Other Accrued Expenses (Details) - Schedule of accrued expenses - USD ($) $ in Millions	Aug. 31, 2015	May. 31, 2015	Aug. 31, 2014
Schedule of accrued expenses [Abstract]
Accrued payroll, payroll taxes and benefits	$ 41.2	$ 44.3	$ 40.4
Accrued bonus and commissions	10.9	32.6	12.4
Accrued other taxes	21.6	26.7	23.1
Accrued advertising and promotions	29.8	33.4	29.8
Accrued insurance	7.8	7.8	8.6
Other accrued expenses	28.8	28.8	28.6
Total accrued expenses	$ 140.1	$ 173.6	$ 142.9