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Loan Sale and Servicing Activities and Variable Interest Entities (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Liability related to investments in low income housing tax credits | $ 2,100 | $ 2,200 |
Low Income Housing Tax Credit Investments |  |  |
Amortization Recognized Low Income Housing Tax Credit Investments |  | 400 | $ 300
Tax Credits Recognized Low Income Housing Tax Credit Investments |  | 400 | 300
Other tax benefits associated with qualified investments in low income housing tax credits (less than) | 100 | $ 100 | $ 100
LIHTC and NMTC |  |  |
Amortization Recognized Low Income Housing Tax Credit Investments | 400 |  |
Tax Credits Recognized Low Income Housing Tax Credit Investments | $ 400 |  |

X
- Definition Represents the amount of amortization recognized associated with the adoption of ASU 2014-01 + References No definition available. + Details
Name: | pnc_AmortizationRecognizedLowIncomeHousingTaxCreditInvestments
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the liability related to investments in low income housing tax credits which is reflected in other liabilities on our Consolidated Balance Sheet. + References No definition available. + Details
Name: | pnc_LiabilityRelatedToInvestmentsInLowIncomeHousingTaxCredits
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of other tax benefits recognized associated with the adoption of ASU 2014-01 + References No definition available. + Details
Name: | pnc_OtherTaxBenefitsRecognizedLowIncomeHousingTaxCreditInvestments
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of tax credits recognized associated with the adoption of ASU 2014-01 + References No definition available. + Details
Name: | pnc_TaxCreditsRecognizedLowIncomeHousingTaxCreditInvestments
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=pnc_LowIncomeHousingTaxCreditInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=pnc_LowIncomeHousingTaxCreditsAndNewMarketsTaxCreditsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |