<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.22.2.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>481</ContextCount>
  <ElementCount>281</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>82</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/DocumentandEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0000003 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>0000004 - Statement - Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/ConsolidatedStatementsofOperations</Role>
      <ShortName>Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>0000005 - Statement - Consolidated Statements of Comprehensive Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/ConsolidatedStatementsofComprehensiveIncomeLoss</Role>
      <ShortName>Consolidated Statements of Comprehensive Income (Loss)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>0000006 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/ConsolidatedStatementsofCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>0000007 - Statement - Consolidated Statements of Changes in Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/ConsolidatedStatementsofChangesinEquity</Role>
      <ShortName>Consolidated Statements of Changes in Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>0000009 - Disclosure - Description of Business and Basis of Presentation (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/DescriptionofBusinessandBasisofPresentationNotes</Role>
      <ShortName>Description of Business and Basis of Presentation (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>0000010 - Disclosure - Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/AccountingPolicies</Role>
      <ShortName>Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>0000011 - Disclosure - Recent Accounting Pronouncements (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/RecentAccountingPronouncementsNotes</Role>
      <ShortName>Recent Accounting Pronouncements (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>0000013 - Disclosure - Revenue Recognition (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/RevenueRecognitionNotes</Role>
      <ShortName>Revenue Recognition (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>0000015 - Disclosure - Agreements and Transactions with Affiliates (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/AgreementsandTransactionswithAffiliatesNotes</Role>
      <ShortName>Agreements and Transactions with Affiliates (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>0000016 - Disclosure - Inventories (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/InventoriesNotes</Role>
      <ShortName>Inventories (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>0000017 - Disclosure - Business Combinations and Asset Acquisitions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/BusinessCombinationsandAssetAcquisitions</Role>
      <ShortName>Business Combinations and Asset Acquisitions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>0000018 - Disclosure - Property, Plant and Equipment (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/PropertyPlantandEquipmentNotes</Role>
      <ShortName>Property, Plant and Equipment (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>0000020 - Disclosure - Investments in Unconsolidated Affiliates (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/InvestmentsinUnconsolidatedAffiliatesNotes</Role>
      <ShortName>Investments in Unconsolidated Affiliates (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>0000021 - Disclosure - Fair Value Measurement (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/FairValueMeasurementNotes</Role>
      <ShortName>Fair Value Measurement (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>0000023 - Disclosure - Debt (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/DebtNotes</Role>
      <ShortName>Debt (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>0000024 - Disclosure - Risk Management and Hedging Activities (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/RiskManagementandHedgingActivitiesNotes</Role>
      <ShortName>Risk Management and Hedging Activities (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>0000025 - Disclosure - Partnership Equity and Distributions (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/PartnershipEquityandDistributionsNotes</Role>
      <ShortName>Partnership Equity and Distributions (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>0000028 - Disclosure - Net Income or Loss per Limited Partner Unit (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/NetIncomeorLossperLimitedPartnerUnitNotes</Role>
      <ShortName>Net Income or Loss per Limited Partner Unit (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>0000030 - Disclosure - Commitments and Contingent Liabilities (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/CommitmentsandContingentLiabilitiesNotes</Role>
      <ShortName>Commitments and Contingent Liabilities (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>0000032 - Disclosure - Business Segments (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/BusinessSegmentsNotes</Role>
      <ShortName>Business Segments (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>0000033 - Disclosure - Supplemental Cash Flow Information (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/SupplementalCashFlowInformationNotes</Role>
      <ShortName>Supplemental Cash Flow Information (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>0000036 - Disclosure - Subsequent Events (Notes)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.dcpmidstream.com/role/SubsequentEventsNotes</Role>
