<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>1169</ContextCount>
  <ElementCount>526</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>246</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000001 - Document - Cover Page</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/CoverPage</Role>
      <ShortName>Cover Page</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>9952151 - Statement - Consolidated Income Statement</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/ConsolidatedIncomeStatement</Role>
      <ShortName>Consolidated Income Statement</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>9952152 - Statement - Consolidated Statement of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/ConsolidatedStatementofComprehensiveIncome</Role>
      <ShortName>Consolidated Statement of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>9952153 - Statement - Consolidated Balance Sheet</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/ConsolidatedBalanceSheet</Role>
      <ShortName>Consolidated Balance Sheet</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>9952154 - Statement - Consolidated Balance Sheet (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/ConsolidatedBalanceSheetParenthetical</Role>
      <ShortName>Consolidated Balance Sheet (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>9952155 - Statement - Consolidated Statement of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/ConsolidatedStatementofCashFlows</Role>
      <ShortName>Consolidated Statement of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>9952156 - Statement - Consolidated Statement of Cash Flows (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/ConsolidatedStatementofCashFlowsParenthetical</Role>
      <ShortName>Consolidated Statement of Cash Flows (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>9952157 - Disclosure - Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/AccountingPolicies</Role>
      <ShortName>Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>9952158 - Disclosure - Acquisition Activity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/AcquisitionActivity</Role>
      <ShortName>Acquisition Activity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>9952159 - Disclosure - Investment Securities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/InvestmentSecurities</Role>
      <ShortName>Investment Securities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>9952160 - Disclosure - Loans and Related Allowance for Credit Losses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLosses</Role>
      <ShortName>Loans and Related Allowance for Credit Losses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>9952161 - Disclosure - Loan Sale and Servicing Activities and Variable Interest Entities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoanSaleandServicingActivitiesandVariableInterestEntities</Role>
      <ShortName>Loan Sale and Servicing Activities and Variable Interest Entities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>9952162 - Disclosure - Goodwill and Mortgage Servicing Rights</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/GoodwillandMortgageServicingRights</Role>
      <ShortName>Goodwill and Mortgage Servicing Rights</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>9952163 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/Leases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>9952164 - Disclosure - Borrowed Funds</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/BorrowedFunds</Role>
      <ShortName>Borrowed Funds</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>9952165 - Disclosure - Commitments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/Commitments</Role>
      <ShortName>Commitments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>9952166 - Disclosure - Total Equity and Other Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/TotalEquityandOtherComprehensiveIncome</Role>
      <ShortName>Total Equity and Other Comprehensive Income</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>9952167 - Disclosure - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/EarningsPerShare</Role>
      <ShortName>Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>9952168 - Disclosure - Fair Value</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FairValue</Role>
      <ShortName>Fair Value</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>9952169 - Disclosure - Financial Derivatives</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FinancialDerivatives</Role>
      <ShortName>Financial Derivatives</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>9952170 - Disclosure - Legal Proceedings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LegalProceedings</Role>
      <ShortName>Legal Proceedings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>9952171 - Disclosure - Segment Reporting</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/SegmentReporting</Role>
      <ShortName>Segment Reporting</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>9952172 - Disclosure - Fee-Based Revenue from Contracts with Customers</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FeeBasedRevenuefromContractswithCustomers</Role>
      <ShortName>Fee-Based Revenue from Contracts with Customers</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>9952173 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>9955511 - Disclosure - Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/AccountingPoliciesPolicies</Role>
      <ShortName>Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.pnc.com/role/AccountingPolicies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>9955512 - Disclosure - Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/AccountingPoliciesTables</Role>
      <ShortName>Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/AccountingPolicies</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>9955513 - Disclosure - Acquisition Activity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/AcquisitionActivityTables</Role>
