|
Derivative and Financial Instruments - Commodity GainLoss (Details 1) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Sep. 30, 2012
|
Sep. 30, 2011
|
|
|
Sales and other operating revenues [Member]
|
||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gains (losses) from commodity derivatives | $ (217) | $ 249 | $ (357) | $ 198 |
|
Other Income [Member]
|
||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gains (losses) from commodity derivatives | 3 | (6) | (2) | (2) |
|
Purchased commodities [Member]
|
||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gains (losses) from commodity derivatives | $ 184 | $ (191) | $ 288 | $ (129) |