Employee Benefit Plans (Details) - Schedule of change in fair value of plan assets - Pension Plans [Member] - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 31, 2019
Change in plan assets:
Fair value of plan assets at beginning of year	$ 31.8
Fair value of plan assets at end of year	36.6	$ 31.8
U.K. [Member]
Change in plan assets:
Fair value of plan assets at beginning of year	31.8	30.8
Actual return on plan assets	6.0	2.8
Employer contributions	1.1	1.0
Benefits paid, including expenses	(1.4)	(1.2)
Foreign currency translation	(0.9)	(1.6)
Fair value of plan assets at end of year	$ 36.6	$ 31.8