Jefferies 10-Q 8 Oct 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Aug. 31, 2014
Document And Entity Information [Abstract]	'
Document Type	'10-Q
Amendment Flag	'false
Document Period End Date	31-Aug-14
Document Fiscal Year Focus	'2014
Document Fiscal Period Focus	'Q3
Entity Registrant Name	'JEFFERIES GROUP LLC
Entity Central Index Key	'0001084580
Current Fiscal Year End Date	'--11-30
Entity Filer Category	'Non-accelerated Filer
Entity Common Stock, Shares Outstanding	0

Consolidated_Statements_of_Fin

Consolidated Statements of Financial Condition (Unaudited) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and cash equivalents	$4,035,239	$3,561,119
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	3,301,185	3,616,602
Financial instruments owned, at fair value	18,420,173	16,650,043
Investments in managed funds	77,881	57,285
Loans to and investments in related parties	631,568	701,873
Securities borrowed	6,270,452	5,359,846
Securities purchased under agreements to resell	4,570,533	3,746,920
Securities received as collateral	8,326	11,063
Receivables:	'	'
Brokers, dealers and clearing organizations	2,412,829	2,207,978
Customers	1,660,122	958,246
Fees, interest and other	258,122	251,072
Premises and equipment	242,009	202,467
Goodwill	1,723,619	1,722,346
Other assets	1,152,022	1,130,136
Total assets	44,764,080	40,176,996
LIABILITIES AND EQUITY	'	'
Short-term borrowings	92,000	12,000
Financial instruments sold, not yet purchased, at fair value	9,723,247	7,271,613
Collateralized financings:	'	'
Securities loaned	2,468,513	2,506,122
Securities sold under agreements to repurchase	10,532,059	10,779,845
Other secured financings	616,666	234,711
Obligation to return securities received as collateral	8,326	11,063
Payables:	'	'
Brokers, dealers and clearing organizations	1,919,230	1,320,700
Customers	5,943,491	5,169,321
Accrued expenses and other liabilities	1,232,156	1,217,141
Long-term debt	6,625,978	6,232,806
Total liabilities	39,161,666	34,755,322
EQUITY	'	'
Member's paid-in capital	5,539,206	5,280,420
Accumulated other comprehensive income:	'	'
Currency translation adjustments	29,240	21,341
Additional minimum pension liability	2,759	2,759
Total accumulated other comprehensive income	31,999	24,100
Total member's equity	5,571,205	5,304,520
Noncontrolling interests	31,209	117,154
Total equity	5,602,414	5,421,674
Total liabilities and equity	$44,764,080	$40,176,996

Consolidated_Statements_of_Fin1

Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Thousands, unless otherwise specified
Cash and cash equivalents	$4,035,239	$3,561,119
Securities pledged to creditors	14,263,610	13,253,537
Financial instruments owned, at fair value	18,420,173	16,650,043
Fees, interest and other	258,122	251,072
Other assets	1,152,022	1,130,136
Other secured financings	616,666	234,711
Accrued expenses and other liabilities	1,232,156	1,217,141
Variable Interest Entities [Member]	'	'
Cash and cash equivalents	178	176
Financial instruments owned, at fair value	57,517	97,912
Fees, interest and other	1,036	0
Other assets	0	2,275
Other secured financings	603,948	226,000
Accrued expenses and other liabilities	$0	$706

Consolidated_Statements_of_Ear

Consolidated Statements of Earnings (Unaudited) (USD $)	3 Months Ended		6 Months Ended	9 Months Ended	3 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2013	Aug. 31, 2014	Feb. 28, 2013
	Successor [Member]	Successor [Member]	Successor [Member]	Successor [Member]	Predecessor [Member]
Revenues:	'	'	'	'	'
Commissions	$159,085,000	$153,402,000	$316,161,000	$488,526,000	$146,240,000
Principal transactions	144,354,000	-24,910,000	109,661,000	566,133,000	300,278,000
Investment banking	467,793,000	309,339,000	586,473,000	1,213,262,000	288,278,000
Asset management fees and investment income from managed funds	8,463,000	13,549,000	24,076,000	15,319,000	10,883,000
Interest	249,251,000	230,672,000	489,337,000	782,059,000	249,277,000
Other	26,489,000	28,630,000	54,875,000	57,962,000	27,004,000
Total revenues	1,055,435,000	710,682,000	1,580,583,000	3,123,261,000	1,021,960,000
Interest expense	212,126,000	178,987,000	390,450,000	657,932,000	203,416,000
Net revenues	843,309,000	531,695,000	1,190,133,000	2,465,329,000	818,544,000
Interest on mandatorily redeemable preferred interests of consolidated subsidiaries	'	'	3,368,000	'	10,961,000
Net revenues, less interest on mandatorily redeemable preferred interests of consolidated subsidiaries	'	'	1,186,765,000	2,465,329,000	807,583,000
Non-interest expenses:	'	'	'	'	'
Compensation and benefits	477,268,000	293,771,000	667,651,000	1,390,043,000	474,217,000
Non-compensation expenses:	'	'	'	'	'
Floor brokerage and clearing fees	55,967,000	49,166,000	98,068,000	159,500,000	46,155,000
Technology and communications	67,286,000	62,266,000	126,105,000	201,849,000	59,878,000
Occupancy and equipment rental	28,477,000	26,205,000	58,430,000	81,652,000	24,309,000
Business development	27,800,000	17,624,000	40,356,000	79,193,000	24,927,000
Professional services	31,231,000	25,269,000	54,788,000	81,395,000	24,135,000
Other	19,645,000	34,012,000	52,732,000	54,656,000	14,475,000
Total non-compensation expenses	230,406,000	214,542,000	430,479,000	658,245,000	193,879,000
Total non-interest expenses	707,674,000	508,313,000	1,098,130,000	2,048,288,000	668,096,000
Earnings before income taxes	135,635,000	23,382,000	88,635,000	417,041,000	139,487,000
Income tax expense	51,762,000	8,493,000	33,500,000	155,962,000	48,645,000
Net earnings	83,873,000	14,889,000	55,135,000	261,079,000	90,842,000
Net earnings attributable to noncontrolling interests	312,000	3,149,000	3,887,000	3,760,000	10,704,000
Net earnings attributable to Jefferies Group LLC/common stockholders	$83,561,000	$11,740,000	$51,248,000	$257,319,000	$80,138,000
Earnings per common share:	'	'	'	'	'
Basic	'	'	'	'	$0.35
Diluted	'	'	'	'	$0.35
Dividends declared per common share	'	'	'	'	$0.08
Weighted average common shares:	'	'	'	'	'
Basic	'	'	'	'	213,732
Diluted	'	'	'	'	217,844

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended						6 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2013		Aug. 31, 2014		Aug. 31, 2013		Aug. 31, 2013		Aug. 31, 2014
			Successor [Member]		Successor [Member]		Successor [Member]		Successor [Member]
Net earnings	$90,842		$83,873		$14,889		$55,135		$261,079
Other comprehensive (loss) income, net of tax:	'		'		'		'		'
Currency translation adjustments	-10,018		-8,744		5,549		-5,917		7,899
Total other comprehensive income (loss), net of tax	-10,018	[1]	-8,744	[1]	5,549	[1]	-5,917	[1]	7,899	[1]
Comprehensive income	80,824		75,129		20,438		49,218		268,978
Net earnings attributable to noncontrolling interests	10,704		312		3,149		3,887		3,760
Comprehensive income attributable to Jefferies Group LLC/ common stockholders	$70,120		$74,817		$17,289		$45,331		$265,218
[1]	None of the components of other comprehensive income (loss) are attributable to noncontrolling interests.

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Equity (Unaudited) (USD $)

Total

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

In Thousands

Members Paid In Capital [Member]

Accumulated other comprehensive income (loss) [Member]

Noncontrolling interests [Member]

Common stock, par value $0.0001 per share [Member]

Additional paid-in capital [Member]

Retained earnings [Member]

Accumulated other comprehensive income (loss) [Member]

Treasury stock, at cost [Member]

Noncontrolling interests [Member]

Balance at Nov. 30, 2012

'

'

'

'

'

'

'

'

'

'

'

$346,738

Balance at Nov. 30, 2012

'

'

'

'

'

'

20

2,219,959

1,281,855

-53,137

[1],[2]

-12,682

'

Benefit plan share activity

[3]

'

'

'

'

'

'

'

3,138

'

'

'

'

Currency adjustment

-10,018

'

'

'

'

'

'

'

'

-10,018

[1],[2]

'

'

Purchases

'

'

'

'

'

'

'

'

'

'

-166,541

'

Issued

'

'

'

'

'

'

1

'

'

'

'

'

Share-based expense, net of forfeitures and clawbacks

'

'

'

'

'

'

'

22,288

'

'

'

'

Net earnings to common shareholders

'

'

'

'

'

'

'

'

80,138

'

'

'

Returns / forfeitures

'

'

'

'

'

'

'

'

'

'

-1,922

'

Proceeds from exercise of stock options

'

'

'

'

'

'

'

57

'

'

'

'

Dividends

'

'

'

'

'

'

'

'

-17,217

'

'

'

Acquisitions and contingent consideration

'

'

'

'

'

'

'

2,535

'

'

'

'

Tax benefit for issuance of share-based awards

'

'

'

'

'

'

'

-17,965

'

'

'

'

Dividend equivalents on share-based plans

'

'

'

'

'

'

'

1,418

'

'

'

'

Total equity

'

'

'

'

'

3,688,107

'

'

'

'

'

'

Net earnings attributable to noncontrolling interests

-10,704

'

'

'

'

-10,704

'

'

'

'

'

10,704

Distributions

'

'

'

'

'

-1,262

'

'

'

'

'

-1,262

Balance at Feb. 28, 2013

'

'

'

'

356,180

'

'

'

'

'

'

356,180

Balance at Feb. 28, 2013

'

'

4,754,101

'

'

3,331,927

21

2,231,430

1,344,776

-63,155

[1],[2]

-181,145

'

Contributions

'

'

362,255

'

'

'

'

'

'

'

'

'

Currency adjustment

[1],[2]

'

'

'

21,341

'

'

'

'

'

'

'

'

Net earnings to common shareholders

'

'

161,191

'

'

'

'

'

'

'

'

'

Pension adjustment, net of tax

[1],[2]

'

'

'

2,759

'

'

'

'

'

'

'

'

Tax benefit for issuance of share-based awards

'

'

2,873

'

'

'

'

'

'

'

'

'

Total equity

'

5,421,674

'

'

'

'

'

'

'

'

'

'

Net earnings attributable to noncontrolling interests

'

'

'

'

8,418

'

'

'

'

'

'

'

Contributions

'

'

'

'

100,210

'

'

'

'

'

'

'

Distributions

'

'

'

'

-25

'

'

'

'

'

'

'

Redemptions

'

'

'

'

-347,629

'

'

'

'

'

'

'

Balance at Nov. 30, 2013

117,154

'

'

'

117,154

'

'

'

'

'

'

'

Balance at Nov. 30, 2013

'

5,304,520

5,280,420

24,100

[1],[2]

'

'

'

'

'

'

'

'

Currency adjustment

'

7,899

'

7,899

[1],[2]

'

'

'

'

'

'

'

'

Net earnings to common shareholders

'

'

257,319

'

'

'

'

'

'

'

'

'

Tax benefit for issuance of share-based awards

'

'

1,467

'

'

'

'

'

'

'

'

'

Total equity

'

5,602,414

'

'

'

'

'

'

'

'

'

'

Net earnings attributable to noncontrolling interests

'

-3,760

'

'

3,760

'

'

'

'

'

'

'

Contributions

'

'

'

'

31,076

'

'

'

'

'

'

'

Deconsolidation of asset management company

'

'

'

'

-120,781

'

'

'

'

'

'

'

Balance at Aug. 31, 2014

31,209

'

'

'

31,209

'

'

'

'

'

'

'

Balance at Aug. 31, 2014

'

5,571,205

5,539,206

31,999

[1],[2]

'

'

'

'

'

'

'

'

Balance at May. 31, 2014

'

'

'

'

'

'

'

'

'

'

'

'

Currency adjustment

'

-8,744

'

'

'

'

'

'

'

'

'

'

Total equity

'

5,602,414

'

'

'

'

'

'

'

'

'

'

Net earnings attributable to noncontrolling interests

'

-312

'

'

'

'

'

'

'

'

'

'

Balance at Aug. 31, 2014

31,209

'

'

'

'

'

'

'

'

'

'

'

Balance at Aug. 31, 2014

'

$5,571,205

'

'

'

'

'

'

'

'

'

'

[1]

The components of other comprehensive income (loss) are attributable to Jefferies Group LLC (formerly Jefferies Group, Inc.). None of the components of other comprehensive income (loss) are attributable to noncontrolling interests.

[2]

There were no reclassifications out of Accumulated other comprehensive income during the nine months ended August 31, 2014 and nine months ended November 30, 2013.

[3]

Includes grants related to the Incentive Plan, Deferred Compensation Plan and Directors' Plan.

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical) (USD $)	Aug. 31, 2014	Nov. 30, 2013	Feb. 28, 2013
	Successor [Member]	Successor [Member]	Predecessor [Member]
Common stock, par value	$0.00	$0.00	$0.00

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended	9 Months Ended	3 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2013	Aug. 31, 2014	Feb. 28, 2013
	Successor [Member]	Successor [Member]	Predecessor [Member]
Cash flows from operating activities:	'	'	'
Net earnings	$55,135	$261,079	$90,842
Adjustments to reconcile net earnings to net cash (used in) provided by operating activities:	'	'	'
Depreciation and amortization	-1,369	-9,409	17,393
Gain on conversion option	-9,151	-8,142	'
Interest on mandatorily redeemable preferred interests of consolidated subsidiaries	3,368	'	10,961
Accruals related to various benefit plans and stock issuances, net of forfeitures	'	'	23,505
Income on loans to and investments in related parties	-55,194	-73,640	'
Distributions received on investments in related parties	28,335	43,440	'
Other adjustments	-1,815	-33,536	-1,154
Net change in assets and liabilities:	'	'	'
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	269,786	316,049	352,891
Receivables:	'	'	'
Brokers, dealers and clearing organizations	-300,959	-298,153	-1,027,671
Customers	-51,942	-612,457	-130,543
Fees, interest and other	-16,821	-6,687	-29,149
Securities borrowed	-5,251	-908,113	-224,557
Financial instruments owned	2,691,267	-1,955,672	229,394
Loans to and investments in related parties	'	'	-197,166
Investments in managed funds	4,079	9,957	-2,213
Securities purchased under agreements to resell	-846,206	-820,235	-224,418
Other assets	38,339	-26,031	25,489
Payables:	'	'	'
Brokers, dealers and clearing organizations	-727,408	638,448	-1,031,335
Customers	-607,034	730,493	-111,139
Securities loaned	679,305	-40,086	-28,138
Financial instruments sold, not yet purchased	-3,127,918	2,634,241	2,327,667
Securities sold under agreements to repurchase	2,894,054	-252,215	-197,493
Accrued expenses and other liabilities	134,369	14,202	-267,336
Net cash (used in) provided by operating activities	1,046,969	-396,467	-394,170
Cash flows from investing activities:	'	'	'
Contributions to loans to and investments in related parties	-1,133,831	-1,196,634	'
Distributions from loans to and investments in related parties	1,363,755	1,297,139	'
Net payments on premises and equipment	-24,787	-83,968	-10,706
Deconsolidation of asset management entity	'	-137,856	'
Cash received from contingent consideration	2,579	5,215	1,203
Net cash (used in) provided by investing activities	207,716	-116,104	-9,503
Cash flows from financing activities:	'	'	'
Excess tax benefits from the issuance of share-based awards	2,419	1,640	5,682
Proceeds from short-term borrowings	8,053,000	13,566,163	6,744,000
Payments on short-term borrowings	-8,103,000	-13,486,163	-6,794,000
Proceeds from secured credit facility	720,000	1,740,000	900,000
Payments on secured credit facility	-685,000	-1,682,000	-990,007
Net proceeds from other secured financings	105,000	381,955	60,000
Payments on mandatorily redeemable preferred interest of consolidated subsidiaries	-64	'	-61
Payments on repurchase of common stock	'	'	-166,541
Payments on dividends	'	'	-15,799
Proceeds from exercise of stock options, not including tax benefits	'	'	57
Net proceeds from issuance of senior notes, net of issuance costs	'	681,222	991,469
Repayment of long-term debt	'	-250,000	'
Proceeds from contributions of noncontrolling interests	64,610	31,076	'
Payments on distributions to noncontrolling interests	-306,830	'	-1,262
Net cash provided by (used in) financing activities	-149,865	983,893	733,538
Effect of exchange rate changes on cash and cash equivalents	-3,682	2,798	-4,502
Net increase in cash and cash equivalents	1,101,138	474,120	325,363
Cash and cash equivalents at beginning of period	3,017,958	3,561,119	2,692,595
Cash and cash equivalents at end of period	4,119,096	4,035,239	3,017,958
Cash paid (received) during the period for:	'	'	'
Interest	441,652	752,429	178,836
Income taxes paid (refunds), net	$26,037	$117,300	($34,054)

