Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended				1 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 US	Sep. 30, 2014 Equatorial Guinea	Jul. 31, 2013 Israel	Sep. 30, 2014 Israel
Income Tax Disclosure [Abstract]
Current	$ 120	$ 53	$ 213	$ 161
Deferred	37	63	61	169
Total Income Tax Provision	$ 157	$ 116	$ 274	$ 330
Effective Tax Rate	27.20%	37.20%	25.30%	29.60%
Income Tax Examination [Line Items]
Statutory Federal Corporate Tax Rate Current Year							25.00%
Statutory Federal Corporate Tax Rate Future Year							26.50%
Income Tax Examination, Year under Examination					2011	2009		2009