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Income Before Income Taxes (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
May 31, 2026 | May 31, 2025 | May 31, 2024
Income Before Income Taxes [Line Items] |  |  |
Income Before Income Taxes | $ (9.0) | $ (1,133.1) | $ (14.3)
U.S. |  |  |
Income Before Income Taxes [Line Items] |  |  |
Income Before Income Taxes | (135.9) | (1,026.6) | (92.2)
Foreign |  |  |
Income Before Income Taxes [Line Items] |  |  |
Income Before Income Taxes | $ 126.9 | $ (106.5) | $ 77.9

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