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v3.20.4

Fair Value (Narrative) (Details) - USD ($) $ in Billions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Carrying value of FHLB and FRB stock | $ 1.1 | $ 1.6
Distributions received over the life of the partnerships from liquidation of the underlying investments by the investee, period | 10 years |
Sensitivity analysis of fair value, inputs change for fair value | 0.10% |

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- Definition This element represents the sum of the carrying values of FHLB and FRB stock. + References No definition available. + Details
Name: | pnc_CarryingValueOfEquityInvestmentsCarriedAtCostAndFhlbAndFrbStock
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Distributions Received Over The Life Of The Partnerships From Liquidation Of The Underlying Investments By The Investee, Period + References No definition available. + Details
Name: | pnc_DistributionsReceivedOverTheLifeOfThePartnershipsFromLiquidationOfTheUnderlyingInvestmentsByTheInvesteePeriod
Namespace Prefix: | pnc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sensitivity Analysis Of Fair Value, Inputs Change For Fair Value + References No definition available. + Details
Name: | pnc_SensitivityAnalysisOfFairValueInputsChangeForFairValue
Namespace Prefix: | pnc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration