Annual report pursuant to Section 13 and 15(d)

Other Expense, Net (Schedule of Other Expense, Net) (Details)

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Other Expense, Net (Schedule of Other Expense, Net) (Details) - USD ($)
$ in Millions
12 Months Ended
May 31, 2021
May 31, 2020
May 31, 2019
Other Expense, Net [Abstract]      
Interest income on corporate investments $ 2.3 $ 12.3 $ 13.3
Interest expense (35.8) (38.8) (17.6)
Other 7.0 3.1 1.0
Other expense, net $ (26.5) $ (23.4) $ (3.3)