Parent Company (Income Statement) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Revenues [Abstract]
Noninterest Income, Other Operating Income	$ 1,205	$ 1,077	$ 1,039
Operating Expenses [Abstract]
Income tax benefits	1,082	102	1,268
Other comprehensive income (loss), after tax and net of reclassifications into Net income	(583)	117	(395)
Comprehensive income attributable to PNC	4,718	5,455	3,508
Parent Company
Operating Revenues [Abstract]
Interest income	147	109	93
Noninterest Income, Other Operating Income	(1)	37	13
Total operating revenue	3,360	3,800	3,142
Operating Expenses [Abstract]
Interest expense	281	215	197
Other Expenses	139	175	109
Total operating expense	420	390	306
Income before income taxes and equity in undistributed net income of subsidiaries	2,940	3,410	2,836
Income tax benefits	(54)	(52)	(96)
Income Before Equity In Undistributed Net Income Of Subsidiaries	2,994	3,462	2,932
Equity In Undistributed Net Income Of Subsidiaries	2,307	1,974	971
Net income attributable to common shareholders	5,301	5,338	3,903
Net pension and other postretirement benefit plan activity arising during the period.	1	1	13
Other comprehensive income (loss), after tax and net of reclassifications into Net income	1	1	13
Comprehensive income attributable to PNC	5,302	5,339	3,916
Parent Company | Bank Subsidiaries And Bank Holding Company
Operating Revenues [Abstract]
Dividends from	3,057	3,278	2,906
Operating Expenses [Abstract]
Equity In Undistributed Net Income Of Subsidiaries	2,126	1,974	818
Parent Company | Non Bank Subsidiaries
Operating Revenues [Abstract]
Dividends from	157	376	130
Operating Expenses [Abstract]
Equity In Undistributed Net Income Of Subsidiaries	$ 181	$ (98)	$ 153