Acquisition and Restructuring Costs (Costs Related To Acquisition And Restructuring) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Other Expenses [Abstract]
Acquisition Costs, Period Cost	$ 13	$ 19	$ 41	$ 46
Restructuring charges, net	15	66	45	75
Total Of Acquisition And Restructuring Costs	$ 28	$ 85	$ 86	$ 121