Goodwill and Other Intangibles (Details) - Schedule of other intangible assets subject to amortization - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Other intangibles subject to amortization - beginning balance		$ 12.2	$ 10.1
Additions	$ 1.6	4.5
Other	0.0	0.6
Amortization expense	(3.2)	(2.8)	$ (2.1)
Foreign currency translation	(0.1)	(0.2)
Total other intangibles subject to amortization, net of accumulated amortization of $30.1 and $26.9, respectively	10.5	12.2
Accumulated amortization	30.1	26.9
Total other intangibles not subject to amortization	2.1	2.1
Total other intangibles	$ 12.6	$ 14.3