Other Accrued Expenses (Details) - Schedule of accrued expenses (USD $) In Millions, unless otherwise specified	Feb. 28, 2015	May 31, 2014	Feb. 28, 2014
Schedule of accrued expenses [Abstract]
Accrued payroll, payroll taxes and benefits	$ 41.0	$ 41.7	$ 38.1
Accrued bonus and commissions	20.0	36.9	26.5
Accrued other taxes	24.1	27.5	24.1
Accrued advertising and promotions	35.3	35.6	37.8
Accrued income taxes	5.5	4.7	3.4
Accrued insurance	8.1	8.3	8.2
Other accrued expenses	27.2	30.0	29.4
Total accrued expenses	$ 161.2	$ 184.7	$ 167.5