Certain Employee Benefit and Stock Based Compensation Plans (Stock Option Rollforward) (Details) - Jun. 30, 2015 - $ / shares	Total
Total Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, beginning balance	7,044,000
Exercised	(1,533,000)
Cancelled	(42,000)
Outstanding, ending balance	5,469,000
Exercisable, Shares	5,421,000
Weighted-average exercise price, beginning of period	$ 82.17
Weighted-average exercise price, exercised	59.42
Weighted-average exercise price, cancelled	187.83
Weighted-average exercise price, end of period	87.73
Exercisable, Weighted-average exercise price of shares	$ 87.94
PNC [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, beginning balance	6,701,000
Exercised	(1,533,000)
Cancelled	(28,000)
Outstanding, ending balance	5,140,000
Exercisable, Shares	5,092,000
Weighted-average exercise price, beginning of period	$ 56.41
Weighted-average exercise price, exercised	59.42
Weighted-average exercise price, cancelled	44.42
Weighted-average exercise price, end of period	55.58
Exercisable, Weighted-average exercise price of shares	$ 55.5
PNC Options Converted From National City Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding, beginning balance	343,000
Cancelled	(14,000)
Outstanding, ending balance	329,000
Exercisable, Shares	329,000
Weighted-average exercise price, beginning of period	$ 585.23
Weighted-average exercise price, cancelled	474.12
Weighted-average exercise price, end of period	590.02
Exercisable, Weighted-average exercise price of shares	$ 590.02