Loan Sale and Servicing Activities and Variable Interest Entities (Non-Consolidated VIEs) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
PNC Risk of Loss	$ 26,150	$ 27,077
Carrying Value of Assets	557,334	557,263
Carrying Value of Liabilities	507,853	511,451
Variable Interest Entity, Primary Beneficiary
Carrying Value of Assets	26,108	26,910
Carrying Value of Liabilities	2,264	2,064
Variable Interest Entity, Primary Beneficiary | Mortgage-Backed Securitizations
PNC Risk of Loss	21,511	22,666
Carrying Value of Assets	21,522	22,670
Carrying Value of Liabilities		1
Variable Interest Entity, Primary Beneficiary | Tax Credit Investments And Other
PNC Risk of Loss	4,639	4,411
Carrying Value of Assets	4,586	4,240
Carrying Value of Liabilities	2,264	$ 2,063
Variable Interest Entity, Primary Beneficiary | Low Income Housing Tax Credit Investments
Carrying Value of Assets	2,900
Carrying Value of Liabilities	1,600
Variable Interest Entity, Primary Beneficiary | New Market Tax Credit
Carrying Value of Assets	200
Carrying Value of Liabilities	$ 200