Derivative Instruments and Hedging Activities (Details 3) (Foreign Exchange Contract [Member], USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Foreign Exchange Contract [Member]
Effect of derivative instruments in cash flow hedging relationships on income and other comprehensive income (OCI)
Gain (loss) recognized in OCI	$ 105	$ (264)	$ 296	$ (422)