Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Cash Flows From Operating Activities:
Net Income	$ 479,731,000	$ 492,466,000	$ 503,500,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	154,949,000	153,074,000	146,857,000
Restructuring charges, net of payments		(2,516,000)	(2,909,000)
Goodwill impairment	36,745,000	0	0
Fair value adjustments to contingent earnout obligations		3,253,000	(582,000)
Deferred income taxes	6,236,000	(25,067,000)	20,188,000
Stock-based compensation expense	28,673,000	40,114,000	40,926,000
Net loss (gain) on marketable securities	2,086,000	17,706,000	(38,774,000)
Net (gain) on sales of assets and a business	(28,632,000)	(51,983,000)
Other	1,683,000	(66,000)	(2,340,000)
Changes in assets and liabilities, net of effect from purchases and sales of businesses:
(Increase) in receivables	(94,585,000)	(187,299,000)	(88,618,000)
Decrease (increase) in inventory	66,805,000	(304,197,000)	(68,802,000)
Decrease (increase) in prepaid expenses and other current and long-term assets	1,364,000	(13,040,000)	(11,457,000)
(Decrease) increase in accounts payable	(116,053,000)	101,223,000	151,388,000
(Decrease) increase in accrued compensation and benefits	(2,643,000)	9,737,000	62,966,000
Increase (decrease) in accrued losses	2,231,000	(3,956,000)	8,510,000
Increase (decrease) in other accrued liabilities	38,515,000	(50,718,000)	43,010,000
Other			2,293,000
Cash Provided By Operating Activities	577,105,000	178,731,000	766,156,000
Cash Flows From Investing Activities:
Capital expenditures	(254,435,000)	(222,403,000)	(157,199,000)
Acquisition of businesses, net of cash acquired	(47,542,000)	(127,457,000)	(165,223,000)
Purchase of marketable securities	(18,674,000)	(15,032,000)	(121,669,000)
Proceeds from sales of marketable securities	12,731,000	21,533,000	112,298,000
Proceeds from sales of assets and a business	58,288,000	76,590,000
Other	(72,000)	7,222,000	5,405,000
Cash (Used For) Investing Activities	(249,704,000)	(259,547,000)	(326,388,000)
Cash Flows From Financing Activities:
Additions to long-term and short-term debt	341,720,000	437,564,000
Reductions of long-term and short-term debt	(355,463,000)	(101,505,000)	(188,278,000)
Cash dividends	(213,912,000)	(204,394,000)	(194,720,000)
Repurchase of common stock	(50,000,000)	(52,500,000)	(49,956,000)
Shares of common stock returned for taxes	(17,047,000)	(11,549,000)	(22,826,000)
Payments of acquisition-related contingent consideration	(3,765,000)	(5,774,000)	(2,218,000)
Other	(2,689,000)	(4,452,000)	(1,621,000)
Cash (Used For) Provided By Financing Activities	(301,156,000)	57,390,000	(459,619,000)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(12,130,000)	(21,606,000)	33,139,000
Net Change in Cash and Cash Equivalents	14,115,000	(45,032,000)	13,288,000
Cash and Cash Equivalents at Beginning of Period	201,672,000	246,704,000	233,416,000
Cash and Cash Equivalents at End of Period	215,787,000	201,672,000	246,704,000
Cash paid during the year for:
Interest	113,953,000	81,838,000	82,440,000
Income taxes, net of refunds	134,436,000	172,254,000	147,436,000
Supplemental Disclosures of Non-Cash Investing and Financing Activities:
Capital expenditures accrued within accounts payable at year-end	$ 34,470,000	$ 27,237,000	$ 29,848,000