Other Comprehensive Earnings (Components Of Other Comprehensive Earnings) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Foreign currency translation:
Beginning accumulated foreign currency translation	$ 983		$ 1,448
Change in cumulative translation adjustment	(337)		(313)
Income tax benefit (expense)	35		15
Ending accumulated foreign currency translation	681		1,150
Pension and postretirement benefit plans:
Beginning accumulated pension and postretirement benefits	(204)		(180)
Recognition of net actuarial loss and prior service cost in earnings	6	[1]	5	[1]
Income tax benefit (expense)	(2)		(2)
Ending accumulated pension and postretirement benefits	(200)		(177)
Accumulated other comprehensive earnings, net of tax	$ 481		$ 973		$ 779

[1] These accumulated other comprehensive earnings components are included in the computation of net periodic benefit cost, which is a component of general and administrative expenses on the accompanying consolidated comprehensive statements of earnings. See Note 14 for additional details.