| Cover Page | Jul. 14, 2021 | Apr. 14, 2021 |
| Entity Information [Line Items] | ||
| Written Communications | false | |
| Entity Incorporation, State or Country Code | PA | |
| Document Type | 8-K | |
| Entity Central Index Key | 0000713676 | |
| Amendment Flag | false | |
| Document Period End Date | Jul. 14, 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 | |
| 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 |
