<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.3</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>603</ContextCount>
  <ElementCount>606</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>144</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>10</UnitCount>
  <MyReports>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Document - Audit Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/AuditInformation</Role>
      <ShortName>Audit Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>9952151 - Statement - Consolidated Statements of Earnings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ConsolidatedStatementsofEarnings</Role>
      <ShortName>Consolidated Statements of Earnings</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>9952152 - Statement - Consolidated Statements of Earnings (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ConsolidatedStatementsofEarningsParenthetical</Role>
      <ShortName>Consolidated Statements of Earnings (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>9952153 - Statement - Consolidated Statements of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ConsolidatedStatementsofComprehensiveIncome</Role>
      <ShortName>Consolidated Statements of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>9952154 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>9952155 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>9952156 - Statement - Consolidated Statements of Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ConsolidatedStatementsofEquity</Role>
      <ShortName>Consolidated Statements of Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>9952157 - Statement - Consolidated Statements of Equity (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ConsolidatedStatementsofEquityParenthetical</Role>
      <ShortName>Consolidated Statements of Equity (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>9952158 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ConsolidatedStatementsofCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>9952159 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>9952160 - Disclosure - REVENUE RECOGNITION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/REVENUERECOGNITION</Role>
      <ShortName>REVENUE RECOGNITION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>9952161 - Disclosure - WEIGHTED-AVERAGE COMMON SHARES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/WEIGHTEDAVERAGECOMMONSHARES</Role>
      <ShortName>WEIGHTED-AVERAGE COMMON SHARES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>9952162 - Disclosure - ACQUISITIONS AND DIVESTITURES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ACQUISITIONSANDDIVESTITURES</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>9952163 - Disclosure - DISCONTINUED OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/DISCONTINUEDOPERATIONS</Role>
      <ShortName>DISCONTINUED OPERATIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>9952164 - Disclosure - OTHER DEDUCTIONS, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/OTHERDEDUCTIONSNET</Role>
      <ShortName>OTHER DEDUCTIONS, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>9952165 - Disclosure - RESTRUCTURING COSTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/RESTRUCTURINGCOSTS</Role>
      <ShortName>RESTRUCTURING COSTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>9952166 - Disclosure - EQUITY METHOD INVESTMENT AND NOTE RECEIVABLE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/EQUITYMETHODINVESTMENTANDNOTERECEIVABLE</Role>
      <ShortName>EQUITY METHOD INVESTMENT AND NOTE RECEIVABLE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>9952167 - Disclosure - LEASES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/LEASES</Role>
      <ShortName>LEASES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>9952168 - Disclosure - GOODWILL AND OTHER INTANGIBLES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/GOODWILLANDOTHERINTANGIBLES</Role>
      <ShortName>GOODWILL AND OTHER INTANGIBLES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>9952169 - Disclosure - FINANCIAL INSTRUMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/FINANCIALINSTRUMENTS</Role>
      <ShortName>FINANCIAL INSTRUMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>9952170 - Disclosure - SHORT-TERM BORROWINGS AND LINES OF CREDIT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/SHORTTERMBORROWINGSANDLINESOFCREDIT</Role>
      <ShortName>SHORT-TERM BORROWINGS AND LINES OF CREDIT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>9952171 - Disclosure - LONG-TERM DEBT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/LONGTERMDEBT</Role>
      <ShortName>LONG-TERM DEBT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>9952172 - Disclosure - PENSION AND POSTRETIREMENT PLANS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/PENSIONANDPOSTRETIREMENTPLANS</Role>
      <ShortName>PENSION AND POSTRETIREMENT PLANS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>9952173 - Disclosure - CONTINGENT LIABILITIES AND COMMITMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/CONTINGENTLIABILITIESANDCOMMITMENTS</Role>
      <ShortName>CONTINGENT LIABILITIES AND COMMITMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>9952174 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/INCOMETAXES</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>9952175 - Disclosure - STOCK-BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/STOCKBASEDCOMPENSATION</Role>
      <ShortName>STOCK-BASED COMPENSATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>9952176 - Disclosure - COMMON AND PREFERRED STOCK</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/COMMONANDPREFERREDSTOCK</Role>
      <ShortName>COMMON AND PREFERRED STOCK</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>9952177 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSS</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>9952178 - Disclosure - BUSINESS SEGMENTS INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/BUSINESSSEGMENTSINFORMATION</Role>
      <ShortName>BUSINESS SEGMENTS INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>9952179 - Disclosure - OTHER FINANCIAL DATA</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/OTHERFINANCIALDATA</Role>
      <ShortName>OTHER FINANCIAL DATA</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>9952180 - Disclosure - QUARTERLY FINANCIAL INFORMATION (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/QUARTERLYFINANCIALINFORMATIONUNAUDITED</Role>
      <ShortName>QUARTERLY FINANCIAL INFORMATION (UNAUDITED)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.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>33</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.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>34</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.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>35</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9955511 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9955512 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9955513 - Disclosure - REVENUE RECOGNITION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/REVENUERECOGNITIONTables</Role>
      <ShortName>REVENUE RECOGNITION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/REVENUERECOGNITION</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9955514 - Disclosure - WEIGHTED-AVERAGE COMMON SHARES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/WEIGHTEDAVERAGECOMMONSHARESTables</Role>
      <ShortName>WEIGHTED-AVERAGE COMMON SHARES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/WEIGHTEDAVERAGECOMMONSHARES</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9955515 - Disclosure - ACQUISITIONS AND DIVESTITURES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ACQUISITIONSANDDIVESTITURESTables</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/ACQUISITIONSANDDIVESTITURES</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9955516 - Disclosure - DISCONTINUED OPERATIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/DISCONTINUEDOPERATIONSTables</Role>
      <ShortName>DISCONTINUED OPERATIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/DISCONTINUEDOPERATIONS</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9955517 - Disclosure - OTHER DEDUCTIONS, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/OTHERDEDUCTIONSNETTables</Role>
      <ShortName>OTHER DEDUCTIONS, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/OTHERDEDUCTIONSNET</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9955518 - Disclosure - RESTRUCTURING COSTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/RESTRUCTURINGCOSTSTables</Role>
      <ShortName>RESTRUCTURING COSTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/RESTRUCTURINGCOSTS</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9955519 - Disclosure - EQUITY METHOD INVESTMENT AND NOTE RECEIVABLE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/EQUITYMETHODINVESTMENTANDNOTERECEIVABLETables</Role>
      <ShortName>EQUITY METHOD INVESTMENT AND NOTE RECEIVABLE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/EQUITYMETHODINVESTMENTANDNOTERECEIVABLE</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9955520 - Disclosure - LEASES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/LEASESTables</Role>
      <ShortName>LEASES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/LEASES</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9955521 - Disclosure - GOODWILL AND OTHER INTANGIBLES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/GOODWILLANDOTHERINTANGIBLESTables</Role>
      <ShortName>GOODWILL AND OTHER INTANGIBLES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/GOODWILLANDOTHERINTANGIBLES</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9955522 - Disclosure - FINANCIAL INSTRUMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/FINANCIALINSTRUMENTSTables</Role>
      <ShortName>FINANCIAL INSTRUMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/FINANCIALINSTRUMENTS</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9955523 - Disclosure - SHORT-TERM BORROWINGS AND LINES OF CREDIT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/SHORTTERMBORROWINGSANDLINESOFCREDITTables</Role>
