Restructuring - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Aug. 31, 2023	Feb. 28, 2025	Feb. 29, 2024
MAP 2025
Restructuring Cost And Reserve [Line Items]
Total expected costs increased, amount		$ 3.1
MAP 2025 | Severance and benefit charges
Restructuring Cost And Reserve [Line Items]
Total expected costs increased, amount		0.4
MAP 2025 | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Total expected costs increased, amount		$ 2.7
MAP 2025 | Other Restructuring Costs | Performance Coatings Segment | Trade name
Restructuring Cost And Reserve [Line Items]
Impairment of indefinite-lived assets	$ 3.3		$ 3.3
USL Restructuring | Universal Sealants
Restructuring Cost And Reserve [Line Items]
Loss on sale of Bridgecare services division	$ 4.5