Other Accrued Expenses - Schedule of accrued expenses (Details) - USD ($) $ in Millions	Nov. 30, 2016	May 31, 2016	Nov. 30, 2015
Schedule of accrued expenses [Abstract]
Accrued payroll, payroll taxes and benefits	$ 49.3	$ 44.9	$ 39.5
Accrued bonus and commissions	19.3	28.2	16.8
Accrued other taxes	33.9	30.4	31.4
Accrued advertising and promotions	37.3	35.7	39.1
Accrued insurance	7.8	7.7	7.5
Other accrued expenses	30.7	29.0	28.6
Total accrued expenses	$ 178.3	$ 175.9	$ 162.9