<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.25.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>385</ContextCount>
  <ElementCount>564</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>140</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>12</UnitCount>
  <MyReports>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000002 - Document - Audit Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AuditInformation</Role>
      <ShortName>Audit Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>9952151 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>9952152 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="dec-20251231.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.div.energy/role/ConsolidatedStatementsofComprehensiveIncome</Role>
      <ShortName>Consolidated Statements of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>9952154 - Statement - Consolidated Statements of Changes in Stockholders??? Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/ConsolidatedStatementsofChangesinStockholdersEquity</Role>
      <ShortName>Consolidated Statements of Changes in Stockholders??? Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>9952155 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/ConsolidatedStatementsofCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>9952156 - Disclosure - Nature of the Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/NatureoftheBusiness</Role>
      <ShortName>Nature of the Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>9952157 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SummaryofSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>9952158 - Disclosure - Acquisitions &amp; Divestitures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AcquisitionsDivestitures</Role>
      <ShortName>Acquisitions &amp; Divestitures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>9952159 - Disclosure - Income Tax</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/IncomeTax</Role>
      <ShortName>Income Tax</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>9952160 - Disclosure - Earnings (Loss) Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/EarningsLossPerShare</Role>
      <ShortName>Earnings (Loss) Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>9952161 - Disclosure - Natural Gas &amp; Oil Properties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/NaturalGasOilProperties</Role>
      <ShortName>Natural Gas &amp; Oil Properties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>9952162 - Disclosure - Property, Plant &amp; Equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/PropertyPlantEquipment</Role>
      <ShortName>Property, Plant &amp; Equipment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>9952163 - Disclosure - Derivatives</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/Derivatives</Role>
      <ShortName>Derivatives</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>9952164 - Disclosure - Accounts Receivable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AccountsReceivable</Role>
      <ShortName>Accounts Receivable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>9952165 - Disclosure - Other Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/OtherAssets</Role>
      <ShortName>Other Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>9952166 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/StockholdersEquity</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>9952167 - Disclosure - Compensation Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/CompensationPlans</Role>
      <ShortName>Compensation Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>9952168 - Disclosure - Asset Retirement Obligations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AssetRetirementObligations</Role>
      <ShortName>Asset Retirement Obligations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>9952169 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>9952170 - Disclosure - Borrowings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/Borrowings</Role>
      <ShortName>Borrowings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>9952171 - Disclosure - Accounts Payable &amp; Accrued Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AccountsPayableAccruedLiabilities</Role>
      <ShortName>Accounts Payable &amp; Accrued Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>9952172 - Disclosure - Other Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/OtherLiabilities</Role>
      <ShortName>Other Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>9952173 - Disclosure - Fair Value</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/FairValue</Role>
      <ShortName>Fair Value</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>9952174 - Disclosure - Commitments &amp; Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/CommitmentsContingencies</Role>
      <ShortName>Commitments &amp; Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>9952175 - Disclosure - Supplemental Cash Flow Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SupplementalCashFlowInformation</Role>
      <ShortName>Supplemental Cash Flow Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>9952176 - Disclosure - Supplemental Quarterly Financial Information (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SupplementalQuarterlyFinancialInformationUnaudited</Role>
      <ShortName>Supplemental Quarterly Financial Information (Unaudited)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>9952177 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.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>30</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.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>31</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.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>32</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>9955511 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SummaryofSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.div.energy/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>9955512 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SummaryofSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9955513 - Disclosure - Acquisitions &amp; Divestitures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AcquisitionsDivestituresTables</Role>
      <ShortName>Acquisitions &amp; Divestitures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/AcquisitionsDivestitures</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9955514 - Disclosure - Income Tax (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/IncomeTaxTables</Role>
      <ShortName>Income Tax (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/IncomeTax</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9955515 - Disclosure - Earnings (Loss) Per Share - (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/EarningsLossPerShareTables</Role>
      <ShortName>Earnings (Loss) Per Share - (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/EarningsLossPerShare</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9955516 - Disclosure - Natural Gas &amp; Oil Properties (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/NaturalGasOilPropertiesTables</Role>
      <ShortName>Natural Gas &amp; Oil Properties (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/NaturalGasOilProperties</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9955517 - Disclosure - Property, Plant &amp; Equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/PropertyPlantEquipmentTables</Role>
      <ShortName>Property, Plant &amp; Equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/PropertyPlantEquipment</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9955518 - Disclosure - Derivatives (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/DerivativesTables</Role>
      <ShortName>Derivatives (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/Derivatives</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9955519 - Disclosure - Accounts Receivable (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AccountsReceivableTables</Role>
      <ShortName>Accounts Receivable (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/AccountsReceivable</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9955520 - Disclosure - Other Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/OtherAssetsTables</Role>
      <ShortName>Other Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/OtherAssets</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9955521 - Disclosure - Compensation Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/CompensationPlansTables</Role>
      <ShortName>Compensation Plans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/CompensationPlans</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9955522 - Disclosure - Asset Retirement Obligations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AssetRetirementObligationsTables</Role>
      <ShortName>Asset Retirement Obligations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/AssetRetirementObligations</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9955523 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/Leases</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9955524 - Disclosure - Borrowings (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/BorrowingsTables</Role>
      <ShortName>Borrowings (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/Borrowings</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9955525 - Disclosure - Accounts Payable &amp; Accrued Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AccountsPayableAccruedLiabilitiesTables</Role>
      <ShortName>Accounts Payable &amp; Accrued Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/AccountsPayableAccruedLiabilities</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9955526 - Disclosure - Other Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/OtherLiabilitiesTables</Role>
      <ShortName>Other Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/OtherLiabilities</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9955527 - Disclosure - Fair Value (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/FairValueTables</Role>
      <ShortName>Fair Value (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/FairValue</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9955528 - Disclosure - Commitments &amp; Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/CommitmentsContingenciesTables</Role>
      <ShortName>Commitments &amp; Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/CommitmentsContingencies</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9955529 - Disclosure - Supplemental Cash Flow Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SupplementalCashFlowInformationTables</Role>
      <ShortName>Supplemental Cash Flow Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/SupplementalCashFlowInformation</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9955530 - Disclosure - Supplemental Quarterly Financial Information (Unaudited) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SupplementalQuarterlyFinancialInformationUnauditedTables</Role>
      <ShortName>Supplemental Quarterly Financial Information (Unaudited) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.div.energy/role/SupplementalQuarterlyFinancialInformationUnaudited</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9955531 - Disclosure - Nature of the Business (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/NatureoftheBusinessDetails</Role>
      <ShortName>Nature of the Business (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/NatureoftheBusiness</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9955532 - Disclosure - Summary of Significant Accounting Policies - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SummaryofSignificantAccountingPoliciesNarrativeDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9955533 - Disclosure - Summary of Significant Accounting Policies - Schedule of Restricted Cash (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SummaryofSignificantAccountingPoliciesScheduleofRestrictedCashDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Restricted Cash (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9955534 - Disclosure - Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives of the Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SummaryofSignificantAccountingPoliciesScheduleofEstimatedUsefulLivesoftheAssetsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives of the Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9955535 - Disclosure - Acquisitions &amp; Divestitures - Acquisitions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AcquisitionsDivestituresAcquisitionsDetails</Role>
      <ShortName>Acquisitions &amp; Divestitures - Acquisitions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9955536 - Disclosure - Acquisitions &amp; Divestitures - Schedule of Asset Acquisition (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AcquisitionsDivestituresScheduleofAssetAcquisitionDetails</Role>
      <ShortName>Acquisitions &amp; Divestitures - Schedule of Asset Acquisition (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9955537 - Disclosure - Acquisitions &amp; Divestitures - Schedule of Business Acquisitions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AcquisitionsDivestituresScheduleofBusinessAcquisitionsDetails</Role>
      <ShortName>Acquisitions &amp; Divestitures - Schedule of Business Acquisitions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9955538 - Disclosure - Acquisitions &amp; Divestitures - Schedule of Pro Forma Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AcquisitionsDivestituresScheduleofProFormaInformationDetails</Role>
      <ShortName>Acquisitions &amp; Divestitures - Schedule of Pro Forma Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9955539 - Disclosure - Acquisitions &amp; Divestitures - Divestitures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AcquisitionsDivestituresDivestituresDetails</Role>
      <ShortName>Acquisitions &amp; Divestitures - Divestitures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9955540 - Disclosure - Income Tax - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/IncomeTaxNarrativeDetails</Role>
      <ShortName>Income Tax - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9955541 - Disclosure - Income Tax - Schedule of Provision for Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/IncomeTaxScheduleofProvisionforIncomeTaxesDetails</Role>
      <ShortName>Income Tax - Schedule of Provision for Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9955542 - Disclosure - Income Tax - Schedule of Differences Between the Statutory U.S. Federal Income Tax Rate and the Effective Tax Rates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/IncomeTaxScheduleofDifferencesBetweentheStatutoryUSFederalIncomeTaxRateandtheEffectiveTaxRatesDetails</Role>
      <ShortName>Income Tax - Schedule of Differences Between the Statutory U.S. Federal Income Tax Rate and the Effective Tax Rates (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9955543 - Disclosure - Income Tax - Schedule of Deferred Tax Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/IncomeTaxScheduleofDeferredTaxAssetsandLiabilitiesDetails</Role>
      <ShortName>Income Tax - Schedule of Deferred Tax Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9955544 - Disclosure - Income Tax - Cash Paid for Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/IncomeTaxCashPaidforIncomeTaxesDetails</Role>
      <ShortName>Income Tax - Cash Paid for Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9955545 - Disclosure - Earnings (Loss) Per Share - (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/EarningsLossPerShareDetails</Role>
      <ShortName>Earnings (Loss) Per Share - (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/EarningsLossPerShareTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9955546 - Disclosure - Natural Gas &amp; Oil Properties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/NaturalGasOilPropertiesDetails</Role>
      <ShortName>Natural Gas &amp; Oil Properties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/NaturalGasOilPropertiesTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9955547 - Disclosure - Property, Plant &amp; Equipment - Schedule of Property, Plant and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/PropertyPlantEquipmentScheduleofPropertyPlantandEquipmentDetails</Role>
      <ShortName>Property, Plant &amp; Equipment - Schedule of Property, Plant and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9955548 - Disclosure - Property, Plant &amp; Equipment - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/PropertyPlantEquipmentNarrativeDetails</Role>
      <ShortName>Property, Plant &amp; Equipment - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9955549 - Disclosure - Derivatives - Schedule of Net Fair Value of Derivative Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/DerivativesScheduleofNetFairValueofDerivativeFinancialInstrumentsDetails</Role>
      <ShortName>Derivatives - Schedule of Net Fair Value of Derivative Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9955550 - Disclosure - Derivatives - Schedule of Net Derivatives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/DerivativesScheduleofNetDerivativesDetails</Role>
      <ShortName>Derivatives - Schedule of Net Derivatives (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9955551 - Disclosure - Derivatives - Schedule of Company???s Recognized Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/DerivativesScheduleofCompanysRecognizedAssetsandLiabilitiesDetails</Role>
      <ShortName>Derivatives - Schedule of Company???s Recognized Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9955552 - Disclosure - Derivatives - Schedule of Gains (Losses) on Derivative Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/DerivativesScheduleofGainsLossesonDerivativeFinancialInstrumentsDetails</Role>
      <ShortName>Derivatives - Schedule of Gains (Losses) on Derivative Financial Instruments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9955553 - Disclosure - Derivatives - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/DerivativesNarrativeDetails</Role>
      <ShortName>Derivatives - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9955554 - Disclosure - Accounts Receivable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AccountsReceivableDetails</Role>