      <ShortName>SHORT-TERM BORROWINGS AND LINES OF CREDIT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/SHORTTERMBORROWINGSANDLINESOFCREDIT</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9955524 - Disclosure - LONG-TERM DEBT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/LONGTERMDEBTTables</Role>
      <ShortName>LONG-TERM DEBT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/LONGTERMDEBT</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9955525 - Disclosure - PENSION AND POSTRETIREMENT PLANS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/PENSIONANDPOSTRETIREMENTPLANSTables</Role>
      <ShortName>PENSION AND POSTRETIREMENT PLANS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/PENSIONANDPOSTRETIREMENTPLANS</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9955526 - Disclosure - INCOME TAXES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/INCOMETAXESTables</Role>
      <ShortName>INCOME TAXES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/INCOMETAXES</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9955527 - Disclosure - STOCK-BASED COMPENSATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/STOCKBASEDCOMPENSATIONTables</Role>
      <ShortName>STOCK-BASED COMPENSATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/STOCKBASEDCOMPENSATION</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9955528 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSTables</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSS</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9955529 - Disclosure - BUSINESS SEGMENTS INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/BUSINESSSEGMENTSINFORMATIONTables</Role>
      <ShortName>BUSINESS SEGMENTS INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/BUSINESSSEGMENTSINFORMATION</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9955530 - Disclosure - OTHER FINANCIAL DATA (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/OTHERFINANCIALDATATables</Role>
      <ShortName>OTHER FINANCIAL DATA (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/OTHERFINANCIALDATA</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9955531 - Disclosure - QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/QUARTERLYFINANCIALINFORMATIONUNAUDITEDTables</Role>
      <ShortName>QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.emerson.com/role/QUARTERLYFINANCIALINFORMATIONUNAUDITED</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9955532 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9955533 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Inventory (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofInventoryDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Inventory (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9955534 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Property, Plant and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofPropertyPlantandEquipmentDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Property, Plant and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9955535 - Disclosure - REVENUE RECOGNITION - Schedule of Contract Assets and Contract Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/REVENUERECOGNITIONScheduleofContractAssetsandContractLiabilitiesDetails</Role>
      <ShortName>REVENUE RECOGNITION - Schedule of Contract Assets and Contract Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9955536 - Disclosure - REVENUE RECOGNITION - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/REVENUERECOGNITIONNarrativeDetails</Role>
      <ShortName>REVENUE RECOGNITION - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9955537 - Disclosure - WEIGHTED-AVERAGE COMMON SHARES - Schedule Of Basic And Diluted Earnings Per Common Share Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/WEIGHTEDAVERAGECOMMONSHARESScheduleOfBasicAndDilutedEarningsPerCommonShareReconciliationDetails</Role>
      <ShortName>WEIGHTED-AVERAGE COMMON SHARES - Schedule Of Basic And Diluted Earnings Per Common Share Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9955538 - Disclosure - ACQUISITIONS AND DIVESTITURES - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ACQUISITIONSANDDIVESTITURESNarrativeDetails</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9955539 - Disclosure - ACQUISITIONS AND DIVESTITURES - Purchase Consideration Reflected in Acquisition Accounting for NI (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ACQUISITIONSANDDIVESTITURESPurchaseConsiderationReflectedinAcquisitionAccountingforNIDetails</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Purchase Consideration Reflected in Acquisition Accounting for NI (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9955540 - Disclosure - ACQUISITIONS AND DIVESTITURES - Schedule of Recognized Identifies Assets Acquired and Liabilities Assumed (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ACQUISITIONSANDDIVESTITURESScheduleofRecognizedIdentifiesAssetsAcquiredandLiabilitiesAssumedDetails</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Schedule of Recognized Identifies Assets Acquired and Liabilities Assumed (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9955541 - Disclosure - ACQUISITIONS AND DIVESTITURES - Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ACQUISITIONSANDDIVESTITURESFiniteLivedandIndefiniteLivedIntangibleAssetsAcquiredasPartofBusinessCombinationDetails</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9955542 - Disclosure - ACQUISITIONS AND DIVESTITURES - Business Acquisition, Pro Forma Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ACQUISITIONSANDDIVESTITURESBusinessAcquisitionProFormaInformationDetails</Role>
