<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>305</ContextCount>
  <ElementCount>316</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>110</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00090 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/StatementCondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00105 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/StatementCondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00200 - Statement - Condensed Consolidated Statements Of Operations And Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/StatementCondensedConsolidatedStatementsOfOperationsAndComprehensiveIncome</Role>
      <ShortName>Condensed Consolidated Statements Of Operations And Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00400 - Statement - Condensed Consolidated Statements Of Capitalization</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/StatementCondensedConsolidatedStatementsOfCapitalization</Role>
      <ShortName>Condensed Consolidated Statements Of Capitalization</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00405 - Statement - Condensed Consolidated Statements Of Capitalization (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/StatementCondensedConsolidatedStatementsOfCapitalizationParenthetical</Role>
      <ShortName>Condensed Consolidated Statements Of Capitalization (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>00500 - Statement - Condensed Consolidated Statements Of Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/StatementCondensedConsolidatedStatementsOfEquity</Role>
      <ShortName>Condensed Consolidated Statements Of Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>00505 - Statement - Condensed Consolidated Statements Of Equity (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/StatementCondensedConsolidatedStatementsOfEquityParenthetical</Role>
      <ShortName>Condensed Consolidated Statements Of Equity (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>00600 - Statement - Condensed Consolidated Statements Of Cash Flow</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/StatementCondensedConsolidatedStatementsOfCashFlow</Role>
      <ShortName>Condensed Consolidated Statements Of Cash Flow</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>00605 - Statement - Condensed Consolidated Statements Of Cash Flow (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/StatementCondensedConsolidatedStatementsOfCashFlowParenthetical</Role>
      <ShortName>Condensed Consolidated Statements Of Cash Flow (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10101 - Disclosure - Basis Of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureBasisOfPresentation</Role>
      <ShortName>Basis Of Presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10201 - Disclosure - Plan Of Merger With American Water</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosurePlanOfMergerWithAmericanWater</Role>
      <ShortName>Plan Of Merger With American Water</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10301 - Disclosure - Revenue Recognition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureRevenueRecognition</Role>
      <ShortName>Revenue Recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10401 - Disclosure - Water And Wastewater Utility Acquisitions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureWaterAndWastewaterUtilityAcquisitions</Role>
      <ShortName>Water And Wastewater Utility Acquisitions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>10501 - Disclosure - Convertible Note Investment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureConvertibleNoteInvestment</Role>
      <ShortName>Convertible Note Investment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>10601 - Disclosure - Goodwill</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureGoodwill</Role>
      <ShortName>Goodwill</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>10701 - Disclosure - Capitalization</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureCapitalization</Role>
      <ShortName>Capitalization</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>10801 - Disclosure - Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureFinancialInstruments</Role>
      <ShortName>Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>10901 - Disclosure - Net Income Per Common Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureNetIncomePerCommonShare</Role>
      <ShortName>Net Income Per Common Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>11001 - Disclosure - Stock-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureStockBasedCompensation</Role>
      <ShortName>Stock-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>11101 - Disclosure - Pension Plans And Other Postretirement Benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosurePensionPlansAndOtherPostretirementBenefits</Role>
      <ShortName>Pension Plans And Other Postretirement Benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>11201 - Disclosure - Rate Activity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureRateActivity</Role>
      <ShortName>Rate Activity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>11301 - Disclosure - Taxes Other Than Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureTaxesOtherThanIncomeTaxes</Role>
      <ShortName>Taxes Other Than Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>11401 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureSegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>11501 - Disclosure - Commitments And Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments And Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>11601 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>11701 - Disclosure - Recent Accounting Pronouncements And Disclosure Rules</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureRecentAccountingPronouncementsAndDisclosureRules</Role>
      <ShortName>Recent Accounting Pronouncements And Disclosure Rules</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>20101 - Disclosure - Basis Of Presentation (Policy)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureBasisOfPresentationPolicy</Role>
      <ShortName>Basis Of Presentation (Policy)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureRecentAccountingPronouncementsAndDisclosureRules</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>30303 - Disclosure - Revenue Recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureRevenueRecognitionTables</Role>
