<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>511</ContextCount>
  <ElementCount>520</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>120</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Document and Entity Information Document</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/DocumentandEntityInformationDocument</Role>
      <ShortName>Document and Entity Information Document</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Document - Audit Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/AuditInformation</Role>
      <ShortName>Audit Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>0000003 - Statement - Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/ConsolidatedStatementsofOperations</Role>
      <ShortName>Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>0000004 - Statement - Statement of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/StatementofComprehensiveIncome</Role>
      <ShortName>Statement of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>0000005 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>0000006 - Statement - Consolidated Balance Sheets (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/ConsolidatedBalanceSheetsParentheticals</Role>
      <ShortName>Consolidated Balance Sheets (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>0000007 - Statement - Consolidated Statements of Shareholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/ConsolidatedStatementsofShareholdersEquity</Role>
      <ShortName>Consolidated Statements of Shareholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>0000008 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/ConsolidatedStatementsofCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>0000009 - Statement - Statement of Financial Position, Classified</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/StatementofFinancialPositionClassified</Role>
      <ShortName>Statement of Financial Position, Classified</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>0000010 - Disclosure - Business Description and Basis of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BusinessDescriptionandBasisofPresentation</Role>
      <ShortName>Business Description and Basis of Presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>0000011 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/SummaryofSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>0000012 - Disclosure - Revenue from Contracts with Customers</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/RevenuefromContractswithCustomers</Role>
      <ShortName>Revenue from Contracts with Customers</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>0000013 - Disclosure - Acquisitions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/Acquisitions</Role>
      <ShortName>Acquisitions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>0000014 - Disclosure - Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/Inventories</Role>
      <ShortName>Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>0000015 - Disclosure - Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/FinancialInstruments</Role>
      <ShortName>Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>0000016 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>0000017 - Disclosure - Property, Plant and Equipment, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/PropertyPlantandEquipmentNet</Role>
      <ShortName>Property, Plant and Equipment, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>0000018 - Disclosure - Goodwill and Other Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/GoodwillandOtherIntangibleAssets</Role>
      <ShortName>Goodwill and Other Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>0000019 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>0000020 - Disclosure - Shareholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/ShareholdersEquity</Role>
      <ShortName>Shareholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>0000021 - Disclosure - Equity Incentive Plan</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/EquityIncentivePlan</Role>
      <ShortName>Equity Incentive Plan</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>0000022 - Disclosure - Benefit Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlans</Role>
      <ShortName>Benefit Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>0000023 - Disclosure - Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/Taxes</Role>
      <ShortName>Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>0000024 - Disclosure - Other Charges (Income), Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/OtherChargesIncomeNet</Role>
      <ShortName>Other Charges (Income), Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>0000025 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>0000026 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/CommitmentsandContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>0000027 - Disclosure - Segment Reporting</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/SegmentReporting</Role>
      <ShortName>Segment Reporting</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>0000028 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/SummaryofSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.mt.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>0000029 - Disclosure - Revenue from Contracts with Customers (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/RevenuefromContractswithCustomersTables</Role>
      <ShortName>Revenue from Contracts with Customers (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/RevenuefromContractswithCustomers</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>0000031 - Disclosure - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/InventoriesTables</Role>
      <ShortName>Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/Inventories</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>0000032 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/FairValueMeasurements</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>0000033 - Disclosure - Property, Plant and Equipment, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/PropertyPlantandEquipmentNetTables</Role>
