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Accounting Policies (Details) | 3 Months Ended
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Mar. 31, 2022 country
Accounting Policies [Abstract] |
Number of countries outside the US where strategic international offices are held | 4

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- Definition Number Of Countries Outside The United States Where Strategic International Offices Are Held + References No definition available. + Details
Name: | pnc_NumberOfCountriesOutsideTheUnitedStatesWhereStrategicInternationalOfficesAreHeld
Namespace Prefix: | pnc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration