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Restructuring - Additional Information (Detail) - 2020 MAP to Growth - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2019 | Nov. 30, 2018 | Nov. 30, 2019 | Nov. 30, 2018 | May 31, 2019
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Restructuring plan, expected to be formulated |  |  | During the second quarter ended November 30, 2018 |  |
Increase in current total expected costs |  |  | $ 4,600,000 |  |
Restructuring plan, anticipated to be completed |  |  | by the end of calendar year 2020 |  |
Consumer Group ("Consumer") Segment | Cost of Sales |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Inventory-related charges | $ 6,300,000 | $ 1,000.0 | $ 7,200,000 | $ 1,300 |
Inventory-related charges, favorable adjustment |  |  |  |  | $ 200,000
Performance Coatings Group ("PCG") Segment | Cost of Sales |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Inventory-related charges | $ 1,000,000.0 | 2,300 | 3,100,000 | 6,600 |
Construction Products Group ("CPG") Segment | Cost of Sales |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Inventory-related charges |  | $ 300 | 300,000 | $ 500 |
Severance and Benefit Charges |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |
Increase in current total expected costs |  |  | $ 4,600,000 |  |

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