Taxes (Details) - Schedule of provision for income taxes (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2012
Federal
Current	$ 6.5	$ 4.5	$ 49.1
Deferred	(8.2)	2.4	(8.2)
Federal Income Tax Expense (Benefit), Continuing Operations	(1.7)	6.9	40.9
State and local
Current	6.8	0.5	12.0
Deferred	(2.6)	2.2	(0.7)
State and Local Income Tax Expense (Benefit), Continuing Operations	4.2	2.7	11.3
International
Current	5.8	7.8	12.8
Deferred	(2.2)	0.2	(3.4)
Foreign Income Tax Expense (Benefit), Continuing Operations	3.6	8.0	9.4
Total
Current	19.1	12.8	73.9
Deferred	(13.0)	4.8	(12.3)
Total provision for income taxes (in Dollars)	$ 6.1	$ 17.6	$ 61.6