<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.20.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>205</ContextCount>
  <ElementCount>364</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>57</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001001 - Document - Document and Entity Information Document</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/DocumentandEntityInformationDocument</Role>
      <ShortName>Document and Entity Information Document</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001002 - Statement - Condensed Consolidated Balance Sheets (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/CondensedConsolidatedBalanceSheetsUnaudited</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1003003 - Statement - Condensed Consolidated Statements of Income (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/CondensedConsolidatedStatementsofIncomeUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Income (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1004004 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/CondensedConsolidatedStatementsofComprehensiveIncomeUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Comprehensive Income (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1005005 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1007006 - Statement - Condensed Consolidated Statement of Shareowners' Equity (unaudited) Statement</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/CondensedConsolidatedStatementofShareownersEquityunauditedStatement</Role>
      <ShortName>Condensed Consolidated Statement of Shareowners' Equity (unaudited) Statement</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1402401 - Statement - Condensed Consolidated Balance Sheets (unaudited) Parentheticals</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/CondensedConsolidatedBalanceSheetsunauditedParentheticals</Role>
      <ShortName>Condensed Consolidated Balance Sheets (unaudited) Parentheticals</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1406402 - Statement - Condensed Consolidated Statements of Cash Flows (unaudited) - Cash Reconciliation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/CondensedConsolidatedStatementsofCashFlowsunauditedCashReconciliation</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows (unaudited) - Cash Reconciliation</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>1408403 - Statement - Condensed Consolidated Statement of Shareowners' Equity (unaudited) Parentheticals</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/CondensedConsolidatedStatementofShareownersEquityunauditedParentheticals</Role>
      <ShortName>Condensed Consolidated Statement of Shareowners' Equity (unaudited) Parentheticals</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2101101 - Disclosure - Note 1. Basis of Presentation (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.kimball.com/role/Note1BasisofPresentationNotes</Role>
      <ShortName>Note 1. Basis of Presentation (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2103102 - Disclosure - Note 2. Recent Accounting Pronouncements and Supplemental Information (notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationnotes</Role>
      <ShortName>Note 2. Recent Accounting Pronouncements and Supplemental Information (notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2110103 - Disclosure - Note 3. Restructuring (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.kimball.com/role/Note3RestructuringNotes</Role>
      <ShortName>Note 3. Restructuring (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2116104 - Disclosure - Note 4. Revenue (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.kimball.com/role/Note4RevenueNotes</Role>
      <ShortName>Note 4. Revenue (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2121105 - Disclosure - Note 5. Leases (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.kimball.com/role/Note5LeasesNotes</Role>
      <ShortName>Note 5. Leases (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2128106 - Disclosure - Note 6. Earnings Per Share (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.kimball.com/role/Note6EarningsPerShareNotes</Role>
      <ShortName>Note 6. Earnings Per Share (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2132107 - Disclosure - Note 7. Income Taxes (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.kimball.com/role/Note7IncomeTaxesNotes</Role>
      <ShortName>Note 7. Income Taxes (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2136108 - Disclosure - Note 8. Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note8Inventories</Role>
      <ShortName>Note 8. Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2141109 - Disclosure - Note 9. Accumulated Other Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note9AccumulatedOtherComprehensiveIncome</Role>
      <ShortName>Note 9. Accumulated Other Comprehensive Income</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2145110 - Disclosure - Note 10. Commitments and Contingent Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note10CommitmentsandContingentLiabilities</Role>
      <ShortName>Note 10. Commitments and Contingent Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2150111 - Disclosure - Note 11. Fair Value</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note11FairValue</Role>
      <ShortName>Note 11. Fair Value</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2155112 - Disclosure - Note 12. Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note12Investments</Role>
      <ShortName>Note 12. Investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2163113 - Disclosure - Note 13. Derivative Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note13DerivativeInstruments</Role>
      <ShortName>Note 13. Derivative Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2167114 - Disclosure - Note 14. Postemployment Benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note14PostemploymentBenefits</Role>
      <ShortName>Note 14. Postemployment Benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2170115 - Disclosure - Note 15. Stock Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note15StockCompensation</Role>
