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, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
Earnings Per Share, Basic and Diluted [Abstract]
Net income (loss) attributable to Class A and Common Shares	$ (19.2)	$ (15.3)	$ 10.6	$ 28.6
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share	33.7	34.6	34.2	34.6
Weighted Average Number Diluted Shares Outstanding Adjustment	0.0	0.0	0.9	1.0
Weighted Average Number of Shares Outstanding, Diluted	33.7	34.6	35.1	35.6
Earnings (loss) per share of Class A Stock and Common Stock:
Basic (in Dollars per share)	$ (0.57)	$ (0.44)	$ 0.31	$ 0.83
Diluted (in Dollars per share)	$ (0.57)	$ (0.44)	$ 0.30	$ 0.80
Antidilutive shares excluded from calculation of earnings per share	0.7	0.8	0.6	1.8