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, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based plans expense	$ 195	$ 206	$ 193
Income tax benefit	70	76	75
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based plans expense	62	93	85
Restricted Stock Units and Other Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based plans expense	$ 133	$ 113	$ 108