Fair Value Disclosures - Summary of Valuation Bases (Pricing Information) for Financial Instruments (Detail)	Aug. 31, 2013 Successor [Member]	Nov. 30, 2012 Predecessor [Member]	Aug. 31, 2013 Exchange closing prices [Member] Successor [Member]	Nov. 30, 2012 Exchange closing prices [Member] Predecessor [Member]	Aug. 31, 2013 Recently observed transaction prices [Member] Successor [Member]	Nov. 30, 2012 Recently observed transaction prices [Member] Predecessor [Member]	Aug. 31, 2013 External pricing services [Member] Successor [Member]	Nov. 30, 2012 External pricing services [Member] Predecessor [Member]	Aug. 31, 2013 Broker quotes [Member] Successor [Member]	Nov. 30, 2012 Broker quotes [Member] Predecessor [Member]	Aug. 31, 2013 Valuation techniques [Member] Successor [Member]	Nov. 30, 2012 Valuation techniques [Member] Predecessor [Member]
Financial Instruments Owned And Sold Not Yet Purchased Measured Using Different Valuation Basis [Line Items]
Financial Instruments Owned	100.00%	100.00%	13.00%	11.00%	7.00%	5.00%	56.00%	70.00%	3.00%	1.00%	21.00%	13.00%
Financial Instruments Sold, Not Yet Purchased	100.00%	100.00%	26.00%	19.00%	4.00%	6.00%	65.00%	71.00%	3.00%	0.00%	2.00%	4.00%