<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>328</ContextCount>
  <ElementCount>503</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>114</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>10</UnitCount>
  <MyReports>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Document - Audit Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/AuditInformation</Role>
      <ShortName>Audit Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>9952151 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CONSOLIDATEDBALANCESHEETS</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>9952152 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CONSOLIDATEDBALANCESHEETSParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>9952153 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>9952154 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>9952155 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>9952156 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>9952157 - Statement - CONSOLIDATED STATEMENTS OF EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CONSOLIDATEDSTATEMENTSOFEQUITY</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>9952158 - Statement - CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CONSOLIDATEDSTATEMENTSOFEQUITYParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>9952159 - Disclosure - Schedule II Valuation and Qualifying Accounts</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/ScheduleIIValuationandQualifyingAccounts</Role>
      <ShortName>Schedule II Valuation and Qualifying Accounts</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>9952160 - Disclosure - Description of Business and Basis of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/DescriptionofBusinessandBasisofPresentation</Role>
      <ShortName>Description of Business and Basis of Presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>9952161 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SummaryofSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>9952162 - Disclosure - Revenue Recognition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/RevenueRecognition</Role>
      <ShortName>Revenue Recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>9952163 - Disclosure - Computation of (Loss) Earnings per Common Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/ComputationofLossEarningsperCommonShare</Role>
      <ShortName>Computation of (Loss) Earnings per Common Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>9952164 - Disclosure - Team Personnel Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/TeamPersonnelTransactions</Role>
      <ShortName>Team Personnel Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>9952165 - Disclosure - Cash, Cash Equivalent and Restricted Cash</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CashCashEquivalentandRestrictedCash</Role>
      <ShortName>Cash, Cash Equivalent and Restricted Cash</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>9952166 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>9952167 - Disclosure - Property and Equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/PropertyandEquipment</Role>
      <ShortName>Property and Equipment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>9952168 - Disclosure - Goodwill and Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/GoodwillandIntangibleAssets</Role>
      <ShortName>Goodwill and Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>9952169 - Disclosure - Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/Investments</Role>
      <ShortName>Investments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>9952170 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>9952171 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CommitmentsandContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>9952172 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>9952173 - Disclosure - Benefit Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlans</Role>
      <ShortName>Benefit Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>9952174 - Disclosure - Share-based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SharebasedCompensation</Role>
      <ShortName>Share-based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>9952175 - Disclosure - Stock Repurchase Program</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/StockRepurchaseProgram</Role>
      <ShortName>Stock Repurchase Program</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>9952176 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/RelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>9952177 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>9952178 - Disclosure - Additional Financial Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/AdditionalFinancialInformation</Role>
      <ShortName>Additional Financial Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>9952179 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.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>32</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>995447 - Disclosure - Insider Trading Policies and Procedures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc</Role>
      <ShortName>Insider Trading Policies and Procedures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure</Role>
      <ShortName>Cybersecurity Risk Management and Strategy Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9955511 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SummaryofSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9955512 - Disclosure - Revenue Recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/RevenueRecognitionTables</Role>
      <ShortName>Revenue Recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/RevenueRecognition</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9955513 - Disclosure - Computation of (Loss) Earnings per Common Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/ComputationofLossEarningsperCommonShareTables</Role>
      <ShortName>Computation of (Loss) Earnings per Common Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/ComputationofLossEarningsperCommonShare</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9955514 - Disclosure - Cash, Cash Equivalent and Restricted Cash (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CashCashEquivalentandRestrictedCashTables</Role>
      <ShortName>Cash, Cash Equivalent and Restricted Cash (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/CashCashEquivalentandRestrictedCash</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9955515 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/Leases</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9955516 - Disclosure - Property and Equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/PropertyandEquipmentTables</Role>
