Other Comprehensive Earnings (Components Of Other Comprehensive Earnings) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Foreign currency translation:
Beginning accumulated foreign currency translation		$ 1,261	$ 1,234	$ 1,309	$ 1,226
Change in cumulative translation adjustment		(36)	39	(96)	50
Income tax benefit (expense)		2	(11)	14	(14)
Ending accumulated foreign currency translation		1,227	1,262	1,227	1,262
Pension and postretirement benefit plans:
Beginning accumulated pension and postretirement benefits		(139)	(167)	(143)	(172)
Recognition of net actuarial loss and prior service cost in earnings	[1]	3	4	7	9
Ending accumulated pension and postretirement benefits		(136)	(163)	(136)	(163)
Accumulated other comprehensive earnings, net of tax		$ 1,091	$ 1,099	$ 1,091	$ 1,099	$ 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 17 for additional details.