|
Loans and Allowance for Credit Losses, PCI, 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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|---|---|---|---|---|
| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | $ 36,719 | $ 41,430 | $ 51,705 | $ 58,797 |
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Commercial and Industrial Loans [Member]
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| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 399 | 718 | 1,911 | 4,580 |
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Commercial Real Estate Mortgage [Member]
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| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 3,270 | 2,855 | 4,137 | 5,803 |
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Commercial Real Estate Construction [Member]
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| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 1,745 | 2,949 | 5,207 | 6,462 |
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Foreign Loans [Member]
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| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 1,353 | 1,413 | 1,733 | 1,859 |
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Total Commercial [Member]
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| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 6,767 | 7,935 | 12,988 | 18,704 |
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Pass [Member] | Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
|
||||
| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 191 | 214 | ||
|
Pass [Member] | Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
|
||||
| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 640 | 352 | ||
|
Pass [Member] | Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
|
||||
| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 321 | 128 | ||
|
Pass [Member] | Purchased Credit-Impaired Loans [Member] | Foreign Loans [Member]
|
||||
| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 0 | 210 | ||
|
Pass [Member] | Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
|
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| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 1,152 | 904 | ||
|
Criticized [Member] | Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
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| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 208 | 504 | ||
|
Criticized [Member] | Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
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| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 2,630 | 2,503 | ||
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Criticized [Member] | Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
|
||||
| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 1,424 | 2,821 | ||
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Criticized [Member] | Purchased Credit-Impaired Loans [Member] | Foreign Loans [Member]
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| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | 1,353 | 1,203 | ||
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Criticized [Member] | Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
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| Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract] | ||||
| Purchased Credit Impaired Loans | $ 5,615 | $ 7,031 |