      <ShortName>Property and Equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/PropertyandEquipment</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9955517 - Disclosure - Goodwill and Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/GoodwillandIntangibleAssetsTables</Role>
      <ShortName>Goodwill and Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/GoodwillandIntangibleAssets</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9955518 - Disclosure - Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/InvestmentsTables</Role>
      <ShortName>Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/Investments</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9955519 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/FairValueMeasurements</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9955520 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CommitmentsandContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/CommitmentsandContingencies</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9955521 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/DebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/Debt</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9955522 - Disclosure - Benefit Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlansTables</Role>
      <ShortName>Benefit Plans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlans</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9955523 - Disclosure - Share-based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SharebasedCompensationTables</Role>
      <ShortName>Share-based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SharebasedCompensation</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9955524 - Disclosure - Related Party Transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/RelatedPartyTransactionsTables</Role>
      <ShortName>Related Party Transactions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/RelatedPartyTransactions</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9955525 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/IncomeTaxes</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9955526 - Disclosure - Additional Financial Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/AdditionalFinancialInformationTables</Role>
      <ShortName>Additional Financial Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/AdditionalFinancialInformation</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9955527 - Disclosure - Segment Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SegmentInformationTables</Role>
      <ShortName>Segment Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SegmentInformation</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9955528 - Disclosure - Schedule II Valuation and Qualifying Accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/ScheduleIIValuationandQualifyingAccountsDetails</Role>
      <ShortName>Schedule II Valuation and Qualifying Accounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/ScheduleIIValuationandQualifyingAccounts</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9955529 - Disclosure - Description of Business and Basis of Presentation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/DescriptionofBusinessandBasisofPresentationDetails</Role>
      <ShortName>Description of Business and Basis of Presentation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/DescriptionofBusinessandBasisofPresentation</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9955530 - Disclosure - Summary of Significant Accounting Policies (Direct Operating Expenses-League) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SummaryofSignificantAccountingPoliciesDirectOperatingExpensesLeagueNarrativeDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Direct Operating Expenses-League) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SummaryofSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9955531 - Disclosure - Summary of Significant Accounting Policies (Advertising Costs, Policy) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SummaryofSignificantAccountingPoliciesAdvertisingCostsPolicyNarrativeDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Advertising Costs, Policy) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SummaryofSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9955532 - Disclosure - Summary of Significant Accounting Policies (Accounts Receivable) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SummaryofSignificantAccountingPoliciesAccountsReceivableNarrativeDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Accounts Receivable) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SummaryofSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9955533 - Disclosure - Summary of Significant Accounting Policies (Long-Lived and Indefinite-Lived Assets) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SummaryofSignificantAccountingPoliciesLongLivedandIndefiniteLivedAssetsNarrativeDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Long-Lived and Indefinite-Lived Assets) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SummaryofSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9955534 - Disclosure - Revenue Recognition (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/RevenueRecognitionNarrativeDetails</Role>
      <ShortName>Revenue Recognition (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/RevenueRecognitionTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9955535 - Disclosure - Revenue Recognition (Disaggregation of Revenue) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/RevenueRecognitionDisaggregationofRevenueDetails</Role>
      <ShortName>Revenue Recognition (Disaggregation of Revenue) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/RevenueRecognitionTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9955536 - Disclosure - Revenue Recognition (Contract Balances) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/RevenueRecognitionContractBalancesDetails</Role>
      <ShortName>Revenue Recognition (Contract Balances) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/RevenueRecognitionTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9955537 - Disclosure - Revenue Recognition (Remaining Performance Obligation) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/RevenueRecognitionRemainingPerformanceObligationDetails</Role>
      <ShortName>Revenue Recognition (Remaining Performance Obligation) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/RevenueRecognitionTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9955538 - Disclosure - Computation of (Loss) Earnings per Common Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/ComputationofLossEarningsperCommonShareDetails</Role>
