CWK


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockParOrStatedValuePerShare
us-gaap:StatementEquityComponents
us-gaap:SharesOutstanding

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareBasicAndDiluted

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

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization

us-gaap:CostsAndExpenses

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:OperatingIncomeLoss

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

us-gaap:InterestPaidNet

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:OtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

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

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:DebtCurrent

us-gaap:LongTermDebtCurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent

us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:MinorityInterest

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:StockholdersEquity
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:MinorityInterest

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:DepreciationDepletionAndAmortization

us-gaap:ShareBasedCompensation

us-gaap:AmortizationOfFinancingCosts

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquireInvestments

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:RepaymentsOfLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

cwk:AccountsReceivableSecuritizationProgramCosts
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
cwk:ChangeinAdjustedEBIDTA

cwk:ChangeinRevenueAmount
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

cwk:EarningsBeforeInterestTaxesDepreciationAndAmortizationOtherAdjustments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
cwk:IncomeLossFromContinuingOperationsBeforeInterestTaxesDepreciationAndAmortization

cwk:IncreaseDecreaseInBeneficialInterestInSecuritizationNoncash

cwk:OperatingLeaseRightofUseAssetAmortization

cwk:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentExcludingRedemptionsOrPurchaseOfInterestsNetOfTax
us-gaap:StatementEquityComponents

cwk:ProceedsFromAccountsReceivableSecuritizationReceivedFromTradeAccountsReceivableSoldToThirdParty

us-gaap:AssetImpairmentCharges

us-gaap:BusinessCombinationAcquisitionRelatedCosts

us-gaap:BusinessCombinationIntegrationRelatedCosts

us-gaap:CapitalLeaseObligationsIncurred

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
us-gaap:DebtInstrument, us-gaap:VariableRate
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
us-gaap:StatementScenario, us-gaap:DebtInstrument, us-gaap:VariableRate

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements

us-gaap:FinanceLeasePrincipalPayments

us-gaap:ForeignCurrencyTransactionGainLossUnrealized
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:GoodwillAcquiredDuringPeriod
us-gaap:StatementBusinessSegments

us-gaap:GoodwillForeignCurrencyTranslationGainLoss
us-gaap:StatementBusinessSegments

us-gaap:GoodwillPurchaseAccountingAdjustments
us-gaap:StatementBusinessSegments

us-gaap:GoodwillWrittenOffRelatedToSaleOfBusinessUnit
us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxesPaid

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:LiabilitiesAssumed1

us-gaap:NoncontrollingInterestIncreaseFromBusinessCombination
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:HedgingDesignation
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForRestructuring
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireOtherInvestments

us-gaap:ProceedsFromAccountsReceivableSecuritization
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ProceedsFromIssuanceOfDebt

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAociCurrentPeriodTax

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

us-gaap:RestructuringSettlementAndImpairmentProvisions
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:StatementEquityComponents
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation
us-gaap:StatementEquityComponents

cwk:TransferorsInterestsInTransferredFinancialAssetsAmountDrawnOnInvestmentLimit

us-gaap:AccountsAndOtherReceivablesNetCurrent

us-gaap:AccountsReceivableFromSecuritization
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:AccountsReceivableRelatedPartiesCurrent
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:AccountsReceivableRelatedPartiesNoncurrent

us-gaap:AccruedIncomeTaxesNoncurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:BusinessCombinationContingentConsiderationLiability
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:BalanceSheetLocation
us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerLiability

us-gaap:DebtInstrumentCarryingAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DeferredCompensationPlanAssets
us-gaap:FairValueByMeasurementFrequency
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsGross

us-gaap:DeferredIncomeTaxAssetsNet
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeAssets
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeLiabilities
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeNumberOfInstrumentsHeld

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:EquityMethodInvestments
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:GuaranteeObligationsMaximumExposure

us-gaap:IncomeTaxesReceivable

us-gaap:IntangibleAssetsGrossExcludingGoodwill
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:InterestsContinuedToBeHeldByTransferorFairValue
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType

us-gaap:LongTermDebtFairValue
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:LossContingencyAccrualAtCarryingValue

us-gaap:LossContingencyAccrualCarryingValueCurrent

us-gaap:LossContingencyAccrualCarryingValueNoncurrent
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:LossContingencyReceivable

us-gaap:PrepaidExpenseCurrent

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue
us-gaap:BalanceSheetLocation

us-gaap:RestructuringReserve
us-gaap:RestructuringCostAndReserve

us-gaap:RestructuringReserveCurrent

us-gaap:RestructuringReserveNoncurrent
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