Organization_and_Basis_of_Pres

Organization and Basis of Presentation	9 Months Ended
	Aug. 31, 2014
Accounting Policies [Abstract]	'
Organization and Basis of Presentation	'
	Note 1. Organization and Basis of Presentation
	Organization
	Jefferies Group LLC and its subsidiaries operate as a global full service, integrated securities and investment banking firm. Jefferies Group LLC was previously known as Jefferies Group, Inc., which on March 1, 2013 was converted into a limited liability company and renamed Jefferies Group LLC. In addition, certain subsidiaries of Jefferies Group, Inc. also converted into limited liability companies. The accompanying Consolidated Financial Statements therefore refer to Jefferies Group LLC and represent the accounts of Jefferies Group, Inc., as it was formerly known, and all our subsidiaries (together “we” or “us”). The subsidiaries of Jefferies Group LLC include Jefferies LLC (“Jefferies”), Jefferies Execution Services, Inc. (“Jefferies Execution”), Jefferies Bache, LLC, Jefferies International Limited, Jefferies Bache Limited, Jefferies Hong Kong Limited, Jefferies Bache Financial Services, Inc., Jefferies Mortgage Funding, LLC and Jefferies Leveraged Credit Products, LLC and all other entities in which we have a controlling financial interest or are the primary beneficiary.
	On March 1, 2013, Jefferies Group LLC, through a series of transactions, became an indirect wholly owned subsidiary of Leucadia National Corporation (“Leucadia”) (referred to herein as the “Leucadia Transaction”). Each outstanding share of Jefferies Group LLC was converted into 0.81 of a share of Leucadia common stock (the “Exchange Ratio”). Leucadia did not assume nor guarantee any of our outstanding debt securities. Our 3.875% Convertible Senior Debentures due 2029 are now convertible into Leucadia common shares at a price that reflects the Exchange Ratio and the 3.25% Series A Convertible Cumulative Preferred Stock of Jefferies Group, Inc. was exchanged for a comparable series of convertible preferred shares of Leucadia. Jefferies Group LLC continues to operate as a full-service investment banking firm and as the holding company of its various regulated and unregulated operating subsidiaries, retain a credit rating separate from Leucadia and remain an SEC reporting company, filing annual, quarterly and periodic financial reports. Richard Handler, our Chief Executive Officer and Chairman, was also appointed the Chief Executive Officer of Leucadia, as well as a Director of Leucadia. Brian P. Friedman, our Chairman of the Executive Committee, was appointed Leucadia’s President and a Director of Leucadia.
	We operate in two business segments, Capital Markets and Asset Management. Capital Markets, which represents substantially our entire business, includes our securities, commodities, futures and foreign exchange trading and investment banking activities, which provides the research, sales, trading, origination and advisory effort for various equity, fixed income and advisory products and services. Asset Management provides investment management services to various private investment funds and separate accounts.
	On September 1, 2014, Jefferies Bache, LLC merged with and into Jefferies (a U.S. broker-dealer), with Jefferies as the surviving entity. In addition, on April 1, 2013, we merged Jefferies High Yield Trading, LLC (our high yield trading broker-dealer) with Jefferies and our high yield activities are now conducted by Jefferies. In addition, during the three months ended May 31, 2013, we redeemed the third party interests in our high yield joint venture.
	Basis of Presentation
	The accompanying Consolidated Financial Statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and should be read in conjunction with our Annual Report on Form 10-K for the year ended November 30, 2013.
	As more fully described in Note 4, Leucadia and Related Transactions, the Leucadia Transaction is accounted for using the acquisition method of accounting, which requires that the assets, including identifiable intangible assets, and liabilities of Jefferies Group LLC be recorded at their fair values. The application of the acquisition method of accounting has been pushed down and reflected in the financial statements of Jefferies Group LLC as a wholly-owned subsidiary of Leucadia. The application of push down accounting represents the termination of the prior reporting entity and the creation of a new reporting entity, which do not have the same bases of accounting. As a result, our consolidated financial statements are presented for periods subsequent to March 1, 2013 for the new reporting entity
	(the “Successor”), and before March 1, 2013 for the prior reporting entity (the “Predecessor.”) The Predecessor and Successor periods are separated by a vertical line to highlight the fact that the financial information for such periods has been prepared under two different cost bases of accounting.
	We have made a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities to prepare these financial statements in conformity with U.S. GAAP. The most important of these estimates and assumptions relate to fair value measurements, compensation and benefits, goodwill and intangible assets, the ability to realize deferred tax assets and the recognition and measurement of uncertain tax positions. Although these and other estimates and assumptions are based on the best available information, actual results could be materially different from these estimates.
	Cash Flow Statement Presentation
	Amounts relating to loans and investments in related parties are classified as components of investing activities on the Consolidated Statements of Cash Flows to conform to the presentation of our Parent company in connection with the establishment of a new accounting entity through the application of push down accounting. These amounts are classified by the Predecessor entity as operating activities for reporting periods prior to the Leucadia Transaction.
	Consolidation
	Our policy is to consolidate all entities in which we control by ownership a majority of the outstanding voting stock. In addition, we consolidate entities which meet the definition of a variable interest entity (“VIE”) for which we are the primary beneficiary. The primary beneficiary is the party who has the power to direct the activities of a VIE that most significantly impact the entity’s economic performance and who has an obligation to absorb losses of the entity or a right to receive benefits from the entity that could potentially be significant to the entity. For consolidated entities that are less than wholly owned, the third-party’s holding of equity interest is presented as Noncontrolling interests in the Consolidated Statements of Financial Condition and Consolidated Statements of Changes in Equity. The portion of net earnings attributable to the noncontrolling interests are presented as Net earnings to noncontrolling interests in the Consolidated Statements of Earnings.
	In situations where we have significant influence, but not control, of an entity that does not qualify as a variable interest entity, we apply either the equity method of accounting or fair value accounting pursuant to the fair value option election under U.S. GAAP, with our portion of net earnings or gains and losses recorded within Other revenues or Principal transaction revenues, respectively. We also have formed nonconsolidated investment vehicles with third-party investors that are typically organized as partnerships or limited liability companies and are carried at fair value. We act as general partner or managing member for these investment vehicles and have generally provided the third-party investors with termination or “kick-out” rights.
	Intercompany accounts and transactions are eliminated in consolidation.
	Immaterial Adjustments
	We have made correcting adjustments (referred to as “adjustments”) to our financial statements at November 30, 2013. The first adjustment relates to a decrease of $88.7 million to Receivables from customers and a corresponding increase to Receivables from brokers, dealers and clearing organizations. The second adjustment relates to a decrease of $39.4 million to Payables from customers and a corresponding increase to Payables from brokers, dealers and clearing organizations. These adjustments were made in order to classify amounts arising from unsettled securities transactions with other broker dealers. We do not believe these adjustments are material to our financial statements for any previously reported period.
	As indicated in our Quarterly Report on Form 10-Q for the three months ended August 31, 2013 and our Annual Report on Form 10-K for the year ended November 30, 2013, we have made adjustments to our historical financial statements for the first and second quarter of 2013. We do not believe these adjustments are material to our financial statements for the quarterly periods ended May 31, 2013 and February 28, 2013. For additional information on these adjustments, see Note 1, Organization and Basis of Presentation, and Note 26, Selected Quarterly Financial Data (Unaudited), of the Consolidated Financial Statements of our Annual Report on Form 10-K for the year ended November 30, 2013.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	9 Months Ended
	Aug. 31, 2014
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	Note 2. Summary of Significant Accounting Policies
	Revenue Recognition Policies
	Commissions. All customer securities transactions are reported on the Consolidated Statements of Financial Condition on a settlement date basis with related income reported on a trade-date basis. We permit institutional customers to allocate a portion of their gross commissions to pay for research products and other services provided by third parties. The amounts allocated for those purposes are commonly referred to as soft dollar arrangements. These arrangements are accounted for on an accrual basis and, as we are not the primary obligor for these arrangements, netted against commission revenues in the Consolidated Statements of Earnings. The commissions and related expenses on client transactions executed by Jefferies Bache, LLC, a futures commission merchant, are recorded on a half-turn basis.
	Principal Transactions. Financial instruments owned and Financial instruments sold, but not yet purchased (all of which are recorded on a trade-date basis) are carried at fair value with gains and losses reflected in Principal transactions in the Consolidated Statements of Earnings on a trade date basis. Fees received on loans carried at fair value are also recorded within Principal transactions.
	Investment Banking. Underwriting revenues and fees from mergers and acquisitions, restructuring and other investment banking advisory assignments or engagements are recorded when the services related to the underlying transactions are completed under the terms of the assignment or engagement. Expenses associated with such assignments are deferred until reimbursed by the client, the related revenue is recognized or the engagement is otherwise concluded. Expenses are recorded net of client reimbursements and netted against revenues. Unreimbursed expenses with no related revenues are included in Business development and Professional services expenses in the Consolidated Statements of Earnings.
	Asset Management Fees and Investment Income From Managed Funds. Asset management fees and investment income from managed funds include revenues we earn from management, administrative and performance fees from funds and accounts managed by us, revenues from management and performance fees we earn from related-party managed funds and investment income from our investments in these funds. We earn fees in connection with management and investment advisory services performed for various funds and managed accounts. These fees are based on assets under management or an agreed upon notional amount and may include performance fees based upon the performance of the funds. Management and administrative fees are generally recognized over the period that the related service is provided. Generally, performance fees are earned when the return on assets under management exceeds certain benchmark returns, “high-water marks” or other performance targets. Performance fees are accrued (or reversed) on a monthly basis based on measuring performance to date versus any relevant benchmark return hurdles stated in the investment management agreement. Performance fees are not subject to adjustment once the measurement period ends (generally annual periods) and the performance fees have been realized.
	Interest Revenue and Expense. We recognize contractual interest on Financial instruments owned and Financial instruments sold, but not yet purchased, on an accrual basis as a component of interest revenue and expense. Interest flows on derivative trading transactions and dividends are included as part of the fair valuation of these contracts and recognized in Principal transactions in the Consolidated Statements of Earnings rather than as a component of interest revenue or expense. We account for our short- and long-term borrowings on an accrual basis with related interest recorded as Interest expense. Discounts/premiums arising on our long-term debt are accreted/amortized to Interest expense using the effective yield method over the remaining lives of the underlying debt obligations. In addition, we recognize interest revenue related to our securities borrowed and securities purchased under agreements to resell activities and interest expense related to our securities loaned and securities sold under agreements to repurchase activities on an accrual basis.
	Cash Equivalents
	Cash equivalents include highly liquid investments, including certificates of deposit and money market funds, not held for resale with original maturities of three months or less.
	Cash and Securities Segregated and on Deposit for Regulatory Purposes or Deposited With Clearing and Depository Organizations
	In accordance with Rule 15c3-3 of the Securities Exchange Act of 1934, Jefferies as a broker-dealer carrying client accounts, is subject to requirements related to maintaining cash or qualified securities in a segregated reserve account for the exclusive benefit of its clients. In addition, certain financial instruments used for initial and variation margin purposes with clearing and depository organizations are recorded in this caption. Jefferies Bache, LLC, as a futures commission merchant, is obligated by rules mandated by the Commodities Futures Trading Commission under the Commodities Exchange Act, to segregate or set aside cash or qualified securities to satisfy such regulations, which regulations have been promulgated to protect customer assets. Certain other entities are also obligated by rules mandated by their primary regulators to segregate or set aside cash or equivalent securities to satisfy regulations, promulgated to protect customer assets.
	Financial Instruments
	Financial instruments owned and Financial instruments sold, not yet purchased are recorded at fair value, either as required by accounting pronouncements or through the fair value option election. These instruments primarily represent our trading activities and include both cash and derivative products. Gains and losses are recognized in Principal transactions in our Consolidated Statements of Earnings. The fair value of a financial instrument is the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (the exit price).
	Fair Value Hierarchy
	In determining fair value, we maximize the use of observable inputs and minimize the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from independent sources. Unobservable inputs reflect our assumptions that market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. We apply a hierarchy to categorize our fair value measurements broken down into three levels based on the transparency of inputs as follows:
	Level 1:	Quoted prices are available in active markets for identical assets or liabilities at the reported date.
	Level 2:	Pricing inputs are other than quoted prices in active markets, which are either directly or indirectly observable as of the reported date. The nature of these financial instruments include cash instruments for which quoted prices are available but traded less frequently, derivative instruments whose fair value have been derived using a model where inputs to the model are directly observable in the market, or can be derived principally from or corroborated by observable market data, and instruments that are fair valued using other financial instruments, the parameters of which can be directly observed.
	Level 3:	Instruments that have little to no pricing observability at the reported date. These financial instruments are measured using management’s best estimate of fair value, where the inputs into the determination of fair value require significant management judgment or estimation.
	Financial instruments are valued at quoted market prices, if available. Certain financial instruments have bid and ask prices that can be observed in the marketplace. For financial instruments whose inputs are based on bid-ask prices, the financial instrument is valued at the point within the bid-ask range that meets our best estimate of fair value. We use prices and inputs that are current at the measurement date. For financial instruments that do not have readily determinable fair values using quoted market prices, the determination of fair value is based upon consideration of available information, including types of financial instruments, current financial information, restrictions on dispositions, fair values of underlying financial instruments and quotations for similar instruments.
	The valuation of financial instruments may include the use of valuation models and other techniques. Adjustments to valuations derived from valuation models may be made when, in management’s judgment, features of the financial instrument such as its complexity, the market in which the financial instrument is traded and risk uncertainties about market conditions require that an adjustment be made to the value derived from the models. Adjustments from the price derived from a valuation model reflect management’s judgment that other participants in the market for the financial instrument being measured at fair value would also consider in valuing that same financial instrument. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment.
	The availability of observable inputs can vary and is affected by a wide variety of factors, including, for example, the type of financial instrument and market conditions. As the observability of prices and inputs may change for a financial instrument from period to period, this condition may cause a transfer of an instrument among the fair value hierarchy levels. Transfers among the levels are recognized at the beginning of each period. The degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3.
	Valuation Process for Financial Instruments
	Our Independent Price Verification (“IPV”) Group, which is part of our Finance department, in partnership with Risk Management, is responsible for establishing our valuation policies and procedures. The IPV Group and Risk Management, which are independent of our business functions, play an important role and serve as a control function in determining that our financial instruments are appropriately valued and that fair value measurements are reliable. This is particularly important where prices or valuations that require inputs are less observable. In the event that observable inputs are not available, the control processes are designed to assure that the valuation approach utilized is appropriate and consistently applied and that the assumptions are reasonable. The IPV Group reports to the Global Controller and is subject to the oversight of the IPV Committee, which is comprised of our Chief Financial Officer, Global Controller, Global Head of Product Control, Chief Risk Officer and Principal Accounting Officer, among other personnel. Our independent price verification policies and procedures are reviewed, at a minimum, annually and changes to the policies require the approval of the IPV Committee.
	Price Testing Process. The business units are responsible for determining the fair value of our financial instruments using approved valuation models and methodologies. In order to ensure that the business unit valuations represent a fair value exit price, the IPV Group tests and validates the fair value of our financial instruments inventory. In the testing process, the IPV Group obtains prices and valuation inputs from sources independent of Jefferies, consistently adheres to established procedures set forth in our valuation policies for sourcing prices and valuation inputs and utilizing valuation methodologies. Sources used to validate fair value prices and inputs include, but are not limited to, exchange data, recently executed transactions, pricing data obtained from third party vendors, pricing and valuation services, broker quotes and observed comparable transactions.
	To the extent discrepancies between the business unit valuations and the pricing or valuations resulting from the price testing process are identified, such discrepancies are investigated by the IPV Group and fair values are adjusted, as appropriate. The IPV Group maintains documentation of its testing, results, rationale and recommendations and prepares a monthly summary of its valuation results. This process also forms the basis for our classification of fair values within the fair value hierarchy (i.e., Level 1, Level 2 or Level 3). The IPV Group utilizes the additional expertise of Risk Management personnel in valuing more complex financial instruments and financial instruments with less or limited pricing observability. The results of the valuation testing are reported to the IPV Committee on a monthly basis, which discusses the results and is charged with the final conclusions as to the financial instrument fair values in the consolidated financial statements. This process specifically assists the Chief Financial Officer in asserting as to the fair presentation of our financial condition and results of operations as included within our Quarterly Reports on Form 10-Q and Annual Report on Form 10-K. At each quarter end, the overall valuation results, as concluded upon by the IPV Committee, are presented to the Audit Committee.
	Judgment exercised in determining Level 3 fair value measurements is supplemented by daily analysis of profit and loss performed by the Product Control functions. Gains and losses, which result from changes in fair value, are evaluated and corroborated daily based on an understanding of each of the trading desks’ overall risk positions and developments in a particular market on the given day. Valuation techniques generally rely on recent transactions of suitably comparable financial instruments and use the observable inputs from those comparable transactions as a validation basis for Level 3 inputs. Level 3 fair value measurements are further validated through subsequent sales testing and market comparable sales, if such information is available. Level 3 fair value measurements require documentation of the valuation rationale applied, which is reviewed for consistency in application from period to period; and the documentation includes benchmarking the assumptions underlying the valuation rationale against relevant analytic data.
	Third Party Pricing Information. Pricing information obtained from external data providers (including independent pricing services and brokers) may incorporate a range of market quotes from dealers, recent market transactions and benchmarking model derived prices to quoted market prices and trade data for comparable securities. External pricing data is subject to evaluation for reasonableness by the IPV Group using a variety of means including comparisons of prices to those of similar product types, quality and maturities, consideration of the narrowness or wideness of the range of prices obtained, knowledge of recent market transactions and an assessment of the similarity in prices to comparable dealer offerings in a recent time period. We have a process whereby we challenge the appropriateness of pricing information obtained from external data providers (including independent pricing services and brokers) in order to validate the data for consistency with the definition of a fair value exit price. Our process includes understanding and evaluating the external data providers’ valuation methodologies. For corporate, U.S. government and agency and municipal debt securities, and loans, to the extent independent pricing services or broker quotes are utilized in our valuation process, the vendor service providers are collecting and aggregating observable market information as to recent trade activity and active bid-ask submissions. The composite pricing information received from the independent pricing service is thus not based on unobservable inputs or proprietary models. For mortgage- and other asset-backed securities and collateralized debt obligations, our independent pricing service uses a matrix evaluation approach incorporating both observable yield curves and market yields on comparable securities as well as implied inputs from observed trades for comparable securities in order to determine prepayment speeds, cumulative default rates and loss severity. Further, we consider pricing data from multiple service providers as available as well as compare pricing data to prices we have observed for recent transactions, if any, in order to corroborate our valuation inputs.
	Model Review Process. Where a pricing model is to be used to determine fair value, the pricing model is reviewed for theoretical soundness and appropriateness by Risk Management, independent from the trading desks, and then approved by Risk Management to be used in the valuation process. Review and approval of a model for use may include benchmarking the model against relevant third party valuations, testing sample trades in the model, backtesting the results of the model against actual trades and stress-testing the sensitivity of the pricing model using varying inputs and assumptions. In addition, recently executed comparable transactions and other observable market data are considered for purposes of validating assumptions underlying the model. Models are independently reviewed and validated by Risk Management annually or more frequently if market conditions or use of the valuation model changes.
	Investments in Managed Funds
	Investments in managed funds include our investments in funds managed by us and our investments in related-party managed funds in which we are entitled to a portion of the management and/or performance fees. Investments in nonconsolidated managed funds are accounted for at fair value with gains or losses included in Asset management fees and investment income from managed funds in the Consolidated Statements of Earnings.
	Loans to and Investments in Related Parties
	Loans to and investments in related parties include investments in private equity and other operating entities made in connection with our capital markets activities in which we exercise significant influence over operating and capital decisions and loans issued in connection with such activities. Loans to and investments in related parties are accounted for using the equity method or at cost, as appropriate. Revenues on Loans to and investments in related parties are included in Other revenues in the Consolidated Statements of Earnings. See Note 10, Investments, and Note 22, Related Party Transactions, for additional information regarding certain of these investments.
	Receivable from and Payable to Customers
	Receivable from and payable to customers includes amounts receivable and payable on cash and margin transactions. Securities owned by customers and held as collateral for these receivables are not reflected in the accompanying consolidated financial statements. Receivable from officers and directors included within this financial statement line item represents balances arising from their individual security transactions. These transactions are subject to the same regulations as customer transactions and are provided on substantially the same terms.
	Securities Borrowed and Securities Loaned
	Securities borrowed and securities loaned are carried at the amounts of cash collateral advanced and received in connection with the transactions and accounted for as collateralized financing transactions. In connection with both trading and brokerage activities, we borrow securities to cover short sales and to complete transactions in which customers have failed to deliver securities by the required settlement date, and lend securities to other brokers and dealers for similar purposes. We have an active securities borrowed and lending matched book business in which we borrow securities from one party and lend them to another party. When we borrow securities, we generally provide cash to the lender as collateral, which is reflected in our Consolidated Statements of Financial Condition as Securities borrowed. We earn interest revenues on this cash collateral. Similarly, when we lend securities to another party, that party provides cash to us as collateral, which is reflected in our Consolidated Statements of Financial Condition as Securities loaned. We pay interest expense on the cash collateral received from the party borrowing the securities. The initial collateral advanced or received approximates or is greater than the fair value of the securities borrowed or loaned. We monitor the fair value of the securities borrowed and loaned on a daily basis and request additional collateral or return excess collateral, as appropriate.
	Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase
	Securities purchased under agreements to resell and Securities sold under agreements to repurchase (collectively “repos”) are accounted for as collateralized financing transactions and are recorded at their contracted resale or repurchase amount plus accrued interest. We earn and incur interest over the term of the repo, which is reflected in Interest income and Interest expense on our Consolidated Statements of Earnings on an accrual basis. Repos are presented in the Consolidated Statements of Financial Condition on a net-basis-by counterparty, where permitted by generally accepted accounting principles. We monitor the fair value of the underlying securities daily versus the related receivable or payable balances. Should the fair value of the underlying securities decline or increase, additional collateral is requested or excess collateral is returned, as appropriate.
	Premises and Equipment
	Premises and equipment are depreciated using the straight-line method over the estimated useful lives of the related assets (generally three to ten years). Leasehold improvements are amortized using the straight-line method over the term of the related leases or the estimated useful lives of the assets, whichever is shorter. Premises and equipment includes internally developed software, which was increased to its fair market value in the allocation of the purchase price on March 1, 2013. The revised carrying values of internally developed software ready for its intended use are depreciated over the remaining useful life. See Note 4, Leucadia and Related Transactions for more information regarding the allocation of the purchase price.
	Goodwill and Intangible Assets
	Goodwill. Goodwill represents the excess acquisition cost over the fair value of net tangible and intangible assets acquired. Goodwill is not amortized and is subject to annual impairment testing on August 1 or between annual tests if an event or change in circumstance occurs that would more likely than not reduce the fair value of a reporting unit below its carrying value. In testing for goodwill impairment, we have the option to first assess qualitative factors to determine whether the existence of events or circumstances lead to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events and circumstances, we conclude that it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then performing the two-step impairment test is not required. If we conclude otherwise, we are required to perform the two-step impairment test. The goodwill impairment test is performed at the reporting unit level by comparing the estimated fair value of a reporting unit with its respective carrying value. If the estimated fair value exceeds the carrying value, goodwill at the reporting unit level is not impaired. If the estimated fair value is less than carrying value, further analysis is necessary to determine the amount of impairment, if any.
	The fair value of reporting units are based on widely accepted valuation techniques that we believe market participants would use, although the valuation process requires significant judgment and often involves the use of significant estimates and assumptions. The methodologies we utilize in estimating the fair value of reporting units include market valuation methods that incorporate price-to-earnings and price-to-book multiples of comparable exchange traded companies and multiples of merger and acquisitions of similar businesses and discounted cash flow methodologies that incorporate an appropriate risk-adjusted discount rate. The estimates and assumptions used in determining fair value could have a significant effect on whether or not an impairment charge is recorded and the magnitude of such a charge. Adverse market or economic events could result in impairment charges in future periods.
	Intangible Assets. Intangible assets deemed to have finite lives are amortized on a straight line basis over their estimated useful lives, where the useful life is the period over which the asset is expected to contribute directly, or indirectly, to our future cash flows. Intangible assets are reviewed for impairment on an interim basis when certain events or circumstances exist. For amortizable intangible assets, impairment exists when the carrying amount of the intangible asset exceeds its fair value. At least annually, the remaining useful life is evaluated.
	An intangible asset with an indefinite useful life is not amortized but assessed for impairment annually, or more frequently, when events or changes in circumstances occur indicating that it is more likely than not that the indefinite-lived asset is impaired. Impairment exists when the carrying amount exceeds its fair value. In testing for impairment, we have the option to first perform a qualitative assessment to determine whether it is more likely than not that an impairment exists. If it is determined that it is not more likely than not that an impairment exists, a quantitative impairment test is not necessary. If we conclude otherwise, we are required to perform a quantitative impairment test. Our annual indefinite-lived intangible asset impairment testing date is August 1.
	To the extent an impairment loss is recognized, the loss establishes the new cost basis of the asset that is amortized over the remaining useful life of that asset, if any. Subsequent reversal of impairment losses is not permitted.
	Refer to Note 11, Goodwill and Other Intangible Assets, for further information.
	Income Taxes
	Prior to the Leucadia Transaction, we filed a consolidated U.S. federal income tax return, which included all of our qualifying subsidiaries. Subsequently, our results of operations are included in the consolidated federal and applicable state income tax returns filed by Leucadia. In states that neither accept nor require combined or unitary tax returns, certain subsidiaries file separate state income tax returns. We also are subject to income tax in various foreign jurisdictions in which we operate. We account for our provision for income taxes using a “separate return” method. Amounts provided for income taxes are based on income reported for financial statement purposes and do not necessarily represent amounts currently payable.
	Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and for tax loss carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. Under acquisition accounting, the recognition of certain assets and liabilities at fair value created a change in the financial reporting basis for our assets and liabilities, while the tax basis of our assets and liabilities remained the same. As a result, deferred tax assets and liabilities were recognized for the change in the basis differences. Jefferies provides deferred taxes on its temporary differences and on any carryforwards that it could claim on its hypothetical tax return. The realization of deferred tax assets is assessed and a valuation allowance is recorded to the extent that it is more likely than not that any portion of the deferred tax asset will not be realized on the basis of its projected separate return results. The tax benefit related to Leucadia dividends and dividend equivalents paid on nonvested share-based payment awards are recognized as an increase to Additional paid-in capital. These amounts are included in tax benefits for issuance of share-based awards on the Consolidated Statements of Changes in Equity.
	We record uncertain tax positions using a two-step process: (i) we determine whether it is more likely than not that each tax position will be sustained on the basis of the technical merits of the position; and (ii) for those tax positions that meet the more-likely-than-not recognition threshold, we recognize the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority.
	Legal Reserves
	In the normal course of business, we have been named, from time to time, as a defendant in legal and regulatory proceedings. We are also involved, from time to time, in other exams, investigations and similar reviews (both formal and informal) by governmental and self-regulatory agencies regarding our businesses, certain of which may result in judgments, settlements, fines, penalties or other injunctions.
	We recognize a liability for a contingency in Accrued expenses and other liabilities when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. If the reasonable estimate of a probable loss is a range, we accrue the most likely amount of such loss, and if such amount is not determinable, then we accrue the minimum in the range as the loss accrual. The determination of the outcome and loss estimates requires significant judgment on the part of management. At August 31, 2014, we have reserved approximately $3.1 million for remaining payments under a non-prosecution agreement with the United States Attorney for the District of Connecticut and a settlement agreement with the Securities and Exchange Commission, both with respect to an investigation of certain purchases and sales of mortgage-backed securities. We believe that any other matters for which we have determined a loss to be probable and reasonably estimable are not material to the consolidated financial statements.
	In many instances, it is not possible to determine whether any loss is probable or even possible or to estimate the amount of any loss or the size of any range of loss. We believe that, in the aggregate, the pending legal actions or regulatory proceedings and any other exams, investigations or similar reviews (both formal and informal) should not have a material adverse effect on our consolidated results of operations, cash flows or financial condition. In addition, we believe that any amount that could be reasonably estimated of potential loss or range of potential loss in excess of what has been provided in the consolidated financial statements is not material.
	Share-based Compensation
	Share-based awards are measured based on the grant-date fair value of the award and recognized over the period from the service inception date through the date the employee is no longer required to provide service to earn the award. Expected forfeitures are included in determining share-based compensation expense.
	Foreign Currency Translation
	Assets and liabilities of foreign subsidiaries having non-U.S. dollar functional currencies are translated at exchange rates at the end of a period. Revenues and expenses are translated at average exchange rates during the period. The gains or losses resulting from translating foreign currency financial statements into U.S. dollars, net of hedging gains or losses and taxes, if any, are included in Other comprehensive income. Gains or losses resulting from foreign currency transactions are included in Principal transactions in the Consolidated Statements of Earnings.
	Earnings per Common Share
	As a single member limited liability company, earnings per share is not calculated for Jefferies Group LLC (the Successor company).
	Prior to the Leucadia Transaction, Jefferies Group, Inc. (the Predecessor company) had common shares and other common share equivalents outstanding. For the Predecessor periods, basic earnings per share (“EPS”) is computed by dividing net earnings available to common shareholders by the weighted average number of common shares outstanding and certain other shares committed to be, but not yet issued. Net earnings available to common shareholders represent net earnings to common shareholders reduced by the allocation of earnings to participating securities. Losses are not allocated to participating securities. For Predecessor periods, diluted EPS is computed by dividing net earnings available to common shareholders plus dividends on dilutive mandatorily redeemable convertible preferred stock by the weighted average number of common shares outstanding and certain other shares committed to be, but not yet issued, plus all dilutive common stock equivalents outstanding during the period. Unvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and, therefore, are included in the earnings allocation in computing earnings per share under the two-class method of earning per share.
	Securitization Activities
We engage in securitization activities related to corporate loans, commercial mortgage loans and mortgage-backed and other asset-backed securities. Such transfers of financial assets are accounted for as sales when we have relinquished control over the transferred assets. The gain or loss on sale of such financial assets depends, in part, on the previous carrying amount of the assets involved in the transfer allocated between the assets sold and the retained interests, if any, based upon their respective fair values at the date of sale. We may retain interests in the securitized financial assets as one or more tranches of the securitization. These retained interests are included within Financial instruments owned in the Consolidated Statements of Financial Condition at fair value. Any changes in the fair value of such retained interests are recognized within Principal transactions revenues in the Consolidated Statements of Earnings.
When a transfer of assets does not meet the criteria of a sale, we account for the transfer as a secured borrowing and continue to recognize the assets of a secured borrowing in Financial instruments owned and recognize the associated financing in Other secured financings in the Consolidated Statements of Financial Condition.

