Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Tax Disclosure [Abstract]
Current	$ 36	$ 44
Deferred	50	42
Total Income Tax Provision	$ 86	$ 86
Effective Tax Rate	27.10%	25.80%
US
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2008
Equatorial Guinea
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2007
Israel
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2008
China
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination	2010