Quarterly report pursuant to Section 13 or 15(d)

Other (Expense)/Income, Net (Schedule of Interest (Expense)/Income, Net) (Details)

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Other (Expense)/Income, Net (Schedule of Interest (Expense)/Income, Net) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Nov. 30, 2019
Nov. 30, 2018
Nov. 30, 2019
Nov. 30, 2018
Other (Expense)/Income, Net [Abstract]        
Interest income on corporate funds $ 3.3 $ 2.8 $ 7.8 $ 6.0
Interest expense (10.1) (0.8) (20.4) (1.7)
Other 2.1 0.1 3.1 0.1
Other (expense)/income, net $ (4.7) $ 2.1 $ (9.5) $ 4.4