| **Income Taxes (Details) (USD $)In Millions, unless otherwise specified** | 3 Months Ended                                           |
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| **Income Tax Examination [Line Items]**                                   |                                                     |   |
| Current                                                                   | $ 10us-gaap_CurrentIncomeTaxExpenseBenefit               | $ 60us-gaap_CurrentIncomeTaxExpenseBenefit |
| Deferred                                                                  | (30)us-gaap_DeferredIncomeTaxExpenseBenefit              | 17us-gaap_DeferredIncomeTaxExpenseBenefit |
| Total Income Tax (Benefit) Provision                                      | $ (20)us-gaap_IncomeTaxExpenseBenefit                    | $ 77us-gaap_IncomeTaxExpenseBenefit |
| Effective Tax Rate                                                        | 47.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 27.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations |
| 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                            | 2009                                                     |   |
| 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.
+ References
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| - Definition
Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.
+ References
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| - Definition
Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
+ References
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| - Definition
Tax year being audited in the income tax examination, in CCYY format.
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No definition available.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
+ References
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