      <ShortName>ACQUISITIONS AND DIVESTITURES - Business Acquisition, Pro Forma Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9955543 - Disclosure - DISCONTINUED OPERATIONS - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/DISCONTINUEDOPERATIONSNarrativeDetails</Role>
      <ShortName>DISCONTINUED OPERATIONS - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9955544 - Disclosure - DISCONTINUED OPERATIONS - Financial Results (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/DISCONTINUEDOPERATIONSFinancialResultsDetails</Role>
      <ShortName>DISCONTINUED OPERATIONS - Financial Results (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9955545 - Disclosure - DISCONTINUED OPERATIONS - Net Cash from Operating and Investing Activities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/DISCONTINUEDOPERATIONSNetCashfromOperatingandInvestingActivitiesDetails</Role>
      <ShortName>DISCONTINUED OPERATIONS - Net Cash from Operating and Investing Activities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9955546 - Disclosure - OTHER DEDUCTIONS, NET (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/OTHERDEDUCTIONSNETDetails</Role>
      <ShortName>OTHER DEDUCTIONS, NET (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.emerson.com/role/OTHERDEDUCTIONSNETTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9955547 - Disclosure - RESTRUCTURING COSTS - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/RESTRUCTURINGCOSTSNarrativeDetails</Role>
      <ShortName>RESTRUCTURING COSTS - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9955548 - Disclosure - RESTRUCTURING COSTS - Schedule Of Restructuring Expense by Segment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/RESTRUCTURINGCOSTSScheduleOfRestructuringExpensebySegmentDetails</Role>
      <ShortName>RESTRUCTURING COSTS - Schedule Of Restructuring Expense by Segment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9955549 - Disclosure - RESTRUCTURING COSTS - Schedule of Restructuring Reserve by Type of Cost (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/RESTRUCTURINGCOSTSScheduleofRestructuringReservebyTypeofCostDetails</Role>
      <ShortName>RESTRUCTURING COSTS - Schedule of Restructuring Reserve by Type of Cost (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9955550 - Disclosure - EQUITY METHOD INVESTMENT AND NOTE RECEIVABLE - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/EQUITYMETHODINVESTMENTANDNOTERECEIVABLENarrativeDetails</Role>
      <ShortName>EQUITY METHOD INVESTMENT AND NOTE RECEIVABLE - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9955551 - Disclosure - EQUITY METHOD INVESTMENT AND NOTE RECEIVABLE - Schedule of Financial Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/EQUITYMETHODINVESTMENTANDNOTERECEIVABLEScheduleofFinancialInformationDetails</Role>
      <ShortName>EQUITY METHOD INVESTMENT AND NOTE RECEIVABLE - Schedule of Financial Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9955552 - Disclosure - LEASES - Schedule of Operating Lease Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/LEASESScheduleofOperatingLeaseCostsDetails</Role>
      <ShortName>LEASES - Schedule of Operating Lease Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>9955553 - Disclosure - LEASES - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/LEASESNarrativeDetails</Role>
      <ShortName>LEASES - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>9955554 - Disclosure - LEASES - Right of Use Assets and Operating Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/LEASESRightofUseAssetsandOperatingLeaseLiabilitiesDetails</Role>
      <ShortName>LEASES - Right of Use Assets and Operating Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>9955555 - Disclosure - LEASES - Schedule of Future Maturities of Operating Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/LEASESScheduleofFutureMaturitiesofOperatingLeaseLiabilitiesDetails</Role>
      <ShortName>LEASES - Schedule of Future Maturities of Operating Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>9955556 - Disclosure - GOODWILL AND OTHER INTANGIBLES - Schedule Of Change In Carry Amount Of Goodwill By Business Segment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/GOODWILLANDOTHERINTANGIBLESScheduleOfChangeInCarryAmountOfGoodwillByBusinessSegmentDetails</Role>
      <ShortName>GOODWILL AND OTHER INTANGIBLES - Schedule Of Change In Carry Amount Of Goodwill By Business Segment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>9955557 - Disclosure - GOODWILL AND OTHER INTANGIBLES - Schedule Of Gross Carrying Amount And Accumulated Amortization Of Identifiable Intangible Assets By Major Class (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/GOODWILLANDOTHERINTANGIBLESScheduleOfGrossCarryingAmountAndAccumulatedAmortizationOfIdentifiableIntangibleAssetsByMajorClassDetails</Role>
