Income Taxes (Narrative) (Details) - USD ($) $ in Billions	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Allocations for bad debt deductions of former thrift subsidiaries included in retained earnings	$ 0.1	$ 0.1

Allocation for bad debt deductions of former thrift subsidiaries for which no income tax has been provided which is included in retained earnings

No definition available.

Name:	pnc_Allocationsforbaddebtdeductionsofformerthriftsubsidiariesincludedinretainedearnings
Namespace Prefix:	pnc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant