<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.20.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>504</ContextCount>
  <ElementCount>641</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>167</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>18</UnitCount>
  <MyReports>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000010001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>100010002 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>100020003 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>100030004 - Statement - Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ConsolidatedStatementsofOperations</Role>
      <ShortName>Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>100040005 - Statement - Consolidated Statements of Operations (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ConsolidatedStatementsofOperationsParenthetical</Role>
      <ShortName>Consolidated Statements of Operations (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>100050006 - Statement - Consolidated Statements of Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ConsolidatedStatementsofStockholdersEquity</Role>
      <ShortName>Consolidated Statements of Stockholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>100060007 - Statement - Consolidated Statements of Stockholders' Equity (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ConsolidatedStatementsofStockholdersEquityParenthetical</Role>
      <ShortName>Consolidated Statements of Stockholders' Equity (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>100070008 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ConsolidatedStatementsofCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>100080009 - Statement - Consolidated Statements of Cash Flows (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ConsolidatedStatementsofCashFlowsParenthetical</Role>
      <ShortName>Consolidated Statements of Cash Flows (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>210011001 - Disclosure - Description of Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/DescriptionofBusiness</Role>
      <ShortName>Description of Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>210021002 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SummaryofSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>210081003 - Disclosure - Revenue Recognition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/RevenueRecognition</Role>
      <ShortName>Revenue Recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>210101004 - Disclosure - Acquisitions and Divestitures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AcquisitionsandDivestitures</Role>
      <ShortName>Acquisitions and Divestitures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>210161005 - Disclosure - Property and Equipment, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/PropertyandEquipmentNet</Role>
      <ShortName>Property and Equipment, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>210221006 - Disclosure - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/EarningsPerShare</Role>
      <ShortName>Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>210251007 - Disclosure - Borrowings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/Borrowings</Role>
      <ShortName>Borrowings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>210341008 - Disclosure - Derivative Instruments and Hedging Activities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivities</Role>
      <ShortName>Derivative Instruments and Hedging Activities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>210421009 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>210471010 - Disclosure - Share-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ShareBasedCompensation</Role>
      <ShortName>Share-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>210581011 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/StockholdersEquity</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>210601012 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>210661013 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>210721014 - Disclosure - Asset Retirement Obligations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AssetRetirementObligations</Role>
      <ShortName>Asset Retirement Obligations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>210751015 - Disclosure - Accounts Receivable, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AccountsReceivableNet</Role>
      <ShortName>Accounts Receivable, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>210781016 - Disclosure - Accounts Payable and Accrued Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AccountsPayableandAccruedLiabilities</Role>
      <ShortName>Accounts Payable and Accrued Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>210811017 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/CommitmentsandContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>210861018 - Disclosure - Subsequent Events (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SubsequentEventsUnaudited</Role>
      <ShortName>Subsequent Events (Unaudited)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>210891019 - Disclosure - Supplemental Information on Oil and Natural Gas Properties (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnaudited</Role>
      <ShortName>Supplemental Information on Oil and Natural Gas Properties (Unaudited)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>210971020 - Disclosure - Supplemental Quarterly Financial Information (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SupplementalQuarterlyFinancialInformationUnaudited</Role>
      <ShortName>Supplemental Quarterly Financial Information (Unaudited)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>220032001 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SummaryofSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.callon.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>230043001 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SummaryofSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>230113002 - Disclosure - Acquisitions and Divestitures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AcquisitionsandDivestituresTables</Role>
      <ShortName>Acquisitions and Divestitures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/AcquisitionsandDivestitures</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>230173003 - Disclosure - Property and Equipment, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/PropertyandEquipmentNetTables</Role>
      <ShortName>Property and Equipment, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/PropertyandEquipmentNet</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>230233004 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/EarningsPerShareTables</Role>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/EarningsPerShare</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>230263005 - Disclosure - Borrowings (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/BorrowingsTables</Role>
      <ShortName>Borrowings (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/Borrowings</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>230353006 - Disclosure - Derivative Instruments and Hedging Activities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesTables</Role>
      <ShortName>Derivative Instruments and Hedging Activities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivities</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>230433007 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/FairValueMeasurements</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>230483008 - Disclosure - Share-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ShareBasedCompensationTables</Role>
      <ShortName>Share-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/ShareBasedCompensation</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>230613009 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/IncomeTaxes</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>230673010 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/Leases</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>230733011 - Disclosure - Asset Retirement Obligations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AssetRetirementObligationsTables</Role>
      <ShortName>Asset Retirement Obligations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/AssetRetirementObligations</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>230763012 - Disclosure - Accounts Receivable, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AccountsReceivableNetTables</Role>
      <ShortName>Accounts Receivable, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/AccountsReceivableNet</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>230793013 - Disclosure - Accounts Payable and Accrued Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AccountsPayableandAccruedLiabilitiesTables</Role>
      <ShortName>Accounts Payable and Accrued Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/AccountsPayableandAccruedLiabilities</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>230823014 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/CommitmentsandContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/CommitmentsandContingencies</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>230873015 - Disclosure - Subsequent Events (Unaudited) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SubsequentEventsUnauditedTables</Role>
      <ShortName>Subsequent Events (Unaudited) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/SubsequentEventsUnaudited</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>230903016 - Disclosure - Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedTables</Role>
      <ShortName>Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnaudited</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>230983017 - Disclosure - Supplemental Quarterly Financial Information (Unaudited) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SupplementalQuarterlyFinancialInformationUnauditedTables</Role>
      <ShortName>Supplemental Quarterly Financial Information (Unaudited) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.callon.com/role/SupplementalQuarterlyFinancialInformationUnaudited</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>240054001 - Disclosure - Summary of Significant Accounting Policies (Major Customers) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SummaryofSignificantAccountingPoliciesMajorCustomersDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Major Customers) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>240064002 - Disclosure - Summary of Significant Accounting Policies (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>240074003 - Disclosure - Summary of Significant Accounting Policies (Supplemental Cash Flow Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SummaryofSignificantAccountingPoliciesSupplementalCashFlowInformationDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Supplemental Cash Flow Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>240094004 - Disclosure - Revenue Recognition (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/RevenueRecognitionDetails</Role>
      <ShortName>Revenue Recognition (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/RevenueRecognition</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>240124005 - Disclosure - Acquisitions and Divestitures (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AcquisitionsandDivestituresNarrativeDetails</Role>
      <ShortName>Acquisitions and Divestitures (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/AcquisitionsandDivestituresTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>240134006 - Disclosure - Acquisitions and Divestitures (Assets Acquired and Liabilities Assumed) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AcquisitionsandDivestituresAssetsAcquiredandLiabilitiesAssumedDetails</Role>
      <ShortName>Acquisitions and Divestitures (Assets Acquired and Liabilities Assumed) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/AcquisitionsandDivestituresTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>240144007 - Disclosure - Acquisitions and Divestitures (Unaudited Pro Forma Financial Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AcquisitionsandDivestituresUnauditedProFormaFinancialInformationDetails</Role>
      <ShortName>Acquisitions and Divestitures (Unaudited Pro Forma Financial Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/AcquisitionsandDivestituresTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>240154008 - Disclosure - Acquisitions and Divestitures (Fair Value of Net Assets Acquired ) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AcquisitionsandDivestituresFairValueofNetAssetsAcquiredDetails</Role>
      <ShortName>Acquisitions and Divestitures (Fair Value of Net Assets Acquired ) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/AcquisitionsandDivestituresTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>240184009 - Disclosure - Property and Equipment, Net (Schedule of Property and Equipment) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/PropertyandEquipmentNetScheduleofPropertyandEquipmentDetails</Role>
      <ShortName>Property and Equipment, Net (Schedule of Property and Equipment) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/PropertyandEquipmentNetTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>240194010 - Disclosure - Property and Equipment, Net (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/PropertyandEquipmentNetNarrativeDetails</Role>
      <ShortName>Property and Equipment, Net (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/PropertyandEquipmentNetTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>240204011 - Disclosure - Property and Equipment, Net (Summary of Average Realized Price of Crude Oil) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/PropertyandEquipmentNetSummaryofAverageRealizedPriceofCrudeOilDetails</Role>
      <ShortName>Property and Equipment, Net (Summary of Average Realized Price of Crude Oil) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/PropertyandEquipmentNetTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>240214012 - Disclosure - Property and Equipment, Net (Unevaluated Property Costs not Subject to Amortization) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/PropertyandEquipmentNetUnevaluatedPropertyCostsnotSubjecttoAmortizationDetails</Role>
      <ShortName>Property and Equipment, Net (Unevaluated Property Costs not Subject to Amortization) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/PropertyandEquipmentNetTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>240244013 - Disclosure - Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/EarningsPerShareDetails</Role>
      <ShortName>Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/EarningsPerShareTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>240274014 - Disclosure - Borrowings (Schedule of Borrowings) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/BorrowingsScheduleofBorrowingsDetails</Role>
      <ShortName>Borrowings (Schedule of Borrowings) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/BorrowingsTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>240284015 - Disclosure - Borrowings (Senior Secured Revolving Credit Facility) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/BorrowingsSeniorSecuredRevolvingCreditFacilityDetails</Role>
      <ShortName>Borrowings (Senior Secured Revolving Credit Facility) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/BorrowingsTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>240294016 - Disclosure - Borrowings (Second Lien Notes and Warrants) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.callon.com/role/BorrowingsSecondLienNotesandWarrantsDetails</Role>
      <ShortName>Borrowings (Second Lien Notes and Warrants) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/BorrowingsTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>240304017 - Disclosure - Borrowings (Fair Value of Warrants) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/BorrowingsFairValueofWarrantsDetails</Role>
      <ShortName>Borrowings (Fair Value of Warrants) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/BorrowingsTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>240314018 - Disclosure - Borrowings (Senior Unsecured Notes Exchange) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.callon.com/role/BorrowingsSeniorUnsecuredNotesExchangeDetails</Role>
      <ShortName>Borrowings (Senior Unsecured Notes Exchange) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/BorrowingsTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>240324019 - Disclosure - Borrowings (Senior Unsecured Notes) (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.callon.com/role/BorrowingsSeniorUnsecuredNotesDetails</Role>
      <ShortName>Borrowings (Senior Unsecured Notes) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/BorrowingsTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>240334020 - Disclosure - Borrowings (Restricted Covenants) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/BorrowingsRestrictedCovenantsDetails</Role>
      <ShortName>Borrowings (Restricted Covenants) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/BorrowingsTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>240364021 - Disclosure - Derivative Instruments and Hedging Activities (Contingent Consideration Arrangements) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesContingentConsiderationArrangementsDetails</Role>
      <ShortName>Derivative Instruments and Hedging Activities (Contingent Consideration Arrangements) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>240374022 - Disclosure - Derivative Instruments and Hedging Activities (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesNarrativeDetails</Role>
      <ShortName>Derivative Instruments and Hedging Activities (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>240384023 - Disclosure - Derivative Instruments and Hedging Activities (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesScheduleofDerivativeInstrumentsinStatementofFinancialPositionFairValueDetails</Role>
      <ShortName>Derivative Instruments and Hedging Activities (Schedule of Derivative Instruments in Statement of Financial Position, Fair Value) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>240394024 - Disclosure - Derivative Instruments and Hedging Activities (Schedule of Gain or Loss on Derivative Contracts) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesScheduleofGainorLossonDerivativeContractsDetails</Role>
      <ShortName>Derivative Instruments and Hedging Activities (Schedule of Gain or Loss on Derivative Contracts) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>240404025 - Disclosure - Derivative Instruments and Hedging Activities (Schedule of Cash Paid (Received)) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesScheduleofCashPaidReceivedDetails</Role>
      <ShortName>Derivative Instruments and Hedging Activities (Schedule of Cash Paid (Received)) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>240414026 - Disclosure - Derivative Instruments and Hedging Activities (Schedule of Outstanding Oil and Natural Gas Derivative Contracts) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesScheduleofOutstandingOilandNaturalGasDerivativeContractsDetails</Role>
      <ShortName>Derivative Instruments and Hedging Activities (Schedule of Outstanding Oil and Natural Gas Derivative Contracts) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/DerivativeInstrumentsandHedgingActivitiesTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>240444027 - Disclosure - Fair Value Measurements (Summary of Financial Instruments at Carrying and Fair Value) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/FairValueMeasurementsSummaryofFinancialInstrumentsatCarryingandFairValueDetails</Role>
      <ShortName>Fair Value Measurements (Summary of Financial Instruments at Carrying and Fair Value) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>240454028 - Disclosure - Fair Value Measurements (Fair Value of Assets and Liabilities Measured on Recurring Basis) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/FairValueMeasurementsFairValueofAssetsandLiabilitiesMeasuredonRecurringBasisDetails</Role>
      <ShortName>Fair Value Measurements (Fair Value of Assets and Liabilities Measured on Recurring Basis) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>240464029 - Disclosure - Fair Value Measurements (Fair Value of Warrant Liabilities Measured on Recurring Basis) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/FairValueMeasurementsFairValueofWarrantLiabilitiesMeasuredonRecurringBasisDetails</Role>
      <ShortName>Fair Value Measurements (Fair Value of Warrant Liabilities Measured on Recurring Basis) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>240494030 - Disclosure - Share-Based Compensation (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ShareBasedCompensationNarrativeDetails</Role>
      <ShortName>Share-Based Compensation (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/ShareBasedCompensationTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>240504031 - Disclosure - Share-Based Compensation (RSU Equity Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ShareBasedCompensationRSUEquityAwardsDetails</Role>
      <ShortName>Share-Based Compensation (RSU Equity Awards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/ShareBasedCompensationTables</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>240514032 - Disclosure - Share-Based Compensation (Shares Vested and Did Not Vest) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ShareBasedCompensationSharesVestedandDidNotVestDetails</Role>
      <ShortName>Share-Based Compensation (Shares Vested and Did Not Vest) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/ShareBasedCompensationTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>240524033 - Disclosure - Share-Based Compensation (Fair Value Inputs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ShareBasedCompensationFairValueInputsDetails</Role>
      <ShortName>Share-Based Compensation (Fair Value Inputs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/ShareBasedCompensationTables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>240534034 - Disclosure - Share-Based Compensation (Cash-Settled RSU Awards) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ShareBasedCompensationCashSettledRSUAwardsDetails</Role>
      <ShortName>Share-Based Compensation (Cash-Settled RSU Awards) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/ShareBasedCompensationTables</ParentRole>
      <Position>81</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>240544035 - Disclosure - Share-Based Compensation (Summary of Liability for Cash-Settled RSU Awards) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ShareBasedCompensationSummaryofLiabilityforCashSettledRSUAwardsDetails</Role>
      <ShortName>Share-Based Compensation (Summary of Liability for Cash-Settled RSU Awards) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/ShareBasedCompensationTables</ParentRole>
      <Position>82</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>240554036 - Disclosure - Share-Based Compensation (Schedule of Cash-Settleable RSUs Outstanding) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ShareBasedCompensationScheduleofCashSettleableRSUsOutstandingDetails</Role>
      <ShortName>Share-Based Compensation (Schedule of Cash-Settleable RSUs Outstanding) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/ShareBasedCompensationTables</ParentRole>
      <Position>83</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>240564037 - Disclosure - Share-Based Compensation (Cash Settled SARs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ShareBasedCompensationCashSettledSARsDetails</Role>
      <ShortName>Share-Based Compensation (Cash Settled SARs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/ShareBasedCompensationTables</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>240574038 - Disclosure - Share-Based Compensation (Schedule of Share-based Compensation Expense) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/ShareBasedCompensationScheduleofSharebasedCompensationExpenseDetails</Role>
      <ShortName>Share-Based Compensation (Schedule of Share-based Compensation Expense) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/ShareBasedCompensationTables</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>240594039 - Disclosure - Stockholders' Equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/StockholdersEquityDetails</Role>
      <ShortName>Stockholders' Equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/StockholdersEquity</ParentRole>
      <Position>86</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>240624040 - Disclosure - Income Taxes (Expenses) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/IncomeTaxesExpensesDetails</Role>
      <ShortName>Income Taxes (Expenses) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/IncomeTaxesTables</ParentRole>
      <Position>87</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>240634041 - Disclosure - Income Taxes (Reconciliation) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/IncomeTaxesReconciliationDetails</Role>
      <ShortName>Income Taxes (Reconciliation) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/IncomeTaxesTables</ParentRole>
      <Position>88</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>240644042 - Disclosure - Income Taxes (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/IncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/IncomeTaxesTables</ParentRole>
      <Position>89</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>240654043 - Disclosure - Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails</Role>
      <ShortName>Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/IncomeTaxesTables</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>240684044 - Disclosure - Leases (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/LeasesNarrativeDetails</Role>
      <ShortName>Leases (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/LeasesTables</ParentRole>
      <Position>91</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>240694045 - Disclosure - Leases (Cost) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/LeasesCostDetails</Role>
      <ShortName>Leases (Cost) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/LeasesTables</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>240704046 - Disclosure - Leases (Lease Term and Discount Rate) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/LeasesLeaseTermandDiscountRateDetails</Role>
      <ShortName>Leases (Lease Term and Discount Rate) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/LeasesTables</ParentRole>
      <Position>93</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>240714047 - Disclosure - Leases (Maturities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/LeasesMaturitiesDetails</Role>
      <ShortName>Leases (Maturities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/LeasesTables</ParentRole>
      <Position>94</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>240744048 - Disclosure - Asset Retirement Obligations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AssetRetirementObligationsDetails</Role>
      <ShortName>Asset Retirement Obligations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/AssetRetirementObligationsTables</ParentRole>
      <Position>95</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>240774049 - Disclosure - Accounts Receivable, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AccountsReceivableNetDetails</Role>
      <ShortName>Accounts Receivable, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/AccountsReceivableNetTables</ParentRole>
      <Position>96</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>240804050 - Disclosure - Accounts Payable and Accrued Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/AccountsPayableandAccruedLiabilitiesDetails</Role>
      <ShortName>Accounts Payable and Accrued Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/AccountsPayableandAccruedLiabilitiesTables</ParentRole>
      <Position>97</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>240834051 - Disclosure - Commitments and Contingencies (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/CommitmentsandContingenciesNarrativeDetails</Role>
      <ShortName>Commitments and Contingencies (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/CommitmentsandContingenciesTables</ParentRole>
      <Position>98</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>240844052 - Disclosure - Commitments and Contingencies (Contractual Obligations) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/CommitmentsandContingenciesContractualObligationsDetails</Role>
      <ShortName>Commitments and Contingencies (Contractual Obligations) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/CommitmentsandContingenciesTables</ParentRole>
      <Position>99</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>240854053 - Disclosure - Commitments and Contingencies (Other Commitments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/CommitmentsandContingenciesOtherCommitmentsDetails</Role>
      <ShortName>Commitments and Contingencies (Other Commitments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/CommitmentsandContingenciesTables</ParentRole>
      <Position>100</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>240884054 - Disclosure - Subsequent Events (Unaudited) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SubsequentEventsUnauditedDetails</Role>
      <ShortName>Subsequent Events (Unaudited) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/SubsequentEventsUnauditedTables</ParentRole>
      <Position>101</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>240914055 - Disclosure - Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Proved Developed and Undeveloped Oil and Gas Reserve Quantities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedProvedDevelopedandUndevelopedOilandGasReserveQuantitiesDetails</Role>
      <ShortName>Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Proved Developed and Undeveloped Oil and Gas Reserve Quantities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedTables</ParentRole>
      <Position>102</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>240924056 - Disclosure - Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedNarrativeDetails</Role>
      <ShortName>Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedTables</ParentRole>
      <Position>103</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>240934057 - Disclosure - Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Capitalized Costs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedCapitalizedCostsDetails</Role>
      <ShortName>Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Capitalized Costs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedTables</ParentRole>
      <Position>104</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>240944058 - Disclosure - Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Costs Incurred) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedCostsIncurredDetails</Role>
      <ShortName>Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Costs Incurred) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedTables</ParentRole>
      <Position>105</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>240954059 - Disclosure - Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Oil and Gas Net Production, Average Sales Price and Average Production Costs Disclosure) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedOilandGasNetProductionAverageSalesPriceandAverageProductionCostsDisclosureDetails</Role>
      <ShortName>Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Oil and Gas Net Production, Average Sales Price and Average Production Costs Disclosure) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedTables</ParentRole>
      <Position>106</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>240964060 - Disclosure - Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedStandardizedMeasureofDiscountedFutureCashFlowsRelatingtoProvedReservesDisclosureDetails</Role>
      <ShortName>Supplemental Information on Oil and Natural Gas Properties (Unaudited) (Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/SupplementalInformationonOilandNaturalGasPropertiesUnauditedTables</ParentRole>
      <Position>107</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>240994061 - Disclosure - Supplemental Quarterly Financial Information (Unaudited) (Summary) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SupplementalQuarterlyFinancialInformationUnauditedSummaryDetails</Role>
      <ShortName>Supplemental Quarterly Financial Information (Unaudited) (Summary) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/SupplementalQuarterlyFinancialInformationUnauditedTables</ParentRole>
      <Position>108</Position>
    </Report>
    <Report instance="cpe-20201231.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>241004062 - Disclosure - Supplemental Quarterly Financial Information (Unaudited) (Additional Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.callon.com/role/SupplementalQuarterlyFinancialInformationUnauditedAdditionalInformationDetails</Role>
      <ShortName>Supplemental Quarterly Financial Information (Unaudited) (Additional Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.callon.com/role/SupplementalQuarterlyFinancialInformationUnauditedTables</ParentRole>
      <Position>109</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-K" original="cpe-20201231.htm">cpe-20201231.htm</File>
    <File>cpe-20201231.xsd</File>
    <File>cpe-20201231_cal.xml</File>
    <File>cpe-20201231_def.xml</File>
    <File>cpe-20201231_lab.xml</File>
    <File>cpe-20201231_pre.xml</File>
    <File>ex1028exchangeagreement.htm</File>
    <File>ex1029deferredcompensation.htm</File>
    <File>ex2114q20subsidiaries.htm</File>
    <File>ex2214q20subsidiaryguarant.htm</File>
    <File>ex2314q20gtconsent.htm</File>
    <File>ex2324q20demacconsent.htm</File>
    <File>ex3114q20ceocertification.htm</File>
    <File>ex3124q20cfocertification.htm</File>
    <File>ex3214q20section1350certif.htm</File>
    <File>ex42descriptionofcommonsto.htm</File>
    <File>ex9914q20dmreservereport.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>cpe-20201231_g1.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/us-gaap/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2020-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