Accounting_Developments

Accounting Developments	9 Months Ended
	Aug. 31, 2014
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]	'
Accounting Developments	'
	Note 3. Accounting Developments
	Adopted Accounting Standards
	Accumulated Other Comprehensive Income. In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. The guidance requires an entity to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under U.S. GAAP to be reclassified in its entirety to net income. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety from accumulated other comprehensive income to net income in the same reporting period, an entity is required to cross-reference to other disclosures required under U.S. GAAP that provide additional detail about those amounts. We adopted the guidance effective March 1, 2013, presenting the additional disclosures within our Consolidated Statements of Changes in Equity. Adoption did not affect our results of operations, financial condition or cash flows.
	Accounting Standards to be Adopted in Future Periods
	Repurchase Agreements. In June 2014, the FASB issued ASU No. 2014-11, Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. The accounting guidance changes the accounting for repurchase-to-maturity transactions and linked repurchase financings to secured borrowing accounting, which is consistent with the accounting for other repurchase agreements. The guidance also requires new disclosures about transfers that are accounted for as sales in transactions that are economically similar to repurchase agreements and increased transparency about the types of collateral pledged in repurchase agreements and similar transactions accounted for as secured borrowings. The guidance is effective prospectively in the second quarter of fiscal 2015. We do not expect this guidance to significantly affect our results of operations, financial condition or cash flows and will provide the additional disclosures in our consolidated financial statements.
	Revenue Recognition. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers. The accounting guidance defines how companies report revenues from contracts with customers, and also requires enhanced disclosures. The guidance is effective beginning in the first quarter of fiscal 2017. We are currently evaluating the impact of the new guidance on our consolidated financial statements.
	Discontinued Operations. In April 2014, the FASB issued ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. The guidance changes the criteria for disposals to qualify as discontinued operations and requires new disclosures about disposals of both discontinued operations and certain other disposals that do not meet the new definition. The guidance is effective beginning in the first quarter of 2015. We do not expect the guidance to have a significant impact on our consolidated financial position or results of operations upon adoption.
	Income Taxes. In July 2013, the FASB issued ASU No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. The guidance requires an entity to net their unrecognized tax benefit, or a portion of an unrecognized tax benefit, in the financial statements against a deferred tax asset for a net operating loss carryforward, a similar tax loss or tax credit carryforward, unless such tax loss or credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes resulting from the disallowance of a tax position. In the event that the tax position is disallowed or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit shall be presented in the financial statements as a liability and shall not be combined with deferred tax assets. The guidance is effective for fiscal years and interim periods within those years, beginning after December 15, 2013, and is to be applied prospectively to all unrecognized tax benefits that exist at the effective date. We do not expect that the adoption of this update will have a material effect on our consolidated financial statements.

Leucadia_and_Related_Transacti

Leucadia and Related Transactions	9 Months Ended
	Aug. 31, 2014
Business Combinations [Abstract]	'
Leucadia and Related Transactions	'
	Note 4. Leucadia and Related Transactions
	Leucadia Transaction
	On March 1, 2013, Jefferies Group LLC completed a business combination with Leucadia and became a wholly-owned subsidiary of Leucadia as described in Note 1, Organization and Basis of Presentation. Each share of Jefferies Group Inc.’s common stock outstanding was converted into common shares of Leucadia at an Exchange Ratio of 0.81 of a Leucadia common share for each share of Jefferies Group, Inc. (the “Exchange Ratio”). Leucadia exchanged Jefferies Group, Inc.’s $125.0 million 3.25% Series A-1 Convertible Cumulative Preferred Stock for a new series of Leucadia $125.0 million 3.25% Cumulative Convertible Preferred Shares. In addition, each restricted share and restricted stock unit of Jefferies Group, Inc. common stock was converted at the Exchange Ratio, into an equivalent award of shares of Leucadia, with all such awards for Leucadia shares subject to the same terms and conditions, including, without limitation, vesting and, in the case of performance-based restricted stock units, performance being measured at existing targets.
	Leucadia did not assume or guarantee any of our outstanding debt securities, but our 3.875% Convertible senior Debentures due 2029 with an aggregate principal amount of $345.0 million became convertible into common shares of Leucadia. Other than the conversion into Leucadia common shares, the terms of the debenture remain the same.
	The Leucadia Transaction resulted in a change in our ownership and was recorded under the acquisition method of accounting by Leucadia and pushed-down to us by allocating the total purchase consideration of $4.8 billion to the cost of the assets acquired, including intangible assets, and liabilities assumed based on their estimated fair values. The excess of the total purchase price over the fair value of assets acquired and the liabilities assumed is recorded as goodwill. The goodwill arising from the Leucadia Transaction consists largely of our commercial potential and the value of our assembled workforce.
	In connection with the Leucadia Transaction, we recognized $9.0 million and $2.1 million in transaction costs during the three months ended May 31, 2013 and February 28, 2013, respectively.
	The summary computation of the purchase price and the fair values assigned to the assets and liabilities are presented as follows (in thousands except share amounts):
	Purchase Price
	Jefferies common stock outstanding			205,368,031
	Less: Jefferies common stock owned by Leucadia			(58,006,024	)
	Jefferies common stock acquired by Leucadia			147,362,007
	Exchange ratio			0.81
	Leucadia’s shares issued (excluding for Jefferies shares held by Leucadia)			119,363,226
	Less: restricted shares issued for share-based payment awards (1)			(6,894,856	)
	Leucadia’s shares issued, excluding share-based payment awards			112,468,370
	Closing price of Leucadia’s common stock (2)		$	26.9
	Fair value of common shares acquired by Leucadia			3,025,399
	Fair value of 3.25% cumulative convertible preferred shares (3)			125,000
	Fair value of shares-based payment awards (4)			343,811
	Fair value of Jefferies shares owned by Leucadia (5)			1,259,891
	Total purchase price		$	4,754,101
	-1	Represents shares of restricted stock included in Jefferies common stock outstanding that contained a future service requirement at March 1, 2013.
	-2	The value of the shares of common stock exchanged with Jefferies shareholders was based upon the closing price of Leucadia’s common stock at February 28, 2013, the last trading day prior to the date of acquisition.
	-3	Represents Leucadia’s 3.25% Cumulative Convertible Preferred Shares issued in exchange for Jefferies Group, Inc.’s 3.25% Series A-1 Convertible Cumulative Preferred Stock.
	-4	The fair value of share-based payment awards is calculated in accordance with ASC 718, Compensation – Stock Compensation. Share-based payment awards attributable to pre-combination service are included as part of the total purchase price. Share-based payment awards attributable to pre-combination service is estimated based on the ratio of the pre-combination service performed to the original service period of the award.
	-5	The fair value of Jefferies shares owned by Leucadia was based upon a price of $21.72, the closing price of Jefferies common stock at February 28, 2013.
	Assets acquired:
	Cash and cash equivalents		$	3,017,958
	Cash and securities segregated			3,728,742
	Financial instruments owned, at fair value			16,413,535
	Investments in managed funds			59,976
	Loans to and investments in related parties			766,893
	Securities borrowed			5,315,488
	Securities purchased under agreements to resell			3,578,366
	Securities received as collateral			25,338
	Receivables:
	Brokers, dealers and clearing organizations			2,444,085
	Customers			1,045,251
	Fees, interest and other			225,555
	Premises and equipment			192,603
	Indefinite-lived intangible exchange memberships and licenses (1)			15,551
	Finite-lived intangible customer relationships (1)			136,002
	Finite-lived trade name (1)			131,299
	Other assets			939,600
	Total assets		$	38,036,242
	Liabilities assumed:
	Short-term borrowings		$	100,000
	Financial instruments sold, not yet purchased, at fair value			9,766,876
	Securities loaned			1,902,687
	Securities sold under agreements to repurchase			7,976,492
	Other secured financings			122,294
	Obligation to return securities received as collateral			25,338
	Payables:
	Brokers, dealers and clearing organizations			1,787,055
	Customers			5,450,781
	Accrued expenses and other liabilities			793,843
	Long-term debt			6,362,024
	Mandatorily redeemable preferred interests			358,951
	Total liabilities		$	34,646,341
	Noncontrolling interests			356,180
	Fair value of net assets acquired, excluding goodwill		$	3,033,721
	Goodwill		$	1,720,380
	-1	Intangible assets are recorded within Other assets on the Consolidated Statements of Financial Condition.
The goodwill of $1.7 billion is not deductible for tax purposes.
Reorganization of Jefferies High Yield Holdings, LLC
On March 1, 2013, we commenced a reorganization of our high yield joint venture with Leucadia, conducted through Jefferies High Yield Holdings, LLC (“JHYH”) (the parent of Jefferies High Yield Trading, LLC (our high yield trading broker-dealer)). On March 1, 2013, we redeemed the outstanding third party noncontrolling interests in JHYH of $347.6 million. On March 31, 2013, Leucadia contributed its mandatorily redeemable preferred interests in JHYH of $362.3 million to Jefferies Group LLC as member’s equity. On April 1, 2013, we redeemed the mandatorily redeemable preferred interests in JHYH received from Leucadia. In addition, on April 1, 2013, our high yield trading broker-dealer was merged into Jefferies LLC (our U.S. securities broker-dealer).

