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  <xs:element id="ipg_SegmentGeographicalGroupsOfCountriesGroupFiveMember" abstract="true" name="SegmentGeographicalGroupsOfCountriesGroupFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
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  <xs:element id="ipg_CashPaidForCurrentAndPriorYearsAcquisitionsTableTextBlock" abstract="false" name="CashPaidForCurrentAndPriorYearsAcquisitionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ipg_OperatingLeasesFutureMinimumPaymentsGrossRentDueInTwoYears" abstract="false" name="OperatingLeasesFutureMinimumPaymentsGrossRentDueInTwoYears" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_A364DayMember" abstract="true" name="A364DayMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_Averageamountborrowedundercommercialpaperduringtheperiod" abstract="false" name="Averageamountborrowedundercommercialpaperduringtheperiod" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_AssetsandLiabilitiesMeasuredatFairValueonRecurringBasisAbstract" abstract="true" name="AssetsandLiabilitiesMeasuredatFairValueonRecurringBasisAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
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  <xs:element id="ipg_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueThereafter" abstract="false" name="OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueThereafter" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_NetCashActivitiesForOperatingLeaseRightOfUseAssetAndLeaseLiabilitiesIncludedInOtherNonCurrentAssetsAndLiabilitiesUnderOperatingActivities" abstract="false" name="NetCashActivitiesForOperatingLeaseRightOfUseAssetAndLeaseLiabilitiesIncludedInOtherNonCurrentAssetsAndLiabilitiesUnderOperatingActivities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_ProceedsfromStockOptionsExercisedincludingTaxesWithheld" abstract="false" name="ProceedsfromStockOptionsExercisedincludingTaxesWithheld" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ipg_NetimpactoftheTaxAct" abstract="false" name="NetimpactoftheTaxAct" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ipg_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsCurrent" abstract="false" name="OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_FairValueOfPensionPlanAssetsTableTextBlock" abstract="false" name="FairValueOfPensionPlanAssetsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ipg_InterestCreditingRateUsedtoCalculateObligation" abstract="false" name="InterestCreditingRateUsedtoCalculateObligation" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="ipg_InterestIncomeDepositsWithFinancialInstitutionsAcquiree" abstract="false" name="InterestIncomeDepositsWithFinancialInstitutionsAcquiree" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ipg_GuaranteeObligationsCurrentCarryingValueLeases" abstract="false" name="GuaranteeObligationsCurrentCarryingValueLeases" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_TaxWithheldonStockOptionsReceived" abstract="false" name="TaxWithheldonStockOptionsReceived" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_CommittedCreditFacilityMember" abstract="true" name="CommittedCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_PerformanceBasedAwardsMember" abstract="true" name="PerformanceBasedAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_IncentiveCompensationExpenseNonShareBased" abstract="false" name="IncentiveCompensationExpenseNonShareBased" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_ScheduleOfUnrecognizedTaxBenefitsActivityTableTextBlock" abstract="false" name="ScheduleOfUnrecognizedTaxBenefitsActivityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ipg_TotalplanassetssubjecttolevelingMember" abstract="true" name="TotalplanassetssubjecttolevelingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_NoncashItemsMember" abstract="true" name="NoncashItemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
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  <xs:element id="ipg_StockSettledAwardsMember" abstract="true" name="StockSettledAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_LeaseholdImprovementsUsefulLife" abstract="false" name="LeaseholdImprovementsUsefulLife" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_ChangesinAccumulatedComprehensiveLossnetoftaxAbstract" abstract="true" name="ChangesinAccumulatedComprehensiveLossnetoftaxAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_InvestmentFundMember" abstract="true" name="InvestmentFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_SegmentInternationalDomain" abstract="true" name="SegmentInternationalDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_UnrecognizedLossesTransitionObligationAndPriorServiceCostAbstract" abstract="true" name="UnrecognizedLossesTransitionObligationAndPriorServiceCostAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_InvestmentsmeasuredatnetassetvalueMember" abstract="true" name="InvestmentsmeasuredatnetassetvalueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_InterestCreditingRateUsedToCalculateNetPeriodicCost" abstract="false" name="InterestCreditingRateUsedToCalculateNetPeriodicCost" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="ipg_UnsecuredDebt5.40NotesMember" abstract="true" name="UnsecuredDebt5.40NotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_AllowanceForDoubtfulAccountsForeignCurrencyTranslationAdjustment" abstract="false" name="AllowanceForDoubtfulAccountsForeignCurrencyTranslationAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ipg_InterestExpenseAcquiree" abstract="false" name="InterestExpenseAcquiree" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_DomesticPensionPlanDiscountRate" abstract="false" name="DomesticPensionPlanDiscountRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="ipg_Reversalofvaluationallowance" abstract="false" name="Reversalofvaluationallowance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ipg_LineofCreditFacilityLimitsonLettersofCredit" abstract="false" name="LineofCreditFacilityLimitsonLettersofCredit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ipg_CashSettledAwardsMember" abstract="true" name="CashSettledAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_EBITA" abstract="false" name="EBITA" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ipg_OperatingLeasesFutureMinimumPaymentsGrossRentDueInThreeYears" abstract="false" name="OperatingLeasesFutureMinimumPaymentsGrossRentDueInThreeYears" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_OperatingLeasesFutureMinimumPaymentsGrossRentDueInFiveYears" abstract="false" name="OperatingLeasesFutureMinimumPaymentsGrossRentDueInFiveYears" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_NoncontrollingInterestRelatedToRedeemableNoncontrollingInterests" abstract="false" name="NoncontrollingInterestRelatedToRedeemableNoncontrollingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ipg_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueInFourYears" abstract="false" name="OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueInFourYears" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_PropertyandEquipmentAbstract" abstract="true" name="PropertyandEquipmentAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_RedeemableNoncontrollingInterestsAndCallOptionsWithAffiliatesMember" abstract="true" name="RedeemableNoncontrollingInterestsAndCallOptionsWithAffiliatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_MaximumLeaseTermforLeasesThatHaveNotYetCommenced" abstract="false" name="MaximumLeaseTermforLeasesThatHaveNotYetCommenced" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ipg_RedeemableAtNoncontrollingEquityOwnersDiscretionMember" abstract="true" name="RedeemableAtNoncontrollingEquityOwnersDiscretionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_Discountratefloorlongtermdebt" abstract="false" name="Discountratefloorlongtermdebt" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="ipg_AnnualRateForFrontingFeesAccruedOnLettersOfCredit" abstract="false" name="AnnualRateForFrontingFeesAccruedOnLettersOfCredit" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
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  <xs:element id="ipg_AssetsPledgedAsSecurityForParentCompanyGuarantees" abstract="false" name="AssetsPledgedAsSecurityForParentCompanyGuarantees" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ipg_ScheduleofNewDebtIssuanceLineItems" abstract="true" name="ScheduleofNewDebtIssuanceLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
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  <xs:element id="ipg_PaymentstoAcquireBusinessesGrossCurrentYearAcquisitions" abstract="false" name="PaymentstoAcquireBusinessesGrossCurrentYearAcquisitions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ipg_ShareRepurchaseProgramAbstract" abstract="true" name="ShareRepurchaseProgramAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansOtherBeforeTax" abstract="false" name="OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansOtherBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_ValuationAllowanceDeferredTaxAssetChangeInAmountChargedReversedToGrossTaxAssetsAndOtherAccounts" abstract="false" name="ValuationAllowanceDeferredTaxAssetChangeInAmountChargedReversedToGrossTaxAssetsAndOtherAccounts" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ipg_OtherNonoperatingIncomeExpenseAcquiree" abstract="false" name="OtherNonoperatingIncomeExpenseAcquiree" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ipg_RestructuringActionsTakenWithinForeignSubsidiariesMember" abstract="true" name="RestructuringActionsTakenWithinForeignSubsidiariesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_CapitalizedInternalUseSoftwareUsefulLife" abstract="false" name="CapitalizedInternalUseSoftwareUsefulLife" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_DebtTransactionsAbstract" abstract="true" name="DebtTransactionsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_MaximumRemainingLeaseTerm" abstract="false" name="MaximumRemainingLeaseTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ipg_CashAwardsGrantedDuringPeriodTargetValue" abstract="false" name="CashAwardsGrantedDuringPeriodTargetValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_AcxiomMember" abstract="true" name="AcxiomMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_UnsecuredDebt3.75NoteDuein2021Member" abstract="true" name="UnsecuredDebt3.75NoteDuein2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_OperatingLeasesFutureMinimumPaymentsDueGrossRent" abstract="false" name="OperatingLeasesFutureMinimumPaymentsDueGrossRent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_RedeemableNoncontrollingInterestsRedemptionValueAdjustments" abstract="false" name="RedeemableNoncontrollingInterestsRedemptionValueAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_LineofCreditFacilityAvailableCapacityIncreaseAmount" abstract="false" name="LineofCreditFacilityAvailableCapacityIncreaseAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_ScheduleOfFinancialCovenantsInCreditAgreementTableTextBlock" abstract="false" name="ScheduleOfFinancialCovenantsInCreditAgreementTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ipg_OtherPlanAssetsMember" abstract="true" name="OtherPlanAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_LeverageRatioAcquisitionPriceThreshold" abstract="false" name="LeverageRatioAcquisitionPriceThreshold" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueInTwoYears" abstract="false" name="OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueInTwoYears" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_CashDebtPoolingArrangementsAmountNetted" abstract="false" name="CashDebtPoolingArrangementsAmountNetted" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_LeverageRatioMaximum" abstract="false" name="LeverageRatioMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_UnsecuredDebt3.75NoteDuein2023Member" abstract="true" name="UnsecuredDebt3.75NoteDuein2023Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_OperatingLeaseLiabilityLeasesNotCommenced" abstract="false" name="OperatingLeaseLiabilityLeasesNotCommenced" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_PaymenttoAcquireBusinessesGrossPriorYearAcquisitions" abstract="false" name="PaymenttoAcquireBusinessesGrossPriorYearAcquisitions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_NumberOfReportingUnitsForPurposesOfAnnualGoodwillImpairmentTest" abstract="false" name="NumberOfReportingUnitsForPurposesOfAnnualGoodwillImpairmentTest" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ipg_CashPaymentsMember" abstract="true" name="CashPaymentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_Discountrateceilingcontingentacquisitionobligations" abstract="false" name="Discountrateceilingcontingentacquisitionobligations" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="ipg_ScheduleofLineofCreditFacilityAbstract" abstract="true" name="ScheduleofLineofCreditFacilityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_DepreciationandAmortizationExcludingAcquiredIntangibles" abstract="false" name="DepreciationandAmortizationExcludingAcquiredIntangibles" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_DebtIssuanceFaceAmount" abstract="false" name="DebtIssuanceFaceAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_BuildingsUsefulLife" abstract="false" name="BuildingsUsefulLife" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ipg_SellingGeneralAndAdministrativeExpenseAcquiree" abstract="false" name="SellingGeneralAndAdministrativeExpenseAcquiree" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_PayablesPolicyPolicyTextBlock" abstract="false" name="PayablesPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ipg_DividendsPaidForStockSettledAwards" abstract="false" name="DividendsPaidForStockSettledAwards" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_TotalReclassificationfromAOCI" abstract="false" name="TotalReclassificationfromAOCI" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_OtherComprehensiveIncomeLossAbstract" abstract="true" name="OtherComprehensiveIncomeLossAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_UnsecuredDebt475SeniorNotesMember" abstract="true" name="UnsecuredDebt475SeniorNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_ChangesInNonUSTaxLawMember" abstract="true" name="ChangesInNonUSTaxLawMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_ContingentAcquisitionObligationsAxis" abstract="true" name="ContingentAcquisitionObligationsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ipg_OperatingLeasesFutureMinimumPaymentsGrossRentDueThereafter" abstract="false" name="OperatingLeasesFutureMinimumPaymentsGrossRentDueThereafter" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_DefinedContributionPlansParticipantForfeituresMember" abstract="true" name="DefinedContributionPlansParticipantForfeituresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_OperatingLeasesFutureMinimumPaymentsDueGrossRentCurrent" abstract="false" name="OperatingLeasesFutureMinimumPaymentsDueGrossRentCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_ValuationandQualifyingAccountsAllowanceforUncollectibleAccountsAbstract" abstract="true" name="ValuationandQualifyingAccountsAllowanceforUncollectibleAccountsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_UncommittedCreditFacilityMember" abstract="true" name="UncommittedCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_AlternativeInvestmentsMember" abstract="true" name="AlternativeInvestmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_AwardVestingPeriod" abstract="false" name="AwardVestingPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="us-types:durationStringItemType"/>
