Taxes (Details) - Schedule of provision for income taxes - USD ($) $ in Millions	12 Months Ended
	May 31, 2018	May 31, 2017	May 31, 2016
Federal
Current	$ (3.6)	$ 8.3	$ (4.0)
Deferred	5.0	17.7	19.2
State and local
Current	0.7	1.8	4.1
Deferred	(3.5)	2.2	1.8
International
Current	4.9	5.4	4.1
Deferred	0.0	0.0	(0.5)
Total
Current	2.0	15.5	4.2
Deferred	1.5	19.9	20.5
Total provision for income taxes (in Dollars)	$ 3.5	$ 35.4	$ 24.7