Derivative Financial Instruments and Hedging Activities - Schedule of Gain (Loss) Recognized in Earnings for Economic (Non-Designated) Derivative Financial Instruments (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
May 31, 2026 |
May 31, 2025 |
May 31, 2024 |
|
| Derivative [Line Items] | |||
| Gain (Loss) Recognized in Earnings | $ 9.1 | $ 0.7 | $ (0.4) |
| Commodity Contracts | Cost of Sales | |||
| Derivative [Line Items] | |||
| Gain (Loss) Recognized in Earnings | 11.4 | (3.3) | (0.4) |
| Foreign Currency Exchange Contracts | Miscellaneous Income, Net | |||
| Derivative [Line Items] | |||
| Gain (Loss) Recognized in Earnings | $ (2.3) | $ 4.0 | $ 0.0 |