Earnings per Share - Schedule of Computation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	May 31, 2025	May 31, 2024	May 31, 2023
Basic Earnings per Share
Net income	$ 1,812,281	$ 1,571,592	$ 1,348,010
Less: net income allocated to participating securities	6,351	5,928	5,463
Net income available to common shareholders	$ 1,805,930	$ 1,565,664	$ 1,342,547
Basic weighted average common shares outstanding (in shares)	403,530	406,612	406,580
Basic earnings per share (in dollars per share)	$ 4.48	$ 3.85	$ 3.30
Diluted Earnings per Share
Net income	$ 1,812,281	$ 1,571,592	$ 1,348,010
Less: net income allocated to participating securities	6,351	5,928	5,463
Net income available to common shareholders	$ 1,805,930	$ 1,565,664	$ 1,342,547
Basic weighted average common shares outstanding (in shares)	403,530	406,612	406,580
Effect of dilutive securities - employee stock options (in shares)	6,756	6,856	6,928
Diluted weighted average common shares outstanding (in shares)	410,286	413,468	413,508
Diluted earnings per share (in dollars per share)	$ 4.40	$ 3.79	$ 3.25