Capital Stock and Stock-Based Awards - Schedule of employee stock purchase plan activity (Details) - Employee Stock - $ / shares	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued	79,458	80,897	59,322
Weighted average purchase price per share (in dollars per share)	$ 32.38	$ 29.07	$ 32.52