<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.20.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>158</ContextCount>
  <ElementCount>336</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>62</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>100010 - Statement - Condensed Consolidated Statements of Income (Loss) and Comprehensive (Loss) Income (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/StatementCondensedConsolidatedStatementsOfIncomeLossAndComprehensiveLossIncomeUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Income (Loss) and Comprehensive (Loss) Income (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>100020 - Statement - Condensed Consolidated Balance Sheets (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsUnaudited</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>100030 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsUnauditedParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>100040 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/StatementCondensedConsolidatedStatementsOfCashFlowsUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>100050 - Disclosure - Basis of Financial Statements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureBasisOfFinancialStatements</Role>
      <ShortName>Basis of Financial Statements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>100060 - Disclosure - Risks and Uncertainties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureRisksAndUncertainties</Role>
      <ShortName>Risks and Uncertainties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>100070 - Disclosure - New Accounting Standards</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureNewAccountingStandards</Role>
      <ShortName>New Accounting Standards</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>100080 - Disclosure - Derivative Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureDerivativeInstruments</Role>
      <ShortName>Derivative Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>100090 - Disclosure - Fair Value of Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureFairValueOfFinancialInstruments</Role>
      <ShortName>Fair Value of Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>100100 - Disclosure - Investment in Joint Ventures and Majority Owned Subsidiaries</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureInvestmentInJointVenturesAndMajorityOwnedSubsidiaries</Role>
      <ShortName>Investment in Joint Ventures and Majority Owned Subsidiaries</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>100110 - Disclosure - Equity Earnings of Joint Ventures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureEquityEarningsOfJointVentures</Role>
      <ShortName>Equity Earnings of Joint Ventures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>100120 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureLeases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>100130 - Disclosure - Credit Facilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureCreditFacilities</Role>
      <ShortName>Credit Facilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>100140 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>100150 - Disclosure - Shareholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureShareholdersEquity</Role>
      <ShortName>Shareholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>100160 - Disclosure - Revenue from Contracts with Customers</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureRevenueFromContractsWithCustomers</Role>
      <ShortName>Revenue from Contracts with Customers</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>100170 - Disclosure - Other Expense, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureOtherExpenseNet</Role>
      <ShortName>Other Expense, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>100180 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>100190 - Disclosure - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureEarningsPerShare</Role>
      <ShortName>Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>100200 - Disclosure - Stock-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureStockBasedCompensation</Role>
      <ShortName>Stock-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>100210 - Disclosure - Pension and Postretirement Benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosurePensionAndPostretirementBenefits</Role>
      <ShortName>Pension and Postretirement Benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>100220 - Disclosure - Accumulated Other Comprehensive Loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureAccumulatedOtherComprehensiveLoss</Role>
      <ShortName>Accumulated Other Comprehensive Loss</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>100230 - Disclosure -  Derivative Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureDerivativeInstrumentsTables</Role>
      <ShortName>Derivative Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureDerivativeInstruments</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>100240 - Disclosure - Fair Value of Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsTables</Role>
      <ShortName>Fair Value of Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureFairValueOfFinancialInstruments</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>100250 - Disclosure - Equity Earnings of Joint Ventures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureEquityEarningsOfJointVenturesTables</Role>
      <ShortName>Equity Earnings of Joint Ventures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureEquityEarningsOfJointVentures</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>100260 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureLeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureLeases</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>100270 - Disclosure - Credit Facilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureCreditFacilitiesTables</Role>
      <ShortName>Credit Facilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureCreditFacilities</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>100280 - Disclosure - Shareholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureShareholdersEquityTables</Role>
      <ShortName>Shareholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureShareholdersEquity</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>100290 - Disclosure - Revenue from Contracts with Customers (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureRevenueFromContractsWithCustomersTables</Role>
      <ShortName>Revenue from Contracts with Customers (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureRevenueFromContractsWithCustomers</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>100300 - Disclosure - Other Expense, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureOtherExpenseNetTables</Role>