Tables

  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:CommonStockValue ████████▇▁22.222.122.122.021.921.721.721.720.914.6NA1451.3NANANA
us-gaap:CommonStockParOrStatedValuePerShare NA1.0000000000000001e-071.0000000000000001e-071.0000000000000001e-071.0000000000000001e-071.0000000000000001e-071.0000000000000001e-071.0000000000000001e-071.0000000000000001e-071.0000000000000001e-07NA1e-05NANANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock████████▇▁▁▁▁▁221.8220.8220.5219.5219.0217.0216.7216.6208.7145.8145.6145.1144.4143.7NA
us-gaap:CommonStockSharesIssued ████████▇▁221.8220.8220.5219.5219.0217.0216.7216.6208.7145.8NA145.1NANANA
us-gaap:CommonStockSharesOutstanding ████████▇▁221.8220.8220.5219.5219.0217.0216.7216.6208.7145.8NA145.1NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁221.1220.4NANA224.5224.8NANA184.0145.7NANANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▄▁221.1220.4219.9NA218.0216.9216.6NA184.0145.7NANANANANA
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted NANA219.9NANANA216.6NA184.0145.7145.3NA144.1143.7NA
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount ▁▁█0.60.43.9NANANA7.4NA14.018.510.9NA13.916.1NA
us-gaap:EarningsPerShareBasic ▆▄▅▇▇▇▆▆▅▅▂█▃▅▁-0.17-0.46-0.250.010.050.03-0.1-0.09-0.22-0.23-0.640.15-0.55-0.33-0.82
us-gaap:EarningsPerShareDiluted █▁-0.17-0.46NA0.010.050.03-0.1-0.09-0.22-0.23-0.640.14-0.55-0.33-0.82
us-gaap:EarningsPerShareBasicAndDiluted NANA-0.25NANANA-0.10.0-0.26-0.22-0.640.16999999999999993-0.55-0.33NA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▄▃▄█▅▅▄▇▅▄▃▅▃▂▁1931.61743.61895.42607.52118.82121.71903.02401.92076.01974.31767.72052.71709.31700.61461.3
us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization ▃▁▃█▄▄▂1599.61453.91598.82037.61692.21687.11564.8NANANANANANANANA
us-gaap:CostsAndExpenses ▃▂▃█▄▄▃▇▄▃▂▄▁▁1931.91806.41980.92484.42081.82068.51929.02352.12065.01941.81849.62012.91763.91736.7NA
us-gaap:SellingGeneralAndAdministrativeExpense ▁▂▃█▅▄▃█▄▅▄▅▂▃254.3272.1284.0364.5315.2306.9286.8356.9307.4311.9295.6317.3276.0281.0NA
us-gaap:OperatingIncomeLoss ▄▃▂█▆▆▄▆▅▅▂▆▃▃▁-0.3-62.8-85.5123.137.053.2-26.043.211.032.5-81.937.2-54.6-36.1-118.2
us-gaap:InterestExpense ▂▁▁▁▁▁▁▁█▃▂▂▃▂44.938.836.537.837.438.237.239.792.752.044.448.249.244.0NA
us-gaap:InterestPaidNet ▁▁▃▄▄▄▄▄█▆▄▄▄19.822.031.034.838.538.937.939.159.945.639.439.638.2NANA
us-gaap:OtherNonoperatingIncomeExpense ▂▁█▂▂▃▂▂▂▃▂▄▂▂0.5-8.639.10.30.42.20.60.8-0.32.01.09.80.90.2NA
us-gaap:AllocatedShareBasedCompensationExpense ▁▁▁▂▂▂▂█▂▂▁▁▁▁4.55.96.310.311.410.611.637.710.88.86.86.66.26.2NA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▄▂▂█▅▆▃▆▂▅▁▅▂▂-41.9-108.5-81.686.20.717.7-61.811.6-81.6-17.1-124.91.8-102.4-79.8NA
us-gaap:IncomeTaxExpenseBenefit ▃▃▂█▃▄▁▅▁▄▂▂▂▁-4.6-7.7-26.583.1-11.011.4-40.924.5-32.915.1-32.0-22.5-23.8-32.5NA
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ██▁█▃▅▆▄▄▃▆▅▆▆41.245.1-66.737.9-34.4-5.87.3-24.3-12.4-35.710.10.813.219.1NA
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax ▇▆▁█▅▃▅▅▇▇10.0-9.7-89.318.7-27.7-55.9-27.4-31.94.67.7NA14.51.8-11.8NA
us-gaap:NetIncomeLoss ▅▁▄▇▇▇▅▆▄▅▁█▂▄-37.3-100.8-55.13.111.76.3-20.9-18.0-48.7-32.2-92.924.3-78.6-47.3NA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:Parent█▁▆-37.3-100.8-55.1NANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▅▁▄▇▇▇▅▆▄▅▁█▂-37.3-100.8-55.13.111.76.3-20.9-12.9-41.4-33.5-92.924.3-78.6NANA
us-gaap:ComprehensiveIncomeNetOfTax ▇▅▁█▅▅▅▅▅▅▅█▅▅13.8-65.4-209.158.4-50.2-55.3-41.1-68.5-56.4-59.9-69.144.0-63.5-39.2NA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:Assets ██▅█▅▆▆▅▄▁7128.47076.26619.47163.46654.46758.96707.56546.06432.45846.7NA5797.9NANANA
us-gaap:Liabilities ██▄▇▄▄▃▂▁▄6081.56046.45535.05862.15420.25470.95377.15185.95023.35406.1NA5294.0NANANA
us-gaap:LiabilitiesAndStockholdersEquity ██▅█▅▆▆▅▄▁7128.47076.26619.47163.46654.46758.96707.56546.06432.45846.7NA5797.9NANANA
us-gaap:StockholdersEquity ▅▅▆▇▇▇▇██▁▁▂▁▁1046.11029.41084.21301.31234.21288.01330.41360.11409.1440.6480.5503.9430.9479.6NA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AssetsCurrent ▇▆▂█▃▃▁▇▆▁2709.62630.82218.52860.82289.82264.12132.12743.32623.82079.4NA1910.5NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▇▃▇▃▃▃██▃▃▃▁▂916.8875.5379.5813.2400.1423.7411.0895.3939.0382.4438.7405.6207.2327.7NA
us-gaap:OtherAssetsCurrent █▁449.2425.4NA413.7NANANANANANANANANANANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent NANA559.0484.4494.0438.5312.2343.4373.9339.7NA176.3NANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AmortizationOfIntangibleAssets ▁▆▅▆███▆▇▇▇▇▆▆36.745.442.544.747.348.047.344.946.246.746.546.245.345.2NA
us-gaap:PropertyPlantAndEquipmentNet ▁▂▄▇▅▇▇█▆▆243.3255.7274.0299.4288.2299.6306.9313.8295.6289.5NA304.3NANANA
us-gaap:Goodwill █▇▇▆▅▆▅▂▁▁2059.52035.12009.61969.11930.71950.31946.91778.51771.01750.2NA1765.3NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▁▂▃▃▄▆█▆▇█991.81023.81062.71062.61093.61146.51193.11128.21166.51203.9NA1306.0NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelationships▁▂▃▃▄▆█▅▇█437.1468.5506.5505.6538.5590.5636.6562.6606.7643.2NA743.5NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:OtherIntangibleAssets▁▁▂▂▁▂▂█▄▅8.79.310.211.09.110.010.519.613.814.7NA16.5NANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▂▅█444.8450.6470.8490.7NANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▇▇▂▁▅▇█▇█▅486.6492.1399.0386.3460.4479.1502.9489.5500.0447.8NA432.8NANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:LiabilitiesCurrent ▂▁▃█▂▂▁▄▂▁1947.41863.01983.92322.61944.21945.61862.02038.71900.91869.4NA1965.6NANANA
us-gaap:DebtCurrent ▁▃▄▅▇▇▄▆█▇37.438.138.839.340.340.138.739.940.640.3NA59.5NANANA
us-gaap:LongTermDebtCurrent ▁▂▆█36.036.237.337.8NANANA37.036.135.5NA53.6NANANA
us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent ▆▆▆█▅▅▅▆▁▁1023.51024.91037.61145.3957.6998.9982.21047.7748.4746.2NA771.2NANANA
us-gaap:AccruedIncomeTaxesCurrent ▃▄▄▅█▇▅▄▁▁35.340.144.159.693.987.760.143.28.913.0NA35.7NANANA
us-gaap:OperatingLeaseLiabilityCurrent ▁▁▃█112.1111.7114.1118.6NANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ▂▁▂▆▆▆▆▁██112.092.9111.4189.6185.7197.5201.090.0228.1235.7NA234.4NANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:LongTermDebt NANA2611.12620.32662.22668.32674.22681.2NANANANANANANA
us-gaap:LongTermDebtNoncurrent ▁█3239.53243.0NA2620.3NANANA2644.22646.53002.2NA2784.0NANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▃▄▄▆▁▃▄█▆█47.065.574.1110.013.956.077.3136.4107.9145.0NA157.5NANANA
us-gaap:MinorityInterest █▄▃▁0.80.40.20.0NANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▇██▄▅▃▁▅▅▆402.8421.5422.6352.1368.3346.4305.8366.6368.0389.5NA386.9NANANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▁▂▆█415.4424.2443.3457.1NANANANANANANANANANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:StockholdersEquity ▅▅▆▇▇▇▇██▁▁▂▁▁1046.11029.41084.21301.31234.21288.01330.41360.11409.1440.6480.5503.9430.9479.6NA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▁▁▂█1046.91029.81084.41301.3NANANANANANANANANANANA
us-gaap:CommonStockValue ████████▇▁22.222.122.122.021.921.721.721.720.914.6NA1451.3NANANA
us-gaap:AdditionalPaidInCapital █████████▁2835.12832.72822.12819.52810.92814.32801.42791.22789.21770.6NA305.0NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▂▅▇▇▆▆▇▇█-1500.9-1463.6-1362.8-1297.0-1300.1-1311.8-1318.1-1298.4-1302.2-1253.5NA-1165.2NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▃▂▁▅▃▅▆▇██-310.3-361.4-396.8-242.8-298.1-236.2-174.6-154.4-98.8-91.1NA-87.2NANANA
us-gaap:TreasuryStockValue NA0.40.40.40.4NANA0.0NANANANANANANA
us-gaap:MinorityInterest █▄▃▁0.80.40.20.0NANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▁█▅9.812.811.7NA16.212.911.423.614.516.511.920.89.3NANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▃▁█▄▄▁▄▅▄▂▇▄77.4-50.0-249.9369.957.756.6-214.937.9139.3-8.8-170.6246.9-3.4NANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▅▄█▇▆▁▆▄▇▇▆▅-13.1-92.3-131.444.5-19.2-24.3-275.9-42.7-138.4-16.7-20.2-50.2-110.7NANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁█▁▁▁▁▁▁▇▁▄▁▁-20.7626.1-23.9-18.7-39.0-19.9-12.0-18.3563.1-39.9221.0-0.3-5.9NANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect 43.6NANANA-0.5NANANANANANANANANANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▃▁█▄▄▁▄▅▄▂▇▄77.4-50.0-249.9369.957.756.6-214.937.9139.3-8.8-170.6246.9-3.4NANA
us-gaap:NetIncomeLoss ▅▁▄▇▇▇▅▆▄▅▁█▂▄-37.3-100.8-55.13.111.76.3-20.9-18.0-48.7-32.2-92.924.3-78.6-47.3NA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:Parent█▁▆-37.3-100.8-55.1NANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▅▁▄▇▇▇▅▆▄▅▁█▂-37.3-100.8-55.13.111.76.3-20.9-12.9-41.4-33.5-92.924.3-78.6NANA
us-gaap:DepreciationDepletionAndAmortization ▁▆▅▆▇▆▆█▅▅▄█▁▂64.974.672.073.975.074.373.577.071.671.669.877.664.165.9NA
us-gaap:ShareBasedCompensation ▁▂▂▃▃▃▃█▆▂▂▃▂9.512.911.915.116.215.514.532.224.112.513.115.011.7NANA
us-gaap:AmortizationOfFinancingCosts ▃▂▅▁▁▂▁▃▄▇▅█▇2.41.83.20.91.21.31.02.12.64.43.45.34.4NANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▅▄█▇▆▁▆▄▇▇▆▅-13.1-92.3-131.444.5-19.2-24.3-275.9-42.7-138.4-16.7-20.2-50.2-110.7NANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▁▁▁█▃▃▃▅▇▂▄█▆9.18.09.832.917.116.613.722.730.210.720.633.726.9NANA
us-gaap:PaymentsToAcquireInvestments NANA11.3NA2.21.70.01.51.1NANA0.00.0NANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁█▁▁▁▁▁▁▇▁▄▁▁-20.7626.1-23.9-18.7-39.0-19.9-12.0-18.3563.1-39.9221.0-0.3-5.9NANA
us-gaap:RepaymentsOfLongTermDebt ▁▁▁▁▁▁▁▁█▁▁▁▁6.66.70.06.76.66.96.87.13072.127.426.617.737.1NANA
  2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType cwk:SeniorSecuredNoteDueMay2028,cwk:SeniorSecuredNoteNANANANANANANANANANANANANANANA

None

us-gaap:CommonStockValue

us-gaap:CommonStockValue


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value222222222121212120141451
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.30.30.30.30.30.30.225.0

None

us-gaap:CommonStockParOrStatedValuePerShare

us-gaap:CommonStockParOrStatedValuePerShare


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-07-122018-06-302017-12-31
Value0.10.10.10.10.10.10.10.10.010.110.0
Percentage of CommonStockParOrStatedValuePerShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:SharesOutstanding us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value221220220219219217216216208145145145144143143139
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value221220220219219217216216208145145
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value221220220219219217216216208145145
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


None
Period End2020-09-302020-06-302019-09-302019-06-302018-09-302018-06-30
Value221220224224184145
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0

None

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value221220219218216216184145
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted


None
Period End2020-03-312019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value219216184145145144143
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


None
Period End2020-09-302020-06-302020-03-312019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value0.60.43.97.41418101316
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-0.17-0.46-0.250.010.050.03-0.1-0.09-0.22-0.23-0.640.15-0.55-0.33-0.82
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


None
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-0.17-0.460.010.050.03-0.1-0.09-0.22-0.23-0.640.14-0.55-0.33-0.82
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


None
Period End2020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-0.25-0.10-0.26-0.22-0.640.17-0.55-0.33
Percentage of EarningsPerShareBasicAndDiluted100.0100.00.0100.0100.0100.0100.0100.0100.0

None

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value193117431895260721182121190324012076197417672052170917001461
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OperatingSegments, cwk:AmericasSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value14161248139418181512149213471670147513721206134611371128
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax73.371.673.669.871.470.470.869.671.169.568.265.666.566.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax73.371.673.669.871.470.470.869.671.169.568.265.666.566.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cwk:AmericasSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cwk:AsiaPacificSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value292290290417370399352382373387352388372372
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.116.615.316.017.518.818.515.918.019.619.918.921.821.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.116.615.316.017.518.818.515.918.019.619.918.921.821.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cwk:AsiaPacificSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cwk:EuropeTheMiddleEastAndAfricaSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value223205210371235228202348226214209316199199
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.611.811.114.211.110.810.614.510.910.911.815.411.711.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.611.811.114.211.110.810.614.510.910.911.815.411.711.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments cwk:EuropeTheMiddleEastAndAfricaSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

cwk:CapitalMarketsService, cwk:AmericasSegment, us-gaap:TransferredAtPointInTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value12475147252182170141209177151163
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.44.47.89.78.68.17.48.78.67.79.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.44.47.89.78.68.17.48.78.67.79.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:CapitalMarketsService cwk:AmericasSegment us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:CapitalMarketsService, cwk:AsiaPacificSegment, us-gaap:TransferredAtPointInTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value7.713143214332327161527
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.80.71.30.71.61.31.10.80.81.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.80.71.30.71.61.31.10.80.81.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:CapitalMarketsService cwk:AsiaPacificSegment us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:CapitalMarketsService, cwk:EuropeTheMiddleEastAndAfricaSegment, us-gaap:TransferredAtPointInTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2424218041332675403423
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.41.13.12.01.61.43.11.91.81.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.21.41.13.12.01.61.43.11.91.81.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:CapitalMarketsService cwk:EuropeTheMiddleEastAndAfricaSegment us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:LeasingService, cwk:AmericasSegment, us-gaap:TransferredAtPointInTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value245193242454375389300452413374247
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.711.112.817.417.718.315.818.919.919.014.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.711.112.817.417.718.315.818.919.919.014.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:LeasingService cwk:AmericasSegment us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:LeasingService, cwk:AsiaPacificSegment, us-gaap:TransferredAtPointInTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3332226542452663414326
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.81.91.22.52.02.21.42.72.02.21.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.81.91.22.52.02.21.42.72.02.21.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:LeasingService cwk:AsiaPacificSegment us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:LeasingService, cwk:EuropeTheMiddleEastAndAfricaSegment, us-gaap:TransferredAtPointInTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4441408956574891675948
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.42.23.42.62.72.63.83.33.02.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.42.23.42.62.72.63.83.33.02.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:LeasingService cwk:EuropeTheMiddleEastAndAfricaSegment us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:PropertyFacilitiesAndProjectManagement, cwk:AmericasSegment, us-gaap:TransferredOverTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value10079459661055906892869957849804758
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax52.254.251.040.542.842.145.739.940.940.742.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax52.254.251.040.542.842.145.739.940.940.742.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:PropertyFacilitiesAndProjectManagement cwk:AmericasSegment us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:PropertyFacilitiesAndProjectManagement, cwk:AsiaPacificSegment, us-gaap:TransferredOverTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value222214228289283292275267292301275
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.512.312.011.113.413.814.511.114.115.315.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.512.312.011.113.413.814.511.114.115.315.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:PropertyFacilitiesAndProjectManagement cwk:AsiaPacificSegment us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:PropertyFacilitiesAndProjectManagement, cwk:EuropeTheMiddleEastAndAfricaSegment, us-gaap:TransferredOverTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value117102106132969587118757799
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.15.95.65.14.64.54.64.93.63.95.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.15.95.65.14.64.54.64.93.63.95.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:PropertyFacilitiesAndProjectManagement cwk:EuropeTheMiddleEastAndAfricaSegment us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:ValuationAndOtherService, cwk:AmericasSegment, cwk:TransferredAtPointInTimeOrOverTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3833395748403750354237
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.01.92.12.22.31.91.92.11.72.12.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.01.92.12.22.31.91.92.11.72.12.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:ValuationAndOtherService cwk:AmericasSegment cwk:TransferredAtPointInTimeOrOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:ValuationAndOtherService, cwk:AsiaPacificSegment, cwk:TransferredAtPointInTimeOrOverTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2830253029282623232723
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.71.31.21.41.31.41.01.11.41.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.71.31.21.41.31.41.01.11.41.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:ValuationAndOtherService cwk:AsiaPacificSegment cwk:TransferredAtPointInTimeOrOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:ValuationAndOtherService, cwk:EuropeTheMiddleEastAndAfricaSegment, cwk:TransferredAtPointInTimeOrOverTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3837416841423963444337
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.02.12.22.61.92.02.12.72.12.22.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.02.12.22.61.92.02.12.72.12.22.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:ValuationAndOtherService cwk:EuropeTheMiddleEastAndAfricaSegment cwk:TransferredAtPointInTimeOrOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:TimingOfTransferOfGoodOrService

cwk:CapitalMarketsService, us-gaap:TransferredAtPointInTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value155113182365239237191312234201214
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.16.59.614.011.311.210.113.011.310.212.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.16.59.614.011.311.210.113.011.310.212.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:CapitalMarketsService us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:LeasingService, us-gaap:TransferredAtPointInTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value323267305609474491375608522476321
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.715.316.123.422.423.219.725.325.124.118.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.715.316.123.422.423.219.725.325.124.118.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:LeasingService us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:PropertyFacilitiesAndProjectManagement, us-gaap:TransferredOverTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value13471262130114771286128012321343121611831133
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax69.772.468.756.760.760.464.855.958.660.064.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax69.772.468.756.760.760.464.855.958.660.064.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:PropertyFacilitiesAndProjectManagement us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:ValuationAndOtherService, cwk:TransferredAtPointInTimeOrOverTime


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value10510010515511911210213810311297
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.45.85.66.05.65.35.45.75.05.75.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.45.85.66.05.65.35.45.75.05.75.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:ValuationAndOtherService cwk:TransferredAtPointInTimeOrOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

cwk:AmericasSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value14161248139418181512149213471670147513721206
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax73.371.673.669.871.470.470.869.671.169.568.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax73.371.673.669.871.470.470.869.671.169.568.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:AmericasSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:AsiaPacificSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value292290290417370399352382373387352
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.116.615.316.017.518.818.515.918.019.619.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.116.615.316.017.518.818.515.918.019.619.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:AsiaPacificSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:EuropeTheMiddleEastAndAfricaSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value223205210371235228202348226214209
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.611.811.114.211.110.810.614.510.910.911.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.611.811.114.211.110.810.614.510.910.911.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:EuropeTheMiddleEastAndAfricaSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1599145315982037169216871564
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax82.883.484.478.179.979.582.2

None

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value19311806198024842081206819292352206519411849201217631736
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0103.6104.595.398.397.5101.497.999.598.4104.698.1103.2102.1

None

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value254272284364315306286356307311295317276281
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.215.615.014.014.914.515.114.914.815.816.715.516.116.5

None

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-0.3-62.8-85.51233753-26.0431132-81.937-54.6-36.1-118.2
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-3.6-4.54.71.72.5-1.41.80.51.6-4.61.8-3.2-2.1-8.1

None

us-gaap:InterestExpense

us-gaap:InterestExpense


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4438363737383739925244484944
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.21.91.41.81.82.01.74.52.62.52.32.92.6

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

us-gaap:InterestRateContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-10.0-1.64.71.92.92.62.52.43.3
Percentage of InterestExpense-22.3-4.112.95.17.67.02.74.67.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.5-0.10.20.10.10.10.10.10.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:InterestRateContract us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.0

None

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value19223134383837395945393938
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.01.31.61.31.81.82.01.62.92.32.21.92.2

None

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.5-8.6390.30.42.20.60.8-0.32.01.09.80.90.2
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-0.52.10.00.00.10.00.0-0.00.10.10.50.10.0

None

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4.55.96.31011101137108.86.86.66.26.2
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.30.30.40.50.50.61.60.50.40.40.30.40.4

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

cwk:PerformanceBasedEmployeeStockOption


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.00.00.02.82.72.33.11.40.00.00.0
Percentage of AllocatedShareBasedCompensationExpense0.00.00.027.223.721.726.73.70.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.10.10.10.20.10.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:PerformanceBasedEmployeeStockOption0.00.00.00.00.00.00.00.00.00.00.0

cwk:RestrictedStockUnitsRSUsCoInvestment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.00.00.10.10.10.10.10.70.1-0.40.30.50.3-0.1
Percentage of AllocatedShareBasedCompensationExpense0.00.01.61.00.90.90.91.90.9-4.54.47.64.8-1.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.0-0.00.00.00.0-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:RestrictedStockUnitsRSUsCoInvestment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

cwk:RestrictedStockUnitsRSUsPerformanceBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.71.30.80.60.60.50.2150.00.00.00.00.00.0
Percentage of AllocatedShareBasedCompensationExpense15.622.012.75.85.34.71.740.80.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.00.00.00.00.00.60.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:RestrictedStockUnitsRSUsPerformanceBased0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

cwk:RestrictedStockUnitsRSUsTimeBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value8.811101011119.716148.15.12.25.45.7
Percentage of AllocatedShareBasedCompensationExpense195.6193.2171.4105.8100.0107.583.643.8134.392.075.033.387.191.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.70.60.40.50.50.50.70.70.40.30.10.30.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:RestrictedStockUnitsRSUsTimeBased0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

cwk:TimeBasedEmployeeStockOption


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.10.10.20.71.41.11.4-0.84.51.11.54.00.50.6
Percentage of AllocatedShareBasedCompensationExpense2.21.73.26.812.310.412.1-2.141.712.522.160.68.19.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.10.10.1-0.00.20.10.10.20.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax cwk:TimeBasedEmployeeStockOption0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value9.5121111121210.0-30.7999353159.27.46.27.37.1
Percentage of AllocatedShareBasedCompensationExpense211.1215.3185.7112.6106.1113.286.2-81.7140.7104.5108.893.9117.7114.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.70.60.40.60.60.5-1.30.70.50.40.30.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RestrictedStockUnitsRSU0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-41.9-108.5-81.6860.717-61.811-81.6-17.1-124.91.8-102.4-79.8
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.2-6.2-4.33.30.00.8-3.20.5-3.9-0.9-7.10.1-6.0-4.7

None

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-4.6-7.7-26.583-11.011-40.924-32.915-32.0-22.5-23.8-32.5
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.2-0.4-1.43.2-0.50.5-2.11.0-1.60.8-1.8-1.1-1.4-1.9

None

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4145-66.737-34.4-5.87.3-24.3-12.4-35.7100.81319
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.12.6-3.51.5-1.6-0.30.4-1.0-0.6-1.80.60.00.81.1

None

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value10.0-9.7-89.318-27.7-55.9-27.4-31.94.67.7141.8-11.8
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.5-0.6-4.70.7-1.3-2.6-1.4-1.30.20.40.70.1-0.7

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-37.3-100.8-55.13.1116.3-20.9-18.0-48.7-32.2-92.924-78.6-47.3
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-5.8-2.90.10.60.3-1.1-0.7-2.3-1.6-5.31.2-4.6-2.8

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:Parent


None
Period End2020-09-302020-06-302020-03-31
Value-37.3-100.8-55.1
Percentage of NetIncomeLoss100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-5.8-2.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-37.3-100.8-55.13.1116.3-20.9-12.9-41.4-33.5-92.924-78.6
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.071.785.0104.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-5.8-2.90.10.60.3-1.1-0.5-2.0-1.7-5.31.2-4.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value13-65.4-209.158-50.2-55.3-41.1-68.5-56.4-59.9-69.144-63.5-39.2
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.7-3.8-11.02.2-2.4-2.6-2.2-2.9-2.7-3.0-3.92.1-3.7-2.3

None

us-gaap:Assets

us-gaap:Assets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value71287076661971636654675867076546643258465797
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:Liabilities

us-gaap:Liabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value60816046553558625420547053775185502354065294
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets85.385.483.681.881.580.980.279.278.192.591.3

None

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value71287076661971636654675867076546643258465797
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value1046102910841301123412881330136014094404805034304795901025
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.714.516.418.218.519.119.820.821.97.50.08.70.00.00.00.0

us-gaap:StockholdersEquity us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment


None
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302018-12-31
Value-168.0-178.0-79.0-97.7-70.013
Percentage of StockholdersEquity-16.1-17.3-6.1-7.9-5.41.0
Percentage of Assets-2.4-2.5-1.1-1.5-1.00.2
Percentage of Assets us-gaap:InterestRateContract us-gaap:CashFlowHedging cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment0.00.00.00.00.00.0

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-178.0-168.3-79.0-97.7-70.0-14.113
Percentage of StockholdersEquity-17.3-15.5-6.1-7.9-5.4-1.11.0
Percentage of Assets-2.5-2.5-1.1-1.5-1.0-0.20.2
Percentage of Assets us-gaap:InterestRateContract us-gaap:CashFlowHedging us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment


None
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302018-12-31
Value-168.0-178.0-79.0-97.7-70.013
Percentage of StockholdersEquity-16.1-17.3-6.1-7.9-5.41.0
Percentage of Assets-2.4-2.5-1.1-1.5-1.00.2
Percentage of Assets cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment0.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-31
Value-177.4-167.7-78.4-97.1-69.4-13.5133319
Percentage of StockholdersEquity-17.2-15.5-6.0-7.9-5.4-1.01.07.03.9
Percentage of Assets-2.5-2.5-1.1-1.5-1.0-0.20.20.00.3
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.0

