CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE EARNINGS (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 118,290	$ 332,396	$ 217,646	$ 541,906
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	3,713,735		3,713,735
Foreign currency translation adjustments [Abstract]
Foreign currency translation (losses) gains during period	(41,992)	39,287	(33,223)	(44,542)
Reclassification of foreign currency translation gains to earnings upon sale of subsidiaries	0	(2,837)	0	(3,117)
Total foreign currency translation	(41,992)	36,450	(33,223)	(47,659)
Pension and other postretirement benefit plans [Abstract]
Amortization of actuarial losses included in net periodic pension cost	1,416	2,590	2,825	5,188
Amortization of prior service cost included in net periodic pension cost	1,040	1,227	2,081	2,455
Total pension and other postretirement benefit plans	2,456	3,817	4,906	7,643
Changes in fair value of cash flow hedges [Abstract]
Unrealized net (losses) gains arising during period	(162)	(807)	(211)	351
Net losses reclassified into earnings	213	570	166	471
Total cash flow hedges	51	(237)	(45)	822
Other comprehensive earnings other adjustment	(448)	277	1,392	491
Other comprehensive earnings (loss)	(39,933)	40,307	(26,970)	(38,703)
Comprehensive earnings	$ 78,357	$ 372,703	$ 190,676	$ 503,203