CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net earnings	$ 775,235us-gaap_NetIncomeLoss	$ 1,003,129us-gaap_NetIncomeLoss	$ 811,070us-gaap_NetIncomeLoss
Foreign currency translation adjustments [Abstract]
Foreign currency translation (losses) gains during period	(144,643)	34,617	38,880
Reclassification of foreign currency translation losses (gains) to earnings upon sale of subsidiaries	(6,300)	(29,881)	0
Total foreign currency translation, net of tax	(150,943)	4,736	38,880
Pension and other postretirement benefit plans [Abstract]
Actuarial gains (losses) arising during period	(60,766)	101,478	(56,159)
Prior service cost arising during period	(354)	(1,246)	(4,685)
Amortization of actuarial losses including in net periodic benefit cost	5,792	12,542	8,530
Amortization of prior service costs included in net periodic benefit cost	5,617	5,733	5,304
Pension and other postretirement benefit plans, net of tax	(49,711)	118,507	(47,010)
Changes in fair value of cash flow hedges [Abstract]
Unrealized net gains (losses) arising during period	(137)	35	482
Net (gains) losses reclassified into earnings, net of tax	(107)	(84)	(357)
Changes in fair value of cash flow hedges, net of tax	(244)	(49)	125
Other comprehensive income loss other adjustment, net of tax	939	(565)	609
Other comprehensive (loss) earnings, net of tax	(199,959)	122,629	(7,396)
Comprehensive earnings	$ 575,276us-gaap_ComprehensiveIncomeNetOfTax	$ 1,125,758us-gaap_ComprehensiveIncomeNetOfTax	$ 803,674us-gaap_ComprehensiveIncomeNetOfTax

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