Other Comprehensive Earnings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Foreign currency translation adjustments [Abstract]
Foreign Currency Transaction and Translation Adjustment, before Tax	$ 60,802	$ 82,694	$ 22,510	$ 34,181
Foreign Currency Translation Adjustment, Tax	998	108	0	(262)
Total foreign currency translation	61,800	82,802	22,510	33,919
Pension and other postretirement benefit plans [Abstract]
Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	129,959	16,268	146,170	9,952
Pension and Other Postretirement Benefit Plans, Tax	(45,452)	(5,693)	(51,059)	(3,637)
Total pension and other postretirement benefit plans	84,507	10,575	95,111	6,315
Changes in fair value of cash flow hedges [Abstract]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	(453)	298	(174)	675
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	158	(104)	61	(236)
Total cash flow hedges	(295)	194	(113)	439
Other Comprehensive Income Other Adjustment Net Of Tax [Abstract]
Other Comprehensive Income Loss Adjustment Before Tax	132	(261)	319	318
Other Comprehensive Income Loss Other Adjustment Tax	(17)	(29)	(39)	(55)
Other comprehensive income loss other adjustment, net of tax	115	(290)	280	263
Total other comprehensive earnings [Abstract]
Other Comprehensive Income (Loss), before Tax	190,440	98,999	168,825	45,126
Other Comprehensive Income (Loss), Tax	(44,313)	(5,718)	(51,037)	(4,190)
Other comprehensive earnings, net of tax	146,127	93,281	117,788	40,936
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	269,114	241,046	809,166	651,210
Other comprehensive earnings, net of tax	146,127	93,281	117,788	40,936
Comprehensive earnings	415,241	334,327	926,954	692,146
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Pension And Other Postretirement Benefit Plans Net Of Tax Abstract [Abstract]
Amortization of actuarial losses	4,143	10,225	15,997	10,225
Amortization of prior service costs	(2,225)	(6,043)	(6,582)	(6,043)
Total before tax	6,368	16,268	22,579	16,268
Tax provision	(2,195)	(5,693)	(7,802)	(5,693)
Net of tax	4,173	10,575	14,777	10,575
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Derivatives Net of Tax [Abstract]
Cash flow hedges	(617)	47	(481)	91
Tax provision	216	(17)	168	(32)
Net of tax	$ (401)	$ 30	$ (313)	$ 59