- Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Aug. 31, 2018	Aug. 31, 2017
Earnings Per Share, Basic and Diluted [Abstract]
Net income (loss) attributable to Class A and Common Shares	$ (61.3)	$ (63.7)
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share (in millions)	35.0	35.2
Earnings (loss) per share of Class A Stock and Common Stock:
Basic (in Dollars per share)	$ (1.75)	$ (1.81)
Diluted (in Dollars per share)	$ (1.75)	$ (1.81)