<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.20.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>277</ContextCount>
  <ElementCount>536</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>77</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001000 - Document - Document and Entity Information Document</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/DocumentAndEntityInformationDocument</Role>
      <ShortName>Document and Entity Information Document</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001000 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1001001 - Statement - Consolidated Balance Sheets Parentheticals</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/ConsolidatedBalanceSheetsParentheticals</Role>
      <ShortName>Consolidated Balance Sheets Parentheticals</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1002000 - Statement - Consolidated Statements of Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/ConsolidatedStatementsOfIncome</Role>
      <ShortName>Consolidated Statements of Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1003000 - Statement - Consolidated Statements of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/ConsolidatedStatementsOfComprehensiveIncome</Role>
      <ShortName>Consolidated Statements of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1004000 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1005000 - Statement - Consolidated Statements of Share Owners' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/ConsolidatedStatementsOfShareOwnersEquity</Role>
      <ShortName>Consolidated Statements of Share Owners' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1005001 - Statement - Consolidated Statements of Share Owners' Equity Parentheticals</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/ConsolidatedStatementsOfShareOwnersEquityParentheticals</Role>
      <ShortName>Consolidated Statements of Share Owners' Equity Parentheticals</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2101100 - Disclosure - Note 1. Business Description and Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Note 1. Business Description and Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2110100 - Disclosure - Note 2. Acquisitions (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note2AcquisitionsNotes</Role>
      <ShortName>Note 2. Acquisitions (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2113100 - Disclosure - Note 3. Revenue from Contracts with Customers (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note3RevenueFromContractsWithCustomersNotes</Role>
      <ShortName>Note 3. Revenue from Contracts with Customers (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2116100 - Disclosure - Note 4. Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note4Inventories</Role>
      <ShortName>Note 4. Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2119100 - Disclosure - Note 5. Property and Equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note5PropertyAndEquipment</Role>
      <ShortName>Note 5. Property and Equipment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2122100 - Disclosure - Note 6. Goodwill and Other Intangible Assets (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note6GoodwillAndOtherIntangibleAssetsNotes</Role>
      <ShortName>Note 6. Goodwill and Other Intangible Assets (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2125100 - Disclosure - Note 7. Commitments and Contingent Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note7CommitmentsAndContingentLiabilities</Role>
      <ShortName>Note 7. Commitments and Contingent Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2128100 - Disclosure - Note 8. Credit Facilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note8CreditFacilities</Role>
      <ShortName>Note 8. Credit Facilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2131100 - Disclosure - Note 9. Employee Benefit Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note9EmployeeBenefitPlans</Role>
      <ShortName>Note 9. Employee Benefit Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2134100 - Disclosure - Note 10. Stock Compensation Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note10StockCompensationPlans</Role>
      <ShortName>Note 10. Stock Compensation Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2137100 - Disclosure - Note 11. Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note11IncomeTaxes</Role>
      <ShortName>Note 11. Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2140100 - Disclosure - Note 12. Share Owners' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note12ShareOwnersEquity</Role>
      <ShortName>Note 12. Share Owners' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2143100 - Disclosure - Note 13. Fair Value</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note13FairValue</Role>
      <ShortName>Note 13. Fair Value</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2146100 - Disclosure - Note 14. Derivative Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note14DerivativeInstruments</Role>
      <ShortName>Note 14. Derivative Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2149100 - Disclosure - Note 15. Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note15Investments</Role>
      <ShortName>Note 15. Investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2152100 - Disclosure - Note 16. Accrued Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note16AccruedExpenses</Role>
      <ShortName>Note 16. Accrued Expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2155100 - Disclosure - Note 17. Geographic Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note17GeographicInformation</Role>
      <ShortName>Note 17. Geographic Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2164100 - Disclosure - Note 18. Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note18EarningsPerShare</Role>
      <ShortName>Note 18. Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2166100 - Disclosure - Note 19. Accumulated Other Comprehensive Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note19AccumulatedOtherComprehensiveIncomeLoss</Role>
      <ShortName>Note 19. Accumulated Other Comprehensive Income (Loss)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2167100 - Disclosure - Note 20. Leases (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note20LeasesNotes</Role>