      <ShortName>GOODWILL AND OTHER INTANGIBLES - Schedule Of Gross Carrying Amount And Accumulated Amortization Of Identifiable Intangible Assets By Major Class (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>9955558 - Disclosure - GOODWILL AND OTHER INTANGIBLES - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/GOODWILLANDOTHERINTANGIBLESNarrativeDetails</Role>
      <ShortName>GOODWILL AND OTHER INTANGIBLES - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>9955559 - Disclosure - FINANCIAL INSTRUMENTS - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/FINANCIALINSTRUMENTSNarrativeDetails</Role>
      <ShortName>FINANCIAL INSTRUMENTS - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>9955560 - Disclosure - FINANCIAL INSTRUMENTS - Schedule Of Derivative Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/FINANCIALINSTRUMENTSScheduleOfDerivativeInstrumentsDetails</Role>
      <ShortName>FINANCIAL INSTRUMENTS - Schedule Of Derivative Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>9955561 - Disclosure - FINANCIAL INSTRUMENTS - Schedule Of Fair Values Of Derivative Contracts Outstanding (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/FINANCIALINSTRUMENTSScheduleOfFairValuesOfDerivativeContractsOutstandingDetails</Role>
      <ShortName>FINANCIAL INSTRUMENTS - Schedule Of Fair Values Of Derivative Contracts Outstanding (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>9955562 - Disclosure - SHORT-TERM BORROWINGS AND LINES OF CREDIT - Schedule Of Short-Term Debt And Current Maturities Of Long-Term Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/SHORTTERMBORROWINGSANDLINESOFCREDITScheduleOfShortTermDebtAndCurrentMaturitiesOfLongTermDebtDetails</Role>
      <ShortName>SHORT-TERM BORROWINGS AND LINES OF CREDIT - Schedule Of Short-Term Debt And Current Maturities Of Long-Term Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>9955563 - Disclosure - SHORT-TERM BORROWINGS AND LINES OF CREDIT - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/SHORTTERMBORROWINGSANDLINESOFCREDITNarrativeDetails</Role>
      <ShortName>SHORT-TERM BORROWINGS AND LINES OF CREDIT - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>9955564 - Disclosure - LONG-TERM DEBT - Schedule of Long-Term Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/LONGTERMDEBTScheduleofLongTermDebtDetails</Role>
      <ShortName>LONG-TERM DEBT - Schedule of Long-Term Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>9955565 - Disclosure - LONG-TERM DEBT- Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/LONGTERMDEBTNarrativeDetails</Role>
      <ShortName>LONG-TERM DEBT- Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>9955566 - Disclosure - PENSION AND POSTRETIREMENT PLANS - Schedule of Retirement Plans Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/PENSIONANDPOSTRETIREMENTPLANSScheduleofRetirementPlansExpenseDetails</Role>
      <ShortName>PENSION AND POSTRETIREMENT PLANS - Schedule of Retirement Plans Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>9955567 - Disclosure - PENSION AND POSTRETIREMENT PLANS - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/PENSIONANDPOSTRETIREMENTPLANSNarrativeDetails</Role>
      <ShortName>PENSION AND POSTRETIREMENT PLANS - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>9955568 - Disclosure - PENSION AND POSTRETIREMENT PLANS - Reconciliations of Actuarial Present Value of Projected Benefit Obligations and Fair Value of Plan Assets for Defined Benefit Pension Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/PENSIONANDPOSTRETIREMENTPLANSReconciliationsofActuarialPresentValueofProjectedBenefitObligationsandFairValueofPlanAssetsforDefinedBenefitPensionPlansDetails</Role>
      <ShortName>PENSION AND POSTRETIREMENT PLANS - Reconciliations of Actuarial Present Value of Projected Benefit Obligations and Fair Value of Plan Assets for Defined Benefit Pension Plans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>9955569 - Disclosure - PENSION AND POSTRETIREMENT PLANS - Schedule of Weighted-Average Assumptions used in Valuations of Pension Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/PENSIONANDPOSTRETIREMENTPLANSScheduleofWeightedAverageAssumptionsusedinValuationsofPensionBenefitsDetails</Role>
      <ShortName>PENSION AND POSTRETIREMENT PLANS - Schedule of Weighted-Average Assumptions used in Valuations of Pension Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>9955570 - Disclosure - PENSION AND POSTRETIREMENT PLANS - Schedule of Asset Allocations and Weighted-Average Target Allocations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/PENSIONANDPOSTRETIREMENTPLANSScheduleofAssetAllocationsandWeightedAverageTargetAllocationsDetails</Role>
      <ShortName>PENSION AND POSTRETIREMENT PLANS - Schedule of Asset Allocations and Weighted-Average Target Allocations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>9955571 - Disclosure - PENSION AND POSTRETIREMENT PLANS - Schedule of Fair Values of Defined Benefit Plan Assets Organized by Asset Class and Fair Value Hierarchy of ASC 820 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/PENSIONANDPOSTRETIREMENTPLANSScheduleofFairValuesofDefinedBenefitPlanAssetsOrganizedbyAssetClassandFairValueHierarchyofASC820Details</Role>
