Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		May 31, 2021	May 31, 2020	May 31, 2019
Cash Flows From Operating Activities:
Net Income		$ 503,500	$ 305,082	$ 267,687
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation & Amortization		146,857	156,842	141,742
Restructuring charges, net of payments		(2,909)	6,831	8,072
Goodwill, intangible and other asset impairments				4,190
Fair value adjustments to contingent earnout obligations		(582)	680	1,918
Deferred income taxes		20,188	(12,150)	5,434
Stock-based compensation expense		40,926	19,789	31,154
Other non-cash interest expense				1,552
Realized/unrealized losses (gains) on sales of marketable securities		(38,774)	(1,132)	7,613
Loss on extinguishment of debt	[1]			3,051
Other		(2,340)	(77)	(3,288)
Changes in assets and liabilities, net of effect from purchases and sales of businesses:
(Increase) decrease in receivables		(88,618)	82,060	(131,204)
(Increase) decrease in inventory		(68,802)	21,309	(16,829)
(Increase) decrease in prepaid expenses and other current and long-term assets		(11,457)	17,614	(14,826)
Increase (decrease) in accounts payable		151,388	(27,111)	(29,628)
Increase (decrease) in accrued compensation and benefits		62,966	(6,198)	19,241
Increase (decrease) in accrued losses		8,510	487	(1,803)
Increase (decrease) in other accrued liabilities		43,010	(23,665)	(5,232)
Other		2,293	9,558	4,097
Cash Provided By Operating Activities		766,156	549,919	292,941
Cash Flows From Investing Activities:
Capital expenditures		(157,199)	(147,756)	(136,757)
Acquisition of businesses, net of cash acquired		(165,223)	(65,102)	(168,205)
Purchase of marketable securities		(121,669)	(28,891)	(19,787)
Proceeds from sales of marketable securities		112,298	31,337	69,743
Other		5,405	799	6,760
Cash (Used For) Investing Activities		(326,388)	(209,613)	(248,246)
Cash Flows From Financing Activities:
Additions to long-term and short-term debt			485,306	628,083
Reductions of long-term and short-term debt		(188,278)	(471,035)	(273,109)
Cash dividends		(194,720)	(185,101)	(181,409)
Repurchase of common stock		(49,956)	(125,000)	(200,222)
Shares of common stock returned for taxes		(22,826)	(18,075)	(21,758)
Payments of acquisition-related contingent consideration		(2,218)	(606)	(4,066)
Other		(1,621)	(2,359)	(1,361)
Cash (Used For) Financing Activities		(459,619)	(316,870)	(53,842)
Effect of Exchange Rate Changes on Cash and Cash Equivalents		33,139	(13,188)	(12,107)
Net Change in Cash and Cash Equivalents		13,288	10,248	(21,254)
Cash and Cash Equivalents at Beginning of Period		233,416	223,168	244,422
Cash and Cash Equivalents at End of Period		246,704	233,416	223,168
Cash paid during the year for:
Interest		82,440	103,143	101,415
Income taxes, net of refunds		$ 147,436	$ 102,892	68,357
Supplemental Disclosures of Non-Cash Investing and Financing Activities:
Conversion of Debt to Equity				$ 38,239

[1] In connection with the redemption of all of our outstanding 2.25% convertible senior notes in November 2018, we recognized a loss of $3.1 million, due to the fair value remeasurement on the date of conversion