<?xml version="1.0" encoding="utf-8"?>
<presentation xmlns:o="urn:schemas-microsoft-com:office:office"
              xmlns:x="urn:schemas-microsoft-com:office:excel"
              xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet">
   <extended-link uri="http://www.ace.com/role/ConsolidatedBalanceSheets"
                  definition="000010 - Statement - Consolidated Balance Sheets">
      <concept id="us-gaap_StatementOfFinancialPositionAbstract" prefix="us-gaap"
               qname="us-gaap:StatementOfFinancialPositionAbstract"
               label="Consolidated Balance Sheets"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="us-gaap_AssetsAbstract" prefix="us-gaap" qname="us-gaap:AssetsAbstract"
                  label="Assets"
                  substitution-group="xbrli:item"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="us-gaap_InvestmentsAbstract" prefix="us-gaap"
                     qname="us-gaap:InvestmentsAbstract"
                     label="Investments:"
                     substitution-group="xbrli:item"
                     data-type="xbrli:stringItemType"
                     xbrl-data-type="xbrli:stringItemType"
                     abstract="true"
                     period-type="duration">
               <concept id="us-gaap_AvailableForSaleSecuritiesDebtSecurities" prefix="us-gaap"
                        qname="us-gaap:AvailableForSaleSecuritiesDebtSecurities"
                        label="Fixed maturities available for sale, at fair value (amortized cost - $38,004 and $33,109) (includes hybrid financial instruments of $341 and $239)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="instant"/>
               <concept id="us-gaap_HeldToMaturitySecurities" prefix="us-gaap"
                        qname="us-gaap:HeldToMaturitySecurities"
                        label="Fixed maturities held to maturity, at amortized cost (fair value - $3,532 and $2,865)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="instant"/>
               <concept id="us-gaap_AvailableForSaleSecuritiesEquitySecurities" prefix="us-gaap"
                        qname="us-gaap:AvailableForSaleSecuritiesEquitySecurities"
                        label="Equity securities, at fair value (cost - $492 and $1,132)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="instant"/>
               <concept id="us-gaap_OtherShortTermInvestments" prefix="us-gaap"
                        qname="us-gaap:OtherShortTermInvestments"
                        label="Short-term investments, at fair value (amortized cost - $1,852 and $3,350)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="instant"/>
               <concept id="us-gaap_OtherLongTermInvestments" prefix="us-gaap"
                        qname="us-gaap:OtherLongTermInvestments"
                        label="Other investments (cost - $1,279 and $1,368)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="instant"/>
               <concept id="us-gaap_Investments" prefix="us-gaap" qname="us-gaap:Investments"
                        label="Total investments"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="instant"/>
            </concept>
            <concept id="us-gaap_CashAndCashEquivalentsAtCarryingValue" prefix="us-gaap"
                     qname="us-gaap:CashAndCashEquivalentsAtCarryingValue"
                     label="Cash"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_SecuritiesHeldAsCollateralAtFairValue" prefix="us-gaap"
                     qname="us-gaap:SecuritiesHeldAsCollateralAtFairValue"
                     label="Securities lending collateral"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_AccruedInvestmentIncomeReceivable" prefix="us-gaap"
                     qname="us-gaap:AccruedInvestmentIncomeReceivable"
                     label="Accrued investment income"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_PremiumsReceivableAtCarryingValue" prefix="us-gaap"
                     qname="us-gaap:PremiumsReceivableAtCarryingValue"
                     label="Insurance and reinsurance balances receivable"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="ace_ReinsuranceRecoverableLossesAndLossExpenses" prefix="ace"
                     qname="ace:ReinsuranceRecoverableLossesAndLossExpenses"
                     label="Reinsurance recoverable on losses and loss expenses"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="ace_ReinsuranceRecoverableFuturePolicyBenefits" prefix="ace"
                     qname="ace:ReinsuranceRecoverableFuturePolicyBenefits"
                     label="Reinsurance recoverable on policy benefits"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_DeferredPolicyAcquisitionCosts" prefix="us-gaap"
                     qname="us-gaap:DeferredPolicyAcquisitionCosts"
                     label="Deferred policy acquisition costs"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_ValueOfBusinessAcquiredVOBA" prefix="us-gaap"
                     qname="us-gaap:ValueOfBusinessAcquiredVOBA"
                     label="Value of business acquired"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_PrepaidReinsurancePremiums" prefix="us-gaap"
                     qname="us-gaap:PrepaidReinsurancePremiums"
                     label="Prepaid reinsurance premiums"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="ace_GoodwillAndIntangibles" prefix="ace" qname="ace:GoodwillAndIntangibles"
                     label="Goodwill and other intangible assets"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_DeferredTaxAssetsNet" prefix="us-gaap"
                     qname="us-gaap:DeferredTaxAssetsNet"
                     label="Deferred tax assets"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures"
                     prefix="us-gaap"
                     qname="us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures"
                     label="Investments in partially-owned insurance companies (cost - $374 and $737)"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_OtherAssets" prefix="us-gaap" qname="us-gaap:OtherAssets"
                     label="Other assets"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_Assets" prefix="us-gaap" qname="us-gaap:Assets"
                     label="Total assets"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
         </concept>
         <concept id="us-gaap_LiabilitiesAbstract" prefix="us-gaap"
                  qname="us-gaap:LiabilitiesAbstract"
                  label="Liabilities"
                  substitution-group="xbrli:item"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedAndIncurredButNotReportedIBNRClaims"
                     prefix="us-gaap"
                     qname="us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedAndIncurredButNotReportedIBNRClaims"
                     label="Unpaid losses and loss expenses"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_UnearnedPremiums" prefix="us-gaap" qname="us-gaap:UnearnedPremiums"
                     label="Unearned premiums"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_LiabilityForFuturePolicyBenefits" prefix="us-gaap"
                     qname="us-gaap:LiabilityForFuturePolicyBenefits"
                     label="Future policy benefits"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_ReinsurancePayable" prefix="us-gaap"
                     qname="us-gaap:ReinsurancePayable"
                     label="Insurance and reinsurance balances payable"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_PolicyholderContractDeposits" prefix="us-gaap"
                     qname="us-gaap:PolicyholderContractDeposits"
                     label="Deposit liabilities"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_ObligationToReturnSecuritiesReceivedAsCollateral" prefix="us-gaap"
                     qname="us-gaap:ObligationToReturnSecuritiesReceivedAsCollateral"
                     label="Securities lending payable"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_PayablesToBrokerDealersAndClearingOrganizations" prefix="us-gaap"
                     qname="us-gaap:PayablesToBrokerDealersAndClearingOrganizations"
                     label="Payable for securities purchased"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent"
                     prefix="us-gaap"
                     qname="us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent"
                     label="Accounts payable, accrued expenses, and other liabilities"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_AccruedIncomeTaxes" prefix="us-gaap"
                     qname="us-gaap:AccruedIncomeTaxes"
                     label="Income taxes payable"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="ace_ShortTermDebt" prefix="ace" qname="ace:ShortTermDebt"
