Earnings (Loss) Per Share (Details) - Schedule of Earnings Per Share, Basic and Diluted - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
Earnings Per Share [Abstract]
Net income (loss) attributable to Class A and Common Shares	$ (43.8)	$ 15.5	$ (5.0)
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share (in millions)	34.6	35.2	35.0
Dilutive effect of Class A Stock and Common Stock potentially issuable pursuant to stock-based compensation plans (in millions)	0.0	0.6	0.0
Adjusted weighted average Shares of Class A Stock and Common Stock outstanding for diluted earnings (loss) per share (in millions)	34.6	35.8	35.0
Basic:
Basic earnings (loss) per share (in Dollars per share)	$ (1.27)	$ 0.44	$ (0.14)
Diluted:
Net income (loss) (in Dollars per share)	$ (1.27)	$ 0.43	$ (0.14)