Other Accrued Expenses (Detail) - Schedule of accrued expenses (USD $) In Millions, unless otherwise specified	Feb. 28, 2013	May 31, 2012	Feb. 29, 2012
Accrued payroll, payroll taxes and benefits	$ 46.3	$ 48.1	$ 46.1
Accrued bonus and commissions	16.5	57.3	37.7
Accrued other taxes	26.0	42.8	39.1
Accrued advertising and promotions	39.0	36.1	38.1
Accrued income taxes	6.0	10.2	6.4
Accrued insurance	8.8	8.4	8.5
Other accrued expenses	32.8	30.6	33.2
Total accrued expenses	$ 175.4	$ 233.5	$ 209.1