Consolidated Statements of Financial Condition (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013 Successor [Member]	Nov. 30, 2012 Predecessor [Member]	Aug. 31, 2013 Variable Interest Entity, Primary Beneficiary [Member] Successor [Member]	Nov. 30, 2012 Variable Interest Entity, Primary Beneficiary [Member] Predecessor [Member]
Assets
Cash and cash equivalents	$ 4,119,096	$ 2,692,595	$ 43,938	$ 388,279
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	3,457,926	4,082,595
Financial instruments owned, at fair value
Corporate equity securities	1,933,302	1,762,775		105,271
Corporate debt securities	2,354,748	3,038,146		394,043
Government, federal agency and other sovereign obligations	4,027,870	5,153,750
Mortgage- and asset-backed securities	4,126,691	5,468,284		15,589
Loans and other receivables	942,969	678,311	108,700	383,667
Derivatives	121,869	298,086
Investments, at fair value	79,917	127,023	462	5,836
Physical commodities	110,915	144,016
Total financial instruments owned, at fair value	13,698,281	16,670,391	109,162	904,406
Investments in managed funds	55,897	57,763
Loans to and investments in related parties	563,828	586,420
Securities borrowed	5,316,449	5,094,679
Securities purchased under agreements to resell	4,420,886	3,357,602
Securities received as collateral	45,133
Receivables:
Brokers, dealers and clearing organizations	2,738,047	1,424,027		236,594
Customers	1,095,422	916,284
Fees, interest and other	241,909	196,811		10,931
Premises and equipment	191,018	185,991
Goodwill	1,718,115	365,670
Other assets	1,168,206	662,713	22	348
Total assets	38,830,213	36,293,541	153,122	1,540,558
LIABILITIES AND EQUITY
Short-term borrowing	50,000	150,000
Financial instruments sold, not yet purchased, at fair value:
Corporate equity securities	1,739,491	1,539,332
Corporate debt securities	1,320,896	1,389,312		325,979
Government, federal agency and other sovereign obligations	2,987,515	3,666,112
Mortgage- and asset-backed securities	37,968	241,211
Loans	360,537	207,227		199,610
Derivatives	133,827	229,127		505
Physical commodities	44,796	183,142
Total financial instruments sold, not yet purchased, at fair value	6,625,030	7,455,463		526,094
Collateralized financings:
Securities loaned	2,578,401	1,934,355
Securities sold under agreements to repurchase	10,863,548	8,181,250
Other secured financings	228,025	62,300	228,025	62,300
Obligation to return securities received as collateral	45,133
Payables:
Brokers, dealers and clearing organizations	1,058,396	2,819,677		201,237
Customers	4,837,843	5,568,017
Accrued expenses and other liabilities	956,403	1,062,068	40,959	10,656
Long-term debt	6,346,439	4,804,607
Mandatorily redeemable convertible preferred stock		125,000
Mandatorily redeemable preferred interests of consolidated subsidiaries		348,051		348,051
Total liabilities	33,589,218	32,510,788	268,984	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	5,169,864	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	(5,917)	(38,009)
Additional minimum pension liability		(15,128)
Total accumulated other comprehensive loss	(5,917)	(53,137)
Total member's / common stockholders' equity	5,163,947	3,436,015
Noncontrolling interests	77,048	346,738
Total equity	5,240,995	3,782,753
Total liabilities and equity	$ 38,830,213	$ 36,293,541