      <ShortName>PENSION AND POSTRETIREMENT PLANS - Schedule of Fair Values of Defined Benefit Plan Assets Organized by Asset Class and Fair Value Hierarchy of ASC 820 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>9955572 - Disclosure - CONTINGENT LIABILITIES AND COMMITMENTS - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/CONTINGENTLIABILITIESANDCOMMITMENTSNarrativeDetails</Role>
      <ShortName>CONTINGENT LIABILITIES AND COMMITMENTS - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>9955573 - Disclosure - INCOME TAXES - Schedule of Pretax Earnings from Continuing Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/INCOMETAXESScheduleofPretaxEarningsfromContinuingOperationsDetails</Role>
      <ShortName>INCOME TAXES - Schedule of Pretax Earnings from Continuing Operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>9955574 - Disclosure - INCOME TAXES - Schedule of Principal Components of Income Tax Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/INCOMETAXESScheduleofPrincipalComponentsofIncomeTaxExpenseDetails</Role>
      <ShortName>INCOME TAXES - Schedule of Principal Components of Income Tax Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>9955575 - Disclosure - INCOME TAXES - Schedule of Reconciliations of the U.S. Federal Statutory Tax Rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/INCOMETAXESScheduleofReconciliationsoftheUSFederalStatutoryTaxRateDetails</Role>
      <ShortName>INCOME TAXES - Schedule of Reconciliations of the U.S. Federal Statutory Tax Rate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>9955576 - Disclosure - INCOME TAXES - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/INCOMETAXESNarrativeDetails</Role>
      <ShortName>INCOME TAXES - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>9955577 - Disclosure - INCOME TAXES - Schedule of Unrecognized Tax Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/INCOMETAXESScheduleofUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>INCOME TAXES - Schedule of Unrecognized Tax Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>9955578 - Disclosure - INCOME TAXES - Schedule of Deferred Income Tax Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/INCOMETAXESScheduleofDeferredIncomeTaxAssetsandLiabilitiesDetails</Role>
      <ShortName>INCOME TAXES - Schedule of Deferred Income Tax Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>9955579 - Disclosure - STOCK-BASED COMPENSATION - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/STOCKBASEDCOMPENSATIONNarrativeDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>9955580 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Share-Based Payment Arrangement, Cost by Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/STOCKBASEDCOMPENSATIONScheduleofShareBasedPaymentArrangementCostbyPlanDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - Schedule of Share-Based Payment Arrangement, Cost by Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>9955581 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Performance Share Payout Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/STOCKBASEDCOMPENSATIONScheduleofPerformanceSharePayoutInformationDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - Schedule of Performance Share Payout Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>9955582 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Changes in Incentive Awards Outstanding (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/STOCKBASEDCOMPENSATIONScheduleofChangesinIncentiveAwardsOutstandingDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - Schedule of Changes in Incentive Awards Outstanding (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>9955583 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Supplemental Information for Incentive Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/STOCKBASEDCOMPENSATIONScheduleofSupplementalInformationforIncentiveAwardsDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - Schedule of Supplemental Information for Incentive Awards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>9955584 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Changes in Shares Subject to Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/STOCKBASEDCOMPENSATIONScheduleofChangesinSharesSubjecttoOptionsDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - Schedule of Changes in Shares Subject to Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>9955585 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Cash Proceeds Received and Tax Benefit from Share-based Payment Awards, Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/STOCKBASEDCOMPENSATIONScheduleofCashProceedsReceivedandTaxBenefitfromSharebasedPaymentAwardsOptionsDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION - Schedule of Cash Proceeds Received and Tax Benefit from Share-based Payment Awards, Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>9955586 - Disclosure - COMMON AND PREFERRED STOCK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/COMMONANDPREFERREDSTOCKDetails</Role>
      <ShortName>COMMON AND PREFERRED STOCK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.emerson.com/role/COMMONANDPREFERREDSTOCK</ParentRole>
