Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Tax Examination [Line Items]
Current	$ 45	$ 99	$ 65	$ 109
Deferred	(228)	(283)	(414)	(312)
Total Income Tax Benefit	$ (183)	$ (184)	$ (349)	$ (203)
Effective Tax Rate	36.70%	62.80%	36.70%	60.80%
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			2011
Israel
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination			2011