Restructuring (Narrative) (Details) (USD $) In Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011
Restructuring	$ 7	$ 6
Cash payments		(11)
Remaining liability of restructuring expenses		2
Restructuring Plan 2010 [Member]
Cash payments		7
Total restructuring costs under the plan		16
Restructuring Plan 2010 [Member] | Facility-Related [Member]
Restructuring liability expected to be paid		9
Restructuring Plan 2010 [Member] | Personnel-Related [Member]
Restructuring liability expected to be paid		2
Restructuring Plan 2008 [Member]
Cash payments		4
Total restructuring costs under the plan		124
Restructuring Plan 2008 [Member] | Facility-Related [Member]
Restructuring liability expected to be paid		6
Previously recorded facility-related restructuring expenses		1
Facility-Related [Member]
Cash payments		(4)
Remaining liability of restructuring expenses		2
Personnel-Related [Member]
Cash payments		$ (7)