      <ShortName>Note 20. Leases (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2169100 - Disclosure - Note 21. Quarterly Financial Information (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note21QuarterlyFinancialInformationUnaudited</Role>
      <ShortName>Note 21. Quarterly Financial Information (Unaudited)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2170100 - Disclosure - Schedule II Valuation and Qualifying Accounts</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/ScheduleIiValuationAndQualifyingAccounts</Role>
      <ShortName>Schedule II Valuation and Qualifying Accounts</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2201201 - Disclosure - Note 1. Business Description and Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Note 1. Business Description and Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2210201 - Disclosure - Note 2. Acquisitions Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note2AcquisitionsPoliciesPolicies</Role>
      <ShortName>Note 2. Acquisitions Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2213201 - Disclosure - Note 3. Revenue from Contracts with Customers (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note3RevenueFromContractsWithCustomersPolicies</Role>
      <ShortName>Note 3. Revenue from Contracts with Customers (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2222201 - Disclosure - Note 6. Goodwill and Other Intangible Assets Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note6GoodwillAndOtherIntangibleAssetsPoliciesPolicies</Role>
      <ShortName>Note 6. Goodwill and Other Intangible Assets Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2225201 - Disclosure - Note 7. Commitments and Contingent Liabilities (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note7CommitmentsAndContingentLiabilitiesPolicies</Role>
      <ShortName>Note 7. Commitments and Contingent Liabilities (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2228201 - Disclosure - Note 8. Credit Facilities (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note8CreditFacilitiesPolicies</Role>
      <ShortName>Note 8. Credit Facilities (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2231201 - Disclosure - Note 9. Employee Benefit Plans (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note9EmployeeBenefitPlansPolicies</Role>
      <ShortName>Note 9. Employee Benefit Plans (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2243201 - Disclosure - Note 13. Fair Value (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note13FairValuePolicies</Role>
      <ShortName>Note 13. Fair Value (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2246201 - Disclosure - Note 14. Derivative Instruments (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note14DerivativeInstrumentsPolicies</Role>
      <ShortName>Note 14. Derivative Instruments (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2249201 - Disclosure - Note 15. Investments (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note15InvestmentsPolicies</Role>
      <ShortName>Note 15. Investments (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2301302 - Disclosure - Note 1. Business Description and Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Note 1. Business Description and Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2310302 - Disclosure - Note 2. Acquisitions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note2AcquisitionsTables</Role>
      <ShortName>Note 2. Acquisitions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note2AcquisitionsNotes</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2313302 - Disclosure - Note 3. Revenue from Contracts with Customers (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note3RevenueFromContractsWithCustomersTables</Role>
      <ShortName>Note 3. Revenue from Contracts with Customers (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note3RevenueFromContractsWithCustomersNotes</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2316301 - Disclosure - Note 4. Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note4InventoriesTables</Role>
      <ShortName>Note 4. Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note4Inventories</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2319301 - Disclosure - Note 5. Property and Equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note5PropertyAndEquipmentTables</Role>
      <ShortName>Note 5. Property and Equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note5PropertyAndEquipment</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2322302 - Disclosure - Note 6. Goodwill and Other Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note6GoodwillAndOtherIntangibleAssetsTables</Role>
      <ShortName>Note 6. Goodwill and Other Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note6GoodwillAndOtherIntangibleAssetsNotes</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2325302 - Disclosure - Note 7. Commitments and Contingent Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note7CommitmentsAndContingentLiabilitiesTables</Role>
      <ShortName>Note 7. Commitments and Contingent Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note7CommitmentsAndContingentLiabilities</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2328302 - Disclosure - Note 8. Credit Facilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note8CreditFacilitiesTables</Role>
      <ShortName>Note 8. Credit Facilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note8CreditFacilities</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2334301 - Disclosure - Note 10. Stock Compensation Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note10StockCompensationPlansTables</Role>
      <ShortName>Note 10. Stock Compensation Plans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note10StockCompensationPlans</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2337301 - Disclosure - Note 11. Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note11IncomeTaxesTables</Role>
      <ShortName>Note 11. Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note11IncomeTaxes</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2343302 - Disclosure - Note 13. Fair Value (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note13FairValueTables</Role>