Fair_Value_Disclosures

Fair Value Disclosures	9 Months Ended
	Aug. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Disclosures	'
	Note 5. Fair Value Disclosures
	The following is a summary of our financial assets and liabilities that are accounted for at fair value on a recurring basis at August 31, 2014 and November 30, 2013 by level within the fair value hierarchy (in thousands):
			August 31, 2014
			Level 1(1)			Level 2(1)			Level 3				Counterparty and			Total
													Cash Collateral
													Netting (2)
	Assets:
	Financial instruments owned:
	Corporate equity securities		$	2,343,374		$	336,954		$	7,777			$	—		$	2,688,105
	Corporate debt securities			—			3,294,075			36,884				—			3,330,959
	Collateralized debt obligations			—			258,442			43,740				—			302,182
	U.S. government and federal agency securities			3,375,064			108,067			2,494				—			3,485,625
	Municipal securities			—			468,656			—				—			468,656
	Sovereign obligations			1,570,726			840,524			—				—			2,411,250
	Residential mortgage-backed securities			—			2,456,612			81,034				—			2,537,646
	Commercial mortgage-backed securities			—			942,224			19,327				—			961,551
	Other asset-backed securities			—			80,556			2,079				—			82,635
	Loans and other receivables			—			1,419,105			188,025				—			1,607,130
	Derivatives			91,950			3,378,352			1,204				(3,112,831	)		358,675
	Investments at fair value			—			5,541			116,387				—			121,928
	Physical commodities			—			63,831			—				—			63,831
	Total financial instruments owned		$	7,381,114		$	13,652,939		$	498,951			$	(3,112,831	)	$	18,420,173
	Level 3 financial instruments for which the firm does not bear economic exposure (3)									(18,948	)
	Level 3 financial instruments for which the firm bears economic exposure								$	480,003
	Cash and cash equivalents		$	4,035,239		$	—		$	—			$	—		$	4,035,239
	Investments in managed funds		$	—		$	19,559		$	58,322			$	—		$	77,881
	Cash and securities segregated and ondeposit for regulatory purposes (4)		$	3,301,185		$	—		$	—			$	—		$	3,301,185
	Securities received as collateral		$	8,326		$	—		$	—			$	—		$	8,326
	Total Level 3 assets								$	538,325
	Liabilities:
	Financial instruments sold, not yet purchased:
	Corporate equity securities		$	1,749,610		$	66,422		$	38			$	—		$	1,816,070
	Corporate debt securities			—			1,617,826			242				—			1,618,068
	Collateralized debt obligations			—			500			—				—			500
	U.S. government and federal agency securities			2,851,698			—			—				—			2,851,698
	Municipal securities			—			—			—				—			—
	Sovereign obligations			1,457,265			824,142			—				—			2,281,407
	Residential mortgage-backed securities			—			3,114			—				—			3,114
	Loans			—			825,758			6,661				—			832,419
	Derivatives			230,856			3,125,513			14,784				(3,104,148	)		267,005
	Physical commodities			—			52,966			—				—			52,966
	Total financial instruments sold, not yet purchased		$	6,289,429		$	6,516,241		$	21,725			$	(3,104,148	)	$	9,723,247
	Obligation to return securities received as collateral		$	8,326		$	—		$	—			$	—		$	8,326
	Other secured financings		$	—		$	—		$	31,666			$	—		$	31,666
	Embedded conversion option		$	—		$	—		$	1,432			$	—		$	1,432
	-1	There were no transfers between Level 1 and Level 2 for the nine months ended August 31, 2014.
	-2	Represents counterparty and cash collateral netting across the levels of the fair value hierarchy for positions with the same counterparty.
	-3	Consists of assets which are financed by nonrecourse secured financing.
	-4	Cash and securities segregated and on deposit for regulatory purposes include U.S. government securities with a fair value of $564.3 million.
			November 30, 2013
			Level 1 (1)			Level 2 (1)			Level 3				Counterparty and			Total
													Cash Collateral
													Netting (2)
	Assets:
	Financial instruments owned:
	Corporate equity securities		$	1,913,220		$	175,493		$	9,884			$	—		$	2,098,597
	Corporate debt securities			—			2,957,102			25,666				—			2,982,768
	Collateralized debt obligations			—			182,095			37,216				—			219,311
	U.S. government and federal agency securities			2,293,221			40,389			—				—			2,333,610
	Municipal securities			—			664,054			—				—			664,054
	Sovereign obligations			1,458,803			889,685			—				—			2,348,488
	Residential mortgage-backed securities			—			2,932,268			105,492				—			3,037,760
	Commercial mortgage-backed securities			—			1,130,410			17,568				—			1,147,978
Other asset-backed securities			—			55,475			12,611				—			68,086
Loans and other receivables			—			1,203,238			145,890				—			1,349,128
Derivatives			40,952			2,472,237			1,493				(2,253,589	)		261,093
Investments at fair value			—			40			101,242				—			101,282
Physical commodities			—			37,888			—				—			37,888
Total financial instruments owned		$	5,706,196		$	12,740,374		$	457,062			$	(2,253,589	)	$	16,650,043
Level 3 financial instruments for which the firm does not bear economic exposure									—
Level 3 financial instruments for which the firm bears economic exposure								$	457,062
Cash and cash equivalents		$	3,561,119		$	—		$	—			$	—		$	3,561,119
Investments in managed funds		$	—		$	—		$	57,285			$	—		$	57,285
Cash and securities segregated and on deposit for regulatory purposes (3)		$	3,616,602		$	—		$	—			$	—		$	3,616,602
Securities received as collateral		$	11,063		$	—		$	—			$	—		$	11,063
Total Level 3 assets								$	514,347
Liabilities:
Financial instruments sold, not yet purchased:
Corporate equity securities		$	1,782,903		$	40,358		$	38			$	—		$	1,823,299
Corporate debt securities			—			1,346,078			—				—			1,346,078
U.S. government and federal agency securities			1,324,326			—			—				—			1,324,326
Sovereign obligations			1,360,269			471,088			—				—			1,831,357
Residential mortgage-backed securities			—			34,691			—				—			34,691
Loans			—			672,838			22,462				—			695,300
Derivatives			43,829			2,480,463			8,398				(2,352,611	)		180,079
Physical commodities			—			36,483			—				—			36,483
Total financial instruments sold, not yet purchased		$	4,511,327		$	5,081,999		$	30,898			$	(2,352,611	)	$	7,271,613
Obligation to return securities received as collateral		$	11,063		$	—		$	—			$	—		$	11,063
Other secured financings		$	—		$	31,000		$	8,711			$	—		$	39,711
Embedded conversion option		$	—		$	—		$	9,574			$	—		$	9,574
-1	During the nine months ended November 30, 2013, we transferred listed equity options with a fair value of $403.0 million within Financial instruments owned and $423.0 million within Financial instruments sold, not yet purchased from Level 1 to Level 2 as adjustments to the exchange closing price are necessary to best reflect the fair value of the population at its exit price.
-2	Represents counterparty and cash collateral netting across the levels of the fair value hierarchy for positions with the same counterparty.
-3	Cash and securities segregated and on deposit for regulatory purposes include U.S. government securities with a fair value of $304.2 million.
The following is a description of the valuation basis, including valuation techniques and inputs, used in measuring our financial assets and liabilities that are accounted for at fair value on a recurring basis:
Corporate Equity Securities
	•		Exchange Traded Equity Securities: Exchange-traded equity securities are measured based on quoted closing exchange prices, which are generally obtained from external pricing services, and are categorized within Level 1 of the fair value hierarchy, otherwise they are categorized within Level 2 or Level 3 of the fair value hierarchy.
	•		Non-exchange Traded Equity Securities: Non-exchange traded equity securities are measured primarily using broker quotations, pricing data from external pricing services and prices observed for recently executed market transactions and are categorized within Level 2 of the fair value hierarchy. Where such information is not available, non-exchange traded equity securities are categorized within Level 3 of the fair value hierarchy and measured using valuation techniques involving quoted prices of or market data for comparable companies, similar company ratios and multiples (e.g., price/EBITDA, price/book value), discounted cash flow analyses and transaction prices observed for subsequent financing or capital issuance by the company. When using pricing data of comparable companies, judgment must be applied to adjust the pricing data to account for differences between the measured security and the comparable security (e.g., issuer market capitalization, yield, dividend rate, geographical concentration).
	•		Equity warrants: Non-exchange traded equity warrants are generally categorized within Level 3 of the fair value hierarchy and are measured using the Black-Scholes model with key inputs impacting the valuation including the underlying security price, implied volatility, dividend yield, interest rate curve, strike price and maturity date.
Corporate Debt Securities
	•		Corporate Bonds: Corporate bonds are measured primarily using pricing data from external pricing services and broker quotations, where available, prices observed for recently executed market transactions and bond spreads or credit default swap spreads of the issuer adjusted for basis differences between the swap curve and the bond curve. Corporate bonds measured using these valuation methods are categorized within Level 2 of the fair value hierarchy. If broker quotes, pricing data or spread data is not available, alternative valuation techniques are used including cash flow models incorporating interest rate curves, single name or index credit default swap curves for comparable issuers and recovery rate assumptions. Corporate bonds measured using alternative valuation techniques are categorized within Level 3 of the fair value hierarchy and comprise a limited portion of our corporate bonds.
	•		High Yield Corporate and Convertible Bonds: A significant portion of our high yield corporate and convertible bonds are categorized within Level 2 of the fair value hierarchy and are measured primarily using broker quotations and pricing data from external pricing services, where available, and prices observed for recently executed market transactions of comparable size. Where pricing data is less observable, valuations are categorized within Level 3 and are based on pending transactions involving the issuer or comparable issuers, prices implied from an issuer’s subsequent financings or recapitalizations, models incorporating financial ratios and projected cash flows of the issuer and market prices for comparable issuers.
Collateralized Debt Obligations
Collateralized debt obligations are measured based on prices observed for recently executed market transactions or based on valuations received from third party brokers and are categorized within Level 2 or Level 3 of the fair value hierarchy depending on the observability and significance of the pricing inputs.
U.S. Government and Federal Agency Securities
	•		U.S. Treasury Securities: U.S. Treasury securities are measured based on quoted market prices and categorized within Level 1 of the fair value hierarchy.
	•		U.S. Agency Issued Debt Securities: Callable and non-callable U.S. agency issued debt securities are measured primarily based on quoted market prices obtained from external pricing services and are generally categorized within Level 1 or Level 2 of the fair value hierarchy.
Municipal Securities
Municipal securities are measured based on quoted prices obtained from external pricing services and are generally categorized within Level 2 of the fair value hierarchy.
Sovereign Obligations
Foreign sovereign government obligations are measured based on quoted market prices obtained from external pricing services, where available, or recently executed independent transactions of comparable size. To the extent external price quotations are not available or recent transactions have not been observed, valuation techniques incorporating interest rate yield curves and country spreads for bonds of similar issuers, seniority and maturity are used to determine fair value of sovereign bonds or obligations. Foreign sovereign government obligations are classified in Level 1, 2 or Level 3 of the fair value hierarchy, primarily based on the country of issuance.
Residential Mortgage-Backed Securities
	•		Agency Residential Mortgage-Backed Securities: Agency residential mortgage-backed securities include mortgage pass-through securities (fixed and adjustable rate), collateralized mortgage obligations and interest-only and principal-only securities and are generally measured using market price quotations from external pricing services and categorized within Level 2 of the fair value hierarchy.
	•		Agency Residential Inverse Interest-Only Securities (“Agency Inverse IOs”): The fair value of agency inverse IOs is estimated using expected future cash flow techniques that incorporate prepayment models and other prepayment assumptions to amortize the underlying mortgage loan collateral. We use prices observed for recently executed transactions to develop market-clearing spread and yield curve assumptions. Valuation inputs with regard to the underlying collateral incorporate weighted average coupon, loan-to-value, credit scores, geographic location, maximum and average loan size, originator, servicer, and weighted average loan age. Agency inverse IOs are categorized within Level 2 or Level 3 of the fair value hierarchy. We also use vendor data in developing our assumptions, as appropriate.
	•		Non-Agency Residential Mortgage-Backed Securities: Fair values are determined primarily using discounted cash flow methodologies and securities are categorized within Level 2 or Level 3 of the fair value hierarchy based on the observability and significance of the pricing inputs used. Performance attributes of the underlying mortgage loans are evaluated to estimate pricing inputs, such as prepayment rates, default rates and the severity of credit losses. Attributes of the underlying mortgage loans that affect the pricing inputs include, but are not limited to, weighted average coupon; average and maximum loan size; loan-to-value; credit scores; documentation type; geographic location; weighted average loan age; originator; servicer; historical prepayment, default and loss severity experience of the mortgage loan pool; and delinquency rate. Yield curves used in the discounted cash flow models are based on observed market prices for comparable securities and published interest rate data to estimate market yields.
Commercial Mortgage-Backed Securities
	•		Agency Commercial Mortgage-Backed Securities: GNMA project loan bonds and FNMA Delegated Underwriting and Servicing (“DUS”) mortgage-backed securities are generally measured by using prices observed for recently executed market transactions to estimate market-clearing spread levels for purposes of estimating fair value. GNMA project loan bonds and FNMA DUS mortgage-backed securities are categorized within Level 2 of the fair value hierarchy.
	•		Non-Agency Commercial Mortgage-Backed Securities: Non-agency commercial mortgage-backed securities are measured using pricing data obtained from external pricing services and prices observed for recently executed market transactions and are categorized within Level 2 and Level 3 of the fair value hierarchy.
Other Asset-Backed Securities
Other asset-backed securities include, but are not limited to, securities backed by auto loans, credit card receivables and student loans and are categorized within Level 2 and Level 3 of the fair value hierarchy. Valuations are determined using pricing data obtained from external pricing services and prices observed for recently executed market transactions.
Loans and Other Receivables
	•		Corporate Loans: Corporate loans categorized within Level 2 of the fair value hierarchy are measured based on market price quotations where market price quotations from external pricing services are supported by market transaction data. Corporate loans categorized within Level 3 of the fair value hierarchy are measured based on market price quotations that are considered to be less transparent, market prices for debt securities of the same creditor, and estimates of future cash flow incorporating assumptions regarding creditor default and recovery rates and consideration of the issuer’s capital structure.
	•		Participation Certificates in GNMA Project and Construction Loans: Valuations of participation certificates in GNMA project and construction loans are based on observed market prices of recently executed purchases of similar loans which are then used to derive a market implied spread, which in turn is used as the primary input in estimating the fair value of loans at the measurement date. The loan participation certificates are categorized within Level 2 of the fair value hierarchy given the observability and volume of recently executed transactions.
	•		Project Loans: Valuation of project loans are based on benchmarks of prices for recently executed transactions of related realized collateralized securities and are categorized within Level 2 of the fair value hierarchy.
	•		Escrow and Trade Claim Receivables: Escrow and trade claim receivables are categorized within Level 3 of the fair value hierarchy where fair value is estimated based on reference to market prices and implied yields of debt securities of the same or similar issuers. Escrow and trade claim receivables are categorized within Level 2 of the fair value hierarchy where fair value is based on recent trade activity in the same security.
Derivatives
	•		Listed Derivative Contracts: Listed derivative contracts that are actively traded are measured based on quoted exchange prices, which are generally obtained from external pricing services, and are categorized within Level 1 of the fair value hierarchy. Listed derivatives for which there is limited trading activity are measured based on incorporating the closing auction price of the underlying equity security, use similar valuation approaches as those applied to over-the-counter derivative contracts and are categorized within Level 2 of the fair value hierarchy.
	•		OTC Derivative Contracts: Over-the-counter (“OTC”) derivative contracts are generally valued using models, whose inputs reflect assumptions that we believe market participants would use in valuing the derivative in a current period transaction. Inputs to valuation models are appropriately calibrated to market data. For many OTC derivative contracts, the valuation models do not involve material subjectivity as the methodologies do not entail significant judgment and the inputs to valuation models do not involve a high degree of subjectivity as the valuation model inputs are readily observable or can be derived from actively quoted markets. OTC derivative contracts are primarily categorized within Level 2 of the fair value hierarchy given the observability and significance of the inputs to the valuation models. Where significant inputs to the valuation are unobservable, derivative instruments are categorized within Level 3 of the fair value hierarchy.
OTC options include OTC equity, foreign exchange and commodity options measured using various valuation models, such as the Black-Scholes, with key inputs impacting the valuation including the underlying security, foreign exchange spot rate or commodity price, implied volatility, dividend yield, interest rate curve, strike price and maturity date. Discounted cash flow models are utilized to measure certain OTC derivative contracts including the valuations of our interest rate swaps, which incorporate observable inputs related to interest rate curves, valuations of our foreign exchange forwards and swaps, which incorporate observable inputs related to foreign currency spot rates and forward curves and valuations of our commodity swaps, which incorporate observable inputs related to commodity spot prices and forward curves. Credit default swaps include both index and single-name credit default swaps. External prices are available as inputs in measuring index credit default swaps and single-name credit default swaps. For commodity and equity total return swaps, market prices are observable for the underlying asset and used as the basis for measuring the fair value of the derivative contracts. Total return swaps executed on other underlyings are measured based on valuations received from external pricing services.
Physical Commodities
Physical commodities include base and precious metals and are measured using observable inputs including spot prices and published indices. Physical commodities are categorized within Level 2 of the fair value hierarchy. To facilitate the trading in precious metals we undertake leasing of such precious metals. The fees earned or paid for such leases are recorded as Principal transaction revenues on the Consolidated Statements of Earnings.
Investments at Fair Value and Investments in Managed Funds
Investments at fair value and Investments in managed funds include investments in hedge funds, fund of funds, private equity funds, convertible bond funds and commodity funds, which are measured at fair value based on the net asset value of the funds provided by the fund managers and are categorized within Level 2 or Level 3 of the fair value hierarchy. Investments at fair value also include direct equity investments in private companies, which are measured at fair value using valuation techniques involving quoted prices of or market data for comparable companies, similar company ratios and multiples (e.g., price/EBITDA, price/book value), discounted cash flow analyses and transaction prices observed for subsequent financing or capital issuance by the company. Direct equity investments in private companies are categorized within Level 2 or Level 3 of the fair value hierarchy. Additionally, investments at fair value include investments in insurance contracts relating to our defined benefit plan in Germany. Fair value for the insurance contracts is determined using a third party and is categorized within Level 3 of the fair value hierarchy.
The following tables present information about our investments in entities that have the characteristics of an investment company at August 31, 2014 and November 30, 2013 (in thousands):
		August 31, 2014
		Fair Value (1)			Unfunded			Redemption Frequency
					Commitments			(if currently eligible)
Equity Long/Short Hedge Funds (2)		$	39,452		$	—		Monthly, Quarterly
High Yield Hedge Funds (3)			210			—		—
Fund of Funds (4)			334			94		—
Equity Funds (5)			69,232			26,023		—
Convertible Bond Funds (6)			3,590			—		At Will
Total (7)		$	112,818		$	26,117
		November 30, 2013
		Fair Value (1)			Unfunded			Redemption Frequency
					Commitments			(if currently eligible)
Equity Long/Short Hedge Funds (2)		$	20,927		$	—		Monthly, Quarterly
High Yield Hedge Funds (3)			244			—		—
Fund of Funds (4)			494			94		—
Equity Funds (5)			66,495			40,816		—
Convertible Bond Funds (6)			3,473			—		At Will
Total (7)		$	91,633		$	40,910
-1	Where fair value is calculated based on net asset value, fair value has been derived from each of the funds’ capital statements.
-2	This category includes investments in hedge funds that invest, long and short, in equity securities in domestic and international markets in both the public and private sectors. At August 31, 2014 and November 30, 2013, investments representing approximately 99% and 98%, respectively, of the fair value of investments in this category are redeemable with 30—65 days prior written notice, and includes an investment in a private asset management fund managed by us with a fair value of $16.0 million at August 31, 2014.
-3	Includes investments in funds that invest in domestic and international public high yield debt, private high yield investments, senior bank loans, public leveraged equities, distressed debt, and private equity investments. There are no redemption provisions. The underlying assets of the funds are being liquidated and we are unable to estimate when the underlying assets will be fully liquidated.
-4	Includes investments in fund of funds that invest in various private equity funds. At August 31, 2014 and November 30, 2013, approximately 96% and 98%, respectively, of the fair value of investments in this category are managed by us and have no redemption provisions, instead distributions are received through the liquidation of the underlying assets of the fund of funds, which are estimated to be liquidated in approximately two years. For the remaining investments we have requested redemption; however, we are unable to estimate when these funds will be received.
-5	At August 31, 2014 and November 30, 2013, investments representing approximately 99% and 99%, respectively, of the fair value of investments in this category include investments in equity funds that invest in the equity of various U.S. and foreign private companies in the energy, technology, internet service and telecommunication service industries. These investments cannot be redeemed, instead distributions are received through the liquidation of the underlying assets of the funds which are expected to liquidate in one to eight years. The remaining investments are in liquidation and we are unable to estimate when the underlying assets will be fully liquidated. At August 31, 2014 and November 30, 2013, this category includes investments in equity funds managed by us with a fair value of $58.8 million and $54.4 million and unfunded commitments of $24.4 million and $39.2 million, respectively.
-6	This category represents an investment in the Jefferies Umbrella Fund, an open-ended investment company managed by us that invests primarily in convertible bonds. The investment is redeemable with 5 days prior written notice.
-7	Investments at fair value in the Consolidated Statements of Financial Condition at August 31, 2014 and November 30, 2013 include $87.0 million and $66.9 million, respectively, of direct investments which do not have the characteristics of investment companies and therefore not included within this table.
Other Secured Financings
Other secured financings include the notes issued by consolidated VIEs, which are classified as Level 2 or Level 3 within the fair value hierarchy. Fair value is based on recent transaction prices. In addition, at August 31, 2014, Other secured financings includes $12.7 million related to transfers of loans accounted for as secured financings rather than as sales and classified as Level 3 within the fair value hierarchy.
Embedded Conversion Option
The embedded conversion option presented within long-term debt represents the fair value of the conversion option on Leucadia shares within our 3.875% Convertible Senior Debentures, due November 1, 2029 and categorized as Level 3 within the fair value hierarchy. The conversion option was valued using a convertible bond model using as inputs the price of Leucadia’s common stock, the conversion strike price, 252-day historical volatility, a maturity date of November 1, 2017 (the first put date), dividend yield and the risk-free interest rate curve.
Pricing Information
At August 31, 2014 and November 30, 2013, our Financial instruments owned and Financial instruments sold, not yet purchased are measured using different valuation bases as follows:
		August 31, 2014						November 30, 2013
		Financial			Financial			Financial				Financial
		Instruments Owned			Instruments Sold,			Instruments Owned				Instruments Sold,
					Not Yet							Not Yet
					Purchased							Purchased
Exchange closing prices			13	%		18	%		12	%			25	%
Recently observed transaction prices			3	%		3	%		5	%			4	%
External pricing services			70	%		72	%		68	%			66	%
Broker quotes			4	%		3	%		3	%			3	%
Valuation techniques			10	%		4	%		12	%			2	%
			100	%		100	%		100	%			100	%
The following is a summary of changes in fair value of our financial assets and liabilities that have been categorized within Level 3 of the fair value hierarchy for the three months ended August 31, 2014 (in thousands):
		Successor
		Three Months Ended August 31, 2014
		Balance at			Total gains/			Purchases				Sales			Settlements			Issuances			Net			Balance at			Change in
		May 31,			losses																transfers			August 31,			unrealized gains/
		2014			(realized and																into/			2014			(losses) relating
					unrealized)																(out of)						to instruments
					-1																Level 3						still held at
																											August 31,
																											2014 (1)
Assets:
Financial instruments owned:
Corporate equity securities		$	16,402		$	(480	)	$	4,528			$	(529	)	$	—		$	—		$	(12,144	)	$	7,777		$	(286	)
Corporate debt securities			31,648			5,454			21,793				(15,713	)		(34	)		—			(6,264	)		36,884			3,470
Collateralized debt obligations			42,313			(845	)		7,613				(15,204	)		—			—			9,863			43,740			(1,575	)
U.S government and federal agency securities			—			(11	)		2,505				—			—			—			—			2,494			(11	)
Residential mortgage-backed securities			71,962			(2,557	)		3,981				(9,635	)		(325	)		—			17,608			81,034			(302	)
Commercial mortgage-backed securities			24,246			(256	)		641				(7,068	)		—			—			1,764			19,327			(832	)
Other asset-backed securities			45,444			1,272			50,620				(49,411	)		(8,774	)		—			(37,072	)		2,079			(3	)
Loans and other receivables			138,643			(8,074	)		194,387				(96,340	)		(40,617	)		—			26			188,025			(7,967	)
Investments, at fair value			118,071			(4	)		500				(7,232	)		(305	)		—			5,357			116,387			105
Investments in managed funds			56,119			734			1,469				—			—			—			—			58,322			734
Liabilities:
Financial instruments sold, not yet purchased:
Corporate equity securities		$	38		$	—		$	—			$	—		$	—		$	—		$	—		$	38		$	—
Corporate debt securities			2,780			(101	)		(2,566	)			—			—			—			129			242			67
Net derivatives (2)			15,282			(1,632	)		(74	)			74			(70	)		—			—			13,580			70
Loans			31,534			—			(16,307	)			—			—			—			(8,566	)		6,661			—
Other secured financings			20,288			—			—				—			(7,570	)		18,948			—			31,666			—
Embedded conversion option			3,895			(2,463	)		—				—			—			—			—			1,432			2,463
-1	Realized and unrealized gains/losses are reported in Principal transactions in the Consolidated Statements of Earnings.
-2	Net derivatives represent Financial instruments owned – Derivatives and Financial instruments sold, not yet purchased – Derivatives.
Analysis of Level 3 Assets and Liabilities for the Three Months Ended August 31, 2014
During the three months ended August 31, 2014, transfers of assets of $87.8 million from Level 2 to Level 3 of the fair value hierarchy are attributed to:
	•		Non-agency residential mortgage-backed securities of $30.1 million, commercial mortgage-backed securities of $6.8 million and other asset-backed securities of $1.5 million for which no recent trade activity was observed for purposes of determining observable inputs;
	•		Loans and other receivables of $25.1 million and investments at fair value of $5.4 million due to a lower number of contributors comprising vendor quotes to support classification within Level 2;
	•		Collateralized debt obligations of $15.2 million which have little to no transparency related to trade activity;
During the three months ended August 31, 2014, transfers of assets of $108.6 million from Level 3 to Level 2 are attributed to:
	•		Non-agency residential mortgage-backed securities of $12.5 million, commercial mortgage-backed securities of $5.0 million and other asset-backed securities of $38.6 million for which market trades were observed in the period for either identical or similar securities;
	•		Collateralized debt obligations of $5.3 million and loans and other receivables of $25.1 million due to a greater number of contributors for certain vendor quotes supporting classification into Level 2;
	•		Corporate equity securities of $13.9 million due to an increase in observable market transactions.
During the three months ended August 31, 2014, there were transfers of loan liabilities of $8.6 million from Level 3 to Level 2 due to an increase in observable inputs in the valuation.
Net losses on Level 3 assets were $4.8 million and net gains on Level 3 liabilities were $4.2 million for the three months ended August 31, 2014. Net losses on Level 3 assets were primarily due to decreased valuations of certain loans and other receivables, residential and commercial mortgage-backed securities, collateralized debt obligations, and corporate equity securities, partially offset by an increase in valuation of certain corporate debt securities, other asset-backed securities and investments in managed funds. Net gains on Level 3 liabilities were primarily due to decreased valuations of the embedded conversion option and decreased valuations of certain derivative instruments and certain corporate debt securities.
The following is a summary of changes in fair value of our financial assets and liabilities that have been categorized within Level 3 of the fair value hierarchy for the nine months ended August 31, 2014 (in thousands):
		Successor
		Nine Months Ended August 31, 2014
		Balance at			Total			Purchases				Sales			Settlements			Issuances			Net			Balance at			Change in
		November 30,			gains/																transfers			August 31,			unrealized gains/
		2013			losses																into/			2014			(losses) relating
					(realized																(out of)						to instruments
					and																Level 3						still held at
					unrealized)																						August 31,
					-1																						2014 (1)
Assets:
Financial instruments owned:
