Capital Stock and Stock-Based Awards - Schedule of restricted stock units under the management stock purchase plan (Details) - Management Stock Purchase Plan - $ / shares	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	15,149	37,865	33,761
Purchase price per unit (in dollars per share)	$ 27.86	$ 25.51	$ 24.67