  <xs:element id="ipg_ValuationAllowanceDeferredTaxAssetChangeInAmountChargedReversedToCostsAndExpenses" abstract="false" name="ValuationAllowanceDeferredTaxAssetChangeInAmountChargedReversedToCostsAndExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_IncomeLossfromContinuingOperationsbeforeEquityMethodInvestmentsandNoncontrollingInterest" abstract="false" name="IncomeLossfromContinuingOperationsbeforeEquityMethodInvestmentsandNoncontrollingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_AllocationOfPlanAssetsLineItems" abstract="true" name="AllocationOfPlanAssetsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_MarginForEurocurrencyRateAdvances" abstract="false" name="MarginForEurocurrencyRateAdvances" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="ipg_UnsecuredDebt475NotesMember" abstract="true" name="UnsecuredDebt475NotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_OfficeAndRelatedExpensesCurrent" abstract="false" name="OfficeAndRelatedExpensesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_DefinedContributionPlanDomain" abstract="true" name="DefinedContributionPlanDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_DeferredTaxAssets" abstract="false" name="DeferredTaxAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_Changeinoperatingleaserightofuseassetandleaseliabilities" abstract="false" name="Changeinoperatingleaserightofuseassetandleaseliabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_RecoveryofDirectCostsExpenses" abstract="false" name="RecoveryofDirectCostsExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAwardValuePerEmployee" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAwardValuePerEmployee" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ipg_ShareRepurchaseProgramTableTextBlock" abstract="false" name="ShareRepurchaseProgramTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ipg_LeaseimpairmentcostsMember" abstract="true" name="LeaseimpairmentcostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_DeferredTaxLiabilitiesByJurisdiction" abstract="false" name="DeferredTaxLiabilitiesByJurisdiction" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_MinimumRemainingLeaseTerm" abstract="false" name="MinimumRemainingLeaseTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ipg_TotalContingentAcquisitionPaymentsMember" abstract="true" name="TotalContingentAcquisitionPaymentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_WeightedaveragenumberofsharesoutstandingbasicanddilutedAbstract" abstract="true" name="WeightedaveragenumberofsharesoutstandingbasicanddilutedAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_SegmentDomesticDomain" abstract="true" name="SegmentDomesticDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_DXTRASegmentMember" abstract="true" name="DXTRASegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_ScheduleofNewDebtIssuanceTable" abstract="true" name="ScheduleofNewDebtIssuanceTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ipg_AccumulatedOtherComprehensiveLossAbstract" abstract="true" name="AccumulatedOtherComprehensiveLossAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_CashAwardbyCompensationArrangementMaximumAwardValuePerEmployee" abstract="false" name="CashAwardbyCompensationArrangementMaximumAwardValuePerEmployee" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_ValuationAllowanceDeferredTaxAssetChangeinAmountChargedReversedtoForeigncurrencytranslation" abstract="false" name="ValuationAllowanceDeferredTaxAssetChangeinAmountChargedReversedtoForeigncurrencytranslation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_ShareRepurchaseProgramThreeMemberDomain" abstract="true" name="ShareRepurchaseProgramThreeMemberDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ipg_DeiAbstract" abstract="true" name="DeiAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueInFiveYears" abstract="false" name="OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueInFiveYears" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_SupplementaryDataAbstract" abstract="true" name="SupplementaryDataAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ipg_DeferredTaxLiabilitiesROU" abstract="false" name="DeferredTaxLiabilitiesROU" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ipg_CashPaidforAcquisitionsAbstract" abstract="true" name="CashPaidforAcquisitionsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
</xs:schema>
