<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.0.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>636</ContextCount>
  <ElementCount>633</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>180</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>16</UnitCount>
  <MyReports>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0002002 - Document - Audit Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/AuditInformation</Role>
      <ShortName>Audit Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1001003 - Statement - Consolidated Statements of Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/ConsolidatedStatementsofIncome</Role>
      <ShortName>Consolidated Statements of Income</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1002004 - Statement - Consolidated Statements of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/ConsolidatedStatementsofComprehensiveIncome</Role>
      <ShortName>Consolidated Statements of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1003005 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/ConsolidatedStatementsofComprehensiveIncomeParenthetical</Role>
      <ShortName>Consolidated Statements of Comprehensive Income (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1004006 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1005007 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1006008 - Statement - Consolidated Statements of Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/ConsolidatedStatementsofStockholdersEquity</Role>
      <ShortName>Consolidated Statements of Stockholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>1007009 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/ConsolidatedStatementsofCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2101101 - Disclosure - Description of Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/DescriptionofBusiness</Role>
      <ShortName>Description of Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2103102 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SummaryofSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2114103 - Disclosure - Business Acquisitions, Goodwill and Acquired Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssets</Role>
      <ShortName>Business Acquisitions, Goodwill and Acquired Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2124104 - Disclosure - Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/FinancialInstruments</Role>
      <ShortName>Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2126105 - Disclosure - Accounts Receivable and Unbilled Receivables</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/AccountsReceivableandUnbilledReceivables</Role>
      <ShortName>Accounts Receivable and Unbilled Receivables</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2129106 - Disclosure - Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/Inventories</Role>
      <ShortName>Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2132107 - Disclosure - Supplemental Balance Sheet Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SupplementalBalanceSheetInformation</Role>
      <ShortName>Supplemental Balance Sheet Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2136108 - Disclosure - Stockholders??? Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/StockholdersEquity</Role>
      <ShortName>Stockholders??? Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2145109 - Disclosure - Long-Term Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/LongTermDebt</Role>
      <ShortName>Long-Term Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2150110 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2157111 - Disclosure - Pension Plans and Postretirement Benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/PensionPlansandPostretirementBenefits</Role>
      <ShortName>Pension Plans and Postretirement Benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2169112 - Disclosure - Business Segments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessSegments</Role>
      <ShortName>Business Segments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2176113 - Disclosure - Lease Commitments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/LeaseCommitments</Role>
      <ShortName>Lease Commitments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2180114 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/CommitmentsandContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2182115 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2184116 - Disclosure - Schedule II Valuation and Qualifying Accounts</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/ScheduleIIValuationandQualifyingAccounts</Role>
      <ShortName>Schedule II Valuation and Qualifying Accounts</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2204201 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2305301 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2315302 - Disclosure - Business Acquisitions, Goodwill and Acquired Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsTables</Role>
      <ShortName>Business Acquisitions, Goodwill and Acquired Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssets</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2327303 - Disclosure - Accounts Receivable and Unbilled Receivables (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/AccountsReceivableandUnbilledReceivablesTables</Role>
      <ShortName>Accounts Receivable and Unbilled Receivables (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/AccountsReceivableandUnbilledReceivables</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2330304 - Disclosure - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/InventoriesTables</Role>
      <ShortName>Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/Inventories</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2333305 - Disclosure - Supplemental Balance Sheet Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SupplementalBalanceSheetInformationTables</Role>
      <ShortName>Supplemental Balance Sheet Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SupplementalBalanceSheetInformation</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2337306 - Disclosure - Stockholders??? Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/StockholdersEquityTables</Role>
      <ShortName>Stockholders??? Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/StockholdersEquity</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2346307 - Disclosure - Long-Term Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/LongTermDebtTables</Role>
      <ShortName>Long-Term Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/LongTermDebt</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2351308 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/IncomeTaxes</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2358309 - Disclosure - Pension Plans and Postretirement Benefits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsTables</Role>
