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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, 2022 | May 31, 2021
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Domestic |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Net actuarial (loss) gain | $ (314) | $ (497)
Prior service credit | 121 | 281
Total recognized in accumulated other comprehensive income not affecting retained earnings | (193) | (216)
Non-U.S. Plans |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Net actuarial (loss) gain | 3,878 | (5,901)
Total recognized in accumulated other comprehensive income not affecting retained earnings | $ 3,878 | $ (5,901)

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