Other Accrued Expenses - Schedule of accrued expenses (Details) - USD ($) $ in Millions	Nov. 30, 2020	May 31, 2020	Nov. 30, 2019
Schedule of accrued expenses [Abstract]
Accrued payroll, payroll taxes and benefits	$ 38.6	$ 38.8	$ 41.7
Accrued bonus and commissions	10.6	12.1	13.3
Returns liability	54.5	43.5	42.4
Accrued other taxes	24.5	22.9	30.2
Accrued advertising and promotions	12.7	9.9	12.3
Other accrued expenses	42.1	34.3	38.3
Total accrued expenses	$ 183.0	$ 161.5	$ 178.2