Common Stock and Stock-Based Compensation - Weighted Average Assumptions Used to Estimate Fair Values (Detail) - Stock options	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.90%	0.80%	0.90%
Expected volatility	27.10%	24.90%	27.30%
Weighted average expected life (in years)	5 years 9 months 18 days	5 years 9 months 18 days	6 years
Risk-free interest rate	3.30%	0.90%	0.40%