Corporate equity securities		$	9,884		$	(1,528	)	$	36,661			$	(31,444	)	$	—		$	—		$	(5,796	)	$	7,777		$	(400	)
Corporate debt securities			25,666			10,727			137,164				(128,733	)		—			—			(7,940	)		36,884			10,177
Collateralized debt obligations			37,216			5,198			94,743				(99,661	)		—			—			6,244			43,740			(6,283	)
U.S goevernment and federal agency securities			—			(11	)		2,505				—			—			—			—			2,494			(11	)
Residential mortgage-backed securities			105,492			(6,974	)		44,454				(65,229	)		(812	)		—			4,103			81,034			(3,564	)
Commercial mortgage-backed securities			17,568			(3,120	)		34,959				(32,774	)		(1,315	)		—			4,009			19,327			(3,380	)
Other asset-backed securities			12,611			256			52,495				(52,282	)		(8,804	)		—			(2,197	)		2,079			—
Loans and other receivables			145,890			(9,028	)		247,383				(147,851	)		(61,791	)		—			13,422			188,025			(8,961	)
Investments, at fair value			101,242			27,264			30,660				(40,916	)		(945	)		—			(918	)		116,387			12,775
Investments in managed funds			57,285			(10,515	)		14,875				—			—			—			(3,323	)		58,322			(10,515	)
Liabilities:
Financial instruments sold, not yet purchased:
Corporate equity securities		$	38		$	—		$	—			$	—		$	—		$	—		$	—		$	38		$	—
Corporate debt securities			—			163			(7	)			97			—			—			(11	)		242			(163	)
Net derivatives (2)			6,905			9,959			(124	)			(76	)		248			—			(3,332	)		13,580			(10,519	)
Loans			22,462			—			(15,472	)			3,549			—			—			(3,878	)		6,661			—
Other secured financings			8,711			—			—				—			(16,684	)		39,639			—			31,666			—
Embedded conversion option			9,574			(8,142	)		—				—			—			—			—			1,432			8,142
-1	Realized and unrealized gains/losses are reported in Principal transactions in the Consolidated Statements of Earnings.
-2	Net derivatives represent Financial instruments owned – Derivatives and Financial instruments sold, not yet purchased – Derivatives.
Analysis of Level 3 Assets and Liabilities for the Nine Months Ended August 31, 2014
During the nine months ended August 31, 2014, transfers of assets of $79.4 million from Level 2 to Level 3 of the fair value hierarchy are attributed to:
	•		Non-agency residential mortgage-backed securities of $27.2 million, commercial mortgage-backed securities of $4.6 million and other asset-backed securities of $1.3 million for which no recent trade activity was observed for purposes of determining observable inputs;
	•		Loans and other receivables of $31.4 million due to a lower number of contributors comprising vendor quotes to support classification within Level 2;
	•		Collateralized debt obligations of $7.5 million which have little to no transparency related to trade activity.
	•		Investments at fair value of $6.5 million due to a lack of observable market transactions.
During the nine months ended August 31, 2014, transfers of assets of $71.8 million from Level 3 to Level 2 are attributed to:
	•		Non-agency residential mortgage-backed securities of $23.1 million, commercial mortgage-backed securities of $0.5 million and other asset-backed securities of $3.5 million for which market trades were observed in the period for either identical or similar securities;
	•		Collateralized debt obligations of $1.3 million, loans and other receivables of $18.0 million and investments at fair value of $7.4 million due to a greater number of contributors for certain vendor quotes supporting classification into Level 2;
	•		Corporate equity securities of $6.5 million, corporate debt securities of $8.0 million and investments in managed funds $3.5 million due to an increase in observable market transactions.
There were $3.9 million transfers of loan liabilities from Level 3 to Level 2 and $3.3 million transfers of net derivative liabilities from Level 3 to Level 2 due to an increase in observable inputs in the valuation and an increase in observable inputs used in the valuing of derivative contracts, respectively.
Net gains on Level 3 assets were $12.3 million and net losses on Level 3 liabilities were $2.0 million for the nine months ended August 31, 2014. Net gains on Level 3 assets were primarily due to increased valuations of certain investments at fair value, corporate debt securities and collateralized debt obligations, partially offset by a decrease in valuation of certain residential and commercial mortgage-backed securities, loans and other receivables, corporate equity securities, and investments in managed funds. Net losses on Level 3 liabilities were primarily due to increased valuations of certain derivatives, partially offset by decreased valuations of the embedded conversion option.
The following is a summary of changes in fair value of our financial assets and liabilities that have been categorized within Level 3 of the fair value hierarchy for the three months ended August 31, 2013 (in thousands):
		Successor
		Three Months Ended August 31, 2013 (1)
		Balance at			Total gains/			Purchases				Sales			Settlements			Net			Balance at			Change in
		May 31,			losses (realized													transfers			August 31,			unrealized gains/
		2013			and unrealized)													into/			2013			(losses) relating
					-2													(out of)						to instruments
																		Level 3						still held at
																								August 31,
																								2013 (2)
Assets:
Financial instruments owned:
Corporate equity securities		$	19,577		$	(788	)	$	—			$	(930	)	$	—		$	(1,780	)	$	16,079		$	(786	)
Corporate debt securities			18,615			(4,285	)		68				(571	)		—			6,806			20,633			(4,342	)
Collateralized debt obligations			40,084			(1,903	)		8,222				(4,236	)		—			(1,335	)		40,832			(2,388	)
Residential mortgage-backed securities			143,766			(1,876	)		33,831				(50,938	)		(2,306	)		9,706			132,183			(3,898	)
Commercial mortgage-backed securities			16,068			2,033			130				(310	)		(3,703	)		205			14,423			(1,106	)
Other asset-backed securities			1,484			2,170			7,576				(3,279	)		—			659			8,610			2,142
Loans and other receivables			117,496			(198	)		52,246				(12,139	)		(25,395	)		(1,558	)		130,452			609
Investments, at fair value			81,364			1,848			—				(101	)		(710	)		(3,949	)		78,452			2,002
Investments in managed funds			55,141			4,034			6,598				—			(9,876	)		—			55,897			4,034
Liabilities:
Financial instruments sold, not yet purchased:
Corporate equity securities		$	38		$	—		$	—			$	—		$	—		$	—		$	38		$	—
Net derivatives (3)			10,799			3,899			—				—			(60	)		—			14,638			(3,899	)
Loans			15,212			—			(14,952	)			716			—			—			976			—
Other secured financings			2,294			731			—				—			—			—			3,025			(731	)
Embedded conversion option			10,902			(3,566	)		—				—			—			—			7,336			3,566
-1	There were no issuances during the three months ended August 31, 2013.
-2	Realized and unrealized gains/losses are reported in Principal transactions in the Consolidated Statements of Earnings.
-3	Net derivatives represent Financial instruments owned – Derivatives and Financial instruments sold, not yet purchased – Derivatives.
Analysis of Level 3 Assets and Liabilities for the Three Months Ended August 31, 2013
During the three months ended August 31, 2013, transfers of assets of $91.4 million from Level 2 to Level 3 of the fair value hierarchy are attributed to:
•		Non-agency residential mortgage-backed securities of $50.3 million and commercial mortgage-backed securities of $2.4 million for which no recent trade activity was observed for purposes of determining observable inputs;
•		Corporate equity securities of $5.6 million and corporate debt securities of $8.3 million due to lack of observable market transactions;
•		Collateralized debt obligations of $22.3 million which have little to no transparency related to trade activity;
During the three months ended August 31, 2013, transfers of assets of $82.7 million from Level 3 to Level 2 are attributed to:
•		Non-agency residential mortgage-backed securities of $40.6 million and commercial mortgage-backed securities of $2.2 million for which market trades were observed in the period for either identical or similar securities;
•		Collateralized debt obligations of $23.6 million and loans and other receivables of $1.6 million due to a greater number of contributors for certain vendor quotes supporting classification into Level 2;
•		Corporate equity securities of $7.4 million and corporate debt securities of $1.5 million due to an increase in observable market transactions.
During the three months ended August 31, 2013, there were no transfers of liabilities from Level 2 to Level 3 and from Level 3 to Level 2.
Net gains on Level 3 assets were $1.0 million and net losses on Level 3 liabilities were $1.1 million for the three months ended August 31, 2013. Net gains on Level 3 assets were primarily due to increased valuations of certain commercial mortgage-backed securities, other asset-backed securities, investments at fair value and investments in managed funds, partially offset by a decrease in valuation of certain corporate equity securities, corporate debt securities, collateralized debt obligations, residential mortgage-backed securities and loans and other receivables. Net losses on Level 3 liabilities were primarily due to increased valuations of certain derivative instruments, partially offset by decreased valuations of the embedded conversion option.
The following is a summary of changes in fair value of our financial assets and liabilities that have been categorized within Level 3 of the fair value hierarchy for the six months ended August 31, 2013 (in thousands):
		Successor
		Six Months Ended August 31, 2013 (1)
		Balance at			Total gains/			Purchases				Sales			Settlements			Net			Balance at			Change in
		February 28,			losses (realized													transfers			August 31,			unrealized gains/
		2013			and unrealized)													into/			2013			(losses) relating
					-2													(out of)						to instruments
																		Level 3						still held at
																								August 31,
																								2013 (2)
Assets:
Financial instruments owned:
Corporate equity securities		$	13,234		$	1,053		$	213			$	(753	)	$	266		$	2,066		$	16,079		$	1,243
Corporate debt securities			31,820			(17,415	)		708				(2,556	)		—			8,076			20,633			(6,933	)
Collateralized debt obligations			24,736			(2,008	)		43,152				(27,676	)		—			2,628			40,832			(3,830	)
Residential mortgage-backed securities			169,426			5,594			79,531				(105,671	)		(4,851	)		(11,846	)		132,183			586
Commercial mortgage-backed securities			17,794			(735	)		1,533				(3,054	)		(5,281	)		4,166			14,423			(5,007	)
Other asset-backed securities			1,292			2,168			7,618				(3,127	)		—			659			8,610			2,077
Loans and other receivables			170,986			(5,103	)		206,672				(26,630	)		(213,662	)		(1,811	)		130,452			(8,063	)
Investments, at fair value			75,067			653			5,000				(102	)		(3,204	)		1,038			78,452			668
Investments in managed funds			59,976			3,108			9,130				—			(16,439	)		122			55,897			3,108
Liabilities:
Financial instruments sold, not yet purchased:
Corporate equity securities		$	38		$	—		$	—			$	—		$	—		$	—		$	38		$	—
Residential mortgage-backed securities			1,542			(1,542	)		—				—			—			—			—			—
Net derivatives (3)			11,185			3,453			—				—			—			—			14,638			(3,453	)
Loans			7,398			—			(20,221	)			13,799			—			—			976			—
Other secured financings			—			731			—				—			—			2,294			3,025			(731	)
Embedded conversion option (4)			16,488			(9,152	)		—				—			—			—			7,336			9,152
-1	There were no issuances during the six months ended August 31, 2013.
-2	Realized and unrealized gains/losses are reported in Principal transactions in the Consolidated Statements of Earnings.
-3	Net derivatives represent Financial instruments owned – Derivatives and Financial instruments sold, not yet purchased – Derivatives.
-4	The embedded conversion option of $16.5 million is at March 1, 2013, upon completion of the Leucadia Transaction (see Note 13).
Analysis of Level 3 Assets and Liabilities for the Six Months Ended August 31, 2013
During the six months ended August 31, 2013, transfers of assets of $53.6 million from Level 2 to Level 3 of the fair value hierarchy are attributed to:
•		Non-agency residential mortgage-backed securities of $17.9 million and commercial mortgage-backed securities of $5.3 million for which no recent trade activity was observed for purposes of determining observable inputs;
•		Loans and other receivables of $0.4 million due to a lower number of contributors comprising vendor quotes to support classification within Level 2.
•		Corporate equity securities of $7.0 million and corporate debt securities of $8.5 million due to lack of observable market transactions;
•		Collateralized debt obligations of $12.1 million which have little to no transparency related to trade activity;
During the six months ended August 31, 2013, transfers of assets of $48.5 million from Level 3 to Level 2 are attributed to:
•		Non-agency residential mortgage-backed securities of $29.7 million and commercial mortgage-backed securities of $1.2 million for which market trades were observed in the period for either identical or similar securities;
•		Collateralized debt obligations of $9.5 million and loans and other receivables of $2.2 million due to a greater number of contributors for certain vendor quotes supporting classification into Level 2;
•		Corporate equity securities of $4.9 million and corporate debt securities of $0.4 million due to an increase in observable market transactions.
During the six months ended August 31, 2013, there were no transfers of liabilities from Level 2 to Level 3 and no transfers of liabilities from Level 3 to Level 2.
Net losses on Level 3 assets were $12.7 million and net gains on Level 3 liabilities were $6.5 million for the six months ended August 31, 2013, respectively. Net losses on Level 3 assets were primarily due to decreased valuations of certain corporate debt securities, collateralized debt obligations, commercial mortgage-backed securities and loans and other receivables, partially offset by an increase in valuation of certain corporate equity securities, residential mortgage-backed securities, other asset-backed securities, investments at fair value and investments in managed funds. Net gains on Level 3 liabilities were primarily due decreased valuations of the embedded conversion option, partially offset by increased valuations of certain derivative instruments.
The following is a summary of changes in fair value of our financial assets and liabilities that have been categorized within Level 3 of the fair value hierarchy for the three months ended February 28, 2013 (in thousands):
		Predecessor
		Three Months Ended February 28, 2013 (1)
		Balance at			Total gains/			Purchases				Sales			Settlements			Net			Balance at			Change in
		November 30,			losses (realized													transfers			February			unrealized gains/
		2012			and unrealized)													into/			28, 2013			(losses) relating
					-2													(out of)						to instruments
																		Level 3						still held at
																								February 28,
																								2013 (2)
Assets:
Financial instruments owned:
Corporate equity securities		$	16,815		$	200		$	707			$	109		$	—		$	(4,597	)	$	13,234		$	172
Corporate debt securities			3,631			7,836			11,510				(1,918	)		—			10,761			31,820			7,833
Collateralized debt obligations			31,255			3,584			4,406				(17,374	)		—			2,865			24,736			(1,165	)
Residential mortgage-backed securities			156,069			11,906			132,773				(130,143	)		(6,057	)		4,878			169,426			4,511
Commercial mortgage-backed securities			30,202			(995	)		2,280				(2,866	)		(1,188	)		(9,639	)		17,794			(2,059	)
Other asset-backed securities			1,114			90			1,627				(1,342	)		(19	)		(178	)		1,292			39
Loans and other receivables			180,393			(8,682	)		105,650				(29,828	)		(61,407	)		(15,140	)		170,986			(12,374	)
Investments, at fair value			83,897			961			5,952				(4,923	)		(9,721	)		(1,099	)		75,067			1,171
Investments in managed funds			57,763			(363	)		11,068				—			(8,492	)		—			59,976			(363	)
Liabilities:
Financial instruments sold, not yet purchased:
Corporate equity securities		$	38		$	—		$	—			$	—		$	—		$	—		$	38		$	—
Residential mortgage-backed securities			—			25			(73,846	)			75,363			—			—			1,542			(19	)
Net derivatives (3)			9,188			2,648			—				—			—			(651	)		11,185			(2,648	)
Loans			1,711			—			(1,711	)			7,398			—			—			7,398			—
-1	There were no issuances during the three months ended February 28, 2013.
-2	Realized and unrealized gains/losses are reported in Principal transactions in the Consolidated Statements of Earnings.
-3	Net derivatives represent Financial instruments owned – Derivatives and Financial instruments sold, not yet purchased – Derivatives.
Analysis of Level 3 Assets and Liabilities for the Three Months Ended February 28, 2013
During the three months ended February 28, 2013, transfers of assets of $100.5 million from Level 2 to Level 3 of the fair value hierarchy are attributed to:
	•		Non-agency residential mortgage-backed securities of $78.4 million and commercial mortgage-backed securities of $1.3 million for which no recent trade activity was observed for purposes of determining observable inputs;
	•		Corporate debt securities of $10.8 million and corporate equity securities of $0.1 million due to lack of observable market transactions;
	•		Collateralized debt obligations of $5.3 million which have little to no transparency in trade activity;
	•		Loans and other receivables of $4.8 million due to a lower number of contributors comprising vendor quotes to support classification within Level 2.
During the three months ended February 28, 2013, transfers of assets of $112.7 million from Level 3 to Level 2 are attributed to:
	•		Non-agency residential mortgage-backed securities of $73.5 million, commercial mortgage-backed securities of $10.9 million and $0.2 million of other asset-backed securities for which market trades were observed in the period for either identical or similar securities;
	•		Loans and other receivables of $19.9 million and collateralized debt obligations of $2.4 million due to a greater number of contributors for certain vendor quotes supporting classification into Level 2;
	•		Corporate equity securities of $4.7 million due to an increase in observable market transactions.
During the three months ended February 28, 2013, there were no transfers of liabilities from Level 2 to Level 3 and there were $0.7 million transfers of net derivative liabilities from Level 3 to Level 2 due to an increase in observable significant inputs used in valuing the derivative contracts.
Net gains on Level 3 assets were $14.5 million and net losses on Level 3 liabilities were $2.7 million for the three months ended February 28, 2013. Net gains on Level 3 assets were primarily due to increased valuations of certain residential mortgage-backed securities, corporate debt securities, collateralized debt obligations and investments at fair value partially offset by a decrease in valuation of certain loans and other receivables, commercial mortgage backed securities and investments in managed funds. Net losses on Level 3 liabilities were primarily due to increased valuations of certain derivative instruments.
Quantitative Information about Significant Unobservable Inputs used in Level 3 Fair Value Measurements at August 31, 2014 and November 30, 2013
The tables below present information on the valuation techniques, significant unobservable inputs and their ranges for our financial assets and liabilities, subject to threshold levels related to the market value of the positions held, measured at fair value on a recurring basis with a significant Level 3 balance. The range of unobservable inputs could differ significantly across different firms given the range of products across different firms in the financial services sector. The inputs are not representative of the inputs that could have been used in the valuation of any one financial instrument (i.e., the input used for valuing one financial instrument within a particular class of financial instruments may not be appropriate for valuing other financial instruments within that given class). Additionally, the ranges of inputs presented below should not be construed to represent uncertainty regarding the fair values of our financial instruments; rather the range of inputs is reflective of the differences in the underlying characteristics of the financial instruments in each category.
For certain categories, we have provided a weighted average of the inputs allocated based on the fair values of the financial instruments comprising the category. We do not believe that the range or weighted average of the inputs is indicative of the reasonableness of uncertainty of our Level 3 fair values. The range and weighted average are driven by the individual financial instruments within each category and their relative distribution in the population. The disclosed inputs when compared with the inputs as disclosed in other quarters should not be expected to necessarily be indicative of changes in our estimates of unobservable inputs for a particular financial instrument as the population of financial instruments comprising the category will vary from period to period based on purchases and sales of financial instruments during the period as well as transfers into and out of Level 3 each period.
August 31, 2014
Financial Instruments Owned		Fair Value			Valuation Technique		Significant Unobservable Input(s)	Input / Range		Weighted
		(in thousands)								Average
Corporate equity securities		$	7,777
Non-exchange traded securities					Market approach		EBITDA (a) multiple	3.05			—
							Transaction Level	2.95			—
Corporate debt securities		$	34,965		Market approach		Yield	3.7%-4.4%			4.2	%
					Convertible bond model		Discount rate/yield	31.90%			—
					Discounted cash flows		Constant prepayment rate	20.00%			—
							Constant default rate	2.00%			—
							Loss severity	25.00%			—
							Yield	16.00%			—
Collateralized debt obligations		$	41,690		Discounted cash flows		Constant prepayment rate	10% - 20%			15.29	%
							Constant default rate	2%			—
							Loss severity	25% - 95%			55.7	%
							Yield	0% - 47.3%			7.83	%
U.S. government and federal agency securities		$	2,494		Market approach		Transaction Level	$100			—
Residential mortgage-backed securities		$	81,034		Discounted cash flows		Constant prepayment rate	3% - 50%			11.9	%
							Constant default rate	1% - 100%			14.5	%
							Loss severity	20% - 80%			48.4	%
							Yield	1.2% - 12.6%			6	%
Commercial mortgage-backed securities		$	19,327		Discounted cash flows		Yield	7.6% - 15%			11.6	%
							Cumulative loss rate	4.6% - 74%			16.7	%
Other asset-backed securities		$	2,079		Discounted cash flows		Constant prepayment rate	0%			—
							Constant default rate	0%			—
							Loss severity	0%			—
							Yield	7%			—
Loans and other receivables		$	179,189		Comparable pricing		Comparable bond or loan price	$92.5 - $100		$	99.63
					Market approach		Yield	2.6% - 4.6%			3.9	%
							EBITDA (a) multiple	3.05-7			6.64
					Scenario analysis		Estimated recovery percentage	10.33% - 81.3%			70.9	%
Investments at fair value
Private equity securities		$	29,135		Comparable pricing		Comparable share price	$26.80			—
					Market approach		Transaction Level	$50.36			—
Liabilities		Fair Value			Valuation Technique		Significant Unobservable Input(s)	Input / Range		Weighted
		(in thousands)								Average
Financial Instruments Sold, Not Yet Purchased:
Derivatives
Unfunded commitment		$	14,784		Comparable pricing		Comparable loan price	$93.5 - $99.625		$	94.64
					Market Approach		Yield	4.58%			—
Embedded conversion option		$	1,432		Option valuation model		Historical volatility	18.38%			—
							Dividend yield	1.00%			—
(a)	Earnings before interest, taxes, depreciation and amortization (“EBITDA”).
November 30, 2013
Financial Instruments Owned		Fair Value			Valuation Technique		Significant Unobservable Input(s)	Input / Range		Weighted
		(in thousands)								Average
Corporate equity securities		$	8,034
Non-exchange traded securities					Market approach		EBITDA multiple	4.0 to 5.5			4.53
Warrants					Option model		Volatility	36%			—
Corporate debt securities		$	17,699		Scenario analysis		Estimated recovery percentage	24%			—
					Comparable pricing		Comparable bond or loan price	$69.10 to		$	69.91
								$70.50
					Market approach		Yield	13%			—
Collateralized debt obligations		$	34,316		Discounted cash flows		Constant prepayment rate	0% to 20%			13	%
							Constant default rate	2% to 3%			2	%
							Loss severity	30% to 85%			38	%
							Yield	3% to 91%			28	%
Residential mortgage-backed securities		$	105,492		Discounted cash flows		Constant prepayment rate	2% to 50%			11	%
							Constant default rate	1% to 100%			17	%
							Loss severity	30% to 90%			48	%
							Yield	0% to 20%			7	%
Commercial mortgage-backed securities		$	17,568		Discounted cash flows		Yield	12% to 20%			14	%
							Cumulative loss rate	5% to 28.2%			11	%
Other asset-backed securities		$	12,611		Discounted cash flows		Constant prepayment rate	4% to 30%			17	%
							Constant default rate	2% to 11%			7	%
							Loss severity	40% to 92%			64	%
							Yield	3% to 29%			18	%
Loans and other receivables		$	101,931		Comparable pricing		Comparable bond or loan price	$91 to $101		$	98.9
					Market approach		Yield	8.75% to 13.5%			10	%
							EBITDA (a) multiple	6.9			—
					Scenario analysis		Estimated recovery percentage	16.9% to 92%			74	%
Derivatives
Loan commitments		$	1,493		Comparable pricing		Comparable bond or loan price	$100.88			—
Investments at fair value
Private equity securities		$	30,203		Comparable pricing		Comparable share price	$414			—
					Market approach		Discount rate	15% to 30%			23	%
Liabilities		Fair Value			Valuation Technique		Significant Unobservable Input(s)	Input / Range		Weighted
		(in thousands)								Average
Financial Instruments Sold, Not Yet Purchased:
Derivatives
Equity options		$	8,398		Option model		Volatility	36.25% to 41%			39	%
Loans		$	8,106		Comparable pricing		Comparable bond or loan price	$101.88			—
Embedded conversion option		$	9,574		Option valuation model		Historical volatility	22.55%			—
							Dividend yield	0.87%			—
The fair values of certain Level 3 assets and liabilities that were determined based on third-party pricing information, unadjusted past transaction prices, reported net asset value or a percentage of the reported enterprise fair value are excluded from the above tables. At August 31, 2014 and November 30, 2013, asset exclusions consisted of $101.3 million and $127.7 million, respectively, primarily comprised of investments in private equity securities, investments in reinsurance contracts, derivatives and certain corporate loans. At August 31, 2014 and November 30, 2013, liability exclusions consisted of $6.7 million and $14.4 million, respectively of corporate loan commitments.
Sensitivity of Fair Values to Changes in Significant Unobservable Inputs
For recurring fair value measurements categorized within Level 3 of the fair value hierarchy, the sensitivity of the fair value measurement to changes in significant unobservable inputs and interrelationships between those unobservable inputs (if any) are described below:
	•		Private equity securities, corporate debt securities, other asset-backed securities, loans and other receivables and loan commitments using comparable pricing valuation techniques. A significant increase (decrease) in the comparable share, bond or loan price in isolation would result in a significant higher (lower) fair value measurement.
	•		Non-exchange traded securities and loans and other receivables using a market approach valuation technique. A significant increase (decrease) in the EBITDA or other multiples in isolation would result in a significantly higher (lower) fair value measurement. A significant increase (decrease) in the yield of a corporate debt security, loan and other receivable would result in a significantly lower (higher) fair value measurement. A significant increase (decrease) in the discount rate of a private equity security would result in a significantly lower (higher) fair value measurement.
	•		Corporate debt securities and loans and other receivables using scenario analysis. A significant increase (decrease) in the possible recovery rates of the cash flow outcomes underlying the investment would result in a significantly higher (lower) fair value measurement for the financial instrument.
	•		Collateralized debt obligations, residential and commercial mortgage-backed securities and other asset-backed securities using a discounted cash flow valuation technique. A significant increase (decrease) in isolation in the constant default rate, and loss severities or cumulative loss rate would result in a significantly lower (higher) fair value measurement. The impact of changes in the constant prepayment rate would have differing impacts depending on the capital structure of the security. A significant increase (decrease) in the loan or bond yield would result in a significant lower (higher) fair value measurement.
	•		Derivative equity options and equity warrants using an option model. A significant increase (decrease) in volatility would result in a significant higher (lower) fair value measurement.
	•		Private equity securities using a net asset value technique. A significant increase (decrease) in the discount applied to net asset value would result in a significant (lower) higher fair value measurement.
Fair Value Option Election
We have elected the fair value option for all loans and loan commitments made by our capital markets businesses. These loans and loan commitments include loans entered into by our investment banking division in connection with client bridge financing and loan syndications, loans purchased by our leveraged credit trading desk as part of its bank loan trading activities and mortgage loan commitments and fundings in connection with mortgage- and other asset-backed securitization activities. Loans and loan commitments originated or purchased by our leveraged credit and mortgage-backed businesses are managed on a fair value basis. Loans are included in Financial instruments owned and loan commitments are included in Financial instruments owned – Derivatives and Financial instruments sold, not yet purchased – Derivatives on the Consolidated Statements of Financial Condition. The fair value option election is not applied to loans made to affiliate entities as such loans are entered into as part of ongoing, strategic business ventures. Loans to affiliate entities are included within Loans to and investments in related parties on the Consolidated Statements of Financial Condition and are accounted for on an amortized cost basis. We have elected the fair value option for our investment in Knight Capital Group, Inc., which is included in Financial Instruments owned – Corporate equity securities on the Consolidated Statement of Financial Condition. See Note 10, Investments for further details regarding our investment in Knight Capital Group, Inc. We have also elected the fair value option for certain financial instruments held by subsidiaries as the investments are risk managed by us on a fair value basis. The fair value option has also been elected for certain secured financings that arise in connection with our securitization activities and other structured financings. Other secured financings, Receivables – Brokers, dealers and clearing organizations, Receivables – Customers, Receivables – Fees, interest and other, Payables – Brokers, dealers and clearing organizations and Payables – Customers, are not accounted for at fair value; however, the recorded amounts approximate fair value due to their liquid or short-term nature.
The following is a summary of gains (losses) due to changes in instrument specific credit risk on loans and other receivables and loan commitments measured at fair value under the fair value option (in thousands):
		Successor																Predecessor
		Three Months Ended			Nine Months Ended			Three Months Ended				Six Months Ended						Three Months Ended
		August 31, 2014			August 31, 2014			August 31, 2013				August 31, 2013						February 28, 2013
Financial Instruments Owned:
Loans and other receivables		$	(15,002	)	$	(12,841	)	$	1,097			$	2,284					$	3,924
Financial Instruments Sold:
Loans		$	103		$	(751	)	$	—			$	—					$	—
Loan commitments			1,338			(10,299	)		4,440				(2,059	)					(2,746	)
The following is a summary of the amount by which contractual principal exceeds fair value for loans and other receivables measured at fair value under the fair value option (in thousands):
		August 31, 2014			November 30, 2013
Financial Instruments Owned:
Loans and other receivables (1)		$	333,925		$	264,896
Loans and other receivables greater than 90 days past due (1)			4,443			—
Loans and other receivables on nonaccrual status (1) (2)			(42,085	)		—
-1	Interest income is recognized separately from other changes in fair value and is included within Interest revenues on the Consolidated Statements of Earnings.
-2	Amount includes all loans and other receivables greater than 90 or more days past due.
The aggregate fair value of loans and other receivables that were 90 or more days past due was $1.2 million and $-0- at August 31, 2014 and November 30, 2013, respectively.
The aggregate fair value of loans and other receivables on nonaccrual status, which includes all loans and other receivables greater than 90 or more days past due, was $305.6 million at August 31, 2014. There were no loan receivables on nonaccrual status at November 30, 2013.

