Earnings (Loss) Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021
Earnings Per Share, Basic and Diluted [Abstract]
Net income (loss) attributable to Class A and Common Shares	$ (15.3)	$ (13.9)	$ 28.6	$ (18.6)
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share	34.6	34.3	34.6	34.3
Weighted Average Number Diluted Shares Outstanding Adjustment	0.0	0.0	1.0	0.0
Weighted Average Number of Shares Outstanding, Diluted	34.6	34.3	35.6	34.3
Earnings (loss) per share of Class A Stock and Common Stock:
Basic (in Dollars per share)	$ (0.44)	$ (0.41)	$ 0.83	$ (0.54)
Diluted (in Dollars per share)	$ (0.44)	$ (0.41)	$ 0.80	$ (0.54)