Income Taxes (Income before Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Expense (Benefit) [Abstract]
United States	$ 1,317	$ 1,609	$ 1,643
Other countries	866	941	933
Income Before Income Taxes, Equity Interests	$ 2,183	$ 2,550	$ 2,576