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Pretax Net Actuarial (Loss) Gain, Prior Service (Cost) and Transition Assets/(Obligation) Recognized in Accumulated Other Comprehensive Income (Loss) not Affecting Retained Earnings, Postretirement (Detail) - Postretirement Benefits - USD ($) $ in Thousands | May 31, 2023 | May 31, 2022
--- | --- | ---
Domestic |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Net actuarial gain (loss) | $ (99) | $ (314)
Prior service credit |  | 121
Total recognized in accumulated other comprehensive income not affecting retained earnings | (99) | (193)
Non-U.S. Plans |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Net actuarial gain (loss) | 3,838 | 3,878
Total recognized in accumulated other comprehensive income not affecting retained earnings | $ 3,838 | $ 3,878

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