Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock and Paid-In Capital	Retained Earnings	Other Accumulated Comprehensive Income	Treasury Stock
Beginning balance (in shares) at May. 31, 2022		763,352,000
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					(356,507,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,348,010		1,348,010
Comprehensive income (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)		1,146,000
Stock options exercised (in shares)		4,298,000			(1,440,000)
Stock options exercised	3,021	$ 156,004			$ (152,983)
Repurchase of common stock (in shares)					(3,920,000)
Repurchase of common stock	(398,865)				$ (398,865)
Ending balance (in shares) at May. 31, 2023		768,796,000
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					(361,867,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,571,592		1,571,592
Comprehensive income (loss), net of tax	13,423			13,423
Dividends	(550,952)		(550,952)
Stock-based compensation	116,986	$ 116,986
Vesting of stock-based compensation awards (in shares)		648,000
Stock options exercised (in shares)		3,653,000			(1,133,000)
Stock options exercised	1,370	$ 156,773			$ (155,403)
Repurchase of common stock (in shares)					(5,089,000)
Repurchase of common stock	$ (700,033)				$ (700,033)
Ending balance (in shares) at May. 31, 2024	773,097,000	773,097,000
Ending balance at May. 31, 2024	$ 4,316,372	$ 2,305,301	10,617,955	91,201	$ (8,698,085)
Ending balance (in shares) at May. 31, 2024	(368,089,000)				(368,089,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 1,812,281		1,812,281
Comprehensive income (loss), net of tax	(6,812)			(6,812)
Dividends	(631,785)		(631,785)
Stock-based compensation	128,329	$ 128,329
Vesting of stock-based compensation awards (in shares)		840,000
Stock options exercised (in shares)		2,999,000			(808,000)
Stock options exercised	896	$ 159,849			$ (158,953)
Repurchase of common stock (in shares)					(5,091,000)
Repurchase of common stock	$ (934,800)				$ (934,800)
Ending balance (in shares) at May. 31, 2025	776,936,000	776,936,000
Ending balance at May. 31, 2025	$ 4,684,481	$ 2,593,479	$ 11,798,451	$ 84,389	$ (9,791,838)
Ending balance (in shares) at May. 31, 2025	(373,988,000)				(373,988,000)