|
Mortgage Banking Activities, Liability for Mortage Loan Repurchase Losses (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Liability For Mortgage Loan Repurchase Losses [Abstract] | |||
| Balance, beginning of year | $ 1,289 | $ 1,033 | $ 589 |
| Wachovia acquisition | 0 | 0 | 31 |
| Loan sales | 101 | 144 | 302 |
| Change in estimate - primarily due to credit | 1,184 | 1,474 | 625 |
| Total additions | 1,285 | 1,618 | 958 |
| Losses | (1,248) | (1,362) | (514) |
| Balance, end of year | $ 1,326 | $ 1,289 | $ 1,033 |