|
Fair Value, Option, Instrument Specific Credit Risk (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2013
|
Mar. 31, 2012
|
|
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||
| Gains (losses) attributable to instrument-specific credit risk | $ 37 | $ (26) |
|
Mortgages held for sale [Member]
|
||
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||
| Gains (losses) attributable to instrument-specific credit risk | 37 | (39) |
|
Loans held for sale [Member]
|
||
| Fair Value, Option, Quantitative Disclosures [Line Items] | ||
| Gains (losses) attributable to instrument-specific credit risk | $ 0 | $ 13 |