenetbyProductandServicePercentage
us-gaap:ProductOrService

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:AdvertisingExpense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:DepreciationAmortizationAndAccretionNet

us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:IncreaseDecreaseInAccountsPayableTrade

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestPaidNet
us-gaap:DerivativeInstrumentRisk
us-gaap:InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:RepaymentsOfLinesOfCredit
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

cdw:AccountsPayableInventoryFinancing

cdw:LongtermDebtCurrentMaturitiesGross

cdw:LongtermDebtExcludingCurrentMaturitiesNetofDeferredFinancingCostsDiscountorPremium
cdw:InventoryFinancingAgreements
cdw:OtherInventoryFinancingAgreements
cdw:InventoryFinancingAgreements
cdw:RevolvingLoanFinancingAgreement

us-gaap:AccountsPayableTradeCurrent

us-gaap:AccruedAdvertisingCurrent

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:LongtermDebtType
us-gaap:AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:DebtInstrumentCarryingAmount
us-gaap:LongtermDebtType
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DebtInstrumentFairValue

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DerivativeAssets
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:LongtermDebtType
us-gaap:LongtermDebtWeightedAverageInterestRate
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OtherReceivablesNetCurrent

us-gaap:PreferredStockSharesAuthorized

us-gaap:RestrictedCash

us-gaap:RevenueRemainingPerformanceObligation

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:CommonStockValue ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄11111111111111111NA1NANANANANANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock▁▂▂▃▄▄▆▇▇█142143143145146147150151151153NANANANA172NANANANANANANANANANANA
us-gaap:CommonStockSharesIssued ▁▁▁▂▂▂▃▃▃▄▃▄▅███▂142143143145146147150151151153152155158172172172145NA145NANANANANANANA
us-gaap:CommonStockSharesOutstanding ▁▁▁▂▂▂▃▃▃▄▃▄▅███▂142143143145146147150151151153152155158172172172145NA145NANANANANANANA
us-gaap:CommonStockSharesAuthorized ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄10001000100010001000100010001000100010001000100010001000100010001000NA286NANANANANANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 144NA147148149NA153153154NA156159162172NA166146146NA145145NANANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 142NA144145147NA150151152NA153156159169NA166145145NA145145NANANANANA
us-gaap:EarningsPerShareBasic ▇███▆▆▇▇▅▇▅▆▃▃▃▁▃▂▂▂▂▁1.181.291.391.351.041.071.221.140.831.280.840.90.360.30.35-0.010.320.190.230.260.250.08NANANANA
us-gaap:EarningsPerShareDiluted ▇▇██▆▆▇▇▅▇▅▆▃▃▃▁▃▂▂▂▂▁1.161.271.371.331.021.051.21.120.821.260.830.890.350.30.35-0.010.320.190.230.260.250.07NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▇▇█▇▆▆▇▆▅▅▆▅▄▂▂▃▃▂▂▂▂▁▂▂▂▁43894536490746293957407443734186360637523933389132562652271328642779241126012623258423192479258124122129
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ContractWithCustomerSalesChannel,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:SalesChannelCorporate,cdw:CorporateSegmentPrivateSectorBusiness▇█▇▇▅▆▅▅▃▃▂▃▁1911196519131883173618361706173315651599155215801440NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ContractWithCustomerSalesChannel,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:SalesChannelEducation,cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare▂▂█▇▁▂█▆▁▁▆▆▁476430807773400425793712397395691704393NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ContractWithCustomerSalesChannel,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:SalesChannelGovernment,cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare▄▆█▄▃▄▅▃▂▅▅▃▁568659793578488546639493418619591523374NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ContractWithCustomerSalesChannel,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:SalesChannelHealthcare,cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare▇██▇▄▄▄▄▃▃▂▂▁480503500488441443442429414411410404385NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ContractWithCustomerSalesChannel,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:SalesChannelOther,us-gaap:AllOtherSegments▇█▆▆▆▄▄▅▅▃▂▁▁561587507528535461451487483418381363369NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:TotalHardware,cdw:CorporateSegmentPrivateSectorBusiness▇██▇▅▆▅▅▃▂▃▃▁1513154315281496138314451378138012511231125312381146NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:TotalHardware,cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare▃▄█▆▂▃▆▅▁▃▅▄▁121012871711152310631121153113371008117413831329958NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:CorporateSegmentPrivateSectorBusiness▇█▇▇▅▆▅▅▃▃▂▃▁1911196519131883173618361706173315651599155215801440NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare▄▄█▆▂▃▆▅▂▃▅▅▁1525159321001840133014141875163512301426169316321153NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:AllOtherSegments▇█▆▆▆▄▄▅▅▃▂▁▁561587507528535461451487483418381363369NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments,us-gaap:TimingOfTransferOfGoodOrService us-gaap:OperatingSegments,cdw:CorporateSegmentPrivateSectorBusiness,cdw:TransferredAtPointInTimePrincipal▇█▇▇▅▆▅▅▃▃▃▃▁1741178517431708158116751571158314261464142314371314NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments,us-gaap:TimingOfTransferOfGoodOrService us-gaap:OperatingSegments,cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare,cdw:TransferredAtPointInTimePrincipal▄▄█▆▂▃▇▅▂▃▅▅▁1404150219391725124313121764153711711342159715391105NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments,us-gaap:TimingOfTransferOfGoodOrService us-gaap:OperatingSegments,us-gaap:AllOtherSegments,cdw:TransferredAtPointInTimePrincipal▇█▅▆▆▄▄▅▅▃▂▁▁499516443465474410402441433378340325331NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,country:US,cdw:CorporateSegmentPrivateSectorBusiness▇█▇▇▄▆▄▄▁▂▁▁190719601910188117321834170417311564159815511578NANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,country:US,cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare▃▄█▆▂▂▆▄▁▃▅▄152515932100184013301414187516351230142616931632NANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:NonUs,us-gaap:AllOtherSegments▇█▅▆▆▄▄▅▅▃▂▁555579499519527454444479473412375356NANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerSalesChannel cdw:SalesChannelCorporate▇█▇▇▅▆▅▅▃▃▂▃▁1911196519131883173618361706173315651599155215801440NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerSalesChannel cdw:SalesChannelEducation▂▂█▇▁▂█▆▁▁▆▆▁476430807773400425793712397395691704393NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerSalesChannel cdw:SalesChannelGovernment▄▆█▄▃▄▅▃▂▅▅▃▁568659793578488546639493418619591523374NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerSalesChannel cdw:SalesChannelHealthcare▇██▇▄▄▄▄▃▃▂▂▁480503500488441443442429414411410404385NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerSalesChannel cdw:SalesChannelOther▇█▆▆▆▄▄▅▅▃▂▁▁561587507528535461451487483418381363369NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService cdw:NetcommProducts▁▆▇▇▄▇█▃▂▃▆▆▁456551567563512556581498482496544540458NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService cdw:NotebooksMobileDevices▅▅█▇▄▄▅▅▂▃▄▃▁1111109413251232977101111141068858907964912735NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService cdw:OtherHardware█▇█▆▃▃▇▆▂▁▄▃▁949916946876782766908879751720814778711NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService cdw:SoftwareProducts▇▇█▆▅▆▅▅▃▄▄▅▁666686707650593628607605505576544589447NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService cdw:TotalHardware▅▆█▇▄▄▆▅▂▃▄▄▁3456357339243725313732293558338229122997320131202639NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical country:US▅▆█▇▃▄▆▅▂▃▄▄▁3830395244054108342736183926370431313338355635332891NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical us-gaap:NonUs▇█▅▆▆▄▄▅▅▃▂▁▁558584502521530456447481475413376358364NANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimingOfTransferOfGoodOrService cdw:TransferredAtPointInTimePrincipal▆▆█▇▄▄▆▅▂▃▄▄▁4011417244904254363537394060387133403476365035993027NANANANANANANANANANANANANA
