Other Comprehensive Earnings (Components Of Other Comprehensive Earnings) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Foreign currency translation and other:
Beginning accumulated foreign currency translation and other		$ 1,309	$ 1,226
Change in cumulative translation adjustment and other		(61)	11
Income tax benefit (expense)		13	(3)
Ending accumulated foreign currency translation and other		1,261	1,234
Pension and postretirement benefit plans:
Beginning accumulated pension and postretirement benefits		(143)	(172)
Recognition of net actuarial loss and prior service cost in earnings	[1]	4	5
Ending accumulated pension and postretirement benefits		(139)	(167)
Accumulated other comprehensive earnings, net of tax		$ 1,122	$ 1,067	$ 1,166

[1] These accumulated other comprehensive earnings components are included in the computation of net periodic benefit cost, which is a component of Other expenses in the accompanying consolidated comprehensive statements of earnings. See Note 18 for additional details.