      <ShortName>Note 13. Fair Value (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note13FairValue</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2346302 - Disclosure - Note 14. Derivative Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note14DerivativeInstrumentsTables</Role>
      <ShortName>Note 14. Derivative Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note14DerivativeInstruments</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2349302 - Disclosure - Note 15. Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note15InvestmentsTables</Role>
      <ShortName>Note 15. Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note15Investments</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2352301 - Disclosure - Note 16. Accrued Expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note16AccruedExpensesTables</Role>
      <ShortName>Note 16. Accrued Expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note16AccruedExpenses</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2355302 - Disclosure - Note 17. Geographic Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note17GeographicInformationTables</Role>
      <ShortName>Note 17. Geographic Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note17GeographicInformation</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2364301 - Disclosure - Note 18. Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note18EarningsPerShareTables</Role>
      <ShortName>Note 18. Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note18EarningsPerShare</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2366301 - Disclosure - Note 19. Accumulated Other Comprehensive Income (Loss) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note19AccumulatedOtherComprehensiveIncomeLossTables</Role>
      <ShortName>Note 19. Accumulated Other Comprehensive Income (Loss) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note19AccumulatedOtherComprehensiveIncomeLoss</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2367301 - Disclosure - Note 20. Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note20LeasesTables</Role>
      <ShortName>Note 20. Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note20LeasesNotes</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2369301 - Disclosure - Note 21. Quarterly Financial Information (Unaudited) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note21QuarterlyFinancialInformationUnauditedTables</Role>
      <ShortName>Note 21. Quarterly Financial Information (Unaudited) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note21QuarterlyFinancialInformationUnaudited</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2370301 - Disclosure - Schedule II Valuation and Qualifying Accounts (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/ScheduleIiValuationAndQualifyingAccountsTables</Role>
      <ShortName>Schedule II Valuation and Qualifying Accounts (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/ScheduleIiValuationAndQualifyingAccounts</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2401403 - Disclosure - Note 1. Business Description and Summary of Significant Accounting Policies - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPoliciesTextualsDetails</Role>
      <ShortName>Note 1. Business Description and Summary of Significant Accounting Policies - Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2401404 - Disclosure - Note 1. Business Description and Summary of Significant Accounting Policies - Summary of Concentration Risk (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note1BusinessDescriptionAndSummaryOfSignificantAccountingPoliciesSummaryOfConcentrationRiskDetails</Role>
      <ShortName>Note 1. Business Description and Summary of Significant Accounting Policies - Summary of Concentration Risk (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2410403 - Disclosure - Note 2. Acquisitions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note2AcquisitionsDetails</Role>
      <ShortName>Note 2. Acquisitions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note2AcquisitionsTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2413403 - Disclosure - Note 3. Revenue from Contracts with Customers (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note3RevenueFromContractsWithCustomersDetails</Role>
      <ShortName>Note 3. Revenue from Contracts with Customers (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note3RevenueFromContractsWithCustomersTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2416403 - Disclosure - Note 4. Inventories - Inventory Components (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note4InventoriesInventoryComponentsDetails</Role>
      <ShortName>Note 4. Inventories - Inventory Components (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2419402 - Disclosure - Note 5. Property and Equipment - Property and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note5PropertyAndEquipmentPropertyAndEquipmentDetails</Role>
      <ShortName>Note 5. Property and Equipment - Property and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2419403 - Disclosure - Note 5. Property and Equipment - Asset Lives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note5PropertyAndEquipmentAssetLivesDetails</Role>
      <ShortName>Note 5. Property and Equipment - Asset Lives (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2419404 - Disclosure - Note 5. Property and Equipment - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note5PropertyAndEquipmentTextualsDetails</Role>
      <ShortName>Note 5. Property and Equipment - Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2422403 - Disclosure - Note 6. Goodwill and Other Intangible Assets Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note6GoodwillAndOtherIntangibleAssetsGoodwillDetails</Role>
      <ShortName>Note 6. Goodwill and Other Intangible Assets Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note6GoodwillAndOtherIntangibleAssetsTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2422404 - Disclosure - Note 6. Goodwill and Other Intangible Assets Finite-Lived Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note6GoodwillAndOtherIntangibleAssetsFiniteLivedIntangibleAssetsDetails</Role>
