Fair Value Disclosures - Summary of Amount by Which Contractual Principal Exceeds Fair Value for Loans and Other Receivables Measured at Fair Value under Fair Value Option (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	May 31, 2013 Successor [Member]	Nov. 30, 2012 Predecessor [Member]
Gain (Loss) on Investments [Line Items]
Aggregate fair value of loans	$ 0	$ 34.7