3.2.0.727 html 229 225 1 false 49 0 false 4 false false R1.htm 0001000 - Document - Document And Entity Information Sheet http://www.cognizant.com/role/DocumentAndEntityInformation Document And Entity Information Cover 1 false false R2.htm 1001000 - Statement - Condensed Consolidated Statements Of Financial Position Sheet http://www.cognizant.com/role/CondensedConsolidatedStatementsOfFinancialPosition Condensed Consolidated Statements Of Financial Position Statements 2 false false R3.htm 1001501 - Statement - Condensed Consolidated Statements Of Financial Position (Parenthetical) Sheet http://www.cognizant.com/role/CondensedConsolidatedStatementsOfFinancialPositionParenthetical Condensed Consolidated Statements Of Financial Position (Parenthetical) Statements 3 false false R4.htm 1002000 - Statement - Condensed Consolidated Statements Of Operations Sheet http://www.cognizant.com/role/CondensedConsolidatedStatementsOfOperations Condensed Consolidated Statements Of Operations Statements 4 false false R5.htm 1003000 - Statement - Condensed Consolidated Statements Of Comprehensive Income Sheet http://www.cognizant.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome Condensed Consolidated Statements Of Comprehensive Income Statements 5 false false R6.htm 1004000 - Statement - Condensed Consolidated Statements Of Cash Flows Sheet http://www.cognizant.com/role/CondensedConsolidatedStatementsOfCashFlows Condensed Consolidated Statements Of Cash Flows Statements 6 false false R7.htm 2101100 - Disclosure - Interim Condensed Consolidated Financial Statements Sheet http://www.cognizant.com/role/InterimCondensedConsolidatedFinancialStatements Interim Condensed Consolidated Financial Statements Notes 7 false false R8.htm 2103100 - Disclosure - Short-term Investments Sheet http://www.cognizant.com/role/ShortTermInvestments Short-term Investments Notes 8 false false R9.htm 2104100 - Disclosure - Accrued Expenses And Other Current Liabilities Sheet http://www.cognizant.com/role/AccruedExpensesAndOtherCurrentLiabilities Accrued Expenses And Other Current Liabilities Notes 9 false false R10.htm 2105100 - Disclosure - Debt Sheet http://www.cognizant.com/role/Debt Debt Notes 10 false false R11.htm 2106100 - Disclosure - Income Taxes Sheet http://www.cognizant.com/role/IncomeTaxes Income Taxes Notes 11 false false R12.htm 2107100 - Disclosure - Fair Value Measurements Sheet http://www.cognizant.com/role/FairValueMeasurements Fair Value Measurements Notes 12 false false R13.htm 2108100 - Disclosure - Derivative Financial Instruments Sheet http://www.cognizant.com/role/DerivativeFinancialInstruments Derivative Financial Instruments Notes 13 false false R14.htm 2109100 - Disclosure - Commitments And Contingencies Sheet http://www.cognizant.com/role/CommitmentsAndContingencies Commitments And Contingencies Notes 14 false false R15.htm 2110100 - Disclosure - Accumulated Other Comprehensive Income (Loss) Sheet http://www.cognizant.com/role/AccumulatedOtherComprehensiveIncomeLoss Accumulated Other Comprehensive Income (Loss) Notes 15 false false R16.htm 2111100 - Disclosure - Segment Information Sheet http://www.cognizant.com/role/SegmentInformation Segment Information Notes 16 false false R17.htm 2201201 - Disclosure - Interim Condensed Consolidated Financial Statements (Policies) Sheet http://www.cognizant.com/role/InterimCondensedConsolidatedFinancialStatementsPolicies Interim Condensed Consolidated Financial Statements (Policies) Policies 17 false false R18.htm 2303301 - Disclosure - Short-term Investments (Tables) Sheet http://www.cognizant.com/role/ShortTermInvestmentsTables Short-term Investments (Tables) Tables http://www.cognizant.com/role/ShortTermInvestments 18 false false R19.htm 2304301 - Disclosure - Accrued Expenses And Other Current Liabilities (Tables) Sheet http://www.cognizant.com/role/AccruedExpensesAndOtherCurrentLiabilitiesTables Accrued Expenses And Other Current Liabilities (Tables) Tables http://www.cognizant.com/role/AccruedExpensesAndOtherCurrentLiabilities 19 false false R20.htm 2305301 - Disclosure - Debt (Tables) Sheet http://www.cognizant.com/role/DebtTables Debt (Tables) Tables http://www.cognizant.com/role/Debt 20 false false R21.htm 2306301 - Disclosure - Income Taxes (Tables) Sheet http://www.cognizant.com/role/IncomeTaxesTables Income Taxes (Tables) Tables http://www.cognizant.com/role/IncomeTaxes 21 false false R22.htm 2307301 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.cognizant.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.cognizant.com/role/FairValueMeasurements 22 false false R23.htm 2308301 - Disclosure - Derivative Financial Instruments (Tables) Sheet http://www.cognizant.com/role/DerivativeFinancialInstrumentsTables Derivative Financial Instruments (Tables) Tables http://www.cognizant.com/role/DerivativeFinancialInstruments 23 false false R24.htm 2310301 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables) Sheet http://www.cognizant.com/role/AccumulatedOtherComprehensiveIncomeLossTables Accumulated Other Comprehensive Income (Loss) (Tables) Tables http://www.cognizant.com/role/AccumulatedOtherComprehensiveIncomeLoss 24 false false R25.htm 2311301 - Disclosure - Segment Information (Tables) Sheet http://www.cognizant.com/role/SegmentInformationTables Segment Information (Tables) Tables http://www.cognizant.com/role/SegmentInformation 25 false false R26.htm 2401402 - Disclosure - Interim Condensed Consolidated Financial Statements (Details) Sheet http://www.cognizant.com/role/InterimCondensedConsolidatedFinancialStatementsDetails Interim Condensed Consolidated Financial Statements (Details) Details http://www.cognizant.com/role/InterimCondensedConsolidatedFinancialStatementsPolicies 26 false false R27.htm 2403402 - Disclosure - Short-term Investments (Investments) (Details) Sheet http://www.cognizant.com/role/ShortTermInvestmentsInvestmentsDetails Short-term Investments (Investments) (Details) Details http://www.cognizant.com/role/ShortTermInvestmentsTables 27 false false R28.htm 2403403 - Disclosure - Short-term Investments (Amortized Cost, Gross Unrealized Gains And Losses And Fair Value Of Investment Securities Available-For-Sale) (Details) Sheet http://www.cognizant.com/role/ShortTermInvestmentsAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueOfInvestmentSecuritiesAvailableForSaleDetails Short-term Investments (Amortized Cost, Gross Unrealized Gains And Losses And Fair Value Of Investment Securities Available-For-Sale) (Details) Details http://www.cognizant.com/role/ShortTermInvestmentsTables 28 false false R29.htm 2403404 - Disclosure - Short-term Investments (Available-For-Sale Securities In A Continuous Unrealized Loss Position) (Details) Sheet http://www.cognizant.com/role/ShortTermInvestmentsAvailableForSaleSecuritiesInContinuousUnrealizedLossPositionDetails Short-term Investments (Available-For-Sale Securities In A Continuous Unrealized Loss Position) (Details) Details http://www.cognizant.com/role/ShortTermInvestmentsTables 29 false false R30.htm 2403405 - Disclosure - Short-term Investments (Contractual Maturities Of Investments In Debt Securities Available-For-Sale) (Details) Sheet http://www.cognizant.com/role/ShortTermInvestmentsContractualMaturitiesOfInvestmentsInDebtSecuritiesAvailableForSaleDetails Short-term Investments (Contractual Maturities Of Investments In Debt Securities Available-For-Sale) (Details) Details http://www.cognizant.com/role/ShortTermInvestmentsTables 30 false false R31.htm 2403406 - Disclosure - Short-term Investments (Gross Gains (Losses) Realized On Sales, Maturities And Other Securities Transactions Related To Investment