| **Capitalized Exploratory Well Costs (Details 2) (USD $)In Millions, unless otherwise specified** | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 |
|---------------------------------------------------------------------------------------------------|---------------|---------------|---------------|
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | $ 733         | $ 545         | $ 378         |
| Suspended Since 2011 and 2012                                                                     |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 498           |          |          |
| Suspended Since 2009 and 2010                                                                     |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 115           |          |          |
| Suspended Since 2008 and Prior                                                                    |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 120           |          |          |
| Diega Offshore Equatorial Guinea [Member]                                                         |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 108           |          |          |
| Diega Offshore Equatorial Guinea [Member] | Suspended Since 2011 and 2012                         |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 43            |          |          |
| Diega Offshore Equatorial Guinea [Member] | Suspended Since 2009 and 2010                         |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 23            |          |          |
| Diega Offshore Equatorial Guinea [Member] | Suspended Since 2008 and Prior                        |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 42            |          |          |
| Carla Offshore Equatorial Guinea [Member]                                                         |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 44            |          |          |
| Carla Offshore Equatorial Guinea [Member] | Suspended Since 2011 and 2012                         |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 44            |          |          |
| Carla Offshore Equatorial Guinea [Member] | Suspended Since 2009 and 2010                         |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Carla Offshore Equatorial Guinea [Member] | Suspended Since 2008 and Prior                        |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Felicita Offshore Equatorial Guinea [Member]                                                      |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 37            |          |          |
| Felicita Offshore Equatorial Guinea [Member] | Suspended Since 2011 and 2012                      |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 2             |          |          |
| Felicita Offshore Equatorial Guinea [Member] | Suspended Since 2009 and 2010                      |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 6             |          |          |
| Felicita Offshore Equatorial Guinea [Member] | Suspended Since 2008 and Prior                     |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 29            |          |          |
| Yolanda Offshore Equatorial Guinea [Member]                                                       |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 19            |          |          |
| Yolanda Offshore Equatorial Guinea [Member] | Suspended Since 2011 and 2012                       |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 1             |          |          |
| Yolanda Offshore Equatorial Guinea [Member] | Suspended Since 2009 and 2010                       |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 3             |          |          |
| Yolanda Offshore Equatorial Guinea [Member] | Suspended Since 2008 and Prior                      |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 15            |          |          |
| YoYo Offshore Cameron [Member]                                                                    |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 47            |          |          |
| YoYo Offshore Cameron [Member] | Suspended Since 2011 and 2012                                    |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 5             |          |          |
| YoYo Offshore Cameron [Member] | Suspended Since 2009 and 2010                                    |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 8             |          |          |
| YoYo Offshore Cameron [Member] | Suspended Since 2008 and Prior                                   |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 34            |          |          |
| Leviathan [Member]                                                                                |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 144           |          |          |
| Leviathan [Member] | Suspended Since 2011 and 2012                                                |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 97            |          |          |
| Leviathan [Member] | Suspended Since 2009 and 2010                                                |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 47            |          |          |
| Leviathan [Member] | Suspended Since 2008 and Prior                                               |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Leviathan-1 Deep Offshore Israel [Member]                                                         |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 73            |          |          |
| Leviathan-1 Deep Offshore Israel [Member] | Suspended Since 2011 and 2012                         |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 73            |          |          |
| Leviathan-1 Deep Offshore Israel [Member] | Suspended Since 2009 and 2010                         |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Leviathan-1 Deep Offshore Israel [Member] | Suspended Since 2008 and Prior                        |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Dalit Israel [Member]                                                                             |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 24            |          |          |
| Dalit Israel [Member] | Suspended Since 2011 and 2012                                             |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 1             |          |          |
| Dalit Israel [Member] | Suspended Since 2009 and 2010                                             |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 23            |          |          |
| Dalit Israel [Member] | Suspended Since 2008 and Prior                                            |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Tanin 1 Offshore Israel [Member]                                                                  |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 34            |          |          |
| Tanin 1 Offshore Israel [Member] | Suspended Since 2011 and 2012                                  |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 34            |          |          |
| Tanin 1 Offshore Israel [Member] | Suspended Since 2009 and 2010                                  |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Tanin 1 Offshore Israel [Member] | Suspended Since 2008 and Prior                                 |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Dolphin 1 Offshore Israel [Member]                                                                |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 23            |          |          |
| Dolphin 1 Offshore Israel [Member] | Suspended Since 2011 and 2012                                |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 23            |          |          |
| Dolphin 1 Offshore Israel [Member] | Suspended Since 2009 and 2010                                |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Dolphin 1 Offshore Israel [Member] | Suspended Since 2008 and Prior                               |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Cyprus A-1 Offshore Cyprus [Member]                                                               |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 74            |          |          |
| Cyprus A-1 Offshore Cyprus [Member] | Suspended Since 2011 and 2012                               |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 74            |          |          |
| Cyprus A-1 Offshore Cyprus [Member] | Suspended Since 2009 and 2010                               |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Cyprus A-1 Offshore Cyprus [Member] | Suspended Since 2008 and Prior                              |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Scotia Falkland Islands [Member]                                                                  |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 72            |          |          |
| Scotia Falkland Islands [Member] | Suspended Since 2011 and 2012                                  |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 72            |          |          |
| Scotia Falkland Islands [Member] | Suspended Since 2009 and 2010                                  |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Scotia Falkland Islands [Member] | Suspended Since 2008 and Prior                                 |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 0             |          |          |
| Other Projects [Member]                                                                           |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 34            |          |          |
| Other Projects [Member] | Suspended Since 2011 and 2012                                           |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 29            |          |          |
| Other Projects [Member] | Suspended Since 2009 and 2010                                           |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | 5             |          |          |
| Other Projects [Member] | Suspended Since 2008 and Prior                                          |          |          |          |
| **Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items]**          |          |          |          |
| Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year    | $ 0           |          |          |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of exploratory well costs that have been capitalized for a period of greater than one year after the completion of drilling.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph b -URI http://asc.fasb.org/extlink&oid=8451039&loc=SL6806780-109447
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| X                                                                                                                                                                                                          |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_ProjectsWithExploratoryWellCostsCapitalizedForMoreThanOneYearLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |