Loss Per Share of Common Stock - Schedule of Potentially Dilutive Securities Excluded from Computation (Detail) In Millions, unless otherwise specified	3 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive securities	23.2	24.1
Convertible Subordinated Debentures, Bearing Interest at 4.0625% Maturing in December 2034 [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive securities	21.3	22.2
Employee Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive securities	0.6	0.7
Unvested Restricted Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive securities	1.3	1.2