                     label="Short-term debt"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_LongTermDebt" prefix="us-gaap" qname="us-gaap:LongTermDebt"
                     label="Long-term debt"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="ace_TrustPreferredSecurities" prefix="ace"
                     qname="ace:TrustPreferredSecurities"
                     label="Trust preferred securities"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_Liabilities" prefix="us-gaap" qname="us-gaap:Liabilities"
                     label="Total liabilities"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
         </concept>
         <concept id="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract"
                  prefix="us-gaap"
                  qname="us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract"
                  label="Shareholders' equity:"
                  substitution-group="xbrli:item"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="us-gaap_CommonStockValue" prefix="us-gaap" qname="us-gaap:CommonStockValue"
                     label="Common Shares (CHF 32.20 and CHF 33.14 par value, 337,770,064 and 335,413,501 shares issued, 336,280,476 and 333,645,471 shares outstanding disclosed)"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_TreasuryStockValue" prefix="us-gaap"
                     qname="us-gaap:TreasuryStockValue"
                     label="Common Shares in treasury (1,489,588 and 1,768,030 shares)"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_AdditionalPaidInCapital" prefix="us-gaap"
                     qname="us-gaap:AdditionalPaidInCapital"
                     label="Additional paid-in capital"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_RetainedEarningsAccumulatedDeficit" prefix="us-gaap"
                     qname="us-gaap:RetainedEarningsAccumulatedDeficit"
                     label="Retained earnings"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_DeferredCompensationEquity" prefix="us-gaap"
                     qname="us-gaap:DeferredCompensationEquity"
                     label="Deferred compensation obligation"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" prefix="us-gaap"
                     qname="us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax"
                     label="Accumulated other comprehensive income (loss)"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_UnearnedESOPShares" prefix="us-gaap"
                     qname="us-gaap:UnearnedESOPShares"
                     label="Common shares issued to employee trust"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"
                     prefix="us-gaap"
                     qname="us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"
                     label="Total shareholders' equity"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
            <concept id="us-gaap_LiabilitiesAndStockholdersEquity" prefix="us-gaap"
                     qname="us-gaap:LiabilitiesAndStockholdersEquity"
                     label="Total liabilities and shareholders' equity"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="instant"/>
         </concept>
      </concept>
   </extended-link>
   <extended-link uri="http://www.ace.com/role/ConsolidatedBalanceSheetPar"
                  definition="000015 - Statement - Consolidated Balance Sheets (Parentheticals)">
      <concept id="ace_ConsolidatedBalanceSheetsParentheticalDisclosures" prefix="ace"
               qname="ace:ConsolidatedBalanceSheetsParentheticalDisclosures"
               label="Consolidated balance sheets parenthetical disclosures"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="ace_ConsolidatedBalanceSheetAssetsParentheticalDisclosures" prefix="ace"
                  qname="ace:ConsolidatedBalanceSheetAssetsParentheticalDisclosures"
                  label="Consolidated balance sheets - assets - parenthetical disclosures"
                  substitution-group="xbrli:item"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost"
                     prefix="us-gaap"
                     qname="us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost"
                     label="Fixed maturities available for sale, at amortized cost"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_HybridInstrumentsAtFairValueNet" prefix="us-gaap"
                     qname="us-gaap:HybridInstrumentsAtFairValueNet"
                     label="Fixed maturities available for sale, hybrid financial instruments"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="us-gaap_HeldToMaturitySecuritiesFairValue" prefix="us-gaap"
                     qname="us-gaap:HeldToMaturitySecuritiesFairValue"
                     label="Fixed maturities held to maturity, at fair value"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="ace_AvailableForSaleSecuritiesEquitySecuritiesCost" prefix="ace"
                     qname="ace:AvailableForSaleSecuritiesEquitySecuritiesCost"
                     label="Equity securities, at cost"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="ace_OtherShortTermInvestmentsAtAmortizedCost" prefix="ace"
                     qname="ace:OtherShortTermInvestmentsAtAmortizedCost"
                     label="Short-term investments, at amortized cost"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="ace_OtherInvestmentsAndSecurities" prefix="ace"
                     qname="ace:OtherInvestmentsAndSecurities"
                     label="Other investments, at cost"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
            <concept id="ace_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesAtCost"
                     prefix="ace"
                     qname="ace:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesAtCost"
                     label="Investments in partially-owned insurance companies, at cost"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
         </concept>
         <concept id="ace_ConsolidatedBalanceSheetEquityParentheticalDisclosures" prefix="ace"
                  qname="ace:ConsolidatedBalanceSheetEquityParentheticalDisclosures"
                  label="Consolidated balance sheets - equity - parenthetical disclosures"
                  substitution-group="xbrli:item"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="us-gaap_CommonStockSharesIssued" prefix="us-gaap"
                     qname="us-gaap:CommonStockSharesIssued"
                     label="Common Shares - shares issued"
                     substitution-group="xbrli:item"
                     data-type="xbrli:sharesItemType"
                     xbrl-data-type="xbrli:sharesItemType"
                     abstract="false"
                     period-type="instant"/>
            <concept id="us-gaap_CommonStockSharesOutstanding" prefix="us-gaap"
                     qname="us-gaap:CommonStockSharesOutstanding"
                     label="Common Shares - shares outstanding"
                     substitution-group="xbrli:item"
                     data-type="xbrli:sharesItemType"
                     xbrl-data-type="xbrli:sharesItemType"
                     abstract="false"
                     period-type="instant"/>
            <concept id="us-gaap_TreasuryStockShares" prefix="us-gaap"
                     qname="us-gaap:TreasuryStockShares"
                     label="Common Shares in treasury - shares"
                     substitution-group="xbrli:item"
                     data-type="xbrli:sharesItemType"
                     xbrl-data-type="xbrli:sharesItemType"
                     abstract="false"
                     period-type="instant"/>
         </concept>
      </concept>
   </extended-link>
   <extended-link uri="http://www.ace.com/role/CommonSharesParValueParentheticalsCHF"
                  definition="000016 - Statement - Consolidated Balance Sheets (Parentheticals in CHF)">
      <concept id="ace_CommonSharesParValueAbstract" prefix="ace"
               qname="ace:CommonSharesParValueAbstract"
               label="Common shares par value table"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="ace_CommonShareParValueTable" prefix="ace"
                  qname="ace:CommonShareParValueTable"
                  label="Common share par value in CHF"
                  substitution-group="xbrldt:hypercubeItem"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="ace_CommonShareParValueAxis" prefix="ace"
                     qname="ace:CommonShareParValueAxis"
                     label="Common share par value axis"
                     substitution-group="xbrldt:dimensionItem"
                     data-type="xbrli:stringItemType"
                     xbrl-data-type="xbrli:stringItemType"
                     abstract="true"
                     period-type="duration">
               <concept id="us-gaap_ClassOfStockDomain" prefix="us-gaap"
