|
Mortgage Banking Activities, Managed Servicing Portfolio Components (Details) (USD $)
In Billions, unless otherwise specified |
Dec. 31, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Components of Managed Servicing Portfolio [Abstract] | ||
| Loans serviced for others | $ 1,854 | $ 1,837 |
| Total managed servicing portfolio | 2,340 | 2,329 |
| Ratio of MSRs to related loans serviced for others | 0.76% | 0.86% |
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Commercial Mortgage Servicing [Member]
|
||
| Components of Managed Servicing Portfolio [Abstract] | ||
| Loans serviced for others | 398 | 408 |
| Owned loans serviced | 106 | 99 |
| Subservicing | 14 | 13 |
| Total managed servicing portfolio | 518 | 520 |
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Residential Mortgage Servicing [Member]
|
||
| Components of Managed Servicing Portfolio [Abstract] | ||
| Loans serviced for others | 1,456 | 1,429 |
| Owned loans serviced | 358 | 371 |
| Subservicing | 8 | 9 |
| Total managed servicing portfolio | $ 1,822 | $ 1,809 |