TAXES (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2012	May 31, 2011	May 31, 2010	May 31, 2009
Deferred Tax Liabilities, Undistributed Foreign Earnings	$ 78.6
Deferred Tax Assets, Net	113.7	76.4
Deferred Tax Assets, Net of Valuation Allowance, Current	71.4	56.2
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	42.3	20.2
Deferred Tax Valuation Allowance Decreased	2.4
Deferred Tax Valuation Allowance Increased		0.8
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	125.0
Unrecognized Tax Benefits	38.7	30.8	30.6	33.6
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	7.1	5.9	5.7
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	18.1	19.2	19.5
Recognized Tax Expense	2.4	1.0	1.9
Unrecognized Tax Benefits, Period Increase (Decrease)	7.9	0.2
Sales and Excise Tax Payable	$ 19.7