      <ShortName>Revenue Recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureRevenueRecognition</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>30503 - Disclosure - Convertible Note Investment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureConvertibleNoteInvestmentTables</Role>
      <ShortName>Convertible Note Investment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureConvertibleNoteInvestment</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>30603 - Disclosure - Goodwill (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureGoodwillTables</Role>
      <ShortName>Goodwill (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureGoodwill</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>30803 - Disclosure - Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureFinancialInstrumentsTables</Role>
      <ShortName>Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureFinancialInstruments</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>30903 - Disclosure - Net Income per Common Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureNetIncomePerCommonShareTables</Role>
      <ShortName>Net Income per Common Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>31003 - Disclosure - Stock-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureStockBasedCompensationTables</Role>
      <ShortName>Stock-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureStockBasedCompensation</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>31103 - Disclosure - Pension Plans And Other Postretirement Benefits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosurePensionPlansAndOtherPostretirementBenefitsTables</Role>
      <ShortName>Pension Plans And Other Postretirement Benefits (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosurePensionPlansAndOtherPostretirementBenefits</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>31303 - Disclosure - Taxes Other Than Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureTaxesOtherThanIncomeTaxesTables</Role>
      <ShortName>Taxes Other Than Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureTaxesOtherThanIncomeTaxes</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>31403 - Disclosure - Segment Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureSegmentInformationTables</Role>
      <ShortName>Segment Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureSegmentInformation</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>40201 - Disclosure - Plan Of Merger With American Water (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosurePlanOfMergerWithAmericanWaterNarrativeDetails</Role>
      <ShortName>Plan Of Merger With American Water (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosurePlanOfMergerWithAmericanWater</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>40302 - Disclosure - Revenue Recognition (Schedule Of Disaggregation Of Revenue) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureRevenueRecognitionScheduleOfDisaggregationOfRevenueDetails</Role>
      <ShortName>Revenue Recognition (Schedule Of Disaggregation Of Revenue) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureRevenueRecognitionTables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>40401 - Disclosure - Water And Wastewater Utility Acquisitions (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureWaterAndWastewaterUtilityAcquisitionsNarrativeDetails</Role>
      <ShortName>Water And Wastewater Utility Acquisitions (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureWaterAndWastewaterUtilityAcquisitions</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>40501 - Disclosure - Convertible Note Investment (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureConvertibleNoteInvestmentNarrativeDetails</Role>
      <ShortName>Convertible Note Investment (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureConvertibleNoteInvestmentTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>40502 - Disclosure - Convertible Note Investment (Schedule Of Changes In The Fair Value Of This Level 3 Investment) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureConvertibleNoteInvestmentScheduleOfChangesInFairValueOfThisLevel3InvestmentDetails</Role>
      <ShortName>Convertible Note Investment (Schedule Of Changes In The Fair Value Of This Level 3 Investment) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureConvertibleNoteInvestmentTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>40601 - Disclosure - Goodwill (Schedule Of Goodwill) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureGoodwillScheduleOfGoodwillDetails</Role>
      <ShortName>Goodwill (Schedule Of Goodwill) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureGoodwillTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>40701 - Disclosure - Capitalization (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureCapitalizationNarrativeDetails</Role>
      <ShortName>Capitalization (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureCapitalization</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>40801 - Disclosure - Financial Instruments (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureFinancialInstrumentsNarrativeDetails</Role>
      <ShortName>Financial Instruments (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureFinancialInstrumentsTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>40802 - Disclosure - Financial Instruments (Summary Of Unrealized Gain And Losses) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureFinancialInstrumentsSummaryOfUnrealizedGainAndLossesDetails</Role>
      <ShortName>Financial Instruments (Summary Of Unrealized Gain And Losses) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureFinancialInstrumentsTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>40803 - Disclosure - Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values Of Long-Term Debt) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureFinancialInstrumentsScheduleOfCarryingAmountsAndEstimatedFairValuesOfLongTermDebtDetails</Role>
      <ShortName>Financial Instruments (Schedule Of Carrying Amounts And Estimated Fair Values Of Long-Term Debt) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureFinancialInstrumentsTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>40901 - Disclosure - Net Income Per Common Share (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureNetIncomePerCommonShareNarrativeDetails</Role>
      <ShortName>Net Income Per Common Share (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureNetIncomePerCommonShare</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>40902 - Disclosure - Net Income Per Common Share (Schedule Of Earnings Per Share) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureNetIncomePerCommonShareScheduleOfEarningsPerShareDetails</Role>
