Goodwill and Other Intangibles - Schedule of activity in goodwill (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Aug. 31, 2026 |
Aug. 31, 2025 |
May 31, 2026 |
May 31, 2025 |
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| Intangible Asset, Goodwill and Other [Abstract] | ||||
| Gross goodwill | $ 239.0 | $ 238.5 | ||
| Goodwill, Impaired, Accumulated Impairment Loss | (39.6) | $ (39.6) | ||
| Goodwill [Roll Forward] | ||||
| Beginning balance | $ 199.4 | $ 198.9 | 198.9 | |
| Foreign currency translation | (0.2) | 0.8 | 0.5 | |
| Ending balance | $ 199.2 | $ 199.7 | $ 199.4 | |
| X | ||||||||||
- Definition Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) asset representing future economic benefit from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Includes amount, before amortization expense and impairment loss, of goodwill for private company. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of accumulated impairment loss for asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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