                        qname="us-gaap:ClassOfStockDomain"
                        label="Class of stock"
                        substitution-group="xbrli:item"
                        data-type="us-types:domainItemType"
                        xbrl-data-type="xbrli:stringItemType"
                        abstract="false"
                        period-type="duration">
                  <concept id="ace_CommonStockParValueMember" prefix="ace"
                           qname="ace:CommonStockParValueMember"
                           label="Common shares par value"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
               </concept>
            </concept>
            <concept id="us-gaap_CommonStockParOrStatedValuePerShare" prefix="us-gaap"
                     qname="us-gaap:CommonStockParOrStatedValuePerShare"
                     label="Common shares - par value"
                     substitution-group="xbrli:item"
                     data-type="us-types:perShareItemType"
                     xbrl-data-type="xbrli:decimalItemType"
                     abstract="false"
                     period-type="instant"/>
         </concept>
      </concept>
   </extended-link>
   <extended-link uri="http://www.ace.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncome"
                  definition="000020 - Statement - Consolidated Statements of Operations and Comprehensive Income">
      <concept id="us-gaap_IncomeStatementAbstract" prefix="us-gaap"
               qname="us-gaap:IncomeStatementAbstract"
               label="Consolidated Statements of Operations and Comprehensive Income"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="us-gaap_RevenuesAbstract" prefix="us-gaap" qname="us-gaap:RevenuesAbstract"
                  label="Revenue:"
                  substitution-group="xbrli:item"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="ace_GrossPremiumsWrittenDirectAndAssumed" prefix="ace"
                     qname="ace:GrossPremiumsWrittenDirectAndAssumed"
                     label="Gross premiums written"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_CededPremiumsWritten" prefix="us-gaap"
                     qname="us-gaap:CededPremiumsWritten"
                     label="Reinsurance premiums ceded"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_PremiumsWrittenNet" prefix="us-gaap"
                     qname="us-gaap:PremiumsWrittenNet"
                     label="Net premiums written"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="ace_ChangeInUnearnedPremiumNet" prefix="ace"
                     qname="ace:ChangeInUnearnedPremiumNet"
                     label="Change in unearned premiums"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_PremiumsEarnedNet" prefix="us-gaap"
                     qname="us-gaap:PremiumsEarnedNet"
                     label="Net premiums earned"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_InvestmentIncomeNet" prefix="us-gaap"
                     qname="us-gaap:InvestmentIncomeNet"
                     label="Net investment income"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="ace_NetRealizedGainsLossesAbstract" prefix="ace"
                     qname="ace:NetRealizedGainsLossesAbstract"
                     label="Net realized gains (losses):"
                     substitution-group="xbrli:item"
                     data-type="xbrli:stringItemType"
                     xbrl-data-type="xbrli:stringItemType"
                     abstract="true"
                     period-type="duration">
               <concept id="us-gaap_MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount"
                        prefix="us-gaap"
                        qname="us-gaap:MarketableSecuritiesRealizedGainLossOtherThanTemporaryImpairmentsAmount"
                        label="Other-than-temporary impairment (OTTI) losses, gross"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="ace_PortionOtherThanTemporaryLossesInAccumulatedOtherComprehensiveIncome"
                        prefix="ace"
                        qname="ace:PortionOtherThanTemporaryLossesInAccumulatedOtherComprehensiveIncome"
                        label="Portion of OTTI losses recognized in other comprehensive income"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="ace_NetOtherThanTemporaryImpairmentsRecognizedInNetIncome" prefix="ace"
                        qname="ace:NetOtherThanTemporaryImpairmentsRecognizedInNetIncome"
                        label="Net OTTI losses recognized in income"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="ace_NetRealizedGainsLossesExcludingOTTI" prefix="ace"
                        qname="ace:NetRealizedGainsLossesExcludingOTTI"
                        label="Net realized gains (losses) excluding OTTI losses"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="ace_NetRealizedGainsLosses" prefix="ace" qname="ace:NetRealizedGainsLosses"
                        label="Net realized gains (losses)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
            </concept>
            <concept id="us-gaap_Revenues" prefix="us-gaap" qname="us-gaap:Revenues"
                     label="Total revenues"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
         </concept>
         <concept id="us-gaap_OperatingExpensesAbstract" prefix="us-gaap"
                  qname="us-gaap:OperatingExpensesAbstract"
                  label="Expenses:"
                  substitution-group="xbrli:item"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="us-gaap_PolicyholderBenefitsAndClaimsIncurredNet" prefix="us-gaap"
                     qname="us-gaap:PolicyholderBenefitsAndClaimsIncurredNet"
                     label="Losses and loss expenses"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_LiabilityForFuturePolicyBenefitsPeriodExpense" prefix="us-gaap"
                     qname="us-gaap:LiabilityForFuturePolicyBenefitsPeriodExpense"
                     label="Policy benefits"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense" prefix="us-gaap"
                     qname="us-gaap:DeferredPolicyAcquisitionCostAmortizationExpense"
                     label="Policy acquisition costs"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_GeneralAndAdministrativeExpense" prefix="us-gaap"
                     qname="us-gaap:GeneralAndAdministrativeExpense"
                     label="Administrative expenses"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_InterestExpense" prefix="us-gaap" qname="us-gaap:InterestExpense"
                     label="Interest expense"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_OtherNonoperatingIncomeExpense" prefix="us-gaap"
                     qname="us-gaap:OtherNonoperatingIncomeExpense"
                     label="Other (income) expense"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_BenefitsLossesAndExpenses" prefix="us-gaap"
                     qname="us-gaap:BenefitsLossesAndExpenses"
                     label="Total expenses"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="ace_NetIncomeBeforeTax" prefix="ace" qname="ace:NetIncomeBeforeTax"
                     label="Net income before tax"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_IncomeTaxExpenseBenefit" prefix="us-gaap"
                     qname="us-gaap:IncomeTaxExpenseBenefit"
                     label="Income tax expense"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_NetIncomeLoss" prefix="us-gaap" qname="us-gaap:NetIncomeLoss"
                     label="Net income"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
         </concept>
         <concept id="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract"
                  prefix="us-gaap"
                  qname="us-gaap:OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract"
                  label="Other comprehensive income (loss):"
                  substitution-group="xbrli:item"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax"
                     prefix="us-gaap"
                     qname="us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax"
                     label="Unrealized (depreciation) appreciation"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax"
                     prefix="us-gaap"
                     qname="us-gaap:OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax"
                     label="Reclassification adjustment for net realized (gains) losses included in net income"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="ace_OtherComprehensiveIncomeLossSubtotal" prefix="ace"
                     qname="ace:OtherComprehensiveIncomeLossSubtotal"
                     label="Subtotal"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecrease"
                     prefix="us-gaap"
                     qname="us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecrease"
                     label="Cumulative translation adjustments"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     period-type="duration"/>
            <concept id="us-gaap_OtherComprehensiveIncomeMinimumPensionLiabilityNetAdjustmentBeforeTax"
                     prefix="us-gaap"
                     qname="us-gaap:OtherComprehensiveIncomeMinimumPensionLiabilityNetAdjustmentBeforeTax"
                     label="Pension liability"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecrease"
                     prefix="us-gaap"
                     qname="us-gaap:OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecrease"
                     label="Other comprehensive income (loss), before income tax"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     period-type="duration"/>
            <concept id="us-gaap_OtherComprehensiveIncomeLossTax" prefix="us-gaap"
                     qname="us-gaap:OtherComprehensiveIncomeLossTax"
                     label="Income tax (expense) benefit related to other comprehensive income items"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease"
                     prefix="us-gaap"
                     qname="us-gaap:OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease"
                     label="Other comprehensive income (loss)"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     period-type="duration"/>
            <concept id="ace_ComprehensiveIncomeLoss" prefix="ace"
                     qname="ace:ComprehensiveIncomeLoss"
                     label="Comprehensive income (loss)"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
         </concept>
         <concept id="us-gaap_EarningsPerShareAbstract" prefix="us-gaap"
                  qname="us-gaap:EarningsPerShareAbstract"
                  label="Earnings per share:"
                  substitution-group="xbrli:item"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="us-gaap_EarningsPerShareBasic" prefix="us-gaap"
                     qname="us-gaap:EarningsPerShareBasic"
                     label="Basic earnings per share"
                     substitution-group="xbrli:item"
                     data-type="us-types:perShareItemType"
                     xbrl-data-type="xbrli:decimalItemType"
                     abstract="false"
                     period-type="duration"/>
            <concept id="us-gaap_EarningsPerShareDiluted" prefix="us-gaap"
                     qname="us-gaap:EarningsPerShareDiluted"
                     label="Diluted earnings per share"
                     substitution-group="xbrli:item"
                     data-type="us-types:perShareItemType"
                     xbrl-data-type="xbrli:decimalItemType"
                     abstract="false"
                     period-type="duration"/>
         </concept>
      </concept>
   </extended-link>
   <extended-link uri="http://www.ace.com/role/ConsolidatedStatementsofShareholdersEquity"
                  definition="000035 - Statement - Consolidated Statements of Shareholders' Equity">
      <concept id="us-gaap_StatementOfStockholdersEquityAbstract" prefix="us-gaap"
               qname="us-gaap:StatementOfStockholdersEquityAbstract"
               label="Consolidated Statements of Shareholders' Equity"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="us-gaap_StatementTable" prefix="us-gaap" qname="us-gaap:StatementTable"
                  label="Statement [Table]"
                  substitution-group="xbrldt:hypercubeItem"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="us-gaap_StatementEquityComponentsAxis" prefix="us-gaap"
                     qname="us-gaap:StatementEquityComponentsAxis"
                     label="Statement of shareholders' equity by equity components"
                     substitution-group="xbrldt:dimensionItem"
                     data-type="xbrli:stringItemType"
                     xbrl-data-type="xbrli:stringItemType"
                     abstract="true"
                     period-type="duration">
               <concept id="us-gaap_EquityComponentDomain" prefix="us-gaap"
                        qname="us-gaap:EquityComponentDomain"
                        label="Equity components"
                        substitution-group="xbrli:item"
                        data-type="us-types:domainItemType"
                        xbrl-data-type="xbrli:stringItemType"
                        abstract="false"
                        period-type="duration">
                  <concept id="us-gaap_PreferredStockMember" prefix="us-gaap"
                           qname="us-gaap:PreferredStockMember"
                           label="Preferred stock"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="us-gaap_CommonStockMember" prefix="us-gaap"
                           qname="us-gaap:CommonStockMember"
                           label="Common stock"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="us-gaap_TreasuryStockMember" prefix="us-gaap"
                           qname="us-gaap:TreasuryStockMember"
                           label="Treasury stock"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="us-gaap_AdditionalPaidInCapitalMember" prefix="us-gaap"
                           qname="us-gaap:AdditionalPaidInCapitalMember"
                           label="Additional paid-in capital"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="us-gaap_RetainedEarningsMember" prefix="us-gaap"
                           qname="us-gaap:RetainedEarningsMember"
                           label="Retained earnings"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="us-gaap_DeferredCompensationShareBasedPaymentsMember" prefix="us-gaap"
                           qname="us-gaap:DeferredCompensationShareBasedPaymentsMember"
                           label="Deferred compensation, share-based payments"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" prefix="us-gaap"
                           qname="us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember"
                           label="Accumulated net unrealized investment gain (loss)"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="us-gaap_AccumulatedTranslationAdjustmentMember" prefix="us-gaap"
                           qname="us-gaap:AccumulatedTranslationAdjustmentMember"
                           label="Accumulated translation adjustment"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" prefix="us-gaap"
                           qname="us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember"
                           label="Accumulated defined benefit plan adjustment"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="ace_AccumulatedIncomeTaxExpenseBenefitMember" prefix="ace"
                           qname="ace:AccumulatedIncomeTaxExpenseBenefitMember"
                           label="Accumulated income tax (expense) benefit"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="us-gaap_AccumulatedOtherComprehensiveIncomeMember" prefix="us-gaap"
                           qname="us-gaap:AccumulatedOtherComprehensiveIncomeMember"
                           label="Accumulated other comprehensive income"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="ace_CommonStockIssuedEmployeeStockTrustMember" prefix="ace"
                           qname="ace:CommonStockIssuedEmployeeStockTrustMember"
                           label="Common stock issued to employee trust"
                           substitution-group="xbrli:item"
                           data-type="us-types:domainItemType"
                           xbrl-data-type="xbrli:stringItemType"
                           abstract="false"
                           period-type="duration"/>
               </concept>
            </concept>
            <concept id="us-gaap_StatementLineItems" prefix="us-gaap"
                     qname="us-gaap:StatementLineItems"
                     label="Statement [Line Items]"
                     substitution-group="xbrli:item"
                     data-type="xbrli:stringItemType"
                     xbrl-data-type="xbrli:stringItemType"
                     abstract="true"
                     period-type="duration">
               <concept id="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"
                        prefix="us-gaap"
                        qname="us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"
                        label="Shareholders' equity - beginning of period"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="instant"/>
               <concept id="ace_CumulativeEffectPartialAdoptionFAS157" prefix="ace"
                        qname="ace:CumulativeEffectPartialAdoptionFAS157"