      <Position>111</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>9955587 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSDetails</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.emerson.com/role/ACCUMULATEDOTHERCOMPREHENSIVEINCOMELOSSTables</ParentRole>
      <Position>112</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>9955588 - Disclosure - BUSINESS SEGMENTS INFORMATION - Schedule of Segment Reporting Information, by Segment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/BUSINESSSEGMENTSINFORMATIONScheduleofSegmentReportingInformationbySegmentDetails</Role>
      <ShortName>BUSINESS SEGMENTS INFORMATION - Schedule of Segment Reporting Information, by Segment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>113</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>9955589 - Disclosure - BUSINESS SEGMENTS INFORMATION - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/BUSINESSSEGMENTSINFORMATIONNarrativeDetails</Role>
      <ShortName>BUSINESS SEGMENTS INFORMATION - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>114</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>9955590 - Disclosure - BUSINESS SEGMENTS INFORMATION - Schedule of Financial Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/BUSINESSSEGMENTSINFORMATIONScheduleofFinancialInformationDetails</Role>
      <ShortName>BUSINESS SEGMENTS INFORMATION - Schedule of Financial Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>115</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>9955591 - Disclosure - BUSINESS SEGMENTS INFORMATION - Schedule of Financial Information by Geographic Area (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/BUSINESSSEGMENTSINFORMATIONScheduleofFinancialInformationbyGeographicAreaDetails</Role>
      <ShortName>BUSINESS SEGMENTS INFORMATION - Schedule of Financial Information by Geographic Area (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>116</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>9955592 - Disclosure - OTHER FINANCIAL DATA - Schedule of Other Items Reported In Earnings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/OTHERFINANCIALDATAScheduleofOtherItemsReportedInEarningsDetails</Role>
      <ShortName>OTHER FINANCIAL DATA - Schedule of Other Items Reported In Earnings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>117</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>9955593 - Disclosure - OTHER FINANCIAL DATA - Schedule of Depreciation and Amortization Expense Components (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/OTHERFINANCIALDATAScheduleofDepreciationandAmortizationExpenseComponentsDetails</Role>
      <ShortName>OTHER FINANCIAL DATA - Schedule of Depreciation and Amortization Expense Components (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>118</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R119.htm</HtmlFileName>
      <LongName>9955594 - Disclosure - OTHER FINANCIAL DATA - Schedule of Other Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/OTHERFINANCIALDATAScheduleofOtherAssetsDetails</Role>
      <ShortName>OTHER FINANCIAL DATA - Schedule of Other Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>119</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R120.htm</HtmlFileName>
      <LongName>9955595 - Disclosure - OTHER FINANCIAL DATA - Schedule of Accrued Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/OTHERFINANCIALDATAScheduleofAccruedExpensesDetails</Role>
      <ShortName>OTHER FINANCIAL DATA - Schedule of Accrued Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>120</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R121.htm</HtmlFileName>
      <LongName>9955596 - Disclosure - OTHER FINANCIAL DATA - Schedule of Other Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/OTHERFINANCIALDATAScheduleofOtherLiabilitiesDetails</Role>
      <ShortName>OTHER FINANCIAL DATA - Schedule of Other Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>121</Position>
    </Report>
    <Report instance="emr-20250930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R122.htm</HtmlFileName>
      <LongName>9955597 - Disclosure - QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - Schedule of Quarterly Financial Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.emerson.com/role/QUARTERLYFINANCIALINFORMATIONUNAUDITEDScheduleofQuarterlyFinancialInformationDetails</Role>
      <ShortName>QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - Schedule of Quarterly Financial Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.emerson.com/role/QUARTERLYFINANCIALINFORMATIONUNAUDITEDTables</ParentRole>
      <Position>122</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="emr-20250930.htm">emr-20250930.htm</File>
    <File>emr-20250930.xsd</File>
    <File>emr-20250930_cal.xml</File>
    <File>emr-20250930_def.xml</File>
    <File>emr-20250930_lab.xml</File>
    <File>emr-20250930_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>emr-20250930_g1.jpg</File>
    <File>emr-20250930_g2.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1971">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="15">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="47">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>
