Parent Company (Income Statement) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Revenues [Abstract]
Noninterest income	$ 1,294,000,000	$ 1,384,000,000	$ 1,493,000,000
Operating Expenses [Abstract]
Income tax benefits	1,364,000,000	1,407,000,000	1,476,000,000
Other comprehensive income (loss), after tax and net of reclassifications into Net income	(373,000,000)	67,000,000	(398,000,000)
Comprehensive income attributable to PNC	3,733,000,000	4,251,000,000	3,803,000,000
Parent Company [Member]
Operating Revenues [Abstract]
Interest income	5,000,000	4,000,000
Noninterest income	14,000,000	30,000,000	28,000,000
Total operating revenue	3,178,000,000	3,264,000,000	3,338,000,000
Operating Expenses [Abstract]
Interest expense	78,000,000	97,000,000	107,000,000
Other expense	88,000,000	127,000,000	93,000,000
Total operating expense	166,000,000	224,000,000	200,000,000
Income before income taxes and equity in undistributed net income of subsidiaries	3,012,000,000	3,040,000,000	3,138,000,000
Income tax benefits	(99,000,000)	(61,000,000)	(89,000,000)
Income Before Equity In Undistributed Net Income Of Subsidiaries	3,111,000,000	3,101,000,000	3,227,000,000
Equity In Undistributed Net Income Of Subsidiaries	995,000,000	1,083,000,000	974,000,000
Net income attributable to common shareholders	4,106,000,000	4,184,000,000	4,201,000,000
Net pension and other postretirement benefit plan activity arising during the period.	(3,000,000)	(17,000,000)	34,000,000
Other comprehensive income (loss), after tax and net of reclassifications into Net income	(3,000,000)	(17,000,000)	34,000,000
Comprehensive income attributable to PNC	4,103,000,000	4,167,000,000	4,235,000,000
Parent Company [Member] | Bank Subsidiaries And Bank Holding Company [Member]
Operating Revenues [Abstract]
Dividends from	3,110,000,000	3,115,000,000	3,105,000,000
Operating Expenses [Abstract]
Equity In Undistributed Net Income Of Subsidiaries	736,000,000	854,000,000	845,000,000
Parent Company [Member] | Non Bank Subsidiaries [Member]
Operating Revenues [Abstract]
Dividends from	49,000,000	115,000,000	205,000,000
Operating Expenses [Abstract]
Equity In Undistributed Net Income Of Subsidiaries	$ 259,000,000	$ 229,000,000	$ 129,000,000