Cover page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2021	Feb. 04, 2022	Jun. 30, 2021
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-09718
Entity Registrant Name	PNC FINANCIAL SERVICES GROUP, INC
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	25-1435979
Entity Address, Address Line One	The Tower at PNC Plaza
Entity Address, Address Line Two	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
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
ICFR Auditor Attestation Flag	true
Entity Public Float			$ 80.8
Entity Common Stock, Shares Outstanding		418,454,799
Documents Incorporated by Reference	Portions of the definitive Proxy Statement of The PNC Financial Services Group, Inc. to be filed pursuant to Regulation 14A for the 2022 annual meeting of shareholders (Proxy Statement) are incorporated by reference into Part III of this Form 10-K.
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0000713676
Common stock
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $5.00
Trading Symbol	PNC
Security Exchange Name	NYSE
Series P Preferred Stock
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