Balance Sheet Accounts - Estimated Fair Value and Principal Amount of Outstanding Debt (Detail) (USD $) In Millions, unless otherwise specified	Feb. 28, 2014	Nov. 30, 2013
Debt Instrument [Line Items]
Fair Value	$ 938.1	$ 938.6
Principal Amount	694.1	699.2
Term Loan [Member]
Debt Instrument [Line Items]
Fair Value	44.4	45.0
Principal Amount	44.4	45.0
7.125% Second-Priority Senior Secured Notes [Member]
Debt Instrument [Line Items]
Fair Value	500.5	494.5
Principal Amount	460.0	460.0
4.0625% Debentures [Member]
Debt Instrument [Line Items]
Fair Value	392.2	398.1
Principal Amount	188.7	193.2
Other Debt [Member]
Debt Instrument [Line Items]
Fair Value	1.0	1.0
Principal Amount	$ 1.0	$ 1.0