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Other Income, Net (Schedule of Other Income, Net) (Details) - USD ($) $ in Millions | 3 Months Ended
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Aug. 31, 2025 | Aug. 31, 2024
Other Income and Expenses [Abstract] |  |
Interest income on corporate investments | $ 18.7 | $ 19.9
Other | 5.1 | 0.1
Other income, net | $ 23.8 | $ 20.0

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