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

Number Of Countries Outside The United States Where Strategic International Offices Are Held

No definition available.

Name:	pnc_NumberOfCountriesOutsideTheUnitedStatesWhereStrategicInternationalOfficesAreHeld
Namespace Prefix:	pnc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration