<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.21.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>246</ContextCount>
  <ElementCount>451</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>80</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001001 - 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-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001002 - Statement - Consolidated Statements Of Operations And Comprehensive Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncomeLoss</Role>
      <ShortName>Consolidated Statements Of Operations And Comprehensive Income (Loss)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1002003 - Statement - Consolidated Statements Of Income And Comprehensive Income (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/ConsolidatedStatementsOfIncomeAndComprehensiveIncomeParenthetical</Role>
      <ShortName>Consolidated Statements Of Income And Comprehensive Income (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1003004 - 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-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1004005 - 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-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1005006 - 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-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1006007 - Statement - Consolidated Statements Of Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/ConsolidatedStatementsOfStockholdersEquity</Role>
      <ShortName>Consolidated Statements Of Stockholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1007008 - Statement - Consolidated Statements Of Stockholders' Equity (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/ConsolidatedStatementsOfStockholdersEquityParenthetical</Role>
      <ShortName>Consolidated Statements Of Stockholders' Equity (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2101101 - 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-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2104102 - 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-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2110103 - Disclosure - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/EarningsPerShare</Role>
      <ShortName>Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2113104 - 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-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2119105 - Disclosure - Property And Equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/PropertyAndEquipment</Role>
      <ShortName>Property And Equipment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2123106 - 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>14</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2129107 - 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>15</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2133108 - Disclosure - Stock-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/StockBasedCompensation</Role>
      <ShortName>Stock-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2138109 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2147110 - 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>18</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2149111 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2154112 - 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>20</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2156113 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2202201 - 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>
      <ParentRole>http://www.hrblock.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2305301 - 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>23</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2311302 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/EarningsPerShareTables</Role>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/EarningsPerShare</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2314303 - 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>25</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2320304 - Disclosure - Property And Equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/PropertyAndEquipmentTables</Role>
      <ShortName>Property And Equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/PropertyAndEquipment</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2324305 - 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>27</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2330306 - Disclosure - Long-Term Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/LongTermDebtTables</Role>
      <ShortName>Long-Term Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/LongTermDebt</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2334307 - Disclosure - Stock-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/StockBasedCompensationTables</Role>
      <ShortName>Stock-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/StockBasedCompensation</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2339308 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/IncomeTaxes</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2350309 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/Leases</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2403401 - Disclosure - Summary Of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/SummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary Of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/SummaryOfSignificantAccountingPoliciesPolicy</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2406402 - Disclosure - Revenue Recognition (Disaggregation of Revenue) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/RevenueRecognitionDisaggregationofRevenueDetails</Role>
      <ShortName>Revenue Recognition (Disaggregation of Revenue) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/RevenueRecognitionTables</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2407403 - Disclosure - Revenue Recognition (Changes in Balances of Deferred Revenue and Wages) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/RevenueRecognitionChangesinBalancesofDeferredRevenueandWagesDetails</Role>
      <ShortName>Revenue Recognition (Changes in Balances of Deferred Revenue and Wages) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/RevenueRecognitionTables</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2408404 - 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>35</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2409405 - Disclosure - Revenue Recognition (Additional Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/RevenueRecognitionAdditionalInformationDetails</Role>
      <ShortName>Revenue Recognition (Additional Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/RevenueRecognitionTables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2412406 - Disclosure - Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/EarningsPerShareDetails</Role>
      <ShortName>Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/EarningsPerShareTables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2415407 - 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>38</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2416408 - 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>39</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2417409 - 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>40</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2418410 - 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>41</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2421411 - Disclosure - Property And Equipment (Components Of Property And Equipment) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/PropertyAndEquipmentComponentsOfPropertyAndEquipmentDetails</Role>
      <ShortName>Property And Equipment (Components Of Property And Equipment) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/PropertyAndEquipmentTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2422412 - Disclosure - Property And Equipment (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/PropertyAndEquipmentNarrativeDetails</Role>
