Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
Income Statement [Abstract]
Net sales	$ 1,110,818	$ 702,909
Cost of goods sold	891,444	589,551
Gross margin	219,374	113,358
Selling, general and administrative expense	95,851	82,196
Impairment of long-lived assets	0	9,924
Restructuring and other (income) expense, net	(12,274)	1,848
Incremental expenses related to Nikola gains	0	49,511
Operating income (loss)	135,797	(30,121)
Other income (expense):
Miscellaneous income, net	630	452
Interest expense	(7,718)	(7,590)
Equity in net income of unconsolidated affiliates	52,916	23,634
Gains on investment in Nikola	0	796,141
Earnings before income taxes	181,625	782,516
Income tax expense	40,150	163,778
Net earnings	141,475	618,738
Net earnings attributable to noncontrolling interests	8,984	2,063
Net earnings attributable to controlling interest	$ 132,491	$ 616,675
Basic
Weighted average common shares outstanding	50,852	54,070
Earnings per share attributable to controlling interest	$ 2.61	$ 11.41
Diluted
Weighted average common shares outstanding	51,865	54,942
Earnings per share attributable to controlling interest	$ 2.55	$ 11.22
Common shares outstanding at end of period	50,438	53,362
Cash dividends declared per share	$ 0.28	$ 0.25