Consolidated Statements of Financial Condition (USD $) In Thousands, unless otherwise specified	Nov. 30, 2013 Successor [Member]	Nov. 30, 2013 Successor [Member] Variable Interest Entity, Primary Beneficiary [Member]	Nov. 30, 2012 Predecessor [Member]	Nov. 30, 2012 Predecessor [Member] Variable Interest Entity, Primary Beneficiary [Member]
Assets
Cash and cash equivalents	$ 3,561,119	$ 176	$ 2,692,595	$ 388,279
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	3,616,602		4,082,595
Financial instruments owned, at fair value
Corporate equity securities	2,098,597		1,762,775	105,271
Corporate debt securities	2,982,768		3,038,146	394,043
Government, federal agency and other sovereign obligations	5,346,152		5,153,750
Mortgage- and asset-backed securities	4,473,135		5,398,078	15,589
Loans and other receivables	1,349,128	97,500	678,311	383,667
Derivatives	261,093		368,292
Investments, at fair value	101,282	412	127,023	5,836
Physical commodities	37,888		144,016
Total financial instruments owned, at fair value	16,650,043	97,912	16,670,391	904,406
Investments in managed funds	57,285		57,763
Loans to and investments in related parties	701,873		586,420
Securities borrowed	5,359,846		5,094,679
Securities purchased under agreements to resell	3,746,920		3,357,602
Securities received as collateral	11,063
Receivables:
Brokers, dealers and clearing organizations	2,119,279		1,424,027	236,594
Customers	1,046,945		916,284
Fees, interest and other	251,072		196,811	10,931
Premises and equipment	202,467		185,991
Goodwill	1,722,346		365,670
Other assets	1,130,136	2,275	662,713	348
Total assets	40,176,996	100,363	36,293,541	1,540,558
Liabilities
Short-term borrowing	12,000		150,000
Financial instruments sold, not yet purchased, at fair value:
Corporate equity securities	1,823,299		1,539,332
Corporate debt securities	1,346,078		1,389,312	325,979
Government, federal agency and other sovereign obligations	3,155,683		3,666,112
Mortgage- and asset-backed securities	34,691		228,251
Loans	695,300		207,227	199,610
Derivatives	180,079		242,087	505
Physical commodities	36,483		183,142
Total financial instruments sold, not yet purchased, at fair value	7,271,613		7,455,463	526,094
Collateralized financings:
Securities loaned	2,506,122		1,934,355
Securities sold under agreements to repurchase	10,779,845		8,181,250
Other secured financings	234,711	226,000	62,300	62,300
Obligation to return securities received as collateral	11,063
Payables:
Brokers, dealers and clearing organizations	1,281,253		2,819,677	201,237
Customers	5,208,768		5,568,017
Accrued expenses and other liabilities	1,217,141	706	1,062,068	10,656
Long-term debt	6,232,806		4,804,607
Mandatorily redeemable convertible preferred stock			125,000
Mandatorily redeemable preferred interests of consolidated subsidiaries			348,051	348,051
Total liabilities	34,755,322	226,706	32,510,788	1,148,338
EQUITY
Common stock, $0.0001 par value. Authorized 500,000,000 shares; issued 204,147,007 shares at November 30, 2012			20
Member's paid-in capital/ Additional paid-in capital	5,280,420		2,219,959
Retained earnings			1,281,855
Treasury stock, at cost, 835,033 shares at November 30, 2012			(12,682)
Accumulated other comprehensive loss:
Currency translation adjustments	21,341		(38,009)
Additional minimum pension liability	2,759		(15,128)
Total accumulated other comprehensive loss	24,100		(53,137)
Total member's / common stockholders' equity	5,304,520		3,436,015
Noncontrolling interests	117,154		346,738
Total equity	5,421,674		3,782,753
Total liabilities and equity	$ 40,176,996		$ 36,293,541