                        label="Effect of partial adoption of fair value measurements standard"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_CumulativeEffectOfInitialAdoptionOfSFAS159" prefix="us-gaap"
                        qname="us-gaap:CumulativeEffectOfInitialAdoptionOfSFAS159"
                        label="Effect of adoption of fair value option standard"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="ace_OtherComprehensiveIncomeAdjustedForAdoptionOfAccountingPrinciple"
                        prefix="ace"
                        qname="ace:OtherComprehensiveIncomeAdjustedForAdoptionOfAccountingPrinciple"
                        label="Balance - beginning of period, adjusted for effect of adoption of new accounting principle"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_StockRedeemedOrCalledDuringPeriodValue" prefix="us-gaap"
                        qname="us-gaap:StockRedeemedOrCalledDuringPeriodValue"
                        label="Preferred Shares redeemed"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="ace_EffectOfAdoptionOfFSPFAS1152AndFAS1242" prefix="ace"
                        qname="ace:EffectOfAdoptionOfFSPFAS1152AndFAS1242"
                        label="Effect of adoption of OTTI standard"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation"
                        prefix="us-gaap"
                        qname="us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation"
                        label="Net shares issued under employee-based compensation plans"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" prefix="us-gaap"
                        qname="us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised"
                        label="Exercise of stock options"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="ace_DividendsDeclaredCommonStockParValueReduction" prefix="ace"
                        qname="ace:DividendsDeclaredCommonStockParValueReduction"
                        label="Dividends declared on Common Shares - par value reduction"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"
                        prefix="us-gaap"
                        qname="us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"
                        label="Stock issued during period, shares, employee stock purchase plans"
                        substitution-group="xbrli:item"
                        data-type="xbrli:sharesItemType"
                        xbrl-data-type="xbrli:sharesItemType"
                        abstract="false"
                        period-type="duration"/>
               <concept id="ace_TreasuryStockIssuedNetOfSharesRedeemedUnderEmployeeShareBasedCompensationPlans"
                        prefix="ace"
                        qname="ace:TreasuryStockIssuedNetOfSharesRedeemedUnderEmployeeShareBasedCompensationPlans"
                        label="Common shares issued in treasury, net of net shares redeemed under employee-based compensation plans"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"
                        prefix="us-gaap"
                        qname="us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"
                        label="Share-based compensation expense (APIC)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_NetIncomeLoss" prefix="us-gaap" qname="us-gaap:NetIncomeLoss"
                        label="Net income"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_DividendsCommonStockCash" prefix="us-gaap"
                        qname="us-gaap:DividendsCommonStockCash"
                        label="Dividends declared on Common Shares"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="us-gaap_DividendsPreferredStockCash" prefix="us-gaap"
                        qname="us-gaap:DividendsPreferredStockCash"
                        label="Dividends declared on Preferred Shares"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="us-gaap_DividendsCommonStockStock" prefix="us-gaap"
                        qname="us-gaap:DividendsCommonStockStock"
                        label="Common Shares stock dividend"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="us-gaap_IncreaseDecreaseInDeferredCompensation" prefix="us-gaap"
                        qname="us-gaap:IncreaseDecreaseInDeferredCompensation"
                        label="Decrease to obligation"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract"
                        prefix="us-gaap"
                        qname="us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract"
                        label="Accumulated other comprehensive income (loss):"
                        substitution-group="xbrli:item"
                        data-type="xbrli:stringItemType"
                        xbrl-data-type="xbrli:stringItemType"
                        abstract="true"
                        period-type="duration">
                  <concept id="us-gaap_OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentNetOfTaxPeriodIncreaseDecrease"
                           prefix="us-gaap"
                           qname="us-gaap:OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentNetOfTaxPeriodIncreaseDecrease"
                           label="Change in net unrealized appreciation (depreciation) on investments (AOCI), net of tax (expense) benefit of $(555) and $317"
                           substitution-group="xbrli:item"
                           data-type="xbrli:monetaryItemType"
                           xbrl-data-type="xbrli:monetaryItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease"
                           prefix="us-gaap"
                           qname="us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease"
                           label="Change in cumulative translation adjustment (AOCI), net of tax (expense) benefit of $(123) and $40"
                           substitution-group="xbrli:item"
                           data-type="xbrli:monetaryItemType"
                           xbrl-data-type="xbrli:monetaryItemType"
                           abstract="false"
                           period-type="duration"/>
                  <concept id="us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease"
                           prefix="us-gaap"
                           qname="us-gaap:OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease"
                           label="Change in pension liability adjustment (AOCI), net of tax (expense) benefit of $4 and $(2)"
                           substitution-group="xbrli:item"
                           data-type="xbrli:monetaryItemType"
                           xbrl-data-type="xbrli:monetaryItemType"
                           abstract="false"
                           period-type="duration"/>
               </concept>
               <concept id="ace_MovementInCommonSharesIssuedToEmployeeTrust" prefix="ace"
                        qname="ace:MovementInCommonSharesIssuedToEmployeeTrust"
                        label="Decrease in common shares (Employee Trust)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        period-type="duration"/>
               <concept id="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"
                        prefix="us-gaap"
                        qname="us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"
                        label="Shareholders' equity - end of period"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="instant"/>
            </concept>
         </concept>
      </concept>
   </extended-link>
   <extended-link uri="http://www.ace.com/role/ConsolidatedStatementOfCashFlows"
                  definition="000040 - Statement - Consolidated Statement of Cash Flows">
      <concept id="us-gaap_StatementOfCashFlowsAbstract" prefix="us-gaap"
               qname="us-gaap:StatementOfCashFlowsAbstract"
               label="Consolidated Statements of Cash Flow"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract"
                  prefix="us-gaap"
                  qname="us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract"
                  label="Cash flows from operating activities:"
                  substitution-group="xbrli:item"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="us-gaap_NetIncomeLoss" prefix="us-gaap" qname="us-gaap:NetIncomeLoss"
                     label="Net income"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"
                     prefix="us-gaap"
                     qname="us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"
                     label="Adjustments to reconcile net income to net cash flows from operating activities"
                     substitution-group="xbrli:item"
                     data-type="xbrli:stringItemType"
                     xbrl-data-type="xbrli:stringItemType"
                     abstract="true"
                     period-type="duration">
               <concept id="ace_NetRealizedGainsLosses" prefix="ace" qname="ace:NetRealizedGainsLosses"
                        label="Net realized (gains) losses"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_AmortizationOfFinancingCostsAndDiscounts" prefix="us-gaap"
                        qname="us-gaap:AmortizationOfFinancingCostsAndDiscounts"
                        label="Amortization of premium/discount on fixed maturities"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="us-gaap_IncreaseDecreaseInDeferredIncomeTaxes" prefix="us-gaap"
                        qname="us-gaap:IncreaseDecreaseInDeferredIncomeTaxes"
                        label="Deferred income taxes"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve"
                        prefix="us-gaap"
                        qname="us-gaap:IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve"
                        label="Unpaid losses and loss expenses (cash flow)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_IncreaseDecreaseInUnearnedPremiums" prefix="us-gaap"
                        qname="us-gaap:IncreaseDecreaseInUnearnedPremiums"
                        label="Unearned premiums (cash flow)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="us-gaap_IncreaseDecreaseInFuturePolicyBenefitReserves" prefix="us-gaap"
                        qname="us-gaap:IncreaseDecreaseInFuturePolicyBenefitReserves"
                        label="Future policy benefits (cash flow)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="ace_IncreaseDecreaseInInsuranceAndReinsuranceBalancesPayable" prefix="ace"
                        qname="ace:IncreaseDecreaseInInsuranceAndReinsuranceBalancesPayable"
                        label="Insurance and reinsurance balances payable (cash flow)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="ace_IncreaseDecreaseInAccountsPayableAccruedLiabilitiesOtherLiabilities"
                        prefix="ace"
                        qname="ace:IncreaseDecreaseInAccountsPayableAccruedLiabilitiesOtherLiabilities"
                        label="Accounts payable, accrued expenses, and other liabilities (cash flow)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" prefix="us-gaap"
                        qname="us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable"
                        label="Income taxes payable (cash flow)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="ace_IncreaseDecreaseInInsuranceAndReinsuranceBalancesReceivable"
                        prefix="ace"
                        qname="ace:IncreaseDecreaseInInsuranceAndReinsuranceBalancesReceivable"
                        label="Insurance and reinsurance balances receivable (cash flow)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="ace_IncreaseDecreaseInReinsuranceRecoverableLossesAndLossExpenses"
                        prefix="ace"
                        qname="ace:IncreaseDecreaseInReinsuranceRecoverableLossesAndLossExpenses"
                        label="Reinsurance recoverable on losses and loss expenses (cash flow)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="ace_IncreaseDecreaseInReinsuranceRecoverableFuturePolicyBenefits"
                        prefix="ace"
                        qname="ace:IncreaseDecreaseInReinsuranceRecoverableFuturePolicyBenefits"
                        label="Reinsurance recoverable on policy benefits (cash flow)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="debit"
                        period-type="duration"/>
               <concept id="us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts" prefix="us-gaap"
                        qname="us-gaap:IncreaseDecreaseInDeferredPolicyAcquisitionCosts"
                        label="Deferred policy acquisition costs (cash flow)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_IncreaseDecreaseInPrepaidReinsurancePremiums" prefix="us-gaap"
                        qname="us-gaap:IncreaseDecreaseInPrepaidReinsurancePremiums"
                        label="Prepaid reinsurance premiums (cash flow)"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" prefix="us-gaap"
                        qname="us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet"
                        label="Other cash flows from operating activities"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        balance="credit"
                        period-type="duration"/>
               <concept id="us-gaap_NetCashProvidedByUsedInOperatingActivities" prefix="us-gaap"
                        qname="us-gaap:NetCashProvidedByUsedInOperatingActivities"
                        label="Net cash flows from operating activities"
                        substitution-group="xbrli:item"
                        data-type="xbrli:monetaryItemType"
                        xbrl-data-type="xbrli:monetaryItemType"
                        abstract="false"
                        period-type="duration"/>
            </concept>
         </concept>
         <concept id="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"
                  prefix="us-gaap"
                  qname="us-gaap:NetCashProvidedByUsedInInvestingActivitiesAbstract"
                  label="Cash flows used for investing activities:"
                  substitution-group="xbrli:item"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" prefix="us-gaap"
                     qname="us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt"
                     label="Purchases of fixed maturities available for sale"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="ace_PaymentsToAcquireTBAMortgageBackedSecurities" prefix="ace"
                     qname="ace:PaymentsToAcquireTBAMortgageBackedSecurities"
                     label="Purchases of to be announced mortgage-backed securities"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_PaymentsToAcquireHeldToMaturitySecurities" prefix="us-gaap"
                     qname="us-gaap:PaymentsToAcquireHeldToMaturitySecurities"
                     label="Purchases of fixed maturities held to maturity"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity" prefix="us-gaap"
                     qname="us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesEquity"
                     label="Purchases of equity securities"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt" prefix="us-gaap"
                     qname="us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt"
                     label="Sales of fixed maturities available for sale"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="ace_ProceedsFromSalesTBAMortgageBackedSecurities" prefix="ace"
                     qname="ace:ProceedsFromSalesTBAMortgageBackedSecurities"
                     label="Sales of to be announced mortgage-backed securities"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_ProceedsFromSaleOfHeldToMaturitySecurities" prefix="us-gaap"
                     qname="us-gaap:ProceedsFromSaleOfHeldToMaturitySecurities"
                     label="Sales of fixed maturities held to maturity"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity"
                     prefix="us-gaap"
                     qname="us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesEquity"
                     label="Sales of equity securities"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities"
                     prefix="us-gaap"
                     qname="us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities"
                     label="Maturities and redemptions of fixed maturities available for sale"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities"
                     prefix="us-gaap"
                     qname="us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities"
                     label="Maturities and redemptions of fixed maturities held to maturity"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_PaymentsForProceedsFromDerivatives" prefix="us-gaap"
                     qname="us-gaap:PaymentsForProceedsFromDerivatives"
                     label="Net proceeds from (payments made on) the settlement of investment derivatives"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" prefix="us-gaap"
                     qname="us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired"
                     label="Acquisition of subsidiary (net of cash acquired of $19)"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_PaymentsForProceedsFromOtherInvestingActivities" prefix="us-gaap"
                     qname="us-gaap:PaymentsForProceedsFromOtherInvestingActivities"
                     label="Other cash flows from investing activities"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_NetCashProvidedByUsedInInvestingActivities" prefix="us-gaap"
                     qname="us-gaap:NetCashProvidedByUsedInInvestingActivities"
                     label="Net cash flows used for investing activities"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
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         <concept id="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"
                  prefix="us-gaap"
                  qname="us-gaap:NetCashProvidedByUsedInFinancingActivitiesAbstract"
                  label="Cash flows (used for) from financing activities:"
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                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="ace_ParValueReductionCommonShares" prefix="ace"
                     qname="ace:ParValueReductionCommonShares"
                     label="Par value reduction on Common Shares"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_PaymentsOfDividendsCommonStock" prefix="us-gaap"
                     qname="us-gaap:PaymentsOfDividendsCommonStock"
                     label="Dividends paid on Common Shares"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
            <concept id="us-gaap_ProceedsFromStockOptionsExercised" prefix="us-gaap"
                     qname="us-gaap:ProceedsFromStockOptionsExercised"
                     label="Proceeds from exercise of options for Common Shares"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_ProceedsFromStockPlans" prefix="us-gaap"
                     qname="us-gaap:ProceedsFromStockPlans"
                     label="Proceeds from Common Shares issued under ESPP"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock"
                     prefix="us-gaap"
                     qname="us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock"
                     label="Dividends paid on Preferred Shares"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="credit"
                     period-type="duration"/>
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                     qname="ace:ProceedsFromRepaymentsOfShortTermBorrowings"
                     label="Net (repayment of) proceeds from short-term debt"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
            <concept id="us-gaap_ProceedsFromRepaymentsOfLongTermDebtAndCapitalSecurities"
                     prefix="us-gaap"
                     qname="us-gaap:ProceedsFromRepaymentsOfLongTermDebtAndCapitalSecurities"
                     label="Net proceeds from issuance of long-term debt"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
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                     qname="us-gaap:ProceedsFromRepurchaseOfRedeemablePreferredStock"
                     label="Redemption of Preferred Shares"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
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                     qname="us-gaap:NetCashProvidedByUsedInFinancingActivities"
                     label="Net cash flows (used for) from financing activities"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
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         <concept id="us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsAbstract"
                  prefix="us-gaap"
                  qname="us-gaap:EffectOfExchangeRateOnCashAndCashEquivalentsAbstract"
                  label="Effect of foreign currency rate changes on cash and cash equivalents:"
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                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
            <concept id="us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" prefix="us-gaap"
                     qname="us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents"
                     label="Effect of foreign currency rate changes on cash and cash equivalents"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="duration"/>
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         <concept id="us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract" prefix="us-gaap"
                  qname="us-gaap:CashAndCashEquivalentsAtCarryingValueAbstract"
                  label="Cash:"
                  substitution-group="xbrli:item"
                  data-type="xbrli:stringItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="true"
                  period-type="duration">
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                     qname="us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease"
                     label="Net (decrease) increase in cash"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     period-type="duration"/>
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                     qname="us-gaap:CashAndCashEquivalentsAtCarryingValue"
                     label="Cash - beginning of period"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
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                     qname="us-gaap:CashAndCashEquivalentsAtCarryingValue"
                     label="Cash - end of period"
                     substitution-group="xbrli:item"
                     data-type="xbrli:monetaryItemType"
                     xbrl-data-type="xbrli:monetaryItemType"
                     abstract="false"
                     balance="debit"
                     period-type="instant"/>
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                  definition="000045 - Statement - Consolidated Statements of Cash Flows Parenthetical Disclosures">
      <concept id="ace_ConsolidatedStatementsOfCashFlowsParentheticals" prefix="ace"
               qname="ace:ConsolidatedStatementsOfCashFlowsParentheticals"
               label="Consolidated statements of cash flows parenthetical disclosures"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="us-gaap_CashAcquiredFromAcquisition" prefix="us-gaap"
                  qname="us-gaap:CashAcquiredFromAcquisition"
                  label="Cash acquired from acquisition of subsidiary"
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                  data-type="xbrli:monetaryItemType"
                  xbrl-data-type="xbrli:monetaryItemType"
                  abstract="false"
                  balance="debit"
                  period-type="duration"/>
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   <extended-link uri="http://www.ace.com/role/NoteGeneral"
                  definition="000100 - Disclosure - General">
      <concept id="ace_NotesToConsolidatedFinancialStatements" prefix="ace"
               qname="ace:NotesToConsolidatedFinancialStatements"
               label="Notes to the Consolidated Financial Statements"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock"
                  prefix="us-gaap"
                  qname="us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock"
                  label="General"
                  substitution-group="xbrli:item"
                  data-type="us-types:textBlockItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="false"
                  period-type="duration"/>
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   <extended-link uri="http://www.ace.com/role/NoteSignificantAccountingPolicies"
                  definition="000110 - Disclosure - Significant accounting policies">
      <concept id="ace_NotesToConsolidatedFinancialStatements" prefix="ace"
               qname="ace:NotesToConsolidatedFinancialStatements"
               label="Notes to the Consolidated Financial Statements"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="us-gaap_SignificantAccountingPoliciesTextBlock" prefix="us-gaap"
                  qname="us-gaap:SignificantAccountingPoliciesTextBlock"
                  label="Significant accounting policies"
                  substitution-group="xbrli:item"
                  data-type="us-types:textBlockItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="false"
                  period-type="duration"/>
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   <extended-link uri="http://www.ace.com/role/NoteInvestments"
                  definition="000120 - Disclosure - Investments">
      <concept id="ace_NotesToConsolidatedFinancialStatements" prefix="ace"
               qname="ace:NotesToConsolidatedFinancialStatements"
               label="Notes to the Consolidated Financial Statements"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="ace_InvestmentsDisclosureTextBlock" prefix="ace"
                  qname="ace:InvestmentsDisclosureTextBlock"
                  label="Investments"
                  substitution-group="xbrli:item"
                  data-type="us-types:textBlockItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="false"
                  period-type="duration"/>
