Share-Based Compensation And Other Compensation Arrangements (Schedule Of Share-Based Plans Expense And Related Income Tax Benefit) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based plans expense	$ 186	$ 215	$ 238
Income tax benefit	73	83	89
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based plans expense	88	96	111
Restricted Stock Units And Other Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based plans expense	98	83	56
ShareValue Trust [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based plans expense		$ 36	$ 71