us-gaap:Revenues ▇▇█▇▆▆▇▆▅▅▆▅▄▂▂▃▃▂▂▂▂▁▂▂▂▁43894536490746293957407443734186360637523933389132562652271328642779241126012623258423192479258124122129
us-gaap:CostOfGoodsAndServicesSold ▆▇█▇▅▅▆▆▄▅▅▅▃▁36323759409138563285338136593490300232243391335327722227NA240523272009NA219021571934NA216020111779
us-gaap:GrossProfit ▇▇█▇▆▆▆▆▅▅▅▅▄▂▂▃▃▂▂▂▂▂▂▂▂▁756777816773672693713695603614642641552425448458451402425432426384412420400350
us-gaap:SellingGeneralAndAdministrativeExpense █▆▆▅▅▅▅▄▄▃▄▄▃▁510443444420404402390381362347352363347260NA332266251NA257259251NA252243229
us-gaap:OperatingIncomeLoss ▆▇█▇▅▆▇▆▄▅▆▅▃▂▃▁▃▂▂▂▂▁▂▂▂▁2452833203002282422742652042212432311691351429215312013013913610311113912891
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:CorporateSegmentPrivateSectorBusiness▃█▅█▄▆▃▆▃▃▂▃▁127154138157134143127141124128121127112NANANANANANANANANANANANANA
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare▄▄█▅▂▃▆▄▂▃▅▄▁1121011681297688138113718612210460NANANANANANANANANANANANANA
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:SmallBusiness▇█▇▆▅▅▅▅▄▃▂▃▁27292726242424242220171916NANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense █▄▁▇▇▇▇▇▇▇▇▇▇▇3-9-1711001000000NA000NA000NA000
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▆▇██▅▆▇▇▄▅▆▆▁▁2112362602611912062382291651842061957380NA-47344NA635915NA54-53-3
us-gaap:IncomeTaxExpenseBenefit ▅▆▇▇▅▆▆▆▅▁█▆▃▄435059643847545639-1077541629NA-22616NA25224NA17-181
us-gaap:IncomeTaxesPaidNet ▁▅▇█▁▅▆█▁█▆▇▁▁9698710311608210710106739069NANANA1NANANA0NANANA-36
us-gaap:ComprehensiveIncomeNetOfTax ▄█▇▇▅▅▆▅▅▇▅▅▂▁1262211871841561361801461442011431586347NA04325NA413512NA30-340
us-gaap:NetIncomeLoss ▇███▇▇▇▇▆█▆▆▄▄▄▂▃▃▃▃▃▂▃▃▁▂167185201196152159183173127195129141575060-24628333836101937-34-4
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▆▇██▆▆▇▇▅█▅▅▁▁1671852011961521591831731271951291415750NANANA28NANANA10NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:Assets █▇▇▇▆▅▆▆▅▄▅▅▄▂▂▂▂▁▁▂▂▁▂▂822279997703792176797167737573307027695671017041677459125924603860205822570059855935572159495965NANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▇▆▅▆▆▅▄▅▅▄▂▂▂▂▁▁▂▂▁▂▂822279997703792176797167737573307027695671017041677459125924603860205822570059855935572159495965NANA
us-gaap:StockholdersEquity ▆▇▇▇▇▇█▇▇▇▆▆▇▆▅▅▂▂▂▂▂▁▁▁88996093593692797511601068996982806849907754711659209163136985110-7-35NANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital███▇▇▇▇▇▇▆▆▆▆▅▅▅▁▁▁▁▁▁▁▁311430953073304730252996297029532928291129032890287426912688268522112210220922022196219121862179NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:AssetsCurrent █▇▇▇▇▆▆▆▅▅▅▅▄▂▂▂▂▂▁▂▂▁▁▁466543344295442541323796394938443479337834923396309722472213228522331986181420601964170118791862NANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▅▄▄▅▇▅▆▃▅▄▃▂▆▇▅█▄▄▁▅▄▁▃▁▁▂2141541661942852052551002211449779251306188350179147371931583699254473
us-gaap:AccountsReceivableNetCurrent █▇▇▇▇▆▆▆▅▅▅▅▄▂▂▂▂▂▂▂▁▁▂▂314930022899296727252671265026122274232023112335198513351451131013901264126512771238109312541257NANA
us-gaap:InventoryNet █▇▇█▆▄▄▆▄▄▆▅▄▂▂▂▂▂▁▂▁▂▁▁672611603652590454481576485449549513493388382353378358314346321346321315NANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▇▇██▇▆▇▇▇▅▆▅▅▂▁▂▄▂▁▂▂▁▁▂18717119320517814919218118812715313112753466310851345163453448NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:PropertyPlantAndEquipmentNet ▇█▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▂▂▂331363171163155156147150153161162160162129131129132134142139142146154147NANA
us-gaap:Goodwill ██▇▇▇▆▆▆▇▇▆▆▆▁▁▁▁▁▁▁▁▁▁▁252925532515252425282462246924722488247924772469245922192220222222072208220922092208220922082207NANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▁▁▁▂▂▂▂▃▃▃▃▄▄▆▆▆▆▇▇▇▇███540594616660696712758802859897937976101512861328136514031443147815161557159916361672NANA
us-gaap:OtherAssetsNoncurrent ▄▄▃▄▅▆▇█▆▆▅▅▆▁▁▁▁▁▁▁▁▁▁▁2523203035395060474032384011111112222NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:LiabilitiesCurrent ██▇▇▇▆▆▆▅▅▅▅▄▂▂▂▂▂▁▂▂▁▂▁364734913241346032152803280328202582251425582555222214181402149614451312114813161297110713411172NANA
us-gaap:LongTermDebtCurrent ▂▂▂▂▂▂▂▂▂▂▂▂▂▂▃▇▁▁▂▁▁▁█33342525252532382525411818154517013040000201NANANA
us-gaap:OtherAccruedLiabilitiesCurrent █▇▄▅▅▃▃▃▃▂▂▂▂▁▂▁▁▁▁▁▁▁▁▁5484912913503462322092122041801841611551051301169193968587919287NANA
us-gaap:AccruedIncomeTaxesCurrent █▆▄▄▆▄▂▂▄▂▃▂▂▃▁▁▁▂▁▁▁▂▁▁135885159101551122561531122748605170791106NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:LiabilitiesNoncurrent ▂▂▂▂▂▁▁▁▁▁▃▂▂▃▃▃▆▆▆▇▇▇▇█368535473527352535373389341034413448345937363637364437393810388243664346441545704586460346154827NANA
us-gaap:LongTermDebtNoncurrent ▄▂▂▂▂▁▁▁▂▂▃▂▂▁▁▂▆▆▇████34383283325932533257318331873201320932103388327732623157320532393710368037313871387138713865NANANA
us-gaap:OtherLiabilitiesNoncurrent ▅▇█▆▅▆▆▇▄▄▁▁▁▃▃▃▄▄▄▆▅▅▃▃557175625364656649523230324141405049526058574544NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:StockholdersEquity ▆▇▇▇▇▇█▇▇▇▆▆▇▆▅▅▂▂▂▂▂▁▁▁88996093593692797511601068996982806849907754711659209163136985110-7-35NANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital███▇▇▇▇▇▇▆▆▆▆▅▅▅▁▁▁▁▁▁▁▁311430953073304730252996297029532928291129032890287426912688268522112210220922022196219121862179NANA
us-gaap:CommonStockValue ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄11111111111111111NA1NANANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▃▄▄▄▄▅█▇▆▆▄▅▆▅▄▄▄▃▃▂▂▁▁▁-2067-2018-1985-1973-1972-1892-1703-1780-1854-1834-1997-1927-1835-1928-1971-2024-1998-2044-2073-2106-2143-2180-2191-2210NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▃▁▂▂▂▃▃▅▄▄▃▂███████████-159-117-154-139-127-130-108-105-78-95-101-115-133-10-6-3-5-201-10-2-4NANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅█▆▄▆▇▆▃▅▇▂▁█▆223344267162252303270110222338626369246NANANA208NANANA223NANANA141
us-gaap:NetCashProvidedByUsedInInvestingActivities █▁▇▇▅▇███████▇-25-181-31-30-88-32-19-17-15-22-21-17-19-30NANANA-8NANANA-8NANANA-16
us-gaap:NetCashProvidedByUsedInFinancingActivities ▆▅▃▄▇▂▆▄▆▃█▅▁▆-130-181-263-225-80-319-97-207-131-271-20-164-362-97NANANA-89NANANA-278NANANA-88
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅█▆▄▆▇▆▃▅▇▂▁█▆223344267162252303270110222338626369246NANANA208NANANA223NANANA141
us-gaap:NetIncomeLoss ▇███▇▇▇▇▆█▆▆▄▄▄▂▃▃▃▃▃▂▃▃▁▂167185201196152159183173127195129141575060-24628333836101937-34-4
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▆▇██▆▆▇▇▅█▅▅▁▁1671852011961521591831731271951291415750NANANA28NANANA10NANANANA
us-gaap:DepreciationDepletionAndAmortization █▄▄▃▃▄▃▄▄▃▃▃▃▁9169686564666566666565656452NA525252NA535352NA5150NA
 us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems us-gaap:CorporateNonSegment▇▇▇▁▇██▇▇▇▇▇▇171818-16172321202020202019NANANANANANANANANANANANANA
 us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:CorporateSegmentPrivateSectorBusiness███▁█████████222221-21211920202120202020NANANANANANANANANANANANANA
 us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare█▅▅▁▄▄▄▄▄▄▄▄▄371415-13121111111111111111NANANANANANANANANANANANANA
us-gaap:IncreaseDecreaseInInventories ▆▄▃▆█▃▁▇▆▁▅▄▅▄661-4663134-25-959572-993217406NANANA43NANANA25NANANA15
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities █▁▇▇▅▇███████▇-25-181-31-30-88-32-19-17-15-22-21-17-19-30NANANA-8NANANA-8NANANA-16
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▁█▂▁▁▂▁▁▁▁▁▁▁251613124193219171522211719NANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▆▅▃▄▇▂▆▄▆▃█▅▁▆-130-181-263-225-80-319-97-207-131-271-20-164-362-97NANANA-89NANANA-278NANANA-88
us-gaap:PaymentsForRepurchaseOfCommonStock ▄▅▅▅▅█▂▃▄▁▅▅▅▁140163161155177289566710901741841750NANANA0NANANA0NANANA0
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value11111111111111111111111111111
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Par Or Stated Value Per Share