      <ShortName>Note 15. Stock Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2175116 - Disclosure - Note 16. Variable Interest Entities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note16VariableInterestEntities</Role>
      <ShortName>Note 16. Variable Interest Entities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2178117 - Disclosure - Note 17.0Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note170SubsequentEvents</Role>
      <ShortName>Note 17.0Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2202201 - Disclosure - Note 1. Basis of Presentation (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note1BasisofPresentationPolicies</Role>
      <ShortName>Note 1. Basis of Presentation (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationnotes</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2204202 - Disclosure - Note 2. Recent Accounting Pronouncements and Supplemental Information (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationPolicies</Role>
      <ShortName>Note 2. Recent Accounting Pronouncements and Supplemental Information (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationnotes</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2211203 - Disclosure - Note 3. Restructuring (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note3RestructuringPolicies</Role>
      <ShortName>Note 3. Restructuring (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationnotes</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2222205 - Disclosure - Note 5. Leases (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note5LeasesPolicies</Role>
      <ShortName>Note 5. Leases (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationnotes</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2233206 - Disclosure - Note 7. Income Taxes (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note7IncomeTaxesPolicies</Role>
      <ShortName>Note 7. Income Taxes (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationnotes</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2237207 - Disclosure - Note 8. Inventories (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note8InventoriesPolicies</Role>
      <ShortName>Note 8. Inventories (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationnotes</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2246208 - Disclosure - Note 10. Commitments and Contingent Liabilities (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note10CommitmentsandContingentLiabilitiesPolicies</Role>
      <ShortName>Note 10. Commitments and Contingent Liabilities (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationnotes</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2251209 - Disclosure - Note 11. Fair Value (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note11FairValuePolicies</Role>
      <ShortName>Note 11. Fair Value (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationnotes</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2256210 - Disclosure - Note 12. Investments (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note12InvestmentsPolicies</Role>
      <ShortName>Note 12. Investments (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationnotes</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2271212 - Disclosure - Note 15. Stock Compensation (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note15StockCompensationPolicies</Role>
      <ShortName>Note 15. Stock Compensation (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationnotes</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2305301 - Disclosure - Note 2. Recent Accounting Pronouncements and Supplemental Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationTables</Role>
      <ShortName>Note 2. Recent Accounting Pronouncements and Supplemental Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationnotes</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2312302 - Disclosure - Note 3. Restructuring (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note3RestructuringTables</Role>
      <ShortName>Note 3. Restructuring (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note3RestructuringNotes</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2318303 - Disclosure - Note 4. Revenue (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note4RevenueTables</Role>
      <ShortName>Note 4. Revenue (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note4RevenueNotes</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2323304 - Disclosure - Note 5. Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note5LeasesTables</Role>
      <ShortName>Note 5. Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note5LeasesNotes</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2329305 - Disclosure - Note 6. Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note6EarningsPerShareTables</Role>
      <ShortName>Note 6. Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note6EarningsPerShareNotes</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2338307 - Disclosure - Note 8. Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note8InventoriesTables</Role>
      <ShortName>Note 8. Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note8Inventories</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2342308 - Disclosure - Note 9. Accumulated Other Comprehensive Income (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note9AccumulatedOtherComprehensiveIncomeTables</Role>
      <ShortName>Note 9. Accumulated Other Comprehensive Income (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note9AccumulatedOtherComprehensiveIncome</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2347309 - Disclosure - Note 10. Commitments and Contingent Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note10CommitmentsandContingentLiabilitiesTables</Role>
      <ShortName>Note 10. Commitments and Contingent Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note10CommitmentsandContingentLiabilities</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2352310 - Disclosure - Note 11. Fair Value (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note11FairValueTables</Role>
      <ShortName>Note 11. Fair Value (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note11FairValue</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2357311 - Disclosure - Note 12. Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note12InvestmentsTables</Role>
      <ShortName>Note 12. Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note12Investments</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2368313 - Disclosure - Note 14. Postemployment Benefits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note14PostemploymentBenefitsTables</Role>
      <ShortName>Note 14. Postemployment Benefits (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note14PostemploymentBenefits</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2372314 - Disclosure - Note 15. Stock Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note15StockCompensationTables</Role>
      <ShortName>Note 15. Stock Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note15StockCompensation</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2406404 - Disclosure - Note 2. Recent Accounting Pronouncements and Supplemental Information - Goodwill and Other Intangible Assets Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationGoodwillandOtherIntangibleAssetsTextualsDetails</Role>
      <ShortName>Note 2. Recent Accounting Pronouncements and Supplemental Information - Goodwill and Other Intangible Assets Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2407405 - Disclosure - Note 2. Recent Accounting Pronouncements and Supplemental Information - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationTextualsDetails</Role>
      <ShortName>Note 2. Recent Accounting Pronouncements and Supplemental Information - Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2408406 - Disclosure - Note 2. Recent Accounting Pronouncements and Supplemental Information - Schedule of Finite-Lived Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationScheduleofFiniteLivedIntangibleAssetsDetails</Role>
      <ShortName>Note 2. Recent Accounting Pronouncements and Supplemental Information - Schedule of Finite-Lived Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2409407 - Disclosure - Note 2. Recent Accounting Pronouncements and Supplemental Information - Components of Non-operating income (expense), net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note2RecentAccountingPronouncementsandSupplementalInformationComponentsofNonoperatingincomeexpensenetDetails</Role>
      <ShortName>Note 2. Recent Accounting Pronouncements and Supplemental Information - Components of Non-operating income (expense), net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2413408 - Disclosure - Note 3. Restructuring - Restructuring Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note3RestructuringRestructuringTextualsDetails</Role>
      <ShortName>Note 3. Restructuring - Restructuring Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2414409 - Disclosure - Note 3. Restructuring - Charges related to Transformation Restructuring Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note3RestructuringChargesrelatedtoTransformationRestructuringPlanDetails</Role>
      <ShortName>Note 3. Restructuring - Charges related to Transformation Restructuring Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2415410 - Disclosure - Note 3. Restructuring - Current Period activity in accrued restructuring related to Transformation Restructuring Reserve (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note3RestructuringCurrentPeriodactivityinaccruedrestructuringrelatedtoTransformationRestructuringReserveDetails</Role>
      <ShortName>Note 3. Restructuring - Current Period activity in accrued restructuring related to Transformation Restructuring Reserve (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2419411 - Disclosure - Note 4. Revenue - Disaggregation of Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note4RevenueDisaggregationofRevenueDetails</Role>
      <ShortName>Note 4. Revenue - Disaggregation of Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2420412 - Disclosure - Note 4. Revenue - Revenue Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note4RevenueRevenueTextualsDetails</Role>
      <ShortName>Note 4. Revenue - Revenue Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2424413 - Disclosure - Note 5. Leases - Components of Lease Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note5LeasesComponentsofLeaseExpenseDetails</Role>
      <ShortName>Note 5. Leases - Components of Lease Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2425414 - Disclosure - Note 5. Leases - Supplemental Cash Flow relating to Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note5LeasesSupplementalCashFlowrelatingtoLeasesDetails</Role>
      <ShortName>Note 5. Leases - Supplemental Cash Flow relating to Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2426415 - Disclosure - Note 5. Leases - Summary of future lease payments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note5LeasesSummaryoffutureleasepaymentsDetails</Role>
      <ShortName>Note 5. Leases - Summary of future lease payments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2427416 - Disclosure - Note 5. Leases - Leases Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note5LeasesLeasesTextualsDetails</Role>
      <ShortName>Note 5. Leases - Leases Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2431418 - Disclosure - Note 6. Earnings Per Share Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note6EarningsPerShareEarningsPerShareDetails</Role>
      <ShortName>Note 6. Earnings Per Share Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2435419 - Disclosure - Note 7. Income Taxes - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note7IncomeTaxesTextualsDetails</Role>
      <ShortName>Note 7. Income Taxes - Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2439420 - Disclosure - Note 8. Inventories - Inventory Components (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note8InventoriesInventoryComponentsDetails</Role>
      <ShortName>Note 8. Inventories - Inventory Components (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2443422 - Disclosure - Note 9. Accumulated Other Comprehensive Income - Accumulated Other Comprehensive Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note9AccumulatedOtherComprehensiveIncomeAccumulatedOtherComprehensiveIncomeDetails</Role>