      <ShortName>Accounts Receivable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/AccountsReceivableTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9955555 - Disclosure - Other Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/OtherAssetsDetails</Role>
      <ShortName>Other Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/OtherAssetsTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>9955556 - Disclosure - Stockholders' Equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/StockholdersEquityDetails</Role>
      <ShortName>Stockholders' Equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/StockholdersEquity</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>9955557 - Disclosure - Compensation Plans - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/CompensationPlansNarrativeDetails</Role>
      <ShortName>Compensation Plans - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>9955558 - Disclosure - Compensation Plans - Schedule of RSU Awards Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/CompensationPlansScheduleofRSUAwardsActivityDetails</Role>
      <ShortName>Compensation Plans - Schedule of RSU Awards Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>9955559 - Disclosure - Compensation Plans - Schedule of PSU Awards Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/CompensationPlansScheduleofPSUAwardsActivityDetails</Role>
      <ShortName>Compensation Plans - Schedule of PSU Awards Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>9955560 - Disclosure - Compensation Plans - Schedule of Valuation Assumptions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/CompensationPlansScheduleofValuationAssumptionsDetails</Role>
      <ShortName>Compensation Plans - Schedule of Valuation Assumptions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>9955561 - Disclosure - Compensation Plans - Schedule of Share-Based Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/CompensationPlansScheduleofShareBasedCompensationExpenseDetails</Role>
      <ShortName>Compensation Plans - Schedule of Share-Based Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>9955562 - Disclosure - Asset Retirement Obligations - Schedule of Asset Retirement Obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AssetRetirementObligationsScheduleofAssetRetirementObligationsDetails</Role>
      <ShortName>Asset Retirement Obligations - Schedule of Asset Retirement Obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>9955563 - Disclosure - Leases - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/LeasesNarrativeDetails</Role>
      <ShortName>Leases - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>9955564 - Disclosure - Leases - Schedule of Components of Lease Costs and Other Information Related to Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/LeasesScheduleofComponentsofLeaseCostsandOtherInformationRelatedtoLeasesDetails</Role>
      <ShortName>Leases - Schedule of Components of Lease Costs and Other Information Related to Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>9955565 - Disclosure - Leases - Schedule of Maturities of Operating and Financing Lease Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/LeasesScheduleofMaturitiesofOperatingandFinancingLeaseLiabilitiesDetails</Role>
      <ShortName>Leases - Schedule of Maturities of Operating and Financing Lease Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>9955566 - Disclosure - Leases - Schedule of Weighted-Average Lease Term and Discount Rate (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/LeasesScheduleofWeightedAverageLeaseTermandDiscountRateDetails</Role>
      <ShortName>Leases - Schedule of Weighted-Average Lease Term and Discount Rate (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>9955567 - Disclosure - Borrowings - Schedule of Company???s Borrowings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/BorrowingsScheduleofCompanysBorrowingsDetails</Role>
      <ShortName>Borrowings - Schedule of Company???s Borrowings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>9955568 - Disclosure - Borrowings - Credit Facility (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/BorrowingsCreditFacilityDetails</Role>
      <ShortName>Borrowings - Credit Facility (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>9955569 - Disclosure - Borrowings - Term Loan I (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/BorrowingsTermLoanIDetails</Role>
      <ShortName>Borrowings - Term Loan I (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>9955570 - Disclosure - Borrowings - Term Loan II (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/BorrowingsTermLoanIIDetails</Role>
      <ShortName>Borrowings - Term Loan II (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>9955571 - Disclosure - Borrowings - ABS I Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsABSINotesDetails</Role>
      <ShortName>Borrowings - ABS I Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>9955572 - Disclosure - Borrowings - ABS II Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsABSIINotesDetails</Role>
      <ShortName>Borrowings - ABS II Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>9955573 - Disclosure - Borrowings - ABS III Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsABSIIINotesDetails</Role>
      <ShortName>Borrowings - ABS III Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>9955574 - Disclosure - Borrowings - ABS IV Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsABSIVNotesDetails</Role>
      <ShortName>Borrowings - ABS IV Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>9955575 - Disclosure - Borrowings - ABS V Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsABSVNotesDetails</Role>
      <ShortName>Borrowings - ABS V Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>9955576 - Disclosure - Borrowings - ABS VI Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsABSVINotesDetails</Role>
      <ShortName>Borrowings - ABS VI Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>9955577 - Disclosure - Borrowings - ABS VII Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsABSVIINotesDetails</Role>
