Other Comprehensive Earnings (Components Of Other Comprehensive Earnings) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Foreign currency translation and other:
Beginning accumulated foreign currency translation and other		$ 1,226	$ 1,215		$ 1,658
Change in cumulative translation adjustment and other		113	22		(490)
Income tax benefit (expense)		(30)	(11)		47
Ending accumulated foreign currency translation and other		1,309	1,226		1,215
Pension and postretirement benefit plans:
Beginning accumulated pension and postretirement benefits		(172)	(194)		(204)
Net actuarial loss and prior service cost arising in current year		10	(28)		(5)
Recognition of net actuarial loss and prior service cost in earnings	[1]	19	26		21
Curtailment and settlement of pension benefits			24
Income tax expense					(6)
Ending accumulated pension and postretirement benefits		(143)	(172)		(194)
Accumulated other comprehensive earnings, net of tax		$ 1,166	$ 1,054	[2]	$ 1,021

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

[2] Prior year amounts have been recast due to change in accounting principle. See Note 2 in “Item 8. Financial Statements and Supplementary Data” of this report.