<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>215</ContextCount>
  <ElementCount>233</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>47</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>9952151 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSS</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>9952152 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSSParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>9952153 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/CONSOLIDATEDBALANCESHEETS</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>9952154 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/CONSOLIDATEDBALANCESHEETSParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>9952155 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>9952156 - Statement - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/CONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITY</Role>
      <ShortName>CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>9952157 - Statement - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/CONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITYParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>9952158 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>9952159 - Disclosure - REVENUE RECOGNITION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/REVENUERECOGNITION</Role>
      <ShortName>REVENUE RECOGNITION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>9952160 - Disclosure - EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/EARNINGSPERSHAREANDSTOCKHOLDERSEQUITY</Role>
      <ShortName>EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>9952161 - Disclosure - RECEIVABLES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/RECEIVABLES</Role>
      <ShortName>RECEIVABLES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>9952162 - Disclosure - GOODWILL AND INTANGIBLE ASSETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/GOODWILLANDINTANGIBLEASSETS</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>9952163 - Disclosure - LONG-TERM DEBT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/LONGTERMDEBT</Role>
      <ShortName>LONG-TERM DEBT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>9952164 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/INCOMETAXES</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>9952165 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/COMMITMENTSANDCONTINGENCIES</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>9952166 - Disclosure - LITIGATION AND OTHER RELATED CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/LITIGATIONANDOTHERRELATEDCONTINGENCIES</Role>
      <ShortName>LITIGATION AND OTHER RELATED CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>9952167 - Disclosure - Commitment and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/CommitmentandContingencies</Role>
      <ShortName>Commitment and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>9952168 - Disclosure - Segment Reporting</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/SegmentReporting</Role>
      <ShortName>Segment Reporting</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>9955511 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policy)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicy</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policy)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>9955512 - Disclosure - REVENUE RECOGNITION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/REVENUERECOGNITIONTables</Role>
      <ShortName>REVENUE RECOGNITION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/REVENUERECOGNITION</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>9955513 - Disclosure - EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/EARNINGSPERSHAREANDSTOCKHOLDERSEQUITYTables</Role>
      <ShortName>EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/EARNINGSPERSHAREANDSTOCKHOLDERSEQUITY</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>9955514 - Disclosure - RECEIVABLES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/RECEIVABLESTables</Role>
      <ShortName>RECEIVABLES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/RECEIVABLES</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>9955515 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/GOODWILLANDINTANGIBLEASSETSTables</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/GOODWILLANDINTANGIBLEASSETS</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>9955516 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/LONGTERMDEBTLONGTERMDEBTTables</Role>
      <ShortName>LONG-TERM DEBT LONG-TERM DEBT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>9955517 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>9955519 - Disclosure - Segment Reporting (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/SegmentReportingTables</Role>
      <ShortName>Segment Reporting (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/SegmentReporting</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>9955520 - Disclosure - REVENUE RECOGNITION (Disaggregation of Revenue by Major Service Line) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/REVENUERECOGNITIONDisaggregationofRevenuebyMajorServiceLineDetails</Role>
      <ShortName>REVENUE RECOGNITION (Disaggregation of Revenue by Major Service Line) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/REVENUERECOGNITIONTables</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>9955521 - Disclosure - REVENUE RECOGNITION (Deferred Revenue) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/REVENUERECOGNITIONDeferredRevenueDetails</Role>
      <ShortName>REVENUE RECOGNITION (Deferred Revenue) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/REVENUERECOGNITIONTables</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>9955522 - Disclosure - REVENUE RECOGNITION (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/REVENUERECOGNITIONNarrativeDetails</Role>
      <ShortName>REVENUE RECOGNITION (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/REVENUERECOGNITIONTables</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>9955523 - Disclosure - REVENUE RECOGNITION (Remaining Performance Obligation) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/REVENUERECOGNITIONRemainingPerformanceObligationDetails</Role>
      <ShortName>REVENUE RECOGNITION (Remaining Performance Obligation) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/REVENUERECOGNITIONTables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>9955524 - Disclosure - EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/EARNINGSPERSHAREANDSTOCKHOLDERSEQUITYNarrativeDetails</Role>
      <ShortName>EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/EARNINGSPERSHAREANDSTOCKHOLDERSEQUITYTables</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>9955525 - Disclosure - EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY (Computations of Basic and Diluted Earnings Per Share) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/EARNINGSPERSHAREANDSTOCKHOLDERSEQUITYComputationsofBasicandDilutedEarningsPerShareDetails</Role>
      <ShortName>EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY (Computations of Basic and Diluted Earnings Per Share) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/EARNINGSPERSHAREANDSTOCKHOLDERSEQUITYTables</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9955526 - Disclosure - RECEIVABLES (Schedule of Short-Term Receivables) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/RECEIVABLESScheduleofShortTermReceivablesDetails</Role>
      <ShortName>RECEIVABLES (Schedule of Short-Term Receivables) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/RECEIVABLESTables</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9955527 - Disclosure - RECEIVABLES (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/RECEIVABLESNarrativeDetails</Role>
      <ShortName>RECEIVABLES (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/RECEIVABLESTables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9955528 - Disclosure - RECEIVABLES (Schedule of Receivables Based on Year of Origination) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/RECEIVABLESScheduleofReceivablesBasedonYearofOriginationDetails</Role>
      <ShortName>RECEIVABLES (Schedule of Receivables Based on Year of Origination) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/RECEIVABLESTables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9955529 - Disclosure - RECEIVABLES (Schedule of Activity in the Allowance For Doubtful Accounts) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/RECEIVABLESScheduleofActivityintheAllowanceForDoubtfulAccountsDetails</Role>
      <ShortName>RECEIVABLES (Schedule of Activity in the Allowance For Doubtful Accounts) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/RECEIVABLESTables</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9955530 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Schedule of Goodwill) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/GOODWILLANDINTANGIBLEASSETSScheduleofGoodwillDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS (Schedule of Goodwill) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/GOODWILLANDINTANGIBLEASSETSTables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9955531 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Schedule of Intangible Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/GOODWILLANDINTANGIBLEASSETSScheduleofIntangibleAssetsDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS (Schedule of Intangible Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/GOODWILLANDINTANGIBLEASSETSTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9955532 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Intangible Assets Acquired) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/GOODWILLANDINTANGIBLEASSETSIntangibleAssetsAcquiredDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS (Intangible Assets Acquired) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/GOODWILLANDINTANGIBLEASSETSTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9955533 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/GOODWILLANDINTANGIBLEASSETSNarrativeDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLE ASSETS (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/GOODWILLANDINTANGIBLEASSETSTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9955534 - Disclosure - LONG-TERM DEBT (Components of Long-Term Debt) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/LONGTERMDEBTComponentsofLongTermDebtDetails</Role>
      <ShortName>LONG-TERM DEBT (Components of Long-Term Debt) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/LONGTERMDEBTLONGTERMDEBTTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9955535 - Disclosure - LONG-TERM DEBT (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/LONGTERMDEBTNarrativeDetails</Role>
      <ShortName>LONG-TERM DEBT (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/LONGTERMDEBTLONGTERMDEBTTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9955536 - Disclosure - INCOME TAXES (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/INCOMETAXESNarrativeDetails</Role>
      <ShortName>INCOME TAXES (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/INCOMETAXES</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9955537 - Disclosure - LITIGATION AND OTHER RELATED CONTINGENCIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/LITIGATIONANDOTHERRELATEDCONTINGENCIESDetails</Role>
      <ShortName>LITIGATION AND OTHER RELATED CONTINGENCIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/LITIGATIONANDOTHERRELATEDCONTINGENCIES</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9955538 - Disclosure - Commitment and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/CommitmentandContingenciesDetails</Role>
      <ShortName>Commitment and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/CommitmentandContingencies</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="hrb-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9955539 - Disclosure - Segment Reporting (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/SegmentReportingDetails</Role>
      <ShortName>Segment Reporting (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/SegmentReportingTables</ParentRole>
      <Position>48</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" isDefinitelyFs="true" isUsgaap="true" original="hrb-20260331.htm">hrb-20260331.htm</File>
    <File>hrb-20260331.xsd</File>
    <File>hrb-20260331_cal.xml</File>
    <File>hrb-20260331_def.xml</File>
    <File>hrb-20260331_lab.xml</File>
    <File>hrb-20260331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="821">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="30">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="2">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
