Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Current	$ 71	$ 56	$ 108	$ 100
Deferred	57	59	106	100
Total Income Tax Provision	$ 128	$ 115	$ 214	$ 200
Effective Tax Rate	26.40%	29.50%	26.60%	27.60%
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			2008
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