|
Fair Value, Option, Instrument Specific Credit Risk (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
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||||
| Gains (losses) attributable to instrument-specific credit risk | $ 88 | $ (46) | $ 125 | $ (72) |
|
Mortgages held for sale [Member]
|
||||
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||||
| Gains (losses) attributable to instrument-specific credit risk | 88 | (52) | 125 | (91) |
|
Loans held for sale [Member]
|
||||
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||||
| Gains (losses) attributable to instrument-specific credit risk | $ 0 | $ 6 | $ 0 | $ 19 |