Other Accrued Expenses - Schedule of accrued expenses (Details) - USD ($) $ in Millions	Aug. 31, 2019	May 31, 2019	Aug. 31, 2018
Schedule of accrued expenses [Abstract]
Accrued payroll, payroll taxes and benefits	$ 43.6	$ 41.2	$ 43.9
Accrued bonus and commissions	9.3	13.7	13.3
Returns liability	35.5	34.5	45.4
Accrued other taxes	19.4	29.3	21.3
Accrued advertising and promotions	10.2	9.6	9.7
Other accrued expenses	37.6	36.5	52.3
Total accrued expenses	$ 155.6	$ 164.8	$ 185.9