CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net earnings	$ 869,829	$ 775,235	$ 1,003,129
Foreign currency translation adjustments [Abstract]
Foreign currency translation (losses) gains during period	(117,302)	(144,643)	34,617
Reclassification of foreign currency translation losses (gains) to earnings upon sale of subsidiaries	(3,092)	(6,300)	(29,881)
Total foreign currency translation, net of tax	(120,394)	(150,943)	4,736
Pension and other postretirement benefit plans [Abstract]
Actuarial gains (losses) arising during period	4,492	(60,766)	101,478
Prior service cost arising during period	4,171	(354)	(1,246)
Amortization of actuarial losses including in net periodic benefit cost	10,280	5,792	12,542
Amortization of prior service costs included in net periodic benefit cost	4,993	5,617	5,733
Pension and other postretirement benefit plans, net of tax	23,936	(49,711)	118,507
Changes in fair value of cash flow hedges [Abstract]
Unrealized net gains (losses) arising during period	(328)	(137)	35
Net (gains) losses reclassified into earnings, net of tax	(108)	(107)	(84)
Changes in fair value of cash flow hedges, net of tax	(436)	(244)	(49)
Other comprehensive income loss other adjustment, net of tax	1,252	939	(565)
Other comprehensive (loss) earnings, net of tax	(95,642)	(199,959)	122,629
Comprehensive earnings	$ 774,187	$ 575,276	$ 1,125,758