CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE EARNINGS (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 332,396	$ 213,959	$ 541,906	$ 374,097
Foreign currency translation adjustments [Abstract]
Foreign currency translation gains (losses) during period	39,287	10,971	(44,542)	(6,402)
Reclassification of foreign currency translation losses to earnings upon sale of subsidiaries	(2,837)	0	(3,117)	0
Total foreign currency translation	36,450	10,971	(47,659)	(6,402)
Pension and other postretirement benefit plans [Abstract]
Amortization of actuarial losses included in net periodic pension cost	2,590	1,443	5,188	2,885
Amortization of prior service cost included in net periodic pension cost	1,227	1,392	2,455	2,784
Total pension and other postretirement benefit plans	3,817	2,835	7,643	5,669
Changes in fair value of cash flow hedges [Abstract]
Unrealized net (losses) gains arising during period	(807)	79	351	(395)
Net (gains) losses reclassified into earnings	570	(50)	471	(189)
Total cash flow hedges	(237)	29	822	(584)
Other comprehensive earnings (loss) other adjustment	277	745	491	619
Other comprehensive earnings (loss)	40,307	14,580	(38,703)	(698)
Comprehensive earnings	$ 372,703	$ 228,539	$ 503,203	$ 373,399