CTSH


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding
us-gaap:StatementEquityComponents

us-gaap:CommonStockSharesAuthorized

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ContractWithCustomerBasisOfPricing
us-gaap:ContractWithCustomerBasisOfPricing, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical
us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

us-gaap:Revenues

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization
us-gaap:ConsolidationItems
us-gaap:OperatingExpenses

us-gaap:SellingGeneralAndAdministrativeExpense

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

us-gaap:InterestExpense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense

us-gaap:IncomeTaxExpenseBenefit

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:ShortTermInvestments

us-gaap:AccountsReceivableNetCurrent

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical

us-gaap:LongTermInvestments

us-gaap:Goodwill
us-gaap:BusinessAcquisition

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:OtherAssetsNoncurrent

us-gaap:LiabilitiesCurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:OtherLiabilitiesCurrent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongTermDebt

us-gaap:LongTermDebtNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:DepreciationDepletionAndAmortization

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensation

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

ctsh:CapitalizedContractCostCostsCapitalized

ctsh:ContractWithCustomerAssetRevenueRecognizedButNotBilled

ctsh:ContractWithCustomerLiabilityAmountBilledButRevenueNotRecognized

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:CapitalizedContractCostAmortization

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:ContractWithCustomerAssetReclassifiedToReceivable

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

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationAndAmortization
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInDeferredRevenue

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:InvestmentIncomeInterestAndDividend
us-gaap:StatementEquityComponents
us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentsToAcquireAvailableForSaleSecurities

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireHeldToMaturitySecurities

us-gaap:PaymentsToAcquireOtherInvestments

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities

us-gaap:ProceedsFromSaleAndMaturityOfOtherInvestments
us-gaap:IncomeStatementLocation, us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent
us-gaap:IncomeStatementLocation, us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
us-gaap:IncomeStatementLocation, us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:RepaymentsOfDebtAndCapitalLeaseObligations
us-gaap:IncomeStatementLocation
us-gaap:RestructuringAndRelatedCostIncurredCost
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan

us-gaap:RestructuringCharges
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

ctsh:AccruedTravelAndEntertainmentCurrent

ctsh:CustomerVolumeandOtherIncentivesCurrent

ctsh:DebtSecuritiesTimeDeposits
us-gaap:BalanceSheetLocation
ctsh:EquityandCostMethodInvestments
us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName
ctsh:RestrictedInvestmentsInitiallyDeposited
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
ctsh:TimeDepositsFairValueDisclosure
us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementFrequency

us-gaap:AccruedIncomeTaxesNoncurrent

us-gaap:AccruedLiabilitiesAndOtherLiabilities

us-gaap:AccruedProfessionalFeesCurrent
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
us-gaap:StatementEquityComponents
us-gaap:AociBeforeTaxAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:AociTaxAttributableToParent
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:BusinessCombinationContingentConsiderationLiability
us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementFrequency

us-gaap:CapitalizedContractCostNet
us-gaap:BalanceSheetLocation, us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:BalanceSheetLocation, us-gaap:CashAndCashEquivalents, us-gaap:FairValueByMeasurementFrequency

us-gaap:ContractWithCustomerAssetGross

us-gaap:ContractWithCustomerLiability

us-gaap:CostMethodInvestments

us-gaap:CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
us-gaap:StatementEquityComponents

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredRevenueCurrent

us-gaap:DeferredRevenueNoncurrent
us-gaap:BalanceSheetLocation, us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName
us-gaap:DepositsAssets
us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName

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

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

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

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EquityMethodInvestments
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:ForeignCurrencyContractAssetFairValueDisclosure
us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementFrequency
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:ForeignCurrencyContractsLiabilityFairValueDisclosure
us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAtFairValueNet

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, ctsh:CreditRatingCRISIL
us-gaap:HeldToMaturitySecuritiesCurrent
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:InvestmentType
us-gaap:FinancialInstrument, us-gaap:InvestmentType
us-gaap:HeldToMaturitySecuritiesFairValue
us-gaap:InvestmentType
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCredit

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityNoncurrent
us-gaap:BalanceSheetLocation
us-gaap:RestrictedInvestments
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementFrequency
us-gaap:RestructuringCostAndReserve
us-gaap:RestructuringReserveCurrent
us-gaap:SubsequentEventType
us-gaap:StockRepurchaseProgramAuthorizedAmount1

us-gaap:TradingSecuritiesEquity
us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementFrequency

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:CommonStockValue ▆▆███████████████████████▃▃▃▃▃▁▁▃▃▃▃▃▃55666666666666666666666663333322333333NANANA2NANANA
us-gaap:CommonStockSharesIssued ▆▇▇▇▇▇▇▇▇████████████████▁▁▁▁▁▁▁▁▁▁▁▁▁541548550552569577580580586588590590607608606607606609608609610609608607608303302301302301299299304303302303304303NANANA297NANANA
us-gaap:CommonStockSharesOutstanding ▆▇▇▇▇▇▇▇▇████████████████▁▁▁▁▁▁▁▁▁▁▁▁▁541548550552569577580580586588590590607608606607606609608609610609608607608303302301302301299299304303302303304303NANANA297NANANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock▁▂▂▂▄▅▅▅▆▆▆▆▆█541548550552569577580580586588590590589608NANANA609NANANA609NANANA303NANANA301NANANA303NANANA303NANANA297NANANA
us-gaap:CommonStockSharesAuthorized ████████████████████████████████████▁▁100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000500500NANANA500NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 546NA551564575NA580586589NA592591607NA608608611NA612613613NA612612612305304304305NA303307309NA309311311NA309308306NANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 546NA551564573NA579585587NA590589605NA606606608NA608609609NA608607607302301301301NA299302303NA302303304NA301299297NANANANA
us-gaap:EarningsPerShareBasic ▅▆▇▇▆█▆▆▇▁▆▆▇▅▆▄▆▅▅▅▅▅▅▅▅██▇▇▇▇▆▆▆▆▅▅▅▅▅▄▄▄▄▄0.670.720.90.90.771.120.820.780.89-0.030.840.80.920.690.730.420.730.70.650.690.630.60.580.610.571.071.061.00.940.930.930.830.80.790.750.680.690.680.680.570.510.490.470.480.39
us-gaap:EarningsPerShareDiluted ▅▆▇▇▆█▆▆▇▁▆▆▇▅▆▄▆▅▅▅▅▅▅▅▅██▇▇▇▇▆▆▆▆▅▅▅▅▅▄▄▄▄▃0.670.720.90.90.771.120.820.780.88-0.030.840.80.920.680.730.410.720.690.650.680.620.590.580.610.571.061.050.990.930.920.910.820.790.780.730.670.670.660.660.560.490.470.450.470.38
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ███████▇▇▇▇▇▇▆▆▆▆▆▆▆▅▅▅▅▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁4225428442484141411041294078400639123828376636703546346234533369320232323187308529112742258125172422235523052161202019481891179517111663160014851371131012161105959902853776745
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing ctsh:TransactionOrVolumeBased██▇█▇▆▅▅▁520524504519490471448438332NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing us-gaap:FixedPriceContract▆█▅▂▂▄▃▁▄155415981544148014681511148414491522NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing us-gaap:TimeAndMaterialsContract▆▆█▅▆▅▅▄▁215121622200214221522147214621192058NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing,us-gaap:StatementBusinessSegments us-gaap:FixedPriceContract,ctsh:FinancialServices▅█▅▅▃▄▁▂▄483500481477464475453460471NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing,us-gaap:StatementBusinessSegments us-gaap:FixedPriceContract,ctsh:ProductsandResources▇█▇▆▅▄▃▁▁443451441424414401392367361NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing,us-gaap:StatementBusinessSegments us-gaap:TimeAndMaterialsContract,ctsh:FinancialServices▁▁▅▅▄▅██▆884887925920919920954953935NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing,us-gaap:StatementBusinessSegments us-gaap:TimeAndMaterialsContract,ctsh:HealthcareSegment██▇▁▄▇▆▃▂475473472442458472464452448NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService ctsh:ConsultingAndTechnologyServices██▇▅▄▄▃▁▁254725662530244124092404235122862268NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService ctsh:OutsourcingServices▄▇▇▆▆██▇▁167817181718170017011725172717201644NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments ctsh:ConsultingAndTechnologyServices,ctsh:FinancialServices▆▆█▆▄▄▃▂▁947950972947913913902885871NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments ctsh:ConsultingAndTechnologyServices,ctsh:HealthcareSegment▆█▃▁▄▆▄▁▄662679634613638657645613638NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments ctsh:ConsultingAndTechnologyServices,ctsh:ProductsandResources███▆▅▄▃▂▁590590592561552532512499481NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments ctsh:OutsourcingServices,ctsh:FinancialServices▁▂▂▃▃▄▆██504518520526523538562584590NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService,us-gaap:StatementBusinessSegments ctsh:OutsourcingServices,ctsh:HealthcareSegment▇██▅▆███▁532542541521527545544543483NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments ctsh:CommunicationMediaandTechnology██▇▇▆▅▄▃▁626632615607595585562541509NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments ctsh:FinancialServices▃▅█▆▁▃▄▅▄145114681492147314361451146414691461NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments ctsh:HealthcareSegment▆█▅▂▄▇▆▃▁119412211175113411651202118911561121NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments ctsh:ProductsandResources▇██▆▅▄▃▂▁954963966927914891863840821NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical ctsh:EuropeexcludingUnitedKingdom████▇▇▇▆▆▅▅▄▄▃▃▂▂▂▂▁▁437429430427405410398381374345327291285261244236226215209204190NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical srt:Europe█▇▇▆▅▅▄▁▁774766755749734740723690684NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical srt:NorthAmerica▇██▅▅▅▄▃▁319032413223313931233144310730672975NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments srt:NorthAmerica,ctsh:CommunicationMediaandTechnology███▇▆▅▄▃▁451454448440422397381366336NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments srt:NorthAmerica,ctsh:FinancialServices▁▄▇▅▂▄▄█▆101210321052103510181029103310561044NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments srt:NorthAmerica,ctsh:HealthcareSegment▄▆▄▁▄██▆▂103810631036100610421087108410601023NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical,us-gaap:StatementBusinessSegments srt:NorthAmerica,ctsh:ProductsandResources███▆▅▄▃▂▁689692687658641631609585572NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Revenues ███████▇▇▇▇▇▇▆▆▆▆▆▆▆▅▅▅▅▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁4225428442484141411041294078400639123828376636703546346234533369320232323187308529112742258125172422235523052161202019481891179517111663160014851371131012161105959902853776745
us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization ██▇▆▄▄▃▁▁274727492681262925752540248024172401NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingExpenses us-gaap:ConsolidationItems us-gaap:CorporateNonSegment574NA521541606NA534586507NA522508418NA495498505NA542516365NA326374373NANANANANANANANANANANANANANANANANANANANA
us-gaap:SellingGeneralAndAdministrativeExpense ▆▆▇▇█▇▇▇▆▆▆▆▆▇▆▆▆▆▆▅▅▅▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▁▁▁▁▁711676771768873776734805711700674709686730700653646658627612610562506482485450443420413401384396374352353326296279262234194190193170166
us-gaap:OperatingIncomeLoss ▆▇▇▇▆▇█▇▇▇▇▆▆▆▆▆▆▆▆▆▅▅▅▅▅▅▄▄▄▄▄▃▃▃▃▃▂▂▂▂▂▁▁▁▁579626669619539693745670693657648606570561583590554553542545500479457487460447437426365356355331317308293269265244228205183166161151138
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems us-gaap:OperatingSegments1153NA119011601145NA127912561200NA11701114988NA107910891059NA10851061865NA784862833NA818749644NANANANANANANANANANANANANANANANA
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctsh:CommunicationsMediaandTechnology███▇▇▇▇▇▅▄▄▄▂▁▁▃▂190188186184174178184179159151147146121114118134122NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctsh:FinancialServices▄▄▆▆▅▅▇█▇▅▇▆▅▅▇█▆▇▇▆▃▁▂▃▃381380418407400402446462447390444411391391433459423444430420347300318354347NA324305265NANANANANANANANANANANANANANANANA
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ctsh:ProductsandResources▇▇█▆▅▇▇▇▆▃▄▃▂▁▃▄▃261265274255234262267258256219232214203192214226219NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:HealthCare321NA312314337NA374352337NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestExpense ▆▆▇▆▇█▆▇▆▅▆▆▆▄▄▄▅▄▄▄▅▃▁▁▁6676786765666444544452000NANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▁█▄█▆▄▁▄▄▃▁▃▆▄▄▄▄▃▄▄▄▁▄▄▄-220210-200-1-2-110000-1000-2000NA-8-19-1NA-3-6-6NA-15-16NA7-4-10NANANANA
us-gaap:NonoperatingIncomeExpense ▁▄▃▆▅█▁▂▄▆▄▅▇▄▅▄▅▄▄▄▄▄▄▄▄-690-115744122-83-4745610297902933570310561313NA1-611NA834NA-5715NA142-4NANANANA
us-gaap:IncomeTaxExpenseBenefit ▂▂▂▂▂▂▂▂▂█▂▂▁▂▂▄▂▁▂▁▁▁▁▁▁14217416016714216818516817773216416592145168342147137145128127122108129124NA11911992NA878378NA606972NA393527NANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▂▆▅▆▆█▅▄▆▁▆▆▇▄▆▃▆▅▅▅▅▄▄▅▅1415164085134817223832995148506520654357483218485430374448386363343427457NA269184315NA48348375NA99244212NA250107175NANANANA
us-gaap:NetIncomeLoss ▅▅▆▇▆█▆▆▇▁▆▆▇▆▆▄▆▆▅▆▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▂367395497509441648477456520-18495470557416444252441423397420382362355371348324319300284278276251243240227208208206203172151144136141113
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings367NANANA441NANA456520-18495470557NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:Assets █▇▇▇▇▇▇▇▇▇▆▆▆▆▆▆▅▆▅▅▅▅▄▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁174291620415844155171609615913152741480615045152211458013938136291426213716131401273513065122671179711383117189227868782798208761770126709652161075654566855075104491646374583NANANA3338NANANA
us-gaap:Liabilities █▆▆▆▆▅▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄▅▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁68165182514249604960448942964158405745523601345536463534342432773123378734403256320439781845169616562073196816881493166715341561130015551164964873998NANANA685NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▇▇▇▇▇▇▇▆▆▆▆▆▆▅▆▅▅▅▅▄▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁174291620415844155171609615913152741480615045152211458013938136291426213716131401273513065122671179711383117189227868782798208761770126709652161075654566855075104491646374583NANANA3338NANANA
us-gaap:StockholdersEquity ▇█▇▇███▇█▇█▇▇▇▇▇▆▆▆▅▅▅▄▄▄▃▃▃▂▂▂▁▂▁▁▁▁▁1061311022107021055711136114241097810648109881066910979104839983107281029298629612927888278540817877407381699066226135564853235215485445724092436739523939395137643584NANANA2653NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▅▆▅▄▆█▆▄▅▄▅▃▁▃108311102210820105831114011485110411068110856105441072110316993510478NANANA8925NANANA7301NANANA5862NANANA4633NANANA3582NANANA2698NANANA1965NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:AssetsCurrent ▇▆▆▆▆▇█▇██▇▇▆▇▇▆▆▆▆▅▅▅▆▅▄▄▄▃▃▃▂▂▂▂▁▁▁▁83257611739172067883867787278303899091118557809978428600819977587570790872376771640667507260674062906147573951334836481445414152419640853812375735353518NANANA2307NANANA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▅▄▃▁▂▂▁▂▃▃▂▂▄▃▃▂▄▂▁▂▄▅▄▃▄▄▃▂▃▂▁▂▂▂▂▂▂▂▁▁▁3886264523431660950116113399011440192515771157130820341550168415232125147610891271201026171992193522132031167814741570132410501328131011811193129315401317103910801100NANANA
us-gaap:ShortTermInvestments ▁▂▂▃▆████▇▇█▇▇█▇▇▇▆▆▅▄▅▅▅▄▃▃▃▃▃▃▃▃▃▃▂▂396779734134327183350342433463390313131363221296631353308279629272824257424772078176420002136192815341329122212691293130712951162112111101076874685NANANA298NANANA
us-gaap:AccountsReceivableNetCurrent ▇▇████▇▇▇▆▆▆▆▆▅▅▅▅▄▄▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▁▁▁322032563438338633773257318732043145286528892680264425562492242723192252213521622059196818091822170316481637156014951345136312961234117911041075994901NANANA626NANANA
us-gaap:OtherAssetsCurrent ▇██▇▇█▇▇▇▇▅▅▄▄▃▃▃▃▂▃▃▃▂▂▂▂▂▂▂▂▁▁▁▂▁▁▁▁823931876817838909777852856833552632529526425399367337264322336352234257254268218220206219166198189225144180176181NANANA125NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:PropertyPlantAndEquipmentNet ▇▇▇█▇███▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▅▅▅▅▅▅▄▄▃▃▃▂▁▁▁13221309131813371314139413621345133313241304128413061311132312871270127112781277126812471101108610901081101110171008971878837784758664614601570NANANA481NANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical ctsh:RestofWorld█▁776760NANANA853NANANA901NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical srt:NorthAmerica▆▆▇█▁▄446445451454420436NANANA360NANANA279NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermInvestments █▁▂▂▂▂▂▂▂▅▅▄▃▂433177980798093808323526219811062NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Goodwill ██▇▇▇▇▆▆▆▆▅▅▅▅▅▅▅▅▅▅▅▅▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁4014397936943651363834813037303627132704260825762563255424822457246124042403240524032413437449445444417412407309301289289288289224224223NANANA192NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▇▇████▇▇▇▇▇▆▆▆▆▇▆▆▆▆▆▆▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁100510411192116111851150102110609559819578949239519369618628648819069289531091201241311181211228787869397102878185NANANA75NANANA
us-gaap:OtherAssetsNoncurrent █▇██▇▇▆▆▆▅▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▁▂▁▁▁▁▁8097367737677246896436155774484284304273593282862752682622772232091751661871831691601691601431201391131001198275NANANA49NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:LiabilitiesCurrent ███▇▇▇▇▇▆█▇▆▇▆▆▅▅▇▅▅▄▇▄▃▃▄▄▃▂▃▃▂▂▂▂▁▁▁28722983291928242720277726932537246928392600241525852418230021202050271321281956188425921741156715021774160213571225137712751151102112091040887801930NANANA646NANANA
us-gaap:AccountsPayableCurrent █▆▇▇▇▆▆▆█▅▅▄▅▄▄▄▅▄▄▄▄▃▃▂▄▂▂▂▃▂▂▂▂▁▁▂▂▁2892392462542622152232172932101861791891751711642131651601691811451301191761131149413210811110410972788911775NANANA54NANANA
us-gaap:AccruedIncomeTaxesCurrent █▆▅▅▅▇▇▇▃▂▁▁▁▁▁▂1971521111081301621581747448231512101434NA17NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ████▇█▇▇▇▇▆▅▆▆▆▅▃▄▃▃▄▄▃▃▃▂▂▂▂▂▂▂▁▂▂▁▁▁38438036636335936932932233332527526229631527523917718217417617918415714713812110810592918988818894676478NANANA66NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType ctsh:CreditAgreement,us-gaap:LoansPayable▁█731741NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent █▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂2430700709718727736624649673698723747772797821840858881900912925937NANANA0NANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▄▄▃▃▃▅▅▅▄▃▃▃▃▃▃▃▃▃▂▂▂▂▁▂▂▅▇▆▅▆▅█▅▇▂▁▁▁22921818116115025326024219918115915515516214013813813912910311111685108133277352316252287254407276342120736862NANANA38NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:StockholdersEquity ▇█▇▇███▇█▇█▇▇▇▇▇▆▆▆▅▅▅▄▄▄▃▃▃▂▂▂▁▂▁▁▁▁▁1061311022107021055711136114241097810648109881066910979104839983107281029298629612927888278540817877407381699066226135564853235215485445724092436739523939395137643584NANANA2653NANANA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▅▆▅▄▆█▆▄▅▄▅▃▁▃108311102210820105831114011485110411068110856105441072110316993510478NANANA8925NANANA7301NANANA5862NANANA4633NANANA3582NANANA2698NANANA1965NANANA
us-gaap:CommonStockValue ▆▆███████████████████████▃▃▃▃▃▁▁▃▃▃▃▃▃55666666666666666666666663333322333333NANANA2NANANA
us-gaap:AdditionalPaidInCapital ▁▁▁▁▁▁▂▁▁▁▃▂▁▄▃▄▃▅▄▅▆▅▆▅▆▅▅▄▅▅▄▄▇▇▆▇██41333538644711955634920812859358279333301453432520607555560513572546482426503457404407731692644756813846NANANA664NANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▇█▇▇███▇▇▇▇▇▇▇▇▇▆▆▆▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▂▁▁▁1083111022108201058311140114851104110681108561054410721103169935104781006396189366892585018104768473016938658362115862553852184917463343554078382635823342311529072698NANANA1965NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▃▆▅▆▆▅▄▅███▇▇▅▆▅▆▅▅▆▅▅▅▅▄▃▁▂▄▃▄▁▄▂▆█▇▇-264-38-159-70-74-114-188-9463704433-17-114-56-95-61-106-113-90-119-123-123-111-167-276-375-324-208-239-190-396-193-325-50763935NANANA20NANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄█▆▅▃▆▇▆▄▇▇▅▃▅▅▃▁▆▇▄▂▃▅▄▂49793871757526970286264038883677352127759859435968690817456189324583408157NANANA73NANANA101NANANA45NANANA2NANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅▅▆█▆▅▅▅▅▅▅▅▆▆▅▆▅▅▅▅▅▁▆▅▅-272-3753401267356-550-266-584-227-160-124-38991-90-612-31-228-340-176-489-364-253464-257-433NANANA-185NANANA-95NANANA-252NANANA-57NANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇▃▃▁▂▃▄▂▃▃▃▃▁▄▄▄▃▅▃▄▂█▄▄▄1135-253-340-1137-839-325-146-734-488-333-231-297-112410-118-143-467306-248-149-5571611-8-93-6NANANA16NANANA7NANANA-49NANANA43NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄█▆▅▃▆▇▆▄▇▇▅▃▅▅▃▁▆▇▄▂▃▅▄▂49793871757526970286264038883677352127759859435968690817456189324583408157NANANA73NANANA101NANANA45NANANA2NANANANA
us-gaap:NetIncomeLoss ▅▅▆▇▆█▆▆▇▁▆▆▇▆▆▄▆▆▅▆▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▂367395497509441648477456520-18495470557416444252441423397420382362355371348324319300284278276251243240227208208206203172151144136141113
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings367NANANA441NANA456520-18495470557NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization ██▇███▇▇▇▇▆▅▆▅▅▅▄▄▄▄▃▂▁▁▁1361331271331331311271231171221141031041009792878882847562494846NANANA43NANANA36NANANA28NANANA27NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅▅▆█▆▅▅▅▅▅▅▅▆▆▅▆▅▅▅▅▅▁▆▅▅-272-3753401267356-550-266-584-227-160-124-38991-90-612-31-228-340-176-489-364-253464-257-433NANANA-185NANANA-95NANANA-252NANANA-57NANANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment █▆▇▆▇▆▆▆▆▅▅▃▄▆▄▄▃▄▄▄▃▄▃▁▁1129397961069694919680786066877474637465755874553843NANANA72NANANA60NANANA55NANANA24NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇▃▃▁▂▃▄▂▃▃▃▃▁▄▄▄▃▅▃▄▂█▄▄▄1135-253-340-1137-839-325-146-734-488-333-231-297-112410-118-143-467306-248-149-5571611-8-93-6NANANA16NANANA7NANANA-49NANANA43NANANANA
us-gaap:PaymentsOfDividendsCommonStock █▇▇██████▆▆▆▁▁▁121110111116116116116118118869089000NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▃▂▂▆▅▂▁▄▂▃▁▁█▁▂▁▂▁▂▂▁▁▁▂▁511163259105477126745633316332133015141915777257761691753877912239NANANA22NANANA48NANANA88NANANA2NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value556666666666666666666666633333223333332
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.00.00.00.00.00.00.10.10.10.10.10.10.10.1

