TAXES (Detail) - Schedule of earnings from continuing operations before income taxes (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2012	May 31, 2011	May 31, 2010
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 170.7	$ 84.4	$ 115.4
Domestic Tax Authority [Member]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	146.3	77.2	113.4
Foreign Tax Authority [Member]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 24.4	$ 7.2	$ 2.0