Earnings per Share - Schedule of Computation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Basic Earnings per Share from Continuing Operations
Net income	$ 1,571,592	$ 1,348,010	$ 1,235,757
Less: net income allocated to participating securities	5,928	5,463	6,132
Net income available to common shareholders	$ 1,565,664	$ 1,342,547	$ 1,229,625
Basic weighted average common shares outstanding (in shares)	101,653	101,645	103,172
Basic earnings per share from continuing operations (in dollars per share)	$ 15.40	$ 13.21	$ 11.92
Diluted Earnings per Share from Continuing Operations
Net income	$ 1,571,592	$ 1,348,010	$ 1,235,757
Less: net income allocated to participating securities	5,928	5,463	6,132
Net income available to common shareholders	$ 1,565,664	$ 1,342,547	$ 1,229,625
Basic weighted average common shares outstanding (in shares)	101,653	101,645	103,172
Effect of dilutive securities - employee stock options (in shares)	1,714	1,732	2,351
Diluted weighted average common shares outstanding (in shares)	103,367	103,377	105,523
Diluted earnings per share from continuing operations (in dollars per share)	$ 15.15	$ 12.99	$ 11.65