Derivative_Financial_Instrumen

Derivative Financial Instruments	9 Months Ended
	Aug. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Financial Instruments	'
	Note 6. Derivative Financial Instruments
	Off-Balance Sheet Risk
	We have contractual commitments arising in the ordinary course of business for securities loaned or purchased under agreements to resell, repurchase agreements, future purchases and sales of foreign currencies, securities transactions on a when-issued basis and underwriting. Each of these financial instruments and activities contains varying degrees of off-balance sheet risk whereby the fair values of the securities underlying the financial instruments may be in excess of, or less than, the contract amount. The settlement of these transactions is not expected to have a material effect upon our consolidated financial statements.
	Our derivative activities are recorded at fair value in the Consolidated Statements of Financial Condition in Financial instruments owned – derivatives and Financial instruments sold, not yet purchased – derivatives net of cash paid or received under credit support agreements and on a net counterparty basis when a legally enforceable right to offset exists under a master netting agreement. Net realized and unrealized gains and losses are recognized in Principal transactions in the Consolidated Statements of Earnings on a trade date basis and as a component of cash flows from operating activities in the Consolidated Statements of Cash Flows. Acting in a trading capacity, we may enter into derivative transactions to satisfy the needs of our clients and to manage our own exposure to market and credit risks resulting from our trading activities. (See Note 5, Fair Value Disclosures and Note 19, Commitments, Contingencies and Guarantees for additional disclosures about derivative instruments.)
	Derivatives are subject to various risks similar to other financial instruments, including market, credit and operational risk. The risks of derivatives should not be viewed in isolation, but rather should be considered on an aggregate basis along with our other trading-related activities. We manage the risks associated with derivatives on an aggregate basis along with the risks associated with proprietary trading as part of our firm wide risk management policies.
	In connection with our derivative activities, we may enter into International Swaps and Derivative Association, Inc. (“ISDA”) master netting agreements or similar agreements with counterparties. A master agreement creates a single contract under which all transactions between two counterparties are executed allowing for trade aggregation and a single net payment obligation. Master agreements provide protection in bankruptcy in certain circumstances and, where legally enforceable, enable receivables and payables with the same counterparty to be settled or otherwise eliminated by applying amounts due against all or a portion of an amount due from the counterparty or a third party. In addition, we enter into customized bilateral trading agreements and other customer agreements that provide for the netting of receivables and payables with a given counterparty as a single net obligation.
	Under our ISDA master netting agreements, we typically also execute credit support annexes, which provide for collateral, either in the form of cash or securities, to be posted by or paid to a counterparty based on the fair value of the derivative receivable or payable based on the rates and parameters established in the credit support annex. In the event of the counterparty’s default, provisions of the master agreement permit acceleration and termination of all outstanding transactions covered by the agreement such that a single amount is owed by, or to, the non-defaulting party. In addition, any collateral posted can be applied to the net obligations, with any excess returned; and the collateralized party has a right to liquidate the collateral. Any residual claim after netting is treated along with other unsecured claims in bankruptcy court.
	The conditions supporting the legal right of offset may vary from one legal jurisdiction to another and the enforceability of master netting agreements and bankruptcy laws in certain countries or in certain industries is not free from doubt. The right of offset is dependent both on contract law under the governing arrangement and consistency with the bankruptcy laws of the jurisdiction where the counterparty is located. Industry legal opinions with respect to the enforceability of certain standard provisions in respective jurisdictions are relied upon as a part of managing credit risk. In cases where we have not determined an agreement to be enforceable, the related amounts are not offset. Master netting agreements are a critical component of our risk management processes as part of reducing counterparty credit risk and managing liquidity risk.
	We are also a party to clearing agreements with various central clearing parties. Under these arrangements, the central clearing counterparty facilitates settlement between counterparties based on the net payable owed or receivable due and, with respect to daily settlement, cash is generally only required to be deposited to the extent of the net amount. In the event of default, a net termination amount is determined based on the market values of all outstanding positions and the clearing organization or clearing member provides for the liquidation and settlement of the net termination amount among all counterparties to the open derivative contracts.
	The following tables present the fair value and related number of derivative contracts at August 31, 2014 and November 30, 2013 categorized by type of derivative contract and the platform on which these derivatives are transacted. The fair value of assets/liabilities represents our receivable/payable for derivative financial instruments, gross of counterparty netting and cash collateral received and pledged. See Note 7, Collateralized Transactions for information related to offsetting of certain secured financing transactions. The following tables also provide information regarding 1) the extent to which, under enforceable master netting arrangements, such balances are presented net in
	the Consolidated Statements of Financial Condition as appropriate under GAAP and 2) the extent to which other rights of setoff associated with these arrangements exist and could have an effect on our financial position (in thousands, except contract amounts).
			August 31, 2014 (1)
			Assets						Liabilities
			Fair Value			Number of			Fair Value			Number of
						Contracts						Contracts
	Interest rate contracts
	Exchange-traded		$	4,040			55,660		$	3,335			80,615
	Cleared OTC			1,001,657			2,268			1,025,998			1,949
	Bilateral OTC			823,612			1,723			794,541			710
	Foreign exchange contracts
	Exchange-traded			3			16,278			65			23,221
	Bilateral OTC			732,662			12,058			655,255			12,188
	Equity contracts
	Exchange-traded			659,267			1,887,129			606,331			1,886,569
	Bilateral OTC			49,638			2,716			72,821			280
	Commodity contracts
	Exchange-traded			56,279			1,118,702			49,926			1,123,739
	Bilateral OTC			123,678			3,422			119,784			3,733
	Credit contracts
	Cleared OTC			55,293			51			58,196			52
	Bilateral OTC			1,365			15			20,888			29
	Total gross derivative assets/ liabilities:
	Exchange-traded			719,589						659,657
	Cleared OTC			1,056,950						1,084,194
	Bilateral OTC			1,730,955						1,663,289
	Amounts offset in the Consolidated
	Statements of Financial Condition (2):
	Exchange-traded			(655,081	)					(655,081	)
	Cleared OTC			(1,040,774	)					(1,061,414	)
	Bilateral OTC			(1,452,964	)					(1,423,640	)
	Net amounts per Consolidated		$	358,675					$	267,005
	Statements of Financial Condition (3)
	-1	Exchange traded derivatives include derivatives executed on an organized exchange. Cleared OTC derivatives include derivatives executed bilaterally and subsequently novated to and cleared through central clearing counterparties. Bilateral OTC derivatives include derivatives executed and settled bilaterally without the use of an organized exchange or central clearing counterparty.
	-2	Amounts netted include both netting by counterparty and for cash collateral paid or received.
	-3	We have not received or pledged additional collateral under master netting agreements and/or other credit support agreements that is eligible to be offset beyond what has been offset in the Consolidated Statements of Financial Condition.
			November 30, 2013 (1)
			Assets						Liabilities
			Fair Value			Number of			Fair Value			Number of
						Contracts						Contracts
	Interest rate contracts
	Exchange-traded		$	8,696			57,344		$	3,846			68,268
	Cleared OTC			432,667			5,402			396,422			7,730
	Bilateral OTC			724,613			1,221			730,897			1,340
	Foreign exchange contracts
	Exchange-traded			33			111,229			40			104,205
	Bilateral OTC			653,739			7,478			693,618			8,212
	Equity contracts
	Exchange-traded			495,069			1,742,195			465,110			1,800,467
	Bilateral OTC			6,715			148			9,875			136
	Commodity contracts
	Exchange-traded			27,185			785,718			33,661			780,358
	Bilateral OTC			114,095			11,811			139,458			8,359
	Credit contracts
Cleared OTC			49,531			49			51,632			46
Bilateral OTC			2,339			16			8,131			19
Total gross derivative assets/ liabilities:
Exchange-traded			530,983						502,657
Cleared OTC			482,198						448,054
Bilateral OTC			1,501,501						1,581,979
Amounts offset in the Consolidated
Statements of Financial Condition (2):
Exchange-traded			(489,375	)					(489,375	)
Cleared OTC			(446,520	)					(445,106	)
Bilateral OTC			(1,317,694	)					(1,418,130	)
Net amounts per Consolidated		$	261,093					$	180,079
Statements of Financial Condition (3)
-1	Exchange traded derivatives include derivatives executed on an organized exchange. Cleared OTC derivatives include derivatives executed bilaterally and subsequently novated to and cleared through central clearing counterparties. Bilateral OTC derivatives include derivatives executed and settled bilaterally without the use of an organized exchange or central clearing counterparty.
-2	Amounts netted include both netting by counterparty and for cash collateral paid or received.
-3	We have not received or pledged additional collateral under master netting agreements and/or other credit support agreements that is eligible to be offset beyond what has been offset in the Consolidated Statements of Financial Condition.
The following table presents unrealized and realized gains (losses) on derivative contracts for the three and nine months ended August 31, 2014, the three and six months ended August 31, 2013 and the three months ended February 28, 2013 (in thousands):
		Successor															Predecessor
		Three Months Ended			Nine Months Ended			Three Months Ended			Six Months Ended						Three Months Ended
Gains (Losses)		August 31, 2014			August 31, 2014			August 31, 2013			August 31, 2013						February 28, 2013
Interest rate contracts		$	(3,803	)	$	(46,376	)	$	130,178		$	177,796					$	45,875
Foreign exchange contracts			6,697			8,294			(3,930	)		(25	)					12,228
Equity contracts			(49,422	)		(220,774	)		25,509			37,588						(20,938	)
Commodity contracts			(4,991	)		32,989			15,080			36,593						19,585
Credit contracts			(1,330	)		(17,318	)		(904	)		(13,425	)					(3,886	)
Total		$	(52,849	)	$	(243,185	)	$	165,933		$	238,527					$	52,864
OTC Derivatives. The following tables set forth by remaining contract maturity the fair value of OTC derivative assets and liabilities at August 31, 2014 (in thousands):
		OTC Derivative Assets (1) (2) (3)
		0 – 12 Months			1 – 5 Years			Greater Than			Cross-Maturity			Total
								5 Years			Netting (4)
Commodity swaps, options and forwards		$	62,219		$	7,459		$	—		$	(2,344	)	$	67,334
Equity swaps and options			1,980			36,355			5,911			—			44,246
Total return swaps			2,816			2			—			—			2,818
Foreign currency forwards, swaps and options			179,297			31,983			3,255			(16,960	)		197,575
Interest rate swaps, options and forwards			49,095			107,025			152,536			(62,126	)		246,530
Total		$	295,407		$	182,824		$	161,702		$	(81,430	)		558,503
Cross product counterparty netting															(8,871	)
Total OTC derivative assets included in Financial instruments owned														$	549,632
-1	At August 31, 2014, we held exchange traded derivative assets and other credit agreements with a fair value of $69.0 million, which are not included in this table.
-2	OTC derivative assets in the table above are gross of collateral received. OTC derivative assets are recorded net of collateral received on the Consolidated Statements of Financial Condition. At August 31, 2014, cash collateral received was $260.0 million.
-3	Derivative fair values include counterparty netting within product category.
-4	Amounts represent the netting of receivable balances with payable balances for the same counterparty within product category across maturity categories.
		OTC Derivative Liabilities (1) (2) (3)
		0 – 12 Months			1 – 5 Years			Greater Than			Cross-Maturity			Total
								5 Years			Netting (4)
Commodity swaps, options and forwards		$	58,743		$	7,042		$	—		$	(2,344	)	$	63,441
Credit default swaps			62			7,892			747			—			8,701
Equity swaps and options			—			9,977			58,712			—			68,689
Total return swaps			1,704			—			—			—			1,704
Foreign currency forwards, swaps and options			106,582			27,173			3,084			(16,960	)		119,879
Interest rate swaps, options and forwards			39,104			91,001			177,410			(62,126	)		245,389
Total		$	206,195		$	143,085		$	239,953		$	(81,430	)		507,803
Cross product counterparty netting															(8,871	)
Total OTC derivative liabilities included in Financial instruments sold, not yet purchased														$	498,932
-1	At August 31, 2014, we held exchange traded derivative liabilities and other credit agreements with a fair value of $19.2 million, which are not included in this table.
-2	OTC derivative liabilities in the table above are gross of collateral pledged. OTC derivative liabilities are recorded net of collateral pledged on the Consolidated Statements of Financial Condition. At August 31, 2014, cash collateral pledged was $251.3 million.
-3	Derivative fair values include counterparty netting within product category.
-4	Amounts represent the netting of receivable balances with payable balances for the same counterparty within product category across maturity categories.
At August 31, 2014, the counterparty credit quality with respect to the fair value of our OTC derivatives assets was as follows (in thousands):
Counterparty credit quality (1):
A- or higher		$	326,452
BBB- to BBB+			69,223
BB+ or lower			54,989
Unrated			98,968
Total		$	549,632
-1	We utilize internal credit ratings determined by our Risk Management. Credit ratings determined by Risk Management use methodologies that produce ratings generally consistent with those produced by external rating agencies.
Contingent Features
Certain of our derivative instruments contain provisions that require our debt to maintain an investment grade credit rating from each of the major credit rating agencies. If our debt were to fall below investment grade, it would be in violation of these provisions and the counterparties to the derivative instruments could request immediate payment or demand immediate and ongoing full overnight collateralization on our derivative instruments in liability positions. The aggregate fair value of all derivative instruments with such credit-risk-related contingent features that are in a liability position at August 31, 2014 and November 30, 2013 is $85.8 million and $170.2 million, respectively, for which we have posted collateral of $65.1 million and $127.7 million, respectively, in the normal course of business. If the credit-risk-related contingent features underlying these agreements were triggered on August 31, 2014 and November 30, 2013, we would have been required to post an additional $23.8 million and $49.4 million, respectively, of collateral to our counterparties.

Collateralized_Transactions

Collateralized Transactions	9 Months Ended
	Aug. 31, 2014
Banking and Thrift [Abstract]	'
Collateralized Transactions	'
	Note 7. Collateralized Transactions
	We enter into secured borrowing and lending arrangements to obtain collateral necessary to effect settlement, finance inventory positions, meet customer needs or re-lend as part of our dealer operations. We monitor the fair value of the securities loaned and borrowed on a daily basis as compared with the related payable or receivable, and request additional collateral or return excess collateral, as appropriate. We pledge financial instruments as collateral under repurchase agreements, securities lending agreements and other secured arrangements, including clearing arrangements. Our agreements with counterparties generally contain contractual provisions allowing the counterparty the right to sell or repledge the collateral. Pledged securities owned that can be sold or repledged by the counterparty are included within Financial instruments owned and noted parenthetically as Securities pledged on our Consolidated Statements of Financial Condition.
	We receive securities as collateral under resale agreements, securities borrowing transactions and customer margin loans. We also receive securities as collateral in connection with securities-for-securities transactions in which we are the lender of securities. In many instances, we are permitted by contract or custom to rehypothecate the securities received as collateral. These securities may be used to secure repurchase agreements, enter into securities lending transactions, satisfy margin requirements on derivative transactions or cover short positions. At August 31, 2014 and November 30, 2013, the approximate fair value of securities received as collateral by us that may be sold or repledged was $24.8 billion and $21.9 billion, respectively.
	At August 31, 2014 and November 30, 2013, a substantial portion of the securities received by us had been sold or repledged.
	In instances where we receive securities as collateral in connection with securities-for-securities transactions in which we are the lender of securities and are permitted to sell or repledge the securities received as collateral, we report the fair value of the collateral received and the related obligation to return the collateral in the Consolidated Statements of Financial Condition. At August 31, 2014 and November 30, 2013, $8.3 million and $11.1 million, respectively, were reported as Securities received as collateral and as Obligation to return securities received as collateral.
	Offsetting of Securities Financing Agreements
	To manage our exposure to credit risk associated with securities financing transactions, we may enter into master netting agreements and collateral arrangements with counterparties. Generally, transactions are executed under standard industry agreements, including, but not limited to, master securities lending agreements (securities lending transactions) and master repurchase agreements (repurchase transactions). A master agreement creates a single contract under which all transactions between two counterparties are executed allowing for trade aggregation and a single net payment obligation. Master agreements provide protection in bankruptcy in certain circumstances and, where legally enforceable, enable receivables and payables with the same counterparty to be settled or otherwise eliminated by applying amounts due against all or a portion of an amount due from the counterparty or a third party. In addition, we enter into customized bilateral trading agreements and other customer agreements that provide for the netting of receivables and payables with a given counterparty as a single net obligation.
	In the event of the counterparty’s default, provisions of the master agreement permit acceleration and termination of all outstanding transactions covered by the agreement such that a single amount is owed by, or to, the non-defaulting party. In addition, any collateral posted can be applied to the net obligations, with any excess returned; and the collateralized party has a right to liquidate the collateral. Any residual claim after netting is treated along with other unsecured claims in bankruptcy court.
	The conditions supporting the legal right of offset may vary from one legal jurisdiction to another and the enforceability of master netting agreements and bankruptcy laws in certain countries or in certain industries is not free from doubt. The right of offset is dependent both on contract law under the governing arrangement and consistency with the bankruptcy laws of the jurisdiction where the counterparty is located. Industry legal opinions with respect to the enforceability of certain standard provisions in respective jurisdictions are relied upon as a part of managing credit risk. Master netting agreements are a critical component of our risk management processes as part of reducing counterparty credit risk and managing liquidity risk.
	We are also a party to clearing agreements with various central clearing parties. Under these arrangements, the central clearing counterparty facilitates settlement between counterparties based on the net payable owed or receivable due and, with respect to daily settlement, cash is generally only required to be deposited to the extent of the net amount. In the event of default, a net termination amount is determined based on the market values of all outstanding positions and the clearing organization or clearing member provides for the liquidation and settlement of the net termination amount among all counterparties to the open repurchase and/or securities lending transactions.
	The following tables provide information regarding repurchase agreements and securities borrowing and lending arrangements that are recognized in the Consolidated Statements of Financial Condition and 1) the extent to which, under enforceable master netting arrangements, such balances are presented net in the Consolidated Statements of Financial Condition as appropriate under GAAP and 2) the extent to which other rights of setoff associated with these arrangements exist and could have an effect on our financial position (in thousands). See Note 6, Derivative Financial Instruments, for information related to offsetting of derivatives.
			August 31, 2014
					Netting in			Net Amounts in
					Consolidated			Consolidated		Additional
					Statement of			Statement of		Amounts
			Gross		Financial			Financial		Available for			Available
			Amounts		Condition			Condition		Setoff (1)			Collateral (2)			Net Amount (3)
	Assets
	Securities borrowing arrangements		$	6,270,452	$	—		$	6,270,452	$	(555,662	)	$	(977,138	)	$	4,737,652
	Reverse repurchase agreements		$	13,768,047	$	(9,197,514	)	$	4,570,533	$	(547,636	)	$	(3,987,093	)	$	35,804
	Liabilities
	Securities lending arrangements		$	2,468,513	$	—		$	2,468,513	$	(555,662	)	$	(1,883,794	)	$	29,057
	Repurchase agreements		$	19,729,573	$	(9,197,514	)	$	10,532,059	$	(547,636	)	$	(9,301,230	)	$	683,193
	-1	Under master netting agreements with our counterparties, we have the legal right of offset with a counterparty, which incorporates all of the counterparty’s outstanding rights and obligations under the arrangement. These balances reflect additional credit risk mitigation that is available by counterparty in the event of a counterparty’s default, but which are not netted in the balance sheet because other netting provisions of U.S. GAAP are not met.
	-2	Includes securities received or paid under collateral arrangements with counterparties that could be liquidated in the event of a counterparty default and thus offset against a counterparty’s rights and obligations under the respective repurchase agreements or securities borrowing or lending arrangements.
	-3	Amounts include $4,700.3 million of securities borrowing arrangements, for which we have received securities collateral of $4,579.8 million, and $667.4 million of repurchase agreements, for which we have pledged securities collateral of $694.5 million, which are subject to master netting agreements but we have not yet determined the agreements to be legally enforceable.
			November 30, 2013
			Gross		Netting in			Net Amounts in		Additional			Available			Net Amount (3)
			Amounts		Consolidated			Consolidated		Amounts			Collateral (2)
					Statement of			Statement of		Available for
					Financial			Financial		Setoff (1)
					Condition			Condition
	Assets
	Securities borrowing arrangements		$	5,359,846	$	—		$	5,359,846	$	(530,293	)	$	(957,140	)	$	3,872,413
	Reverse repurchase agreements		$	12,715,449	$	(8,968,529	)	$	3,746,920	$	(590,754	)	$	(3,074,540	)	$	81,626
	Liabilities
	Securities lending arrangements		$	2,506,122	$	—		$	2,506,122	$	(530,293	)	$	(1,942,271	)	$	33,558
	Repurchase agreements		$	19,748,374	$	(8,968,529	)	$	10,779,845	$	(590,754	)	$	(8,748,641	)	$	1,440,450
	-1	Under master netting agreements with our counterparties, we have the legal right of offset with a counterparty, which incorporates all of the counterparty’s outstanding rights and obligations under the arrangement. These balances reflect additional credit risk mitigation that is available by counterparty in the event of a counterparty’s default, but which are not netted in the balance sheet because other netting provisions of U.S. GAAP are not met.
	-2	Includes securities received or paid under collateral arrangements with counterparties that could be liquidated in the event of a counterparty default and thus offset against a counterparty’s rights and obligations under the respective repurchase agreements or securities borrowing or lending arrangements.
	-3	Amounts include $3,818.4 million of securities borrowing arrangements, for which we have received securities collateral of $3,721.8 million, and $1,410.0 million of repurchase agreements, for which we have pledged securities collateral of $1,438.9 million, which are subject to master netting agreements but we have not yet determined the agreements to be legally enforceable.
	Cash and Securities Segregated and on Deposit for Regulatory Purposes or Deposited with Clearing and Depository Organizations
	Cash and securities deposited with clearing and depository organizations and segregated in accordance with regulatory regulations totaled $3,301.2 million and $3,616.6 million at August 31, 2014 and November 30, 2013, respectively. Segregated cash and securities consist of deposits in accordance with Rule 15c3-3 of the Securities Exchange Act of 1934, which subjects Jefferies as a broker-dealer carrying customer accounts to requirements related to maintaining cash or qualified securities in segregated special reserve bank accounts for the exclusive benefit of its customers, and with the Commodity Exchange Act, which subjects Jefferies Bache, LLC as a futures commission merchant to segregation requirements.

Securitization_Activities

Securitization Activities	9 Months Ended
	Aug. 31, 2014
Transfers and Servicing [Abstract]	'
Securitization Activities	'
	Note 8. Securitization Activities
	We engage in securitization activities related to corporate loans, commercial mortgage loans and mortgage-backed and other asset-backed securities. In our securitization transactions, we transfer these assets to special purpose entities (“SPEs”) and act as the placement or structuring agent for the beneficial interests sold to investors by the SPE. A significant portion of our securitization transactions are securitization of assets issued or guaranteed by U.S. government agencies. These SPEs generally meet the criteria of variable interest entities; however we generally do not consolidate the SPEs as we are not considered the primary beneficiary for these SPEs. See Note 9, Variable Interest Entities for further discussion on variable interest entities and our determination of the primary beneficiary.
	We account for our securitization transactions as sales provided we have relinquished control over the transferred assets. Transferred assets are carried at fair value with unrealized gains and losses reflected in Principal transactions revenues in the Consolidated Statement of Earnings prior to the identification and isolation for securitization. Subsequently, revenues recognized upon securitization are reflected as net underwriting revenues. We generally receive cash proceeds in connection with the transfer of assets to an SPE. We may, however, have continuing involvement with the transferred assets, which is limited to retaining one or more tranches of the securitization (primarily senior and subordinated debt securities in the form of mortgage- and other-asset backed securities or collateralized loan obligations), which are included within Financial instruments owned and are generally initially categorized as Level 2 within the fair value hierarchy. We apply fair value accounting to the securities.
	The following table presents activity related to our securitizations that were accounted for as sales in which we had continuing involvement (in millions):
		Successor								Predecessor
		Three Months Ended		Nine Months Ended		Three Months Ended		Six Months Ended		Three Months Ended
		August 31, 2014		August 31, 2014		August 31, 2013		August 31, 2013		February 28, 2013
	Transferred assets	$	1,562.10	$	4,788.70	$	918.4	$	3,102.40	$	2,735.20
	Proceeds on new securitizations		1,567.20		4,795.40		921.5		3,112.50		2,751.30
	Cash flows received on retained interests	$	15.2	$	37.9	$	13	$	24.2	$	32.3
	We have no explicit or implicit arrangements to provide additional financial support to these SPEs, have no liabilities related to these SPEs and do not have any outstanding derivative contracts executed in connection with these securitization activities at August 31, 2014 and November 30, 2013.
	The following tables summarize our retained interests in SPEs where we transferred assets and have continuing involvement and received sale accounting treatment (in millions):
		August 31, 2014
	Securitization Type	Total Assets		Retained Interests
	U.S. government agency residential mortgage-backed securities	$	17,478.60	$	312.5
	U.S. government agency commercial mortgage-backed securities		5,046.30		100.5
	Collateralized loan obligations		2,711.30		42.7
		November 30, 2013
	Securitization Type	Total Assets		Retained Interests
	U.S. government agency residential mortgage-backed securities	$	11,518.40	$	281.3
	U.S. government agency commercial mortgage-backed securities		5,385.60		96.8
	Collateralized loan obligations		728.5		9
	Total assets represent the unpaid principal amount of assets in the SPEs in which we have continuing involvement and are presented solely to provide information regarding the size of the transaction and the size of the underlying assets supporting our retained interests, and are not considered representative of the risk of potential loss. Assets retained in connection with a securitization transaction represent the fair value of the securities of one or more tranches issued by an SPE, including senior and subordinated tranches. Our risk of loss is limited to this fair value amount which is included within total Financial instruments owned on our Consolidated Statements of Financial Condition.
	Although not obligated, in connection with secondary market-making activities we may make a market in the securities issued by these SPEs. In these market-making transactions, we buy these securities from and sell these securities to investors. Securities purchased through these market-making activities are not considered to be continuing involvement in these SPEs, although the securities are included in Financial instruments owned. To the extent the securities purchased through these market-marking activities meet specific thresholds and we are not deemed to be the primary beneficiary of the variable interest entity, these securities are included in agency and non-agency mortgage- and asset-backed securitizations in the nonconsolidated variable interest entities table presented in Note 9, Variable Interest Entities.
	If we have not relinquished control over the transferred assets, the assets continue to be recognized in Financial instruments owned and a corresponding liability is recognized in Other secured financings. The carrying value of assets and liabilities resulting from transfers of financial assets treated as secured financings was $12.7 million and $12.7 million, respectively, at August 31, 2014 and $8.7 million and $8.7 million, respectively, at November 30, 2013. The related liabilities do not have recourse to our general credit.

