Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
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