Acquisition and Restructuring Costs (Costs Related To Acquisition And Restructuring) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other Expenses [Abstract]
Acquisition costs, net	$ 26	$ 16	$ 96
Restructuring charges, net	199	253	156
Total acquisition and restructuring costs	$ 225	$ 269	$ 252