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

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details