Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Current	$ 53	$ 37	$ 161	$ 138
Deferred	63	74	169	174
Total Income Tax Provision	116	111	330	312
Increase (Decrease) in Foreign Tax Credit Valuation Allowance	(25)			32
Income Tax Expense Associated with Uncertain Tax Positions		$ 10
Income Tax Examination [Line Items]
Effective Tax Rate	37.20%	40.40%	29.60%	31.20%
US
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination			2010
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
Effective Tax Rate	26.50%	25.00%
China
Income Tax Examination [Line Items]
Income Tax Examination, Year under Examination			2010