      <ShortName>Property, Plant and Equipment, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/PropertyPlantandEquipmentNet</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>0000034 - Disclosure - Goodwill and Other Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/GoodwillandOtherIntangibleAssetsTables</Role>
      <ShortName>Goodwill and Other Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/GoodwillandOtherIntangibleAssets</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>0000035 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/DebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/Debt</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>0000036 - Disclosure - Shareholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/ShareholdersEquityTables</Role>
      <ShortName>Shareholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/ShareholdersEquity</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>0000037 - Disclosure - Equity Incentive Plan (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/EquityIncentivePlanTables</Role>
      <ShortName>Equity Incentive Plan (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/EquityIncentivePlan</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>0000038 - Disclosure - Benefit Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlansTables</Role>
      <ShortName>Benefit Plans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/BenefitPlans</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>0000039 - Disclosure - Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/TaxesTables</Role>
      <ShortName>Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/Taxes</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>0000040 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/Leases</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>0000041 - Disclosure - Segment Reporting (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/SegmentReportingTables</Role>
      <ShortName>Segment Reporting (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/SegmentReporting</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>0000042 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/SummaryofSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.mt.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>0000043 - Disclosure - Summary of Significant Accounting Policies 2 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/SummaryofSignificantAccountingPolicies2Details</Role>
      <ShortName>Summary of Significant Accounting Policies 2 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mt.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>0000044 - Disclosure - Revenue from Contracts with Customers (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/RevenuefromContractswithCustomersDetails</Role>
      <ShortName>Revenue from Contracts with Customers (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mt.com/role/RevenuefromContractswithCustomersTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>0000045 - Disclosure - Acquisitions Business Combinations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/AcquisitionsBusinessCombinationsDetails</Role>
      <ShortName>Acquisitions Business Combinations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>0000046 - Disclosure - Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/InventoriesDetails</Role>
      <ShortName>Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mt.com/role/InventoriesTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>0000047 - Disclosure - Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/FinancialInstrumentsDetails</Role>
      <ShortName>Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mt.com/role/FinancialInstruments</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>0000048 - Disclosure - Fair Value Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/FairValueMeasurementsDetails</Role>
      <ShortName>Fair Value Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mt.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>0000049 - Disclosure - Property, Plant and Equipment, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/PropertyPlantandEquipmentNetDetails</Role>
      <ShortName>Property, Plant and Equipment, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mt.com/role/PropertyPlantandEquipmentNetTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>0000050 - Disclosure - Goodwill and Other Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/GoodwillandOtherIntangibleAssetsDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mt.com/role/GoodwillandOtherIntangibleAssetsTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>0000051 - Disclosure - Goodwill and Other Intangible Assets 1 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/GoodwillandOtherIntangibleAssets1Details</Role>
      <ShortName>Goodwill and Other Intangible Assets 1 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mt.com/role/GoodwillandOtherIntangibleAssetsTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>0000052 - Disclosure - Goodwill and Other Intangible Assets Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/GoodwillandOtherIntangibleAssetsNarrativeDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>0000053 - Disclosure - Debt - Schedule of Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/DebtScheduleofDebtDetails</Role>
      <ShortName>Debt - Schedule of Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>0000054 - Disclosure - Debt - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/DebtNarrativeDetails</Role>
      <ShortName>Debt - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>0000055 - Disclosure - Shareholders' Equity Other Comprehensive Income Rollforward (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/ShareholdersEquityOtherComprehensiveIncomeRollforwardDetails</Role>
      <ShortName>Shareholders' Equity Other Comprehensive Income Rollforward (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>0000056 - Disclosure - Shareholders' Equity Amounts recognized from accumulated other comprehensive income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/ShareholdersEquityAmountsrecognizedfromaccumulatedothercomprehensiveincomeDetails</Role>
      <ShortName>Shareholders' Equity Amounts recognized from accumulated other comprehensive income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>0000057 - Disclosure - Shareholders' Equity Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/ShareholdersEquityNarrativeDetails</Role>
      <ShortName>Shareholders' Equity Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>0000058 - Disclosure - Equity Incentive Plan Rollforward of Stock Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/EquityIncentivePlanRollforwardofStockOptionsDetails</Role>
      <ShortName>Equity Incentive Plan Rollforward of Stock Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>0000059 - Disclosure - Equity Incentive Plan Weighted Average Remaining Contractual Life (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/EquityIncentivePlanWeightedAverageRemainingContractualLifeDetails</Role>
      <ShortName>Equity Incentive Plan Weighted Average Remaining Contractual Life (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>0000060 - Disclosure - Equity Incentive Plan Weighted Average Grant Date Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/EquityIncentivePlanWeightedAverageGrantDateFairValueDetails</Role>
      <ShortName>Equity Incentive Plan Weighted Average Grant Date Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>0000061 - Disclosure - Equity Incentive Plan RSUs and PSUs Rollforward (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/EquityIncentivePlanRSUsandPSUsRollforwardDetails</Role>
      <ShortName>Equity Incentive Plan RSUs and PSUs Rollforward (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>0000062 - Disclosure - Equity Incentive Plan Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/EquityIncentivePlanNarrativeDetails</Role>
      <ShortName>Equity Incentive Plan Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>0000063 - Disclosure - Benefit Plans Change in Benefit Benefit Obligation and Plan Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlansChangeinBenefitBenefitObligationandPlanAssetsDetails</Role>
      <ShortName>Benefit Plans Change in Benefit Benefit Obligation and Plan Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>0000064 - Disclosure - Benefit Plans Amounts Recognized in the Balance Sheet (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlansAmountsRecognizedintheBalanceSheetDetails</Role>
      <ShortName>Benefit Plans Amounts Recognized in the Balance Sheet (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>0000065 - Disclosure - Benefit Plans Total Amounts Recognized in OCI (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlansTotalAmountsRecognizedinOCIDetails</Role>
      <ShortName>Benefit Plans Total Amounts Recognized in OCI (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>0000066 - Disclosure - Benefit Plans Amounts Recognized in Other Comprehensive Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlansAmountsRecognizedinOtherComprehensiveIncomeDetails</Role>
      <ShortName>Benefit Plans Amounts Recognized in Other Comprehensive Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>0000067 - Disclosure - Benefit Plans Weighted Average Rates for PBO (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlansWeightedAverageRatesforPBODetails</Role>
      <ShortName>Benefit Plans Weighted Average Rates for PBO (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>0000068 - Disclosure - Benefit Plans Weighted Average Rates for NPPC (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlansWeightedAverageRatesforNPPCDetails</Role>
      <ShortName>Benefit Plans Weighted Average Rates for NPPC (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>0000069 - Disclosure - Benefit Plans Net Periodic Pension Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlansNetPeriodicPensionCostsDetails</Role>
      <ShortName>Benefit Plans Net Periodic Pension Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>0000070 - Disclosure - Benefit Plans Pension Fair Value Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlansPensionFairValueAssetsDetails</Role>
      <ShortName>Benefit Plans Pension Fair Value Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>0000071 - Disclosure - Benefit Plans Level 3 Rollforward (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlansLevel3RollforwardDetails</Role>
      <ShortName>Benefit Plans Level 3 Rollforward (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>0000072 - Disclosure - Benefit Plans Future Cash Flows (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlansFutureCashFlowsDetails</Role>
      <ShortName>Benefit Plans Future Cash Flows (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>0000073 - Disclosure - Benefit Plans Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/BenefitPlansNarrativeDetails</Role>
      <ShortName>Benefit Plans Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>0000074 - Disclosure - Taxes Summary of Earnings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/TaxesSummaryofEarningsDetails</Role>
      <ShortName>Taxes Summary of Earnings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>0000075 - Disclosure - Taxes Summary of the provision for taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/TaxesSummaryoftheprovisionfortaxesDetails</Role>
      <ShortName>Taxes Summary of the provision for taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>0000076 - Disclosure - Taxes Effective Tax Rate Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/TaxesEffectiveTaxRateReconciliationDetails</Role>
      <ShortName>Taxes Effective Tax Rate Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>0000077 - Disclosure - Taxes Tax Effects of Temporary Differences (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/TaxesTaxEffectsofTemporaryDifferencesDetails</Role>
