Taxes (Details) - Schedule of provision for income taxes - USD ($) $ in Millions	12 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2015
Federal
Current	$ 8.3	$ (4.0)	$ 3.3
Deferred	17.7	19.2	5.3
Federal Income Tax Expense (Benefit), Continuing Operations	26.0	15.2	8.6
State and local
Current	1.8	4.1	1.2
Deferred	2.2	1.8	0.9
State and Local Income Tax Expense (Benefit), Continuing Operations	4.0	5.9	2.1
International
Current	5.4	4.1	4.7
Deferred	0.0	(0.5)	(1.0)
Foreign Income Tax Expense (Benefit), Continuing Operations	5.4	3.6	3.7
Total
Current	15.5	4.2	9.2
Deferred	19.9	20.5	5.2
Total provision for income taxes (in Dollars)	$ 35.4	$ 24.7	$ 14.4