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        <link:definition>1009 - Disclosure - Business</link:definition>
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        <link:definition>1010 - Disclosure - Accounting Changes and Reclassifications</link:definition>
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        <link:definition>1011 - Disclosure - Summary of Significant Accounting Policies</link:definition>
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        <link:definition>1012 - Disclosure - Landfill and Environmental Remediation Liabilities</link:definition>
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        <link:definition>1013 - Disclosure - Property and Equipment</link:definition>
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        <link:definition>1014 - Disclosure - Goodwill and Other Intangible Assets</link:definition>
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        <link:definition>1015 - Disclosure - Debt</link:definition>
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        <link:definition>1018 - Disclosure - Employee Benefit Plans</link:definition>
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        <link:definition>1021 - Disclosure - Asset Impairments and Unusual Items</link:definition>
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        <link:definition>1022 - Disclosure - Accumulated Other Comprehensive Income</link:definition>
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        <link:definition>1023 - Disclosure - Capital Stock, Dividends and Share Repurchases</link:definition>
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        <link:definition>1024 - Disclosure - Stock-Based Compensation</link:definition>
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        <link:definition>1025 - Disclosure - Earnings Per Share</link:definition>
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        <link:definition>1026 - Disclosure - Fair Value Measurements</link:definition>
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        <link:definition>1027 - Disclosure - Acquisitions and Divestitures</link:definition>
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        <link:definition>1028 - Disclosure - Variable Interest Entities</link:definition>
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        <link:definition>1029 - Disclosure - Segment and Related Information</link:definition>
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        <link:definition>1030 - Disclosure - Quarterly Financial Data (Unaudited)</link:definition>
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        <link:definition>1031 - Disclosure - Condensed Consolidating Financial Statements</link:definition>
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        <link:definition>1032 - Disclosure - New Accounting Standard Pending Adoption (Unaudited)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1033 - Disclosure - Subsequent Event</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1034 - Disclosure - Valuation and Qualifying Accounts</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsAccountingChangesAndErrorCorrectionsTextBlockPolicies" id="Role_NotesToFinancialStatementsAccountingChangesAndErrorCorrectionsTextBlockPolicies">
        <link:definition>1035 - Disclosure - Accounting Changes and Reclassifications (Policies)</link:definition>
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        <link:definition>1036 - Disclosure - Summary of Significant Accounting Policies (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsAssetRetirementObligationAndEnvironmentalRemediationDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsAssetRetirementObligationAndEnvironmentalRemediationDisclosureTextBlockTables">
        <link:definition>1037 - Disclosure - Landfill and Environmental Remediation Liabilities (Tables)</link:definition>
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        <link:definition>1038 - Disclosure - Property and Equipment (Tables)</link:definition>
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        <link:definition>1039 - Disclosure - Goodwill and Other Intangible Assets (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsDebtDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsDebtDisclosureTextBlockTables">
        <link:definition>1040 - Disclosure - Debt (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1041 - Disclosure - Income Taxes (Tables)</link:definition>
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        <link:definition>1042 - Disclosure - Employee Benefit Plans (Tables)</link:definition>
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        <link:definition>1043 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsRestructuringAndRelatedActivitiesDisclosureTextBlockTables">
        <link:definition>1044 - Disclosure - Restructuring (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsUnusualOrInfrequentItemsDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsUnusualOrInfrequentItemsDisclosureTextBlockTables">
        <link:definition>1045 - Disclosure - Asset Impairments and Unusual Items (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsComprehensiveIncomeNoteTextBlockTables" id="Role_NotesToFinancialStatementsComprehensiveIncomeNoteTextBlockTables">
