Share-Based Compensation Plans (Schedule Of Compensation Expense) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in Operating earnings	$ 184	$ 168	$ 144
Tax benefit	62	51	43
Share-based compensation expense, net of tax	122	117	101
Decrease in basic earnings per share	$ (0.42)	$ (0.34)	$ (0.30)
Decrease in diluted earnings per share	$ (0.41)	$ (0.34)	$ (0.30)
Share-based compensation expense in discontinued operations	0	13	164
Cost Of Sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in Operating earnings	25	20	19
Selling, General And Administrative Expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in Operating earnings	112	112	82
Research And Development Expenditures
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense included in Operating earnings	$ 47	$ 36	$ 43