Consolidated Condensed Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock and Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock
Beginning balance (in shares) at May. 31, 2022		190,838,000
Beginning balance at May. 31, 2022	$ 3,308,196	$ 1,771,917	$ 8,719,163	$ 107,917	$ (7,290,801)
Beginning balance (in shares) at May. 31, 2022					(89,127,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	351,689		351,689
Comprehensive (loss) income, net of tax	(19,793)			(19,793)
Dividends	(117,461)		(117,461)
Stock-based compensation	26,282	$ 26,282
Vesting of stock-based compensation awards (in shares)		273,000
Stock options exercised (in shares)		543,000			(193,000)
Stock options exercised	1,047	$ 80,638			$ (79,591)
Repurchase of common stock (in shares)					(802,000)
Repurchase of common stock	(320,334)				$ (320,334)
Ending balance (in shares) at Aug. 31, 2022		191,654,000
Ending balance at Aug. 31, 2022	$ 3,229,626	$ 1,878,837	8,953,391	88,124	$ (7,690,726)
Ending balance (in shares) at Aug. 31, 2022					(90,122,000)
Beginning balance (in shares) at May. 31, 2023	192,198,938	192,199,000
Beginning balance at May. 31, 2023	$ 3,863,986	$ 2,031,542	9,597,315	77,778	$ (7,842,649)
Beginning balance (in shares) at May. 31, 2023	(90,466,790)				(90,467,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 385,085		385,085
Comprehensive (loss) income, net of tax	9,391			9,391
Dividends	(138,272)		(138,272)
Stock-based compensation	30,242	$ 30,242
Vesting of stock-based compensation awards (in shares)		156,000
Stock options exercised (in shares)		303,000			(118,000)
Stock options exercised	479	$ 59,691			$ (59,212)
Repurchase of common stock (in shares)					(145,000)
Repurchase of common stock	$ (73,276)				$ (73,276)
Ending balance (in shares) at Aug. 31, 2023	192,657,768	192,658,000
Ending balance at Aug. 31, 2023	$ 4,077,635	$ 2,121,475	$ 9,844,128	$ 87,169	$ (7,975,137)
Ending balance (in shares) at Aug. 31, 2023	(90,730,306)				(90,730,000)