CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE EARNINGS (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net earnings	$ 176,279	$ 105,705
Foreign currency translation adjustments [Abstract]
Foreign currency translation (losses) gains	(93,554)	23,700
Reclassification of foreign currency translation losses to earnings	0	25,339
Total foreign currency translation adjustment	(93,554)	49,039
Pension and other postretirement benefit plans [Abstract]
Amortization of actuarial losses included in net periodic pension cost	1,669	175
Amortization of prior service cost included in net periodic pension cost	286	572
Total pension and other postretirement benefit plans	1,955	747
Changes in fair value of cash flow hedges [Abstract]
Unrealized net gains (losses) arising during period	(5,074)	2,594
Net losses (gains) reclassified into earnings	1,121	(230)
Total cash flow hedges	(3,953)	2,364
Other comprehensive (loss) earnings	(95,552)	52,150
Comprehensive earnings	$ 80,727	$ 157,855