|
Derivative and Financial Instruments - Commodity GainLoss (Details 1) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2013
|
Mar. 31, 2012
|
|
|
Sales and other operating revenues [Member]
|
||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Gains (losses) from commodity derivatives | $ (208) | $ (403) |
|
Other Income [Member]
|
||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Gains (losses) from commodity derivatives | 2 | (6) |
|
Purchased commodities [Member]
|
||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Gains (losses) from commodity derivatives | $ 185 | $ 398 |