Loan Sale and Servicing Activities and Variable Interest Entities (Non-Consolidated VIEs) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
PNC Risk of Loss	$ 24,700	$ 26,160
Carrying Value of Assets	560,038	561,580
Carrying Value of Liabilities	$ 505,569	510,439
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration]	Equity investments
Variable Interest Entity, Primary Beneficiary
Carrying Value of Assets	$ 24,682	26,084
Carrying Value of Liabilities	2,627	2,119
Investment, low income housing tax credit, amount	3,900	3,000
Investment, new markets tax credit, amount	200	200
Investment, low income housing tax credit, liability	2,300	1,600
Investment, net markets tax credit, liability	100	200
Mortgage-Backed Securitizations | Variable Interest Entity, Primary Beneficiary
PNC Risk of Loss	19,187	21,451
Carrying Value of Assets	19,191	21,453
Carrying Value of Liabilities
Tax Credit Investments And Other | Variable Interest Entity, Primary Beneficiary
PNC Risk of Loss	5,513	4,709
Carrying Value of Assets	5,491	4,631
Carrying Value of Liabilities	$ 2,627	$ 2,119