Earnings (Loss) Per Share (Details) - Schedule of Earnings Per Share, Basic and Diluted (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Schedule of Earnings Per Share, Basic and Diluted [Abstract]
Earnings (loss) from continuing operations attributable to Class A and Common Shares (in Dollars)	$ (34.0)	$ (30.1)
Earnings (loss) from discontinued operations attributable to Class A and Common Shares, net of tax (in Dollars)	(0.1)	0.2
Net income (loss) attributable to Class A and Common Shares (in Dollars)	$ (34.1)	$ (29.9)
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share (in millions) (in Shares)	32.4	31.8
Dilutive effect of Class A Stock and Common Stock potentially issuable pursuant to stock-based compensation plans (in millions) (in Shares)
Adjusted weighted average Shares of Class A Stock and Common Stock outstanding for diluted earnings (loss) per share (in millions) (in Shares)
Basic earnings (loss) per share:
Earnings (loss) from continuing operations	$ (1.05)	$ (0.94)
Earnings (loss) from discontinued operations, net of tax	$ 0.00	$ 0.00
Net income (loss) (in Dollars per share)	$ (1.05)	$ (0.94)
Diluted earnings (loss) per share:
Earnings (loss) from continuing operations	$ (1.05)	$ (0.94)
Earnings (loss) from discontinued operations, net of tax	$ 0.00	$ 0.00
Net income (loss) (in Dollars per share)	$ (1.05)	$ (0.94)