      <ShortName>Property And Equipment (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/PropertyAndEquipmentTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2425413 - 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>44</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2426414 - 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>45</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2427415 - 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>46</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2428416 - Disclosure - Goodwill And Intangible Assets (Intangible Assets Acquired and Liabilities Assumed) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/GoodwillAndIntangibleAssetsIntangibleAssetsAcquiredandLiabilitiesAssumedDetails</Role>
      <ShortName>Goodwill And Intangible Assets (Intangible Assets Acquired and Liabilities Assumed) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/GoodwillAndIntangibleAssetsTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2431417 - 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/LongTermDebtTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2432418 - 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/LongTermDebtTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2435419 - Disclosure - Stock-Based Compensation (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/StockBasedCompensationNarrativeDetails</Role>
      <ShortName>Stock-Based Compensation (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/StockBasedCompensationTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2436420 - Disclosure - Stock-Based Compensation (Summary Of Nonvested Shares) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/StockBasedCompensationSummaryOfNonvestedSharesDetails</Role>
      <ShortName>Stock-Based Compensation (Summary Of Nonvested Shares) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/StockBasedCompensationTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2437421 - Disclosure - Stock-Based Compensation (Assumptions Used To Value Options) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/StockBasedCompensationAssumptionsUsedToValueOptionsDetails</Role>
      <ShortName>Stock-Based Compensation (Assumptions Used To Value Options) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/StockBasedCompensationTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2440422 - 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/IncomeTaxesTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2441423 - Disclosure - Income Taxes (Schedule Of Components Of Income From Continuing Operations) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/IncomeTaxesScheduleOfComponentsOfIncomeFromContinuingOperationsDetails</Role>
      <ShortName>Income Taxes (Schedule Of Components Of Income From Continuing Operations) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/IncomeTaxesTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2442424 - Disclosure - Income Taxes (Schedule Of Reconciliation Between Income Tax Provision And Statutory Federal Tax Rate) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/IncomeTaxesScheduleOfReconciliationBetweenIncomeTaxProvisionAndStatutoryFederalTaxRateDetails</Role>
      <ShortName>Income Taxes (Schedule Of Reconciliation Between Income Tax Provision And Statutory Federal Tax Rate) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/IncomeTaxesTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2443425 - Disclosure - Income Taxes (Schedule Of Components Of Income Tax Expense (Benefit) For Continuing Operations) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/IncomeTaxesScheduleOfComponentsOfIncomeTaxExpenseBenefitForContinuingOperationsDetails</Role>
      <ShortName>Income Taxes (Schedule Of Components Of Income Tax Expense (Benefit) For Continuing Operations) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/IncomeTaxesTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2444426 - Disclosure - Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/IncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetails</Role>
      <ShortName>Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/IncomeTaxesTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2445427 - Disclosure - Income Taxes (Schedule of Valuation Allowance) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/IncomeTaxesScheduleofValuationAllowanceDetails</Role>
      <ShortName>Income Taxes (Schedule of Valuation Allowance) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/IncomeTaxesTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2446428 - Disclosure - Income Taxes (Schedule Of Reconciliation Of Unrecognized Tax Benefits) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/IncomeTaxesScheduleOfReconciliationOfUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>Income Taxes (Schedule Of Reconciliation Of Unrecognized Tax Benefits) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/IncomeTaxesTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2448429 - Disclosure - Commitments And Contingencies (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/CommitmentsAndContingenciesNarrativeDetails</Role>
      <ShortName>Commitments And Contingencies (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2451430 - Disclosure - Leases (Lease Costs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/LeasesLeaseCostsDetails</Role>
      <ShortName>Leases (Lease Costs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/LeasesTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2452431 - Disclosure - Leases (Other Information Related to Operating Leases) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/LeasesOtherInformationRelatedtoOperatingLeasesDetails</Role>
      <ShortName>Leases (Other Information Related to Operating Leases) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/LeasesTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2453432 - Disclosure - Leases (Aggregate Operating Lease Maturities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/LeasesAggregateOperatingLeaseMaturitiesDetails</Role>
      <ShortName>Leases (Aggregate Operating Lease Maturities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/LeasesTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2455433 - 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>64</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2457434 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.hrblock.com/role/SubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.hrblock.com/role/SubsequentEvents</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="hrb-20210430.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9999.htm</HtmlFileName>
      <LongName>Uncategorized Items - hrb-20210430.htm</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/role/uncategorizedFacts</Role>
      <ShortName>Uncategorized Items - hrb-20210430.htm</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-K" original="hrb-20210430.htm">hrb-20210430.htm</File>
    <File>hrb-20210430.xsd</File>
    <File>hrb-20210430_cal.xml</File>
    <File>hrb-20210430_def.xml</File>
    <File>hrb-20210430_lab.xml</File>
    <File>hrb-20210430_pre.xml</File>
    <File>hrb20210430exhibit1017.htm</File>
    <File>hrb20210430exhibit21.htm</File>
    <File>hrb20210430exhibit22.htm</File>
    <File>hrb20210430exhibit23.htm</File>
    <File>hrb20210430exhibit311.htm</File>
    <File>hrb20210430exhibit312.htm</File>
    <File>hrb20210430exhibit321.htm</File>
    <File>hrb20210430exhibit322.htm</File>
    <File>hrb20210430exhibit412.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>hrb-20210430_g1.jpg</File>
    <File>hrb-20210430_g10.jpg</File>
    <File>hrb-20210430_g2.jpg</File>
    <File>hrb-20210430_g3.jpg</File>
    <File>hrb-20210430_g4.jpg</File>
    <File>hrb-20210430_g5.jpg</File>
    <File>hrb-20210430_g6.jpg</File>
    <File>hrb-20210430_g7.jpg</File>
    <File>hrb-20210430_g8.jpg</File>
    <File>hrb-20210430_g9.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/srt/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2019-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
