Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock and Paid-In Capital	Retained Earnings	Other Accumulated Comprehensive (Loss) Income	Treasury Stock
Beginning balance (in shares) at May. 31, 2020		186,793,000
Beginning balance at May. 31, 2020	$ 3,235,202	$ 1,274,210	$ 7,296,509	$ (153,380)	$ (5,182,137)
Beginning balance (in shares) at May. 31, 2020					(83,378,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,110,968		1,110,968
Comprehensive loss, net of tax	184,268			184,268
Dividends	(530,462)		(530,462)
Stock-based compensation	112,035	$ 112,035
Vesting of stock-based compensation awards (in shares)		610,000
Stock options exercised (in shares)		1,668,000
Stock options exercised	129,957	$ 129,957
Repurchase of common stock (in shares)					(1,632,000)
Repurchase of common stock	(554,121)				$ (554,121)
Ending balance (in shares) at May. 31, 2021		189,071,000
Ending balance at May. 31, 2021	3,687,847	$ 1,516,202	7,877,015	30,888	$ (5,736,258)
Ending balance (in shares) at May. 31, 2021					(85,010,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,235,757		1,235,757
Comprehensive loss, net of tax	77,029			77,029
Dividends	(393,609)		(393,609)
Stock-based compensation	109,308	$ 109,308
Vesting of stock-based compensation awards (in shares)		528,000
Stock options exercised (in shares)		1,239,000			(71,000)
Stock options exercised	117,737	$ 146,407			$ (28,670)
Repurchase of common stock (in shares)					(4,046,000)
Repurchase of common stock	$ (1,525,873)				$ (1,525,873)
Ending balance (in shares) at May. 31, 2022	190,837,921	190,838,000
Ending balance at May. 31, 2022	$ 3,308,196	$ 1,771,917	8,719,163	107,917	$ (7,290,801)
Ending balance (in shares) at May. 31, 2022	(89,126,706)				(89,127,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 1,348,010		1,348,010
Comprehensive loss, net of tax	(30,139)			(30,139)
Dividends	(469,858)		(469,858)
Stock-based compensation	103,621	$ 103,621
Vesting of stock-based compensation awards (in shares)		287,000
Stock options exercised (in shares)		1,074,000			(360,000)
Stock options exercised	3,021	$ 156,004			$ (152,983)
Repurchase of common stock (in shares)					(980,000)
Repurchase of common stock	$ (398,865)				$ (398,865)
Ending balance (in shares) at May. 31, 2023	192,198,938	192,199,000
Ending balance at May. 31, 2023	$ 3,863,986	$ 2,031,542	$ 9,597,315	$ 77,778	$ (7,842,649)
Ending balance (in shares) at May. 31, 2023	(90,466,790)				(90,467,000)