None

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value27092630221828602289226421322743262320791910
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets38.037.233.539.934.433.531.841.940.835.633.0

None

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value916875379813400423411895939382438405207327382530
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.912.45.711.46.06.36.113.714.66.50.07.00.00.00.00.0

None

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


None
Period End2020-09-302020-06-302019-12-31
Value449425413
Percentage of OtherAssetsCurrent100.0100.0100.0
Percentage of Assets6.36.05.8

None

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value559484494438312343373339176
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.46.87.46.54.75.25.85.83.0

None

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3645424447484744464646464545
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value243255274299288299306313295289304
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.43.64.14.24.34.44.64.84.65.05.2

None

us-gaap:Goodwill

us-gaap:Goodwill


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value205920352009196919301950194617781771175017651608
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.928.830.427.529.028.929.027.227.529.930.40.0

us-gaap:Goodwill us-gaap:StatementBusinessSegments

cwk:AmericasSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value149814971499141714161416140612541257125512491155
Percentage of Goodwill72.873.674.672.073.372.672.270.571.071.770.871.9
Percentage of Assets21.021.222.719.821.321.021.019.219.521.521.60.0
Percentage of Assets cwk:AmericasSegment0.00.00.00.00.00.00.00.00.00.00.00.0

cwk:AsiaPacificSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value249240213269259269272258257252266248
Percentage of Goodwill12.111.810.613.713.413.814.014.514.614.415.115.4
Percentage of Assets3.53.43.23.83.94.04.13.94.04.34.60.0
Percentage of Assets cwk:AsiaPacificSegment0.00.00.00.00.00.00.00.00.00.00.00.0

cwk:EuropeTheMiddleEastAndAfricaSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value311297296282255264267266255242249204
Percentage of Goodwill15.114.614.714.313.213.613.815.014.413.914.112.7
Percentage of Assets4.44.24.53.93.83.94.04.14.04.24.30.0
Percentage of Assets cwk:EuropeTheMiddleEastAndAfricaSegment0.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9911023106210621093114611931128116612031306
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.914.516.114.816.417.017.817.218.120.622.5

None

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:CustomerRelationships


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value437468506505538590636562606643743
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.16.67.77.18.18.79.58.69.411.012.8
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value8.79.310119.110.01019131416
Percentage of FiniteLivedIntangibleAssetsNet2.02.02.02.21.71.71.63.52.32.32.2
Percentage of Assets0.10.10.20.20.10.10.20.30.20.30.3
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value444450470490
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0
Percentage of Assets6.26.47.16.9

None

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value486492399386460479502489500447432
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.87.06.05.46.97.17.57.57.87.77.5

None

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value19471863198323221944194518622038190018691965
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets27.326.330.032.429.228.827.831.129.632.033.9

None

us-gaap:DebtCurrent

us-gaap:DebtCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3738383940403839404059
Percentage of DebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.60.50.60.60.60.60.60.71.0

None

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302017-12-31
Value3636373737363553
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.60.50.60.60.60.9

None

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value10231024103711459579989821047748746771
Percentage of AccountsPayableAndAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.414.515.716.014.414.814.616.011.612.813.3

None

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedIncomeTaxesCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value35404459938760438.91335
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.60.70.81.41.30.90.70.10.20.6

None

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value112111114118
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0
Percentage of Assets1.61.61.71.7

None

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1129211118918519720190228235234
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.31.72.62.82.93.01.43.54.04.0

None

us-gaap:LongTermDebt

us-gaap:LongTermDebt


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value261126202662266826742681
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0
Percentage of Assets39.436.640.039.539.941.0

None

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


None
Period End2020-09-302020-06-302019-12-312018-12-312018-09-302018-06-302017-12-31
Value3239324326202644264630022784
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets45.445.836.640.441.151.348.0

None

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value476574110135677136107145157
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.91.11.50.20.81.22.11.72.52.7

None

us-gaap:MinorityInterest

us-gaap:MinorityInterest


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value800000.0400000.0200000.00
Percentage of MinorityInterest100.0100.0100.00.0
Percentage of Assets0.00.00.00.0

None

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value402421422352368346305366368389386
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.76.06.44.95.55.14.65.65.76.76.7

None

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value415424443457
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0
Percentage of Assets5.86.06.76.4

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value1046102910841301123412881330136014094404805034304795901025
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.714.516.418.218.519.119.820.821.97.50.08.70.00.00.00.0

us-gaap:StockholdersEquity us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment


None
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302018-12-31
Value-168.0-178.0-79.0-97.7-70.013
Percentage of StockholdersEquity-16.1-17.3-6.1-7.9-5.41.0
Percentage of Assets-2.4-2.5-1.1-1.5-1.00.2
Percentage of Assets us-gaap:InterestRateContract us-gaap:CashFlowHedging cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment0.00.00.00.00.00.0

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-178.0-168.3-79.0-97.7-70.0-14.113
Percentage of StockholdersEquity-17.3-15.5-6.1-7.9-5.4-1.11.0
Percentage of Assets-2.5-2.5-1.1-1.5-1.0-0.20.2
Percentage of Assets us-gaap:InterestRateContract us-gaap:CashFlowHedging us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment


None
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302018-12-31
Value-168.0-178.0-79.0-97.7-70.013
Percentage of StockholdersEquity-16.1-17.3-6.1-7.9-5.41.0
Percentage of Assets-2.4-2.5-1.1-1.5-1.00.2
Percentage of Assets cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment0.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-31
Value-177.4-167.7-78.4-97.1-69.4-13.5133319
Percentage of StockholdersEquity-17.2-15.5-6.0-7.9-5.4-1.01.07.03.9
Percentage of Assets-2.5-2.5-1.1-1.5-1.0-0.20.20.00.3
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.0

None

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value1046102910841301
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0
Percentage of Assets14.714.616.418.2

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value-4.1-4.0-4.0-6.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.4-0.4-0.4-0.5
Percentage of Assets-0.1-0.1-0.1-0.1
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value-167.4-177.4-167.7-78.4
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-16.0-17.2-15.5-6.0
Percentage of Assets-2.3-2.5-2.5-1.1
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value-310.3-361.4-396.8-242.8
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-29.6-35.1-36.6-18.7
Percentage of Assets-4.4-5.1-6.0-3.4
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value-138.8-180.0-225.1-158.4
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-13.3-17.5-20.8-12.2
Percentage of Assets-1.9-2.5-3.4-2.2
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.0

us-gaap:AdditionalPaidInCapital


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value2835283228222819
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest270.8275.1260.2216.7
Percentage of Assets39.840.042.639.4
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.0

us-gaap:CommonStock


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value22222222
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest2.12.12.01.7
Percentage of Assets0.30.30.30.3
Percentage of Assets us-gaap:CommonStock0.00.00.00.0

us-gaap:NoncontrollingInterest


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value0.80.40.20.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.10.00.00.0
Percentage of Assets0.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.0

us-gaap:Parent


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value1046102910841301
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest99.9100.0100.0100.0
Percentage of Assets14.714.516.418.2
Percentage of Assets us-gaap:Parent0.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value-1500.9-1463.6-1362.8-1297.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-143.4-142.1-125.7-99.7
Percentage of Assets-21.1-20.7-20.6-18.1
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.0

None

us-gaap:CommonStockValue

us-gaap:CommonStockValue


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value222222222121212120141451
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.30.30.30.30.30.30.225.0

None

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-01-01
Value2835283228222819281028142801279127891770305187
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets39.840.042.639.442.241.641.842.643.430.35.30.0

None

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-01-01
Value-1500.9-1463.6-1362.8-1297.0-1300.1-1311.8-1318.1-1298.4-1302.2-1253.5-1165.2-493.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-21.1-20.7-20.6-18.1-19.5-19.4-19.7-19.8-20.2-21.4-20.10.0

None

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-310300000.0-361400000.0-396800000.0-242800000.0-298100000.0-236200000.0-174600000.0-154400000.0-98800000.0-91100000.0-87200000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-4.4-5.1-6.0-3.4-4.5-3.5-2.6-2.4-1.5-1.6-1.5

None

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


None
Period End2020-06-302020-03-312019-12-312019-09-302018-12-31
Value400000.0400000.0400000.0400000.00
Percentage of TreasuryStockValue100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.0

None

us-gaap:MinorityInterest

us-gaap:MinorityInterest


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value800000.0400000.0200000.00
Percentage of MinorityInterest100.0100.0100.00.0
Percentage of Assets0.00.00.00.0

None

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9.8121116121123141611209.3
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9.812111516121123141610149.3
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.00.0100.0100.0100.099.6100.0100.084.968.3100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Parent


None
Period End2020-09-302020-06-302020-03-31
Value9.81211
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0
Percentage of Assets0.00.00.0
Percentage of Assets us-gaap:Parent0.00.00.0

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value77-50.0-249.93695756-214.937139-8.8-170.6246-3.4
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.0-2.9-13.214.22.72.7-11.31.66.7-0.4-9.712.0-0.2

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-13.1-92.3-131.444-19.2-24.3-275.9-42.7-138.4-16.7-20.2-50.2-110.7
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.7-5.3-6.91.7-0.9-1.1-14.5-1.8-6.7-0.8-1.1-2.4-6.5

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-20.7626-23.9-18.7-39.0-19.9-12.0-18.3563-39.9221-0.3-5.9
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.135.9-1.3-0.7-1.8-0.9-0.6-0.827.1-2.012.5-0.0-0.3

None

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


None
Period End2020-09-302019-09-30
Value43-0.5
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.3-0.0

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value77-50.0-249.93695756-214.937139-8.8-170.6246-3.4
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.0-2.9-13.214.22.72.7-11.31.66.7-0.4-9.712.0-0.2

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-37.3-100.8-55.13.1116.3-20.9-18.0-48.7-32.2-92.924-78.6-47.3
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-5.8-2.90.10.60.3-1.1-0.7-2.3-1.6-5.31.2-4.6-2.8

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:Parent


None
Period End2020-09-302020-06-302020-03-31
Value-37.3-100.8-55.1
Percentage of NetIncomeLoss100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-5.8-2.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Parent0.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-37.3-100.8-55.13.1116.3-20.9-12.9-41.4-33.5-92.924-78.6
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.071.785.0104.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-5.8-2.90.10.60.3-1.1-0.5-2.0-1.7-5.31.2-4.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value6474727375747377717169776465
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9.5121115161514322412131511
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2.41.83.20.91.21.31.02.12.64.43.45.34.4
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-13.1-92.3-131.444-19.2-24.3-275.9-42.7-138.4-16.7-20.2-50.2-110.7
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.7-5.3-6.91.7-0.9-1.1-14.5-1.8-6.7-0.8-1.1-2.4-6.5