        <link:definition>1046 - Disclosure - Accumulated Other Comprehensive Income (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsCapitalStockDividendsAndShareRepurchasesTextBlockTables" id="Role_NotesToFinancialStatementsCapitalStockDividendsAndShareRepurchasesTextBlockTables">
        <link:definition>1047 - Disclosure - Capital Stock, Dividends and Share Repurchases (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockTables" id="Role_NotesToFinancialStatementsDisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlockTables">
        <link:definition>1048 - Disclosure - Stock-Based Compensation (Tables)</link:definition>
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        <link:definition>1049 - Disclosure - Earnings Per Share (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsFairValueDisclosuresTextBlockTables" id="Role_NotesToFinancialStatementsFairValueDisclosuresTextBlockTables">
        <link:definition>1050 - Disclosure - Fair Value Measurements (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsBusinessCombinationDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsBusinessCombinationDisclosureTextBlockTables">
        <link:definition>1051 - Disclosure - Acquisitions and Divestitures (Tables)</link:definition>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables" id="Role_NotesToFinancialStatementsSegmentReportingDisclosureTextBlockTables">
        <link:definition>1052 - Disclosure - Segment and Related Information (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsQuarterlyFinancialInformationTextBlockTables" id="Role_NotesToFinancialStatementsQuarterlyFinancialInformationTextBlockTables">
        <link:definition>1053 - Disclosure - Quarterly Financial Data (Unaudited) (Tables)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/NotesToFinancialStatementsCondensedFinancialStatementsTextBlockTables" id="Role_NotesToFinancialStatementsCondensedFinancialStatementsTextBlockTables">
        <link:definition>1054 - Disclosure - Condensed Consolidating Financial Statements (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureBusinessAdditionalInformation" id="DisclosureBusinessAdditionalInformation">
        <link:definition>1055 - Disclosure - Business - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformation" id="DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformation">
        <link:definition>1056 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1057 - Disclosure - Summary of Significant Accounting Policies - Summary of Impacts of Revisions to the Risk-Free Discount Rate Applied to Environmental Remediation Liabilities and Recovery Assets (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfEstimatedUsefulLivesForSignificantPropertyAndEquipmentCategories" id="DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfEstimatedUsefulLivesForSignificantPropertyAndEquipmentCategories">
        <link:definition>1058 - Disclosure - Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives for Significant Property and Equipment Categories (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfEquityAndCostMethodInvestments" id="DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfEquityAndCostMethodInvestments">
        <link:definition>1059 - Disclosure - Summary of Significant Accounting Policies - Summary of Equity and Cost Method Investments (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1060 - Disclosure - Summary of Significant Accounting Policies - Schedule of Supplemental Cash Flow Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureLandfillAndEnvironmentalRemediationLiabilitiesLiabilitiesForLandfillAndEnvironmentalRemediationCosts" id="DisclosureLandfillAndEnvironmentalRemediationLiabilitiesLiabilitiesForLandfillAndEnvironmentalRemediationCosts">
        <link:definition>1061 - Disclosure - Landfill and Environmental Remediation Liabilities - Liabilities for Landfill and Environmental Remediation Costs (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureLandfillAndEnvironmentalRemediationLiabilitiesChangesToLandfillAndEnvironmentalRemediationLiabilities" id="DisclosureLandfillAndEnvironmentalRemediationLiabilitiesChangesToLandfillAndEnvironmentalRemediationLiabilities">
        <link:definition>1062 - Disclosure - Landfill and Environmental Remediation Liabilities - Changes to Landfill and Environmental Remediation Liabilities (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1063 - Disclosure - Landfill and Environmental Remediation Liabilities - Changes to Landfill and Environmental Remediation Liabilities (Parenthetical) (Detail)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1064 - Disclosure - Landfill and Environmental Remediation Liabilities - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosurePropertyAndEquipmentPropertyAndEquipment" id="DisclosurePropertyAndEquipmentPropertyAndEquipment">
        <link:definition>1065 - Disclosure - Property and Equipment - Property and Equipment (Detail)</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1066 - Disclosure - Property and Equipment - Depreciation and Amortization Expense Including Amortization Expense for Assets Recorded as Capital Leases (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1067 - Disclosure - Goodwill and Other Intangible Assets - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1068 - Disclosure - Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureDebtComponentsOfDebt" id="DisclosureDebtComponentsOfDebt">