Common Stock Par Or Stated Value Per Share

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value541548550552569577580580586588590590607608606607606609608609610609608607608303302301302301299299304303302303304303297
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value541548550552569577580580586588590590607608606607606609608609610609608607608303302301302301299299304303302303304303297
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value541548550552569577580580586588590590589608609609303301303303297291288
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.097.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000100010001000500500500
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value546551564575580586589592591607608608611612613613612612612305304304305303307309309311311309308306
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value546551564573579585587590589605606606608608609609608607607302301301301299302303302303304301299297
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value0.670.720.90.90.771.120.820.780.89-0.030.840.80.920.690.730.420.730.70.650.690.630.60.580.610.571.071.061.00.940.930.930.830.80.790.750.680.690.680.680.570.510.490.470.480.39
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value0.670.720.90.90.771.120.820.780.88-0.030.840.80.920.680.730.410.720.690.650.680.620.590.580.610.571.061.050.990.930.920.910.820.790.780.730.670.670.660.660.560.490.470.450.470.38
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value4225428442484141411041294078400639123828376636703546346234533369320232323187308529112742258125172422235523052161202019481891179517111663160014851371131012161105959902853776745
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerBasisOfPricing

ctsh:TransactionOrVolumeBased



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value520524504519490471448438332
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.312.211.912.511.911.411.010.98.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.312.211.912.511.911.411.010.98.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:TransactionOrVolumeBased100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FixedPriceContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value155415981544148014681511148414491522
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.837.336.335.735.736.636.436.238.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax36.837.336.335.735.736.636.436.238.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FixedPriceContract100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TimeAndMaterialsContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value215121622200214221522147214621192058
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.950.551.851.752.452.052.652.952.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax50.950.551.851.752.452.052.652.952.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimeAndMaterialsContract100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerBasisOfPricing, us-gaap:StatementBusinessSegments

ctsh:TransactionOrVolumeBased, ctsh:CommunicationMediaandTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value242631313025212724
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.60.70.70.70.60.50.70.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.60.70.70.70.60.50.70.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:TransactionOrVolumeBased ctsh:CommunicationMediaandTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:TransactionOrVolumeBased, ctsh:FinancialServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value848186765356575655
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.01.92.01.81.31.41.41.41.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.01.92.01.81.31.41.41.41.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:TransactionOrVolumeBased ctsh:FinancialServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:TransactionOrVolumeBased, ctsh:HealthcareSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value310315283310307284273261162
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.37.46.77.57.56.96.76.54.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.37.46.77.57.56.96.76.54.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:TransactionOrVolumeBased ctsh:HealthcareSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:TransactionOrVolumeBased, ctsh:ProductsandResources



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value102102104102100106979491
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.42.42.42.52.42.62.42.32.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.42.42.42.52.42.62.42.32.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:TransactionOrVolumeBased ctsh:ProductsandResources100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FixedPriceContract, ctsh:CommunicationMediaandTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value219214202197190189187179179
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.25.04.84.84.64.64.64.54.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.25.04.84.84.64.64.64.54.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FixedPriceContract ctsh:CommunicationMediaandTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FixedPriceContract, ctsh:FinancialServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value483500481477464475453460471
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.411.711.311.511.311.511.111.512.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.411.711.311.511.311.511.111.512.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FixedPriceContract ctsh:FinancialServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FixedPriceContract, ctsh:HealthcareSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value409433420382400446452443511
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.710.19.99.29.710.811.111.113.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.710.19.99.29.710.811.111.113.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FixedPriceContract ctsh:HealthcareSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FixedPriceContract, ctsh:ProductsandResources



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value443451441424414401392367361
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.510.510.410.210.19.79.69.29.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.510.510.410.210.19.79.69.29.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:FixedPriceContract ctsh:ProductsandResources100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TimeAndMaterialsContract, ctsh:CommunicationMediaandTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value383392382379375371354335306
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.19.29.09.29.19.08.78.47.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.19.29.09.29.19.08.78.47.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimeAndMaterialsContract ctsh:CommunicationMediaandTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TimeAndMaterialsContract, ctsh:FinancialServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value884887925920919920954953935
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.920.721.822.222.422.323.423.823.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.920.721.822.222.422.323.423.823.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimeAndMaterialsContract ctsh:FinancialServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TimeAndMaterialsContract, ctsh:HealthcareSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value475473472442458472464452448
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.211.011.110.711.111.411.411.311.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.211.011.110.711.111.411.411.311.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimeAndMaterialsContract ctsh:HealthcareSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TimeAndMaterialsContract, ctsh:ProductsandResources



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value409410421401400384374379369
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.79.69.99.79.79.39.29.59.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.79.69.99.79.79.39.29.59.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimeAndMaterialsContract ctsh:ProductsandResources100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService

ctsh:ConsultingAndTechnologyServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value254725662530244124092404235122862268
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.359.959.658.958.658.257.757.158.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.359.959.658.958.658.257.757.158.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:ConsultingAndTechnologyServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:OutsourcingServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value167817181718170017011725172717201644
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.740.140.441.141.441.842.342.942.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.740.140.441.141.441.842.342.942.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:OutsourcingServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

ctsh:ConsultingAndTechnologyServices, ctsh:CommunicationMediaandTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value348347332320306302292289278
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.28.17.87.77.47.37.27.27.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.28.17.87.77.47.37.27.27.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:ConsultingAndTechnologyServices ctsh:CommunicationMediaandTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:ConsultingAndTechnologyServices, ctsh:FinancialServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value947950972947913913902885871
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.422.222.922.922.222.122.122.122.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.422.222.922.922.222.122.122.122.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:ConsultingAndTechnologyServices ctsh:FinancialServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:ConsultingAndTechnologyServices, ctsh:HealthcareSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value662679634613638657645613638
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.715.814.914.815.515.915.815.316.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.715.814.914.815.515.915.815.316.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:ConsultingAndTechnologyServices ctsh:HealthcareSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:ConsultingAndTechnologyServices, ctsh:ProductsandResources



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value590590592561552532512499481
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.013.813.913.513.412.912.612.512.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.013.813.913.513.412.912.612.512.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:ConsultingAndTechnologyServices ctsh:ProductsandResources100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:OutsourcingServices, ctsh:CommunicationMediaandTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value278285283287289283270252231
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.66.76.76.97.06.96.66.35.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.66.76.76.97.06.96.66.35.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:OutsourcingServices ctsh:CommunicationMediaandTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:OutsourcingServices, ctsh:FinancialServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value504518520526523538562584590
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.912.112.212.712.713.013.814.615.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.912.112.212.712.713.013.814.615.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:OutsourcingServices ctsh:FinancialServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:OutsourcingServices, ctsh:HealthcareSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value532542541521527545544543483
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.612.712.712.612.813.213.313.612.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.612.712.712.612.813.213.313.612.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:OutsourcingServices ctsh:HealthcareSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:OutsourcingServices, ctsh:ProductsandResources



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value364373374366362359351341340
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.68.78.88.88.88.78.68.58.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.68.78.88.88.88.78.68.58.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:OutsourcingServices ctsh:ProductsandResources100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

ctsh:CommunicationMediaandTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value626632615607595585562541509
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.814.814.514.714.514.213.813.513.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.814.814.514.714.514.213.813.513.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:CommunicationMediaandTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:FinancialServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value145114681492147314361451146414691461
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.334.335.135.634.935.135.936.737.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax34.334.335.135.634.935.135.936.737.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:FinancialServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:HealthcareSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value119412211175113411651202118911561121
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.328.527.727.428.329.129.228.928.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.328.527.727.428.329.129.228.928.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:HealthcareSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:ProductsandResources



