Restructuring (Activity Related To The Restructuring Costs) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Restructuring Cost and Reserve [Roll Forward]
Liability as of December 31, 2012	$ 11
Restructuring Charges	3
Cash payments	(6)
Liability as of March 31, 2013	8
Facility-Related [Member]
Restructuring Cost and Reserve [Roll Forward]
Liability as of December 31, 2012	5
Restructuring Charges	4
Cash payments	(3)
Liability as of March 31, 2013	6
Personnel-Related [Member]
Restructuring Cost and Reserve [Roll Forward]
Liability as of December 31, 2012	6
Restructuring Charges	(1)
Cash payments	(3)
Liability as of March 31, 2013	$ 2