| **Income Taxes (Details) - USD ($) $ in Millions** | 3 Months Ended | 6 Months Ended |
|----------------------------------------------------|----------------|----------------|
||
| **Income Tax Examination [Line Items]**            |           |           |   |   |
| Current                                            | $ 99           | $ 34           | $ 109 | $ 94 |
| Deferred                                           | (283)          | 7              | (312) | 24 |
| Total Income Tax (Benefit) Provision               | $ (184)        | $ 41           | $ (203) | $ 118 |
| Effective Tax Rate                                 | 62.80%         | 17.60%         | 60.80% | 23.10% |
| US                                                 |           |           |   |   |
| **Income Tax Examination [Line Items]**            |           |           |   |   |
| Income Tax Examination, Year under Examination     |           |           | 2011 |   |
| Equatorial Guinea                                  |           |           |   |   |
| **Income Tax Examination [Line Items]**            |           |           |   |   |
| Income Tax Examination, Year under Examination     |           |           | 2010 |   |
| Israel                                             |           |           |   |   |
| **Income Tax Examination [Line Items]**            |           |           |   |   |
| Income Tax Examination, Year under Examination     |           |           | 2010 |   |

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| - Definition
Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.
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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.
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| - Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
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Tax year being audited in the income tax examination, in CCYY format.
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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
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