Other Accrued Expenses (Detail) - Schedule of accrued expenses (USD $) In Millions, unless otherwise specified	Nov. 30, 2012	May 31, 2012	Nov. 30, 2011
Accrued payroll, payroll taxes and benefits	$ 45.7	$ 48.1	$ 45.2
Accrued bonus and commissions	16.5	57.3	21.9
Accrued other taxes	36.6	42.8	24.0
Accrued advertising and promotions	41.1	36.1	35.5
Accrued income taxes	11.3	10.2	28.2
Accrued insurance	8.7	8.4	8.5
Other accrued expenses	35.3	30.6	41.8
Total accrued expenses	$ 195.2	$ 233.5	$ 205.1