Certain Employee Benefit and Stock-Based Compensation Plans (Summary of Stock Option Activity) (Details) (USD $)	6 Months Ended
Jun. 30, 2011
Outstanding stock options, beginning balance	21,039
Stock options granted during the period	833
Stock options exercised during the period	(151)
Stock options cancelled during the period	(2,391)
Outstanding stock options, ending balance	19,330
Weighted-average exercise price, beginning of period	$ 92.25
Weighted-average exercise price of shares granted during period	$ 64.04
Weighted-average exercise price of shares exercised during period	$ 46.02
Weighted-average exercise price of shares cancelled during period	$ 81.37
Weighted-average exercise price, end of period	$ 92.74
Shares exercisable at end of period	13,104
Weighted average exercisable price of shares exercisable at end of period	$ 113.86
Stock Options PNC Bank [Member]
Outstanding stock options, beginning balance	19,825
Stock options granted during the period	833
Stock options exercised during the period	(151)
Stock options cancelled during the period	(2,331)
Outstanding stock options, ending balance	18,176
Weighted-average exercise price, beginning of period	$ 56.36
Weighted-average exercise price of shares granted during period	$ 64.04
Weighted-average exercise price of shares exercised during period	$ 46.02
Weighted-average exercise price of shares cancelled during period	$ 74.02
Weighted-average exercise price, end of period	$ 54.53
Shares exercisable at end of period	11,950
Weighted average exercisable price of shares exercisable at end of period	$ 57.79
Stock Options Converted From National City Options [Member]
Outstanding stock options, beginning balance	1,214
Stock options cancelled during the period	(60)
Outstanding stock options, ending balance	1,154
Weighted-average exercise price, beginning of period	$ 678.09
Weighted-average exercise price of shares cancelled during period	$ 366.67
Weighted-average exercise price, end of period	$ 694.28
Shares exercisable at end of period	1,154
Weighted average exercisable price of shares exercisable at end of period	$ 694.28

The number of shares into which fully or partially vested stock options outstanding as of the balance-sheet date can be currently converted under the option plan.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(c), d(2)

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(c)

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- Definition

The decrease in the number of reserved shares that could potentially be issued attributable to the exercise or conversion during the reporting period of previously issued stock options under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(e)

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- Definition

The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(e)

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(f)

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The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(f)

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- Definition

The quantity of shares issuable on stock options awarded under the plan during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(d)

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The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(d)

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance-sheet date, including vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(a)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(b)

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(a)

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