Other Comprehensive Earnings (Components Of Other Comprehensive Earnings) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Foreign currency translation:
Beginning accumulated foreign currency translation		$ 424	$ 983	$ 1,448
Change in cumulative translation adjustment		45	(621)	(499)
Income tax benefit (expense)		(13)	62	34
Ending accumulated foreign currency translation		456	424	983
Pension and postretirement benefit plans:
Beginning accumulated pension and postretirement benefits		(194)	(204)	(180)
Net actuarial loss and prior service cost arising in current year		(28)	(5)	(57)
Recognition of net actuarial loss and prior service cost in earnings	[1]	26	21	20
Curtailment and settlement of pension benefits		24
Income tax benefit (expense)			(6)	13
Ending accumulated pension and postretirement benefits		(172)	(194)	(204)
Accumulated other comprehensive earnings, net of tax		$ 284	$ 230	$ 779

[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 16 for additional details.