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Activity that Occurred for Level Three Assets (Detail) - Significant Unobservable Inputs (Level 3) - Pension Benefits - USD ($) $ in Thousands | 12 Months Ended
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May 31, 2023 | May 31, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |
Balance at Beginning of Period |  | $ 23,179 | $ 28,398
Actual Return on Plan Assets For Assets Still Held at Reporting Date |  | (2,399) | (1,009)
Settlements | [1] | (1,362) | (4,210)
Balance at End of Period |  | $ 19,418 | $ 23,179
[1] | Includes the impact of exchange rate changes during the year.

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