      <ShortName>Acquisition Activity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/AcquisitionActivity</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>9955514 - Disclosure - Investment Securities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/InvestmentSecuritiesTables</Role>
      <ShortName>Investment Securities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/InvestmentSecurities</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>9955515 - Disclosure - Loans and Related Allowance for Credit Losses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesTables</Role>
      <ShortName>Loans and Related Allowance for Credit Losses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLosses</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>9955516 - Disclosure - Loan Sale and Servicing Activities and Variable Interest Entities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoanSaleandServicingActivitiesandVariableInterestEntitiesTables</Role>
      <ShortName>Loan Sale and Servicing Activities and Variable Interest Entities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoanSaleandServicingActivitiesandVariableInterestEntities</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>9955517 - Disclosure - Goodwill and Mortgage Servicing Rights (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/GoodwillandMortgageServicingRightsTables</Role>
      <ShortName>Goodwill and Mortgage Servicing Rights (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/GoodwillandMortgageServicingRights</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>9955518 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/Leases</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>9955519 - Disclosure - Borrowed Funds (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/BorrowedFundsTables</Role>
      <ShortName>Borrowed Funds (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/BorrowedFunds</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>9955520 - Disclosure - Commitments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/CommitmentsTables</Role>
      <ShortName>Commitments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/Commitments</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>9955521 - Disclosure - Total Equity and Other Comprehensive Income (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/TotalEquityandOtherComprehensiveIncomeTables</Role>
      <ShortName>Total Equity and Other Comprehensive Income (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/TotalEquityandOtherComprehensiveIncome</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>9955522 - Disclosure - Earnings per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/EarningsperShareTables</Role>
      <ShortName>Earnings per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>9955523 - Disclosure - Fair Value (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FairValueTables</Role>
      <ShortName>Fair Value (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FairValue</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>9955524 - Disclosure - Financial Derivatives (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FinancialDerivativesTables</Role>
      <ShortName>Financial Derivatives (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FinancialDerivatives</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>9955525 - Disclosure - Segment Reporting (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/SegmentReportingTables</Role>
      <ShortName>Segment Reporting (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/SegmentReporting</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>9955526 - Disclosure - Fee-Based Revenue from Contracts with Customers (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FeeBasedRevenuefromContractswithCustomersTables</Role>
      <ShortName>Fee-Based Revenue from Contracts with Customers (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FeeBasedRevenuefromContractswithCustomers</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>9955527 - Disclosure - Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/AccountingPoliciesDetails</Role>
      <ShortName>Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/AccountingPoliciesTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>9955528 - Disclosure - Acquisition Activity (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/AcquisitionActivityNarrativeDetails</Role>
      <ShortName>Acquisition Activity (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/AcquisitionActivityTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>9955529 - Disclosure - Acquisition Activity (Acquisition Consideration) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/AcquisitionActivityAcquisitionConsiderationDetails</Role>
      <ShortName>Acquisition Activity (Acquisition Consideration) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/AcquisitionActivityTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>9955530 - Disclosure - Acquisition Activity (Fair Value and Unpaid Principal Balance of Loans Acquired) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/AcquisitionActivityFairValueandUnpaidPrincipalBalanceofLoansAcquiredDetails</Role>
      <ShortName>Acquisition Activity (Fair Value and Unpaid Principal Balance of Loans Acquired) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/AcquisitionActivityTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>9955531 - Disclosure - Acquisition Activity (PCD Loan Activity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/AcquisitionActivityPCDLoanActivityDetails</Role>
      <ShortName>Acquisition Activity (PCD Loan Activity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/AcquisitionActivityTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>9955532 - Disclosure - Acquisition Activity (PSL Activity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/AcquisitionActivityPSLActivityDetails</Role>
      <ShortName>Acquisition Activity (PSL Activity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/AcquisitionActivityTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>9955533 - Disclosure - Investment Securities (Summary) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/InvestmentSecuritiesSummaryDetails</Role>
      <ShortName>Investment Securities (Summary) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/InvestmentSecuritiesTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>9955534 - Disclosure - Investment Securities (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/InvestmentSecuritiesNarrativeDetails</Role>
      <ShortName>Investment Securities (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/InvestmentSecuritiesTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>9955535 - Disclosure - Investment Securities (Gross Unrealized Loss and Fair Value of Securities Available for Sale Without an Allowance for Credit Losses) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/InvestmentSecuritiesGrossUnrealizedLossandFairValueofSecuritiesAvailableforSaleWithoutanAllowanceforCreditLossesDetails</Role>
      <ShortName>Investment Securities (Gross Unrealized Loss and Fair Value of Securities Available for Sale Without an Allowance for Credit Losses) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/InvestmentSecuritiesTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>9955536 - Disclosure - Investment Securities (Gains (Losses) on Sales of Securities Available for Sale) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/InvestmentSecuritiesGainsLossesonSalesofSecuritiesAvailableforSaleDetails</Role>
      <ShortName>Investment Securities (Gains (Losses) on Sales of Securities Available for Sale) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/InvestmentSecuritiesTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>9955537 - Disclosure - Investment Securities (Contractual Maturity of Securities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/InvestmentSecuritiesContractualMaturityofSecuritiesDetails</Role>
      <ShortName>Investment Securities (Contractual Maturity of Securities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/InvestmentSecuritiesTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>9955538 - Disclosure - Investment Securities (Fair Value of Securities Pledged and Accepted as Collateral) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/InvestmentSecuritiesFairValueofSecuritiesPledgedandAcceptedasCollateralDetails</Role>
      <ShortName>Investment Securities (Fair Value of Securities Pledged and Accepted as Collateral) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/InvestmentSecuritiesTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>9955539 - Disclosure - Loans and Related Allowance for Credit Losses (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesNarrativeDetails</Role>
      <ShortName>Loans and Related Allowance for Credit Losses (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>9955540 - Disclosure - Loans and Related Allowance for Credit Losses (Analysis of Loan Portfolio) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesAnalysisofLoanPortfolioDetails</Role>
      <ShortName>Loans and Related Allowance for Credit Losses (Analysis of Loan Portfolio) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>9955541 - Disclosure - Loans and Related Allowance for Credit Losses (Nonperforming Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesNonperformingAssetsDetails</Role>
      <ShortName>Loans and Related Allowance for Credit Losses (Nonperforming Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>9955542 - Disclosure - Loans and Related Allowance for Credit Losses (Commercial Lending Asset Quality Indicators) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesCommercialLendingAssetQualityIndicatorsDetails</Role>
      <ShortName>Loans and Related Allowance for Credit Losses (Commercial Lending Asset Quality Indicators) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>9955543 - Disclosure - Loans and Related Allowance for Credit Losses (Home Equity and Residential Real Estate Credit Quality Indicators) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesHomeEquityandResidentialRealEstateCreditQualityIndicatorsDetails</Role>
      <ShortName>Loans and Related Allowance for Credit Losses (Home Equity and Residential Real Estate Credit Quality Indicators) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>9955544 - Disclosure - Loans and Related Allowance for Credit Losses (Credit Quality Indicators for Automobile, Credit Card, Education and Other Consumer Loan Classes) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesCreditQualityIndicatorsforAutomobileCreditCardEducationandOtherConsumerLoanClassesDetails</Role>
      <ShortName>Loans and Related Allowance for Credit Losses (Credit Quality Indicators for Automobile, Credit Card, Education and Other Consumer Loan Classes) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>9955545 - Disclosure - Loans and Related Allowance for Credit Losses (Commerical FDMs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesCommericalFDMsDetails</Role>
      <ShortName>Loans and Related Allowance for Credit Losses (Commerical FDMs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>9955546 - Disclosure - Loans and Related Allowance for Credit Losses (Financial Effect of Commerical FDMs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesFinancialEffectofCommericalFDMsDetails</Role>
      <ShortName>Loans and Related Allowance for Credit Losses (Financial Effect of Commerical FDMs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>9955547 - Disclosure - Loans and Related Allowance for Credit Losses (Delinquency Status of Commerical FDMS) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesDelinquencyStatusofCommericalFDMSDetails</Role>
      <ShortName>Loans and Related Allowance for Credit Losses (Delinquency Status of Commerical FDMS) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>9955548 - Disclosure - Loans and Related Allowance for Credit Losses (Consumer FDMs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesConsumerFDMsDetails</Role>
