CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE EARNINGS (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net earnings	$ 232,769	$ 176,279
Foreign currency translation adjustments [Abstract]
Foreign currency translation (losses) gains	(12,971)	(93,554)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	10,492	5,139
Total foreign currency translation adjustment	(12,971)	(93,554)
Pension and other postretirement benefit plans [Abstract]
Amortization of actuarial losses included in net periodic pension cost	2,374	1,669
Amortization of prior service cost included in net periodic pension cost	208	286
Pension and other postretirement benefit plans, tax	(773)	(568)
Total pension and other postretirement benefit plans	2,582	1,955
Changes in fair value of cash flow hedges [Abstract]
Unrealized net gains (losses) arising during period	4,324	(5,074)
Net losses (gains) reclassified into earnings	(1,411)	1,121
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	871	(1,121)
Total cash flow hedges	2,913	(3,953)
Other comprehensive (loss) earnings	(7,476)	(95,552)
Comprehensive earnings	$ 225,293	$ 80,727