      <ShortName>Pension Plans and Postretirement Benefits (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/PensionPlansandPostretirementBenefits</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2370310 - Disclosure - Business Segments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessSegmentsTables</Role>
      <ShortName>Business Segments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessSegments</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2377311 - Disclosure - Lease Commitments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/LeaseCommitmentsTables</Role>
      <ShortName>Lease Commitments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/LeaseCommitments</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2402401 - Disclosure - Description of Business (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/DescriptionofBusinessDetails</Role>
      <ShortName>Description of Business (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/DescriptionofBusiness</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2406402 - Disclosure - Summary of Significant Accounting Policies (Accumulated Other Comprehensive Income) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesAccumulatedOtherComprehensiveIncomeDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Accumulated Other Comprehensive Income) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2407403 - Disclosure - Summary of Significant Accounting Policies (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2408404 - Disclosure - Summary of Significant Accounting Policies (Remaining Performance Obligation) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesRemainingPerformanceObligationDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Remaining Performance Obligation) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2409405 - Disclosure - Summary of Significant Accounting Policies (Product Warranty and Replacement Costs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesProductWarrantyandReplacementCostsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Product Warranty and Replacement Costs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2410406 - Disclosure - Summary of Significant Accounting Policies (Earnings Per Common Share) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesEarningsPerCommonShareDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Earnings Per Common Share) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2411407 - Disclosure - Summary of Significant Accounting Policies (Schedule of Notional Amounts of Outstanding Foreign Currency Contracts) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesScheduleofNotionalAmountsofOutstandingForeignCurrencyContractsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Schedule of Notional Amounts of Outstanding Foreign Currency Contracts) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2412408 - Disclosure - Summary of Significant Accounting Policies (Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesScheduleofDerivativeInstrumentsGainLossinStatementofFinancialPerformanceDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2413409 - Disclosure - Summary of Significant Accounting Policies (Fair Values of Derivative Financial Instruments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesFairValuesofDerivativeFinancialInstrumentsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Fair Values of Derivative Financial Instruments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2416410 - Disclosure - Business Acquisitions, Goodwill and Acquired Intangible Assets (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsNarrativeDetails</Role>
      <ShortName>Business Acquisitions, Goodwill and Acquired Intangible Assets (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2417411 - Disclosure - Business Acquisitions, Goodwill and Acquired Intangible Assets (Purchase Price) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsPurchasePriceDetails</Role>
      <ShortName>Business Acquisitions, Goodwill and Acquired Intangible Assets (Purchase Price) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2418412 - Disclosure - Business Acquisitions, Goodwill and Acquired Intangible Assets (Provisional Fair Values Allocated to Assets Acquired and Liabilities Assumed) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsProvisionalFairValuesAllocatedtoAssetsAcquiredandLiabilitiesAssumedDetails</Role>
      <ShortName>Business Acquisitions, Goodwill and Acquired Intangible Assets (Provisional Fair Values Allocated to Assets Acquired and Liabilities Assumed) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2419413 - Disclosure - Business Acquisitions, Goodwill and Acquired Intangible Assets (Schedule of Pro Forma Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsScheduleofProFormaInformationDetails</Role>
      <ShortName>Business Acquisitions, Goodwill and Acquired Intangible Assets (Schedule of Pro Forma Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2420414 - Disclosure - Business Acquisitions, Goodwill and Acquired Intangible Assets (Acquired Intangible Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsAcquiredIntangibleAssetsDetails</Role>
      <ShortName>Business Acquisitions, Goodwill and Acquired Intangible Assets (Acquired Intangible Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2421415 - Disclosure - Business Acquisitions, Goodwill and Acquired Intangible Assets (Goodwill) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsGoodwillDetails</Role>
      <ShortName>Business Acquisitions, Goodwill and Acquired Intangible Assets (Goodwill) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2422416 - Disclosure - Business Acquisitions, Goodwill and Acquired Intangible Assets (Other Acquired Intangible Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsOtherAcquiredIntangibleAssetsDetails</Role>
      <ShortName>Business Acquisitions, Goodwill and Acquired Intangible Assets (Other Acquired Intangible Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2423417 - Disclosure - Business Acquisitions, Goodwill and Acquired Intangible Assets (Remaining Useful Life) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsRemainingUsefulLifeDetails</Role>
      <ShortName>Business Acquisitions, Goodwill and Acquired Intangible Assets (Remaining Useful Life) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessAcquisitionsGoodwillandAcquiredIntangibleAssetsTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2425418 - Disclosure - Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/FinancialInstrumentsDetails</Role>
      <ShortName>Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/FinancialInstruments</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2428419 - Disclosure - Accounts Receivable and Unbilled Receivables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/AccountsReceivableandUnbilledReceivablesDetails</Role>
      <ShortName>Accounts Receivable and Unbilled Receivables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/AccountsReceivableandUnbilledReceivablesTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2431420 - Disclosure - Inventories (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/InventoriesDetails</Role>
