Provision for Income Taxes (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Provision for Income Taxes [Abstract]
(Benefit) provision for income taxes	$ 109	$ (39)	$ 727	$ 811
Tax expense (benefit) primarily associated with the company's policy of hedging the foreign currency-denominated monetary assets and liabilities	41	(157)	(101)	54
Tax expense (benefit) related to settlements of prior year tax contingencies				$ (49)