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        <link:definition>2415401 - Disclosure - Subsequent Events Subsequent Events (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element abstract="true" id="cme_A750.0MillionFixedRateNotesDueMarch2025InterestEqualTo3.00Member" name="A750.0MillionFixedRateNotesDueMarch2025InterestEqualTo3.00Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cme_AccessAndCommunicationFees" name="AccessAndCommunicationFees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cme_AgreementAutomaticRenewalPeriod" name="AgreementAutomaticRenewalPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:decimalItemType" xbrli:periodType="duration" />
  <xsd:element id="cme_AverageDailyClearingSettlement" name="AverageDailyClearingSettlement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cme_ClassBCommonStockClassB1Member" name="ClassBCommonStockClassB1Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cme_ClassBCommonStockClassB2Member" name="ClassBCommonStockClassB2Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cme_ClassBCommonStockClassB3Member" name="ClassBCommonStockClassB3Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cme_ClassBCommonStockClassB4Member" name="ClassBCommonStockClassB4Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cme_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="cme_FairvalueofDebtInstrumentsTableTextBlock" name="FairvalueofDebtInstrumentsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cme_FamilyFarmerAndRanchersProtectionFundMember" name="FamilyFarmerAndRanchersProtectionFundMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cme_ForwardStartingInterestRateSwapAgreementFixedRate" name="ForwardStartingInterestRateSwapAgreementFixedRate" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="cme_Futurelosses" name="Futurelosses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cme_GuaranteeCollateral" name="GuaranteeCollateral" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cme_LegalFeesforSaleLeaseback" name="LegalFeesforSaleLeaseback" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="cme_MarginDepositsAndGuarantyFundsLiabilitiesCurrent" name="MarginDepositsAndGuarantyFundsLiabilitiesCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cme_Paymentpercooperative" name="Paymentpercooperative" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cme_Paymentperparticipant" name="Paymentperparticipant" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cme_PaymentsunderGuarantee" name="PaymentsunderGuarantee" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cme_PerformanceBondsandGuarantyFundContributionsAbstract" name="PerformanceBondsandGuarantyFundContributionsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="cme_PerformanceBondsandGuarantyFundContributionsTextBlock" name="PerformanceBondsandGuarantyFundContributionsTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cme_ScheduleofDebtFairValueLineItems" name="ScheduleofDebtFairValueLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cme_ScheduleofDebtFairValueTable" name="ScheduleofDebtFairValueTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandFortyThreeInterestEqualToFivePointThreePercentMember" name="SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandFortyThreeInterestEqualToFivePointThreePercentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cme_SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandTwentyTwoInterestEqualToThreePointZeroPercentMemberMember" name="SevenHundredFiftyMillionFixedRateNotesDueMarchTwoThousandTwentyTwoInterestEqualToThreePointZeroPercentMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cme_TotalCostofTransaction" name="TotalCostofTransaction" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
</xsd:schema>
