Employee Benefit Plans (Details) - Schedule of changes in fair value level 3 assets - USD ($) $ in Millions	12 Months Ended
	May 31, 2018	May 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 5.8	$ 5.5
Actual Return on Plan Assets:
Relating to assets still held at year-end	(0.3)	1.2
Relating to assets sold during the year	0.0	0.0
Purchases, sales and settlements, net	0.0	0.0
Transfers in and/or out of Level 3	0.0	(0.3)
Foreign currency translation	0.2	(0.6)
Ending Balance	$ 5.7	$ 5.8