Restructuring Costs (Schedule Of The Activity And Balances Associated With Restructuring Liabilities) (Details) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Other Current Liabilities [Member] | Continuing Operations [Member]
Balance	$ 31	$ 61
Cash severance settled	(16)	(5)
Lease obligations settled	(1)
Lease obligations revision	(1)
Cash severance revision	1	(5)
Balance	14	51
Other Current Liabilities [Member] | Discontinued Operations [Member]
Balance	16	23
Cash severance settled	(4)	(1)
Cash severance revision	(2)	(3)
Balance	10	19
Other Long-Term Liabilities [Member] | Continuing Operations [Member]
Balance	51
Lease obligations settled	(7)
Lease obligations revision	(1)
Balance	43
Other Long-Term Liabilities [Member] | Discontinued Operations [Member]
Balance
Cash severance settled
Lease obligations settled
Lease obligations revision
Cash severance revision
Balance
Continuing Operations [Member]
Balance	82	61
Cash severance settled	(16)	(5)
Lease obligations settled	(8)
Lease obligations revision	(2)
Cash severance revision	1	(5)
Balance	57	51
Discontinued Operations [Member]
Balance	16	23
Cash severance settled	(4)	(1)
Cash severance revision	(2)	(3)
Balance	$ 10	$ 19