None

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9.18.09.832171613223010203326
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:PaymentsToAcquireInvestments

us-gaap:PaymentsToAcquireInvestments


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-30
Value112.21.70.01.51.10.00.0
Percentage of PaymentsToAcquireInvestments100.0100.0100.00.0100.0100.00.00.0

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-20.7626-23.9-18.7-39.0-19.9-12.0-18.3563-39.9221-0.3-5.9
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.135.9-1.3-0.7-1.8-0.9-0.6-0.827.1-2.012.5-0.0-0.3

None

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value6.66.70.06.76.66.96.87.1307227261737
Percentage of RepaymentsOfLongTermDebt100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateStatedPercentage

cwk:SeniorSecuredNoteDueMay2028, cwk:SeniorSecuredNote


None
Period End2020-05-22
Value0.0675
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations cwk:SeniorSecuredNoteDueMay2028 cwk:SeniorSecuredNote0.0

None

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

cwk:PerformanceBasedEmployeeStockOption


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value1400000.01400000.01400000.01400000.01400000.01400000.01500000.01500000.01500000.01500000.01600000.03600000.02400000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:TimeBasedEmployeeStockOption


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value2400000.02500000.02500000.02600000.02700000.02700000.03000000.03300000.03300000.03300000.03500000.02200000.01600000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber171.4178.6178.6185.7192.9192.9200.0220.0220.0220.0218.861.166.7

None

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

cwk:PerformanceBasedEmployeeStockOption


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value11.6211.6411.6411.6411.6411.6211.4711.4811.511.4911.2310.910.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:TimeBasedEmployeeStockOption


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value11.5111.5211.5411.5111.4711.4711.3211.2311.2511.2610.8810.6510.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice99.199.099.198.998.598.798.797.897.898.096.997.7100.0

None

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

cwk:RestrictedStockUnitsRSUsCoInvestment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value000000100000.00
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.00.00.00.00.00.0100.00.0

cwk:RestrictedStockUnitsRSUsPerformanceBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value100000.0100000.0400000.0000400000.000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.00.00.00.00.00.00.00.00.0

cwk:RestrictedStockUnitsRSUsTimeBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302016-11-20
Value300000.0200000.01600000.000100000.01800000.0100000.001800000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.00.00.00.00.00.00.0100.00.00.0

None

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value995942450872469476463965997434503467271391424547
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:AccountsReceivableSecuritizationProgramCosts

cwk:AccountsReceivableSecuritizationProgramCosts


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value300000.0300000.0600000.0300000.0400000.0300000.01900000.01400000.0800000.0700000.0700000.0
Percentage of AccountsReceivableSecuritizationProgramCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:ChangeinAdjustedEBIDTA us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

cwk:ChangeinAdjustedEBIDTA

us-gaap:OperatingSegments, cwk:AmericasSegment


None
Period End2020-09-302020-06-302020-03-31
Value-35.0-0.56-0.09
Percentage of ChangeinAdjustedEBIDTA100.0100.0100.0

us-gaap:OperatingSegments, cwk:AsiaPacificSegment


None
Period End2020-09-302020-06-302020-03-31
Value6.00.06-0.48
Percentage of ChangeinAdjustedEBIDTA-17.1-10.7533.3

us-gaap:OperatingSegments, cwk:EuropeTheMiddleEastAndAfricaSegment


None
Period End2020-09-302020-06-302020-03-31
Value-43.00.69-16.0
Percentage of ChangeinAdjustedEBIDTA122.9-123.217777.8

cwk:ChangeinRevenueAmount

cwk:ChangeinRevenueAmount


None
Period End2020-09-302020-06-302020-03-31
Value-9.0-0.180
Percentage of ChangeinRevenueAmount100.0100.00.0

cwk:ChangeinRevenueAmount us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cwk:AmericasSegment


None
Period End2020-09-302020-06-302020-03-31
Value-6.0-0.160.04
Percentage of ChangeinRevenueAmount66.788.90.0

us-gaap:OperatingSegments, cwk:AsiaPacificSegment


None
Period End2020-09-302020-06-302020-03-31
Value-21.0-0.27-0.18
Percentage of ChangeinRevenueAmount233.3150.00.0

us-gaap:OperatingSegments, cwk:EuropeTheMiddleEastAndAfricaSegment


None
Period End2020-09-302020-06-302020-03-31
Value-5.0-0.10.04
Percentage of ChangeinRevenueAmount55.655.60.0

cwk:EarningsBeforeInterestTaxesDepreciationAndAmortizationOtherAdjustments

cwk:EarningsBeforeInterestTaxesDepreciationAndAmortizationOtherAdjustments


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3.6203.98.06.15.46.52.43.02.52.15.73.4
Percentage of EarningsBeforeInterestTaxesDepreciationAndAmortizationOtherAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:IncomeLossFromContinuingOperationsBeforeInterestTaxesDepreciationAndAmortization us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

cwk:IncomeLossFromContinuingOperationsBeforeInterestTaxesDepreciationAndAmortization

us-gaap:OperatingSegments, cwk:AmericasSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value81536418112512270136128122621437690
Percentage of IncomeLossFromContinuingOperationsBeforeInterestTaxesDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cwk:AsiaPacificSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value24389.64623361832212620371218
Percentage of IncomeLossFromContinuingOperationsBeforeInterestTaxesDepreciationAndAmortization30.072.315.025.518.429.926.023.516.521.833.425.916.920.2

us-gaap:OperatingSegments, cwk:EuropeTheMiddleEastAndAfricaSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1126-3.4642015-0.2672920-8.6861322
Percentage of IncomeLossFromContinuingOperationsBeforeInterestTaxesDepreciationAndAmortization14.248.5-5.335.716.212.6-0.349.522.516.4-13.860.217.024.9

cwk:IncreaseDecreaseInBeneficialInterestInSecuritizationNoncash

cwk:IncreaseDecreaseInBeneficialInterestInSecuritizationNoncash


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value6.914-7.97.72.4-5.87.58.118-9.3-3.9-1.3-13.5
Percentage of IncreaseDecreaseInBeneficialInterestInSecuritizationNoncash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:OperatingLeaseRightofUseAssetAmortization

cwk:OperatingLeaseRightofUseAssetAmortization


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value292827332828270.00.00.00.0
Percentage of OperatingLeaseRightofUseAssetAmortization100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

cwk:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentExcludingRedemptionsOrPurchaseOfInterestsNetOfTax

cwk:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentExcludingRedemptionsOrPurchaseOfInterestsNetOfTax


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4145-66.7-34.4-5.87.3-24.3-12.2-35.910
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentExcludingRedemptionsOrPurchaseOfInterestsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentExcludingRedemptionsOrPurchaseOfInterestsNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4145-66.737-34.4-5.87.3-24.3-12.2-35.910
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentExcludingRedemptionsOrPurchaseOfInterestsNetOfTax100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedTranslationAdjustment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4145-66.737-34.4-5.87.3-24.3-12.2-35.910
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentExcludingRedemptionsOrPurchaseOfInterestsNetOfTax100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Parent


None
Period End2020-09-302020-06-302020-03-31
Value4145-66.7
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentExcludingRedemptionsOrPurchaseOfInterestsNetOfTax100.0100.0100.0

cwk:ProceedsFromAccountsReceivableSecuritizationReceivedFromTradeAccountsReceivableSoldToThirdParty

cwk:ProceedsFromAccountsReceivableSecuritizationReceivedFromTradeAccountsReceivableSoldToThirdParty


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value283266307334297264302299291252259245254
Percentage of ProceedsFromAccountsReceivableSecuritizationReceivedFromTradeAccountsReceivableSoldToThirdParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges

us-gaap:AssetImpairmentCharges


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.40.02.88.30.00.03.92.70.00.00.0
Percentage of AssetImpairmentCharges100.00.0100.0100.00.00.0100.0100.00.00.00.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts

us-gaap:BusinessCombinationAcquisitionRelatedCosts


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value287015388.06.03.7520.00.0
Percentage of BusinessCombinationAcquisitionRelatedCosts100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:BusinessCombinationIntegrationRelatedCosts

us-gaap:BusinessCombinationIntegrationRelatedCosts


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value12171738292221667141661157179
Percentage of BusinessCombinationIntegrationRelatedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalLeaseObligationsIncurred

us-gaap:CapitalLeaseObligationsIncurred


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.00.32.24.33.03.21.83.11.42.00.77.64.3
Percentage of CapitalLeaseObligationsIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-405.2395-0.512-502.8-23.1564-65.430196-120.0
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:DebtInstrument, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

cwk:A2018CreditAgreement, us-gaap:LondonInterbankOfferedRateLIBOR


None
Period End2020-03-31
Value0.0275
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:StatementScenario, us-gaap:DebtInstrument, us-gaap:VariableRate

srt:ScenarioForecast, cwk:A2018CreditAgreement, cwk:EurodollarRate


None
Period End2025-08-212020-01-20
Value0.03250.0275
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.00.0

srt:ScenarioForecast, cwk:A2018CreditAgreement, us-gaap:BaseRate


None
Period End2025-08-212020-01-20
Value0.02250.0175
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.00.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9.08.1-16.57.1-6.50.80.7-8.7-1.4-3.35.2-0.30.6
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings us-gaap:FairValueByLiabilityClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings

cwk:EarnOutLiabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-600000.01200000.0-600000.03800000.0300000.0100000.0-200000.0500000.02700000.0-500000.0-800000.0-300000.05500000.0100000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases us-gaap:FairValueByLiabilityClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases

cwk:EarnOutLiabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value0.00.0126.20.00.00.03.92.05.4-4.9311.9
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases0.00.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements us-gaap:FairValueByLiabilityClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements

cwk:EarnOutLiabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value8.23.3-0.1-47.09.8130.00.0145.42.71.30.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value3100000.03200000.03600000.03200000.03200000.02800000.01300000.06600000.0900000.0
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyTransactionGainLossUnrealized

us-gaap:ForeignCurrencyTransactionGainLossUnrealized


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.110-5.84.7-1.50.00.0-0.61.8-8.2-1.4
Percentage of ForeignCurrencyTransactionGainLossUnrealized100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0

us-gaap:GainLossOnDerivativeInstrumentsNetPretax us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:ForeignExchangeForward, us-gaap:Nondesignated


