CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,003,129	$ 811,070	$ 895,243
Foreign currency translation adjustments [Abstract]
Foreign currency translation (losses) gains during period	34,617	38,880	(71,612)
Reclassification of foreign currency translation losses (gains) to earnings upon sale of subsidiaries	(29,881)	0	11,090
Total foreign currency translation, net of tax	4,736	38,880	(60,522)
Pension and other postretirement benefit plans [Abstract]
Actuarial gains (losses) arising during period	101,478	(56,159)	(46,284)
Prior service cost arising during period	(1,246)	(4,685)	(1,067)
Amortization of actuarial losses including in net periodic benefit cost	12,542	8,530	5,646
Amortization of prior service costs included in net periodic benefit cost	5,733	5,304	5,390
Pension and other postretirement benefit plans, net of tax	118,507	(47,010)	(36,315)
Changes in fair value of cash flow hedges [Abstract]
Unrealized net gains (losses) arising during period	35	482	(948)
Net (gains) losses reclassified into earnings, net of tax	(84)	(357)	(124)
Changes in fair value of cash flow hedges, net of tax	(49)	125	(1,072)
Other comprehensive income loss other adjustment, net of tax	(565)	609	238
Other comprehensive earnings, net of tax	122,629	(7,396)	(97,671)
Comprehensive earnings	$ 1,125,758	$ 803,674	$ 797,572