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value954963966927914891863840821
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.622.522.722.422.221.621.221.021.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.622.522.722.422.221.621.221.021.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:ProductsandResources100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementGeographical

country:GB



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value337337325322329330325309310287301288274273293310298305299297285278276266277245246233216
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.07.97.77.88.08.08.07.77.97.58.07.87.77.98.59.29.39.59.49.69.810.210.710.611.510.410.710.810.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.07.97.77.88.08.08.07.77.97.58.07.87.77.98.59.29.39.59.49.69.810.210.710.611.510.410.710.810.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:GB100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:EuropeexcludingUnitedKingdom



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value437429430427405410398381374345327291285261244236226215209204190
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.310.010.110.39.99.99.89.59.69.08.77.98.07.57.17.07.16.76.66.66.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.310.010.110.39.99.99.89.59.69.08.77.98.07.57.17.07.16.76.66.66.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:EuropeexcludingUnitedKingdom100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:RestofWorld



Period End2020-03-312019-03-31
Value261253
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.26.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.26.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:RestofWorld100.0100.0

srt:Europe



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value774766755749734740723690684
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.317.917.818.117.917.917.717.217.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.317.917.818.117.917.917.717.217.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:Europe100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:NorthAmerica



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value319032413223313931233144310730672975
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax75.575.775.975.876.076.176.276.676.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax75.575.775.975.876.076.176.276.676.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NorthAmerica100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementGeographical, us-gaap:StatementBusinessSegments

country:GB, ctsh:CommunicationMediaandTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value848477778191858484
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.02.01.81.92.02.22.12.12.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.02.01.81.92.02.22.12.12.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:GB ctsh:CommunicationMediaandTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:GB, ctsh:FinancialServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value120119117119129124127114116
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.82.82.82.93.13.03.12.83.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.82.82.82.93.13.03.12.83.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:GB ctsh:FinancialServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:GB, ctsh:HealthcareSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value404036292523232223
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.90.80.70.60.60.60.50.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.90.90.80.70.60.60.60.50.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:GB ctsh:HealthcareSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:GB, ctsh:ProductsandResources



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value939495979492908987
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.22.22.22.32.32.22.22.22.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.22.22.22.32.32.22.22.22.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:GB ctsh:ProductsandResources100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:EuropeexcludingUnitedKingdom, ctsh:CommunicationMediaandTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value384238434649504642
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.91.00.91.01.11.21.21.11.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.91.00.91.01.11.21.21.11.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:EuropeexcludingUnitedKingdom ctsh:CommunicationMediaandTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:EuropeexcludingUnitedKingdom, ctsh:FinancialServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value191180192194162169170165162
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.54.24.54.73.94.14.24.14.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.54.24.54.73.94.14.24.14.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:EuropeexcludingUnitedKingdom ctsh:FinancialServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:EuropeexcludingUnitedKingdom, ctsh:HealthcareSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value999485808279696161
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.22.01.92.01.91.71.51.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.22.01.92.01.91.71.51.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:EuropeexcludingUnitedKingdom ctsh:HealthcareSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:EuropeexcludingUnitedKingdom, ctsh:ProductsandResources



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value109113115110115113109109109
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.62.72.72.82.72.72.72.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.62.62.72.72.82.72.72.72.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:EuropeexcludingUnitedKingdom ctsh:ProductsandResources100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:RestofWorld, ctsh:CommunicationMediaandTechnology



Period End2020-03-312019-03-31
Value5346
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.31.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.31.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:RestofWorld ctsh:CommunicationMediaandTechnology100.0100.0

ctsh:RestofWorld, ctsh:FinancialServices



Period End2020-03-312019-03-31
Value128127
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.03.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.03.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:RestofWorld ctsh:FinancialServices100.0100.0

ctsh:RestofWorld, ctsh:HealthcareSegment



Period End2020-03-312019-03-31
Value1716
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:RestofWorld ctsh:HealthcareSegment100.0100.0

ctsh:RestofWorld, ctsh:ProductsandResources



Period End2020-03-312019-03-31
Value6364
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ctsh:RestofWorld ctsh:ProductsandResources100.0100.0

srt:Europe, ctsh:CommunicationMediaandTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value122126115120127140135130126
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.92.92.72.93.13.43.33.23.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.92.92.72.93.13.43.33.23.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:Europe ctsh:CommunicationMediaandTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Europe, ctsh:FinancialServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value311299309313291293297279278
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.47.07.37.67.17.17.37.07.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.47.07.37.67.17.17.37.07.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:Europe ctsh:FinancialServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Europe, ctsh:HealthcareSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value139134121109107102928384
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.33.12.82.62.62.52.32.12.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.33.12.82.62.62.52.32.12.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:Europe ctsh:HealthcareSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Europe, ctsh:ProductsandResources



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value202207210207209205199198196
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.84.84.95.05.15.04.94.95.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.84.84.95.05.15.04.94.95.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:Europe ctsh:ProductsandResources100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:NorthAmerica, ctsh:CommunicationMediaandTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value451454448440422397381366336
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.710.610.510.610.39.69.39.18.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.710.610.510.610.39.69.39.18.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NorthAmerica ctsh:CommunicationMediaandTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:NorthAmerica, ctsh:FinancialServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value101210321052103510181029103310561044
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.024.124.825.024.824.925.326.426.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.024.124.825.024.824.925.326.426.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NorthAmerica ctsh:FinancialServices100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:NorthAmerica, ctsh:HealthcareSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value103810631036100610421087108410601023
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.624.824.424.325.426.326.626.526.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax24.624.824.424.325.426.326.626.526.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NorthAmerica ctsh:HealthcareSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:NorthAmerica, ctsh:ProductsandResources



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value689692687658641631609585572
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.316.216.215.915.615.314.914.614.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.316.216.215.915.615.314.914.614.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:NorthAmerica ctsh:ProductsandResources100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value4225428442484141411041294078400639123828376636703546346234533369320232323187308529112742258125172422235523052161202019481891179517111663160014851371131012161105959902853776745
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Sales Revenue Net

Cost Of Goods And Service Excluding Depreciation Depletion And Amortization

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value274727492681262925752540248024172401
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax65.064.263.163.562.761.560.860.361.4

Cost Of Services Excluding Depreciation Depletion And Amortization

Operating Expenses

us-gaap:ConsolidationItems

us-gaap:OperatingExpenses

us-gaap:CorporateNonSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value574521541606534586507522508418495498505542516365326374373
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.612.313.114.713.114.613.013.913.811.814.414.815.817.016.712.612.714.915.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value711676771768873776734805711700674709686730700653646658627612610562506482485450443420413401384396374352353326296279262234194190193170166
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.815.818.118.521.218.818.020.118.218.317.919.319.321.120.319.420.220.419.719.821.020.519.619.220.019.119.219.520.420.620.322.121.921.222.122.021.621.421.621.220.321.122.721.922.4

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value579626669619539693745670693657648606570561583590554553542545500479457487460447437426365356355331317308293269265244228205183166161151138
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.714.615.714.913.116.818.316.717.717.217.216.516.116.216.917.517.317.117.017.717.217.517.719.419.019.019.019.718.118.318.818.518.618.518.318.219.418.718.818.619.118.519.019.518.5

us-gaap:ConsolidationItems

us-gaap:OperatingSegments



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value11531190116011451279125612001170111498810791089105910851061865784862833818749644
Percentage of OperatingIncomeLoss199.1177.9187.4212.4171.7187.5173.2180.6183.8173.3185.0184.3191.2200.0194.6173.1171.4176.8181.2187.2175.6176.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.328.028.027.931.431.430.731.130.427.931.332.333.134.134.429.730.434.334.435.534.731.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ctsh:CommunicationsMediaandTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value190188186184174178184179159151147146121114118134122
Percentage of OperatingIncomeLoss32.830.027.829.732.325.724.726.722.923.022.724.121.220.320.222.722.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.54.44.44.44.24.34.54.54.13.93.94.03.43.33.44.03.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctsh:CommunicationsMediaandTechnology0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctsh:FinancialServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value381380418407400402446462447390444411391391433459423444430420347300318354347324305265
Percentage of OperatingIncomeLoss65.860.762.565.874.258.059.969.064.559.468.567.868.669.874.277.776.480.379.277.069.462.669.572.675.674.271.672.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.08.99.89.89.79.710.911.511.410.211.811.211.011.312.513.613.213.813.513.611.910.912.314.114.414.114.113.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctsh:FinancialServices0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ctsh:ProductsandResources



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value261265274255234262267258256219232214203192214226219
Percentage of OperatingIncomeLoss45.142.341.041.243.437.835.838.536.933.335.835.335.634.236.738.239.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.26.26.56.25.76.36.56.46.55.76.25.85.75.56.26.76.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ctsh:ProductsandResources0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, us-gaap:HealthCare



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value321312314337374352337
Percentage of OperatingIncomeLoss55.446.650.762.550.252.548.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.67.37.68.29.28.88.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:HealthCare0.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value6676786765666444544452000
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.20.10.20.20.10.20.20.10.20.20.20.10.10.10.20.10.10.10.20.10.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-220210-200-1-2-110000-1000-2000-8-19-1-3-6-6-15-167-4-10
Percentage of OtherNonoperatingIncomeExpense100.0100.00.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.00.00.00.00.0-0.00.00.0-0.0-0.1-0.00.00.00.00.00.0-0.0-0.00.0-0.0-0.10.00.00.0-0.4-0.9-0.1-0.2-0.4-0.4-0.9-0.10.50.7-0.4-1.1

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

Income Loss From Continuing Operations Before Income Taxes Domestic

Income Loss From Continuing Operations Before Income Taxes Foreign

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value-690-115744122-83-47456102979029335703105613131-611834-5715142-4
Percentage of NonoperatingIncomeExpense100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.60.0-0.31.41.13.0-2.0-1.20.11.50.30.82.2-0.00.90.11.10.20.00.10.40.20.20.60.50.1-0.30.60.50.20.3-0.30.51.11.20.2-0.4

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value1421741601671421681851681777321641659214516834214713714512812712210812912411911992878378606972393527
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.44.13.84.03.54.14.54.24.519.14.44.52.64.24.910.24.64.34.64.24.44.54.25.25.15.25.64.64.64.64.63.84.75.33.33.22.8

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value14151640851348172238329951485065206543574832184854303744483863633434274572691843154834837599244212250107175
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.312.09.612.411.717.59.47.513.10.213.414.218.410.314.06.515.213.311.714.613.313.313.317.018.911.78.515.625.62.722.06.216.515.520.69.718.3

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value367395497509441648477456520-18495470557416444252441423397420382362355371348324319300284278276251243240227208208206203172151144136141113
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.79.211.712.310.715.711.711.413.3-0.513.112.815.712.012.97.513.813.112.513.613.213.213.814.814.413.813.913.914.114.314.614.014.214.414.214.015.215.716.715.615.816.016.018.215.2

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value367441456520-18495470557
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.710.711.413.3-0.513.112.815.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

