Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Examination [Line Items]
Current	$ (45)	$ 120	$ 64	$ 213
Deferred	69	37	(244)	61
Total Income Tax (Benefit) Provision	$ 24	$ 157	$ (180)	$ 274
Effective Tax Rate	(9.30%)	27.20%	30.40%	25.30%
US
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination			2012
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