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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, 2021
May 31, 2020
May 31, 2019
Earnings Per Share [Abstract]      
Net income (loss) attributable to Class A and Common Shares $ (11.0) $ (43.8) $ 15.6
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share (in millions) 34.3 34.6 35.2
Dilutive effect of Class A Stock and Common Stock potentially issuable pursuant to stock-based compensation plans (in millions)* 0.0 0.0 0.6
Adjusted weighted average Shares of Class A Stock and Common Stock outstanding for diluted earnings (loss) per share (in millions) 34.3 34.6 35.8
Basic:      
Basic earnings (loss) per share (in Dollars per share) $ (0.32) $ (1.27) $ 0.44
Diluted:      
Net income (loss) (in Dollars per share) $ (0.32) $ (1.27) $ 0.43