Restructuring Costs (Schedule Of The Components Of Restructuring Costs Included In The Consolidated Statements Of Operations) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended		21 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011
Cash severance					$ 204
Restructuring costs	(2)	(13)	(1)	(13)
Cash Severance [Member]
Cash severance	(7)	(8)	(1)	(8)
Cash Severance [Member] | Continuing Operations [Member]
Cash severance	1	(5)	1	(5)
Cash Severance [Member] | Discontinued Operations [Member]
Cash severance	(8)	(3)	(2)	(3)
Asset Impairments [Member]
Restructuring costs	2		2
Asset Impairments [Member] | Continuing Operations [Member]
Restructuring costs	2		2
Share-Based Awards [Member]
Restructuring costs		(6)	(1)	(6)
Share-Based Awards [Member] | Continuing Operations [Member]
Restructuring costs		(4)	(1)	(4)
Share-Based Awards [Member] | Discontinued Operations [Member]
Restructuring costs		(2)		(2)
Lease Obligations [Member]
Restructuring costs	2		(2)
Lease Obligations [Member] | Continuing Operations [Member]
Restructuring costs	2		(2)
Other [Member]
Restructuring costs	1	1	1	1
Other [Member] | Continuing Operations [Member]
Restructuring costs	1	1	1	1
Continuing Operations [Member]
Restructuring costs	6	(8)	1	(8)
Discontinued Operations [Member]
Restructuring costs	$ (8)	$ (5)	$ (2)	$ (5)