      <ShortName>Net Income Per Common Share (Schedule Of Earnings Per Share) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureNetIncomePerCommonShare</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>41001 - Disclosure - Stock-Based Compensation (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureStockBasedCompensationNarrativeDetails</Role>
      <ShortName>Stock-Based Compensation (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>41002 - Disclosure - Stock-Based Compensation (Schedule Of Performance Goals) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureStockBasedCompensationScheduleOfPerformanceGoalsDetails</Role>
      <ShortName>Stock-Based Compensation (Schedule Of Performance Goals) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>41003 - Disclosure - Stock-Based Compensation (Summary Of Compensation Costs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureStockBasedCompensationSummaryOfCompensationCostsDetails</Role>
      <ShortName>Stock-Based Compensation (Summary Of Compensation Costs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>41004 - Disclosure - Stock-Based Compensation (Summary Of PSU Transactions) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureStockBasedCompensationSummaryOfPsuTransactionsDetails</Role>
      <ShortName>Stock-Based Compensation (Summary Of PSU Transactions) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>41005 - Disclosure - Stock-Based Compensation (Summary Of RSU Transactions) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureStockBasedCompensationSummaryOfRsuTransactionsDetails</Role>
      <ShortName>Stock-Based Compensation (Summary Of RSU Transactions) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>41006 - Disclosure - Stock-Based Compensation (Assumptions Used In The Pricing Model) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureStockBasedCompensationAssumptionsUsedInPricingModelDetails</Role>
      <ShortName>Stock-Based Compensation (Assumptions Used In The Pricing Model) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>41007 - Disclosure - Stock-Based Compensation (Summary Of Stock Option Transactions) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureStockBasedCompensationSummaryOfStockOptionTransactionsDetails</Role>
      <ShortName>Stock-Based Compensation (Summary Of Stock Option Transactions) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>41009 - Disclosure - Stock-Based Compensation (Summary Of Restricted Stock Transactions) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureStockBasedCompensationSummaryOfRestrictedStockTransactionsDetails</Role>
      <ShortName>Stock-Based Compensation (Summary Of Restricted Stock Transactions) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>41101 - Disclosure - Pension Plans And Other Postretirement Benefits (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosurePensionPlansAndOtherPostretirementBenefitsNarrativeDetails</Role>
      <ShortName>Pension Plans And Other Postretirement Benefits (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosurePensionPlansAndOtherPostretirementBenefitsTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>41102 - Disclosure - Pension Plans And Other Postretirement Benefits (Components Of Net Periodic Benefit Cost) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosurePensionPlansAndOtherPostretirementBenefitsComponentsOfNetPeriodicBenefitCostDetails</Role>
      <ShortName>Pension Plans And Other Postretirement Benefits (Components Of Net Periodic Benefit Cost) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosurePensionPlansAndOtherPostretirementBenefitsTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>41201 - Disclosure - Rate Activity (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureRateActivityNarrativeDetails</Role>
      <ShortName>Rate Activity (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureRateActivity</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>41301 - Disclosure - Taxes Other Than Income Taxes (Components Of Taxes Other Than Income Taxes) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureTaxesOtherThanIncomeTaxesComponentsOfTaxesOtherThanIncomeTaxesDetails</Role>
      <ShortName>Taxes Other Than Income Taxes (Components Of Taxes Other Than Income Taxes) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureTaxesOtherThanIncomeTaxesTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>41401 - Disclosure - Segment Information (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureSegmentInformationNarrativeDetails</Role>
      <ShortName>Segment Information (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureSegmentInformationTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>41402 - Disclosure - Segment Information (Company's Reportable Segments And Reconciliations To Consolidated Amounts) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureSegmentInformationCompanySReportableSegmentsAndReconciliationsToConsolidatedAmountsDetails</Role>
      <ShortName>Segment Information (Company's Reportable Segments And Reconciliations To Consolidated Amounts) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureSegmentInformationTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>41506 - Disclosure - Commitments And Contingencies (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureCommitmentsAndContingenciesNarrativeDetails</Role>
      <ShortName>Commitments And Contingencies (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>41601 - Disclosure - Income Taxes (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureIncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.essential.co/role/DisclosureIncomeTaxes</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="wtrg-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>995446 - Disclosure - Insider Trading Arrangements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.essential.co/role/DisclosureInsiderTradingArrangementsDetails</Role>
      <ShortName>Insider Trading Arrangements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>wtrg-20260331.xsd</File>
    <File>wtrg-20260331_cal.xml</File>
    <File>wtrg-20260331_def.xml</File>
    <File>wtrg-20260331_lab.xml</File>
    <File>wtrg-20260331_pre.xml</File>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="wtrg-20260331x10q.htm">wtrg-20260331x10q.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="770">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="29">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="16">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
