Income Taxes (Details Textuals) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Taxes (Textuals) [Abstract]
Unrecognized tax benefits as a result of potential resolutions of prior years' tax	$ 846		$ 846
Unrecognized tax benefits, amounts recorded to equity	621		621
Unrecognized tax benefits impact not possible to quantify	225		225
Open tax years by major tax jurisdiction			2005 through 2007
Tax benefit due to foreign tax credits	81		131
Tax Benefits				$ 102
Effective tax rate	28.70%	26.60%	28.90%	29.30%