Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021
Income Statement [Abstract]
Net sales	$ 1,378,235	$ 759,109	$ 3,721,914	$ 2,193,110
Cost of goods sold	1,235,107	595,011	3,174,821	1,780,180
Gross margin	143,128	164,098	547,093	412,930
Selling, general and administrative expense	102,945	86,895	294,926	251,220
Impairment of long-lived assets	3,076	0	3,076	13,739
Restructuring and other (income) expense, net	(504)	28,212	(14,782)	37,656
Incremental expenses related to Nikola gains	0	(781)	0	53,300
Operating income	37,611	49,772	263,873	57,015
Other income (expense):
Miscellaneous income, net	393	539	2,063	1,366
Interest expense	(8,140)	(7,558)	(23,170)	(22,696)
Equity in net income of unconsolidated affiliates	47,466	31,674	160,600	80,939
Gains on investment in Nikola	0	2,740	0	655,102
Earnings before income taxes	77,330	77,167	403,366	771,726
Income tax expense	18,683	4,485	90,059	148,818
Net earnings	58,647	72,682	313,307	622,908
Net earnings attributable to noncontrolling interests	2,305	5,073	14,173	12,668
Net earnings attributable to controlling interest	$ 56,342	$ 67,609	$ 299,134	$ 610,240
Basic
Weighted average common shares outstanding	49,749	52,149	50,331	53,076
Earnings per share attributable to controlling interest	$ 1.13	$ 1.30	$ 5.94	$ 11.50
Diluted
Weighted average common shares outstanding	50,641	53,217	51,275	54,077
Earnings per share attributable to controlling interest	$ 1.11	$ 1.27	$ 5.83	$ 11.28
Common shares outstanding at end of period	49,364	51,813	49,364	51,813
Cash dividends declared per share	$ 0.28	$ 0.25	$ 0.84	$ 0.75