Net Income Loss Available To Common Stockholders Diluted

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1742916204158441551716096159131527414806150451522114580139381362914262137161314012735130651226711797113831171892278687827982087617701267096521610756545668550751044916463745833338
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value68165182514249604960448942964158405745523601345536463534342432773123378734403256320439781845169616562073196816881493166715341561130015551164964873998685
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets39.132.032.532.030.828.228.128.127.029.924.724.826.824.825.024.924.529.028.027.628.234.020.019.520.025.325.824.122.325.625.127.623.028.222.819.618.821.820.5

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1742916204158441551716096159131527414806150451522114580139381362914262137161314012735130651226711797113831171892278687827982087617701267096521610756545668550751044916463745833338
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value1061311022107021055711136114241097810648109881066910979104839983107281029298629612927888278540817877407381699066226135564853235215485445724092436739523939395137643584265319651468
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets60.968.067.568.069.271.871.971.973.070.175.375.273.275.275.075.175.571.072.072.471.866.080.080.580.074.774.275.977.774.474.972.477.071.877.280.481.278.279.50.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-6526204433-3-90-87911595117118394008-11-44-37-86-300
Percentage of StockholdersEquity-0.60.20.20.40.3-0.0-0.8-0.10.71.10.91.11.20.40.4-0.00.1-0.1-0.5-0.4-1.1-4.9
Percentage of Assets-0.40.20.10.30.2-0.0-0.6-0.10.50.80.70.80.90.30.3-0.00.1-0.1-0.4-0.3-0.7-3.7
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-264-38-159-70-74-114-188-9463704433-17-114-56-95-62-106-113-90-123-276-239-3253520-915
Percentage of StockholdersEquity-2.5-0.3-1.5-0.7-0.7-1.0-1.7-0.90.60.70.40.3-0.2-1.1-0.5-1.0-0.6-1.1-1.3-1.1-1.6-4.5-4.9-8.21.00.8-0.51.0
Percentage of Assets-1.5-0.2-1.0-0.5-0.5-0.7-1.2-0.60.40.50.30.2-0.1-0.8-0.4-0.7-0.5-0.8-0.9-0.8-1.1-3.4-3.7-5.90.80.60.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-199-64-179-114-105-103-84-72-1-38-49-82-132-149-98-99-70-89-69-52-3424
Percentage of StockholdersEquity-1.9-0.6-1.7-1.1-0.9-0.9-0.8-0.7-0.0-0.4-0.4-0.8-1.3-1.4-1.0-1.0-0.7-1.0-0.8-0.6-0.40.4
Percentage of Assets-1.1-0.4-1.1-0.7-0.7-0.6-0.5-0.5-0.0-0.2-0.3-0.6-1.0-1.0-0.7-0.8-0.5-0.7-0.6-0.4-0.30.3
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value41333538644711955634920812859358453555546457692846664541450
Percentage of StockholdersEquity0.40.30.30.40.60.41.10.50.60.51.91.20.63.34.97.28.99.417.523.625.027.630.7
Percentage of Assets0.20.20.20.20.40.30.80.40.40.31.40.90.42.53.54.76.77.012.618.519.90.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value55666666666666663333222
Percentage of StockholdersEquity0.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.10.10.10.10.10.2
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.10.10.10.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value10831110221082010583111401148511041106811085610544107211031699351047889257301586246333582269819651430999
Percentage of StockholdersEquity102.1100.0101.1100.2100.0100.5100.6100.398.898.897.798.499.597.796.294.395.595.590.675.374.172.868.1
Percentage of Assets62.168.068.368.269.272.272.372.172.269.373.574.072.973.568.362.371.471.165.058.958.90.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value832576117391720678838677872783038990911185578099784286008199775875707908723767716406675072606740629061475739513348364814454141524196408538123757353535182307
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets47.847.046.646.449.054.557.156.159.859.958.758.157.560.359.859.059.460.559.057.456.357.678.777.676.074.975.373.272.173.874.473.474.074.274.776.476.276.869.1

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value3886264523431660950116113399011440192515771157130820341550168415232125147610891271201026171992193522132031167814741570132410501328131011811193129315401317103910801100735339
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.316.314.810.75.97.38.86.19.612.610.88.39.614.311.312.812.016.312.09.211.217.228.422.923.427.026.723.922.024.121.718.623.423.823.124.327.933.60.00.00.033.00.00.0

Short Term Investments

us-gaap:ShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value396779734134327183350342433463390313131363221296631353308279629272824257424772078176420002136192815341329122212691293130712951162112111101076874685298
Percentage of ShortTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.34.84.68.716.921.122.422.622.520.621.523.121.822.024.121.323.021.621.021.018.315.121.724.623.318.717.517.418.919.821.422.920.520.421.721.918.915.08.9

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value322032563438338633773257318732043145286528892680264425562492242723192252213521622059196818091822170316481637156014951345136312961234117911041075994901626
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.520.121.721.821.020.520.921.620.918.819.819.219.417.918.218.518.217.217.418.318.116.819.621.020.620.121.522.322.320.622.322.921.821.421.621.921.519.718.8

Other Assets Current

us-gaap:OtherAssetsCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value823931876817838909777852856833552632529526425399367337264322336352234257254268218220206219166198189225144180176181125
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.75.75.55.35.25.75.15.85.75.53.84.53.93.73.13.02.92.62.22.73.03.02.53.03.13.32.93.13.13.42.73.53.34.12.83.73.84.03.8

Land

Property Plant And Equipment Gross

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value13221309131813371314139413621345133313241304128413061311132312871270127112781277126812471101108610901081101110171008971878837784758664614601570481455
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.68.18.38.68.28.88.99.18.98.78.99.29.69.29.69.810.09.710.410.811.110.611.912.513.213.213.314.515.014.914.414.813.813.813.012.513.012.414.40.0

us-gaap:StatementGeographical

ctsh:RestofWorld



Period End2020-03-312019-12-312018-12-312017-12-31
Value776760853901
Percentage of PropertyPlantAndEquipmentNet58.758.161.268.1
Percentage of Assets4.54.75.45.9
Percentage of Assets ctsh:RestofWorld0.00.00.00.0

srt:Europe



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value100104971031101056352
Percentage of PropertyPlantAndEquipmentNet7.67.97.47.78.47.54.84.0
Percentage of Assets0.60.60.60.70.70.70.40.4
Percentage of Assets srt:Europe0.00.00.00.00.00.00.00.0

srt:NorthAmerica



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value446445451454420436360279
Percentage of PropertyPlantAndEquipmentNet33.734.034.234.032.031.327.221.3
Percentage of Assets2.62.72.82.92.62.72.42.0
Percentage of Assets srt:NorthAmerica0.00.00.00.00.00.00.00.0

Long Term Investments

us-gaap:LongTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value433177980798093808323526219811062
Percentage of LongTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.50.10.50.50.50.50.60.50.61.51.81.40.80.4

Investments In Affiliates Subsidiaries Associates And Joint Ventures

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value4014397936943651363834813037303627132704260825762563255424822457246124042403240524032413437449445444417412407309301289289288289224224223192154
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets23.024.623.323.522.621.919.920.518.017.817.918.518.817.918.118.719.318.419.620.421.120.64.75.25.45.45.55.96.14.74.95.15.15.25.74.64.84.95.80.0

us-gaap:BusinessAcquisition

us-gaap:SeriesOfIndividuallyImmaterialBusinessAcquisitions



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-03-312014-12-312013-12-312012-12-31
Value7623416715779634434012528157513012919
Percentage of Goodwill1.96.34.64.322.911.311.24.61.16.12.11.329.26.2
Percentage of Assets0.41.51.11.05.02.32.30.80.21.10.40.31.60.3
Percentage of Assets us-gaap:SeriesOfIndividuallyImmaterialBusinessAcquisitions0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value10051041119211611185115010211060955981957894923951936961862864881906928953109120124131118121122878786939710287818575
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.86.47.57.57.47.26.77.26.36.46.66.46.86.76.87.36.86.67.27.78.28.11.21.41.51.61.61.71.81.31.41.51.61.82.01.81.81.92.3

Finite Lived Intangible Assets Net

Deferred Tax Assets Liabilities Net

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value809736773767724689643615577448428430427359328286275268262277223209175166187183169160169160143120139113100119827549
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.64.54.94.94.54.34.24.23.82.92.93.13.12.52.42.22.22.12.12.42.01.81.91.92.32.22.22.32.52.52.32.12.52.12.02.41.81.61.5

Liabilities Current

us-gaap:LiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value28722983291928242720277726932537246928392600241525852418230021202050271321281956188425921741156715021774160213571225137712751151102112091040887801930646
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.518.418.418.216.917.517.617.116.418.717.817.319.017.016.816.116.120.817.316.616.622.118.918.018.221.621.019.418.321.120.920.418.022.020.418.017.320.319.4

Debt Current

Long Term Debt Current

Accounts Payable Current

us-gaap:AccountsPayableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value289239246254262215223217293210186179189175171164213165160169181145130119176113114941321081111041097278891177554
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.51.61.61.61.41.51.51.91.41.31.31.41.21.31.31.71.31.31.41.61.21.41.42.11.41.51.32.01.71.81.81.91.31.51.82.51.61.6

Taxes Payable Current

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value197152111108130162158174744823151210143417
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.10.90.70.70.81.01.01.20.50.30.20.10.10.10.10.30.1

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3843803663633593693293223333252752622963152752391771821741761791841571471381211081059291898881889467647866
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.22.32.32.32.22.32.22.22.22.11.91.92.22.22.01.81.41.41.41.51.61.61.71.71.71.51.41.51.41.41.51.61.41.61.91.41.41.72.0

Long Term Debt

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebt

ctsh:CreditAgreement, us-gaap:LoansPayable



Period End2020-03-312019-12-31
Value731741
Percentage of LongTermDebt100.0100.0
Percentage of Assets4.24.6
Percentage of Assets ctsh:CreditAgreement us-gaap:LoansPayable0.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value24307007097187277366246496736987237477727978218408588819009129259370
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets13.94.34.54.64.54.64.14.44.54.65.05.45.75.66.06.46.76.77.37.78.18.00.0

Deferred Tax Liabilities Noncurrent

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2292181811611502532602421991811591551551621401381381391291031111168510813327735231625228725440727634212073686238
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.31.11.00.91.61.71.61.31.21.11.11.11.11.01.11.11.11.10.91.01.00.91.31.63.44.64.53.84.44.27.24.96.22.41.51.51.41.2