      <ShortName>Note 6. Goodwill and Other Intangible Assets Finite-Lived Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2425403 - Disclosure - Note 7. Commitments and Contingent Liabilities - Guarantees Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note7CommitmentsAndContingentLiabilitiesGuaranteesTextualsDetails</Role>
      <ShortName>Note 7. Commitments and Contingent Liabilities - Guarantees Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2425404 - Disclosure - Note 7. Commitments and Contingent Liabilities - Product Warranties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note7CommitmentsAndContingentLiabilitiesProductWarrantiesDetails</Role>
      <ShortName>Note 7. Commitments and Contingent Liabilities - Product Warranties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2428403 - Disclosure - Note 8. Credit Facilities - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note8CreditFacilitiesTextualsDetails</Role>
      <ShortName>Note 8. Credit Facilities - Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2428404 - Disclosure - Note 8. Credit Facilities - Primary and Secondary Credit Facility Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note8CreditFacilitiesPrimaryAndSecondaryCreditFacilityTextualsDetails</Role>
      <ShortName>Note 8. Credit Facilities - Primary and Secondary Credit Facility Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2431403 - Disclosure - Note 9. Employee Benefit Plans - Retirement Plans Textuals for Defined Contribution Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note9EmployeeBenefitPlansRetirementPlansTextualsForDefinedContributionPlanDetails</Role>
      <ShortName>Note 9. Employee Benefit Plans - Retirement Plans Textuals for Defined Contribution Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2431404 - Disclosure - Note 9. Employee Benefit Plans - Postemployment Plans Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note9EmployeeBenefitPlansPostemploymentPlansTextualsDetails</Role>
      <ShortName>Note 9. Employee Benefit Plans - Postemployment Plans Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2434402 - Disclosure - Note 10. Stock Compensation Plans - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note10StockCompensationPlansTextualsDetails</Role>
      <ShortName>Note 10. Stock Compensation Plans - Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2434403 - Disclosure - Note 10. Stock Compensation Plans - Performance Share Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note10StockCompensationPlansPerformanceShareActivityDetails</Role>
      <ShortName>Note 10. Stock Compensation Plans - Performance Share Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2434404 - Disclosure - Note 10. Stock Compensation Plans - Performance Shares Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note10StockCompensationPlansPerformanceSharesTextualsDetails</Role>
      <ShortName>Note 10. Stock Compensation Plans - Performance Shares Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2434405 - Disclosure - Note 10. Stock Compensation Plans - Unrestricted Share Grants Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note10StockCompensationPlansUnrestrictedShareGrantsTextualsDetails</Role>
      <ShortName>Note 10. Stock Compensation Plans - Unrestricted Share Grants Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2434406 - Disclosure - Note 10. Stock Compensation Plans Deferred Share Units (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note10StockCompensationPlansDeferredShareUnitsDetails</Role>
      <ShortName>Note 10. Stock Compensation Plans Deferred Share Units (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>2437402 - Disclosure - Note 11. Income Taxes - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note11IncomeTaxesTextualsDetails</Role>
      <ShortName>Note 11. Income Taxes - Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>2437403 - Disclosure - Note 11. Income Taxes - Components of Deferred Tax Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note11IncomeTaxesComponentsOfDeferredTaxAssetsAndLiabilitiesDetails</Role>
      <ShortName>Note 11. Income Taxes - Components of Deferred Tax Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>2437404 - Disclosure - Note 11. Income Taxes - Components of Income Before Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note11IncomeTaxesComponentsOfIncomeBeforeTaxesDetails</Role>
      <ShortName>Note 11. Income Taxes - Components of Income Before Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>2437405 - Disclosure - Note 11. Income Taxes - Components of Provision for Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note11IncomeTaxesComponentsOfProvisionForIncomeTaxesDetails</Role>
      <ShortName>Note 11. Income Taxes - Components of Provision for Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>2437406 - Disclosure - Note 11. Income Taxes - Reconciliation of Effective Income Tax Rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note11IncomeTaxesReconciliationOfEffectiveIncomeTaxRateDetails</Role>
      <ShortName>Note 11. Income Taxes - Reconciliation of Effective Income Tax Rate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>2437407 - Disclosure - Note 11. Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note11IncomeTaxesReconciliationOfUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>Note 11. Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>2437408 - Disclosure - Note 11. Income Taxes - Accrued Interest and Penalties Related to Unrecognized Tax Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note11IncomeTaxesAccruedInterestAndPenaltiesRelatedToUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>Note 11. Income Taxes - Accrued Interest and Penalties Related to Unrecognized Tax Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>2440402 - Disclosure - Note 12. Share Owners' Equity - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note12ShareOwnersEquityTextualsDetails</Role>
      <ShortName>Note 12. Share Owners' Equity - Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>2443403 - Disclosure - Note 13. Fair Value - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note13FairValueTextualsDetails</Role>
      <ShortName>Note 13. Fair Value - Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>2443404 - Disclosure - Note 13. Fair Value - Recurring Fair Value Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note13FairValueRecurringFairValueMeasurementsDetails</Role>