      <ShortName>Borrowings - ABS VII Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>9955578 - Disclosure - Borrowings - ABS VIII Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsABSVIIINotesDetails</Role>
      <ShortName>Borrowings - ABS VIII Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>9955579 - Disclosure - Borrowings - ABS IX Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsABSIXNotesDetails</Role>
      <ShortName>Borrowings - ABS IX Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>9955580 - Disclosure - Borrowings - ABS X Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsABSXNotesDetails</Role>
      <ShortName>Borrowings - ABS X Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>9955581 - Disclosure - Borrowings - ABS Maverick Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsABSMaverickNotesDetails</Role>
      <ShortName>Borrowings - ABS Maverick Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>9955582 - Disclosure - Borrowings - ABS XI Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsABSXINotesDetails</Role>
      <ShortName>Borrowings - ABS XI Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>9955583 - Disclosure - Borrowings - Nordic Bonds (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/BorrowingsNordicBondsDetails</Role>
      <ShortName>Borrowings - Nordic Bonds (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>9955584 - Disclosure - Borrowings - Oaktree Seller???s Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.div.energy/role/BorrowingsOaktreeSellersNotesDetails</Role>
      <ShortName>Borrowings - Oaktree Seller???s Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>9955585 - Disclosure - Borrowings - Early Retirement of Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/BorrowingsEarlyRetirementofDebtDetails</Role>
      <ShortName>Borrowings - Early Retirement of Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>9955586 - Disclosure - Borrowings - Debt Covenants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/BorrowingsDebtCovenantsDetails</Role>
      <ShortName>Borrowings - Debt Covenants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>9955587 - Disclosure - Borrowings - Schedule of Future Maturities of Total Borrowings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/BorrowingsScheduleofFutureMaturitiesofTotalBorrowingsDetails</Role>
      <ShortName>Borrowings - Schedule of Future Maturities of Total Borrowings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>9955588 - Disclosure - Borrowings - Schedule of Interest Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/BorrowingsScheduleofInterestExpenseDetails</Role>
      <ShortName>Borrowings - Schedule of Interest Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>9955589 - Disclosure - Borrowings - Schedule of Fair Value of the Company???s Debt Structures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/BorrowingsScheduleofFairValueoftheCompanysDebtStructuresDetails</Role>
      <ShortName>Borrowings - Schedule of Fair Value of the Company???s Debt Structures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>111</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>9955590 - Disclosure - Accounts Payable &amp; Accrued Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/AccountsPayableAccruedLiabilitiesDetails</Role>
      <ShortName>Accounts Payable &amp; Accrued Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/AccountsPayableAccruedLiabilitiesTables</ParentRole>
      <Position>112</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>9955591 - Disclosure - Other Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/OtherLiabilitiesDetails</Role>
      <ShortName>Other Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/OtherLiabilitiesTables</ParentRole>
      <Position>113</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>9955592 - Disclosure - Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/FairValueDetails</Role>
      <ShortName>Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/FairValueTables</ParentRole>
      <Position>114</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>9955593 - Disclosure - Commitments &amp; Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/CommitmentsContingenciesDetails</Role>
      <ShortName>Commitments &amp; Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/CommitmentsContingenciesTables</ParentRole>
      <Position>115</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>9955594 - Disclosure - Supplemental Cash Flow Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SupplementalCashFlowInformationDetails</Role>
      <ShortName>Supplemental Cash Flow Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/SupplementalCashFlowInformationTables</ParentRole>
      <Position>116</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>9955595 - Disclosure - Supplemental Quarterly Financial Information (Unaudited) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SupplementalQuarterlyFinancialInformationUnauditedDetails</Role>
      <ShortName>Supplemental Quarterly Financial Information (Unaudited) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/SupplementalQuarterlyFinancialInformationUnauditedTables</ParentRole>
      <Position>117</Position>
    </Report>
    <Report instance="dec-20251231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>9955596 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.div.energy/role/SubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.div.energy/role/SubsequentEvents</ParentRole>
      <Position>118</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="dec-20251231.htm">dec-20251231.htm</File>
    <File>dec-20251231.xsd</File>
    <File>dec-20251231_cal.xml</File>
    <File>dec-20251231_def.xml</File>
    <File>dec-20251231_lab.xml</File>
    <File>dec-20251231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>dec-20251231_g1.gif</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="1558">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="15">http://xbrl.sec.gov/cyd/2025</BaseTaxonomy>
    <BaseTaxonomy items="38">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>
