Income Taxes (Schedule Of Tax Effects Of Temporary Differences And Carryforwards Of The Deferred Tax Assets And Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Loss and tax credit carryforwards	$ 2,039	$ 2,253
Capitalized research and development	47	61
Asset impairments and restructuring reserves	162	164
Postretirement medical and life benefits	347	349
Inventory	44	60
Fixed assets	78	7
Other accrued liabilities	241	248
Other employee benefits	398	324
Gross deferred tax assets	3,356	3,466
Valuation allowance	(219)	(214)
Total deferred tax assets	3,137	3,252
Intangible and other assets	(97)	(88)
Total deferred tax liabilities	(97)	(88)
Net deferred tax assets	$ 3,040	$ 3,164