        <link:definition>1069 - Disclosure - Debt - Components of Debt (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureDebtComponentsOfDebtParenthetical" id="DisclosureDebtComponentsOfDebtParenthetical">
        <link:definition>1070 - Disclosure - Debt - Components of Debt (Parenthetical) (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureDebtAdditionalInformation" id="DisclosureDebtAdditionalInformation">
        <link:definition>1071 - Disclosure - Debt - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureDebtSummaryOfRequirementsOfFinancialCovenantsContainedInRevolvingCreditFacilities" id="DisclosureDebtSummaryOfRequirementsOfFinancialCovenantsContainedInRevolvingCreditFacilities">
        <link:definition>1072 - Disclosure - Debt - Summary of Requirements of Financial Covenants Contained in Revolving Credit Facilities (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformation" id="DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformation">
        <link:definition>1073 - Disclosure - Derivative Instruments and Hedging Activities - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureIncomeTaxesProvisionForIncomeTaxes" id="DisclosureIncomeTaxesProvisionForIncomeTaxes">
        <link:definition>1074 - Disclosure - Income Taxes - Provision for Income Taxes (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureIncomeTaxesUSFederalStatutoryIncomeTaxRateReconciledToEffectiveRate" id="DisclosureIncomeTaxesUSFederalStatutoryIncomeTaxRateReconciledToEffectiveRate">
        <link:definition>1075 - Disclosure - Income Taxes - U.S. Federal Statutory Income Tax Rate Reconciled to Effective Rate (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1076 - Disclosure - Income Taxes - Income Before Income Taxes Showing Domestic and Foreign Source (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureIncomeTaxesAdditionalInformation" id="DisclosureIncomeTaxesAdditionalInformation">
        <link:definition>1077 - Disclosure - Income Taxes - Additional information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1078 - Disclosure - Income Taxes - Components of Net Deferred Tax Assets (Liabilities) (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureIncomeTaxesReconciliationOfBeginningAndEndingAmountOfGrossUnrecognizedTaxBenefitsIncludingAccruedInterest" id="DisclosureIncomeTaxesReconciliationOfBeginningAndEndingAmountOfGrossUnrecognizedTaxBenefitsIncludingAccruedInterest">
        <link:definition>1079 - Disclosure - Income Taxes - Reconciliation of Beginning and Ending Amount of Gross Unrecognized Tax Benefits, Including Accrued interest (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformation" id="DisclosureEmployeeBenefitPlansAdditionalInformation">
        <link:definition>1080 - Disclosure - Employee Benefit Plans - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureEmployeeBenefitPlansIndividuallySignificantMultiemployerPensionPlans" id="DisclosureEmployeeBenefitPlansIndividuallySignificantMultiemployerPensionPlans">
        <link:definition>1081 - Disclosure - Employee Benefit Plans - Individually Significant Multiemployer Pension Plans (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureEmployeeBenefitPlansIndividuallySignificantMultiemployerPensionPlansParenthetical" id="DisclosureEmployeeBenefitPlansIndividuallySignificantMultiemployerPensionPlansParenthetical">
        <link:definition>1082 - Disclosure - Employee Benefit Plans - Individually Significant Multiemployer Pension Plans (Parenthetical) (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureEmployeeBenefitPlansMultiemployerPlanAndYearWithEmployersTotalContributionGreaterThan5" id="DisclosureEmployeeBenefitPlansMultiemployerPlanAndYearWithEmployersTotalContributionGreaterThan5">
        <link:definition>1083 - Disclosure - Employee Benefit Plans - Multiemployer Plan and Year with Employer's Total Contribution Greater Than 5% (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformation" id="DisclosureCommitmentsAndContingenciesAdditionalInformation">
        <link:definition>1084 - Disclosure - Commitments and Contingencies - Additional information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureCommitmentsAndContingenciesChangesToNetInsuranceLiabilities" id="DisclosureCommitmentsAndContingenciesChangesToNetInsuranceLiabilities">
        <link:definition>1085 - Disclosure - Commitments and Contingencies - Changes to Net Insurance Liabilities (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureCommitmentsAndContingenciesChangesToNetInsuranceLiabilitiesParenthetical" id="DisclosureCommitmentsAndContingenciesChangesToNetInsuranceLiabilitiesParenthetical">
        <link:definition>1086 - Disclosure - Commitments and Contingencies - Changes to Net Insurance Liabilities (Parenthetical) (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureRestructuringRestructuringChargesPreTaxBySegment" id="DisclosureRestructuringRestructuringChargesPreTaxBySegment">
        <link:definition>1087 - Disclosure - Restructuring - Restructuring Charges Pre Tax by Segment (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureRestructuringAdditionalInformation" id="DisclosureRestructuringAdditionalInformation">
        <link:definition>1088 - Disclosure - Restructuring - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureAssetImpairmentsAndUnusualItemsAdditionalInformation" id="DisclosureAssetImpairmentsAndUnusualItemsAdditionalInformation">
        <link:definition>1089 - Disclosure - Asset Impairments and Unusual Items - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1090 - Disclosure - Asset Impairments and Unusual Items - Components of (Income) Expense from Divestitures, Asset Impairments (Other Than Goodwill) and Unusual Items (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1091 - Disclosure - Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1092 - Disclosure - Accumulated Other Comprehensive Income - Components of Accumulated Other Comprehensive Income (Parenthetical) (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1093 - Disclosure - Accumulated Other Comprehensive Income - Other Comprehensive Income (Loss) Before Reclassifications Associated With the Effective Portion of Derivatives Designated as Cash Flow Hedges (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1094 - Disclosure - Accumulated Other Comprehensive Income - Reclassification of Component of Accumulated Other Comprehensive Income (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1095 - Disclosure - Capital Stock, Dividends and Share Repurchases - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1096 - Disclosure - Capital Stock, Dividends and Share Repurchases - Stock Repurchase Programs (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>1097 - Disclosure - Capital Stock, Dividends and Share Repurchases - Stock Repurchase Programs (Parenthetical) (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1098 - Disclosure - Stock-Based Compensation - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
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        <link:definition>1099 - Disclosure - Stock-Based Compensation - Summary of RSUs (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.wm.com/taxonomy/role/DisclosureStockBasedCompensationSummaryOfPSUs" id="DisclosureStockBasedCompensationSummaryOfPSUs">
        <link:definition>1100 - Disclosure - Stock-Based Compensation - Summary of PSUs (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>1103 - Disclosure - Stock-Based Compensation - Weighted Average Assumptions Used to Value Employee Stock Options Granted (Detail)</link:definition>
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        <link:definition>1104 - Disclosure - Earnings Per Share - Common Share Data Used for Computing Basic and Diluted Earnings Per Share (Detail)</link:definition>
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        <link:definition>1105 - Disclosure - Fair Value Measurements - Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail)</link:definition>
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        <link:definition>1106 - Disclosure - Fair Value Measurements - Additional Information (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1107 - Disclosure - Acquisitions and Divestitures - Additional Information (Detail)</link:definition>
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        <link:definition>1111 - Disclosure - Segment and Related Information - Additional Information (Detail)</link:definition>
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        <link:definition>1112 - Disclosure - Segment and Related Information - Reportable Segments (Detail)</link:definition>
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        <link:definition>1113 - Disclosure - Segment and Related Information - Reportable Segments (Parenthetical) (Detail)</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>1116 - Disclosure - Segment and Related Information - Summary of Property and Equipment (Net) Relating to Operations by Segment (Detail)</link:definition>
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        <link:definition>1122 - Disclosure - Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Cash Flows (Detail)</link:definition>
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  <element name="WasteProcessingFacilityMember" id="wm_WasteProcessingFacilityMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WasteToEnergyFacilityMember" id="wm_WasteToEnergyFacilityMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WasteToEnergyLlcMember" id="wm_WasteToEnergyLlcMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WasteToEnergyLlcOneMember" id="wm_WasteToEnergyLlcOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WasteToEnergyLlcTwoMember" id="wm_WasteToEnergyLlcTwoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WeightedAverageRateApplicableToAssetRetirementObligations" id="wm_WeightedAverageRateApplicableToAssetRetirementObligations" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WesternCanadaAreaMember" id="wm_WesternCanadaAreaMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WesternConferenceOfTeamstersPensionPlanMember" id="wm_WesternConferenceOfTeamstersPensionPlanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WesternPennsylvaniaTeamstersAndEmployersPensionPlanMember" id="wm_WesternPennsylvaniaTeamstersAndEmployersPensionPlanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="WheelabratorMember" id="wm_WheelabratorMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
  <element name="YearContributionsToPlanExceededFivePercent" id="wm_YearContributionsToPlanExceededFivePercent" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
</schema>
