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Restructuring - Summary of Charges Recorded in Connection with Restructuring by Reportable Segment (Parenthetical) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 30, 2023 | Aug. 31, 2023 | Nov. 30, 2022 | Nov. 30, 2023 | Nov. 30, 2022
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Current Year Charges |  | $ 1,239,000 |  | $ 1,272,000 | $ 7,737,000 | $ 2,626,000
MAP 2025 |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Current Year Charges |  | 1,239,000 |  |  | 7,737,000 |
MAP 2025 | Other Restructuring Costs |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Current Year Charges |  | 0 |  |  | 4,555,000 |
MAP 2025 | Performance Coatings Segment |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Current Year Charges |  | 306,000 |  |  | 5,722,000 |
MAP 2025 | Performance Coatings Segment | Other Restructuring Costs |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Current Year Charges | [1] | 0 |  |  | 4,555,000 |
MAP 2025 | Performance Coatings Segment | Tradename | Other Restructuring Costs |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Impairment of indefinite-lived assets |  | $ 0 | $ 3,300,000 |  | $ 3,300,000 |
[1] | Of the $4.6 million of other restructuring costs incurred for the six-month period ending November 30, 2023, $3.3 million is associated with the impairment of an indefinite-lived tradename described above.

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