      <ShortName>Taxes Tax Effects of Temporary Differences (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>0000078 - Disclosure - Taxes Reconciliation of unrecognized tax benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/TaxesReconciliationofunrecognizedtaxbenefitsDetails</Role>
      <ShortName>Taxes Reconciliation of unrecognized tax benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>0000079 - Disclosure - Taxes Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/TaxesNarrativeDetails</Role>
      <ShortName>Taxes Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>0000080 - Disclosure - Other Charges (Income), Net Other Charges (Income), Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/OtherChargesIncomeNetOtherChargesIncomeNetDetails</Role>
      <ShortName>Other Charges (Income), Net Other Charges (Income), Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.mt.com/role/OtherChargesIncomeNet</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>0000081 - Disclosure - Leases Lease Balance Sheet (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/LeasesLeaseBalanceSheetDetails</Role>
      <ShortName>Leases Lease Balance Sheet (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>0000082 - Disclosure - Leases Lease Income Statement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/LeasesLeaseIncomeStatementDetails</Role>
      <ShortName>Leases Lease Income Statement (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>0000083 - Disclosure - Leases Lease Maturity Analysis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/LeasesLeaseMaturityAnalysisDetails</Role>
      <ShortName>Leases Lease Maturity Analysis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>0000084 - Disclosure - Leases Lease Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/LeasesLeaseNarrativeDetails</Role>
      <ShortName>Leases Lease Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>0000085 - Disclosure - Segment Reporting Segment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/SegmentReportingSegmentDetails</Role>
      <ShortName>Segment Reporting Segment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>0000086 - Disclosure - Segment Reporting Reconciliation of Earnings Before Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/SegmentReportingReconciliationofEarningsBeforeTaxesDetails</Role>
      <ShortName>Segment Reporting Reconciliation of Earnings Before Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>0000087 - Disclosure - Segment Reporting Revenues by Division (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/SegmentReportingRevenuesbyDivisionDetails</Role>
      <ShortName>Segment Reporting Revenues by Division (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>0000088 - Disclosure - Segment Reporting Sales and PPE by Destination (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/SegmentReportingSalesandPPEbyDestinationDetails</Role>
      <ShortName>Segment Reporting Sales and PPE by Destination (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>0000089 - Disclosure - Segment Reporting Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/SegmentReportingTextualsDetails</Role>
      <ShortName>Segment Reporting Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="mtd-20221231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>0000090 - Disclosure - Schedule II Valuation and Qualifying Accounts Schedule II (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.mt.com/role/ScheduleIIValuationandQualifyingAccountsScheduleIIDetails</Role>
      <ShortName>Schedule II Valuation and Qualifying Accounts Schedule II (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Warning">[ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 80 fact(s) appearing in ix:hidden were eligible for transformation: dei:CurrentFiscalYearEndDate, dei:DocumentPeriodEndDate, dei:EntityEmergingGrowthCompany, dei:EntityFilerCategory, dei:EntityShellCompany, dei:EntitySmallBusiness, dei:IcfrAuditorAttestationFlag, mtd:PerformanceShareUnitPayoutPercentageMinimum, mtd:PerformanceShareUnitsPayoutPercentageMaximum, mtd:PerformanceShareUnitsVestingPeriod, mtd:RestrictedStockUnitsVestingPeriod, us-gaap:AllowanceForDoubtfulAccountsReceivable, us-gaap:CommonStockParOrStatedValuePerShare, us-gaap:CommonStockSharesAuthorized, us-gaap:CommonStockSharesIssued, us-gaap:CommonStockSharesOutstanding, us-gaap:DebtInstrumentBasisSpreadOnVariableRate1, us-gaap:DebtInstrumentInterestRateStatedPercentage, us-gaap:DebtInstrumentMaturityDate, us-gaap:DebtInstrumentTerm, us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate, us-gaap:GainLossOnForeignCurrencyCashFlowHedgeIneffectiveness, us-gaap:GainLossOnInterestRateCashFlowHedgeIneffectiveness, us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity, us-gaap:PreferredStockParOrStatedValuePerShare, us-gaap:PreferredStockSharesAuthorized, us-gaap:PropertyPlantAndEquipmentUsefulLife, us-gaap:SeniorNotes, us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1, us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod, us-gaap:TreasuryStockShares -  mtd-20221231.htm 4</Log>
  </Logs>
  <InputFiles>
    <File doctype="10-K" original="mtd-20221231.htm">mtd-20221231.htm</File>
    <File>mtd-20221231.xsd</File>
    <File>mtd-20221231_cal.xml</File>
    <File>mtd-20221231_def.xml</File>
    <File>mtd-20221231_lab.xml</File>
    <File>mtd-20221231_pre.xml</File>
    <File>mtd_ex10322022pobsplusregu.htm</File>
    <File>mtd_exhibit2112312022.htm</File>
    <File>mtd_exhibit23112312022.htm</File>
    <File>mtd_exhibit311x12312022.htm</File>
    <File>mtd_exhibit31212312022.htm</File>
    <File>mtd_exhibit3212312022.htm</File>
    <File>wongemploymentagreement.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>mtd-20221231_g1.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2022</BaseTaxonomy>
    <BaseTaxonomy items="1712">http://fasb.org/us-gaap/2022</BaseTaxonomy>
    <BaseTaxonomy items="43">http://xbrl.sec.gov/dei/2022</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