      <ShortName>Note 13. Fair Value - Recurring Fair Value Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>2446403 - Disclosure - Note 14. Derivative Instruments - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note14DerivativeInstrumentsTextualsDetails</Role>
      <ShortName>Note 14. Derivative Instruments - Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>2446404 - Disclosure - Note 14. Derivative Instruments - Fair Values of Derivative Instruments on the Consolidated Balance Sheets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note14DerivativeInstrumentsFairValuesOfDerivativeInstrumentsOnConsolidatedBalanceSheetsDetails</Role>
      <ShortName>Note 14. Derivative Instruments - Fair Values of Derivative Instruments on the Consolidated Balance Sheets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>2446405 - Disclosure - Note 14. Derivative Instruments - The Effect of Derivative Instruments on Other Comprehensive Income (Loss) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note14DerivativeInstrumentsEffectOfDerivativeInstrumentsOnOtherComprehensiveIncomeLossDetails</Role>
      <ShortName>Note 14. Derivative Instruments - The Effect of Derivative Instruments on Other Comprehensive Income (Loss) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>2446406 - Disclosure - Note 14. Derivative Instruments - The Effect of Derivative Instruments on Consolidated Statements of Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note14DerivativeInstrumentsEffectOfDerivativeInstrumentsOnConsolidatedStatementsOfIncomeDetails</Role>
      <ShortName>Note 14. Derivative Instruments - The Effect of Derivative Instruments on Consolidated Statements of Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>2449404 - Disclosure - Note 15. Investments - Investments-Supplemental Employee Retirement Plan Investments Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note15InvestmentsInvestmentsSupplementalEmployeeRetirementPlanInvestmentsTextualsDetails</Role>
      <ShortName>Note 15. Investments - Investments-Supplemental Employee Retirement Plan Investments Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>2449405 - Disclosure - Note 15. Investments - Supplemental Employee Retirement Plan Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note15InvestmentsSupplementalEmployeeRetirementPlanInvestmentsDetails</Role>
      <ShortName>Note 15. Investments - Supplemental Employee Retirement Plan Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>2452402 - Disclosure - Note 16. Accrued Expenses - Accrued Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note16AccruedExpensesAccruedExpensesDetails</Role>
      <ShortName>Note 16. Accrued Expenses - Accrued Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>2455404 - Disclosure - Note 17. Geographic Information - Segments, Geographic Areas (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note17GeographicInformationSegmentsGeographicAreasDetails</Role>
      <ShortName>Note 17. Geographic Information - Segments, Geographic Areas (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>2464402 - Disclosure - Note 18. Earnings Per Share Statement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note18EarningsPerShareStatementDetails</Role>
      <ShortName>Note 18. Earnings Per Share Statement (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>2466402 - Disclosure - Note 19. Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note19AccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails</Role>
      <ShortName>Note 19. Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note19AccumulatedOtherComprehensiveIncomeLossTables</ParentRole>
      <Position>101</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>2466403 - Disclosure - Note 19. Accumulated Other Comprehensive Income (Loss) - Reclassification from Accumulated Other Comprehensive Income (Loss) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note19AccumulatedOtherComprehensiveIncomeLossReclassificationFromAccumulatedOtherComprehensiveIncomeLossDetails</Role>
      <ShortName>Note 19. Accumulated Other Comprehensive Income (Loss) - Reclassification from Accumulated Other Comprehensive Income (Loss) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note19AccumulatedOtherComprehensiveIncomeLossTables</ParentRole>
      <Position>102</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>2467402 - Disclosure - Note 20. Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note20LeasesDetails</Role>
      <ShortName>Note 20. Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note20LeasesTables</ParentRole>
      <Position>103</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>2469402 - Disclosure - Note 21. Quarterly Financial Information (Unaudited) - Quarterly Financial Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/Note21QuarterlyFinancialInformationUnauditedQuarterlyFinancialInformationDetails</Role>
      <ShortName>Note 21. Quarterly Financial Information (Unaudited) - Quarterly Financial Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/Note21QuarterlyFinancialInformationUnauditedTables</ParentRole>
      <Position>104</Position>
    </Report>
    <Report instance="ke-20200630.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>2470402 - Disclosure - Schedule II Valuation and Qualifying Accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimballelectronics.com/role/ScheduleIiValuationAndQualifyingAccountsDetails</Role>
      <ShortName>Schedule II Valuation and Qualifying Accounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kimballelectronics.com/role/ScheduleIiValuationAndQualifyingAccountsTables</ParentRole>
      <Position>105</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>ke-20200630.xml</File>
    <File>ke-20200630.xsd</File>
    <File>ke-20200630_cal.xml</File>
    <File>ke-20200630_def.xml</File>
    <File>ke-20200630_lab.xml</File>
    <File>ke-20200630_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/us-gaap/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2018-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/country/2017-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2019-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