      <ShortName>Other Expense, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureOtherExpenseNet</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>100310 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureEarningsPerShareTables</Role>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureEarningsPerShare</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>100320 - Disclosure - Stock-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureStockBasedCompensationTables</Role>
      <ShortName>Stock-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureStockBasedCompensation</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>100330 - Disclosure - Pension and Postretirement Benefits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosurePensionAndPostretirementBenefitsTables</Role>
      <ShortName>Pension and Postretirement Benefits (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosurePensionAndPostretirementBenefits</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>100340 - Disclosure - Accumulated Other Comprehensive Loss (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureAccumulatedOtherComprehensiveLossTables</Role>
      <ShortName>Accumulated Other Comprehensive Loss (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureAccumulatedOtherComprehensiveLoss</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>100350 - Disclosure - Basis of Financial Statements (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureBasisOfFinancialStatementsDetailsTextual</Role>
      <ShortName>Basis of Financial Statements (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureBasisOfFinancialStatements</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>100360 - Disclosure - Derivative Instruments - Schedule of Quantification of Outstanding Mexican Peso Forward Contracts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureDerivativeInstrumentsScheduleOfQuantificationOfOutstandingMexicanPesoForwardContractsDetails</Role>
      <ShortName>Derivative Instruments - Schedule of Quantification of Outstanding Mexican Peso Forward Contracts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>100370 - Disclosure - Derivative Instruments - Fair Market Value of All Outstanding Peso Forward Contracts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureDerivativeInstrumentsFairMarketValueOfAllOutstandingPesoForwardContractsDetails</Role>
      <ShortName>Derivative Instruments - Fair Market Value of All Outstanding Peso Forward Contracts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>100380 - Disclosure - Derivative Instruments - Pre-Tax Effects of the Peso Forward Contracts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureDerivativeInstrumentsPreTaxEffectsOfPesoForwardContractsDetails</Role>
      <ShortName>Derivative Instruments - Pre-Tax Effects of the Peso Forward Contracts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>100390 - Disclosure - Fair Value of Financial Instruments - Summary of Financial Assets and Liabilities at Fair Value on Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsSummaryOfFinancialAssetsAndLiabilitiesAtFairValueOnRecurringBasisDetails</Role>
      <ShortName>Fair Value of Financial Instruments - Summary of Financial Assets and Liabilities at Fair Value on Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>100400 - Disclosure - Investment in Joint Ventures and Majority Owned Subsidiaries (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureInvestmentInJointVenturesAndMajorityOwnedSubsidiariesDetailsTextual</Role>
      <ShortName>Investment in Joint Ventures and Majority Owned Subsidiaries (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureInvestmentInJointVenturesAndMajorityOwnedSubsidiaries</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>100410 - Disclosure - Equity Earnings of Joint Ventures (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureEquityEarningsOfJointVenturesDetailsTextual</Role>
      <ShortName>Equity Earnings of Joint Ventures (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureEquityEarningsOfJointVenturesTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>100420 - Disclosure - Equity Earnings of Joint Ventures - Summarized Statements of Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureEquityEarningsOfJointVenturesSummarizedStatementsOfOperationsDetails</Role>
      <ShortName>Equity Earnings of Joint Ventures - Summarized Statements of Operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>100430 - Disclosure - Equity Earnings of Joint Ventures- Summarize of Related Party Transaction (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureEquityEarningsOfJointVenturesSummarizeOfRelatedPartyTransactionDetails</Role>
      <ShortName>Equity Earnings of Joint Ventures- Summarize of Related Party Transaction (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>100440 - Disclosure - Leases (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureLeasesDetailsTextual</Role>
      <ShortName>Leases (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureLeasesTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>100450 - Disclosure - Leases - Schedule of Operating Lease Asset and Obligation Included in Condensed Consolidated Balance Sheet (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureLeasesScheduleOfOperatingLeaseAssetAndObligationIncludedInCondensedConsolidatedBalanceSheetDetails</Role>
      <ShortName>Leases - Schedule of Operating Lease Asset and Obligation Included in Condensed Consolidated Balance Sheet (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>100460 - Disclosure - Leases - Schedule of Future Minimum Lease Payments Under Non-Cancelable Lease Including Options to Extend (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureLeasesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableLeaseIncludingOptionsToExtendDetails</Role>
      <ShortName>Leases - Schedule of Future Minimum Lease Payments Under Non-Cancelable Lease Including Options to Extend (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>100480 - Disclosure - Leases - Schedule of Cash Flow Information Related to Operating Lease (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureLeasesScheduleOfCashFlowInformationRelatedToOperatingLeaseDetails</Role>
      <ShortName>Leases - Schedule of Cash Flow Information Related to Operating Lease (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>100490 - Disclosure - Leases - Schedule of Weighted Average Lease Term and Discount Rate for Operating Lease (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureLeasesScheduleOfWeightedAverageLeaseTermAndDiscountRateForOperatingLeaseDetails</Role>
      <ShortName>Leases - Schedule of Weighted Average Lease Term and Discount Rate for Operating Lease (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>100500 - Disclosure - Credit Facilities (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureCreditFacilitiesDetailsTextual</Role>
      <ShortName>Credit Facilities (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureCreditFacilitiesTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>100510 - Disclosure - Credit Facilities - Schedule of Outstanding Borrowings Under the Credit Facilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureCreditFacilitiesScheduleOfOutstandingBorrowingsUnderCreditFacilitiesDetails</Role>
