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Restructuring - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Aug. 31, 2023 | Nov. 30, 2024 | Nov. 30, 2023
MAP 2025 |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Total expected costs decreased, amount |  | $ 0.9 |
MAP 2025 | Severance and benefit charges |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Total expected costs increased, amount |  | 0.7 |
MAP 2025 | Facility Closure and Other Related Costs |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Total expected costs decreased, amount |  | $ 1.6 |
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 |  |

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