CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE EARNINGS (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 130,084	$ 186,098	$ 347,730	$ 728,004
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	3,788,900		3,788,900
Foreign currency translation adjustments [Abstract]
Foreign currency translation gains (losses) during period	11,489	(57,213)	(21,734)	(101,755)
Reclassification of foreign currency translation gains to earnings upon sale of subsidiaries	0	0	0	(3,117)
Total foreign currency translation	11,489	(57,213)	(21,734)	(104,872)
Pension and other postretirement benefit plans [Abstract]
Amortization of actuarial losses included in net periodic pension cost	1,413	2,575	4,238	7,763
Amortization of prior service cost included in net periodic pension cost	1,040	1,227	3,121	3,682
Total pension and other postretirement benefit plans	2,453	3,802	7,359	11,445
Changes in fair value of cash flow hedges [Abstract]
Unrealized net (losses) gains arising during period	(282)	185	(493)	536
Net (losses) gains reclassified into earnings	(36)	(678)	131	(207)
Total cash flow hedges	(318)	(493)	(362)	329
Other comprehensive earnings other adjustment	240	393	1,632	884
Other comprehensive earnings (loss)	13,864	(53,511)	(13,105)	(92,214)
Comprehensive earnings	$ 143,948	$ 132,587	$ 334,625	$ 635,790