      <ShortName>Computation of (Loss) Earnings per Common Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/ComputationofLossEarningsperCommonShareTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9955539 - Disclosure - Team Personnel Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/TeamPersonnelTransactionsDetails</Role>
      <ShortName>Team Personnel Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/TeamPersonnelTransactions</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9955540 - Disclosure - Cash, Cash Equivalent and Restricted Cash (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CashCashEquivalentandRestrictedCashDetails</Role>
      <ShortName>Cash, Cash Equivalent and Restricted Cash (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/CashCashEquivalentandRestrictedCashTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9955541 - Disclosure - Leases (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/LeasesNarrativeDetails</Role>
      <ShortName>Leases (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/LeasesTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9955542 - Disclosure - Leases (Balance Sheet Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/LeasesBalanceSheetInformationDetails</Role>
      <ShortName>Leases (Balance Sheet Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/LeasesTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9955543 - Disclosure - Leases (Income Statement Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/LeasesIncomeStatementInformationDetails</Role>
      <ShortName>Leases (Income Statement Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/LeasesTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9955544 - Disclosure - Leases - (Supplemental Information) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/LeasesSupplementalInformationNarrativeDetails</Role>
      <ShortName>Leases - (Supplemental Information) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9955545 - Disclosure - Leases (Lease Maturities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/LeasesLeaseMaturitiesDetails</Role>
      <ShortName>Leases (Lease Maturities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/LeasesTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9955546 - Disclosure - Property and Equipment (Schedule of Property, Plant and Equipment) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/PropertyandEquipmentScheduleofPropertyPlantandEquipmentDetails</Role>
      <ShortName>Property and Equipment (Schedule of Property, Plant and Equipment) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/PropertyandEquipmentTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9955547 - Disclosure - Property and Equipment (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/PropertyandEquipmentNarrativeDetails</Role>
      <ShortName>Property and Equipment (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/PropertyandEquipmentTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9955548 - Disclosure - Goodwill and Intangible Assets (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/GoodwillandIntangibleAssetsNarrativeDetails</Role>
      <ShortName>Goodwill and Intangible Assets (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/GoodwillandIntangibleAssetsTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9955549 - Disclosure - Goodwill and Intangible Assets (Schedule of Indefinite-Lived Intangible Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/GoodwillandIntangibleAssetsScheduleofIndefiniteLivedIntangibleAssetsDetails</Role>
      <ShortName>Goodwill and Intangible Assets (Schedule of Indefinite-Lived Intangible Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/GoodwillandIntangibleAssetsTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9955550 - Disclosure - Investments (Schedule of Investments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/InvestmentsScheduleofInvestmentsDetails</Role>
      <ShortName>Investments (Schedule of Investments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/InvestmentsTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9955551 - Disclosure - Investments (Schedule of Investments) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/InvestmentsScheduleofInvestmentsNarrativeDetails</Role>
      <ShortName>Investments (Schedule of Investments) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/InvestmentsTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9955552 - Disclosure - Investments (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/InvestmentsNarrativeDetails</Role>
      <ShortName>Investments (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/InvestmentsTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9955553 - Disclosure - Investments (Cost Basis and Carrying Value of Equity Investments with Readily Determinable Fair Values) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/InvestmentsCostBasisandCarryingValueofEquityInvestmentswithReadilyDeterminableFairValuesDetails</Role>
      <ShortName>Investments (Cost Basis and Carrying Value of Equity Investments with Readily Determinable Fair Values) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/InvestmentsTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>9955554 - Disclosure - Investments (Realized and Unrealized Gains on Equity Investments with Readily Determinable Fair Values) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/InvestmentsRealizedandUnrealizedGainsonEquityInvestmentswithReadilyDeterminableFairValuesDetails</Role>
      <ShortName>Investments (Realized and Unrealized Gains on Equity Investments with Readily Determinable Fair Values) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/InvestmentsTables</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>9955555 - Disclosure - Fair Value Measurements (Assets and Liabilities Measured on Recurring Basis) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredonRecurringBasisDetails</Role>
      <ShortName>Fair Value Measurements (Assets and Liabilities Measured on Recurring Basis) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>9955556 - Disclosure - Fair Value Measurements (Valuation Inputs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/FairValueMeasurementsValuationInputsDetails</Role>
      <ShortName>Fair Value Measurements (Valuation Inputs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>9955557 - Disclosure - Fair Value Measurements (Additional Information About Level 3 Inputs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/FairValueMeasurementsAdditionalInformationAboutLevel3InputsDetails</Role>
      <ShortName>Fair Value Measurements (Additional Information About Level 3 Inputs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>81</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>9955558 - Disclosure - Fair Value Measurements - Schedule of Carrying Value and Fair Value of Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/FairValueMeasurementsScheduleofCarryingValueandFairValueofDebtDetails</Role>