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2100000.0600000.0-400000.01600000.0-700000.0600000.0-100000.00-1500000.02600000.0-2600000.03900000.0-3000000.0
Percentage of GainLossOnDerivativeInstrumentsNetPretax100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:GoodwillAcquiredDuringPeriod

us-gaap:GoodwillAcquiredDuringPeriod


None
Period End2020-03-312019-03-31
Value109163
Percentage of GoodwillAcquiredDuringPeriod100.0100.0

us-gaap:GoodwillAcquiredDuringPeriod us-gaap:StatementBusinessSegments

cwk:AmericasSegment


None
Period End2020-03-312019-03-31
Value83150
Percentage of GoodwillAcquiredDuringPeriod75.992.2

cwk:AsiaPacificSegment


None
Period End2020-03-312019-03-31
Value0.012
Percentage of GoodwillAcquiredDuringPeriod0.07.8

cwk:EuropeTheMiddleEastAndAfricaSegment


None
Period End2020-03-312019-03-31
Value260.0
Percentage of GoodwillAcquiredDuringPeriod24.10.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2330-48.126-20.4-5.05.0-14.1-7.5
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss us-gaap:StatementBusinessSegments

cwk:AmericasSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1.22.1-4.81.1-0.71.31.4-3.10.9
Percentage of GoodwillForeignCurrencyTranslationGainLoss5.26.910.04.13.4-26.028.022.0-12.0

cwk:AsiaPacificSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value9.326-30.710-10.6-3.02.0-6.3-6.2
Percentage of GoodwillForeignCurrencyTranslationGainLoss39.986.663.838.452.060.040.044.782.7

cwk:EuropeTheMiddleEastAndAfricaSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value122.0-12.615-9.1-3.31.6-4.7-2.2
Percentage of GoodwillForeignCurrencyTranslationGainLoss54.96.626.257.544.666.032.033.329.3

us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:GoodwillPurchaseAccountingAdjustments


None
Period End2020-06-302020-03-312019-12-312019-09-302018-12-312018-09-30
Value-5.03.90.10.82.21.4
Percentage of GoodwillPurchaseAccountingAdjustments100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillPurchaseAccountingAdjustments us-gaap:StatementBusinessSegments

cwk:AmericasSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-30
Value0.4-4.73.90.00.50.01.4
Percentage of GoodwillPurchaseAccountingAdjustments0.094.0100.00.062.50.0100.0

cwk:AsiaPacificSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302018-12-312018-09-30
Value0.00.00.10.32.10.0
Percentage of GoodwillPurchaseAccountingAdjustments-0.00.0100.037.595.50.0

cwk:EuropeTheMiddleEastAndAfricaSegment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-30
Value0.7-0.30.00.00.00.10.0
Percentage of GoodwillPurchaseAccountingAdjustments0.06.00.00.00.04.50.0

us-gaap:GoodwillWrittenOffRelatedToSaleOfBusinessUnit

us-gaap:GoodwillWrittenOffRelatedToSaleOfBusinessUnit


None
Period End2020-09-302020-06-302020-03-31
Value0.00.025
Percentage of GoodwillWrittenOffRelatedToSaleOfBusinessUnit0.00.0100.0

us-gaap:GoodwillWrittenOffRelatedToSaleOfBusinessUnit us-gaap:StatementBusinessSegments

cwk:AsiaPacificSegment


None
Period End2020-09-302020-06-302020-03-31
Value0.00.025
Percentage of GoodwillWrittenOffRelatedToSaleOfBusinessUnit0.00.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2800000.01700000.01300000.0600000.0700000.0500000.0800000.0700000.0400000.0400000.0400000.0400000.0500000.0100000.0
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value148.02010.01323119.4131610117.8
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables

us-gaap:IncreaseDecreaseInAccountsAndOtherReceivables


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value21-64.7-227.616021-13.9-128.5232-32.367-31.611122
Percentage of IncreaseDecreaseInAccountsAndOtherReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-13.9-23.7-109.4167-13.222-116.0857.8-17.7-0.7-25.176
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-3.2-4.9-14.9-14.31.118214.6-3.2-31.2101.46.7
Percentage of IncreaseDecreaseInAccruedIncomeTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value189.734-90.7392476-3.338-29.9543046
Percentage of IncreaseDecreaseInDeferredIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities

us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value67-86.4-280.82125143-243.91844039-146.714681
Percentage of IncreaseDecreaseInEmployeeRelatedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-16.67.9-4.34.8-23.6-18.95.3-15.8-62.715-21.2-17.1-11.3
Percentage of IncreaseDecreaseInOtherNoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-20.0-23.2-22.5-53.1-41.4-33.0-37.3-177.5-22.5-20.33.524-7.8
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-4.4-17.3562.541119-7.8-42.6284.137-6.2-2.5
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:EmployeeStockOption


None
Period End2020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value01500000.01500000.01500000.0000
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements0.0100.0100.0100.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


None
Period End2020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value05300000.05000000.06400000.0000
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements0.0353.3333.3426.70.00.00.0

us-gaap:LiabilitiesAssumed1

us-gaap:LiabilitiesAssumed1


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.0-0.832100.03.78.6128.60.00.06.441
Percentage of LiabilitiesAssumed10.0100.0100.0100.00.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:NoncontrollingInterestIncreaseFromBusinessCombination

us-gaap:NoncontrollingInterestIncreaseFromBusinessCombination


None
Period End2020-09-302020-06-302020-03-31
Value400000.0200000.0200000.0
Percentage of NoncontrollingInterestIncreaseFromBusinessCombination100.0100.0100.0

us-gaap:NoncontrollingInterestIncreaseFromBusinessCombination us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


None
Period End2020-09-302020-06-302020-03-31
Value400000.0200000.0200000.0
Percentage of NoncontrollingInterestIncreaseFromBusinessCombination100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-06-30
Value0.00.010
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax0.00.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value19-12.0-85.317-26.6-54.1-25.2-31.17.616149.1-3.9
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment


None
Period End2020-09-302019-09-30
Value19-26.6
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value-12.0-85.3-26.6-54.1-25.2
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax us-gaap:StatementEquityComponents

cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment


None
Period End2020-09-302019-09-30
Value19-26.6
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-03-31
Value19-12.0-85.3-26.6-54.1-25.214
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value19-12.0-85.317-26.6-54.1-25.2-31.17.616149.1-3.9
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Parent


None
Period End2020-09-302020-06-302020-03-31
Value19-12.0-85.3
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:HedgingDesignation

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:DesignatedAsHedgingInstrument


None
Period End2020-09-302020-06-302020-03-31
Value9400000.0-10400000.0-164500000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment


None
Period End2020-09-302019-09-30
Value9.31.1
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value-2.34.01.11.82.2
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.00.0100.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:StatementEquityComponents

cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment


None
Period End2020-09-302019-09-30
Value9.31.1
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value-2.34.01.11.82.2
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.00.0100.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value5135-154.0-61.9-61.6-20.2-7.5-27.923
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-2.0-0.2-0.10.1-0.6-0.1-0.30.2-2.0-0.1
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-2.01.3-0.2-0.10.1-0.6-0.1-0.30.2-2.0-0.1
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-2.01.3-0.2-0.10.1-0.6-0.1-0.30.2-2.0-0.1
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Parent


None
Period End2020-03-31
Value-2.0
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.10.0-2.01.3-0.2-0.10.1-0.6-0.1-0.30.2-4.4-0.1-0.8
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


None
Period End2020-09-302019-09-302019-06-30
Value0.1-0.2-0.1
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-09-302019-09-302019-06-30
Value0.1-0.2-0.1
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0

us-gaap:Parent


None
Period End2020-09-30
Value0.1
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value10-3.836-1.16.511-0.20.111-6.6-1.3-3.0-1.4
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities


None
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.10.99.76.70.00.0145.32.51.30.0
Percentage of PaymentForContingentConsiderationLiabilityFinancingActivities100.0100.0100.0100.00.00.0100.0100.0100.0100.00.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherInvestingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value700000.007800000.0-800000.00004700000.0100000.00-200000.0-1000000.00
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.00.0100.0100.00.00.00.0100.0100.00.0100.0100.00.0

us-gaap:PaymentsForRestructuring

us-gaap:PaymentsForRestructuring


None
Period End2020-09-302020-06-302020-03-312018-12-312018-09-30
Value8.499999999999996194.31.52.7
Percentage of PaymentsForRestructuring100.0100.0100.0100.0100.0

us-gaap:PaymentsForRestructuring us-gaap:RestructuringCostAndReserve

us-gaap:ContractTermination


None
Period End2020-09-302020-06-302020-03-312018-12-312018-09-30
Value2.06.50.41.31.9
Percentage of PaymentsForRestructuring23.533.39.386.770.4

us-gaap:EmployeeSeverance


None
Period End2020-09-302020-06-302020-03-312018-12-312018-09-30
Value6.5133.90.20.8
Percentage of PaymentsForRestructuring76.566.790.713.329.6

us-gaap:PaymentsForRestructuring us-gaap:RestructuringCostAndReserve, us-gaap:StatementBusinessSegments

us-gaap:ContractTermination, srt:Americas


None
Period End2020-09-302020-06-302020-03-31
Value2.06.50.4
Percentage of PaymentsForRestructuring23.533.39.3

us-gaap:EmployeeSeverance, srt:Americas


None
Period End2020-09-302020-06-302020-03-31
Value3.37.03.9
Percentage of PaymentsForRestructuring38.835.990.7

us-gaap:EmployeeSeverance, srt:AsiaPacific


None
Period End2020-09-302020-06-302020-03-31
Value2.21.00.0
Percentage of PaymentsForRestructuring25.95.10.0

us-gaap:EmployeeSeverance, us-gaap:EMEA


None
Period End2020-09-302020-06-302020-03-31
Value1.05.00.0
Percentage of PaymentsForRestructuring11.825.60.0

us-gaap:PaymentsForRestructuring us-gaap:StatementBusinessSegments

srt:Americas


None
Period End2020-09-302020-06-302020-03-31
Value5.3134.3
Percentage of PaymentsForRestructuring62.469.2100.0

srt:AsiaPacific


None
Period End2020-09-302020-06-302020-03-31
Value2.21.00.0
Percentage of PaymentsForRestructuring25.95.10.0

us-gaap:EMEA


None
Period End2020-09-302020-06-302020-03-31
Value1.05.00.0
Percentage of PaymentsForRestructuring11.825.60.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.011110.00.00.00.00.0220.01.80.00.0
Percentage of PaymentsOfDebtIssuanceCosts0.0100.0100.00.00.00.00.00.0100.00.0100.00.00.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value7.52.48.96.6192.73.18.54.60.02.10.62.2
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.00.01027.40.06.326213220.00.01779
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired0.00.0100.0100.00.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:PaymentsToAcquireOtherInvestments

us-gaap:PaymentsToAcquireOtherInvestments


None
Period End2020-09-302019-09-30
Value3.32.2
Percentage of PaymentsToAcquireOtherInvestments100.0100.0

us-gaap:ProceedsFromAccountsReceivableSecuritization

us-gaap:ProceedsFromAccountsReceivableSecuritization


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value291255299345300251302315309241276238250
Percentage of ProceedsFromAccountsReceivableSecuritization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ProceedsFromIssuanceOfDebt

cwk:SeniorSecuredNoteDueMay2028, cwk:SeniorSecuredNote


None
Period End2020-05-22
Value638
Percentage of ProceedsFromIssuanceOfDebt100.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt


None
Period End2020-09-30
Value0.0
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

cwk:SeniorSecuredNoteDueMay2028, cwk:SeniorSecuredNote


None
Period End2020-05-22
Value650
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value600000.01400000.0-300000.0-2400000.0-100000.0-500000.0700000.0-400000.0-2400000.0-3000000.0-1500000.02300000.0800000.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value8.6134.33.99.42.86.09.31.25.75.5-2.14.1
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9.3-2.34.01.11.82.20.83.09.20.2-7.8-5.7
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302018-03-31
Value9.3-2.34.01.11.80.2
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9.3-2.34.0-1.31.11.82.20.83.09.20.2-7.8-5.7
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Parent


None
Period End2020-09-302020-06-302020-03-31
Value9.3-2.34.0
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodTax us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodTax

cwk:AccumulatedGainLossNetCashFlowHedgeParentExclusiveOfImpairment


None
Period End2020-09-302019-09-30
Value700000.0800000.0
Percentage of ReclassificationFromAociCurrentPeriodTax100.0100.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-06-30
Value700000.0700000.01100000.0
Percentage of ReclassificationFromAociCurrentPeriodTax0.00.00.0

us-gaap:RestructuringCharges

us-gaap:RestructuringCharges


None
Period End2020-09-302020-06-302020-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-30
Value125.923-1.8-1.2-6.5152.610
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCharges us-gaap:RestructuringCostAndReserve

us-gaap:ContractTermination


None
Period End2020-09-302020-06-302020-03-312018-12-312018-09-30
Value2.63.73.4-0.41.1
Percentage of RestructuringCharges20.262.714.622.2-91.7

us-gaap:EmployeeSeverance


None
Period End2020-09-302020-06-302020-03-312018-12-312018-09-30
Value102.219-1.4-2.3
Percentage of RestructuringCharges79.837.385.477.8191.7

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

us-gaap:ContractTermination, srt:Americas


None
Period End2020-09-302020-06-302020-03-31
Value2.63.73.4
Percentage of RestructuringCharges20.262.714.6

us-gaap:EmployeeSeverance, srt:Americas


None
Period End2020-09-302020-06-302020-03-31
Value4.61.212
Percentage of RestructuringCharges35.720.354.1

us-gaap:EmployeeSeverance, srt:AsiaPacific


None
Period End2020-09-302020-06-302020-03-31
Value3.30.90.1
Percentage of RestructuringCharges25.615.30.4

us-gaap:EmployeeSeverance, us-gaap:EMEA


None
Period End2020-09-302020-06-302020-03-31
Value2.40.17.2
Percentage of RestructuringCharges18.61.730.9

us-gaap:RestructuringCharges us-gaap:StatementBusinessSegments

srt:Americas


None
Period End2020-09-302020-06-302020-03-31
Value7.24.916
Percentage of RestructuringCharges55.883.168.7

srt:AsiaPacific


None
Period End2020-09-302020-06-302020-03-31
Value3.30.90.1
Percentage of RestructuringCharges25.615.30.4

us-gaap:EMEA


None
Period End2020-09-302020-06-302020-03-31
Value2.40.17.2
Percentage of RestructuringCharges18.61.730.9

us-gaap:RestructuringSettlementAndImpairmentProvisions

us-gaap:RestructuringSettlementAndImpairmentProvisions


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value135.8268.4-0.60.23.91.0-1.2-6.410152.510
Percentage of RestructuringSettlementAndImpairmentProvisions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod

cwk:RestrictedStockUnitsRSUsCoInvestment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0000000100000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod0.00.00.00.00.00.00.0100.0

cwk:RestrictedStockUnitsRSUsPerformanceBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value100000.000000000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod0.00.00.00.00.00.00.00.00.0

cwk:RestrictedStockUnitsRSUsTimeBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value200000.00100000.0000100000.0-100000.0100000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod0.00.00.00.00.00.00.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

cwk:RestrictedStockUnitsRSUsCoInvestment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value00017.0000.36-1.05
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue0.00.00.0100.00.00.0100.0100.0

cwk:RestrictedStockUnitsRSUsPerformanceBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value18.700000000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue0.00.00.00.00.00.00.00.0-0.0

cwk:RestrictedStockUnitsRSUsTimeBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-0.240.0317.70.080.073.8912.51-0.02-0.02
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue0.00.00.00.00.40.00.0-5.61.9

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

cwk:RestrictedStockUnitsRSUsPerformanceBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-0.34-0.3717.9600019.640-0.5
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.00.00.00.0100.00.0100.0

cwk:RestrictedStockUnitsRSUsTimeBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-0.8-0.6116.870-0.06-0.0117.850.090
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue235.3164.993.90.00.00.090.90.0-0.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod

cwk:RestrictedStockUnitsRSUsCoInvestment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0000600000.0000100000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod0.00.00.00.0100.00.00.00.0100.0

cwk:RestrictedStockUnitsRSUsPerformanceBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value00100000.00000200000.00
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod0.00.00.00.00.00.00.00.00.0

cwk:RestrictedStockUnitsRSUsTimeBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1500000.0500000.01300000.0800000.02600000.0300000.0200000.0700000.0700000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod0.00.00.00.0433.30.00.00.0700.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

cwk:RestrictedStockUnitsRSUsCoInvestment


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0017.00.04-4.16-1.517.00-1.68
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.00.0100.0100.0100.0100.0100.00.0100.0

cwk:RestrictedStockUnitsRSUsPerformanceBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0017.29000017.290
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.00.0101.70.0-0.0-0.00.00.0-0.0

cwk:RestrictedStockUnitsRSUsTimeBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.51-0.9715.193.3-1.752.6513.212.86-1.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.00.089.48250.042.1-176.777.70.059.5

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod

us-gaap:CommonStock


None
Period End2020-09-302020-06-302019-09-302019-06-302018-09-30
Value1000000.0300000.02000000.0300000.0600000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod100.0100.0100.0100.0100.0

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-6900000.0-2200000.0-9000000.0-19400000.0-2600000.0-3100000.0-4600000.0
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


None
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-7000000.0-2200000.0-9100000.0-19600000.0-2600000.0-3100000.0-4700000.0
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation101.4100.0101.1101.0100.0100.0102.2

us-gaap:CommonStock


None
Period End2020-09-302020-06-302020-03-312019-09-302018-09-30
Value100000.00100000.0200000.0100000.0
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation-1.4-0.0-1.1-1.0-2.2

us-gaap:Parent


None
Period End2020-09-302020-06-302020-03-31
Value-6900000.0-2200000.0-9000000.0
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation100.0100.0100.0

cwk:TransferorsInterestsInTransferredFinancialAssetsAmountDrawnOnInvestmentLimit

cwk:TransferorsInterestsInTransferredFinancialAssetsAmountDrawnOnInvestmentLimit


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value85850.00.00.00.00.085
Percentage of TransferorsInterestsInTransferredFinancialAssetsAmountDrawnOnInvestmentLimit100.0100.00.00.00.00.00.0100.0

us-gaap:AccountsAndOtherReceivablesNetCurrent

us-gaap:AccountsAndOtherReceivablesNetCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value12101184124415241352136213701463129913451314
Percentage of AccountsAndOtherReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableFromSecuritization

us-gaap:AccountsReceivableFromSecuritization


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value177169180187163160173173157138132
Percentage of AccountsReceivableFromSecuritization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableRelatedPartiesCurrent us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AccountsReceivableRelatedPartiesCurrent

srt:AffiliatedEntity


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3328293334383731314034
Percentage of AccountsReceivableRelatedPartiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableRelatedPartiesNoncurrent us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AccountsReceivableRelatedPartiesNoncurrent

srt:AffiliatedEntity


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value190207219198208223231214215227232
Percentage of AccountsReceivableRelatedPartiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedIncomeTaxesNoncurrent

us-gaap:AccruedIncomeTaxesNoncurrent


None
Period End2020-09-302020-06-302019-12-31
Value292928
Percentage of AccruedIncomeTaxesNoncurrent100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value8174635856575149424435
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4783496726110510514622232714459
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3.10.16.81.01.80.11.00.5102417
Percentage of AssetsFairValueDisclosure0.60.010.10.41.70.10.70.23.316.829.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value16515874661441411471401322841
Percentage of AssetsFairValueDisclosure34.645.4111.025.6137.2134.7101.063.040.319.970.2

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value647508149329251247294362470197118
Percentage of AssetsFairValueDisclosure135.3145.5221.1125.9238.9234.8201.6163.2143.6136.7199.2

us-gaap:BusinessCombinationContingentConsiderationLiability us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:BusinessCombinationContingentConsiderationLiability

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1524362415253838334351
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationLiability us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1524362415253838334351
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4333022720652519417327190
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4333022720652519417327190
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetNet us-gaap:BalanceSheetLocation

us-gaap:ContractWithCustomerAssetNet

us-gaap:OtherNoncurrentAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value23201326131518252539
Percentage of ContractWithCustomerAssetNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PrepaidExpensesAndOtherCurrentAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value323324337313307247135160184140
Percentage of ContractWithCustomerAssetNet1360.51596.62535.31173.82310.51615.7752.8622.5716.7352.6

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4952515450535066585646
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value33003300270027002700270027002700270031002900
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateEffectivePercentage

cwk:A2018FirstLienLoan, us-gaap:SecuredDebt


None
Period End2020-09-302020-06-30
Value3.20.03
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0

cwk:SeniorSecuredNoteDueMay2028, cwk:SeniorSecuredNote


None
Period End2020-05-22
Value0.07
Percentage of DebtInstrumentInterestRateEffectivePercentage0.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

cwk:A2018FirstLienLoan, us-gaap:SecuredDebt


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value3435372829303131340.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

cwk:SeniorSecuredNoteDueMay2028, cwk:SeniorSecuredNote


None
Period End2020-09-302020-06-30
Value1111
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet32.231.8

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4448405149504847545259
Percentage of DeferredCompensationLiabilityCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4448405149504847545259
Percentage of DeferredCompensationLiabilityCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationPlanAssets us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DeferredCompensationPlanAssets

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4546395453535148555359
Percentage of DeferredCompensationPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationPlanAssets us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4546395453535148555359
Percentage of DeferredCompensationPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsGross us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DeferredFinanceCostsGross

cwk:SeniorSecuredNoteDueMay2028, cwk:SeniorSecuredNote


None
Period End2020-05-22
Value11
Percentage of DeferredFinanceCostsGross100.0

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxAssetsNet


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value8482798680848484676871
Percentage of DeferredIncomeTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeAssets

us-gaap:ForeignExchangeForward, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3.10.16.81.01.80.11.00.50.81.50.8
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:ForeignExchangeForward, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3.10.16.81.01.80.11.00.50.81.50.8
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:OtherNoncurrentAssets, us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.00.00.00.00.00.00.09.91.50.5
Percentage of DerivativeFairValueOfDerivativeAsset0.00.00.00.00.00.00.0100.0100.0100.0

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:OtherNoncurrentAssets, us-gaap:ForeignExchangeForward, us-gaap:Nondesignated


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3.10.16.81.01.80.11.00.50.81.50.8
Percentage of DerivativeFairValueOfDerivativeAsset0.00.00.00.00.00.00.00.08.1100.0160.0

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:OtherNoncurrentLiabilities, us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value176189183971199553250.00.00.0
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:DerivativeFairValueOfDerivativeLiability us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:OtherNoncurrentLiabilities, us-gaap:ForeignExchangeForward, us-gaap:Nondesignated


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2.10.98.52.20.70.50.70.80.91.72.2
Percentage of DerivativeFairValueOfDerivativeLiability1.20.54.62.30.60.51.33.20.00.00.0

us-gaap:DerivativeLiabilities us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeLiabilities

us-gaap:ForeignExchangeForward, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2.10.98.52.20.70.50.70.80.91.72.2
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value17618918397119955325
Percentage of DerivativeLiabilities8395.221066.72156.54440.917085.719180.07700.03137.5

us-gaap:DerivativeLiabilities us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency

us-gaap:ForeignExchangeForward, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2.10.98.52.20.70.50.70.80.91.72.2
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateSwap, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value17618918397119955325
Percentage of DerivativeLiabilities8395.221066.72156.54440.917085.719180.07700.03137.5

us-gaap:DerivativeNotionalAmount us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeNotionalAmount

us-gaap:ForeignExchangeForward, us-gaap:Nondesignated


None
Period End2020-09-302020-06-302020-03-312019-12-31
Value538543497498
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0

us-gaap:DerivativeNumberOfInstrumentsHeld us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeNumberOfInstrumentsHeld

us-gaap:ForeignExchangeForward, us-gaap:Nondesignated


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value21.026.023.022.016.023.023.027.037.024.0
Percentage of DerivativeNumberOfInstrumentsHeld100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateContract, us-gaap:DesignatedAsHedgingInstrument


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-06-30
Value5.05.05.05.05.08.0
Percentage of DerivativeNumberOfInstrumentsHeld23.819.222.731.221.721.6

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value627555637888666621580817874834864
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

cwk:RestrictedStockUnitsRSUsCoInvestment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.00.00.10.20.30.40.50.20.3
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions0.00.0100.0100.0100.0100.0100.0100.0100.0

cwk:RestrictedStockUnitsRSUsPerformanceBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1011114.95.56.06.60.32.44.1
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions0.00.00.04900.02750.02000.01650.060.01200.01366.7

cwk:RestrictedStockUnitsRSUsTimeBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value50586753647587664132
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions0.00.00.053000.032150.025300.021875.013200.020800.010800.0

us-gaap:RestrictedStockUnitsRSU


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value61697958708294664457
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions0.00.00.058000.035000.027400.023625.013360.022100.019066.7

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

cwk:TimeBasedEmployeeStockOption


None
Period End2020-09-302019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.61.93.45.06.54.14.4
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestments

us-gaap:EquityMethodInvestments


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1081051057.98.09.89.38.78.17.37.9
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue us-gaap:FairValueByLiabilityClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue

cwk:EarnOutLiabilities


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value15243624152538383343495157202230
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value928882832833774735691650609565478
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value919874826827769730687637596553468
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization99.199.199.299.399.399.499.498.097.997.997.8

us-gaap:OtherIntangibleAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value8.47.66.86.25.44.74.313131210
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization0.90.90.80.70.70.60.62.02.12.12.2

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:CustomerRelationships


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value13561342133213331307132013231199120311971211
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherIntangibleAssets


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1716171714141432262626
Percentage of FiniteLivedIntangibleAssetsGross1.31.31.31.31.11.11.12.72.22.22.2

us-gaap:GuaranteeObligationsMaximumExposure

us-gaap:GuaranteeObligationsMaximumExposure


None
Period End2020-09-30
Value41
Percentage of GuaranteeObligationsMaximumExposure100.0

us-gaap:IncomeTaxesReceivable

us-gaap:IncomeTaxesReceivable


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3536353943393841111114
Percentage of IncomeTaxesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value19201905189518961868188118841778177517691784
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestsContinuedToBeHeldByTransferorFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:InterestsContinuedToBeHeldByTransferorFairValue

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value16515874661441411471401322841
Percentage of InterestsContinuedToBeHeldByTransferorFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestsContinuedToBeHeldByTransferorFairValue us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value16515874661441411471401322841
Percentage of InterestsContinuedToBeHeldByTransferorFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:LiabilitiesFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4448405149504847545259
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value178190191991209654250.91.73.3
Percentage of LiabilitiesFairValueDisclosure402.7396.9468.9194.7242.1192.8113.554.31.73.35.5

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1524362415253838334351
Percentage of LiabilitiesFairValueDisclosure35.451.089.548.030.250.280.080.362.383.586.1

us-gaap:LiabilitiesFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2382632691751851711411118997114
Percentage of LiabilitiesFairValueDisclosure538.1547.9658.4342.7372.2343.0293.6234.6164.0186.8191.6

us-gaap:LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities

us-gaap:LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities


None
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302017-12-31
Value32753279264826582681268230372837
Percentage of LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities us-gaap:DebtInstrument, us-gaap:LongtermDebtType

cwk:A2018FirstLienLoan, us-gaap:SecuredDebt


None
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302017-12-31
Value2618262326292637266126650.0
Percentage of LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities79.980.099.399.299.399.40.0

cwk:SeniorSecuredNoteDueMay2028, cwk:SeniorSecuredNote


None
Period End2020-09-302020-06-302019-12-31
Value6396380.0
Percentage of LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities19.519.50.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities us-gaap:LongtermDebtType

us-gaap:CapitalLeaseObligations


None
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302017-12-31
Value1716182019151415
Percentage of LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities0.50.50.70.80.70.60.50.5

us-gaap:NotesPayableOtherPayables


None
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302017-12-31
Value0.30.30.30.30.40.80.821
Percentage of LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities0.00.00.00.00.00.00.00.7

us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtFairValue


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value32003200230027002700270027002600270031002800
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossContingencyAccrualAtCarryingValue us-gaap:LossContingenciesByNatureOfContingency

us-gaap:LossContingencyAccrualAtCarryingValue

cwk:ErrorsAndOmissionsClaims


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4542323033363532425054
Percentage of LossContingencyAccrualAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:WorkersCompensation


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9592836772707060717163
Percentage of LossContingencyAccrualAtCarryingValue210.2217.5256.6222.2219.3195.6201.1183.2165.7141.1117.9

us-gaap:LossContingencyAccrualCarryingValueCurrent

us-gaap:LossContingencyAccrualCarryingValueCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value116108937482838569809388
Percentage of LossContingencyAccrualCarryingValueCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossContingencyAccrualCarryingValueNoncurrent

us-gaap:LossContingencyAccrualCarryingValueNoncurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2425222223231923332729
Percentage of LossContingencyAccrualCarryingValueNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossContingencyReceivable us-gaap:LossContingenciesByNatureOfContingency

us-gaap:LossContingencyReceivable

cwk:InsuranceRecoverable


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value5.44.85.03.55.26.05.03.9171717
Percentage of LossContingencyReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidExpenseCurrent


None
Period End2020-09-302020-06-302019-12-31
Value9810870
Percentage of PrepaidExpenseCurrent100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value677159695252705852646264634217
Percentage of RestrictedCashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue us-gaap:BalanceSheetLocation

us-gaap:PrepaidExpensesAndOtherCurrentAssets


None
Period End2020-09-302019-12-312019-09-302018-12-31
Value78596970
Percentage of RestrictedCashAndCashEquivalentsAtCarryingValue0.0100.0100.0100.0

us-gaap:RestructuringReserve

us-gaap:RestructuringReserve


None
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value116.6201.2121619372835
Percentage of RestructuringReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserve us-gaap:RestructuringCostAndReserve

us-gaap:ContractTermination


None
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value0.80.23.00.0101112116.02.5
Percentage of RestructuringReserve7.33.014.90.079.573.863.329.721.17.1

us-gaap:EmployeeSeverance


None
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value106.4171.22.64.27.3262232
Percentage of RestructuringReserve92.797.085.1100.020.526.236.770.378.992.9

us-gaap:RestructuringReserveCurrent

us-gaap:RestructuringReserveCurrent


None
Period End2020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302017-12-31
Value10.06.6201.26.58.81230
Percentage of RestructuringReserveCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserveNoncurrent

us-gaap:RestructuringReserveNoncurrent


None
Period End2020-09-302018-12-312018-09-302018-06-302017-12-31
Value1000000.06200000.07200000.07800000.07300000.0
Percentage of RestructuringReserveNoncurrent100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

cwk:RestrictedStockUnitsRSUsCoInvestment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value0000600000.0600000.0600000.0500000.0700000.0700000.0800000.0500000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber0.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:RestrictedStockUnitsRSUsPerformanceBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value1500000.01500000.01400000.01100000.01100000.01100000.01100000.0700000.02200000.02400000.02500000.02500000.02500000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber0.00.00.00.00.0183.3183.3116.7440.0342.9357.1312.5500.0

cwk:RestrictedStockUnitsRSUsTimeBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value4200000.05600000.05900000.05700000.06500000.09100000.09300000.07800000.07000000.07700000.07100000.07600000.01200000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber0.00.00.00.00.01516.71550.01300.01400.01100.01014.3950.0240.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

cwk:RestrictedStockUnitsRSUsCoInvestment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value0017.014.4111.3311.3811.511.5611.3811.2810.910.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cwk:RestrictedStockUnitsRSUsPerformanceBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value17.0416.4617.3417.0817.0817.0817.0815.941.091.681.51.51.5
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue0.00.00.0100.5118.5150.8150.1138.69.414.813.313.815.0

cwk:RestrictedStockUnitsRSUsTimeBased


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-31
Value15.8315.9616.0315.6315.815.2415.3214.6314.314.2613.4813.3611.4
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue0.00.00.091.9109.6134.5134.6127.2123.7125.3119.5122.6114.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

cwk:TimeBasedEmployeeStockOption


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3700000.01900000.02000000.01900000.01800000.02200000.01900000.01900000.01000000.01000000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

cwk:TimeBasedEmployeeStockOption


None
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value11.4210.8210.810.6710.6310.5310.5810.3510.5710.67
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


TTM Greenblatt ROC
_
(None,)
None
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
('us-gaap:OperatingSegments', None)
None
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:TimingOfTransferOfGoodOrService
(None, 'us-gaap:TransferredAtPointInTime')
None
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementBusinessSegments
(None,)
None
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
(None,)
None
us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:StockholdersEquity
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents
('us-gaap:InterestRateContract', 'us-gaap:CashFlowHedging', None)
None
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:Goodwill
us-gaap:StatementBusinessSegments
(None,)
None
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
None
us-gaap:StockholdersEquity
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:StatementEquityComponents
('us-gaap:InterestRateContract', 'us-gaap:CashFlowHedging', None)
None
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents
(None,)
None
us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents
(None,)
None