Other Accrued Expenses - Schedule of accrued expenses (Details) - USD ($) $ in Millions	Nov. 30, 2019	May 31, 2019	Nov. 30, 2018
Schedule of accrued expenses [Abstract]
Accrued payroll, payroll taxes and benefits	$ 41.7	$ 41.2	$ 42.3
Accrued bonus and commissions	13.3	13.7	16.8
Returns liability	42.4	34.5	78.7
Accrued other taxes	30.2	29.3	31.3
Accrued advertising and promotions	12.3	9.6	9.2
Other accrued expenses	38.3	36.5	49.5
Total accrued expenses	$ 178.2	$ 164.8	$ 227.8