      <ShortName>Loans and Related Allowance for Credit Losses (Consumer FDMs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>9955549 - Disclosure - Loans and Related Allowance for Credit Losses (Rollforward of Allowance for Credit Losses of Loans and Leases) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesRollforwardofAllowanceforCreditLossesofLoansandLeasesDetails</Role>
      <ShortName>Loans and Related Allowance for Credit Losses (Rollforward of Allowance for Credit Losses of Loans and Leases) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoansandRelatedAllowanceforCreditLossesTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>9955550 - Disclosure - Loan Sale and Servicing Activities and Variable Interest Entities (Loan Sale and Servicing Activities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoanSaleandServicingActivitiesandVariableInterestEntitiesLoanSaleandServicingActivitiesDetails</Role>
      <ShortName>Loan Sale and Servicing Activities and Variable Interest Entities (Loan Sale and Servicing Activities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoanSaleandServicingActivitiesandVariableInterestEntitiesTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>9955551 - Disclosure - Loan Sale and Servicing Activities and Variable Interest Entities (Principal Balance, Delinquent Loans (Loans 90 Days or More Past Due), and Net Charge-Offs Related to Serviced Loans) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoanSaleandServicingActivitiesandVariableInterestEntitiesPrincipalBalanceDelinquentLoansLoans90DaysorMorePastDueandNetChargeOffsRelatedtoServicedLoansDetails</Role>
      <ShortName>Loan Sale and Servicing Activities and Variable Interest Entities (Principal Balance, Delinquent Loans (Loans 90 Days or More Past Due), and Net Charge-Offs Related to Serviced Loans) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoanSaleandServicingActivitiesandVariableInterestEntitiesTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>9955552 - Disclosure - Loan Sale and Servicing Activities and Variable Interest Entities (Non-Consolidated VIEs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoanSaleandServicingActivitiesandVariableInterestEntitiesNonConsolidatedVIEsDetails</Role>
      <ShortName>Loan Sale and Servicing Activities and Variable Interest Entities (Non-Consolidated VIEs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoanSaleandServicingActivitiesandVariableInterestEntitiesTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>9955553 - Disclosure - Loan Sale and Servicing Activities and Variable Interest Entities (Loan Sale and Servicing Activities and Variable Interest Entities) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LoanSaleandServicingActivitiesandVariableInterestEntitiesLoanSaleandServicingActivitiesandVariableInterestEntitiesNarrativeDetails</Role>
      <ShortName>Loan Sale and Servicing Activities and Variable Interest Entities (Loan Sale and Servicing Activities and Variable Interest Entities) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LoanSaleandServicingActivitiesandVariableInterestEntitiesTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>9955554 - Disclosure - Goodwill Mortgage Servicing Rights (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/GoodwillMortgageServicingRightsNarrativeDetails</Role>
      <ShortName>Goodwill Mortgage Servicing Rights (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>9955555 - Disclosure - Goodwill and Mortgage Servicing Rights (Mortgage Servicing Rights) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/GoodwillandMortgageServicingRightsMortgageServicingRightsDetails</Role>
      <ShortName>Goodwill and Mortgage Servicing Rights (Mortgage Servicing Rights) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/GoodwillandMortgageServicingRightsTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>9955556 - Disclosure - Goodwill Mortgage Servicing Rights (Commercial and Residential Mortgage Servicing Rights - Key Valuation Assumptions) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/GoodwillMortgageServicingRightsCommercialandResidentialMortgageServicingRightsKeyValuationAssumptionsDetails</Role>
      <ShortName>Goodwill Mortgage Servicing Rights (Commercial and Residential Mortgage Servicing Rights - Key Valuation Assumptions) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>9955557 - Disclosure - Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LeasesDetails</Role>
      <ShortName>Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LeasesTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>9955558 - Disclosure - Borrowed Funds (Remaining Maturity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/BorrowedFundsRemainingMaturityDetails</Role>
      <ShortName>Borrowed Funds (Remaining Maturity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/BorrowedFundsTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>9955559 - Disclosure - Borrowed Funds (FHLB Borrowings, Senior Debt and Subordinated Debt) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/BorrowedFundsFHLBBorrowingsSeniorDebtandSubordinatedDebtDetails</Role>
      <ShortName>Borrowed Funds (FHLB Borrowings, Senior Debt and Subordinated Debt) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/BorrowedFundsTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>9955560 - Disclosure - Borrowed Funds (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/BorrowedFundsNarrativeDetails</Role>
      <ShortName>Borrowed Funds (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/BorrowedFundsTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>9955561 - Disclosure - Commitments (Other Commitments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/CommitmentsOtherCommitmentsDetails</Role>
      <ShortName>Commitments (Other Commitments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/CommitmentsTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>9955562 - Disclosure - Commitments (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/CommitmentsNarrativeDetails</Role>
      <ShortName>Commitments (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/CommitmentsTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>9955563 - Disclosure - Total Equity and Other Comprehensive Income (Rollforward of Total Equity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/TotalEquityandOtherComprehensiveIncomeRollforwardofTotalEquityDetails</Role>
      <ShortName>Total Equity and Other Comprehensive Income (Rollforward of Total Equity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/TotalEquityandOtherComprehensiveIncomeTables</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>9955564 - Disclosure - Total Equity and Other Comprehensive Income (Other Comprehensive Income) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/TotalEquityandOtherComprehensiveIncomeOtherComprehensiveIncomeDetails</Role>
      <ShortName>Total Equity and Other Comprehensive Income (Other Comprehensive Income) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/TotalEquityandOtherComprehensiveIncomeTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>9955565 - Disclosure - Total Equity and Other Comprehensive Income (Accumulated Other Comprehensive Income (Loss) Components) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/TotalEquityandOtherComprehensiveIncomeAccumulatedOtherComprehensiveIncomeLossComponentsDetails</Role>
      <ShortName>Total Equity and Other Comprehensive Income (Accumulated Other Comprehensive Income (Loss) Components) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/TotalEquityandOtherComprehensiveIncomeTables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>9955566 - Disclosure - Total Equity and Other Comprehensive Income (Dividends Per Share) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/TotalEquityandOtherComprehensiveIncomeDividendsPerShareDetails</Role>
      <ShortName>Total Equity and Other Comprehensive Income (Dividends Per Share) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/TotalEquityandOtherComprehensiveIncomeTables</ParentRole>
      <Position>81</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>9955567 - Disclosure - Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/EarningsPerShareDetails</Role>
      <ShortName>Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/EarningsPerShare</ParentRole>
      <Position>82</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>9955568 - Disclosure - Fair Value (Recurring Fair Value Measurements) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FairValueRecurringFairValueMeasurementsDetails</Role>
      <ShortName>Fair Value (Recurring Fair Value Measurements) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FairValueTables</ParentRole>
      <Position>83</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>9955569 - Disclosure - Fair Value (Reconciliation of Recurring Fair Value Measurements) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FairValueReconciliationofRecurringFairValueMeasurementsDetails</Role>
      <ShortName>Fair Value (Reconciliation of Recurring Fair Value Measurements) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FairValueTables</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>9955570 - Disclosure - Fair Value (Fair Value Measurements - Recurring Quantitative Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FairValueFairValueMeasurementsRecurringQuantitativeInformationDetails</Role>
      <ShortName>Fair Value (Fair Value Measurements - Recurring Quantitative Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FairValueTables</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>9955571 - Disclosure - Fair Value (Nonrecurring Fair Value Measurements) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FairValueNonrecurringFairValueMeasurementsDetails</Role>
      <ShortName>Fair Value (Nonrecurring Fair Value Measurements) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FairValueTables</ParentRole>
      <Position>86</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>9955572 - Disclosure - Fair Value (Fair Value Option - Fair Value and Principal Balances) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FairValueFairValueOptionFairValueandPrincipalBalancesDetails</Role>
      <ShortName>Fair Value (Fair Value Option - Fair Value and Principal Balances) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FairValueTables</ParentRole>
      <Position>87</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>9955573 - Disclosure - Fair Value (Fair Value Option - Changes in Fair Value) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FairValueFairValueOptionChangesinFairValueDetails</Role>
      <ShortName>Fair Value (Fair Value Option - Changes in Fair Value) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FairValueTables</ParentRole>
      <Position>88</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>9955574 - Disclosure - Fair Value (Additional Fair Value Information Related To Financial Instruments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FairValueAdditionalFairValueInformationRelatedToFinancialInstrumentsDetails</Role>
      <ShortName>Fair Value (Additional Fair Value Information Related To Financial Instruments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FairValueTables</ParentRole>
      <Position>89</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>9955575 - Disclosure - Financial Derivatives (Total Derivatives) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FinancialDerivativesTotalDerivativesDetails</Role>
      <ShortName>Financial Derivatives (Total Derivatives) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FinancialDerivativesTables</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>9955576 - Disclosure - Financial Derivatives (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FinancialDerivativesNarrativeDetails</Role>
      <ShortName>Financial Derivatives (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FinancialDerivativesTables</ParentRole>
      <Position>91</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>9955577 - Disclosure - Financial Derivatives (Gains (Losses) Recognized on Fair Value and Cash Flow Hedges in the Consolidated Income Statement) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FinancialDerivativesGainsLossesRecognizedonFairValueandCashFlowHedgesintheConsolidatedIncomeStatementDetails</Role>
      <ShortName>Financial Derivatives (Gains (Losses) Recognized on Fair Value and Cash Flow Hedges in the Consolidated Income Statement) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FinancialDerivativesTables</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>9955578 - Disclosure - Financial Derivatives (Impact of Fair Value Hedge Accounting on the Carrying Value of Hedged Items) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FinancialDerivativesImpactofFairValueHedgeAccountingontheCarryingValueofHedgedItemsDetails</Role>
      <ShortName>Financial Derivatives (Impact of Fair Value Hedge Accounting on the Carrying Value of Hedged Items) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FinancialDerivativesTables</ParentRole>
      <Position>93</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>9955579 - Disclosure - Financial Derivatives (Gains (Losses) on Derivatives Not Designated As Hedging Instruments under GAAP) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FinancialDerivativesGainsLossesonDerivativesNotDesignatedAsHedgingInstrumentsunderGAAPDetails</Role>
      <ShortName>Financial Derivatives (Gains (Losses) on Derivatives Not Designated As Hedging Instruments under GAAP) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FinancialDerivativesTables</ParentRole>
      <Position>94</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>9955580 - Disclosure - Financial Derivatives (Derivative Assets and Liabilities Offsetting) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FinancialDerivativesDerivativeAssetsandLiabilitiesOffsettingDetails</Role>
      <ShortName>Financial Derivatives (Derivative Assets and Liabilities Offsetting) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FinancialDerivativesTables</ParentRole>
      <Position>95</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>9955581 - Disclosure - Financial Derivatives (Credit-Risk Contingent Features) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FinancialDerivativesCreditRiskContingentFeaturesDetails</Role>
      <ShortName>Financial Derivatives (Credit-Risk Contingent Features) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FinancialDerivativesTables</ParentRole>
      <Position>96</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>9955582 - Disclosure - Legal Proceedings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/LegalProceedingsDetails</Role>
      <ShortName>Legal Proceedings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/LegalProceedings</ParentRole>
      <Position>97</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>9955583 - Disclosure - Segment Reporting (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/SegmentReportingNarrativeDetails</Role>
      <ShortName>Segment Reporting (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/SegmentReportingTables</ParentRole>
      <Position>98</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>9955584 - Disclosure - Segment Reporting - Schedule of Business Segment Results (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/SegmentReportingScheduleofBusinessSegmentResultsDetails</Role>
      <ShortName>Segment Reporting - Schedule of Business Segment Results (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>9955585 - Disclosure - Segment Reporting - Reconciliation of Business Segment Results to Consolidated (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/SegmentReportingReconciliationofBusinessSegmentResultstoConsolidatedDetails</Role>
      <ShortName>Segment Reporting - Reconciliation of Business Segment Results to Consolidated (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>9955586 - Disclosure - Fee-Based Revenue from Contracts with Customers (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FeeBasedRevenuefromContractswithCustomersNarrativeDetails</Role>
      <ShortName>Fee-Based Revenue from Contracts with Customers (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FeeBasedRevenuefromContractswithCustomersTables</ParentRole>
      <Position>101</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>9955587 - Disclosure - Fee-Based Revenue from Contracts with Customers (Noninterest Income by Business Segment and Reconciliation to Consolidated Noninterest Income) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/FeeBasedRevenuefromContractswithCustomersNoninterestIncomebyBusinessSegmentandReconciliationtoConsolidatedNoninterestIncomeDetails</Role>
      <ShortName>Fee-Based Revenue from Contracts with Customers (Noninterest Income by Business Segment and Reconciliation to Consolidated Noninterest Income) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/FeeBasedRevenuefromContractswithCustomersTables</ParentRole>
      <Position>102</Position>
    </Report>
    <Report instance="pnc-20260331.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>9955588 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.pnc.com/role/SubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.pnc.com/role/SubsequentEvents</ParentRole>
      <Position>103</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-Q" isDefinitelyFs="true" isUsgaap="true" original="pnc-20260331.htm">pnc-20260331.htm</File>
    <File>pnc-20260331.xsd</File>
    <File>pnc-20260331_cal.xml</File>
    <File>pnc-20260331_def.xml</File>
    <File>pnc-20260331_lab.xml</File>
    <File>pnc-20260331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>pnc-20260331_g1.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="3656">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="30">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