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   <extended-link uri="http://www.ace.com/role/NoteAssumedReinsuranceProgramsInvolvingMinimumBenefitGuaranteesUnderAnnuityContracts"
                  definition="000130 - Disclosure - Assumed reinsurance programs involving minimum benefit guarantees under annuity contracts">
      <concept id="ace_NotesToConsolidatedFinancialStatements" prefix="ace"
               qname="ace:NotesToConsolidatedFinancialStatements"
               label="Notes to the Consolidated Financial Statements"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="us-gaap_ReinsuranceTextBlock" prefix="us-gaap"
                  qname="us-gaap:ReinsuranceTextBlock"
                  label="Assumed reinsurance programs involving minimum benefit guarantees under annuity contracts"
                  substitution-group="xbrli:item"
                  data-type="us-types:textBlockItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="false"
                  period-type="duration"/>
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   <extended-link uri="http://www.ace.com/role/NoteDebt" definition="000140 - Disclosure - Debt">
      <concept id="ace_NotesToConsolidatedFinancialStatements" prefix="ace"
               qname="ace:NotesToConsolidatedFinancialStatements"
               label="Notes to the Consolidated Financial Statements"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="us-gaap_DebtDisclosureTextBlock" prefix="us-gaap"
                  qname="us-gaap:DebtDisclosureTextBlock"
                  label="Debt"
                  substitution-group="xbrli:item"
                  data-type="us-types:textBlockItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="false"
                  period-type="duration"/>
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   <extended-link uri="http://www.ace.com/role/NoteCommitmentsContingenciesGuarantees"
                  definition="000150 - Disclosure - Commitments, contingencies, and guarantees">
      <concept id="ace_NotesToConsolidatedFinancialStatements" prefix="ace"
               qname="ace:NotesToConsolidatedFinancialStatements"
               label="Notes to the Consolidated Financial Statements"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="ace_CommitmentsContingenciesGuaranteesDisclosureTextBlock" prefix="ace"
                  qname="ace:CommitmentsContingenciesGuaranteesDisclosureTextBlock"
                  label="Commitments, contingencies and guarantees"
                  substitution-group="xbrli:item"
                  data-type="us-types:textBlockItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="false"
                  period-type="duration"/>
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                  definition="000160 - Disclosure - Shareholders' equity">
      <concept id="ace_NotesToConsolidatedFinancialStatements" prefix="ace"
               qname="ace:NotesToConsolidatedFinancialStatements"
               label="Notes to the Consolidated Financial Statements"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="us-gaap_StockholdersEquityNoteDisclosureTextBlock" prefix="us-gaap"
                  qname="us-gaap:StockholdersEquityNoteDisclosureTextBlock"
                  label="Shareholders' equity disclosure"
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                  data-type="us-types:textBlockItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="false"
                  period-type="duration"/>
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   <extended-link uri="http://www.ace.com/role/NoteShareBasedCompensation"
                  definition="000170 - Disclosure - Share-based compensation">
      <concept id="ace_NotesToConsolidatedFinancialStatements" prefix="ace"
               qname="ace:NotesToConsolidatedFinancialStatements"
               label="Notes to the Consolidated Financial Statements"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
         <concept id="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock"
                  prefix="us-gaap"
                  qname="us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock"
                  label="Share-based compensation"
                  substitution-group="xbrli:item"
                  data-type="us-types:textBlockItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="false"
                  period-type="duration"/>
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                  definition="000180 - Disclosure - Fair value measurements">
      <concept id="ace_NotesToConsolidatedFinancialStatements" prefix="ace"
               qname="ace:NotesToConsolidatedFinancialStatements"
               label="Notes to the Consolidated Financial Statements"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
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               period-type="duration">
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                  data-type="us-types:textBlockItemType"
                  xbrl-data-type="xbrli:stringItemType"
                  abstract="false"
                  period-type="duration"/>
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      <concept id="ace_NotesToConsolidatedFinancialStatements" prefix="ace"
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               label="Notes to the Consolidated Financial Statements"
               substitution-group="xbrli:item"
               data-type="xbrli:stringItemType"
               xbrl-data-type="xbrli:stringItemType"
               abstract="true"
               period-type="duration">
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                  data-type="us-types:textBlockItemType"
                  xbrl-data-type="xbrli:stringItemType"
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                  period-type="duration"/>
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      <concept id="ace_NotesToConsolidatedFinancialStatements" prefix="ace"
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               period-type="duration">
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                  xbrl-data-type="xbrli:stringItemType"
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                  period-type="duration"/>
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               xbrl-data-type="xbrli:stringItemType"
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               period-type="duration">
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               period-type="duration">
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                  period-type="duration"/>
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                  period-type="duration"/>
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                  data-type="xbrli:stringItemType"
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                  period-type="duration"/>
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                  qname="dei:EntityCurrentReportingStatus"
                  label="Entity current reporting status"
                  substitution-group="xbrli:item"
                  data-type="us-types:yesNoItemType"
                  xbrl-data-type="xbrli:tokenItemType"
                  abstract="false"
                  period-type="duration"/>
         <concept id="dei_EntityFilerCategory" prefix="dei" qname="dei:EntityFilerCategory"
                  label="Entity filer category"
                  substitution-group="xbrli:item"
                  data-type="us-types:filerCategoryItemType"
                  xbrl-data-type="xbrli:tokenItemType"
                  abstract="false"
                  period-type="duration"/>
         <concept id="dei_EntityPublicFloat" prefix="dei" qname="dei:EntityPublicFloat"
                  label="Entity public float"
                  substitution-group="xbrli:item"
                  data-type="xbrli:monetaryItemType"
                  xbrl-data-type="xbrli:monetaryItemType"
                  abstract="false"
                  balance="credit"
                  period-type="instant"/>
         <concept id="dei_EntityCommonStockSharesOutstanding" prefix="dei"
                  qname="dei:EntityCommonStockSharesOutstanding"
                  label="Entity common stock, shares outstanding"
                  substitution-group="xbrli:item"
                  data-type="xbrli:sharesItemType"
                  xbrl-data-type="xbrli:sharesItemType"
                  abstract="false"
                  period-type="instant"/>
      </concept>
   </extended-link>
   <extended-link uri="http://www.xbrl.org/2003/role/link"
                  definition="http://www.xbrl.org/2003/role/link"/>
</presentation>