Shares Issued

us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value142143143145146147150151151153160168172172
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value142143143145146147150151151153152155158160160163165168169170172172172172172172172145145
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value142143143145146147150151151153152155158160160163165168169170172172172172172172172145145
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000286
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value144147148149153153154156159162164166168171172173173172172166146146145145
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value142144145147150151152153156159162164167169171172170170169166145145145145
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1.181.291.391.351.041.071.221.140.831.280.840.90.360.640.780.710.470.530.890.630.320.30.330.510.30.35-0.010.320.190.230.260.250.08
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1.161.271.371.331.021.051.21.120.821.260.830.890.350.630.760.70.460.520.880.630.320.30.320.50.30.35-0.010.320.190.230.260.250.07
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value43894536490746293957407443734186360637523933389132562652271328642779241126012623258423192479258124122129
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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us-gaap:OperatingSegments, cdw:SalesChannelCorporate, cdw:CorporateSegmentPrivateSectorBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1911196519131883173618361706173315651599155215801440
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.543.339.040.743.945.139.041.443.442.639.540.644.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.543.339.040.743.945.139.041.443.442.639.540.644.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SalesChannelCorporate cdw:CorporateSegmentPrivateSectorBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SalesChannelEducation, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value476430807773400425793712397395691704393
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.89.516.416.710.110.418.117.011.010.517.618.112.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.89.516.416.710.110.418.117.011.010.517.618.112.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SalesChannelEducation cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SalesChannelGovernment, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value568659793578488546639493418619591523374
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.014.516.212.512.313.414.611.811.616.515.013.411.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.014.516.212.512.313.414.611.811.616.515.013.411.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SalesChannelGovernment cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SalesChannelHealthcare, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value480503500488441443442429414411410404385
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.911.110.210.511.210.910.110.311.511.010.410.411.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.911.110.210.511.210.910.110.311.511.010.410.411.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SalesChannelHealthcare cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SalesChannelOther, us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value561587507528535461451487483418381363369
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.812.910.311.413.511.310.311.613.411.29.79.311.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.812.910.311.413.511.310.311.613.411.29.79.311.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SalesChannelOther us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SalesChannelSmallBusiness, cdw:SmallBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value391391386377355362340329327308305315292
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.98.67.98.29.08.97.87.99.18.27.88.19.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.98.67.98.29.08.97.87.99.18.27.88.19.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SalesChannelSmallBusiness cdw:SmallBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, cdw:OtherProductsAndServices, cdw:CorporateSegmentPrivateSectorBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value21171817161616171616171616
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.40.40.40.40.40.40.40.50.40.40.40.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.40.40.40.40.40.40.40.50.40.40.40.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:OtherProductsAndServices cdw:CorporateSegmentPrivateSectorBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:OtherProductsAndServices, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7664434444544
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:OtherProductsAndServices cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:OtherProductsAndServices, cdw:SmallBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5555555555555
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.10.10.10.10.10.10.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.10.10.10.10.10.10.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:OtherProductsAndServices cdw:SmallBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:OtherProductsAndServices, us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2322322222221
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.00.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.00.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:OtherProductsAndServices us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:Services, cdw:CorporateSegmentPrivateSectorBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1001099799889483817879798175
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.42.02.12.22.31.91.92.22.12.02.12.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.42.02.12.22.31.91.92.22.12.02.12.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:Services cdw:CorporateSegmentPrivateSectorBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:Services, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value67485950424248373431393428
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.11.21.11.11.01.10.91.00.81.00.90.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.11.21.11.11.01.10.91.00.81.00.90.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:Services cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:Services, cdw:SmallBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value8767776766566
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.10.20.20.20.20.20.20.20.10.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.20.10.20.20.20.20.20.20.20.10.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:Services cdw:SmallBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:Services, us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value54798066594440424232333031
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.81.61.41.51.10.91.01.20.90.90.81.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.81.61.41.51.10.91.01.20.90.90.81.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:Services us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SoftwareProducts, cdw:CorporateSegmentPrivateSectorBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value276294269270247280228254219271202243202
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.36.55.55.86.36.95.26.16.17.25.26.36.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.36.55.55.86.36.95.26.16.17.25.26.36.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SoftwareProducts cdw:CorporateSegmentPrivateSectorBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SoftwareProducts, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value239251324262221246290255183216265263162
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.55.56.65.75.66.16.66.15.15.86.76.85.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.55.56.65.75.66.16.66.15.15.86.76.85.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SoftwareProducts cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SoftwareProducts, cdw:SmallBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value53524748484444424342374239
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.21.01.01.21.11.01.01.21.11.01.11.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.21.01.01.21.11.01.01.21.11.01.11.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SoftwareProducts cdw:SmallBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SoftwareProducts, us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value97876669775744535946383943
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.21.91.31.52.01.41.01.31.61.21.01.01.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.21.91.31.52.01.41.01.31.61.21.01.01.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SoftwareProducts us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:TotalHardware, cdw:CorporateSegmentPrivateSectorBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1513154315281496138314451378138012511231125312381146
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.534.031.132.335.035.531.533.034.732.831.931.835.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.534.031.132.335.035.531.533.034.732.831.931.835.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:TotalHardware cdw:CorporateSegmentPrivateSectorBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:TotalHardware, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value121012871711152310631121153113371008117413831329958
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.628.434.932.926.927.535.032.028.031.335.234.229.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.628.434.932.926.927.535.032.028.031.335.234.229.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:TotalHardware cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:TotalHardware, cdw:SmallBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value324325326316295305284273272253256261240
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.47.26.76.87.57.56.56.57.66.86.56.77.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.47.26.76.87.57.56.56.57.66.86.56.77.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:TotalHardware cdw:SmallBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:TotalHardware, us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value407416358389395357365389379337307291293
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.39.27.38.410.08.88.39.310.59.07.87.59.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.39.27.38.410.08.88.39.310.59.07.87.59.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:TotalHardware us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cdw:CorporateSegmentPrivateSectorBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1911196519131883173618361706173315651599155215801440
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.543.339.040.743.945.139.041.443.442.639.540.644.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.543.339.040.743.945.139.041.443.442.639.540.644.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:CorporateSegmentPrivateSectorBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1525159321001840133014141875163512301426169316321153
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.835.142.839.733.634.742.939.134.138.043.142.035.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.835.142.839.733.634.742.939.134.138.043.142.035.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SmallBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value391391386377355362340329327308305315292
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.98.67.98.29.08.97.87.99.18.27.88.19.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.98.67.98.29.08.97.87.99.18.27.88.19.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SmallBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value561587507528535461451487483418381363369
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.812.910.311.413.511.310.311.613.411.29.79.311.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.812.910.311.413.511.310.311.613.411.29.79.311.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, cdw:CorporateSegmentPrivateSectorBusiness, cdw:TransferredAtPointInTimeAgent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value107112111118104109851019288829281
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.52.52.32.62.62.72.02.42.62.42.12.42.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.52.52.32.62.62.72.02.42.62.42.12.42.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:CorporateSegmentPrivateSectorBusiness cdw:TransferredAtPointInTimeAgent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:CorporateSegmentPrivateSectorBusiness, cdw:TransferredAtPointInTimePrincipal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1741178517431708158116751571158314261464142314371314
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.739.435.536.940.041.135.937.839.539.036.236.940.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.739.435.536.940.041.135.937.839.539.036.236.940.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:CorporateSegmentPrivateSectorBusiness cdw:TransferredAtPointInTimePrincipal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:CorporateSegmentPrivateSectorBusiness, cdw:TransferredOverTimePrincipal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value62675957505249484646464945
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.51.21.21.31.31.11.21.31.21.21.31.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.51.21.21.31.31.11.21.31.21.21.31.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:CorporateSegmentPrivateSectorBusiness cdw:TransferredOverTimePrincipal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare, cdw:TransferredAtPointInTimeAgent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value52577965465064554141535237
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.31.61.41.21.21.51.31.11.11.41.31.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.31.61.41.21.21.51.31.11.11.41.31.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare cdw:TransferredAtPointInTimeAgent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare, cdw:TransferredAtPointInTimePrincipal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1404150219391725124313121764153711711342159715391105
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.033.139.537.331.432.240.436.732.535.840.639.634.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax32.033.139.537.331.432.240.436.732.535.840.639.634.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare cdw:TransferredAtPointInTimePrincipal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare, cdw:TransferredOverTimePrincipal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value68338249415046421742434110
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.60.71.71.11.01.21.11.00.51.11.11.10.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.60.71.71.11.01.21.11.00.51.11.11.10.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare cdw:TransferredOverTimePrincipal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SmallBusiness, cdw:TransferredAtPointInTimeAgent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value22201920191816171615141614
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.50.40.40.50.50.40.40.50.40.40.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.50.40.40.50.50.40.40.50.40.40.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SmallBusiness cdw:TransferredAtPointInTimeAgent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SmallBusiness, cdw:TransferredAtPointInTimePrincipal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value366368364355335341321309309291289296275
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.48.17.47.78.58.47.37.48.67.87.47.68.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.48.17.47.78.58.47.37.48.67.87.47.68.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SmallBusiness cdw:TransferredAtPointInTimePrincipal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cdw:SmallBusiness, cdw:TransferredOverTimePrincipal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2221022212122
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.10.00.00.10.00.10.00.10.00.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.00.10.00.00.10.00.10.00.10.00.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SmallBusiness cdw:TransferredOverTimePrincipal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments, cdw:TransferredAtPointInTimeAgent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value131715131312129154868
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.40.30.30.30.30.30.20.40.10.20.20.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.40.30.30.30.30.30.20.40.10.20.20.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:AllOtherSegments cdw:TransferredAtPointInTimeAgent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments, cdw:TransferredAtPointInTimePrincipal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value499516443465474410402441433378340325331
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.411.49.010.012.010.19.210.512.010.18.78.410.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.411.49.010.012.010.19.210.512.010.18.78.410.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:AllOtherSegments cdw:TransferredAtPointInTimePrincipal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments, cdw:TransferredOverTimePrincipal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value49524750473836363435323130
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.21.01.11.21.00.80.91.00.90.80.80.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.21.01.11.21.00.80.91.00.90.80.80.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:AllOtherSegments cdw:TransferredOverTimePrincipal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, country:US, cdw:CorporateSegmentPrivateSectorBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value190719601910188117321834170417311564159815511578
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.543.238.940.643.845.039.041.443.442.639.440.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.543.238.940.643.845.039.041.443.442.639.440.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments country:US cdw:CorporateSegmentPrivateSectorBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, country:US, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value152515932100184013301414187516351230142616931632
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.835.142.839.733.634.742.939.134.138.043.142.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.835.142.839.733.634.742.939.134.138.043.142.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments country:US cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, country:US, cdw:SmallBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value391391386377355362340329327308305315
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.98.67.98.29.08.97.87.99.18.27.88.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.98.67.98.29.08.97.87.99.18.27.88.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments country:US cdw:SmallBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, country:US, us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value677886689667
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.20.20.20.20.20.20.20.30.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.20.20.20.20.20.20.20.30.20.20.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments country:US us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:NonUs, cdw:CorporateSegmentPrivateSectorBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value352231221111
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.00.10.00.10.10.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.00.10.00.10.10.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:NonUs cdw:CorporateSegmentPrivateSectorBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:NonUs, us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value555579499519527454444479473412375356
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.612.810.211.213.311.210.211.513.111.09.59.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.612.810.211.213.311.210.211.513.111.09.59.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:NonUs us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerSalesChannel

cdw:SalesChannelCorporate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1911196519131883173618361706173315651599155215801440
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.543.339.040.743.945.139.041.443.442.639.540.644.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax43.543.339.040.743.945.139.041.443.442.639.540.644.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:SalesChannelCorporate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:SalesChannelEducation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value476430807773400425793712397395691704393
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.89.516.416.710.110.418.117.011.010.517.618.112.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.89.516.416.710.110.418.117.011.010.517.618.112.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:SalesChannelEducation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:SalesChannelGovernment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value568659793578488546639493418619591523374
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.014.516.212.512.313.414.611.811.616.515.013.411.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.014.516.212.512.313.414.611.811.616.515.013.411.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:SalesChannelGovernment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:SalesChannelHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value480503500488441443442429414411410404385
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.911.110.210.511.210.910.110.311.511.010.410.411.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.911.110.210.511.210.910.110.311.511.010.410.411.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:SalesChannelHealthcare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:SalesChannelOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value561587507528535461451487483418381363369
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.812.910.311.413.511.310.311.613.411.29.79.311.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.812.910.311.413.511.310.311.613.411.29.79.311.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:SalesChannelOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:SalesChannelSmallBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value391391386377355362340329327308305315292
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.98.67.98.29.08.97.87.99.18.27.88.19.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.98.67.98.29.08.97.87.99.18.27.88.19.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:SalesChannelSmallBusiness100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

cdw:Desktops



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value384414448431303327341345303329306308263
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.89.19.19.37.78.07.88.28.48.87.87.98.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.89.19.19.37.78.07.88.28.48.87.87.98.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:Desktops100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:EnterpriseAndDataStorageIncludingDrives



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value240296283273290285293264256280281291234
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.56.55.85.97.37.06.76.37.17.57.17.57.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.56.55.85.97.37.06.76.37.17.57.17.57.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:EnterpriseAndDataStorageIncludingDrives100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:NetcommProducts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value456551567563512556581498482496544540458
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.412.211.612.212.913.713.311.913.413.213.813.914.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.412.211.612.212.913.713.311.913.413.213.813.914.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:NetcommProducts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:NotebooksMobileDevices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1111109413251232977101111141068858907964912735
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax25.324.127.026.624.724.825.525.523.824.224.523.522.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax25.324.127.026.624.724.825.525.523.824.224.523.522.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:NotebooksMobileDevices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:OtherHardware



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value949916946876782766908879751720814778711
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.620.219.318.919.818.820.821.020.819.220.720.021.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.620.219.318.919.818.820.821.020.819.220.720.021.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:OtherHardware100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:OtherProductsAndServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value35313230292828292827292827
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.70.70.70.70.70.60.70.80.70.70.70.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.70.70.70.70.70.60.70.80.70.70.70.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:OtherProductsAndServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:Services



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value230245243223196188178168161150157152141
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.35.45.04.85.04.64.14.04.54.04.03.94.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.35.45.04.85.04.64.14.04.54.04.03.94.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:Services100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:SoftwareProducts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value666686707650593628607605505576544589447
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.215.114.414.115.015.413.914.514.015.413.815.213.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.215.114.414.115.015.413.914.514.015.413.815.213.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:SoftwareProducts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:TotalHardware



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3456357339243725313732293558338229122997320131202639
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax78.878.880.080.579.379.381.480.880.779.981.480.281.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax78.878.880.080.579.379.381.480.880.779.981.480.281.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:TotalHardware100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:Video



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value314300353348271281319325259262290289235
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.26.67.27.56.96.97.37.87.27.07.47.47.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.26.67.27.56.96.97.37.87.27.07.47.47.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:Video100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementGeographical

country:US



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3830395244054108342736183926370431313338355635332891
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax87.387.189.888.786.688.889.888.586.889.090.490.888.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax87.387.189.888.786.688.889.888.586.889.090.490.888.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NonUs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value558584502521530456447481475413376358364
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.712.910.211.313.411.210.211.513.211.09.69.211.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.712.910.211.313.411.210.211.513.211.09.69.211.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NonUs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TimingOfTransferOfGoodOrService

cdw:TransferredAtPointInTimeAgent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value195208225217183191179183165149158167141
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.44.64.64.74.64.74.14.44.64.04.04.34.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.44.64.64.74.64.74.14.44.64.04.04.34.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:TransferredAtPointInTimeAgent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:TransferredAtPointInTimePrincipal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4011417244904254363537394060387133403476365035993027
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax91.492.091.591.991.891.892.892.592.692.792.892.593.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax91.492.091.591.991.891.892.892.592.692.792.892.593.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:TransferredAtPointInTimePrincipal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:TransferredOverTimePrincipal



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value18215519115813914313413010012612412487
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.23.43.93.43.53.53.13.12.83.43.23.22.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.23.43.93.43.53.53.13.12.83.43.23.22.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cdw:TransferredOverTimePrincipal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value43894536490746293957407443734186360637523933389132562652271328642779241126012623258423192479258124122129
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Sales Revenue Net

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value36323759409138563285338136593490300232243391335327722914309330542592286029332779229825582758260922272405232720092190215719342160201117792006
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax82.882.983.483.383.083.083.783.483.385.986.286.285.10.00.00.00.00.00.00.00.00.00.00.084.084.083.883.383.583.583.483.783.483.50.0

Gross Profit

us-gaap:GrossProfit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-09-30
Value756777816773672693713695603614642641552577614610524557567534456491507496425448458451402425432426384412420400350368
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.217.116.616.717.017.016.316.616.716.416.316.517.00.00.00.00.00.00.00.00.00.00.00.016.016.516.016.216.716.416.516.516.616.616.316.616.50.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value510443444420404402390381362347352363347336334344329338321290275290285273260332266251257259251252243229235
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.69.89.19.110.29.98.99.110.19.38.99.310.70.00.00.00.00.00.00.00.00.00.00.09.811.69.610.49.810.010.89.810.110.80.0

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-09-30
Value2452833203002282422742652042212432311691972372231611792042051511641841881351429215312013013913610311113912891104
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.66.36.56.55.86.06.36.35.75.96.25.95.20.00.00.00.00.00.00.00.00.00.00.05.15.23.25.55.05.05.35.34.54.55.45.34.30.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-36-35-35-32-31-35-33-35-34-31-31-32-31-31-30-29
Percentage of OperatingIncomeLoss-14.6-12.6-11.2-10.7-13.9-14.4-12.3-13.2-16.9-14.2-13.0-14.0-18.6-15.8-12.8-13.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.8-0.8-0.7-0.7-0.8-0.9-0.8-0.8-1.0-0.8-0.8-0.8-1.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cdw:CorporateSegmentPrivateSectorBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value127154138157134143127141124128121127112183120117
Percentage of OperatingIncomeLoss51.854.443.352.358.859.146.353.261.157.949.755.066.093.050.552.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.93.42.83.43.43.52.93.43.53.43.13.33.40.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:CorporateSegmentPrivateSectorBusiness6.77.97.38.37.87.87.58.18.08.07.88.07.80.00.00.0

us-gaap:OperatingSegments, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value112101168129768813811371861221046081120108
Percentage of OperatingIncomeLoss45.735.652.543.133.236.350.242.635.139.150.245.235.841.150.548.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.23.42.81.92.23.22.72.02.33.12.71.90.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare7.46.38.07.05.76.27.46.95.86.17.26.45.30.00.00.0

us-gaap:OperatingSegments, cdw:SmallBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value27292726242424242220171916161817
Percentage of OperatingIncomeLoss11.110.38.58.910.710.28.89.310.99.37.38.49.88.47.67.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.60.60.60.60.60.60.60.60.60.50.50.50.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cdw:SmallBusiness7.07.57.07.06.96.87.17.56.86.75.86.15.70.00.00.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1435211925211921191814121216109
Percentage of OperatingIncomeLoss6.012.36.86.411.28.97.08.29.78.25.95.57.58.24.24.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.80.40.40.60.50.40.50.50.50.40.30.40.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:AllOtherSegments2.66.04.33.64.84.74.34.54.14.33.83.53.40.00.00.0

Interest Expense

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value3-9-17110010000000010-184410000000000000
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1-0.2-0.40.00.00.00.00.0-0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.00.00.00.0-0.00.00.00.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value2112362602611912062382291651842061957316219818712314124617287808913780-4734463591554-53-30
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 RevenueFromContractWithCustomerExcludingAssessedTax4.85.25.35.64.85.15.55.54.64.95.35.02.30.00.00.00.00.00.00.00.00.00.00.03.0-0.22.61.82.42.30.72.1-2.2-0.10.0

Income Loss From Continuing Operations Before Income Taxes Domestic

Income Loss From Continuing Operations Before Income Taxes Foreign

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value435059643847545639-10775416597270465295633228335029-226162522417-181
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.01.11.21.41.01.21.31.41.1-0.32.01.40.50.00.00.00.00.00.00.00.00.00.00.01.1-0.11.00.71.00.90.20.7-0.80.1

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value969871031160821071010673906941011256829411945178102910-36
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.21.51.82.20.31.51.92.60.32.81.92.30.20.00.00.00.00.00.00.00.00.00.00.00.40.10.0-1.7

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value126221187184156136180146144201143158637911482707312811243465090470432541351230-340
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.94.93.84.03.93.44.13.54.05.43.64.12.00.00.00.00.00.00.00.00.00.00.00.01.8-0.01.61.11.61.40.61.2-1.40.0

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-09-30
Value167185201196152159183173127195129141571031251177789150108545155865060-24628333836101937-34-40
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.84.14.14.23.93.94.24.13.55.23.33.61.80.00.00.00.00.00.00.00.00.00.00.01.92.2-0.11.71.21.31.41.40.50.81.4-1.4-0.20.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value16718520119615215918317312719512914157103125117778915010854515586502810
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.9100.1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.84.14.14.23.93.94.24.13.55.23.33.61.80.00.00.00.00.00.00.00.00.00.00.01.91.20.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value822279997703792176797167737573307027695671017041677469486772688767176755674162516088609961076045591259246038602058225700598559355721594959655943
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value822279997703792176797167737573307027695671017041677469486772688767176755674162516088609961076045591259246038602058225700598559355721594959655943
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value8899609359369279751160106899698280684990710459901013103910951075995975936894844754711659209163136985110-7-35-43-44262
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.812.012.111.812.113.615.714.614.214.111.412.113.415.014.614.715.516.216.015.916.015.414.614.012.812.010.93.52.82.41.60.90.2-0.1-0.6-0.70.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value-159-117-154-139-127-130-108-105-78-95-101-115-133-139-115-104-68-61-45-22-27-16-11-6-10-6-3-5-201-10-2-4-2-21-73
Percentage of StockholdersEquity-17.9-12.3-16.5-14.9-13.7-13.4-9.3-9.8-7.9-9.8-12.6-13.6-14.7-13.4-11.7-10.3-6.6-5.6-4.2-2.3-2.8-1.8-1.3-0.8-1.4-0.9-0.5-2.5-1.20.31.3-3.5-1.928.812.45.147.7-27.9
Percentage of Assets-1.9-1.5-2.0-1.8-1.7-1.8-1.5-1.4-1.1-1.4-1.4-1.6-2.0-2.0-1.7-1.5-1.0-0.9-0.7-0.4-0.5-0.3-0.2-0.1-0.2-0.1-0.1-0.1-0.00.00.0-0.0-0.0-0.0-0.1-0.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value31143095307330473025299629702953292829112903289028742857284328312817280627932729271827112704269826912688268522112210220922022196219121862179216621552140
Percentage of StockholdersEquity350.1322.3328.6325.6326.2307.3256.0276.3293.8296.2360.1340.4316.8273.3287.1279.4270.9256.1259.7274.1278.7289.6302.5319.4356.6377.7407.11057.91349.61618.42243.34299.020674.5-29946.6-6138.0-4980.9-4821.9816.5
Percentage of Assets37.938.739.938.539.441.840.340.341.741.940.941.042.441.142.041.141.941.641.443.744.744.544.344.645.545.444.536.738.038.836.837.038.336.736.536.50.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-312010-12-31
Value1111111111111111111111111111111
Percentage of StockholdersEquity0.20.10.10.20.20.20.10.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.71.0-19.2-3.2
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value-2067-2018-1985-1973-1972-1892-1703-1780-1854-1834-1997-1927-1835-1673-1738-1715-1710-1651-1674-1712-1717-1760-1800-1848-1928-1971-2024-1998-2044-2073-2106-2143-2180-2191-2210-2208-2178-1805
Percentage of StockholdersEquity-232.4-210.2-212.3-210.8-212.7-194.1-146.8-166.6-186.0-186.6-247.6-227.0-202.3-160.1-175.6-169.3-164.4-150.7-155.7-172.0-176.1-188.0-201.4-218.9-255.5-277.1-306.8-956.0-1248.4-1518.7-2144.6-4195.5-20572.630017.86225.65075.94874.3-688.6
Percentage of Assets-25.1-25.2-25.8-24.9-25.7-26.4-23.1-24.3-26.4-26.4-28.1-27.4-27.1-24.1-25.7-24.9-25.5-24.4-24.8-27.4-28.2-28.9-29.5-30.6-32.6-33.3-33.5-33.2-35.1-36.4-35.2-36.1-38.1-36.8-37.1-37.10.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value466543344295442541323796394938443479337834923396309732382997307528162790273427142485245325162415224722132285223319861814206019641701187918621702
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets56.754.255.855.953.853.053.552.549.548.649.248.245.746.644.344.641.941.340.643.440.840.241.240.038.037.437.937.134.131.834.433.129.731.631.228.6

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-312008-12-31
Value2141541661942852052551002211449779251263118129248379733544734435722730618835017914737193158369925447336678894
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.61.92.22.53.72.93.51.43.12.11.41.13.73.81.71.93.70.61.45.47.35.65.93.85.23.25.83.02.50.73.22.70.61.70.40.00.00.60.00.00.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value314930022899296727252671265026122274232023112335198521682019208217802017186017121448156114731526133514511310139012641265127712381093125412571091
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets38.337.537.637.535.537.335.935.632.433.432.533.229.331.229.830.226.529.927.627.423.825.624.125.222.624.521.723.121.722.221.320.919.121.121.118.4

Inventory Net

us-gaap:InventoryNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value672611603652590454481576485449549513493452451487460393411436357337423449388382353378358314346321346321315292
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.27.67.88.27.76.36.57.96.96.57.77.37.36.56.77.16.95.86.17.05.95.56.97.46.66.45.96.36.25.55.85.46.15.45.34.9

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value18717119320517814919218118812715313112711813811511414413541585486525346631085134516345344835
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.32.12.52.62.32.12.62.52.71.82.21.91.91.72.01.71.72.12.00.71.00.91.40.90.90.81.01.80.90.60.91.10.80.60.80.6

