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Restructuring - Summary of Charges Recorded in Connection with Restructuring by Reportable Segment (Parenthetical) (Details) - USD ($) $ in Thousands | 12 Months Ended
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May 31, 2025 | May 31, 2024 | May 31, 2023
Restructuring Cost and Reserve [Line Items] |  |  |  |
Current Year Charges |  | $ 24,979 | $ 30,008 | $ 15,465
MAP 2025 |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Current Year Charges |  | 24,979 | 30,008 | 11,660
MAP 2025 | Other Restructuring Costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Current Year Charges |  | 532 | 4,555 | 2,537
MAP 2025 | Performance Coatings Segment |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Current Year Charges |  | 3,137 | 7,438 | 3,685
MAP 2025 | Performance Coatings Segment | Other Restructuring Costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Current Year Charges | [1] | $ 0 | 4,555 | 2,537
MAP 2025 | Performance Coatings Segment | Other Restructuring Costs | Trade Name |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Impairment of indefinite-lived assets |  |  | $ 3,300 | $ 2,500
[1] | Of the $4.6 million of other restructuring costs incurred during the year ended May 31, 2024, $3.3 million is associated with the impairment of an indefinite-lived tradename. The $2.5 million of other restructuring costs incurred during the year ended May 31, 2023, is associated with the impairment of an indefinite-lived tradename. See Note C, "Goodwill and Other Intangible Assets," of the Consolidated Financial Statements below for further description.

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- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-3 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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