Variable_Interest_Entities

Variable Interest Entities	9 Months Ended
	Aug. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
Variable Interest Entities	'
	Note 9. Variable Interest Entities
	Variable interest entities (“VIEs”) are entities in which equity investors lack the characteristics of a controlling financial interest. VIEs are consolidated by the primary beneficiary. The primary beneficiary is the party who has both (1) the power to direct the activities of a variable interest entity that most significantly impact the entity’s economic performance and (2) an obligation to absorb losses of the entity or a right to receive benefits from the entity that could potentially be significant to the entity.
	Our variable interests in VIEs include debt and equity interests, commitments, guarantees and certain fees. Our involvement with VIEs arises primarily from:
		•		Purchases of securities in connection with our trading and secondary market making activities,
		•		Retained interests held as a result of securitization activities, including the resecuritization of mortgage- and other asset-backed securities and the securitization of commercial mortgage and corporate loans,
		•		Acting as placement agent and/or underwriter in connection with client-sponsored securitizations,
		•		Financing of agency and non-agency mortgage- and other asset-backed securities,
		•		Warehousing funding arrangements for client-sponsored consumer loan vehicles and collateralized loan obligations (“CLOs”) through participation certificates and revolving loan commitments, and
		•		Loans to, investments in and fees from various investment fund vehicles.
	We determine whether we are the primary beneficiary of a VIE upon our initial involvement with the VIE and we reassess whether we are the primary beneficiary of a VIE on an ongoing basis. Our determination of whether we are the primary beneficiary of a VIE is based upon the facts and circumstances for each VIE and requires significant judgment. Our considerations in determining the VIE’s most significant activities and whether we have power to direct those activities include, but are not limited to, the VIE’s purpose and design and the risks passed through to investors, the voting interests of the VIE, management, service and/or other agreements of the VIE, involvement in the VIE’s initial design and the existence of explicit or implicit financial guarantees. In situations where we have determined that the power over the VIE’s most significant activities is shared, we assess whether we are the party with the power over the majority of the significant activities. If we are the party with the power over the majority of the significant activities, we meet the “power” criteria of the primary beneficiary. If we do not have the power over a majority of the significant activities or we determine that decisions require consent of each sharing party, we do not meet the “power” criteria of the primary beneficiary.
	We assess our variable interests in a VIE both individually and in aggregate to determine whether we have an obligation to absorb losses of or a right to receive benefits from the VIE that could potentially be significant to the VIE. The determination of whether our variable interest is significant to the VIE requires significant judgment. In determining the significance of our variable interest, we consider the terms, characteristics and size of the variable interests, the design and characteristics of the VIE, our involvement in the VIE and our market-making activities related to the variable interests.
	Consolidated VIEs
	The following table presents information about our consolidated VIEs at August 31, 2014 and November 30, 2013 (in millions). The assets and liabilities in the tables below are presented prior to consolidation and thus a portion of these assets and liabilities are eliminated in consolidation.
			August 31, 2014				November 30, 2013
			Securitization		Other		Securitization		Other
			Vehicles				Vehicles
	Cash		$	—	$	0.2	$	—	$	0.2
	Financial instruments owned			56.9		0.3		97.5		0.4
	Securities purchased under agreement to resell (1)			585.2		—		195.1		—
	Fees, interest and other receivables			1		—		—		—
	Other assets			—		—		2.3		—
			$	643.1	$	0.5	$	294.9	$	0.6
	Other secured financings (2)		$	641.9	$	—	$	292.5	$	—
	Other liabilities			1.2		0.2		2.1		0.2
			$	643.1	$	0.2	$	294.6	$	0.2
	-1	Securities purchased under agreement to resell represent an amount due under a collateralized transaction on a related consolidated entity, which is eliminated in consolidation.
	-2	Approximately $37.9 million and $66.5 million of the secured financing represents an amount held by us in inventory and is eliminated in consolidation at August 31, 2014 and November 30, 2013, respectively.
	Securitization Vehicles. We are the primary beneficiary of a securitization vehicle to which we transferred term loans backed by consumer installment receivables and retained a portion of the securities issued by the securitization vehicle. In the creation of the securitization vehicle, we were involved in the decisions made during the establishment and design of the entity and hold variable interests consisting of the securities retained that could potentially be significant. The assets of the VIE consist of the term loans backed by consumer installment receivables, which are available for the benefit of the vehicle’s beneficial interest holders. The creditors of the VIE do not have recourse to our general credit.
	We are also the primary beneficiary of mortgage-backed financing vehicles to which we sell agency and non-agency residential and commercial mortgage-backed securities pursuant to the terms of a master repurchase agreement. We manage the assets within these vehicles. Our variable interests in these vehicles consist of our collateral margin maintenance obligations under the master repurchase agreement. The assets of these VIEs consist of reverse repurchase agreements, which are available for the benefit of the vehicle’s debt holders. The creditors of these VIEs do not have recourse to our general credit.
	At November 30, 2013, we were the primary beneficiary of a securitization vehicle to which we transferred a corporate loan and retained a portion of the securities issued by the securitization vehicle. During the second quarter of 2014, the loan was repaid, the securities issued by the securitization vehicle were redeemed and the securitization vehicle was terminated. As a result, the securitization vehicle is no longer consolidated by us at August 31, 2014 and no gain or loss was recognized upon deconsolidation.
	Other. We are the primary beneficiary of certain investment vehicles set up for the benefit of our employees. We manage and invest alongside our employees in these vehicles. The assets of these VIEs consist of private equity securities, and are available for the benefit of the entities’ equity holders. Our variable interests in these vehicles consist of equity securities. The creditors of these VIEs do not have recourse to our general credit.
	Nonconsolidated VIEs
	The following tables present information about our variable interests in nonconsolidated VIEs. (in millions).
			August 31, 2014
			Carrying Amount				Maximum
			Assets		Liabilities		Exposure to loss		VIE Assets
	Collateralized loan obligations		$	51	$	0.1	$	245	$	4,897.50
	Consumer loan financing vehicles			133.6		—		367.5		261.8
	Asset management vehicle (1)			3.6		—		3.6		310.1
	Private equity vehicles (1)			47.2		—		62.1		98.8
	Total		$	235.4	$	0.1	$	678.2	$	5,568.20
			November 30, 2013
			Carrying Amount				Maximum
			Assets		Liabilities		Exposure to loss		VIE Assets
	Collateralized loan obligations		$	11.9	$	0.2	$	88.8	$	1,122.30
	Asset management vehicle (1)			3.5		—		3.5		454.2
	Private equity vehicles (1)			40.8		—		68.8		89.4
	Total		$	56.2	$	0.2	$	161.1	$	1,665.90
	-1	Assets consist of equity interests, which are included within Investments in managed funds.
	Our maximum exposure to loss often differs from the carrying value of the variable interests. The maximum exposure to loss is dependent on the nature of our variable interests in the VIEs and is limited to the notional amounts of certain loan commitments and guarantees. Our maximum exposure to loss does not include the offsetting benefit of any financial instruments that may be utilized to hedge the risks associated with our variable interests and is not reduced by the amount of collateral held as part of a transaction with a VIE.
	Collateralized Loan Obligations. Assets collateralizing the CLOs include bank loans, participation interests and sub-investment grade and senior secured U.S. loans. We underwrite securities issued in CLO transactions on behalf of unaffiliated sponsors and provide advisory services to the unaffiliated sponsors. We may also sell corporate loans to the CLOs. Our variable interests in connection with collateralized loan obligations where we have been involved in providing underwriting and/or advisory services consist of the following:
		•		Forward sale agreements whereby we commit to sell, at a fixed price, corporate loans and ownership interests in an entity holding such corporate loans to CLOs
		•		Warehouse funding arrangements in the form of participation interests in corporate loans held by CLOs and commitments to fund such participation interests
		•		Retention of unsold securities issued in a CLO transaction
		•		Investments in variable funding notes issued by CLOs
		•		A guarantee to a CLO managed by Jefferies Finance, whereby we guarantee certain of the obligations of Jefferies Finance to the CLO
	In addition, we own variable interests in CLOs previously managed by us. Our variable interests consist of debt securities and a right to a portion of the CLOs’ management and incentive fees. Our exposure to loss from these CLOs is limited to our investments in the debt securities held. Management and incentives fees are accrued as the amounts become realizable. These CLOs represent interests in assets consisting primarily of senior secured loans, unsecured loans and high yield bonds.
	Consumer Loan Financing Vehicles. The underlying assets, which are collateralizing the vehicles, are primarily comprised of unsecured consumer installment loans. We provide financing and lending related services to certain client-sponsored VIEs in the form of revolving funding note agreements and revolving credit facilities. In addition, we may provide structuring and advisory services and act as an underwriter or placement agent for securities issued by the vehicles. We do not control the activities of these entities.
	Asset Management Vehicle. We manage the Jefferies Umbrella Fund, an “umbrella structure” company that invests primarily in convertible bonds and enables investors to choose between one or more investment objectives by investing in one or more sub-funds within the same structure. Accounting changes to consolidation standards under generally accepted accounting principles have been deferred for entities that are considered to be investment companies; accordingly, consolidation continues to be determined under a risk and reward model. The Jefferies Umbrella Fund is subject to the deferral guidance and we are not the primary beneficiary at August 31, 2014 and November 30, 2013 under the risk and reward model. Our variable interests in the Jefferies Umbrella Fund consist of equity interests, management fees and performance fees.
	Private Equity Vehicles. On July 26, 2010, we committed to invest equity of up to $75.0 million in Jefferies SBI USA Fund L.P. (the “SBI USA Fund”). At August 31, 2014 and November 30, 2013, we funded approximately $60.1 million and $47.0 million, respectively, of our commitment. The carrying amount of our equity investment was $45.9 million and $39.2 million at August 31, 2014 and November 30, 2013, respectively. Our exposure to loss is limited to our equity commitment. The SBI USA Fund has assets consisting primarily of private equity and equity related investments.
	We have a variable interest in Jefferies Employees Partners IV, LLC (“JEP IV”) consisting of an equity investment. The carrying amount of our equity investment was $1.3 million and $1.6 million at August 31, 2014 and November 30, 2013, respectively. Our exposure to loss is limited to our equity investment. JEP IV has assets consisting primarily of private equity and equity related investments.
	Mortgage- and Other Asset-Backed Securitization Vehicles. In connection with our secondary trading and market making activities, we buy and sell agency and nonagency mortgage- backed securities and other asset-backed securities, which are .issued by third party securitization SPEs and are generally considered variable interests in VIEs. Securities issued by securitization SPEs are backed by residential mortgage loans, U.S. agency collateralized mortgage obligations, commercial mortgage loans, collateralized debt obligations and CLOs and other consumer loans, such as installment receivables, auto loans and student loans. These securities are accounted for at fair value and included in Financial instruments owned on our Consolidated Statements of Financial Condition. We have no other involvement with the related SPEs and therefore do not consolidate these entities.
	We also engage in underwriting, placement and structuring activities for third-party-sponsored securitization trusts generally through agency (Fannie Mae, Freddie Mac and Ginnie Mae) or nonagency sponsored SPEs and may purchase loans or mortgage-backed securities from third parties that are subsequently transferred into the securitization trusts. The securitizations are backed by residential and commercial mortgage, home equity and auto loans. We do not consolidate agency sponsored securitizations as we do not have the power to direct the activities of the SPEs that most significantly impact their economic performance. Further, we are not the servicer of nonagency-sponsored securitizations and therefore do not have power to direct the most significant activities of the SPEs and accordingly, do not consolidate these entities. We may retain unsold senior and/or subordinated interests at the time of securitization in the form of securities issued by the SPEs.
We transfer existing securities, typically mortgage-backed securities, into resecuritization vehicles. These transactions in which debt securities are transferred to a VIE in exchange for new beneficial interests occur in connection with both agency and nonagency sponsored VIEs. Our consolidation analysis is largely dependent on our role and interest in the resecuritization trusts. Most resecuritizations in which we are involved are in connection with investors seeking securities with specific risk and return characteristics. As such, we have concluded that the decision-making power is shared between us and the investor(s), considering the joint efforts involved in structuring the trust and selecting the underlying assets as well as the level of security interests the investor(s) hold in the SPE; therefore, we do not consolidate the resecuritization VIEs.
At August 31, 2014 and November 30, 2013, we held $2,874.9 million and $3,476.2 million of agency mortgage-backed securities, respectively, and $910.0 million and $985.0 million of nonagency mortgage- and other asset-backed securities, respectively, as a result of our secondary trading and market making activities, underwriting, placement and structuring activities and resecuritization activities. Our maximum exposure to loss on these securities is limited to the carrying value of our investments in these securities. Mortgage- and other asset-backed securitization vehicles discussed within this section are not included in the above table containing information about our variable interests in nonconsolidated VIEs.

Investments

Investments	9 Months Ended
	Aug. 31, 2014
Investments Schedule [Abstract]	'
Investments	'
	Note 10. Investments
	We have investments in Jefferies Finance, LLC (“Jefferies Finance”), Jefferies LoanCore LLC (“Jefferies LoanCore”) and KCG Holdings, Inc. (“Knight”). Our investment in Knight is accounted for at fair value by electing the fair value option available under U.S. GAAP and is included in Financial instruments owned, at fair value – Corporate equity securities on the Consolidated Statements of Financial Condition with changes in fair value recognized in Principal transaction revenues on the Consolidated Statements of Earnings. Our investments in Jefferies Finance and Jefferies LoanCore are accounted for under the equity method and are included in Loans to and investments in related parties on the Consolidated Statements of Financial Condition with our share of the investees’ earnings recognized in Other revenues in the Consolidated Statements of Earnings.
	Jefferies Finance
	On October 7, 2004, we entered into an agreement with Babson Capital Management LLC (“Babson Capital”) and Massachusetts Mutual Life Insurance Company (“MassMutual”) to form Jefferies Finance, a joint venture entity. Jefferies Finance is a commercial finance company whose primary focus is the origination and syndication of senior secured debt to middle market and growth companies in the form of term and revolving loans. Loans are originated primarily through the investment banking efforts of Jefferies, with Babson Capital providing primary credit analytics and portfolio management services. Jefferies Finance can also originate other debt products such as second lien term, bridge and mezzanine loans, as well as related equity co-investments. Jefferies Finance also purchases syndicated loans in the secondary market, including loans that are performing, stressed and distressed loan obligations.
	At August 31, 2014, we and MassMutual each have equity commitments to Jefferies Finance of $600.0 million for a combined total commitment of $1.2 billion. At August 31, 2014, we have funded $360.0 million of our $600.0 million commitment, leaving $240.0 million unfunded. The investment commitment is scheduled to expire on March 1, 2016 with automatic one year extensions absent a 60 day termination notice by either party.
	Jefferies Finance has executed a Secured Revolving Credit Facility with us and MassMutual, to be funded equally, to support loan underwritings by Jefferies Finance. The Secured Revolving Credit Facility bears interest based on the interest rates of the related Jefferies Finance underwritten loans and is secured by the underlying loans funded by the proceeds of the facility. The total committed Secured Revolving Credit Facility is $1.0 billion, comprised of committed and discretionary advances totaling $700.0 million and $300.0 million, respectively, at August 31, 2014. Committed advances are shared equally between us and MassMutual but discretionary advances maybe funded in unequal amounts if agreed between MassMutual and us. The facility is scheduled to mature on March 1, 2016 with automatic one year extensions absent a 60 day termination notice by either party. At August 31, 2014 and November 30, 2013, we have funded $-0- million and $123.8 million, respectively, of our $350.0 million commitment. During the three and nine months ended August 31, 2014, $0.3 million and $1.4 million of interest income and $0.4 million and $1.5 million of unfunded commitment fees, respectively, are included in the Consolidated Statements of Earnings related to the Secured Revolving Credit Facility. During the three and six months ended August 31, 2013 and the three months ended February 28, 2013, we earned interest income of $0.4 million, $0.8 million and $4.1 million and unfunded commitment fees of $0.4 million, $0.8 million and $0.3 million, respectively.
	The following is a summary of selected financial information for Jefferies Finance (in millions):
		August 31,		November 30,
		2014		2013
	Total assets	$	5,109.70	$	3,271.90
	Total liabilities		4,389.70		2,597.00
	Total equity		720		674.9
	Our total equity balance		360		337.3
	The net earnings of Jefferies Finance were $58.0 million and $116.2 million for the three and nine months ended August 31, 2014, respectively, and $30.5 million and $87.5 million for the three and nine months ended August 31, 2013, respectively.
	We engage in debt capital markets transactions with Jefferies Finance related to the originations of loans by Jefferies Finance. In connection with such transactions, we earned net underwriting fees of $53.7 million and $139.8 million during the three and nine months ended August 31, 2014, respectively, and $35.2 million, $70.4 million and $39.9 million during the three and six months ended August 31, 2013 and the three months ended February 28, 2013, respectively, recognized in Investment banking revenues on the Consolidated Statements of Earnings. In addition, we paid fees to Jefferies Finance regarding certain loans originated by Jefferies Finance of $2.6 million and $10.5 million during the three and nine months ended August 31, 2014, respectively, and $2.5 million, $8.7 million and $0.8 million during the three and six months ended August 31, 2013 and the three months ended February 28, 2013, respectively, which are recognized as Business development expenses on the Consolidated Statements of Earnings. During the third quarter of 2014, we acted as placement agent in connection with a CLO managed by Jefferies Finance. As part of the transaction, we purchased securities issued by the CLO, which are included within Financial instruments owned. Additionally, we have entered into a derivative contract with Jefferies Finance whose underwriting is based on certain securities issued by the CLO. In connection with our roles related to the execution of the CLO, we recognized revenue of $0.7 million during the three months ended August 31, 2014.
	Under a service agreement, we charged Jefferies Finance $6.5 million and $35.2 million for services provided during the three and nine months ended August 31, 2014, respectively, and $4.1 million, $9.5 million and $15.7 million for the three and six months ended August 31, 2013 and the three months ended February 28, 2013, respectively. Receivables from Jefferies Finance, included within Other assets on the Consolidated Statements of Financial Condition, were $30.3 million and $31.1 million at August 31, 2014 and November 30, 2013, respectively.
	Jefferies LoanCore
	On February 23, 2011, we entered into a joint venture agreement with the Government of Singapore Investment Corporation and LoanCore, LLC and formed Jefferies LoanCore, a commercial real estate finance company. Jefferies LoanCore originates and purchases commercial real estate loans throughout the United States with the support of the investment banking and securitization capabilities of Jefferies and the real estate and mortgage investment expertise of the Government of Singapore Investment Corporation and LoanCore, LLC. Jefferies LoanCore has aggregate equity commitments of $600.0 million. At August 31, 2014 and November 30, 2013, we have funded $197.5 million and $175.5 million, respectively, of our $291.0 million equity commitment and have a 48.5% voting interest in Jefferies LoanCore.
	The following is a summary of selected financial information for Jefferies LoanCore (in millions):
		August 31,		November 30,
		2014		2013
	Total assets	$	1,319.70	$	974.9
	Total liabilities		804.7		507.9
	Total equity		515		467
	Our total equity balance		249.8		226.5
	The net earnings of Jefferies LoanCore were $4.5 million and $16.3 million for the three and nine months ended August 31, 2014, respectively, and $16.7 million and $65.8 million for the three and nine months ended August 31, 2013, respectively.
	Under a service agreement, we charged Jefferies LoanCore $22,000 and $0.1 million for the three and nine months ended August 31, 2014, respectively, and $0.1 million, $0.2 million and $0.6 million for the three and six months ended August 31, 2013 and the three months ended February 28, 2013, respectively. Receivables from Jefferies LoanCore, included within Other assets on the Consolidated Statements of Financial Condition, were $9,000 and $230,000 at August 31, 2014 and November 30, 2013, respectively.
	In connection with the securitization of commercial real estate loans originated by Jefferies LoanCore, we earned placement fees of $-0- and $0.6 million, respectively, during the three and nine months ended August 31, 2014.
	Knight Capital
	On August 6, 2012, we entered into a Securities Purchase Agreement with Knight Capital Group, Inc., a publicly-traded global financial services firm, (“the Agreement”). Under the Agreement, we purchased preferred stock, which contained certain conversion options, in exchange for cash consideration of $125.0 million. On August 29, 2012, we exercised our conversion options and converted our holding of Series A Securities to common stock. On July 1, 2013, Knight Capital Group, Inc. merged with GETCO Holding Company, LLC (the merged company referred to as “KCG Holdings, Inc.”). In connection with the consummation of the merger, we received cash consideration of $3.75 per share, or approximately $192.0 million, with respect to approximately 63% of our holdings in Knight Capital Group, Inc. and stock consideration of one third of a share of KCG Holdings, Inc. common stock for each share of Knight Capital Group Inc. common stock for the remainder of our holdings. At August 31, 2014, we owned approximately 19% of the outstanding common stock of Knight.
	We elected to record our investment in Knight at fair value under the fair value option as the investment was acquired as part of our capital markets activities. The valuation of our investment at August 31, 2014 is based on the closing exchange price of Knight’s common stock and included within Level 1 of the fair value hierarchy. Changes in the fair value of our investment of $(6.5) million and $0.1 million for the three and nine months ended August 31, 2014, respectively, and $(16.0) million, $(21.7) million and $26.5 million for the three and six months ended August 31, 2013 and the three months ended February 28, 2013, respectively, are recognized in Revenues—Principal transactions on the Consolidated Statement of Earnings.
	The following is a summary of selected financial information for Knight at June 30, 2014, the most recently available public financial information for the company (in millions):
		June 30,
		2014
	Total assets	$	7,662.50
	Total liabilities		6,128.80
	Total equity		1,533.70
	Knight’s net income was $9.0 million and $44.6 million for the three and six months ended June 30, 2014, respectively.
	We have separately entered into securities lending transactions with Knight in the normal course of our capital markets activities. At August 31, 2014, the balances of securities borrowed and securities loaned were $6.8 million and $6.9 million, respectively, and at November 30, 2013, $11.0 million and $22.7 million, respectively.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	9 Months Ended
	Aug. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Other Intangible Assets	'
	Note 11. Goodwill and Other Intangible Assets
	In connection with the Leucadia Transaction, goodwill of $1.7 billion was recorded on March 1, 2013. In addition, at March 1, 2013, certain existing intangible assets and new intangible assets were identified and recorded at their fair values. See Note 4, Leucadia and Related Transactions for further information.
	Goodwill
	Goodwill resulting from the Leucadia Transaction attributed to our reportable segments are as follows (in thousands):
			August 31, 2014			November 30, 2013
	Capital Markets		$	1,718,519		$	1,717,246
	Asset Management			5,100			5,100
	Total goodwill		$	1,723,619		$	1,722,346
	The following table is a summary of the changes to goodwill for the three and nine months ended August 31, 2014, the nine months ended November 30, 2013 and the three months ended February 28, 2013 (in thousands):
			Successor											Predecessor
			Three Months Ended			Nine Months Ended			Nine Months Ended					Three Months Ended
			August 31, 2014			August 31, 2014			November 30, 2013					February 28, 2013
	Balance, at beginning of period		$	1,725,117		$	1,722,346		$	1,720,380				$	365,670
	Less: Disposal			—			—			(5,700	)(1)				—
	Add: Contingent consideration			—			—			—					2,394	(2)
	Add: Translation adjustments			(1,498	)		1,273			7,666					(1,287	)
	Balance, at end of period		$	1,723,619		$	1,723,619		$	1,722,346				$	366,777	(3)
	-1	As a result of a restructuring of our ownership interest in the commodities asset management business, we no longer hold a controlling interest and accordingly do not consolidate this business. In addition, we sold Jefferies International Management Limited to Leucadia. Goodwill associated with these entities was included in the net assets disposed of in the transactions.
	-2	Contingent consideration recorded during the three months ended February 28, 2013 relates to the lapse of certain conditions as specified in the purchase agreements associated with an acquisition in 2007.
	-3	Predecessor Company goodwill at February 28, 2013 was reduced to $-0- at March 1, 2013, as a result of purchase accounting adjustments.
	Goodwill Impairment Testing
	Goodwill associated with the Leucadia transaction is allocated to related reporting units, which are determined based on financial information provided to management in connection with its management of the businesses. A reporting unit is an operating segment or one level below an operating segment. As part of the push down of the acquisition method of accounting for the transaction and the resulting creation of a new Successor reporting entity, our annual goodwill impairment testing date is designated as August 1.
	The quantitative goodwill impairment test is performed at the level of the reporting unit and consists of two steps. In the first step, the fair value of each reporting unit is compared with its carrying value, including goodwill and allocated intangible assets. If the fair value is in excess of the carrying value, the goodwill for the reporting unit is considered not to be impaired. If the fair value is less than the carrying value, then a second step is performed in order to measure the amount of the impairment loss, if any, which is based on comparing the implied fair value of the reporting unit’s goodwill to the fair value of the net assets of the reporting unit.
	Allocated equity plus goodwill and allocated intangible assets are used as a proxy for the carrying amount of each reporting unit. The amount of equity allocated to a reporting unit is based on our cash capital model deployed in managing our businesses, which seeks to approximate the capital a business would require if it were operating independently. Intangible assets are allocated to a reporting unit based on either specifically identifying a particular intangible asset as pertaining to a reporting unit or, if shared among reporting units, based on an assessment of the reporting unit’s benefit from the intangible asset in order to generate results.
	Estimating the fair value of a reporting unit requires management judgment. Estimated fair values for our reporting units were determined using a market valuation method that incorporate price-to-earnings and price-to-book multiples of comparable public companies, as well as discounted cash flow valuation methodologies. In addition, as the fair values determined under the market approach represent a noncontrolling interest, we applied a control premium to arrive at the estimated fair value of each reporting unit on a controlling basis. We engaged an independent valuation specialist to assist us in our valuation process as of August 1, 2014.
	Our annual goodwill impairment testing as of August 1, 2014 did not indicate any goodwill impairment in any of our reporting units. Substantially all of our goodwill is allocated to our Investment Banking, Equities, Fixed Income and Futures reporting units for which the results of our assessment indicated that these reporting units had a fair value substantially in excess of their carrying amounts based on current projections. Goodwill allocated to these reporting units is $1,709.6 million of total goodwill of $1,723.6 million at August 31, 2014. For the remaining less significant reporting units, which contain approximately 0.8% of our total goodwill, we have used a net asset approach for valuation and the fair value of each of the reporting units is equal to its book value.
	Intangible Assets
	The following tables present the gross carrying amount, impairment losses, accumulated amortization, net carrying amount and weighted average amortization period of identifiable intangible assets at August 31, 2014 and November 30, 2013 (in thousands):
			August 31, 2014											Weighted
														average
														remaining
			Gross cost			Impairment			Accumulated			Net carrying		lives (years)
						losses			amortization			amount
	Customer relationships		$	136,956		$	—		$	(24,310	)	$	112,646		14.1
	Trade name			133,203			—			(5,864	)		127,339		33.5
	Exchange and clearing organization membership interests and registrations			14,930			(178	)		—			14,752		N/A
			$	285,089		$	(178	)	$	(30,174	)	$	254,737
			30-Nov-13											Weighted
														average
														remaining
			Gross cost			Impairment			Accumulated			Net carrying		lives (years)
						losses			amortization			amount
	Customer relationships		$	136,740		$	—		$	(17,567	)	$	119,173		14.8
	Trade name			132,967			—			(2,966	)		130,001		34.3
	Exchange and clearing organization membership interests and registrations			15,294			(378	)		—			14,916		N/A
			$	285,001		$	(378	)	$	(20,533	)	$	264,090
	We performed our annual impairment testing of intangible assets with an indefinite useful life, which consists of exchange and clearing organization membership interests and registrations, at August 1, 2014. We elected to perform a quantitative assessment of membership interests and registrations that have available quoted sales prices, and a qualitative assessment of the remainder of our intangible assets. In applying our quantitative assessment, we recognized an impairment loss of $178,000 on certain exchange memberships based on a decline in fair value at August 1, 2014 as observed based on quoted sales prices. With regard to our qualitative assessment of the remaining indefinite-life intangible assets, based on our assessment of market conditions, the utilization of the assets and the replacement costs associated with the assets, we have concluded that it is not more likely than not that the intangible assets are impaired. In applying our quantitative assessment at August 1, 2013 we recognized an impairment loss of $378,000 on certain exchange memberships based on a decline in fair value as observed based on quoted sales prices.
	For intangible assets with a finite life, aggregate amortization expense amounted to $3.2 million and $9.6 million for the three and nine months ended August 31, 2014, respectively, and $6.8 million, $13.6 million and $0.4 million for the three and six months ended August 31, 2013 and the three months ended February 28, 2013, respectively, which is included in Other expenses on the Consolidated Statements of Earnings.
	The estimated future amortization expense for the five succeeding fiscal years are as follows (in thousands):
	Remainder of fiscal 2014		$	3,167
	Year ended November 30, 2015			12,668
	Year ended November 30, 2016			12,668
	Year ended November 30, 2017			12,668
	Year ended November 30, 2018			12,668

ShortTerm_Borrowings

Short-Term Borrowings	9 Months Ended
	Aug. 31, 2014
Debt Disclosure [Abstract]	'
Short-Term Borrowings	'
	Note 12. Short-Term Borrowings
	Short-term borrowings include bank loans that are payable on demand, as well as borrowings under revolving credit facilities which must be repaid within one year or less. Bank loans are typically overnight loans used to finance financial instruments owned or clearing related balances, but are not part of our systemic funding model and generally bear interest at a spread over the federal funds rate. Short-term borrowings at August 31, 2014 and November 30, 2013 were $92.0 million and $12.0 million, respectively. At August 31, 2014, the interest rate on short-term borrowings outstanding is 1.75% per annum. Average daily short-term borrowings outstanding for the three and nine months ended August 31, 2014 were $31.3 million and $87.9 million, respectively, and for the six months ended August 31, 2013 and three months ended February 28, 2013 were $34.0 million and $110.0 million, respectively.

