CONSOLIDATED CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock and Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock
Beginning balance (in shares) at May. 31, 2023		768,796
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					(361,867)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	385,085		385,085
Comprehensive income (loss), 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)		625
Stock options exercised (in shares)		1,210			(472)
Stock options exercised	479	$ 59,691			$ (59,212)
Repurchase of common stock (in shares)					(582)
Repurchase of common stock	(73,276)				$ (73,276)
Ending balance (in shares) at Aug. 31, 2023		770,631
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					(362,921)
Beginning balance (in shares) at May. 31, 2023		768,796
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					(361,867)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	759,698
Comprehensive income (loss), net of tax	15,561
Ending balance (in shares) at Nov. 30, 2023		771,445
Ending balance at Nov. 30, 2023	3,994,481	$ 2,179,951	10,081,267	93,339	$ (8,360,076)
Ending balance (in shares) at Nov. 30, 2023					(366,055)
Beginning balance (in shares) at Aug. 31, 2023		770,631
Beginning balance at Aug. 31, 2023	4,077,635	$ 2,121,475	9,844,128	87,169	$ (7,975,137)
Beginning balance (in shares) at Aug. 31, 2023					(362,921)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	374,613		374,613
Comprehensive income (loss), net of tax	6,170			6,170
Dividends	(137,474)		(137,474)
Stock-based compensation	22,940	$ 22,940
Vesting of stock-based compensation awards (in shares)		14
Stock options exercised (in shares)		800			(273)
Stock options exercised	449	$ 35,536			$ (35,087)
Repurchase of common stock (in shares)					(2,861)
Repurchase of common stock	(349,852)				$ (349,852)
Ending balance (in shares) at Nov. 30, 2023		771,445
Ending balance at Nov. 30, 2023	$ 3,994,481	$ 2,179,951	10,081,267	93,339	$ (8,360,076)
Ending balance (in shares) at Nov. 30, 2023					(366,055)
Beginning balance (in shares) at May. 31, 2024	773,097	773,097
Beginning balance at May. 31, 2024	$ 4,316,372	$ 2,305,301	10,617,955	91,201	$ (8,698,085)
Beginning balance (in shares) at May. 31, 2024	(368,089)				(368,089)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 452,033		452,033
Comprehensive income (loss), net of tax	(7,823)			(7,823)
Dividends	(157,955)		(157,955)
Stock-based compensation	33,367	$ 33,367
Vesting of stock-based compensation awards (in shares)		792
Stock options exercised (in shares)		1,342			(407)
Stock options exercised	231	$ 77,055			$ (76,824)
Repurchase of common stock (in shares)					(3,476)
Repurchase of common stock	(614,802)				$ (614,802)
Ending balance (in shares) at Aug. 31, 2024		775,231
Ending balance at Aug. 31, 2024	$ 4,021,423	$ 2,415,723	10,912,033	83,378	$ (9,389,711)
Ending balance (in shares) at Aug. 31, 2024					(371,972)
Beginning balance (in shares) at May. 31, 2024	773,097	773,097
Beginning balance at May. 31, 2024	$ 4,316,372	$ 2,305,301	10,617,955	91,201	$ (8,698,085)
Beginning balance (in shares) at May. 31, 2024	(368,089)				(368,089)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 900,528
Comprehensive income (loss), net of tax	$ (22,676)
Ending balance (in shares) at Nov. 30, 2024	775,764	775,764
Ending balance at Nov. 30, 2024	$ 4,293,106	$ 2,474,313	11,202,524	68,525	$ (9,452,256)
Ending balance (in shares) at Nov. 30, 2024	(372,268)				(372,268)
Beginning balance (in shares) at Aug. 31, 2024		775,231
Beginning balance at Aug. 31, 2024	$ 4,021,423	$ 2,415,723	10,912,033	83,378	$ (9,389,711)
Beginning balance (in shares) at Aug. 31, 2024					(371,972)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	448,495		448,495
Comprehensive income (loss), net of tax	(14,853)			(14,853)
Dividends	(158,004)		(158,004)
Stock-based compensation	32,417	$ 32,417
Vesting of stock-based compensation awards (in shares)		14
Stock options exercised (in shares)		519			(122)
Stock options exercised	344	$ 26,173			$ (25,829)
Repurchase of common stock (in shares)					(174)
Repurchase of common stock	$ (36,716)				$ (36,716)
Ending balance (in shares) at Nov. 30, 2024	775,764	775,764
Ending balance at Nov. 30, 2024	$ 4,293,106	$ 2,474,313	$ 11,202,524	$ 68,525	$ (9,452,256)
Ending balance (in shares) at Nov. 30, 2024	(372,268)				(372,268)