Restructuring - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2024	Aug. 31, 2023
MAP 2025
Restructuring Cost And Reserve [Line Items]
Total expected costs decreased, amount	$ 10.9
MAP 2025 | Severance and benefit charges
Restructuring Cost And Reserve [Line Items]
Total expected costs increased, amount	2.1
MAP 2025 | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Total expected costs decreased, amount	$ 13.0
MAP 2025 | Other Restructuring Costs | Performance Coatings Segment | Trade name
Restructuring Cost And Reserve [Line Items]
Impairment of indefinite-lived assets		$ 3.3
USL Restructuring | Universal Sealants
Restructuring Cost And Reserve [Line Items]
Loss on sale of Bridgecare services division		$ 4.5