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Other Income/(Expense), Net (Schedule of Other Income/(Expense), Net) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Aug. 31, 2021 | Aug. 31, 2020
Other Income/(Expense), Net [Abstract] |  |
Interest income on corporate investments | $ 0.2 | $ 0.6
Interest expense | (9.2) | (9.0)
Other | 10.0 | 0.5
Other income/(expense), net | $ 1.0 | $ (7.9)

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