|
Financial Instruments (Free-standing derivatives) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
|
| Free Standing Derivatives [Member] | ||
| Free standing derivatives | ||
| Gain (loss) on derivatives | $ (2,113) | $ (802) |
| Interest Rate Contract [Member] | ||
| Free standing derivatives | ||
| Gain (loss) on derivatives | (58) | (103) |
| Foreign Exchange Contract [Member] | ||
| Free standing derivatives | ||
| Gain (loss) on derivatives | (2,056) | (733) |
| Other Contract [Member] | ||
| Free standing derivatives | ||
| Gain (loss) on derivatives | $ 1 | $ 34 |