Earnings Per Share - Schedule of Computation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Feb. 28, 2025	Nov. 30, 2024	Aug. 31, 2024	Feb. 29, 2024	Nov. 30, 2023	Aug. 31, 2023	Feb. 28, 2025	Feb. 29, 2024
Basic earnings per share:
Net income	$ 463,497	$ 448,495	$ 452,033	$ 397,579	$ 374,613	$ 385,085	$ 1,364,025	$ 1,157,277
Less: net income allocated to participating securities	1,629			1,543			4,791	4,486
Net income available to common shareholders	$ 461,868			$ 396,036			$ 1,359,234	$ 1,152,791
Basic weighted average common shares outstanding (in shares)	403,769			405,910			403,568	406,723
Basic earnings per share (in dollars per share)	$ 1.14			$ 0.98			$ 3.37	$ 2.83
Diluted earnings per share:
Net income	$ 463,497	$ 448,495	$ 452,033	$ 397,579	$ 374,613	$ 385,085	$ 1,364,025	$ 1,157,277
Less: net income allocated to participating securities	1,629			1,543			4,791	4,486
Net income available to common shareholders	$ 461,868			$ 396,036			$ 1,359,234	$ 1,152,791
Basic weighted average common shares outstanding (in shares)	403,769			405,910			403,568	406,723
Effect of dilutive securities - employee stock options (in shares)	6,538			6,836			6,924	6,666
Diluted weighted average common shares outstanding (in shares)	410,307			412,746			410,492	413,389
Diluted earnings per share (in dollars per share)	$ 1.13			$ 0.96			$ 3.31	$ 2.79