Certain Employee Benefit and Stock Based Compensation Plans (Stock Option Rollforward) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding stock options, beginning balance	15,564
Stock options granted during the period	161
Stock options exercised during the period	(2,492)
Stock options cancelled during the period	(494)
Outstanding stock options, ending balance	12,739
Weighted-average exercise price, beginning of period	$ 85.55
Weighted-average exercise price of shares granted during period	$ 63.87
Weighted-average exercise price of shares exercised during period	$ 44.84
Weighted-average exercise price of shares cancelled during period	$ 73.25
Weighted-average exercise price, end of period	$ 93.72
Exercisable, Weighted average exercisable price of shares	$ 98.61
Shares exercisable at end of period	10,981
PNC
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding stock options, beginning balance	14,817
Stock options granted during the period	161
Stock options exercised during the period	(2,492)
Stock options cancelled during the period	(475)
Outstanding stock options, ending balance	12,011
Weighted-average exercise price, beginning of period	$ 55.52
Weighted-average exercise price of shares granted during period	$ 63.87
Weighted-average exercise price of shares exercised during period	$ 44.84
Weighted-average exercise price of shares cancelled during period	$ 57.64
Weighted-average exercise price, end of period	$ 57.76
Exercisable, Weighted average exercisable price of shares	$ 56.84
Shares exercisable at end of period	10,253
PNC Options Converted From National City Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding stock options, beginning balance	747
Stock options cancelled during the period	(19)
Outstanding stock options, ending balance	728
Weighted-average exercise price, beginning of period	$ 681
Weighted-average exercise price of shares cancelled during period	$ 462
Weighted-average exercise price, end of period	$ 687
Exercisable, Weighted average exercisable price of shares	$ 687
Shares exercisable at end of period	728