Loan Sale and Servicing Activities and Variable Interest Entities (Non-Consolidated VIEs) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Carrying Value of Assets	$ 554,722	$ 560,038
Carrying Value of Liabilities	498,271	505,569
Variable Interest Entity, Primary Beneficiary
PNC Risk of Loss	24,323	24,700
Carrying Value of Assets	24,194	24,682
Carrying Value of Liabilities	2,610	2,627
Investment, proportional amortization method, elected, amount	3,800	3,900
Amount of New Markets Tax Credit	100	200
Investment program, proportional amortization method, elected, commitment	2,200	2,300
New Markets Tax Credit liability	100	100
Variable Interest Entity, Primary Beneficiary | Mortgage-Backed Securitizations
PNC Risk of Loss	18,688	19,187
Carrying Value of Assets	18,691	19,191
Carrying Value of Liabilities	0	0
Variable Interest Entity, Primary Beneficiary | Tax Credit Investments And Other
PNC Risk of Loss	5,635	5,513
Carrying Value of Assets	5,503	5,491
Carrying Value of Liabilities	$ 2,610	$ 2,627