      <ShortName>Subsequent Events (Notes)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>0000037 - Disclosure - Description of Business and Basis of Presentation (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/DescriptionofBusinessandBasisofPresentationPolicies</Role>
      <ShortName>Description of Business and Basis of Presentation (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/AccountingPolicies</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>0000040 - Disclosure - Revenue Recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/RevenueRecognitionTables</Role>
      <ShortName>Revenue Recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/RevenueRecognitionNotes</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>0000042 - Disclosure - Agreements and Transactions with Affiliates (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/AgreementsandTransactionswithAffiliatesTables</Role>
      <ShortName>Agreements and Transactions with Affiliates (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/AgreementsandTransactionswithAffiliatesNotes</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>0000043 - Disclosure - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/InventoriesTables</Role>
      <ShortName>Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/InventoriesNotes</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>0000044 - Disclosure - Business Combinations and Asset Acquisitions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/BusinessCombinationsandAssetAcquisitionsTables</Role>
      <ShortName>Business Combinations and Asset Acquisitions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/BusinessCombinationsandAssetAcquisitions</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>0000045 - Disclosure - Property, Plant and Equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/PropertyPlantandEquipmentTables</Role>
      <ShortName>Property, Plant and Equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/PropertyPlantandEquipmentNotes</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>0000047 - Disclosure - Investments in Unconsolidated Affiliates (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/InvestmentsinUnconsolidatedAffiliatesTables</Role>
      <ShortName>Investments in Unconsolidated Affiliates (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/InvestmentsinUnconsolidatedAffiliatesNotes</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>0000048 - Disclosure - Fair Value Measurement (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/FairValueMeasurementTables</Role>
      <ShortName>Fair Value Measurement (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/FairValueMeasurementNotes</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>0000050 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/DebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/DebtNotes</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>0000051 - Disclosure - Risk Management and Hedging Activities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/RiskManagementandHedgingActivitiesTables</Role>
      <ShortName>Risk Management and Hedging Activities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/RiskManagementandHedgingActivitiesNotes</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>0000052 - Disclosure - Partnership Equity and Distributions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/PartnershipEquityandDistributionsTables</Role>
      <ShortName>Partnership Equity and Distributions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/PartnershipEquityandDistributionsNotes</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>0000055 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/EarningsPerShareTables</Role>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>0000058 - Disclosure - Business Segments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/BusinessSegmentsTables</Role>
      <ShortName>Business Segments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/BusinessSegmentsNotes</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>0000059 - Disclosure - Statement of Cash Flows, Supplemental Disclosures (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/StatementofCashFlowsSupplementalDisclosuresTables</Role>
      <ShortName>Statement of Cash Flows, Supplemental Disclosures (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>0000062 - Disclosure - Description of Business and Basis of Presentation - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/DescriptionofBusinessandBasisofPresentationAdditionalInformationDetail</Role>
      <ShortName>Description of Business and Basis of Presentation - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>0000065 - Disclosure - Revenue Recognition (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/RevenueRecognitionDetails</Role>
      <ShortName>Revenue Recognition (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/RevenueRecognitionTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>0000067 - Disclosure - Agreements and Transactions with Affiliates - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/AgreementsandTransactionswithAffiliatesAdditionalInformationDetail</Role>
      <ShortName>Agreements and Transactions with Affiliates - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>0000068 - Disclosure - Agreements and Transactions with Affiliates - Transactions with Affiliates (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/AgreementsandTransactionswithAffiliatesTransactionswithAffiliatesDetail</Role>
