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  <element name="DisclosureActivitiesRelatingToCapitalizedSoftwareAbstract" id="tdc_DisclosureActivitiesRelatingToCapitalizedSoftwareAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureAggregateAmortizationExpenseForAcquiredIntangibleAssetsAbstract" id="tdc_DisclosureAggregateAmortizationExpenseForAcquiredIntangibleAssetsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureAmountsInAccumulatedOtherComprehensiveIncomeExpectedToBeRecognizedAsComponentsOfNetPeriodicBenefitCostAbstract" id="tdc_DisclosureAmountsInAccumulatedOtherComprehensiveIncomeExpectedToBeRecognizedAsComponentsOfNetPeriodicBenefitCostAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureAnnualContractualMaturitiesOfPrincipalOnDebtOutstandingAbstract" id="tdc_DisclosureAnnualContractualMaturitiesOfPrincipalOnDebtOutstandingAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisAndSubjectToFairValueDisclosureRequirementsAbstract" id="tdc_DisclosureAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisAndSubjectToFairValueDisclosureRequirementsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="DisclosureCommitmentsAndContingenciesAdditionalInformationAbstract" id="tdc_DisclosureCommitmentsAndContingenciesAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureComponentsOfBasicAndDilutedEarningsPerShareAbstract" id="tdc_DisclosureComponentsOfBasicAndDilutedEarningsPerShareAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureCompositionOfTeradataRestrictedStockGrantsAbstract" id="tdc_DisclosureCompositionOfTeradataRestrictedStockGrantsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureDebtAdditionalInformationAbstract" id="tdc_DisclosureDebtAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureDeferredIncomeTaxAssetsAndLiabilitiesAbstract" id="tdc_DisclosureDeferredIncomeTaxAssetsAndLiabilitiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureDerivativeInstrumentsandHedgingActivitiesAdditionalInformationAbstract" id="tdc_DisclosureDerivativeInstrumentsandHedgingActivitiesAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="DisclosureDifferenceBetweenTheEffectiveTaxRateAndTheUSFederalStatutoryIncomeTaxRateAbstract" id="tdc_DisclosureDifferenceBetweenTheEffectiveTaxRateAndTheUSFederalStatutoryIncomeTaxRateAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="DisclosureEmployeeStockBasedCompensationPlansAdditionalInformationAbstract" id="tdc_DisclosureEmployeeStockBasedCompensationPlansAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="DisclosureFairValueOfEachOptionAwardOnTheGrantDateUsingTheBlackScholesOptionPricingModelAbstract" id="tdc_DisclosureFairValueOfEachOptionAwardOnTheGrantDateUsingTheBlackScholesOptionPricingModelAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureFutureMinimumOperatingLeasePaymentsAndCommittedSubleasesUnderNonCancelableLeasesAbstract" id="tdc_DisclosureFutureMinimumOperatingLeasePaymentsAndCommittedSubleasesUnderNonCancelableLeasesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureGoodwillByOperatingSegmentAbstract" id="tdc_DisclosureGoodwillByOperatingSegmentAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureGrossCarryingAmountAndAccumulatedAmortizationForTeradatasAcquiredIntangibleAssetsAbstract" id="tdc_DisclosureGrossCarryingAmountAndAccumulatedAmortizationForTeradatasAcquiredIntangibleAssetsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureIncomeBeforeIncomeTaxesAbstract" id="tdc_DisclosureIncomeBeforeIncomeTaxesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureIncomeTaxesAdditionalInformationAbstract" id="tdc_DisclosureIncomeTaxesAdditionalInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureIncomeTaxExpenseAbstract" id="tdc_DisclosureIncomeTaxExpenseAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureLiabilityRelatedToUncertainTaxPositionsAbstract" id="tdc_DisclosureLiabilityRelatedToUncertainTaxPositionsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="DisclosureRegionalSegmentRevenueAndGrossMarginForCompanyAbstract" id="tdc_DisclosureRegionalSegmentRevenueAndGrossMarginForCompanyAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureRestrictedStockAndRestrictedStockUnitActivityAbstract" id="tdc_DisclosureRestrictedStockAndRestrictedStockUnitActivityAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureRevenueByProductAndServicesAbstract" id="tdc_DisclosureRevenueByProductAndServicesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="DisclosureScheduleOfPensionAndPostemploymentBenefitCostsAbstract" id="tdc_DisclosureScheduleOfPensionAndPostemploymentBenefitCostsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="DisclosureWeightedAverageAssetAllocationByAssetCategoryAbstract" id="tdc_DisclosureWeightedAverageAssetAllocationByAssetCategoryAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="RemainingSharesAuthorizedToBeIssuedUnderEmployeeStockPurchaseProgram" id="tdc_RemainingSharesAuthorizedToBeIssuedUnderEmployeeStockPurchaseProgram" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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  <element name="RestrictedStockUnitsWithMarketBasedPerformanceCriteriaMember" id="tdc_RestrictedStockUnitsWithMarketBasedPerformanceCriteriaMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RevolvingCreditFacilityPeriod" id="tdc_RevolvingCreditFacilityPeriod" type="xbrli:positiveIntegerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="RiskFreeInterestRateWithinContractualLifeOfOption" id="tdc_RiskFreeInterestRateWithinContractualLifeOfOption" type="us-types:durationStringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SavingsPlansAxis" id="tdc_SavingsPlansAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem"/>
  <element name="SavingsPlansDomain" id="tdc_SavingsPlansDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfActivitiesRelatingToCapitalizedSoftwareTextBlock" id="tdc_ScheduleOfActivitiesRelatingToCapitalizedSoftwareTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfBenefitObligationsWeightedAverageAssumptionsLineItems" id="tdc_ScheduleOfBenefitObligationsWeightedAverageAssumptionsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfBenefitObligationsWeightedAverageAssumptionsTable" id="tdc_ScheduleOfBenefitObligationsWeightedAverageAssumptionsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ScheduleOfDebtOutstandingTable" id="tdc_ScheduleOfDebtOutstandingTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ScheduleOfDefinedBenefitPlanAssetAllocationTargetsLineItems" id="tdc_ScheduleOfDefinedBenefitPlanAssetAllocationTargetsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfDefinedBenefitPlanAssetAllocationTargetsTable" id="tdc_ScheduleOfDefinedBenefitPlanAssetAllocationTargetsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems" id="tdc_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable" id="tdc_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ScheduleOfEffectiveTaxRatesLineItems" id="tdc_ScheduleOfEffectiveTaxRatesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfFairValueAssetsMeasurementsTableTextBlock" id="tdc_ScheduleOfFairValueAssetsMeasurementsTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfIdentifiableAssetsBySegmentLineItems" id="tdc_ScheduleOfIdentifiableAssetsBySegmentLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfIdentifiableAssetsBySegmentTable" id="tdc_ScheduleOfIdentifiableAssetsBySegmentTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ScheduleOfIncomeTaxLineItems" id="tdc_ScheduleOfIncomeTaxLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfIncomeTaxTable" id="tdc_ScheduleOfIncomeTaxTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ScheduleOfRevenueByProductAndServiceRevenueTableTextBlock" id="tdc_ScheduleOfRevenueByProductAndServiceRevenueTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfShareBasedPaymentAwardMarketBasedPerformanceRestrictedStockUnitsValuationAssumptionsTableTextBlock" id="tdc_ScheduleOfShareBasedPaymentAwardMarketBasedPerformanceRestrictedStockUnitsValuationAssumptionsTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfUnrecognizedTaxBenefitsLineItems" id="tdc_ScheduleOfUnrecognizedTaxBenefitsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ScheduleOfUnrecognizedTaxBenefitsTable" id="tdc_ScheduleOfUnrecognizedTaxBenefitsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ServiceBasedAwardsMember" id="tdc_ServiceBasedAwardsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ServiceBasedSharesMember" id="tdc_ServiceBasedSharesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageGrantDateFairValues" id="tdc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageGrantDateFairValues" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsGrantDateFairValuePerShareOfCompanyCommonStock" id="tdc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsGrantDateFairValuePerShareOfCompanyCommonStock" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedLineItems" id="tdc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedTable" id="tdc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsMethodUsedTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPerformanceVestingHurdleFutureFairValuePerShareOfCompanyCommonStock" id="tdc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPerformanceVestingHurdleFutureFairValuePerShareOfCompanyCommonStock" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" id="tdc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" id="tdc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementsNumberOfPerformanceMetrics" id="tdc_ShareBasedCompensationArrangementsNumberOfPerformanceMetrics" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationArrangementsPayoutRangeOnPerformanceAwards" id="tdc_ShareBasedCompensationArrangementsPayoutRangeOnPerformanceAwards" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="ShareBasedCompensationNetOfTax" id="tdc_ShareBasedCompensationNetOfTax" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SharesAuthorizedToBeIssuedUnderEmployeeStockPurchaseProgram" id="tdc_SharesAuthorizedToBeIssuedUnderEmployeeStockPurchaseProgram" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockIssuedDuringPeriodSharesEmployeeStockCompensationEmployeeStockPurchaseProgramsAndOptionExercises" id="tdc_StockIssuedDuringPeriodSharesEmployeeStockCompensationEmployeeStockPurchaseProgramsAndOptionExercises" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="StockIssuedDuringPeriodValueEmployeeStockCompensationEmployeeStockPurchaseProgramsAndOptionExercises" id="tdc_StockIssuedDuringPeriodValueEmployeeStockCompensationEmployeeStockPurchaseProgramsAndOptionExercises" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SupplementalBalanceSheetInformationTableTextBlock" id="tdc_SupplementalBalanceSheetInformationTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="SupplementalFinancialInformationTextBlock" id="tdc_SupplementalFinancialInformationTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TaxBenefitFromAuditSettlement" id="tdc_TaxBenefitFromAuditSettlement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TaxBenefitFromSubsequentEventNewTaxLaw" id="tdc_TaxBenefitFromSubsequentEventNewTaxLaw" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TaxCreditCarryforwardsNotRecognizedAsDeferredTaxAssetsOnBalanceSheet" id="tdc_TaxCreditCarryforwardsNotRecognizedAsDeferredTaxAssetsOnBalanceSheet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TaxCreditCarryforwardsRecognizedAsDeferredTaxAssetsOnBalanceSheet" id="tdc_TaxCreditCarryforwardsRecognizedAsDeferredTaxAssetsOnBalanceSheet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TermOfLoan" id="tdc_TermOfLoan" type="xbrli:positiveIntegerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TradeAccountsReceivable" id="tdc_TradeAccountsReceivable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="TreasuryStockPolicyTextBlock" id="tdc_TreasuryStockPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="UncertainTaxPositionsRecognizedAsNoncurrentLiabilityOnBalanceSheet" id="tdc_UncertainTaxPositionsRecognizedAsNoncurrentLiabilityOnBalanceSheet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="UncertainTaxPositionsRelatedToBusinessAcquisitionsNotRecognizedOnBalanceSheet" id="tdc_UncertainTaxPositionsRelatedToBusinessAcquisitionsNotRecognizedOnBalanceSheet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="UnitedStatesAndCertainForeignJurisdictionsMember" id="tdc_UnitedStatesAndCertainForeignJurisdictionsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="UnitedStatesMember" id="tdc_UnitedStatesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="UnitedStatesSavingsPlanCostMember" id="tdc_UnitedStatesSavingsPlanCostMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="UnrecognizedTaxBenefitsIncreasesResultingFromBusinessAcquisitions" id="tdc_UnrecognizedTaxBenefitsIncreasesResultingFromBusinessAcquisitions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
</schema>
