|
Segment Disclosures and Related Information - Assets (Details 2) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Assets [Abstract] | ||
| Consolidated total assets | $ 117,780 | $ 117,144 |
|
Alaska [Member]
|
||
| Assets [Abstract] | ||
| Consolidated total assets | 11,241 | 10,950 |
|
Lower 48 and Latin America [Member]
|
||
| Assets [Abstract] | ||
| Consolidated total assets | 28,250 | 28,895 |
|
Canada [Member]
|
||
| Assets [Abstract] | ||
| Consolidated total assets | 22,306 | 22,308 |
|
Europe [Member]
|
||
| Assets [Abstract] | ||
| Consolidated total assets | 15,071 | 15,562 |
|
Asia Pacific and Middle East [Member]
|
||
| Assets [Abstract] | ||
| Consolidated total assets | 24,038 | 23,721 |
|
Other International [Member]
|
||
| Assets [Abstract] | ||
| Consolidated total assets | 1,462 | 1,418 |
|
Corporate and Other [Member]
|
||
| Assets [Abstract] | ||
| Consolidated total assets | 7,826 | 6,823 |
|
Discontinued operations [Member]
|
||
| Assets [Abstract] | ||
| Consolidated total assets | $ 7,586 | $ 7,467 |