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, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based plans expense	$ 193	$ 186	$ 215
Income tax benefit	75	73	83
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based plans expense	85	88	96
Restricted Stock Units and Other Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based plans expense	108	98	83
ShareValue Trust [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based plans expense			$ 36