XML 153 R48.htm IDEA: XBRL DOCUMENT
v3.21.2

Investment Securities (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2021 | Jun. 30, 2020
Schedule of Investments [Line Items] |  |  |
Net unsettled investment purchases | $ 300 | $ 300 | $ 300
Provision for credit losses on investment securities | 0 | 26 |
Investment securities, allowance for credit loss | 108 | 108 |
Federal National Mortgage Association Certificates and Obligations (FNMA) |  |  |
Schedule of Investments [Line Items] |  |  |
Debt securities amortized cost amount of debt securities exceeds 10 percent of shareholders equity | 32,300 | 32,300 |
Fair value of debt securities of a single issuer that exceeds 10 percent of shareholders equity | 33,200 | 33,200 |
Federal Home Loan Mortgage Corporation (FHLMC) Insured Loans |  |  |
Schedule of Investments [Line Items] |  |  |
Debt securities amortized cost amount of debt securities exceeds 10 percent of shareholders equity | 22,500 | 22,500 |
Fair value of debt securities of a single issuer that exceeds 10 percent of shareholders equity | $ 22,600 | $ 22,600 |

X
- Definition Debt Securities, Available-For-Sale And Held-To-Maturity, Allowance for Credit Loss + References No definition available. + Details
Name: | pnc_DebtSecuritiesAvailableForSaleAndHeldToMaturityAllowanceforCreditLoss
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Securities, Available-For-Sale And Held-To-Maturity, Credit Loss Expense (Reversal) + References No definition available. + Details
Name: | pnc_DebtSecuritiesAvailableForSaleAndHeldToMaturityCreditLossExpenseReversal
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | pnc_Debtsecuritiesamortizedcostamountofdebtsecuritiesexceeds10percentofshareholdersequity
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | pnc_Debtsecuritiesfairvalueamountofdebtsecuritiesexceeds10percentofstockholdersequity
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Investment Securities, Net Unsettled Investment Purchases + References No definition available. + Details
Name: | pnc_InvestmentSecuritiesNetUnsettledInvestmentPurchases
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_FederalNationalMortgageAssociationCertificatesAndObligationsFNMAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |