Employee Benefit Plans (Details) - Schedule of recognized in accumulated other comprehensive loss - USD ($) $ in Millions	May 31, 2020	May 31, 2019
Pension and postretirement adjustments:
Net actuarial gain (loss)	$ (8.3)	$ (12.5)
Amount recognized in Accumulated comprehensive income (loss) before tax	8.4	13.0
Other Postretirement Benefits [Member]
Pension and postretirement adjustments:
Net actuarial gain (loss)	1.3	0.5
Amount recognized in Accumulated comprehensive income (loss) before tax	(1.2)	(0.0)
U.K. [Member] | Pension Plans [Member]
Pension and postretirement adjustments:
Net actuarial gain (loss)	(9.6)	(13.0)
Amount recognized in Accumulated comprehensive income (loss) before tax	$ 9.6	$ 13.0