      <ShortName>Note 9. Accumulated Other Comprehensive Income - Accumulated Other Comprehensive Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2444423 - Disclosure - Note 9. Accumulated Other Comprehensive Income - Reclassifications from Accumulated Other Comprehensive Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note9AccumulatedOtherComprehensiveIncomeReclassificationsfromAccumulatedOtherComprehensiveIncomeDetails</Role>
      <ShortName>Note 9. Accumulated Other Comprehensive Income - Reclassifications from Accumulated Other Comprehensive Income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2448424 - Disclosure - Note 10. Commitments and Contingent Liabilities - Commitments and Contingent Liabilities Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note10CommitmentsandContingentLiabilitiesCommitmentsandContingentLiabilitiesTextualsDetails</Role>
      <ShortName>Note 10. Commitments and Contingent Liabilities - Commitments and Contingent Liabilities Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2449425 - Disclosure - Note 10. Commitments and Contingent Liabilities - Product Warranty (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note10CommitmentsandContingentLiabilitiesProductWarrantyDetails</Role>
      <ShortName>Note 10. Commitments and Contingent Liabilities - Product Warranty (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2453426 - Disclosure - Note 11. Fair Value - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note11FairValueTextualsDetails</Role>
      <ShortName>Note 11. Fair Value - Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2454427 - Disclosure - Note 11. Fair Value - Recurring Fair Value Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note11FairValueRecurringFairValueMeasurementsDetails</Role>
      <ShortName>Note 11. Fair Value - Recurring Fair Value Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2458428 - Disclosure - Note 12. Investments - Schedule of Contractual Maturities on Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note12InvestmentsScheduleofContractualMaturitiesonInvestmentsDetails</Role>
      <ShortName>Note 12. Investments - Schedule of Contractual Maturities on Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2459429 - Disclosure - Note 12. Investments - Unrealized Gain (Loss) on Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note12InvestmentsUnrealizedGainLossonInvestmentsDetails</Role>
      <ShortName>Note 12. Investments - Unrealized Gain (Loss) on Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2460430 - Disclosure - Note 12. Investments - Supplemental Employee Retirement Investments Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note12InvestmentsSupplementalEmployeeRetirementInvestmentsTextualsDetails</Role>
      <ShortName>Note 12. Investments - Supplemental Employee Retirement Investments Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2461431 - Disclosure - Note 12. Investments - Supplemental Employee Retirement Plan Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note12InvestmentsSupplementalEmployeeRetirementPlanInvestmentsDetails</Role>
      <ShortName>Note 12. Investments - Supplemental Employee Retirement Plan Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2462432 - Disclosure - Note 12. Investments - Investments - Equity securities without readily determinable fair value Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note12InvestmentsInvestmentsEquitysecuritieswithoutreadilydeterminablefairvalueTextualsDetails</Role>
      <ShortName>Note 12. Investments - Investments - Equity securities without readily determinable fair value Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2466433 - Disclosure - Note 13. Derivative Instruments - Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note13DerivativeInstrumentsTextualsDetails</Role>
      <ShortName>Note 13. Derivative Instruments - Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2469434 - Disclosure - Note 14. Postemployment Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note14PostemploymentBenefitsDetails</Role>
      <ShortName>Note 14. Postemployment Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.kimball.com/role/Note14PostemploymentBenefitsTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2473435 - Disclosure - Note 15. Stock Compensation - Stock Compensation Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note15StockCompensationStockCompensationTextualsDetails</Role>
      <ShortName>Note 15. Stock Compensation - Stock Compensation Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2474436 - Disclosure - Note 15. Stock Compensation - Stock Compensation Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note15StockCompensationStockCompensationAwardsDetails</Role>
      <ShortName>Note 15. Stock Compensation - Stock Compensation Awards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2477437 - Disclosure - Note 16. Variable Interest Entities -Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note16VariableInterestEntitiesTextualsDetails</Role>
      <ShortName>Note 16. Variable Interest Entities -Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="kbal-20200930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2481439 - Disclosure - Note 17. Subsequent Events Textuals (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.kimball.com/role/Note17SubsequentEventsTextualsDetails</Role>
      <ShortName>Note 17. Subsequent Events Textuals (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</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="kbal-20200930.htm">kbal-20200930.htm</File>
    <File>exhibit31109302020q1.htm</File>
    <File>exhibit31209302020q1.htm</File>
    <File>exhibit32109302020q1.htm</File>
    <File>exhibit32209302020q1.htm</File>
    <File>kbal-20200930.xsd</File>
    <File>kbal-20200930_cal.xml</File>
    <File>kbal-20200930_def.xml</File>
    <File>kbal-20200930_lab.xml</File>
    <File>kbal-20200930_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>kbal-20200930_g1.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2020-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