      <ShortName>Fair Value Measurements - Schedule of Carrying Value and Fair Value of Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>9955559 - Disclosure - Commitments and Contingencies (Contractual Obligations And Off Balance Sheet Arrangements) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/CommitmentsandContingenciesContractualObligationsAndOffBalanceSheetArrangementsDetails</Role>
      <ShortName>Commitments and Contingencies (Contractual Obligations And Off Balance Sheet Arrangements) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/CommitmentsandContingenciesTables</ParentRole>
      <Position>83</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>9955560 - Disclosure - Debt (Knicks and Rangers Credit Facilities Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/DebtKnicksandRangersCreditFacilitiesNarrativeDetails</Role>
      <ShortName>Debt (Knicks and Rangers Credit Facilities Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/DebtTables</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>9955561 - Disclosure - Debt (Rangers NHL Advance Agreement) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/DebtRangersNHLAdvanceAgreementNarrativeDetails</Role>
      <ShortName>Debt (Rangers NHL Advance Agreement) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/DebtTables</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>9955562 - Disclosure - Debt (Deferred Financing Costs For Revolving Credit Facilities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/DebtDeferredFinancingCostsForRevolvingCreditFacilitiesDetails</Role>
      <ShortName>Debt (Deferred Financing Costs For Revolving Credit Facilities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/DebtTables</ParentRole>
      <Position>86</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>9955563 - Disclosure - Benefit Plans (Schedule of Changes in Benefit Obligation and Plan Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlansScheduleofChangesinBenefitObligationandPlanAssetsDetails</Role>
      <ShortName>Benefit Plans (Schedule of Changes in Benefit Obligation and Plan Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>87</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>9955564 - Disclosure - Benefit Plans (Defined Benefit Pension Plans) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlansDefinedBenefitPensionPlansNarrativeDetails</Role>
      <ShortName>Benefit Plans (Defined Benefit Pension Plans) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>88</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>9955565 - Disclosure - Benefit Plans (Schedule of Amounts Recognized in Balance Sheet) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlansScheduleofAmountsRecognizedinBalanceSheetDetails</Role>
      <ShortName>Benefit Plans (Schedule of Amounts Recognized in Balance Sheet) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>89</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>9955566 - Disclosure - Benefit Plans (Schedule of Net Periodic Benefit Cost Not yet Recognized) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlansScheduleofNetPeriodicBenefitCostNotyetRecognizedDetails</Role>
      <ShortName>Benefit Plans (Schedule of Net Periodic Benefit Cost Not yet Recognized) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>9955567 - Disclosure - Benefit Plans (Schedule of Net Periodic Benefit Cost) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlansScheduleofNetPeriodicBenefitCostDetails</Role>
      <ShortName>Benefit Plans (Schedule of Net Periodic Benefit Cost) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>91</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>9955568 - Disclosure - Benefit Plans (Schedule of Amounts Recognized in Other Comprehensive Income (Loss)) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlansScheduleofAmountsRecognizedinOtherComprehensiveIncomeLossDetails</Role>
      <ShortName>Benefit Plans (Schedule of Amounts Recognized in Other Comprehensive Income (Loss)) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>9955569 - Disclosure - Benefit Plans (Schedule of Assumptions Used) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlansScheduleofAssumptionsUsedDetails</Role>
      <ShortName>Benefit Plans (Schedule of Assumptions Used) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>93</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>9955570 - Disclosure - Benefit Plans (Schedule of Expected Benefit Payments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlansScheduleofExpectedBenefitPaymentsDetails</Role>
      <ShortName>Benefit Plans (Schedule of Expected Benefit Payments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>94</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>9955571 - Disclosure - Benefit Plan (Defined Contribution Plan) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlanDefinedContributionPlanDetails</Role>
      <ShortName>Benefit Plan (Defined Contribution Plan) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>95</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>9955572 - Disclosure - Benefit Plan (Schedule of Multiemployer Defined Benefit Pension Plans) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlanScheduleofMultiemployerDefinedBenefitPensionPlansDetails</Role>
      <ShortName>Benefit Plan (Schedule of Multiemployer Defined Benefit Pension Plans) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>96</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>9955573 - Disclosure - Benefit Plan (Multiemployer Defined Benefit Pension Plans) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlanMultiemployerDefinedBenefitPensionPlansNarrativeDetails</Role>
      <ShortName>Benefit Plan (Multiemployer Defined Benefit Pension Plans) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>97</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>9955574 - Disclosure - Benefit Plans (Executive Deferred Compensation Plan) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlansExecutiveDeferredCompensationPlanNarrativeDetails</Role>
      <ShortName>Benefit Plans (Executive Deferred Compensation Plan) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>98</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>9955575 - Disclosure - Benefit Plans (Executive Deferred Compensation Plan) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/BenefitPlansExecutiveDeferredCompensationPlanDetails</Role>
      <ShortName>Benefit Plans (Executive Deferred Compensation Plan) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/BenefitPlansTables</ParentRole>
      <Position>99</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>9955576 - Disclosure - Share-based Compensation (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SharebasedCompensationNarrativeDetails</Role>
