Other Accrued Expenses - Schedule of accrued expenses (Details) - USD ($) $ in Millions	Feb. 29, 2020	May 31, 2019	Feb. 28, 2019
Schedule of accrued expenses [Abstract]
Accrued payroll, payroll taxes and benefits	$ 39.6	$ 41.2	$ 45.2
Accrued bonus and commissions	18.2	13.7	13.0
Returns liability	40.6	34.5	97.3
Accrued other taxes	24.6	29.3	23.5
Accrued advertising and promotions	11.0	9.6	10.2
Other accrued expenses	36.9	36.5	47.0
Total accrued expenses	$ 170.9	$ 164.8	$ 236.2