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Marketable Securities (Detail) - USD ($) $ in Thousands | May 31, 2022 | May 31, 2021
--- | --- | ---
Marketable Securities, Current | $ 336,578 | $ 305,485
Commercial Paper | Maturing in 0 - 90 days |  |
Marketable Securities, Current | 106,497 | 106,631
Commercial Paper | Maturing in 91 - 180 days |  |
Marketable Securities, Current | 61,373 | 78,727
Commercial Paper | Maturing in 181 days -1 year |  |
Marketable Securities, Current | 91,706 | 87,590
Commercial Paper | Maturing in 1 - 2 years |  |
Marketable Securities, Current | 77,002 | 26,752
Certificates of Deposit | Maturing in 0 - 90 days |  |
Marketable Securities, Current | 0 | 3,262
Certificates of Deposit | Maturing in 91 - 180 days |  |
Marketable Securities, Current | 0 | 1,260
Certificates of Deposit | Maturing in 181 days -1 year |  |
Marketable Securities, Current | 0 | $ 1,263
Certificates of Deposit | Maturing in 1 - 2 years |  |
Marketable Securities, Current | $ 0 |

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