Land

Machinery And Equipment Gross

Property Plant And Equipment Gross

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value331363171163155156147150153161162160162163162163168175154134135137131129129131129132134142139142146154147158
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.04.52.22.12.02.22.02.12.22.32.32.32.42.42.42.42.52.62.32.12.22.22.22.12.22.22.12.22.32.52.32.42.62.62.52.7

Investments In Affiliates Subsidiaries Associates And Joint Ventures

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value252925532515252425282462246924722488247924772469245924552467247524952500251722152215221722182220221922202222220722082209220922082209220822072209
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets30.831.932.731.932.934.433.533.735.435.634.935.136.335.336.435.937.137.037.335.436.436.436.336.737.537.536.836.737.938.836.937.238.637.137.037.2

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value540594616660696712758802859897937976101510551110116212251276132510891128116812071247128613281365140314431478151615571599163616721791
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.67.48.08.39.19.910.310.912.212.913.213.915.015.216.416.918.218.919.717.418.519.219.820.621.822.422.623.324.825.925.326.228.027.528.030.1

Finite Lived Intangible Assets Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value252320303539506047403238403634111212922321111111122222
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.40.50.60.70.80.70.60.50.50.60.50.50.20.20.20.10.00.00.10.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value364734913241346032152803280328202582251425582555222222802126217719431887187116251425146815271529141814021496144513121148131612971107134111721026
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets44.443.642.143.741.939.138.038.536.736.136.036.332.832.831.431.628.927.927.826.023.424.125.025.324.023.724.824.022.520.122.021.919.422.519.717.3

Long Term Debt Current

us-gaap:LongTermDebtCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value333425252525323825254118181818262627271515151515154517013040000201
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.0100.0
Percentage of Assets0.40.40.30.30.30.40.40.50.40.40.60.30.30.30.30.40.40.40.40.20.30.30.30.30.30.82.80.20.00.70.00.00.03.4

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value548491291350346232209212204180184161155149159152134166128113113113111113105130116919396858791928787
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.76.13.84.44.53.22.82.92.92.62.62.32.32.22.32.22.02.51.91.81.91.91.81.91.82.21.91.51.61.71.41.51.61.61.51.5

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value135885159101551122561531122701219510115470019486051707911064
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0
Percentage of Assets1.61.10.70.81.30.80.20.30.80.20.40.20.40.00.20.30.80.00.00.20.80.00.00.30.80.10.00.10.30.00.10.20.20.00.10.1

Other Liabilities Current

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value368535473527352535373389341034413448345937363637364436223655369637343772379336293687369536853671373938103882436643464415457045864603461548274960
Percentage of LiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets44.844.345.844.546.147.346.246.949.149.752.651.753.852.154.053.755.655.856.358.160.660.660.360.763.264.364.372.574.677.576.477.380.577.680.983.5

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value3438328332593253325731833187320132093210338832773262321532223214322532323240315431903174314631103157320532393710368037313871387138713865
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets41.841.042.341.142.444.443.243.745.746.147.746.548.146.347.646.748.047.948.150.552.452.051.551.553.454.153.661.663.265.564.765.267.765.0

Deferred Tax Liabilities Noncurrent

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value557175625364656649523230323739616170574746454442414140504952605857454440
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.91.00.80.70.90.90.90.70.80.50.40.50.50.60.90.91.00.90.80.80.80.70.70.70.70.70.80.80.91.01.01.00.80.70.7

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value8899609359369279751160106899698280684990710459901013103910951075995975936894844754711659209163136985110-7-35-43-44262
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.812.012.111.812.113.615.714.614.214.111.412.113.415.014.614.715.516.216.015.916.015.414.614.012.812.010.93.52.82.41.60.90.2-0.1-0.6-0.70.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value-159-117-154-139-127-130-108-105-78-95-101-115-133-139-115-104-68-61-45-22-27-16-11-6-10-6-3-5-201-10-2-4-2-21-73
Percentage of StockholdersEquity-17.9-12.3-16.5-14.9-13.7-13.4-9.3-9.8-7.9-9.8-12.6-13.6-14.7-13.4-11.7-10.3-6.6-5.6-4.2-2.3-2.8-1.8-1.3-0.8-1.4-0.9-0.5-2.5-1.20.31.3-3.5-1.928.812.45.147.7-27.9
Percentage of Assets-1.9-1.5-2.0-1.8-1.7-1.8-1.5-1.4-1.1-1.4-1.4-1.6-2.0-2.0-1.7-1.5-1.0-0.9-0.7-0.4-0.5-0.3-0.2-0.1-0.2-0.1-0.1-0.1-0.00.00.0-0.0-0.0-0.0-0.1-0.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value31143095307330473025299629702953292829112903289028742857284328312817280627932729271827112704269826912688268522112210220922022196219121862179216621552140
Percentage of StockholdersEquity350.1322.3328.6325.6326.2307.3256.0276.3293.8296.2360.1340.4316.8273.3287.1279.4270.9256.1259.7274.1278.7289.6302.5319.4356.6377.7407.11057.91349.61618.42243.34299.020674.5-29946.6-6138.0-4980.9-4821.9816.5
Percentage of Assets37.938.739.938.539.441.840.340.341.741.940.941.042.441.142.041.141.941.641.443.744.744.544.344.645.545.444.536.738.038.836.837.038.336.736.536.50.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-312010-12-31
Value1111111111111111111111111111111
Percentage of StockholdersEquity0.20.10.10.20.20.20.10.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.30.71.0-19.2-3.2
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value-2067-2018-1985-1973-1972-1892-1703-1780-1854-1834-1997-1927-1835-1673-1738-1715-1710-1651-1674-1712-1717-1760-1800-1848-1928-1971-2024-1998-2044-2073-2106-2143-2180-2191-2210-2208-2178-1805
Percentage of StockholdersEquity-232.4-210.2-212.3-210.8-212.7-194.1-146.8-166.6-186.0-186.6-247.6-227.0-202.3-160.1-175.6-169.3-164.4-150.7-155.7-172.0-176.1-188.0-201.4-218.9-255.5-277.1-306.8-956.0-1248.4-1518.7-2144.6-4195.5-20572.630017.86225.65075.94874.3-688.6
Percentage of Assets-25.1-25.2-25.8-24.9-25.7-26.4-23.1-24.3-26.4-26.4-28.1-27.4-27.1-24.1-25.7-24.9-25.5-24.4-24.8-27.4-28.2-28.9-29.5-30.6-32.6-33.3-33.5-33.2-35.1-36.4-35.2-36.1-38.1-36.8-37.1-37.10.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value11111111111111111111111111111
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value-2067-2018-1985-1973-1972-1892-1703-1780-1854-1834-1997-1927-1835-1673-1738-1715-1710-1651-1674-1712-1717-1760-1800-1848-1928-1971-2024-1998-2044-2073-2106-2143-2180-2191-2210-2208
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-25.1-25.2-25.8-24.9-25.7-26.4-23.1-24.3-26.4-26.4-28.1-27.4-27.1-24.1-25.7-24.9-25.5-24.4-24.8-27.4-28.2-28.9-29.5-30.6-32.6-33.3-33.5-33.2-35.1-36.4-35.2-36.1-38.1-36.8-37.1-37.1

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value-159-117-154-139-127-130-108-105-78-95-101-115-133-139-115-104-68-61-45-22-27-16-11-6-10-6-3-5-201-10-2-4-2
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-1.9-1.5-2.0-1.8-1.7-1.8-1.5-1.4-1.1-1.4-1.4-1.6-2.0-2.0-1.7-1.5-1.0-0.9-0.7-0.4-0.5-0.3-0.2-0.1-0.2-0.1-0.1-0.1-0.00.00.0-0.0-0.0-0.0-0.1-0.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value223344267162252303270110222338626369104186-114427-17195-7817784174-70246208223141
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.17.65.53.56.47.56.22.66.29.01.60.211.40.00.00.00.00.00.00.00.00.00.00.09.38.69.66.6

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value-25-181-31-30-88-32-19-17-15-22-21-17-19-22-17-14-11-46-284-12-10-108-14-11-30-8-8-16
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.6-4.0-0.6-0.7-2.2-0.8-0.5-0.4-0.4-0.6-0.6-0.4-0.60.00.00.00.00.00.00.00.00.00.00.0-1.1-0.4-0.4-0.8

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value-130-181-263-225-80-319-97-207-131-271-20-164-36266-17813-2063-146-20-6211-292-97-89-278-88
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.0-4.0-5.4-4.9-2.0-7.8-2.2-4.9-3.6-7.2-0.5-4.2-11.10.00.00.00.00.00.00.00.00.00.00.0-3.7-3.7-12.0-4.2

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value223344267162252303270110222338626369104186-114427-17195-7817784174-70246208223141
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.17.65.53.56.47.56.22.66.29.01.60.211.40.00.00.00.00.00.00.00.00.00.00.09.38.69.66.6