      <ShortName>Credit Facilities - Schedule of Outstanding Borrowings Under the Credit Facilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>100520 - Disclosure - Credit Facilities - Schedule of Average Outstanding Borrowings and the Weighted Average Interest Rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureCreditFacilitiesScheduleOfAverageOutstandingBorrowingsAndWeightedAverageInterestRateDetails</Role>
      <ShortName>Credit Facilities - Schedule of Average Outstanding Borrowings and the Weighted Average Interest Rate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>100530 - Disclosure - Commitments and Contingencies (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureCommitmentsAndContingenciesDetailsTextual</Role>
      <ShortName>Commitments and Contingencies (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>100540 - Disclosure - Shareholders' Equity - Summary of Activity Impacting Shareholders' Equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureShareholdersEquitySummaryOfActivityImpactingShareholdersEquityDetails</Role>
      <ShortName>Shareholders' Equity - Summary of Activity Impacting Shareholders' Equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>100550 - Disclosure - Revenue from Contracts with Customers - Contract Liability Balances (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureRevenueFromContractsWithCustomersContractLiabilityBalancesDetails</Role>
      <ShortName>Revenue from Contracts with Customers - Contract Liability Balances (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>100560 - Disclosure - Revenue from Contracts with Customers - Revenue by Product Group (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureRevenueFromContractsWithCustomersRevenueByProductGroupDetails</Role>
      <ShortName>Revenue from Contracts with Customers - Revenue by Product Group (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>100570 - Disclosure - Revenue from Contracts with Customers - Revenue by Customer or Customer Group (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureRevenueFromContractsWithCustomersRevenueByCustomerOrCustomerGroupDetails</Role>
      <ShortName>Revenue from Contracts with Customers - Revenue by Customer or Customer Group (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>100580 - Disclosure - Other Expense, Net - Summary of Other Expense, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureOtherExpenseNetSummaryOfOtherExpenseNetDetails</Role>
      <ShortName>Other Expense, Net - Summary of Other Expense, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>100590 - Disclosure - Income Taxes (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureIncomeTaxesDetailsTextual</Role>
      <ShortName>Income Taxes (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureIncomeTaxes</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>100600 - Disclosure - Earnings Per Share - Reconciliation of the Components of Basic and Diluted Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureEarningsPerShareReconciliationOfComponentsOfBasicAndDilutedPerShareDetails</Role>
      <ShortName>Earnings Per Share - Reconciliation of the Components of Basic and Diluted Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>100610 - Disclosure - Earnings Per Share (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureEarningsPerShareDetailsTextual</Role>
      <ShortName>Earnings Per Share (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureEarningsPerShareTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>100620 - Disclosure - Stock-Based Compensation (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureStockBasedCompensationDetailsTextual</Role>
      <ShortName>Stock-Based Compensation (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>100630 - Disclosure - Stock-Based Compensation - Summary of Stock Option Activity Under Our Stock Incentive Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockOptionActivityUnderOurStockIncentivePlanDetails</Role>
      <ShortName>Stock-Based Compensation - Summary of Stock Option Activity Under Our Stock Incentive Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>100640 - Disclosure - Stock-Based Compensation - Intrinsic Value of Stock Options Exercised and the Fair Value of Stock Options Vested (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureStockBasedCompensationIntrinsicValueOfStockOptionsExercisedAndFairValueOfStockOptionsVestedDetails</Role>
      <ShortName>Stock-Based Compensation - Intrinsic Value of Stock Options Exercised and the Fair Value of Stock Options Vested (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>100650 - Disclosure - Stock-Based Compensation - Summary of Restricted Stock Activity Under Our Stock Incentive Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureStockBasedCompensationSummaryOfRestrictedStockActivityUnderOurStockIncentivePlanDetails</Role>
      <ShortName>Stock-Based Compensation - Summary of Restricted Stock Activity Under Our Stock Incentive Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>100660 - Disclosure - Pension and Postretirement Benefits (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosurePensionAndPostretirementBenefitsDetailsTextual</Role>
      <ShortName>Pension and Postretirement Benefits (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.strattec.com/20200927/taxonomy/role/DisclosurePensionAndPostretirementBenefitsTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>100670 - Disclosure - Pension and Postretirement Benefits - Summary of Net Periodic Benefit Cost Recognized (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosurePensionAndPostretirementBenefitsSummaryOfNetPeriodicBenefitCostRecognizedDetails</Role>
      <ShortName>Pension and Postretirement Benefits - Summary of Net Periodic Benefit Cost Recognized (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="strt-10q_20200927.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>100680 - Disclosure - Accumulated Other Comprehensive Loss - Summary of Changes in Accumulated Other Comprehensive Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.strattec.com/20200927/taxonomy/role/DisclosureAccumulatedOtherComprehensiveLossSummaryOfChangesInAccumulatedOtherComprehensiveLossDetails</Role>
      <ShortName>Accumulated Other Comprehensive Loss - Summary of Changes in Accumulated Other Comprehensive Loss (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</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-Q" original="strt-10q_20200927.htm">strt-10q_20200927.htm</File>
    <File>strt-20200927.xsd</File>
    <File>strt-20200927_cal.xml</File>
    <File>strt-20200927_def.xml</File>
    <File>strt-20200927_lab.xml</File>
    <File>strt-20200927_pre.xml</File>
    <File>strt-ex102_160.htm</File>
    <File>strt-ex311_8.htm</File>
    <File>strt-ex312_7.htm</File>
    <File>strt-ex32_6.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/country/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2020-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
