|
Loans and Allowance for Credit Losses, by Credit Quality Indicator (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Dec. 31, 2008
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Dec. 31, 2007
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|---|---|---|---|---|---|
| Loans And Leases Receivable [Abstract] | |||||
| Purchased Credit Impaired Loans | $ 36,719 | $ 41,430 | $ 51,705 | $ 58,797 | |
| Loans | 769,631 | 757,267 | 782,770 | 864,830 | 382,195 |
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Commercial and Industrial Loans [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Purchased Credit Impaired Loans | 399 | 718 | 1,911 | 4,580 | |
| Loans | 167,216 | 151,284 | 158,352 | 202,469 | 90,468 |
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Commercial Real Estate Mortgage [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Purchased Credit Impaired Loans | 3,270 | 2,855 | 4,137 | 5,803 | |
| Loans | 105,975 | 99,435 | 97,527 | 94,923 | 36,747 |
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Commercial Real Estate Construction [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Purchased Credit Impaired Loans | 1,745 | 2,949 | 5,207 | 6,462 | |
| Loans | 19,382 | 25,333 | 36,978 | 42,861 | 18,854 |
|
Lease Financing [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Purchased Credit Impaired Loans | 0 | 0 | |||
| Loans | 13,117 | 13,094 | 14,210 | 15,829 | 6,772 |
|
Foreign Loans [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Purchased Credit Impaired Loans | 1,353 | 1,413 | 1,733 | 1,859 | |
| Loans | 39,760 | 32,912 | 29,398 | 33,882 | 7,441 |
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Total Commercial [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Purchased Credit Impaired Loans | 6,767 | 7,935 | 12,988 | 18,704 | |
| Loans | 345,450 | 322,058 | 336,465 | 389,964 | 160,282 |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 166,817 | 150,566 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member] | Pass [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 144,980 | 126,058 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member] | Criticized [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 21,837 | 24,508 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 102,705 | 96,580 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member] | Pass [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 80,215 | 70,597 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member] | Criticized [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 22,490 | 25,983 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 17,637 | 22,384 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member] | Pass [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 10,865 | 11,256 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member] | Criticized [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 6,772 | 11,128 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 13,117 | 13,094 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member] | Pass [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 12,455 | 12,411 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member] | Criticized [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 662 | 683 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Foreign Loans [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 38,407 | 31,499 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Foreign Loans [Member] | Pass [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 36,567 | 30,341 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Foreign Loans [Member] | Criticized [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 1,840 | 1,158 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 338,683 | 314,123 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member] | Pass [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | 285,082 | 250,663 | |||
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member] | Criticized [Member]
|
|||||
| Loans And Leases Receivable [Abstract] | |||||
| Loans, excluding Purchased Credit Impaired Loans | $ 53,601 | $ 63,460 |