      <ShortName>Inventories (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/InventoriesTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2434421 - Disclosure - Supplemental Balance Sheet Information (Property, Plant and Equipment) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SupplementalBalanceSheetInformationPropertyPlantandEquipmentDetails</Role>
      <ShortName>Supplemental Balance Sheet Information (Property, Plant and Equipment) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SupplementalBalanceSheetInformationTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2435422 - Disclosure - Supplemental Balance Sheet Information (Selected Balance Sheet) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SupplementalBalanceSheetInformationSelectedBalanceSheetDetails</Role>
      <ShortName>Supplemental Balance Sheet Information (Selected Balance Sheet) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SupplementalBalanceSheetInformationTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2438423 - Disclosure - Stockholders??? Equity (Common Stock Share Activity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/StockholdersEquityCommonStockShareActivityDetails</Role>
      <ShortName>Stockholders??? Equity (Common Stock Share Activity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/StockholdersEquityTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2439424 - Disclosure - Stockholders??? Equity (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/StockholdersEquityNarrativeDetails</Role>
      <ShortName>Stockholders??? Equity (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/StockholdersEquityTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2440425 - Disclosure - Stockholders??? Equity (Fair Value Assumptions) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/StockholdersEquityFairValueAssumptionsDetails</Role>
      <ShortName>Stockholders??? Equity (Fair Value Assumptions) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/StockholdersEquityTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2441426 - Disclosure - Stockholders??? Equity (Stock Option Plans) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/StockholdersEquityStockOptionPlansDetails</Role>
      <ShortName>Stockholders??? Equity (Stock Option Plans) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/StockholdersEquityTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2442427 - Disclosure - Stockholders??? Equity (Exercise Price Range) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/StockholdersEquityExercisePriceRangeDetails</Role>
      <ShortName>Stockholders??? Equity (Exercise Price Range) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/StockholdersEquityTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2443428 - Disclosure - Stockholders??? Equity (Nonvested Restricted Stock Activity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/StockholdersEquityNonvestedRestrictedStockActivityDetails</Role>
      <ShortName>Stockholders??? Equity (Nonvested Restricted Stock Activity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/StockholdersEquityTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2444429 - Disclosure - Stockholders??? Equity (Directors' Restricted Stock Activity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/StockholdersEquityDirectorsRestrictedStockActivityDetails</Role>
      <ShortName>Stockholders??? Equity (Directors' Restricted Stock Activity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/StockholdersEquityTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2447430 - Disclosure - Long-Term Debt (Summary of Long-Term Debt) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/LongTermDebtSummaryofLongTermDebtDetails</Role>
      <ShortName>Long-Term Debt (Summary of Long-Term Debt) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/LongTermDebtTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2448431 - Disclosure - Long-term Debt (Schedule of Maturities of Long-term Debt) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/LongtermDebtScheduleofMaturitiesofLongtermDebtDetails</Role>
      <ShortName>Long-term Debt (Schedule of Maturities of Long-term Debt) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2449432 - Disclosure - Long-Term Debt (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/LongTermDebtNarrativeDetails</Role>
      <ShortName>Long-Term Debt (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/LongTermDebtTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2452433 - Disclosure - Income Taxes (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/IncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/IncomeTaxesTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2453434 - Disclosure - Income Taxes (Income Tax Expense (Benefit) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/IncomeTaxesIncomeTaxExpenseBenefitDetails</Role>
      <ShortName>Income Taxes (Income Tax Expense (Benefit) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/IncomeTaxesTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2454435 - Disclosure - Income Taxes (Effective Income Tax Rate) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/IncomeTaxesEffectiveIncomeTaxRateDetails</Role>
      <ShortName>Income Taxes (Effective Income Tax Rate) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/IncomeTaxesTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2455436 - Disclosure - Income Taxes (Deferred Income Tax) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/IncomeTaxesDeferredIncomeTaxDetails</Role>
      <ShortName>Income Taxes (Deferred Income Tax) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/IncomeTaxesTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2456437 - Disclosure - Income Taxes (Unrecognized Tax Benefits) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/IncomeTaxesUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>Income Taxes (Unrecognized Tax Benefits) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/IncomeTaxesTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2459438 - Disclosure - Pension Plans and Postretirement Benefits (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsNarrativeDetails</Role>
      <ShortName>Pension Plans and Postretirement Benefits (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2460439 - Disclosure - Pension Plans and Postretirement Benefits (Net Periodic Pension Benefit (Income) Expense) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsNetPeriodicPensionBenefitIncomeExpenseDetails</Role>
      <ShortName>Pension Plans and Postretirement Benefits (Net Periodic Pension Benefit (Income) Expense) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2461440 - Disclosure - Pension Plans and Postretirement Benefits (Benefit Obligation and Net Benefit Cost) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsBenefitObligationandNetBenefitCostDetails</Role>