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-09-30
Value167185201196152159183173127195129141571031251177789150108545155865060-24628333836101937-34-40
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.84.14.14.23.93.94.24.13.55.23.33.61.80.00.00.00.00.00.00.00.00.00.00.01.92.2-0.11.71.21.31.41.40.50.81.4-1.4-0.20.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value16718520119615215918317312719512914157103125117778915010854515586502810
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.099.9100.1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.84.14.14.23.93.94.24.13.55.23.33.61.80.00.00.00.00.00.00.00.00.00.00.01.91.20.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value916968656466656666656565646363636462595252525152525252525353525150
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value171818-16172321202020202019191818
Percentage of DepreciationDepletionAndAmortization19.327.026.4-25.126.635.432.730.830.531.131.231.731.030.129.328.9

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cdw:CorporateSegmentPrivateSectorBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value222221-21211920202120202020412020
Percentage of DepreciationDepletionAndAmortization24.431.831.8-33.233.429.730.930.831.731.431.731.832.464.932.832.5

us-gaap:OperatingSegments, cdw:PublicSegmentGovernmentAgenciesEducationandHealthcare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value371415-13121111111111111111111111
Percentage of DepreciationDepletionAndAmortization41.221.422.0-21.119.817.017.517.016.817.017.017.117.417.617.717.4

us-gaap:OperatingSegments, cdw:SmallBusiness



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value555-5555555555555
Percentage of DepreciationDepletionAndAmortization6.38.28.2-8.68.77.87.97.87.88.17.97.87.98.08.18.2

us-gaap:OperatingSegments, us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value887-7767988877778
Percentage of DepreciationDepletionAndAmortization8.811.611.6-12.011.510.011.113.613.212.512.211.611.211.812.013.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value661-4663134-25-959572-993217403-343068-23-447919-85-25616432515
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value-25-181-31-30-88-32-19-17-15-22-21-17-19-22-17-14-11-46-284-12-10-108-14-11-30-8-8-16
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.6-4.0-0.6-0.7-2.2-0.8-0.5-0.4-0.4-0.6-0.6-0.4-0.60.00.00.00.00.00.00.00.00.00.00.0-1.1-0.4-0.4-0.8

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value251613124193219171522211719221514114621121020
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value-130-181-263-225-80-319-97-207-131-271-20-164-36266-17813-2063-146-20-6211-292-97-89-278-88
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-3.0-4.0-5.4-4.9-2.0-7.8-2.2-4.9-3.6-7.2-0.5-4.2-11.10.00.00.00.00.00.00.00.00.00.00.0-3.7-3.7-12.0-4.2

Proceeds From Issuance Of Long Term Debt

Repayments Of Long Term Debt

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value1401631611551772895667109017418417512131105118481019100000000
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.00.0

Repayments Of Long Term Debt

Debt Instrument Interest Rate Stated Percentage

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value0.207-0.00400000000000000360.2270.2470.202-0.00200000000000000180.2290.2470.234-0.103000000000000010.3750.2790.217-0.00100000000000000090.3650.3730.372-0.00200000000000000180.387-0.00400000000000000360.3790.3690.370.5460.3620.3640.3980.3840.2790.3230.347
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period

Share Based Compensation

Deferred Tax Liabilities

Unrecognized Tax Benefits

Deferred Tax Assets Valuation Allowance

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value129131841171320
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.00.0

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value214154166194290205255100221144263
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:NetChangeInAccountsPayableInventoryFinancing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value-8116-53-33702220-13524-424350-135104-32137-6673-1883-4232-1161-63-7454
Percentage of NetChangeInAccountsPayableInventoryFinancing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:RevenuenetbyProductandServicePercentage



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.00.01.01.01.00.01.01.01.00.01.01.01.0
Percentage of RevenuenetbyProductandServicePercentage100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:ProductOrService

cdw:Desktops



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0880.00100000000000000090.0910.0930.0770.00.0780.0820.084-0.00300000000000000270.0780.0790.081
Percentage of RevenuenetbyProductandServicePercentage8.80.09.19.37.70.07.88.28.40.07.87.98.1

cdw:EnterpriseAndDataStorageIncludingDrives



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0550.00100000000000000090.0580.0590.0730.00100000000000000090.0670.0630.071-0.00200000000000000180.0710.0750.072
Percentage of RevenuenetbyProductandServicePercentage5.50.05.85.97.30.06.76.37.10.07.17.57.2

cdw:NetcommProducts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.1040.00.1160.1220.1290.00300000000000000270.1330.1190.134-0.00500000000000000440.1380.1390.141
Percentage of RevenuenetbyProductandServicePercentage10.40.011.612.212.90.013.311.913.40.013.813.914.1

cdw:NotebooksMobileDevices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.253-0.00500000000000000440.270.2660.2470.00.2550.2550.238-0.0049999999999999770.2450.2350.226
Percentage of RevenuenetbyProductandServicePercentage25.30.027.026.624.70.025.525.523.80.024.523.522.6

cdw:OtherHardware



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.2150.00200000000000000180.1930.1890.198-0.00699999999999997850.2080.2110.208-0.00400000000000000360.2080.20.219
Percentage of RevenuenetbyProductandServicePercentage21.50.019.318.919.80.020.821.120.80.020.820.021.9

cdw:OtherProductsAndServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.008-0.0010.0070.0070.0070.00.0060.0070.008-0.0010.0080.0070.008
Percentage of RevenuenetbyProductandServicePercentage0.80.00.70.70.70.00.60.70.80.00.80.70.8

cdw:Services



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0530.00100000000000000090.050.0480.050.0009999999999999940.0410.040.045-0.00100000000000000090.040.0390.043
Percentage of RevenuenetbyProductandServicePercentage5.30.05.04.85.00.04.14.04.50.04.03.94.3

cdw:SoftwareProducts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.1520.00200000000000000180.1430.1410.150.00300000000000000270.1390.1450.140.024000000000000020.1380.1520.138
Percentage of RevenuenetbyProductandServicePercentage15.20.014.314.115.00.013.914.514.00.013.815.213.8

cdw:TotalHardware



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.787-0.00200000000000000180.80.8040.793-0.00400000000000000360.8140.8080.807-0.022000000000000020.8140.8020.811
Percentage of RevenuenetbyProductandServicePercentage78.70.080.080.479.30.081.480.880.70.081.480.281.1

cdw:Video



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.072-0.00100000000000000090.0720.0750.069-0.00100000000000000090.0730.0780.072-0.00300000000000000270.0740.0740.072
Percentage of RevenuenetbyProductandServicePercentage7.20.07.27.56.90.07.37.87.20.07.47.47.2

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value210901161808
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.00.0100.0100.0100.00.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2109011141808
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.00.0100.0211.8100.00.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value810121112109978810109886967443431
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value810121112109978810109886967443431
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdvertisingExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value4549515339484848374546463544414234394138293737342833313036312928292928
Percentage of AdvertisingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllocatedShareBasedCompensationExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value81012121210101181010111211109811774434324021
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value000000111000000000060000
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.00.00.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value60-12-27-9684-49154
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.380.37999999999999990.2950.2950.2950.2950.210.210.210.210.160.160.160.160.10750.10750.10750.10750.06750.06750.06750.06750.042542500.00.04250.04250.00.00.0
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-1231943974276-37-17458239-27-14445
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAmortizationAndAccretionNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value91696865646665666665656564636363646259525252515252525251
Percentage of DepreciationAmortizationAndAccretionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value54544242434331313232242525251717181811111111777
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-200000.0-300000.0-200000.0-200000.0-200000.0-300000.0-200000.0-200000.0-100000.0-100000.0-200000.0-200000.0-200000.0-100000.0-100000.0-100000.0-200000.00.00.00.00.00.00.00.00.0
Percentage of DividendsCommonStock-0.4-0.6-0.5-0.5-0.5-0.7-0.6-0.6-0.3-0.3-0.8-0.8-0.8-0.4-0.6-0.6-1.10.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value54544243434431323232242525251717181811111111777
Percentage of DividendsCommonStock100.4100.6100.5100.5100.5100.7100.6100.6100.3100.3100.8100.8100.8100.4100.6100.6101.1100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-74-1-2001-51
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableTrade



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value157-69-150298116-29-86416-2991-171322-1083-7712891-12574158-7-71-3112421-8-99
Percentage of IncreaseDecreaseInAccountsPayableTrade100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value20973-58242-113039355-608-35340-184162-57312-23716420263-10591-49188-113-18-162-14
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-25411813161114131171421192224242522
Percentage of IncreaseDecreaseInDeferredIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value63-71-277731-91377-15-625810020-515653-9-3081-323-5150-6251922-9
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value103-3-227150-175995
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-37-38-42-40-38-37-36-37-37-37-37-35-39-33-37-36-38-38-383744485048505156
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value28294831443142314229412848264428442944285368278316161627
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet

us-gaap:Derivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-1000-28-1-1101014-101
Percentage of InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet100.00.00.00.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.00.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value-4235-14-89-14-3-2814413186-23-11-35-7-15-224-11-4-53-32-3-23-11-70
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-42-14-89-3-2814
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-42-14-89-3-2814
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value010-4-8
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value010-4-8
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1000-1
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value10001
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax-100.0100.0100.0100.0-100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value-4136-14-113-22-3-2617514176-23-11-35-7-15-224-11-4-53-32-3-23-11
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value131832235000-2200000011
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value545442424343313132322424252517171818111111117777000
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-09-302013-12-312013-09-30
Value21090116180870231800000
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.00.0100.0100.0100.00.0100.0100.00.0100.0100.00.00.00.00.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312015-12-312014-12-31
Value02006680000000
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.0100.00.0100.0100.00.00.00.00.00.00.00.0

us-gaap:ProceedsFromLinesOfCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-03-312012-03-312011-03-31
Value78158596980288-2200318170281121123446226426320910500000148307
Percentage of ProceedsFromLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value602101127-120000000000000
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:ProvisionForDoubtfulAccounts



