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  <xs:element id="cna_ScheduleOfAvailableForSaleAndTradingSecuritiesTable" abstract="true" name="ScheduleOfAvailableForSaleAndTradingSecuritiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cna_CNAEuropeMember" abstract="true" name="CNAEuropeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_OperatingIncomeLossFromContinuingOperationsBeforeIncomeTax" abstract="false" name="OperatingIncomeLossFromContinuingOperationsBeforeIncomeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAmortizationOfDiscount" abstract="false" name="LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAmortizationOfDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_ReductionOfNetUnrealizedGainsOnInvestmentsIncludedInAOCIDueToShadowAdjustments" abstract="false" name="ReductionOfNetUnrealizedGainsOnInvestmentsIncludedInAOCIDueToShadowAdjustments" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_TotalConsiderationPaidToNICOUnderAEPLossPortfolioTransfer" abstract="false" name="TotalConsiderationPaidToNICOUnderAEPLossPortfolioTransfer" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_FairValueOfCollateralTrustAccountEstablishedByNICOUnderAEPLossPortfolioTransfer" abstract="false" name="FairValueOfCollateralTrustAccountEstablishedByNICOUnderAEPLossPortfolioTransfer" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_CumulativeAmountsCededUnderAEPLossPortfolioTransfer" abstract="false" name="CumulativeAmountsCededUnderAEPLossPortfolioTransfer" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_InternationalSegmentMember" abstract="true" name="InternationalSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_ChangeInShortTermInvestments" abstract="false" name="ChangeInShortTermInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_InvestmentsAndDerivativesRealizedGainLoss" abstract="false" name="InvestmentsAndDerivativesRealizedGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_CommercialSegmentMember" abstract="true" name="CommercialSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_LimitedPartnershipInvestments" abstract="false" name="LimitedPartnershipInvestments" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_NetInvestmentIncomeAndGainsLossesOnTradingSecurities" abstract="false" name="NetInvestmentIncomeAndGainsLossesOnTradingSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_DebtServiceCoverageRatioGreaterThanOrEqualto1.6Member" abstract="true" name="DebtServiceCoverageRatioGreaterThanOrEqualto1.6Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsAndOtherComprehensiveIncomeLoss" abstract="false" name="FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsAndOtherComprehensiveIncomeLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_DebtToValueRatioEqualTo55To65PercentMember" abstract="true" name="DebtToValueRatioEqualTo55To65PercentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_LegalProceedingsCommitmentsAndContingenciesAndGuaranteesTextBlock" abstract="false" name="LegalProceedingsCommitmentsAndContingenciesAndGuaranteesTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cna_CNACanadaMember" abstract="true" name="CNACanadaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_PretaxFavorableUnfavorablePremiumDevelopmentExcludingLifeGroup" abstract="false" name="PretaxFavorableUnfavorablePremiumDevelopmentExcludingLifeGroup" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_ExternalCreditRatingAAAMember" abstract="true" name="ExternalCreditRatingAAAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_OtherInvestedAssetsOverseasDeposit" abstract="false" name="OtherInvestedAssetsOverseasDeposit" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_InsuranceReservesAbstract" abstract="true" name="InsuranceReservesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cna_DebtToValueRatioLessThan55PercentMember" abstract="true" name="DebtToValueRatioLessThan55PercentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_TradingPortfolioSecuritiesMember" abstract="true" name="TradingPortfolioSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_RetroactiveReinsuranceBenefitRecognized" abstract="false" name="RetroactiveReinsuranceBenefitRecognized" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_MarketableSecuritiesFixedMaturitiesAllowanceForCreditLoss" abstract="false" name="MarketableSecuritiesFixedMaturitiesAllowanceForCreditLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_NetReinsuranceReceivablesTransferredToNICOUnderAEPLossPortfolioTransfer" abstract="false" name="NetReinsuranceReceivablesTransferredToNICOUnderAEPLossPortfolioTransfer" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_Insuranceclaimsandpolicyholdersbenefitsincludingpolicyholdersdividends" abstract="false" name="Insuranceclaimsandpolicyholdersbenefitsincludingpolicyholdersdividends" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_WarrantyAlternativeRisksMember" abstract="true" name="WarrantyAlternativeRisksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_PretaxFavorableUnfavorableNetPriorYearClaimAndAllocatedClaimAdjustmentExpenseReserveDevelopmentExcludingLifeGroup" abstract="false" name="PretaxFavorableUnfavorableNetPriorYearClaimAndAllocatedClaimAdjustmentExpenseReserveDevelopmentExcludingLifeGroup" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_OtherInsuranceRelatedExpenses" abstract="false" name="OtherInsuranceRelatedExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_NetPriorYearClaimAndAllocatedClaimAdjustmentExpenseReserveAndPremiumDevelopmentTableTextBlock" abstract="false" name="NetPriorYearClaimAndAllocatedClaimAdjustmentExpenseReserveAndPremiumDevelopmentTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cna_NetPriorYearClaimAndAllocatedClaimAdjustmentExpenseReserveDevelopmentCommercialAuto" abstract="false" name="NetPriorYearClaimAndAllocatedClaimAdjustmentExpenseReserveDevelopmentCommercialAuto" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_CommitmentsToSellVariousPrivatelyPlacedDebtSecurities" abstract="false" name="CommitmentsToSellVariousPrivatelyPlacedDebtSecurities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_SpecialtySegmentMember" abstract="true" name="SpecialtySegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_DebtServiceCoverageAxis" abstract="true" name="DebtServiceCoverageAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="cna_DebtServiceCoverageRatioBetween1.2And1.6Member" abstract="true" name="DebtServiceCoverageRatioBetween1.2And1.6Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseStructuredSettlementObligationsPeriodIncreaseDecrease" abstract="false" name="LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseStructuredSettlementObligationsPeriodIncreaseDecrease" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedinNetInvestmentIncome" abstract="false" name="FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedinNetInvestmentIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_ExternalCreditRatingBBBMember" abstract="true" name="ExternalCreditRatingBBBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_CostsFromContractWithCustomers" abstract="false" name="CostsFromContractWithCustomers" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_NetIncurredClaimandClaimAdjustmentExpenseLineItems" abstract="true" name="NetIncurredClaimandClaimAdjustmentExpenseLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cna_NetRealizedInvestmentGainsLossesContinuingAndDiscontinuingOperations" abstract="false" name="NetRealizedInvestmentGainsLossesContinuingAndDiscontinuingOperations" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_FundsWithheldLiabilitySecuritiesMember" abstract="true" name="FundsWithheldLiabilitySecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_CoreSegmentsSpecialtyCommercialAndInternationalMember" abstract="true" name="CoreSegmentsSpecialtyCommercialAndInternationalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_LegalProceedingsCommitmentsandContingenciesandGuaranteesLineItems" abstract="true" name="LegalProceedingsCommitmentsandContingenciesandGuaranteesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cna_ChangeInOtherInvestments" abstract="false" name="ChangeInOtherInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_NetPriorYearClaimAndAllocatedClaimAdjustmentExpenseReserveCommercial" abstract="false" name="NetPriorYearClaimAndAllocatedClaimAdjustmentExpenseReserveCommercial" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_NetIncurredClaimandClaimAdjustmentExpenseTable" abstract="true" name="NetIncurredClaimandClaimAdjustmentExpenseTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cna_ExternalCreditRatingAAMember" abstract="true" name="ExternalCreditRatingAAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_HurricaneIanMember" abstract="true" name="HurricaneIanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
