Employee Benefit Plans (Details) - Schedule of accumulated benefit obligation in excess of plan assets - Pension Plans [Member] - USD ($) $ in Millions	May 31, 2018	May 31, 2017	May 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 32.4	$ 161.7
U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligations	0.0	127.8	$ 125.0
Accumulated benefit obligations	0.0	127.8
Fair value of plan assets	1.6	132.5	135.1
U.K. [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligations	40.0	41.7	39.8
Projected benefit obligations	40.0	41.7
Accumulated benefit obligations	39.4	40.9
Fair value of plan assets	30.8	29.2	$ 29.1
Fair value of plan assets	$ 30.8	$ 29.2