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Restructuring - Additional Information (Detail) - MAP to Growth - USD ($) $ in Millions | 3 Months Ended
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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 |

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