Earnings (Loss) Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2020
Earnings Per Share [Abstract]
Net income (loss) attributable to Class A and Common Shares	$ 80.6	$ (11.0)	$ (43.8)
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share (in millions)	34.5	34.3	34.6
Dilutive effect of Class A Stock and Common Stock potentially issuable pursuant to stock-based compensation plans (in millions)*	1.1	0.0	0.0
Adjusted weighted average Shares of Class A Stock and Common Stock outstanding for diluted earnings (loss) per share (in millions)	35.6	34.3	34.6
Basic:
Basic earnings (loss) per share (in Dollars per share)	$ 2.33	$ (0.32)	$ (1.27)
Diluted:
Diluted earnings (loss) per share (in Dollars per share)	$ 2.27	$ (0.32)	$ (1.27)