Restructuring - Additional Information (Detail) - USD ($)	3 Months Ended
	Aug. 31, 2023	Aug. 31, 2022
MAP to Growth
Restructuring Cost And Reserve [Line Items]
Restructuring costs	$ 0	$ 1,400,000
Restructuring, Incurred Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Restructuring Expense	Restructuring Expense
MAP 2025
Restructuring Cost And Reserve [Line Items]
Total expected costs increased, amount	$ 12,100,000
MAP 2025 | Severance and benefit charges
Restructuring Cost And Reserve [Line Items]
Total expected costs increased, amount	7,400,000
MAP 2025 | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Total expected costs increased, amount	100,000
MAP 2025 | Other Restructuring Costs
Restructuring Cost And Reserve [Line Items]
Total expected costs increased, amount	4,600,000
MAP 2025 | Other Restructuring Costs | Performance Coatings Segment | Tradename
Restructuring Cost And Reserve [Line Items]
Impairment of indefinite-lived assets	3,300,000
USL Restructuring | Universal Sealants
Restructuring Cost And Reserve [Line Items]
Loss on sale of Bridgecare services division	$ 4,500,000