      <ShortName>Pension Plans and Postretirement Benefits (Benefit Obligation and Net Benefit Cost) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2462441 - Disclosure - Pension Plans and Postretirement Benefits (Schedule of Changes in Benefit Obligation) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsScheduleofChangesinBenefitObligationDetails</Role>
      <ShortName>Pension Plans and Postretirement Benefits (Schedule of Changes in Benefit Obligation) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsTables</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2463442 - Disclosure - Pension Plans and Postretirement Benefits (Changes in Plan Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsChangesinPlanAssetsDetails</Role>
      <ShortName>Pension Plans and Postretirement Benefits (Changes in Plan Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2464443 - Disclosure - Pension Plans and Postretirement Benefits (Funded Status) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsFundedStatusDetails</Role>
      <ShortName>Pension Plans and Postretirement Benefits (Funded Status) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsTables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2465444 - Disclosure - Pension Plans and Postretirement Benefits (Pension Plans with Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsPensionPlanswithAccumulatedBenefitObligationsinExcessofFairValueofPlanAssetsDetails</Role>
      <ShortName>Pension Plans and Postretirement Benefits (Pension Plans with Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsTables</ParentRole>
      <Position>81</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>2466445 - Disclosure - Pension Plans and Postretirement Benefits (Estimated Future Benefit Payments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsEstimatedFutureBenefitPaymentsDetails</Role>
      <ShortName>Pension Plans and Postretirement Benefits (Estimated Future Benefit Payments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsTables</ParentRole>
      <Position>82</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>2467446 - Disclosure - Pension Plans and Postretirement Benefits (Percentage of Plan Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsPercentageofPlanAssetsDetails</Role>
      <ShortName>Pension Plans and Postretirement Benefits (Percentage of Plan Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsTables</ParentRole>
      <Position>83</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>2468447 - Disclosure - Pension Plans and Postretirement Benefits (Schedule of Fair Value of Assets Category) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsScheduleofFairValueofAssetsCategoryDetails</Role>
      <ShortName>Pension Plans and Postretirement Benefits (Schedule of Fair Value of Assets Category) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/PensionPlansandPostretirementBenefitsTables</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>2471448 - Disclosure - Business Segments (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessSegmentsNarrativeDetails</Role>
      <ShortName>Business Segments (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessSegmentsTables</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>2472449 - Disclosure - Business Segments (Business Segments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessSegmentsBusinessSegmentsDetails</Role>
      <ShortName>Business Segments (Business Segments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessSegmentsTables</ParentRole>
      <Position>86</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>2473450 - Disclosure - Business Segments (Sales and Long-lived Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessSegmentsSalesandLonglivedAssetsDetails</Role>
      <ShortName>Business Segments (Sales and Long-lived Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessSegmentsTables</ParentRole>
      <Position>87</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>2474451 - Disclosure - Business Segments (Product Lines) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessSegmentsProductLinesDetails</Role>
      <ShortName>Business Segments (Product Lines) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessSegmentsTables</ParentRole>
      <Position>88</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>2475452 - Disclosure - Business Segments (Disaggregation of Revenue) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/BusinessSegmentsDisaggregationofRevenueDetails</Role>
      <ShortName>Business Segments (Disaggregation of Revenue) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/BusinessSegmentsTables</ParentRole>
      <Position>89</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>2478453 - Disclosure - Lease Commitments (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/LeaseCommitmentsNarrativeDetails</Role>
      <ShortName>Lease Commitments (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/LeaseCommitmentsTables</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>2479454 - Disclosure - Lease Commitments (Future Minimum Lease Payments for Operating Leases) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/LeaseCommitmentsFutureMinimumLeasePaymentsforOperatingLeasesDetails</Role>
      <ShortName>Lease Commitments (Future Minimum Lease Payments for Operating Leases) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/LeaseCommitmentsTables</ParentRole>
      <Position>91</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>2481455 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/CommitmentsandContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/CommitmentsandContingencies</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>2483456 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/SubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/SubsequentEvents</ParentRole>
      <Position>93</Position>
    </Report>
    <Report instance="tdy-20220102.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>2485457 - Disclosure - Schedule II Valuation and Qualifying Accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.teledyne.com/role/ScheduleIIValuationandQualifyingAccountsDetails</Role>
      <ShortName>Schedule II Valuation and Qualifying Accounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.teledyne.com/role/ScheduleIIValuationandQualifyingAccounts</ParentRole>
      <Position>94</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-K" original="tdy-20220102.htm">tdy-20220102.htm</File>
    <File>exhibit41-descriptionofsec.htm</File>
    <File>tdy-20220102.xsd</File>
    <File>tdy-20220102_cal.xml</File>
    <File>tdy-20220102_def.xml</File>
    <File>tdy-20220102_lab.xml</File>
    <File>tdy-20220102_pre.xml</File>
    <File>tdy-ex21subsidiariesoftele.htm</File>
    <File>tdy-ex231consentofdeloitte.htm</File>
    <File>tdy-ex241powerofattorney20.htm</File>
    <File>tdy-ex311_20220102xq4.htm</File>
    <File>tdy-ex312_20220102xq4.htm</File>
    <File>tdy-ex321_20220102xq4.htm</File>
    <File>tdy-ex322_20220102xq4.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="1813">http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy items="38">http://xbrl.sec.gov/dei/2021q4</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
