| Cover Page | Apr. 20, 2021 |
| Entity Information [Line Items] | |
| Written Communications | false |
| Entity Incorporation, State or Country Code | PA |
| Document Type | 8-K/A |
| Entity Central Index Key | 0000713676 |
| Amendment Flag | true |
| Amendment Description | This Amended 8-K is to provide an updated consent from KPMG LLP for PNC’s 8-K filed on April 20, 2021 |
| Entity Registrant Name | PNC FINANCIAL SERVICES GROUP, INC. |
| Entity File Number | 001-09718 |
| Entity Tax Identification Number | 25-1435979 |
| Entity Address, Address Line One | 300 Fifth Avenue |
| Entity Address, City or Town | Pittsburgh |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 15222-2401 |
| City Area Code | 888 |
| Local Phone Number | 762-2265 |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Document Period End Date | Apr. 20, 2021 |
| NEW YORK STOCK EXCHANGE, INC. [Member] | Common Stock [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock, par value $5.00 |
| Trading Symbol | PNC |
| Security Exchange Name | NYSE |
| NEW YORK STOCK EXCHANGE, INC. [Member] | Series P Preferred Stock [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing a 1/4,000 Interest in a Share of Fixed-to- Floating Rate Non-Cumulative Perpetual Preferred Stock, Series P |
| Trading Symbol | PNC P |
| Security Exchange Name | NYSE |
