Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021
Operating activities:
Net earnings	$ 58,647	$ 72,682	$ 313,307	$ 622,908
Adjustments to reconcile net earnings to net cash provided (used) by operating activities:
Depreciation and amortization	27,425	21,893	70,579	65,664
Impairment of long-lived assets	3,076	0	3,076	13,739
Provision for (benefit from) deferred income taxes	10,661	(30,129)	13,336	9,126
Bad debt expense (income)	382	(95)	896	(160)
Equity in net income of unconsolidated affiliates, net of distributions	(18,604)	(13,288)	(83,096)	(15,437)
Net (gain) loss on sale of assets	(628)	27,641	(13,830)	35,314
Stock-based compensation	4,408	4,727	11,959	14,437
Gains on investment in Nikola	0	(2,740)	0	(655,102)
Charitable contribution of Nikola shares	0	0	0	20,653
Changes in assets and liabilities, net of impact of acquisitions:
Receivables	(33,766)	(32,105)	(155,451)	(110,719)
Inventories	31,051	(96,836)	(229,813)	(6,591)
Accounts payable	51,893	62,299	50,967	157,629
Accrued compensation and employee benefits	(21,105)	10,779	(52,924)	48,591
Income taxes payable	(14,422)	(2,474)	(1,487)	36,567
Other operating items, net	(24,828)	(13,098)	(22,245)	(2,547)
Net cash provided (used) by operating activities	74,190	9,256	(94,726)	234,072
Investing activities:
Investment in property, plant and equipment	(23,645)	(16,377)	(71,804)	(65,321)
Acquisitions, net of cash acquired	(269,511)	(129,743)	(377,261)	(129,818)
Proceeds from sale of assets, net	4,083	(985)	35,904	20,595
Proceeds from sale of Nikola shares	0	146,590	0	634,449
Net cash provided (used) by investing activities	(289,073)	(515)	(413,161)	459,905
Financing activities:
Net proceeds from short-term borrowings, net of issuance costs	105,638	0	105,638	0
Principal payments on long-term obligations and debt redemption costs	(152)	(99)	(554)	(292)
Proceeds from issuance of common shares, net of tax withholdings	269	565	(6,516)	1,709
Payments to noncontrolling interests	(3,360)	(7,250)	(15,436)	(7,810)
Repurchase of common shares	(54,255)	(52,367)	(127,842)	(145,250)
Dividends paid	(14,127)	(13,215)	(43,390)	(40,027)
Net cash provided (used) by financing activities	34,013	(72,366)	(88,100)	(191,670)
Increase (decrease) in cash and cash equivalents	(180,870)	(63,625)	(595,987)	502,307
Cash and cash equivalents at beginning of period	225,194	713,130	640,311	147,198
Cash and cash equivalents at end of period	$ 44,324	$ 649,505	$ 44,324	$ 649,505