Other Comprehensive Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Gain (loss) on euro net investment hedge, gross	$ 3,631	$ 31,846	$ 27,957	$ 35,188
Foreign currency translation adjustments [Abstract]
Foreign currency translation adjustments, before tax	(55,942)	(67,629)	(95,087)	(72,861)
Foreign currency translation adjustments, tax	(1,271)	(11,146)	(9,785)	(12,316)
Total foreign currency translation	(57,213)	(78,775)	(104,872)	(85,177)
Pension and other postretirement benefit plans [Abstract]
Pension and other postretirement benefit plans, before tax	5,753	4,298	17,316	12,978
Pension and other postretirement benefit plans, tax	(1,951)	(1,495)	(5,871)	(4,506)
Total pension and other postretirement benefit plans	3,802	2,803	11,445	8,472
Changes in fair value of cash flow hedges [Abstract]
Changes in fair value of cash flow hedges, before tax	(760)	(457)	505	(1,355)
Changes in fair value of cash flow hedges, tax	267	160	(176)	474
Total cash flow hedges	(493)	(297)	329	(881)
Other comprehensive earnings other adjustment, net of tax [Abstract]
Other, before tax	445	941	1,003	1,708
Other, tax	(52)	(14)	(119)	(162)
Other comprehensive earnings (loss) other adjustment	393	927	884	1,546
Total other comprehensive earnings [Abstract]
Other comprehensive earnings (loss), before Tax	(50,504)	(62,847)	(76,263)	(59,530)
Other comprehensive earnings (loss), tax	(3,007)	(12,495)	(15,951)	(16,510)
Other comprehensive earnings (loss), net of tax	(53,511)	(75,342)	(92,214)	(76,040)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	186,098	231,844	728,004	605,941
Other comprehensive earnings (loss)	(53,511)	(75,342)	(92,214)	(76,040)
Comprehensive earnings	132,587	156,502	635,790	529,901
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Pension And Other Postretirement Benefit Plans Net Of Tax Abstract [Abstract]
Amortization of actuarial losses	3,868	2,164	11,660	6,566
Amortization of prior service costs	1,885	2,134	5,656	6,412
Total before tax	5,753	4,298	17,316	12,978
Tax provision	(1,951)	(1,495)	(5,871)	(4,506)
Net of tax	3,802	2,803	11,445	8,472
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Derivatives Net of Tax [Abstract]
Cash flow hedges	(1,042)	261	(318)	(30)
Tax (provision) benefit	364	(92)	111	10
Net of tax	$ (678)	$ 169	$ (207)	$ (20)