Restructuring - Additional Information (Detail) - MAP to Growth - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Restructuring Cost And Reserve [Line Items]
Restructuring plan, expected to be formulated	During the quarter ended November 30, 2018
Increase in current total expected costs	$ 4.9
Consumer Segment | Cost of Sales
Restructuring Cost And Reserve [Line Items]
Inventory-related charges	0.3	$ 0.9
PCG Segment | Cost of Sales
Restructuring Cost And Reserve [Line Items]
Inventory-related charges		2.0
CPG Segment | Cost of Sales
Restructuring Cost And Reserve [Line Items]
Inventory-related charges		$ 0.3
Severance and Benefit Charges
Restructuring Cost And Reserve [Line Items]
Increase in current total expected costs	2.0
Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Increase in current total expected costs	2.4
Other Restructuring Costs
Restructuring Cost And Reserve [Line Items]
Increase in current total expected costs	$ 0.5