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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 30, 2024 | Nov. 30, 2023 | Nov. 30, 2024 | Nov. 30, 2023 | May 31, 2024
Income Taxes [Line Items] |  |  |  |  |
Effective income tax expense rate | 13.90% | 25.50% | 18.20% | 25.30% |
Corporate income tax rate | 21.00% | 21.00% | 21.00% | 21.00% |
Increase in deferred income tax assets | $ 43,900,000 |  |  |  |
Deferred tax assets adjusted net amount | 21,800,000 |  |  |  |
Deferred income tax liability | 0 |  | $ 0 |  | $ 4,100,000
Unremitted foreign earnings | 157,200,000 |  | 157,200,000 |  | $ 285,600,000
Provision for deferred income taxes | 0 |  | $ 0 |  |
Minimum tax rate on reported profits |  |  | 15.00% |  |
U.S. Foreign Tax Credits |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Deferred tax assets valuation allowance | $ 22,100,000 |  | $ 22,100,000 |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiary and other recognized entity not within country of domicile. Includes, but is not limited to, other basis differences. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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