Income Taxes (Components Of Deferred Tax Assets And Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Inventory	$ 38	$ 114
Accrued liabilities and allowances	254	231
Employee benefits	1,279	1,083
Capitalized items	290	386
Tax basis differences on investments	44	40
Depreciation tax basis differences on fixed assets	13	66
Undistributed non-U.S. earnings	(275)	(481)
Tax carryforwards	1,438	1,617
Business reorganization	13	24
Warranty and customer reserves	44	56
Deferred revenue and costs	218	242
Valuation allowances	(366)	(502)
Deferred charges	39	37
Other	(46)	(124)
Deferred tax assets (liabilities), total	$ 2,983	$ 2,789