Period End2020-03-312019-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302014-12-312014-09-302013-12-312013-09-302013-03-312012-03-312011-03-31
Value2900-2200000000000
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.00.00.00.0100.00.00.00.00.00.0100.00.0

us-gaap:RepaymentsOfLinesOfCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-03-312012-03-312011-03-31
Value61956010198021242073041704731073766226426320910500000148318
Percentage of RepaymentsOfLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value400000.0300000.0300000.0200000.0500000.0100000.00.0400000.0300000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value33343333222222221222121
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value33343333222222221222121
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value778613441273134122100000000
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value778613441273134122100000000
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312015-09-30
Value11111300112
Percentage of StockRepurchasedAndRetiredDuringPeriodShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value140163161155177289566710901741841751213210511848101
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.00.0100000.00.00.00.0100000.00.00.00.0100000.00.00.00.0
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.00.00.10.00.00.00.10.00.00.00.10.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value140163161155177289566710901741831751213210511848101
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.099.9100.0100.0100.0100.0100.0100.00.0100.099.9100.0100.0100.099.9100.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value222222223321111122201000
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

cdw:AccountsPayableInventoryFinancing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value34542941146550042940738752349854149644558047750937243935437328933229931125025622528225224923425320427828
Percentage of AccountsPayableInventoryFinancing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:LongtermDebtCurrentMaturitiesGross



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value3334252525-253238252541181818-18-26-26-27-27-15
Percentage of LongtermDebtCurrentMaturitiesGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:LongtermDebtExcludingCurrentMaturitiesNetofDeferredFinancingCostsDiscountorPremium



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value34383283325932533257318331873201320932103388327732623215322232143225323232403150
Percentage of LongtermDebtExcludingCurrentMaturitiesNetofDeferredFinancingCostsDiscountorPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:InventoryFinancingAgreements

cdw:OtherInventoryFinancingAgreements

cdw:AccountsPayableInventoryFinancing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value415029142523127421737211722911181210020100120038
Percentage of OtherInventoryFinancingAgreements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:InventoryFinancingAgreements

cdw:RevolvingLoanFinancingAgreement

cdw:AccountsPayableInventoryFinancing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value303379382451475406394380481480503474427558468498354427353372289330298310250256223280252248240
Percentage of RevolvingLoanFinancingAgreement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableTradeCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value1967183519002055174515771609169312881317122413911064107299710789588661012853695704777809683662672771642518691688520517563537
Percentage of AccountsPayableTradeCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedAdvertisingCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value15814715814012511913296908912289745568595052543735344133353334232733303331383327
Percentage of AccruedAdvertisingCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdditionalPaidInCapitalCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value311430953073304730252996297029532928291129032890287428572843283128172806279327292718271127042698269126882685221122102209220221962191218621792166
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value3579877876666855556765555555555555555
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtType

us-gaap:AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries

cdw:CDWUKTermLoan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value204154134138124128117133139987593135131
Percentage of AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cdw:SeniorSecuredTermLoanFacility



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value190018001700160015001500
Percentage of AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries931.41168.81268.71159.41209.71171.9

us-gaap:ContractWithCustomerLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value258252212201192178188170194159
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value257252212200192178188169193158143
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-312012-12-31
Value3491333733033294330032263238325932553255345133183303326732563238325032593268319232513766
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtType

cdw:CDWUKRevolvingCreditFacility



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value0000005130016000000
Percentage of DebtInstrumentCarryingAmount0.00.00.00.00.00.00.20.40.00.00.50.00.00.00.00.00.0

cdw:CDWUKTermLoan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-08-012016-06-302016-03-31
Value576156646665665656757572706972567483
Percentage of DebtInstrumentCarryingAmount1.61.81.72.02.02.02.11.71.72.32.22.22.12.12.20.02.32.6

cdw:OtherlongtermobligationsDomain



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1212488881212121215151515
Percentage of DebtInstrumentCarryingAmount0.40.40.10.30.30.30.30.40.40.40.40.50.50.50.5

cdw:SeniorNotesdue2028



Period End2020-03-312019-12-312019-09-302019-09-262018-12-31
Value6006006006000
Percentage of DebtInstrumentCarryingAmount17.218.018.20.00.0

cdw:SeniorSecuredAssetBasedRevolvingCreditFacility



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value212512676760
Percentage of DebtInstrumentCarryingAmount6.11.50.82.32.30.0

cdw:SeniorSecuredTermLoanFacility



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value1434143814421445144914531468
Percentage of DebtInstrumentCarryingAmount41.143.143.643.943.945.045.1

cdw:TermLoan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-08-172016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1491149914981510151515181456150015001468147114751479148314861490149014941498150215051509151315171521152515281532134612991339133913391540
Percentage of DebtInstrumentCarryingAmount42.744.945.445.845.947.145.046.046.145.142.644.544.845.445.70.046.046.046.046.00.00.047.40.00.00.047.00.00.00.035.60.00.00.0

cdw:UnsecuredSeniorNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value1775177517751700170017001700
Percentage of DebtInstrumentCarryingAmount50.853.253.751.651.552.752.2

us-gaap:RevolvingCreditFacility



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value2125126767600000176543800000000000000000000
Percentage of DebtInstrumentCarryingAmount6.11.50.82.32.30.00.00.00.00.05.11.61.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

cdw:SeniorNotesFourPointOneTwoFiveDue2025, us-gaap:SubsequentEvent



Period End2020-04-21
Value600
Percentage of DebtInstrumentCarryingAmount0.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DebtInstrumentFairValue

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312012-06-30
Value34293447341233753358314532753263329033663583341733603334337633093338333033163206328232081315
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value1920191617171819192021212233332425-262826
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilitiesNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6262111123132141158172188196
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1012812225
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNotionalAmount

us-gaap:InterestRateCap



Period End2020-03-312019-12-312019-09-30
Value280012001200
Percentage of DerivativeNotionalAmount100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value2012121911611781861621381401291381501711671641351261201171081021301039791112939386998487761068791
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtType

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

cdw:CDWUKRevolvingCreditFacility



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value5050505050505066
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtType

us-gaap:LongtermDebtWeightedAverageInterestRate

cdw:CDWUKRevolvingCreditFacility



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value0.00.00.00.00.00.00.00.0170.00.00.00.00.00.0
Percentage of LongtermDebtWeightedAverageInterestRate0.00.00.00.00.00.00.0100.00.00.00.00.00.00.0

cdw:CDWUKTermLoan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value0.02070.02190.02160.0220.0230.0230.0230.01940.01980.0190.01690.01690.0177
Percentage of LongtermDebtWeightedAverageInterestRate0.00.00.00.00.00.00.00.00.00.099.40.00.0

cdw:SeniorNotesdue2028



Period End2020-03-312019-12-312019-09-302019-09-262018-12-31
Value0.04250.04250.04250.04250.0
Percentage of LongtermDebtWeightedAverageInterestRate0.00.00.00.00.0

cdw:SeniorSecuredAssetBasedRevolvingCreditFacility



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.02620.050.03310.0370.0380.0
Percentage of LongtermDebtWeightedAverageInterestRate0.00.00.00.00.00.0

cdw:SeniorSecuredTermLoanFacility



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value0.02740.03550.0380.0420.0430.0410.037
Percentage of LongtermDebtWeightedAverageInterestRate0.00.00.00.00.00.00.0

us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

cdw:SeniorNotesFourPointOneTwoFiveDue2025, us-gaap:SubsequentEvent



Period End2020-04-21
Value0.04125
Percentage of LongtermDebtWeightedAverageInterestRate0.0

us-gaap:OperatingLeaseLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1291318186930
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.00.0

us-gaap:OtherReceivablesNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value442395432406353316370373310336380337239234269260212198230188174155175159164146197165151148171160156143186192
Percentage of OtherReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStockSharesAuthorized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1001001001001001001001001001001001001001001001001001001001001001001001001001001001000
Percentage of PreferredStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:RestrictedCash



Period End2020-03-312019-12-312019-03-312018-12-312018-03-312017-12-31
Value005000
Percentage of RestrictedCash0.00.0100.00.00.00.0

us-gaap:RevenueRemainingPerformanceObligation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value424340403937383339
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept

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


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerSalesChannel


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimingOfTransferOfGoodOrService


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


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments