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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
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%	27.60%
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

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.