      <ShortName>Agreements and Transactions with Affiliates - Transactions with Affiliates (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>0000069 - Disclosure - Agreements and Transactions with Affiliates - Balances with Affiliates (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/AgreementsandTransactionswithAffiliatesBalanceswithAffiliatesDetail</Role>
      <ShortName>Agreements and Transactions with Affiliates - Balances with Affiliates (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>0000070 - Disclosure - Inventories - Schedule of Inventories (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/InventoriesScheduleofInventoriesDetail</Role>
      <ShortName>Inventories - Schedule of Inventories (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>0000071 - Disclosure - Inventories - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/InventoriesAdditionalInformationDetail</Role>
      <ShortName>Inventories - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>0000072 - Disclosure - Business Combinations and Asset Acquisitions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/BusinessCombinationsandAssetAcquisitionsDetails</Role>
      <ShortName>Business Combinations and Asset Acquisitions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/BusinessCombinationsandAssetAcquisitionsTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>0000073 - Disclosure - Property, Plant and Equipment - Classification of Property, Plant and Equipment (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/PropertyPlantandEquipmentClassificationofPropertyPlantandEquipmentDetail</Role>
      <ShortName>Property, Plant and Equipment - Classification of Property, Plant and Equipment (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>0000074 - Disclosure - Property, Plant and Equipment - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/PropertyPlantandEquipmentAdditionalInformationDetail</Role>
      <ShortName>Property, Plant and Equipment - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>0000077 - Disclosure - Investments In Unconsolidated Affiliates - Investments In Unconsolidated Affiliates (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/InvestmentsInUnconsolidatedAffiliatesInvestmentsInUnconsolidatedAffiliatesDetail</Role>
      <ShortName>Investments In Unconsolidated Affiliates - Investments In Unconsolidated Affiliates (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>0000078 - Disclosure - Investments in Unconsolidated Affiliates - Earnings from Investments in Unconsolidated Affiliates (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/InvestmentsinUnconsolidatedAffiliatesEarningsfromInvestmentsinUnconsolidatedAffiliatesDetail</Role>
      <ShortName>Investments in Unconsolidated Affiliates - Earnings from Investments in Unconsolidated Affiliates (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>0000079 - Disclosure - Investments in Unconsolidated Affiliates - Equity Method Investment Summarized Financial Information, Statement of Operations (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/InvestmentsinUnconsolidatedAffiliatesEquityMethodInvestmentSummarizedFinancialInformationStatementofOperationsDetail</Role>
      <ShortName>Investments in Unconsolidated Affiliates - Equity Method Investment Summarized Financial Information, Statement of Operations (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>0000080 - Disclosure - Fair Value Measurement - Impairment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/FairValueMeasurementImpairmentDetails</Role>
      <ShortName>Fair Value Measurement - Impairment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>0000081 - Disclosure - Fair Value Measurement - Financial Instruments Carried at Fair Value (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/FairValueMeasurementFinancialInstrumentsCarriedatFairValueDetail</Role>
      <ShortName>Fair Value Measurement - Financial Instruments Carried at Fair Value (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>0000082 - Disclosure - Fair Value Measurement - Condensed Consolidated Balance Sheets for Derivative Financial Instruments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/FairValueMeasurementCondensedConsolidatedBalanceSheetsforDerivativeFinancialInstrumentsDetail</Role>
      <ShortName>Fair Value Measurement - Condensed Consolidated Balance Sheets for Derivative Financial Instruments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>0000083 - Disclosure - Schedule of Valuation Processes (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/ScheduleofValuationProcessesDetail</Role>
      <ShortName>Schedule of Valuation Processes (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>0000084 - Disclosure - Carrying Value and Fair Value of Debt (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/CarryingValueandFairValueofDebtDetail</Role>
      <ShortName>Carrying Value and Fair Value of Debt (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>0000090 - Disclosure - Debt - Schedule of Debt (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/DebtScheduleofDebtDetail</Role>
      <ShortName>Debt - Schedule of Debt (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>0000091 - Disclosure - Debt - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/DebtAdditionalInformationDetail</Role>
      <ShortName>Debt - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>0000092 - Disclosure - Debt - Future Maturities of Long-Term Debt (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/DebtFutureMaturitiesofLongTermDebtDetail</Role>
      <ShortName>Debt - Future Maturities of Long-Term Debt (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>0000093 - Disclosure - Risk Management and Hedging Activities - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/RiskManagementandHedgingActivitiesAdditionalInformationDetail</Role>
      <ShortName>Risk Management and Hedging Activities - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>0000094 - Disclosure - Risk Management and Hedging Activities - Summary of Gross and Net Amounts of Derivative Instruments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/RiskManagementandHedgingActivitiesSummaryofGrossandNetAmountsofDerivativeInstrumentsDetail</Role>
      <ShortName>Risk Management and Hedging Activities - Summary of Gross and Net Amounts of Derivative Instruments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>0000095 - Disclosure - Risk Management and Hedging Activities - Schedule of Designated and Non-Designated Derivative Instruments in Statement of Financial Position, Fair Value (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/RiskManagementandHedgingActivitiesScheduleofDesignatedandNonDesignatedDerivativeInstrumentsinStatementofFinancialPositionFairValueDetail</Role>
      <ShortName>Risk Management and Hedging Activities - Schedule of Designated and Non-Designated Derivative Instruments in Statement of Financial Position, Fair Value (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>0000096 - Disclosure - Risk Management and Hedging Activities - Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/RiskManagementandHedgingActivitiesScheduleofCashFlowHedgesIncludedinAccumulatedOtherComprehensiveIncomeLossDetail</Role>
      <ShortName>Risk Management and Hedging Activities - Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>0000097 - Disclosure - Risk Management and Hedging Activities - Schedule of Changes in Derivative Instruments not Designated as Hedging Instruments (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/RiskManagementandHedgingActivitiesScheduleofChangesinDerivativeInstrumentsnotDesignatedasHedgingInstrumentsDetail</Role>
      <ShortName>Risk Management and Hedging Activities - Schedule of Changes in Derivative Instruments not Designated as Hedging Instruments (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>0000098 - Disclosure - Risk Management and Hedging Activities - Schedule of Net Long or Short Positions Expected to be Realized (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/RiskManagementandHedgingActivitiesScheduleofNetLongorShortPositionsExpectedtobeRealizedDetail</Role>
      <ShortName>Risk Management and Hedging Activities - Schedule of Net Long or Short Positions Expected to be Realized (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>0000099 - Disclosure - Partnership Equity and Distributions - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/PartnershipEquityandDistributionsAdditionalInformationDetail</Role>
      <ShortName>Partnership Equity and Distributions - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>0000100 - Disclosure - Partnership Equity and Distributions - Cash Distribution (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/PartnershipEquityandDistributionsCashDistributionDetail</Role>
      <ShortName>Partnership Equity and Distributions - Cash Distribution (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>0000105 - Disclosure - Net Income or Loss per Limited Partner Unit Additional Detail (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/NetIncomeorLossperLimitedPartnerUnitAdditionalDetailDetails</Role>
      <ShortName>Net Income or Loss per Limited Partner Unit Additional Detail (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>0000106 - Disclosure - Commitments and Contingent Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/CommitmentsandContingentLiabilitiesDetails</Role>
      <ShortName>Commitments and Contingent Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/CommitmentsandContingentLiabilitiesNotes</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>0000108 - Disclosure - Business Segments - Segment Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/BusinessSegmentsSegmentInformationDetail</Role>
      <ShortName>Business Segments - Segment Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>0000109 - Disclosure - Business Segments - Segment Assets (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/BusinessSegmentsSegmentAssetsDetail</Role>
      <ShortName>Business Segments - Segment Assets (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>0000110 - Disclosure - Statement of Cash Flows, Supplemental Disclosures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/StatementofCashFlowsSupplementalDisclosuresDetails</Role>
      <ShortName>Statement of Cash Flows, Supplemental Disclosures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.dcpmidstream.com/role/StatementofCashFlowsSupplementalDisclosuresTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="dpm-20220930.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>0000111 - Disclosure - Subsequent Events - Additional Information (Detail)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.dcpmidstream.com/role/SubsequentEventsAdditionalInformationDetail</Role>
      <ShortName>Subsequent Events - Additional Information (Detail)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Warning">[ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 3 fact(s) appearing in ix:hidden were eligible for transformation: us-gaap:InterestCostsCapitalized, us-gaap:InventoryWriteDown -  dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact dpm:PreferredLimitedPartnershipUnitDistributionAmountDeclared with a value of 36.875 is dimensionally qualified with the us-gaap:SubsequentEventTypeAxis and the unallowable member dpm:SeriesAPreferredLimitedPartnersMember. Extension members should not be used with this axis.  The properties of this dpm:PreferredLimitedPartnershipUnitDistributionAmountDeclared fact are Context: i49ab05efaa0e46aaa111205a2b462350_D20211012-20211012, Unit: usdPerShare, Rule Element Id: 74. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact dpm:PreferredLimitedPartnershipDistributionDistributionDate with a value of 2022-12-15 is dimensionally qualified with the us-gaap:SubsequentEventTypeAxis and the unallowable member dpm:SeriesAPreferredLimitedPartnersMember. Extension members should not be used with this axis.  The properties of this dpm:PreferredLimitedPartnershipDistributionDistributionDate fact are Context: i49ab05efaa0e46aaa111205a2b462350_D20211012-20211012, Unit: (none), Rule Element Id: 74. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax with a value of -1181000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax fact are Context: ic8a86357d2b34685949eb2b78db475a3_D20220701-20220930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax with a value of -1673000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax fact are Context: ie501295393b94fc9b167809307061909_D20210101-20210930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax with a value of -2228000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax fact are Context: i3598f294f81f4dc5896e12a132f5f136_D20210101-20210930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax with a value of -1000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax fact are Context: i9c4911ee13d9493f9260b70d3c3e95a8_D20210101-20210930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:DerivativeGainLossOnDerivativeNet with a value of 0 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:DerivativeGainLossOnDerivativeNet fact are Context: i85ec19208d304d8b832c2064276b8b12_D20210101-20210930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax with a value of -695000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax fact are Context: if129ae7dd0db433bb1445d72a2deab41_D20210701-20210930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:Revenues with a value of -3902000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:Revenues fact are Context: i85ec19208d304d8b832c2064276b8b12_D20210101-20210930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax with a value of -966000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax fact are Context: ic525a5feb5cc465fbce27437dfc2cb08_D20210701-20210930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax with a value of -1000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax fact are Context: i1fb9036baf95473cbcf9e8c717dab45a_D20210701-20210930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax with a value of -3572000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax fact are Context: i8908281b866a4104b79546a78af7586a_D20220101-20220930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax with a value of 0 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax fact are Context: ic54867772f9941bea45b18be6db1cf0b_D20220101-20220930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:DerivativeGainLossOnDerivativeNet with a value of 0 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:DerivativeGainLossOnDerivativeNet fact are Context: i1fb9036baf95473cbcf9e8c717dab45a_D20210701-20210930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:Revenues with a value of -1662000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:Revenues fact are Context: i1fb9036baf95473cbcf9e8c717dab45a_D20210701-20210930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:DerivativeGainLossOnDerivativeNet with a value of 0 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:DerivativeGainLossOnDerivativeNet fact are Context: i46f7103124184ee49d2a99b41c77dabe_D20220701-20220930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:Revenues with a value of -2570000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:Revenues fact are Context: i46f7103124184ee49d2a99b41c77dabe_D20220701-20220930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax with a value of -1389000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax fact are Context: i955b88c5e9bc4a61bdb23ef0a281ba4e_D20220701-20220930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax with a value of -3379000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax fact are Context: i6e21fc6635df4f69943eec8245b25a24_D20220101-20220930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:DerivativeGainLossOnDerivativeNet with a value of 0 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:DerivativeGainLossOnDerivativeNet fact are Context: iddbbd2a398ec42f3b40a9d0c403df644_D20220101-20220930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0001-Axis-With-Inappropriate-Members] The fact us-gaap:Revenues with a value of -6951000000 is dimensionally qualified with the us-gaap:StatementBusinessSegmentsAxis and the unallowable member us-gaap:IntersegmentEliminationMember. Base taxonomy member is not allowed by rule.  The properties of this us-gaap:Revenues fact are Context: iddbbd2a398ec42f3b40a9d0c403df644_D20220101-20220930, Unit: usd, Rule Element Id: 81. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-04-19 used for DistributionMadeToLimitedPartnerDeclarationDate with a value of 2022-10-13 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this DistributionMadeToLimitedPartnerDeclarationDate fact are Context: i68930d56e74b4e21b81cdab54000318c_D20220419-20220419, Unit: (none), Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-04-19 used for DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit with a value of 0.430000 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit fact are Context: i9670296827f64d19ae0dc1c90e50be99_D20220419-20220419, Unit: usdPerShare, Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-04-19 used for PreferredLimitedPartnershipUnitDistributionAmountDeclared with a value of 0.492200 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this PreferredLimitedPartnershipUnitDistributionAmountDeclared fact are Context: i68930d56e74b4e21b81cdab54000318c_D20220419-20220419, Unit: usdPerShare, Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-07-15 used for PreferredLimitedPartnershipDistributionDistributionDate with a value of 2023-01-17 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this PreferredLimitedPartnershipDistributionDistributionDate fact are Context: ic80ae6b616c54ff6b9f96219808f09a2_D20220715-20220715, Unit: (none), Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2021-10-12 used for PreferredLimitedPartnershipUnitDistributionAmountDeclared with a value of 36.875000 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this PreferredLimitedPartnershipUnitDistributionAmountDeclared fact are Context: i49ab05efaa0e46aaa111205a2b462350_D20211012-20211012, Unit: usdPerShare, Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-07-01 used for PreferredLimitedPartnerDistributionRecordDate with a value of 2023-01-03 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this PreferredLimitedPartnerDistributionRecordDate fact are Context: i3c8536b8cfcc47eaa8e6795bbf0d5c0b_D20220701-20220701, Unit: (none), Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-04-19 used for PreferredLimitedPartnershipUnitDistributionAmountDeclared with a value of 0.496900 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this PreferredLimitedPartnershipUnitDistributionAmountDeclared fact are Context: i078afef2151e45ea838767cff7662f44_D20220419-20220419, Unit: usdPerShare, Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-04-19 used for PreferredLimitedPartnershipUnitDistributionAmountDeclared with a value of 0.496900 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this PreferredLimitedPartnershipUnitDistributionAmountDeclared fact are Context: i078afef2151e45ea838767cff7662f44_D20220419-20220419, Unit: usdPerShare, Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2021-10-12 used for PreferredLimitedPartnershipDistributionDistributionDate with a value of 2022-12-15 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this PreferredLimitedPartnershipDistributionDistributionDate fact are Context: i49ab05efaa0e46aaa111205a2b462350_D20211012-20211012, Unit: (none), Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-05-13 used for DistributionMadeToLimitedPartnerDistributionDate with a value of 2022-11-14 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this DistributionMadeToLimitedPartnerDistributionDate fact are Context: iea851a9e521f4bae987f9bc47bed4f29_D20220513-20220513, Unit: (none), Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-06-15 used for PreferredLimitedPartnershipDistributionDistributionDate with a value of 2022-12-15 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this PreferredLimitedPartnershipDistributionDistributionDate fact are Context: i4046c28bcf0d4b56bff590667844a18d_D20220615-20220615, Unit: (none), Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-06-01 used for PreferredLimitedPartnerDistributionRecordDate with a value of 2022-12-01 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this PreferredLimitedPartnerDistributionRecordDate fact are Context: if9bcb49206d044e4ae67325edb0954f7_D20220601-20220601, Unit: (none), Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-04-29 used for DistributionMadeToLimitedPartnerDateOfRecord with a value of 2022-10-28 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this DistributionMadeToLimitedPartnerDateOfRecord fact are Context: ie61ae98a52b64754b2689a4195397932_D20220429-20220429, Unit: (none), Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-06-01 used for PreferredLimitedPartnerDistributionRecordDate with a value of 2022-12-01 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this PreferredLimitedPartnerDistributionRecordDate fact are Context: i24c869b6e09444928c932467584fcf97_D20220601-20220601, Unit: (none), Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-04-19 used for DistributionMadeToLimitedPartnerDeclarationDate with a value of 2022-10-13 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this DistributionMadeToLimitedPartnerDeclarationDate fact are Context: i68930d56e74b4e21b81cdab54000318c_D20220419-20220419, Unit: (none), Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0005-Context-Dates-After-Period-End-Date] The date of 2022-04-19 used for DistributionMadeToLimitedPartnerDeclarationDate with a value of 2022-10-13 and the SubsequentEventTypeAxis is earlier than or the same as the reporting period end date 2022-09-30.  The properties of this DistributionMadeToLimitedPartnerDeclarationDate fact are Context: i68930d56e74b4e21b81cdab54000318c_D20220419-20220419, Unit: (none), Rule Element Id: 48. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0015-Negative-Values] Fact us-gaap:PaymentsToAcquireEquityMethodInvestments has a value of -2000000 which is less than zero. This element should not have a negative value. The preparer should consider if the value is input correctly for this assertion and, after considering the appropriateness of the input, if incorrect, input the amount as a positive (i.e., absolute) value and provide a negated label. The properties of this us-gaap:PaymentsToAcquireEquityMethodInvestments fact are: Context: i5186ec57705f43acb2caa08877342b8e_D20220101-20220930, Unit: usd, Rule Element Id: 2836. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0015-Negative-Values] Fact us-gaap:PaymentsToAcquireEquityMethodInvestments has a value of -4000000 which is less than zero. This element should not have a negative value. The preparer should consider if the value is input correctly for this assertion and, after considering the appropriateness of the input, if incorrect, input the amount as a positive (i.e., absolute) value and provide a negated label. The properties of this us-gaap:PaymentsToAcquireEquityMethodInvestments fact are: Context: ie43dcee0b5dc477ea8cc411e55a1c2fa_D20210101-20210930, Unit: usd, Rule Element Id: 2836. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0015-Negative-Values] Fact us-gaap:RepaymentsOfLongTermDebt has a value of -3807000000 which is less than zero. This element should not have a negative value. The preparer should consider if the value is input correctly for this assertion and, after considering the appropriateness of the input, if incorrect, input the amount as a positive (i.e., absolute) value and provide a negated label. The properties of this us-gaap:RepaymentsOfLongTermDebt fact are: Context: i5186ec57705f43acb2caa08877342b8e_D20220101-20220930, Unit: usd, Rule Element Id: 2761. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0015-Negative-Values] Fact us-gaap:RepaymentsOfLongTermDebt has a value of -3332000000 which is less than zero. This element should not have a negative value. The preparer should consider if the value is input correctly for this assertion and, after considering the appropriateness of the input, if incorrect, input the amount as a positive (i.e., absolute) value and provide a negated label. The properties of this us-gaap:RepaymentsOfLongTermDebt fact are: Context: ie43dcee0b5dc477ea8cc411e55a1c2fa_D20210101-20210930, Unit: usd, Rule Element Id: 2761. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0015-Negative-Values] Fact us-gaap:DistributionMadeToLimitedPartnerCashDistributionsPaid has a value of -35000000 which is less than zero. This element should not have a negative value. The preparer should consider if the value is input correctly for this assertion and, after considering the appropriateness of the input, if incorrect, input the amount as a positive (i.e., absolute) value and provide a negated label. The properties of this us-gaap:DistributionMadeToLimitedPartnerCashDistributionsPaid fact are: Context: i5186ec57705f43acb2caa08877342b8e_D20220101-20220930, Unit: usd, Rule Element Id: 886. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0015-Negative-Values] Fact us-gaap:DistributionMadeToLimitedPartnerCashDistributionsPaid has a value of -35000000 which is less than zero. This element should not have a negative value. The preparer should consider if the value is input correctly for this assertion and, after considering the appropriateness of the input, if incorrect, input the amount as a positive (i.e., absolute) value and provide a negated label. The properties of this us-gaap:DistributionMadeToLimitedPartnerCashDistributionsPaid fact are: Context: ie43dcee0b5dc477ea8cc411e55a1c2fa_D20210101-20210930, Unit: usd, Rule Element Id: 886. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0015-Negative-Values] Fact us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders has a value of -1000000 which is less than zero. This element should not have a negative value. The preparer should consider if the value is input correctly for this assertion and, after considering the appropriateness of the input, if incorrect, input the amount as a positive (i.e., absolute) value and provide a negated label. The properties of this us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders fact are: Context: ifb4c82409f7c4670b42daea8bc7eded2_D20210401-20210630, Unit: usd, Rule Element Id: 2730. dpm-20220930.htm 4</Log>
    <Log type="Warning">[dqc-0015-Negative-Values] Fact us-gaap:DerivativeLiabilityNotOffsetPolicyElectionDeduction has a value of -1000000 which is less than zero. This element should not have a negative value. The preparer should consider if the value is input correctly for this assertion and, after considering the appropriateness of the input, if incorrect, input the amount as a positive (i.e., absolute) value and provide a negated label. The properties of this us-gaap:DerivativeLiabilityNotOffsetPolicyElectionDeduction fact are: Context: id3d7f69180ae4f72abdf5c887013e5da_I20220930, Unit: usd, Rule Element Id: 791. dpm-20220930.htm 4</Log>
  </Logs>
  <InputFiles>
    <File doctype="10-Q" original="dpm-20220930.htm">dpm-20220930.htm</File>
    <File>dcp-20220930xexhibit22.htm</File>
    <File>dcp-20220930xexhibit311.htm</File>
    <File>dcp-20220930xexhibit312.htm</File>
    <File>dcp-20220930xexhibit321.htm</File>
    <File>dcp-20220930xexhibit322.htm</File>
    <File>dpm-20220930.xsd</File>
    <File>dpm-20220930_cal.xml</File>
    <File>dpm-20220930_def.xml</File>
    <File>dpm-20220930_lab.xml</File>
    <File>dpm-20220930_pre.xml</File>
    <File>fifthamendmenttoreceivable.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="1515">http://fasb.org/us-gaap/2022</BaseTaxonomy>
    <BaseTaxonomy items="36">http://xbrl.sec.gov/dei/2022</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
