|
Loans and Allowance for Credit Losses, Loans by Credit Quality Indicator, Commercial (Details) (USD $)
In Millions, unless otherwise specified |
Jun. 30, 2013
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Dec. 31, 2012
|
Dec. 31, 2008
|
|---|---|---|---|
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Purchased Credit Impaired Loans | $ 28,799 | $ 30,968 | $ 58,797 |
| Loans | 801,974 | 799,574 | |
|
Total Commercial [Member]
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| Loans and Leases Receivable Disclosure [Abstract] | |||
| Purchased Credit Impaired Loans | 3,257 | 3,977 | 18,704 |
| Loans | 363,472 | 361,198 | |
|
Commercial and Industrial Loans [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Purchased Credit Impaired Loans | 195 | 259 | 4,580 |
| Loans | 188,758 | 187,759 | |
|
Commercial Real Estate Mortgage [Member]
|
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| Loans and Leases Receivable Disclosure [Abstract] | |||
| Purchased Credit Impaired Loans | 1,746 | 1,970 | 5,803 |
| Loans | 104,673 | 106,340 | |
|
Commercial Real Estate Construction [Member]
|
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| Loans and Leases Receivable Disclosure [Abstract] | |||
| Purchased Credit Impaired Loans | 602 | 877 | 6,462 |
| Loans | 16,442 | 16,904 | |
|
Lease Financing [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Purchased Credit Impaired Loans | 0 | 0 | |
| Loans | 11,766 | 12,424 | |
|
Foreign Loans [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Purchased Credit Impaired Loans | 714 | 871 | 1,859 |
| Loans | 41,833 | 37,771 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 360,215 | 357,221 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member] | Pass [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 324,948 | 315,867 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member] | Criticized [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 35,267 | 41,354 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 188,563 | 187,500 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member] | Pass [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 172,072 | 169,293 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member] | Criticized [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 16,491 | 18,207 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 102,927 | 104,370 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member] | Pass [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 88,937 | 87,183 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member] | Criticized [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 13,990 | 17,187 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 15,840 | 16,027 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member] | Pass [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 13,393 | 12,224 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member] | Criticized [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 2,447 | 3,803 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 11,766 | 12,424 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member] | Pass [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 11,180 | 11,787 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member] | Criticized [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 586 | 637 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Foreign Loans [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 41,119 | 36,900 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Foreign Loans [Member] | Pass [Member]
|
|||
| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | 39,366 | 35,380 | |
|
Loans Excluding Purchased Credit-Impaired Loans [Member] | Foreign Loans [Member] | Criticized [Member]
|
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| Loans and Leases Receivable Disclosure [Abstract] | |||
| Loans, excluding Purchased Credit Impaired Loans | $ 1,753 | $ 1,520 |