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value1061311022107021055711136114241097810648109881066910979104839983107281029298629612927888278540817877407381699066226135564853235215485445724092436739523939395137643584265319651468
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets60.968.067.568.069.271.871.971.973.070.175.375.273.275.275.075.175.571.072.072.471.866.080.080.580.074.774.275.977.774.474.972.477.071.877.280.481.278.279.50.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-6526204433-3-90-87911595117118394008-11-44-37-86-300
Percentage of StockholdersEquity-0.60.20.20.40.3-0.0-0.8-0.10.71.10.91.11.20.40.4-0.00.1-0.1-0.5-0.4-1.1-4.9
Percentage of Assets-0.40.20.10.30.2-0.0-0.6-0.10.50.80.70.80.90.30.3-0.00.1-0.1-0.4-0.3-0.7-3.7
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-264-38-159-70-74-114-188-9463704433-17-114-56-95-62-106-113-90-123-276-239-3253520-915
Percentage of StockholdersEquity-2.5-0.3-1.5-0.7-0.7-1.0-1.7-0.90.60.70.40.3-0.2-1.1-0.5-1.0-0.6-1.1-1.3-1.1-1.6-4.5-4.9-8.21.00.8-0.51.0
Percentage of Assets-1.5-0.2-1.0-0.5-0.5-0.7-1.2-0.60.40.50.30.2-0.1-0.8-0.4-0.7-0.5-0.8-0.9-0.8-1.1-3.4-3.7-5.90.80.60.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-199-64-179-114-105-103-84-72-1-38-49-82-132-149-98-99-70-89-69-52-3424
Percentage of StockholdersEquity-1.9-0.6-1.7-1.1-0.9-0.9-0.8-0.7-0.0-0.4-0.4-0.8-1.3-1.4-1.0-1.0-0.7-1.0-0.8-0.6-0.40.4
Percentage of Assets-1.1-0.4-1.1-0.7-0.7-0.6-0.5-0.5-0.0-0.2-0.3-0.6-1.0-1.0-0.7-0.8-0.5-0.7-0.6-0.4-0.30.3
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value41333538644711955634920812859358453555546457692846664541450
Percentage of StockholdersEquity0.40.30.30.40.60.41.10.50.60.51.91.20.63.34.97.28.99.417.523.625.027.630.7
Percentage of Assets0.20.20.20.20.40.30.80.40.40.31.40.90.42.53.54.76.77.012.618.519.90.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value55666666666666663333222
Percentage of StockholdersEquity0.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.00.10.10.10.10.10.2
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.10.10.10.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value10831110221082010583111401148511041106811085610544107211031699351047889257301586246333582269819651430999
Percentage of StockholdersEquity102.1100.0101.1100.2100.0100.5100.6100.398.898.897.798.499.597.796.294.395.595.590.675.374.172.868.1
Percentage of Assets62.168.068.368.269.272.272.372.172.269.373.574.072.973.568.362.371.471.165.058.958.90.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value556666666666666666666666633333223333332
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.00.00.00.00.00.00.10.10.10.10.10.10.10.1

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value41333538644711955634920812859358279333301453432520607555560513572546482426503457404407731692644756813846664
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.40.30.80.40.40.31.40.90.42.52.02.52.43.53.54.45.34.76.15.96.96.76.36.17.57.06.67.212.912.612.615.417.618.519.9

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value10831110221082010583111401148511041106811085610544107211031699351047810063961893668925850181047684730169386583621158625538521849174633435540783826358233423115290726981965
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets62.168.068.368.269.272.272.372.172.269.373.574.072.973.573.473.273.568.369.368.767.562.375.275.875.071.472.774.473.371.171.372.167.565.065.563.462.758.958.9

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-264-38-159-70-74-114-188-9463704433-17-114-56-95-61-106-113-90-119-123-123-111-167-276-375-324-208-239-190-396-193-325-5076393520
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-1.5-0.2-1.0-0.5-0.5-0.7-1.2-0.60.40.50.30.2-0.1-0.8-0.4-0.7-0.5-0.8-0.9-0.8-1.0-1.1-1.3-1.3-2.0-3.4-4.9-4.6-3.1-3.7-3.1-7.0-3.4-5.9-1.01.60.90.80.6

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value4979387175752697028626403888367735212775985943596869081745618932458340815773101452
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.821.916.913.96.517.021.116.09.921.820.514.27.817.317.210.72.121.325.714.86.511.822.616.26.53.65.93.30.2

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value-272-3753401267356-550-266-584-227-160-124-38991-90-612-31-228-340-176-489-364-253464-257-433-185-95-252-57
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.4-8.88.030.68.7-13.3-6.5-14.6-5.8-4.2-3.3-10.62.6-2.6-17.7-0.9-7.1-10.5-5.6-15.9-12.5-92.42.5-10.2-17.9-9.2-5.6-18.4-6.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value1135-253-340-1137-839-325-146-734-488-333-231-297-112410-118-143-467306-248-149-5571611-8-93-6167-4943
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.9-5.9-8.0-27.5-20.4-7.9-3.6-18.3-12.5-8.7-6.1-8.1-31.70.3-3.4-4.3-14.69.5-7.8-4.8-19.158.8-0.3-3.7-0.30.80.4-3.64.5

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value4979387175752697028626403888367735212775985943596869081745618932458340815773101452
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.821.916.913.96.517.021.116.09.921.820.514.27.817.317.210.72.121.325.714.86.511.822.616.26.53.65.93.30.2

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value367395497509441648477456520-18495470557416444252441423397420382362355371348324319300284278276251243240227208208206203172151144136141113
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.79.211.712.310.715.711.711.413.3-0.513.112.815.712.012.97.513.813.112.513.613.213.213.814.814.413.813.913.914.114.314.614.014.214.414.214.015.215.716.715.615.816.016.018.215.2

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value367441456520-18495470557
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.710.711.413.3-0.513.112.815.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value136133127133133131127123117122114103104100979287888284756249484643362827
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value-272-3753401267356-550-266-584-227-160-124-38991-90-612-31-228-340-176-489-364-253464-257-433-185-95-252-57
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.4-8.88.030.68.7-13.3-6.5-14.6-5.8-4.2-3.3-10.62.6-2.6-17.7-0.9-7.1-10.5-5.6-15.9-12.5-92.42.5-10.2-17.9-9.2-5.6-18.4-6.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value112939796106969491968078606687747463746575587455384372605524
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments To Acquire Investments

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value1135-253-340-1137-839-325-146-734-488-333-231-297-112410-118-143-467306-248-149-5571611-8-93-6167-4943
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.9-5.9-8.0-27.5-20.4-7.9-3.6-18.3-12.5-8.7-6.1-8.1-31.70.3-3.4-4.3-14.69.5-7.8-4.8-19.158.8-0.3-3.7-0.30.80.4-3.64.5

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value121110111116116116116118118869089000
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value5111632591054771267456333163321330151419157772577616917538779122392248882
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value0.2780.0080000000000000070.2430.244-0.0170000000000000150.2790.270.2540.2170.2490.260.142-0.0249999999999999670.2760.5760.251-0.00100000000000000090.2690.2350.250.00.2330.2590.2630.2720.2850.2460.240.2480.2440.2110.2510.2570.1630.1720.152
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

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

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

Share Based Compensation

us-gaap:ShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value55455254666869715960525554514962535046494534313335273029222631242316141313
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

Unrecognized Tax Benefits

Deferred Tax Assets Valuation Allowance

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value927926905847809
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-03-312018-12-312018-03-312017-03-31
Value38862645950116115991308
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0

ctsh:CapitalizedContractCostCostsCapitalized



Period End2020-03-312019-03-31
Value3543
Percentage of CapitalizedContractCostCostsCapitalized100.0100.0

ctsh:ContractWithCustomerAssetRevenueRecognizedButNotBilled



Period End2020-03-312019-03-31
Value219238
Percentage of ContractWithCustomerAssetRevenueRecognizedButNotBilled100.0100.0

ctsh:ContractWithCustomerLiabilityAmountBilledButRevenueNotRecognized



Period End2020-03-312019-03-31
Value257205
Percentage of ContractWithCustomerLiabilityAmountBilledButRevenueNotRecognized100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value555254666869715960525554
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value555254666869715960525554
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostAmortization



Period End2020-03-312019-03-31
Value-22000000.0-20000000.0
Percentage of CapitalizedContractCostAmortization100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-03-312018-03-312017-03-31
Value1241-211-326-726
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0

us-gaap:ContractWithCustomerAssetReclassifiedToReceivable



Period End2020-03-312019-03-31
Value-194000000.0-208000000.0
Percentage of ContractWithCustomerAssetReclassifiedToReceivable100.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized



Period End2020-03-312019-03-31
Value-197000000.0-149000000.0
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0

us-gaap:DebtInstrument, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

ctsh:CreditAgreement, us-gaap:BaseRate



Period End2020-03-31
Value0.0
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

ctsh:CreditAgreement, us-gaap:Eurodollar



Period End2020-03-31
Value0.00875
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

us-gaap:Range, us-gaap:DebtInstrument, us-gaap:VariableRate

srt:Maximum, ctsh:CreditAgreement, ctsh:EurocurrencyWithoutDebtRatings



Period End2020-03-31
Value0.01125
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

srt:Maximum, ctsh:CreditAgreement, us-gaap:Eurodollar



Period End2020-03-31
Value0.01125
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

srt:Minimum, ctsh:CreditAgreement, ctsh:EurocurrencyWithoutDebtRatings



Period End2020-03-31
Value0.00875
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

srt:Minimum, ctsh:CreditAgreement, us-gaap:Eurodollar



Period End2020-03-31
Value0.0075
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value-19-103-23-138-42-38-5492170-54-19-46-70-4268-18-70-6529-56-45-333623-81923
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value13313212712512312011911410786828273604746444542414139393534322927272826232524222121
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:ForeignExchangeForward, us-gaap:Nondesignated, us-gaap:ForeignCurrencyGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value676-4-183182-7-3-3-102-52-2-130-125-4-8-8717-2
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-3224-487213540343520783-2-19-20-17
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:CostOfSales



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-3213-376183034292917672-2-16-17-14
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.050.075.075.087.585.785.785.785.085.382.985.080.084.184.4100.084.483.782.0

us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:SellingGeneralAndAdministrativeExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value0011-1113565631100-3-3-3
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet-0.00.050.025.025.012.514.314.314.315.014.717.115.020.015.915.6-0.015.616.318.0

us-gaap:DividendsCommonStockCash



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value120111114116116117119119899089
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1201111141161161171191198990
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value-119-8-3453-5-12-201521430-352-2326-8-50-6-9-1405048-8
Percentage of EffectOfExchangeRateOnCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-102-36-4716281-122-80-3126-16552-256-209-14-15-10-2-7-110-1-9-9-19-3
Percentage of ForeignCurrencyTransactionGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value510626658676583815662623697713658635649560612594589561543548510485463501473439420377364335322287277280243208178
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-1-57-100101011000000000
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.00.00.0100.00.0100.00.0100.0100.00.00.0100.0100.0100.00.00.00.00.0

us-gaap:IncreaseDecreaseInAccountsPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value44-1319-47491-2-898621-7-1113-56-42482-2-828-1836-576516384136
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value-13-21347-213152-1757273-35181178668741325513147511091610852149498992
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value5970-12-585630-69-45-239-31-576719-59-384138-22-4074
Percentage of IncreaseDecreaseInDeferredRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312012-03-312011-03-312010-03-31
Value-26-23913139-90152-7110-2472164
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-03-31
Value-328-121170178-386142144163-39366729395-384126214238-52524232171-20167171154-281-139-136-149-83
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterestAndDividend



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4140434548494740413634313229272730272017181717141310131312911998766
Percentage of InvestmentIncomeInterestAndDividend100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:OciBeforeReclassificationsBeforeTaxAttributableToParent

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-1139-281939114-96-91-1467635124563-72220-29
Percentage of OciBeforeReclassificationsBeforeTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-948-23153293-76-72-95142694447-51817-23
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value00026601-7-5011-6-225-40-120-1001-2010
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent0.00.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value-916-24113687-82-87-3620-22-179-141-81932-6642292155107-77-11351198-193
Percentage of OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value-135115-65-9-2-19-12-713711335017-500-2819-20-1623-40-28-3101250-196-9
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-191-54721-20-19-5162930115-243-5
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-1107-301543106-103-112-4927-280104-254-102439-8
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-249125-94124998-117-194-1630551123-6051-355210-23
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent226.41785.7313.380.0114.092.5113.6173.232.7111.1-17.90.0118.32768.295.0350.0216.727.5290.2

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-139118-64-6-3-15-14-824111335017-500-2920-20-16
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent126.41685.7213.3-40.0-7.0-14.213.673.2-83.740.7-117.90.016.32290.90.9290.083.3-52.0204.9

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value-226-8944074-94-157-62611509731206-203132-127364
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value-226121-8944074-94-157-626115097-5839-34447-222830-1255108-50-11631206-203
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-916-24113687-82-87-3620-22-179-141-82032-6
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent40.35.027.0275.090.0117.687.255.4600.076.9-200.0-2.081.42.4103.823.544.8460.629.8

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-226121-8944074-94-157-726115097-5839-34457-22
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0116.7100.0100.0100.0100.0100.0100.099.7100.9101.4100.0

us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-191-64719-21-25-137-6125013-246-1
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-234-58924-23-37-94-6126-212-173-1
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1121.1400.083.3200.0128.6126.3109.5148.069.257.1100.0100.0104.0362.591.050.0175.053.671.4

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-4313-14-2-1140000000000
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent121.1300.0-16.775.0-14.321.19.544.0-30.80.0-0.00.00.0-0.00.0-0.00.00.0-0.0

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

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:ForeignExchangeForward, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1139-281939114-96-91-14
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value-144-106-61272184-96-77-2337-14855-360-122-20-19-135-17-16-69-1130
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value000902432745505063009575414461176808845
Percentage of PaymentsToAcquireAvailableForSaleSecurities0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-31
Value8623914635197632147711446606701000267909113977
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.00.0100.00.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireHeldToMaturitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value20227017312942705742972222063533133492529
Percentage of PaymentsToAcquireHeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireOtherInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value54231502793134161287312215015459120409
Percentage of PaymentsToAcquireOtherInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value40323740503940426043424361414440493230313651023263143
Percentage of ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value1542175903433484143642151711961583515150
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProceedsFromRepaymentsOfLinesOfCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value17400000000-7575-150-20035000-100-250350-1000-5506500
Percentage of ProceedsFromRepaymentsOfLinesOfCredit100.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.0100.0100.00.0

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value000145765032261071319310524164481488930480
Percentage of ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleAndMaturityOfOtherInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value28331602792920140146591490101244154298
Percentage of ProceedsFromSaleAndMaturityOfOtherInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeStatementLocation, us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent

us-gaap:CostOfSales, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-3213-376183034292917673-2-16-17
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SellingGeneralAndAdministrativeExpenses, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0011-1113565631100-3-3
Percentage of ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent-0.00.0100.033.333.314.316.716.716.717.617.220.717.625.018.90.0-0.018.519.4

us-gaap:IncomeStatementLocation, us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

us-gaap:CostOfSales, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-3113-355132326222213453-2-12-14
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SellingGeneralAndAdministrativeExpenses, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0101-1112454520100-2-2
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent-0.0100.00.033.333.320.020.015.417.419.218.222.715.417.019.00.0-0.020.219.6

us-gaap:IncomeStatementLocation, us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:CostOfSales, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value01000215787741100-3-3
Percentage of ReclassificationFromAociCurrentPeriodTax0.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:SellingGeneralAndAdministrativeExpenses, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0-110000111111000000
Percentage of ReclassificationFromAociCurrentPeriodTax0.0-100.00.00.00.00.00.020.014.312.514.314.325.053.818.80.00.012.118.8

us-gaap:RepaymentsOfDebtAndCapitalLeaseObligations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value13127722252539332021211614131313131313140
Percentage of RepaymentsOfDebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:IncomeStatementLocation

us-gaap:RestructuringAndRelatedCostIncurredCost

us-gaap:RestructuringCharges



Period End2020-03-312019-03-31
Value552
Percentage of RestructuringAndRelatedCostIncurredCost100.0100.0

us-gaap:RestructuringCostAndReserve

us-gaap:EmployeeSeverance



Period End2020-03-312019-12-312019-09-302019-06-302018-09-302018-06-30
Value26493327110
Percentage of RestructuringAndRelatedCostIncurredCost47.30.00.00.00.00.0

us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan

ctsh:EmployeeRetentionCosts, ctsh:A2020FitforGrowth



Period End2020-03-312019-03-31
Value40
Percentage of RestructuringAndRelatedCostIncurredCost7.30.0

ctsh:EmployeeRetentionCosts, ctsh:RealignmentProgram



Period End2020-03-312019-03-31
Value60
Percentage of RestructuringAndRelatedCostIncurredCost10.90.0

ctsh:ExitFromContentRelatedServices, ctsh:A2020FitforGrowth



Period End2020-03-31
Value11
Percentage of RestructuringAndRelatedCostIncurredCost20.0

us-gaap:EmployeeSeverance, ctsh:A2020FitforGrowth



Period End2020-03-312019-03-31
Value260
Percentage of RestructuringAndRelatedCostIncurredCost47.30.0

us-gaap:FacilityClosing, ctsh:A2020FitforGrowth



Period End2020-03-312019-03-31
Value50
Percentage of RestructuringAndRelatedCostIncurredCost9.10.0

us-gaap:OtherRestructuring, ctsh:RealignmentProgram



Period End2020-03-312019-03-31
Value140
Percentage of RestructuringAndRelatedCostIncurredCost25.50.0

us-gaap:SpecialTerminationBenefits, ctsh:RealignmentProgram



Period End2020-03-312019-03-31
Value02
Percentage of RestructuringAndRelatedCostIncurredCost0.0100.0

us-gaap:RestructuringCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value551016549271101
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value222211223213
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value403740503940426043414461
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value403740503940426043414461
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value941910418452022
Percentage of StockRepurchasedAndRetiredDuringPeriodShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value52624110727712674563331633213301514
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value879212099179451211052621330414
Percentage of StockRepurchasedAndRetiredDuringPeriodValue16.538.211.212.867.0100.019.133.278.9100.0100.027.3

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value43914995267288051221170001100
Percentage of StockRepurchasedAndRetiredDuringPeriodValue83.561.888.887.233.00.080.966.821.10.00.072.7

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value0002112222223344445223455677788
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:AccruedTravelAndEntertainmentCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value242447413534574538324338343636322829373433354033282931282526282219181919171615
Percentage of AccruedTravelAndEntertainmentCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:CustomerVolumeandOtherIncentivesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value264251366357329323320312318289277223258
Percentage of CustomerVolumeandOtherIncentivesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ctsh:DebtSecuritiesTimeDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value48466484507506500389
Percentage of DebtSecuritiesTimeDeposits100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation

ctsh:EquityandCostMethodInvestments

ctsh:Longterminvestments



Period End2020-03-312019-12-31
Value4017
Percentage of EquityandCostMethodInvestments100.0100.0

us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName

ctsh:RestrictedInvestmentsInitiallyDeposited

us-gaap:ForeignCountry, us-gaap:MinistryOfFinanceIndia



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-04-30
Value3723933974074064040
Percentage of RestrictedInvestmentsInitiallyDeposited100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

ctsh:TimeDepositsFairValueDisclosure

us-gaap:ShortTermInvestments, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302018-12-31
Value48466484500
Percentage of TimeDepositsFairValueDisclosure100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementFrequency

us-gaap:ShortTermInvestments, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302018-12-31
Value48466484500
Percentage of TimeDepositsFairValueDisclosure100.0100.0100.0100.0

us-gaap:AccruedIncomeTaxesNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value4784784714714714784905085335840
Percentage of AccruedIncomeTaxesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:AccruedLiabilitiesAndOtherLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value199421912175205619152267212619121716207119811655156218561772156513251818165513481221152214421478
Percentage of AccruedLiabilitiesAndOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedProfessionalFeesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value13113711110911511011411310310099851039988747569677591826554524537354035333334323132363426
Percentage of AccruedProfessionalFeesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax

us-gaap:ForeignExchangeForward, us-gaap:CashFlowHedging



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value-6526-311539-11-86-299
Percentage of AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable



Period End2020-03-312019-12-31
Value7467
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value74671041009278686866656264584845484939393331362932282631292725272625242322192016
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AociBeforeTaxAttributableToParent

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-7931245439-4-110-71051541271551555153010-14-54-46-102-355
Percentage of AociBeforeTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-281-32-157-63-75-124-222-10589105757019-104-42-93-59-111-122-98-139-331
Percentage of AociBeforeTaxAttributableToParent355.7-103.2-654.2-116.7-192.33100.0201.81500.084.868.259.145.212.3-203.9-78.415650.0-590.0771.5226.4215.0136.393.2

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-202-63-181-117-111-108-93-793-38-49-82-132-149-98-99-70-89-69-52-3424
Percentage of AociBeforeTaxAttributableToParent255.7-203.2-754.2-216.7-284.62700.084.51128.62.9-24.7-38.6-52.9-85.2-292.2-183.116500.0-700.0624.3127.7113.933.9-6.8

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-1454106-1-2012639323837121302-2-9-8-15-55
Percentage of AociTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-17627-1-10-34-112635313736101413-4-9-8-16-55
Percentage of AociTaxAttributableToParent121.4120.050.070.0-16.71000.0170.0-1100.0100.089.796.997.497.383.3106.9-600.0150.0181.595.9100.0105.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-31
Value-31-2-3-6-5-9-740000000000000
Percentage of AociTaxAttributableToParent21.420.0-50.0-30.0-100.0500.045.0-700.015.40.00.00.00.00.00.0-0.00.0-0.0-0.0-0.0-0.0-0.0

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Period End2020-03-312019-12-31
Value118
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0

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Period End2020-03-312019-12-31
Value930
Percentage of BusinessCombinationContingentConsiderationLiability81.8375.0

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Period End2020-03-312019-12-312019-09-30
Value11837
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.00.0

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Period End2020-03-312019-12-31
Value930
Percentage of BusinessCombinationContingentConsiderationLiability81.8375.0

us-gaap:CapitalizedContractCostNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value498485485454423400383353330303
Percentage of CapitalizedContractCostNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312018-12-31
Value149868
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0

us-gaap:CashEquivalents, us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302018-12-31
Value156216461705103
Percentage of CashAndCashEquivalentsFairValueDisclosure104.30.00.0151.5

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us-gaap:CashEquivalents, us-gaap:CommercialPaper, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312018-12-31
Value149868
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0

us-gaap:CashEquivalents, us-gaap:MoneyMarketFunds, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302018-12-31
Value156216461705103
Percentage of CashAndCashEquivalentsFairValueDisclosure104.30.00.0151.5

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value359334365350335305320318307306
Percentage of ContractWithCustomerAssetGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value396336336348404348316385430431
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312018-12-312017-12-312016-12-31
Value38875
Percentage of CostMethodInvestments100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-31
Value122121121121121
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption100.0100.0100.0100.0100.0100.0100.0

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us-gaap:RetainedEarnings



Period End2020-03-312020-01-012019-12-312019-03-312018-12-312018-09-302018-06-302018-03-31
Value1122122122122122
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption100.00.0100.0100.0100.8100.8100.8100.8

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Period End2020-03-312019-12-31
Value594585
Percentage of DeferredIncomeTaxAssetsNet100.0100.0

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Period End2020-03-312019-12-31
Value3135
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0

us-gaap:DeferredRevenueCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3543132652853402862443083603833333373973062813213493232622883302241691791661821411341381491161061071058784828451
Percentage of DeferredRevenueCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value4223716364627277701041141331281511581756749535047800
Percentage of DeferredRevenueNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

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Period End2020-03-31
Value66
Percentage of DepositsAssets100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value500050005000500050000500072
Percentage of DepositsAssets7575.80.00.00.00.00.00.00.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value13434063552774010715413315515651541622961420623411
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value081500920244354171625103830100
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral0.018.655.60.00.08.413.018.027.734.633.330.918.026.117.46.223.538.358.77.949.10.70.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value53226322211436971341061121013437101674101201100
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral38.574.465.050.840.040.757.190.090.787.079.772.364.766.769.167.772.678.376.671.861.210.743.650.92.90.0

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Period End2020-03-312019-12-312019-09-302018-12-31
Value8321
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral61.57.05.03.7

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value540386052264361061541301551555154132285142041300
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral38.593.095.095.294.596.357.190.099.1100.097.7100.099.4100.0100.085.798.795.782.895.399.569.451.5100.03.70.0

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Period End2020-03-312019-12-312019-09-302018-12-31
Value8321
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral61.57.05.03.7

us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value7810201517341154335461344141524596178107138170230356
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312018-12-31
Value42721
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral53.870.061.8

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



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value362401948251020087132916129335491164
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral46.220.020.00.05.926.541.758.133.30.050.00.02.256.947.755.348.626.716.19.324.031.939.846.2

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Period End2020-03-312019-12-312018-12-31
Value014
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral0.010.011.8

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value7891461330114431030000141223596075107138165228354
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral100.090.070.040.076.588.299.1100.033.30.075.00.00.00.010.9100.079.795.199.797.695.799.999.997.499.199.7

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Period End2020-03-312019-12-312019-09-302018-12-31
Value0164
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral0.010.030.011.8

us-gaap:DerivativeLiabilitiesCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value428161516256718252613446810304565971051161381912261771121301061647512635812720
Percentage of DerivativeLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312018-12-31
Value11901505780
Percentage of DerivativeNotionalAmount100.0100.0100.0

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Period End2020-03-312019-12-312018-12-31
Value10058830
Percentage of DerivativeNotionalAmount84.558.70.0

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Period End2020-03-312019-12-31
Value1450
Percentage of DerivativeNotionalAmount12.20.0

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Period End2020-03-312019-12-312018-12-31
Value234023882168
Percentage of DerivativeNotionalAmount196.6158.7277.9

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Period End2020-03-312019-12-312018-12-31
Value338702507
Percentage of DerivativeNotionalAmount28.446.665.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value952123911581063931121610539288481272126210268571134111695580712721053782623906837741606894755591514661610490437632554463363533356
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312018-12-312017-12-312016-12-312016-09-302016-06-302015-12-31
Value37966675760590
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.00.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value133528352512740981341091121023437131676111222111
Percentage of ForeignCurrencyContractAssetFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value133528352512740981341091121023437131676111222111
Percentage of ForeignCurrencyContractAssetFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312018-12-31
Value42825
Percentage of ForeignCurrencyContractsLiabilityFairValueDisclosure100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value36241948251200871329161293354164
Percentage of ForeignCurrencyContractsLiabilityFairValueDisclosure85.725.00.00.036.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementFrequency

ctsh:AccruedExpensesAndOtherCurrentLiabilities, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value42816151625671825261344681030456597105116191
Percentage of ForeignCurrencyContractsLiabilityFairValueDisclosure100.0100.00.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherNoncurrentLiabilities, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value36241948251200871329161293354164
Percentage of ForeignCurrencyContractsLiabilityFairValueDisclosure85.725.00.00.036.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAtFairValueNet

us-gaap:ForeignExchangeForward, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value82-4-6-1-324-1-52-6-12-4-42-2000-31
Percentage of ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAtFairValueNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.00.00.00.00.00.01000000.00.00.00.00.00.00.0
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.00.00.00.00.00.0100.00.00.00.00.00.00.0

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0000015324100
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss0.00.00.00.00.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:FinancialInstrument

ctsh:CorporateAndOtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value0000002
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss0.00.00.00.00.00.050.0

us-gaap:CommercialPaper



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312017-12-31
Value000012
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss0.00.00.00.0100.050.0

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value149112212851275881091903681867631217223
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

ctsh:CorporateAndOtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value1004221635320473
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue67.137.5100.02.127.654.454.6

us-gaap:CommercialPaper



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312017-12-31
Value497027992268394
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue32.962.597.972.445.645.4

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0000014324100
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.00.00.00.00.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:FinancialInstrument

ctsh:CorporateAndOtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value0000002
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.00.00.00.00.00.050.0

us-gaap:CommercialPaper



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312017-12-31
Value000012
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.00.00.00.0100.050.0

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value14911215279121531923872649867631217223
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

ctsh:CorporateAndOtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value1004215029263473
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue67.137.5100.00.024.049.554.6

us-gaap:CommercialPaper



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312017-12-31
Value497027992268394
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue32.962.5100.076.050.545.4

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value006665716831320000
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.00.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:FinancialInstrument

ctsh:CorporateAndOtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value00666570
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.00.0100.0100.0100.0100.00.0

us-gaap:FinancialInstrument, ctsh:CreditRatingCRISIL

us-gaap:HeldToMaturitySecuritiesCurrent

ctsh:CorporateAndOtherDebtSecurities, ctsh:CRISILAA



Period End2020-03-31
Value30
Percentage of HeldToMaturitySecuritiesCurrent100.0

ctsh:CorporateAndOtherDebtSecurities, ctsh:CRISILAAA



Period End2020-03-31
Value116
Percentage of HeldToMaturitySecuritiesCurrent386.7

us-gaap:FinancialInstrument, us-gaap:InvestmentType

ctsh:CorporateAndOtherDebtSecurities, us-gaap:ShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value14610177257417546346
Percentage of HeldToMaturitySecuritiesCurrent486.70.00.00.00.00.00.0

us-gaap:CommercialPaper, us-gaap:ShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value175186147553409519399
Percentage of HeldToMaturitySecuritiesCurrent583.30.00.00.00.00.00.0

us-gaap:InvestmentType

us-gaap:ShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value32128722481082610651133987943745677543341
Percentage of HeldToMaturitySecuritiesCurrent1070.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:HeldToMaturitySecuritiesFairValue

ctsh:CorporateAndOtherDebtSecurities, us-gaap:ShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value14610177258418546345
Percentage of HeldToMaturitySecuritiesFairValue100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommercialPaper, us-gaap:ShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value175186148553410518397
Percentage of HeldToMaturitySecuritiesFairValue119.9184.2192.2214.398.194.9115.1

us-gaap:InvestmentType

us-gaap:ShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value32128722581182810641128984941742677543341
Percentage of HeldToMaturitySecuritiesFairValue219.9284.2292.2314.3198.1194.90.00.00.0215.10.00.00.0

us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LineOfCredit

us-gaap:RevolvingCreditFacility, ctsh:CreditAgreement, us-gaap:UnsecuredDebt



Period End2020-03-312019-12-31
Value17400
Percentage of LineOfCredit100.00.0

us-gaap:OperatingLeaseLiabilityCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value197202195201184
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLiabilityNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value734745734679651
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation

us-gaap:RestrictedInvestments

ctsh:Longterminvestments



Period End2020-03-31
Value393
Percentage of RestrictedInvestments100.0

us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

ctsh:Longterminvestments, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-31
Value393
Percentage of RestrictedInvestments100.0

us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementFrequency

ctsh:Longterminvestments, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-31
Value393
Percentage of RestrictedInvestments100.0

us-gaap:RestructuringCostAndReserve

us-gaap:RestructuringReserveCurrent

us-gaap:EmployeeSeverance



Period End2020-03-312019-12-312019-09-302018-12-31
Value3847280
Percentage of RestructuringReserveCurrent100.0100.0100.00.0

us-gaap:SubsequentEventType

us-gaap:StockRepurchaseProgramAuthorizedAmount1

us-gaap:SubsequentEvent



Period End2020-02-032016-08-042014-08-07
Value750030002
Percentage of StockRepurchaseProgramAuthorizedAmount1100.0100.0100.0

us-gaap:TradingSecuritiesEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value2726262625252525252525252525250
Percentage of TradingSecuritiesEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:BalanceSheetLocation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:ShortTermInvestments, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302018-12-31
Value27262625
Percentage of TradingSecuritiesEquity100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:FairValueByMeasurementFrequency

us-gaap:ShortTermInvestments, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302018-12-31
Value27262625
Percentage of TradingSecuritiesEquity100.0100.0100.0100.0

Line plots across dimensions of each concept

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments


us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical


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


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents


us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical


us-gaap:StockholdersEquity us-gaap:StatementEquityComponents