|
Loans and Allowance for Credit Losses, Significant Activity (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
|
| Loans and Allowance for Credit Losses, Significant Activity [Abstract] | ||||
| Purchases | $ 2,624 | $ 7,303 | $ 3,729 | $ 9,342 |
| Sales | (1,926) | (1,285) | (4,258) | (3,258) |
| Transfers (to) MHFS/LHFS | (58) | 14 | (145) | (23) |
|
Commercial Portfolio Segment [Member]
|
||||
| Loans and Allowance for Credit Losses, Significant Activity [Abstract] | ||||
| Purchases | 2,122 | 7,219 | 3,148 | 9,175 |
| Sales | (1,796) | (1,115) | (3,812) | (2,935) |
| Transfers (to) MHFS/LHFS | (53) | 18 | (133) | (18) |
|
Consumer Portfolio Segment [Member]
|
||||
| Loans and Allowance for Credit Losses, Significant Activity [Abstract] | ||||
| Purchases | 502 | 84 | 581 | 167 |
| Sales | (130) | (170) | (446) | (323) |
| Transfers (to) MHFS/LHFS | $ (5) | $ (4) | $ (12) | $ (5) |