Loss Per Share of Common Stock - Reconciliation of Numerator and Denominator Used to Calculate Basic and Diluted Loss Per Share of Common Stock (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2014	May 31, 2013
Numerator:
Loss from continuing operations	$ (49.4)	$ (11.7)	$ (51.5)	$ (25.8)
Loss from discontinued operations, net of income taxes	(0.8)	(0.1)	(0.8)	0
Net loss	$ (50.2)	$ (11.8)	$ (52.3)	$ (25.8)
Denominator:
Basic and diluted weighted average shares	57.9	59.5	58.7	59.4
Basic and Diluted EPS:
Loss per share from continuing operations	$ (0.86)	$ (0.20)	$ (0.88)	$ (0.43)
Loss per share from discontinued operations, net of income taxes	$ (0.01)	$ 0.00	$ (0.01)	$ 0.00
Net loss per share	$ (0.87)	$ (0.20)	$ (0.89)	$ (0.43)