Securities) (Details) Sheet http://www.cognizant.com/role/ShortTermInvestmentsGrossGainsLossesRealizedOnSalesMaturitiesAndOtherSecuritiesTransactionsRelatedToInvestmentSecuritiesDetails Short-term Investments (Gross Gains (Losses) Realized On Sales, Maturities And Other Securities Transactions Related To Investment Securities) (Details) Details http://www.cognizant.com/role/ShortTermInvestmentsTables 31 false false R32.htm 2404402 - Disclosure - Accrued Expenses And Other Current Liabilities (Accrued Expenses And Other Current Liabilities) (Details) Sheet http://www.cognizant.com/role/AccruedExpensesAndOtherCurrentLiabilitiesAccruedExpensesAndOtherCurrentLiabilitiesDetails Accrued Expenses And Other Current Liabilities (Accrued Expenses And Other Current Liabilities) (Details) Details http://www.cognizant.com/role/AccruedExpensesAndOtherCurrentLiabilitiesTables 32 false false R33.htm 2405402 - Disclosure - Debt - Additional Disclosures (Details) Sheet http://www.cognizant.com/role/DebtAdditionalDisclosuresDetails Debt - Additional Disclosures (Details) Details 33 false false R34.htm 2405403 - Disclosure - Debt - Short-term Debt (Details) Sheet http://www.cognizant.com/role/DebtShortTermDebtDetails Debt - Short-term Debt (Details) Details 34 false false R35.htm 2405404 - Disclosure - Debt - Long-term Debt (Details) Sheet http://www.cognizant.com/role/DebtLongTermDebtDetails Debt - Long-term Debt (Details) Details 35 false false R36.htm 2406402 - Disclosure - Income Taxes (Narrative) (Details) Sheet http://www.cognizant.com/role/IncomeTaxesNarrativeDetails Income Taxes (Narrative) (Details) Details http://www.cognizant.com/role/IncomeTaxesTables 36 false false R37.htm 2406403 - Disclosure - Income Taxes (Schedule Of Effective Tax Rate) (Details) Sheet http://www.cognizant.com/role/IncomeTaxesScheduleOfEffectiveTaxRateDetails Income Taxes (Schedule Of Effective Tax Rate) (Details) Details http://www.cognizant.com/role/IncomeTaxesTables 37 false false R38.htm 2407402 - Disclosure - Fair Value Measurements (Financial Assets And (Liabilities) Measured At Fair Value On A Recurring Basis) (Details) Sheet http://www.cognizant.com/role/FairValueMeasurementsFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails Fair Value Measurements (Financial Assets And (Liabilities) Measured At Fair Value On A Recurring Basis) (Details) Details http://www.cognizant.com/role/FairValueMeasurementsTables 38 false false R39.htm 2408402 - Disclosure - Derivative Financial Instruments (Narrative) (Details) Sheet http://www.cognizant.com/role/DerivativeFinancialInstrumentsNarrativeDetails Derivative Financial Instruments (Narrative) (Details) Details http://www.cognizant.com/role/DerivativeFinancialInstrumentsTables 39 false false R40.htm 2408403 - Disclosure - Derivative Financial Instruments (Location And Fair Values Of Derivative Financial Instruments In Our Consolidated Statement Of Financial Position) (Details) Sheet http://www.cognizant.com/role/DerivativeFinancialInstrumentsLocationAndFairValuesOfDerivativeFinancialInstrumentsInOurConsolidatedStatementOfFinancialPositionDetails Derivative Financial Instruments (Location And Fair Values Of Derivative Financial Instruments In Our Consolidated Statement Of Financial Position) (Details) Details http://www.cognizant.com/role/DerivativeFinancialInstrumentsTables 40 false false R41.htm 2408404 - Disclosure - Derivative Financial Instruments (Notional Value Of Outstanding Cash Flow Hedge Contracts By Year Of Maturity And Net Unrealized (Loss) Gain Included In Accumulated Other Comprehensive Income) (Details) Sheet http://www.cognizant.com/role/DerivativeFinancialInstrumentsNotionalValueOfOutstandingCashFlowHedgeContractsByYearOfMaturityAndNetUnrealizedLossGainIncludedInAccumulatedOtherComprehensiveIncomeDetails Derivative Financial Instruments (Notional Value Of Outstanding Cash Flow Hedge Contracts By Year Of Maturity And Net Unrealized (Loss) Gain Included In Accumulated Other Comprehensive Income) (Details) Details http://www.cognizant.com/role/DerivativeFinancialInstrumentsTables 41 false false R42.htm 2408405 - Disclosure - Derivative Financial Instruments (Location And Amounts Of Pre-Tax Gains (Losses) On Cash Flow Hedge Derivatives Financial Instruments) (Details) Sheet http://www.cognizant.com/role/DerivativeFinancialInstrumentsLocationAndAmountsOfPreTaxGainsLossesOnCashFlowHedgeDerivativesFinancialInstrumentsDetails Derivative Financial Instruments (Location And Amounts Of Pre-Tax Gains (Losses) On Cash Flow Hedge Derivatives Financial Instruments) (Details) Details http://www.cognizant.com/role/DerivativeFinancialInstrumentsTables 42 false false R43.htm 2408406 - Disclosure - Derivative Financial Instruments (Other Derivatives) (Details) Sheet http://www.cognizant.com/role/DerivativeFinancialInstrumentsOtherDerivativesDetails Derivative Financial Instruments (Other Derivatives) (Details) Details http://www.cognizant.com/role/DerivativeFinancialInstrumentsTables 43 false false R44.htm 2408407 - Disclosure - Derivative Financial Instruments (Location And Amounts Of Pre-Tax Gains (Losses) On Derivative Financial Instruments Not Designated As Hedges) (Details) Sheet http://www.cognizant.com/role/DerivativeFinancialInstrumentsLocationAndAmountsOfPreTaxGainsLossesOnDerivativeFinancialInstrumentsNotDesignatedAsHedgesDetails Derivative Financial Instruments (Location And Amounts Of Pre-Tax Gains (Losses) On Derivative Financial Instruments Not Designated As Hedges) (Details) Details http://www.cognizant.com/role/DerivativeFinancialInstrumentsTables 44 false false R45.htm 2410402 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Schedule Of Changes In Accumulated Other Comprehensive Income (Loss) By Component) (Details) Sheet http://www.cognizant.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleOfChangesInAccumulatedOtherComprehensiveIncomeLossByComponentDetails Accumulated Other Comprehensive Income (Loss) (Schedule Of Changes In Accumulated Other Comprehensive Income (Loss) By Component) (Details) Details http://www.cognizant.com/role/AccumulatedOtherComprehensiveIncomeLossTables 45 false false R46.htm 2411402 - Disclosure - Segment Information (Narrative) (Details) Sheet http://www.cognizant.com/role/SegmentInformationNarrativeDetails Segment Information (Narrative) (Details) Details http://www.cognizant.com/role/SegmentInformationTables 46 false false R47.htm 2411403 - Disclosure - Segment Information (Revenues From External Customers And Segment Operating Profit) (Details) Sheet http://www.cognizant.com/role/SegmentInformationRevenuesFromExternalCustomersAndSegmentOperatingProfitDetails Segment Information (Revenues From External Customers And Segment Operating Profit) (Details) Details http://www.cognizant.com/role/SegmentInformationTables 47 false false R48.htm 2411404 - Disclosure - Segment Information (Revenues And Long-Lived Assets By Geographic Area) (Details) Sheet http://www.cognizant.com/role/SegmentInformationRevenuesAndLongLivedAssetsByGeographicAreaDetails Segment Information (Revenues And Long-Lived Assets By Geographic Area) (Details) Details http://www.cognizant.com/role/SegmentInformationTables 48 false false All Reports Book All Reports In ''Condensed Consolidated Statements Of Financial Position'', column(s) 2, 4, 5, 6 are contained in other reports, so were removed by flow through suppression. In ''Condensed Consolidated Statements Of Cash Flows'', column(s) 1, 2 are contained in other reports, so were removed by flow through suppression. ctsh-20150630.xml ctsh-20150630_cal.xml ctsh-20150630_def.xml ctsh-20150630_lab.xml ctsh-20150630_pre.xml ctsh-20150630.xsd true true