      <ShortName>Share-based Compensation (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SharebasedCompensationTables</ParentRole>
      <Position>100</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>9955577 - Disclosure - Share-based Compensation (Schedule of Share-based Compensation, Restricted Stock Units Award Activities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SharebasedCompensationScheduleofSharebasedCompensationRestrictedStockUnitsAwardActivitiesDetails</Role>
      <ShortName>Share-based Compensation (Schedule of Share-based Compensation, Restricted Stock Units Award Activities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SharebasedCompensationTables</ParentRole>
      <Position>101</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>9955578 - Disclosure - Share-based Compensation (Restricted Stock Units Activity Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SharebasedCompensationRestrictedStockUnitsActivityNarrativeDetails</Role>
      <ShortName>Share-based Compensation (Restricted Stock Units Activity Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SharebasedCompensationTables</ParentRole>
      <Position>102</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>9955579 - Disclosure - Share-based Compensation (Schedule of Share-based Compensation Activities, Stock Option) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SharebasedCompensationScheduleofSharebasedCompensationActivitiesStockOptionDetails</Role>
      <ShortName>Share-based Compensation (Schedule of Share-based Compensation Activities, Stock Option) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SharebasedCompensationTables</ParentRole>
      <Position>103</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>9955580 - Disclosure - Stock Repurchase Program (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/StockRepurchaseProgramDetails</Role>
      <ShortName>Stock Repurchase Program (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/StockRepurchaseProgram</ParentRole>
      <Position>104</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>9955581 - Disclosure - Related Party Transactions (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/RelatedPartyTransactionsNarrativeDetails</Role>
      <ShortName>Related Party Transactions (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/RelatedPartyTransactionsTables</ParentRole>
      <Position>105</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>9955582 - Disclosure - Related Party Transactions (Transactions by Type Table) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/RelatedPartyTransactionsTransactionsbyTypeTableDetails</Role>
      <ShortName>Related Party Transactions (Transactions by Type Table) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/RelatedPartyTransactionsTables</ParentRole>
      <Position>106</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>9955583 - Disclosure - Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/IncomeTaxesScheduleofComponentsofIncomeTaxExpenseBenefitDetails</Role>
      <ShortName>Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/IncomeTaxesTables</ParentRole>
      <Position>107</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>9955584 - Disclosure - Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/IncomeTaxesScheduleofEffectiveIncomeTaxRateReconciliationDetails</Role>
      <ShortName>Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/IncomeTaxesTables</ParentRole>
      <Position>108</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>9955585 - Disclosure - Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails</Role>
      <ShortName>Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/IncomeTaxesTables</ParentRole>
      <Position>109</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>9955586 - Disclosure - Income Taxes (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/IncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/IncomeTaxesTables</ParentRole>
      <Position>110</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>9955587 - Disclosure - Additional Financial Information (Prepaid Expenses) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/AdditionalFinancialInformationPrepaidExpensesDetails</Role>
      <ShortName>Additional Financial Information (Prepaid Expenses) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/AdditionalFinancialInformationTables</ParentRole>
      <Position>111</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>9955588 - Disclosure - Additional Financial Information (Concentration Of Risk) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/AdditionalFinancialInformationConcentrationOfRiskDetails</Role>
      <ShortName>Additional Financial Information (Concentration Of Risk) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/AdditionalFinancialInformationTables</ParentRole>
      <Position>112</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>9955589 - Disclosure - Additional Financial Information (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/AdditionalFinancialInformationNarrativeDetails</Role>
      <ShortName>Additional Financial Information (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/AdditionalFinancialInformationTables</ParentRole>
      <Position>113</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>9955590 - Disclosure - Segment Information (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SegmentInformationNarrativeDetails</Role>
      <ShortName>Segment Information (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SegmentInformationTables</ParentRole>
      <Position>114</Position>
    </Report>
    <Report instance="msgs-20250630.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>9955591 - Disclosure - Segment Information (Schedule Of Segment Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.msgsports.com/role/SegmentInformationScheduleOfSegmentInformationDetails</Role>
      <ShortName>Segment Information (Schedule Of Segment Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.msgsports.com/role/SegmentInformationTables</ParentRole>
      <Position>115</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" isDefinitelyFs="true" isUsgaap="true" original="msgs-20250630.htm">msgs-20250630.htm</File>
    <File>msgs-20250630.xsd</File>
    <File>msgs-20250630_cal.xml</File>
    <File>msgs-20250630_def.xml</File>
    <File>msgs-20250630_lab.xml</File>
    <File>msgs-20250630_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>msgs-20250630_g1.jpg</File>
    <File>msgs-20250630_g2.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="2">http://fasb.org/srt/2025</BaseTaxonomy>
    <BaseTaxonomy items="1134">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="16">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="40">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="5">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