LongTerm_Debt

Long-Term Debt	9 Months Ended
	Aug. 31, 2014
Debt Disclosure [Abstract]	'
Long-Term Debt	'
	Note 13. Long-Term Debt
	In conjunction with pushdown accounting for the Leucadia Transaction, we recorded our long-term debt at its then current fair value of $6.1 billion, which included $536.5 million of excess of the fair value over the total principal amount of our debt at March 1, 2013, in aggregate. The premium is being amortized to interest expense using the effective yield method over the remaining lives of the underlying debt obligations. See Note 4, Leucadia and Related Transactions for further information.
	The following summarizes our long-term debt carrying values (including unamortized discounts and premiums and valuation adjustment, where applicable) at August 31, 2014 and November 30, 2013 (in thousands):
			August 31,		November 30,
			2014		2013
	Unsecured Long-Term Debt
	5.875% Senior Notes, due June 8, 2014 (effective interest rate of 1.51%)		$	—	$	255,676
	3.875% Senior Notes, due November 9, 2015 (effective interest rate of 2.17%)			510,026		516,204
	5.5% Senior Notes, due March 15, 2016 (effective interest rate of 2.52%)			365,739		373,178
	5.125% Senior Notes, due April 13, 2018 (effective interest rate of 3.46%)			845,310		854,011
	8.5% Senior Notes, due July 15, 2019 (effective interest rate of 4.00%)			839,300		858,425
	2.375% Euro Medium Term Notes, due May 20, 2020 (effective rate of 2.42%)			655,129		—
	6.875% Senior Notes, due April 15, 2021 (effective interest rate of 4.40%)			856,575		866,801
	2.25% Euro Medium Term Notes, due July 13, 2022 (effective rate of 4.08%)			4,605		4,792
	5.125% Senior Notes, due January 20, 2023 (effective interest rate of 4.55%)			623,900		625,626
	6.45% Senior Debentures, due June 8, 2027 (effective interest rate of 5.46%)			381,951		383,224
	3.875% Convertible Senior Debentures, due November 1, 2029 (effective interest rate of 3.50%) (1)			350,288		359,281
	6.25% Senior Debentures, due January 15, 2036 (effective interest rate of 6.03%)			513,122		513,343
	6.50% Senior Notes, due January 20, 2043 (effective interest rate of 6.09%)			422,033		422,245
			$	6,367,978	$	6,032,806
	Secured Long-Term Debt
	Credit facility (2)			258,000		200,000
			$	6,625,978	$	6,232,806
	-1	As a result of the transaction with Leucadia on March 1, 2013, the value of the 3.875% Convertible Senior debentures at August 31, 2014 and November 30, 2013, includes the fair value of the conversion feature of $1.4 million and $9.6 million, respectively. The change in fair value of the conversion feature is included within Revenues—Principal transactions in the Consolidated Statement of Earnings and amounted to a gain of $2.4 million and a gain of $8.1 million for the three and nine months ended August 31, 2014, respectively, and a gain of $16.3 million and $9.2 million for the three and six months ended August 31, 2013, respectively.
	-2	On June 26, 2014, we amended and restated the Credit Facility due August 26, 2014 to extend the terms until June 26, 2017.
	On May 20, 2014, under our $2.0 billion Euro Medium Term Note Program we issued senior unsecured notes with a principal amount of €500.0 million, due 2020, which bear interest at 2.375% per annum. Proceeds amounted to €498.7 million. On January 15, 2013, we issued $1.0 billion in senior unsecured long-term debt, comprising 5.125% Senior Notes, due 2023 and 6.5% Senior Notes, due 2043. The 5.125% Senior Notes were issued with a principal amount of $600.0 million and we received proceeds of $595.6 million. The 6.5% Senior Notes were issued with a principal amount of $400.0 million and we received proceeds of $391.7 million.
	Upon completion of the Leucadia Transaction on March 1, 2013, our 3.875% convertible debentures due 2029 (principal amount of $345.0 million) (the “debentures”) remain issued and outstanding but are now convertible into common shares of Leucadia. Other than the conversion into Leucadia common shares, the terms of the debenture remain the same. At September 11, 2014, each $1,000 debenture is currently convertible into 22.1312 shares of Leucadia’s common stock (equivalent to a conversion price of approximately $45.19 per share of Leucadia’s common stock). The debentures are convertible at the holders’ option any time beginning on August 1, 2029 and convertible at any time if: 1) Leucadia’s common stock price is greater than or equal to 130% of the conversion price for at least 20 trading days in a period of 30 consecutive trading days; 2) if the trading price per debenture is less than 95% of the price of the common stock times the conversion ratio for any 10 consecutive trading days; 3) if the debentures are called for redemption; or 4) upon the occurrence of specific corporate actions. The debentures may be redeemed for par, plus accrued interest, on or after November 1, 2012 if the price of Leucadia’s common stock is greater than 130% of the conversion price for at least 20 days in a period of 30 consecutive trading days and we may redeem the debentures for par, plus accrued interest, at our election any time on or after November 1, 2017. Holders may require us to repurchase the debentures for par, plus accrued interest, on November 1, 2017, 2019 and 2024. In addition to ordinary interest, commencing November 1, 2017, contingent interest will accrue at 0.375% if the average trading price of a debenture for 5 trading days ending on and including the third trading day immediately preceding a six-month interest period equals or exceed $1,200 per $1,000 debenture. At March 1, 2013, the conversion option to Leucadia common shares embedded within the debentures meets the definition of a derivative contract, does not qualify to be accounted for within member’s equity and is not clearly and closely related to the economic interest rate or credit risk characteristics of our debt. Accordingly, the conversion option is accounted for on a standalone basis at fair value with changes in fair value recognized in Principal transaction revenues and is presented within Long-term debt on the Consolidated Statement of Financial Condition.
	Secured Long-Term Debt - On August 26, 2011, we entered into a committed senior secured revolving credit facility (“Credit Facility”) with a group of commercial banks in U.S. dollars, Euros and Sterling, for an aggregate committed amount of $950.0 million with availability subject to one or more borrowing bases and of which $250.0 million can be borrowed without a borrowing base requirement. On June 26, 2014, we amended and restated the Credit Facility for three years and reduced the committed amount to $750.0 million. The borrowers under the Credit Facility are Jefferies Bache Financial Services, Inc., Jefferies Bache, LLC and Jefferies Bache Limited, with a guarantee from Jefferies Group LLC. On September 1, 2014, Jefferies Bache, LLC merged with and into Jefferies (a U.S. broker dealer), with Jefferies as the surviving entity, Jefferies is a borrower under the Credit Facility. The Credit Facility contains certain financial covenants, including, but not limited to, restrictions on future indebtedness of our subsidiaries, minimum tangible net worth and liquidity requirements and minimum capital requirements. Interest is based on, in the case of U.S. dollar borrowings, the Federal funds rate or the London Interbank Offered Rate or, in the case of Euro and Sterling borrowings, the Euro Interbank Offered Rate and the London Interbank Offered Rate, respectively. The obligations of each borrower under the Credit Facility are secured by substantially all the assets of such borrower, but none of the borrowers is responsible for any obligations of any other borrower. At August 31, 2014 and November 30, 2013, borrowings under the Credit Facility were denominated in U.S. dollars and we were in compliance with debt covenants under the Credit Facility.

Noncontrolling_Interests_and_M

Noncontrolling Interests and Mandatorily Redeemable Preferred Interests of Consolidated Subsidiaries	9 Months Ended
	Aug. 31, 2014
Noncontrolling Interest [Abstract]	'
Noncontrolling Interests and Mandatorily Redeemable Preferred Interests of Consolidated Subsidiaries	'
	Note 14. Noncontrolling Interests and Mandatorily Redeemable Preferred Interests of Consolidated Subsidiaries
	Noncontrolling Interests
	Noncontrolling interests represent equity interests in consolidated subsidiaries, comprised primarily of asset management entities and investment vehicles set up for the benefit of our employees, that are not attributable, either directly or indirectly, to us (i.e., minority interests). The following table presents noncontrolling interests at August 31, 2014 and November 30, 2013 (in thousands):
			August 31,		November 30,
			2014		2013
	Jefferies Structured Alpha Fund B, LLC (1)		$	—	$	115,958
	Global Equity Event Opportunity Fund, LLC (2)			25,787		—
	Other			5,422		1,196
	Noncontrolling interests		$	31,209	$	117,154
	-1	During the first quarter of 2014, the Jefferies Structured Alpha Fund B. LLC was deconsolidated due to substantive investments in the entity by third parties. No gain or loss was recognized upon deconsolidation. At November 30, 2013, noncontrolling interests included $75.0 million invested by Leucadia.
	-2	At August 31, 2014, all noncontrolling interests are attributed to Leucadia.
	Noncontrolling ownership interests in consolidated subsidiaries are presented in the accompanying Consolidated Statements of Financial Condition within Equity as a component separate from Member’s equity. Net Earnings in the accompanying Consolidated Statements of Earnings includes earnings attributable to both our equity investor and the noncontrolling interests.
	Mandatorily Redeemable Preferred Interests of Consolidated Subsidiaries
	Interests in consolidated subsidiaries that meet the definition of mandatorily redeemable financial instruments require liability classification and remeasurement at the estimated amount of cash that would be due and payable to settle such interests under the applicable entity’s organization agreement. Changes to mandatorily redeemable financial instruments are reflected as Interest on mandatorily redeemable preferred interests of consolidated subsidiaries within Net revenues in our Consolidated Statements of Earnings.
	On April 1, 2013, mandatorily redeemable financial instruments, representing Leucadia’s member’s equity interests in Jefferies High Yield Holdings, LLC (“JHYH”), were redeemed and subsequently contributed back to us by Leucadia as additional equity in Jefferies Group LLC. Prior to redemption, the mandatorily redeemable financial instruments represented equity interests in JHYH.

Benefit_Plans

Benefit Plans	9 Months Ended
	Aug. 31, 2014
Compensation and Retirement Disclosure [Abstract]	'
Benefit Plans	'
	Note 15. Benefit Plans
	U.S. Pension Plan
	We maintain a defined benefit pension plan, Jefferies Group LLC Employees’ Pension Plan (the “U.S. Pension Plan”), which is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended, and covers certain of our employees. Under the U.S. Pension Plan, benefits to participants are based on years of service and the employee’s career average pay. Effective December 31, 2005, benefits under the U.S. Pension Plan were frozen with no further benefit accruing to participants for future service after December 31, 2005.
	German Pension Plan
	In connection with the acquisition of Jefferies Bache from Prudential on July 1, 2011, we acquired a defined benefits pension plan located in Germany (the “German Pension Plan”) for the benefit of eligible employees of Jefferies Bache in that territory. The German Pension Plan has no plan assets and is therefore unfunded. We have purchased insurance contracts from multi-national insurers held in the name of Jefferies Bache Limited to provide for the plan’s future obligations. The investment in these insurance contracts are included in Financial Instruments owned – Investments at fair value in the Consolidated Statements of Financial Condition and has a fair value of $18.2 million and $19.7 million at August 31, 2014 and November 30, 2013, respectively. We expect to pay our pension obligations from the cash flows available to us under the insurance contracts. All costs relating to the plan (including insurance premiums and other costs as computed by the insurers) are paid by us. In connection with the acquisition, it was agreed with Prudential that any insurance premiums and funding obligations related to pre-acquisition date service will be reimbursed to us by Prudential.
	The components of net periodic pension (benefit)/cost for our pension plans are as follows (in thousands):
		Successor												Predecessor
	U.S. Pension Plan	Three Months			Nine Months			Three Months			Six Months			Three Months
		Ended			Ended			Ended			Ended			Ended
		August 31,			August 31,			August 31,			August 31,			February 28,
		2014			2014			2013			2013			2013
	Components of net periodic pension (income) cost:
	Service cost	$	56		$	168		$	56		$	112		$	56
	Interest cost on projected benefit obligation		607			1,821			557			1,114			529
	Expected return on plan assets		(789	)		(2,367	)		(680	)		(1,360	)		(665	)
	Net amortization		(36	)		(108	)		—			—			300
	Net periodic pension (income)/cost	$	(162	)	$	(486	)	$	(67	)	$	(134	)	$	220
		Successor												Predecessor
	German Pension Plan	Three Months			Nine Months			Three Months			Six Months			Three Months
		Ended			Ended			Ended			Ended			Ended
		August 31,			August 31,			August 31,			August 31,			February 28,
		2014			2014			2013			2013			2013
	Components of net periodic pension cost:
	Service cost	$	11		$	33		$	16		$	32		$	16
	Interest cost on projected benefit obligation		216			658			220			433			220
	Net amortization		61			186			45			89			45
	Net periodic pension cost	$	288		$	877		$	281		$	554		$	281
	Employer Contributions – Our funding policy is to contribute to the plans at least the minimum amount required for funding purposes under applicable employee benefit and tax laws. We did not contribute to the U.S. Pension Plan during the nine months ended August 31, 2014 and we do not expect to make any contributions to the plan during the remainder of the 2014 fiscal year. We did not contribute to the German Pension Plan during the nine months ended August 31, 2014 and do not expect to make any contributions to the German Pension Plan for the remainder of the fiscal year.

Compensation_Plans

Compensation Plans	9 Months Ended
	Aug. 31, 2014
Compensation Related Costs [Abstract]	'
Compensation Plans	'
	Note 16. Compensation Plans
	Prior to the Leucadia Transaction, we sponsored the following share-based compensation plans: incentive compensation plan, employee stock purchase plan and the deferred compensation plan. Subsequently, sponsorship of share-based compensation plans was transferred to Leucadia, with outstanding share-based awards relating to Leucadia common shares and future awards to relate to Leucadia common shares. The fair value of share-based awards is estimated on the date of grant based on the market price of the underlying common stock less the impact of selling restrictions subsequent to vesting, if any, and is amortized as compensation expense over the related requisite service periods. We are allocated costs associated with awards granted to our employees under such plans.
	In addition, we sponsor non-share-based compensation plans. Non-share-based compensation plans sponsored by us include a profit sharing plan and other forms of restricted cash awards.
	The following are descriptions of the compensation plans and the activity of such plans for the three and nine months ended August 31, 2014, the three and six months ended August 31, 2013 and the three months ended February 28, 2013.
	Incentive Compensation Plan. The Incentive Compensation Plan (“Incentive Plan”) allows for awards in the form of incentive stock options (within the meaning of Section 422 of the Internal Revenue Code), nonqualified stock options, stock appreciation rights, restricted stock, unrestricted stock, performance awards, restricted stock units, dividend equivalents or other share-based awards. Restricted stock units (“RSUs”) give a participant the right to receive fully vested common shares at the end of a specified deferral period, allowing a participant to hold an interest tied to common stock on a tax deferred basis. Prior to settlement, RSUs carry no voting or dividend rights associated with the stock ownership, but dividend equivalents are accrued to the extent there are dividends declared on the underlying common shares as cash amounts or as deemed reinvestments in additional RSUs. In connection with the Leucadia Transaction, the Incentive Plan was amended to provide for awards to be issued relating to shares of Leucadia, our parent company at March 1, 2013. Share-based awards outstanding at March 1, 2013 were converted into awards for shares of Leucadia at the Exchange Ratio, with all such awards subject to the same terms and conditions that previously existed (except for the elimination of fractional shares).
	Restricted stock and RSUs may be granted to new employees as “sign-on” awards, to existing employees as “retention” awards and to certain executive officers as awards for multiple years. Sign-on and retention awards are generally subject to annual ratable vesting over a four-year service period and are amortized as compensation expense on a straight line basis over the related four years. Restricted stock and RSUs are granted to certain senior executives with both performance and service conditions. These awards granted to senior executives are amortized over the service period as we have determined that it is probable that the performance condition will be achieved.
	The total compensation cost associated with restricted stock and RSUs amounted to $18.0 million and $68.0 million for the three and nine months ended August 31, 2014, respectively, and $20.7 million, $44.1 million for the three and six months ended August 31, 2013, respectively, and $22.3 for the three months ended February 28, 2013. Total compensation cost includes the amortization of sign-on, retention and senior executive awards, less forfeitures and clawbacks.
	The fair values of outstanding restricted stock and RSUs with future service requirements were remeasured as part of the acquisition accounting, resulting in an increase of approximately $45.1 million to the unrecognized compensation cost allocated to us at March 1, 2013. At August 31, 2014, we had $112.8 million of total unrecognized compensation cost allocated to us related to nonvested share-based awards, which is expected to be recognized over a remaining weighted average vesting period of approximately 2.1 years.
	Employee Stock Purchase Plan. There is also an Employee Stock Purchase Plan (“ESPP”) which we consider noncompensatory effective January 1, 2007. The ESPP permits all regular full-time employees and employees who work part time over 20 hours per week to purchase, at a discount, Leucadia common shares (since the Leucadia Transaction) and permitted purchase of Jefferies Group, Inc. common stock (prior to the Leucadia Transaction). Annual employee contributions are limited to $21,250, are voluntary and made through payroll deduction. The stock purchase price is equal to 95% of the closing price of common stock on the last day of the applicable session (monthly).
	Deferred Compensation Plan. There is also a Deferred Compensation Plan, which was established in 2001. Eligible employees are able to defer compensation on a pre-tax basis, with deferred amounts deemed invested at a discount in Leucadia common shares and, prior to the Leucadia Transaction, in Jefferies Group, Inc. common stock (“DCP shares”), or by allocating among any combination of other investment funds available under the Deferred Compensation Plan. In connection with the transaction with Leucadia on March 1, 2013, the Deferred Compensation Plan was amended and deferrals denominated as DCP shares became settleable by delivery of Leucadia common shares. We often invest directly, as a principal, in investments corresponding to the other investment funds, relating to our obligations to perform under the Deferred Compensation Plan. The compensation deferred by our employees is expensed in the period earned. The change in fair value of our investments in assets corresponding to the specified other investment funds are recognized in Principal transactions and changes in the corresponding deferral compensation liability are reflected as Compensation and benefits expense in our Consolidated Statements of Earnings. Additionally, we recognize compensation cost related to the discount provided to employees in electing to defer compensation in DCP shares.
	Profit Sharing Plan. We have a profit sharing plan, covering substantially all employees, which includes a salary reduction feature designed to qualify under Section 401(k) of the Internal Revenue Code. The compensation cost related to this plan was $1.2 million and $6.0 million for the three and nine months ended August 31, 2014, respectively, and $1.3 million and $3.0 million for the three and six months ended August 31, 2013, respectively, and $2.6 million for the three months ended February 28, 2013.
	Restricted Cash Awards. We provide compensation to new and existing employees in the form of loans and/or other cash awards which are subject to ratable vesting terms with service requirements ranging from one to eight years, with an approximate average term of three years. We amortize these awards to compensation expense over the relevant service period. The compensation cost associated with these awards amounted to $37.4 million and $115.6 million for the three and nine months ended August 31, 2014, respectively, and to $45.5 million and $92.5 million for the three and six months ended August 31, 2013, respectively, and $48.2 million for the three months ended February 28, 2013. At August 31, 2014 and November 30, 2013, the remaining unamortized amount of these awards was $249.4 million and $185.0 million, respectively, and is included within Other assets on the Consolidated Statements of Financial Condition.

Earnings_per_Share

Earnings per Share	9 Months Ended
	Aug. 31, 2014
Earnings Per Share [Abstract]	'
Earnings per Share	'
	Note 17. Earnings per Share
	Earnings per share data is not provided for periods subsequent to March 1, 2013, the date we became a limited liability company and wholly-owned subsidiary of Leucadia. The following is a reconciliation of the numerators and denominators of the Basic and Diluted earnings per common share computations for the three months ended February 28, 2013 (in thousands, except per share amounts):
			Predecessor
			Three Months Ended
			February 28, 2013
	Earnings for basic earnings per common share:
	Net earnings		$	90,842
	Net earnings to noncontrolling interests			10,704
	Net earnings to common shareholders			80,138
	Less: Allocation of earnings to participating securities (1)			5,890
	Net earnings available to common shareholders		$	74,248
	Earnings for diluted earnings per common share:
	Net earnings		$	90,842
	Net earnings to noncontrolling interests			10,704
	Net earnings to common shareholders			80,138
	Add: Mandatorily redeemable convertible preferred stock dividends			1,016
	Less: Allocation of earnings to participating securities (1)			5,882
	Net earnings available to common shareholders		$	75,272
	Shares:
	Average common shares used in basic computation			213,732
	Stock options			2
	Mandatorily redeemable convertible preferred stock			4,110
	Convertible debt			—
	Average common shares used in diluted computation			217,844
	Earnings per common share:
	Basic		$	0.35
	Diluted		$	0.35
	-1	Represents dividends declared during the period on participating securities plus an allocation of undistributed earnings to participating securities. Net losses are not allocated to participating securities. Participating securities represent restricted stock and restricted stock units for which requisite service has not yet been rendered and amounted to weighted average shares of 16,756,000 for the three months ended February 28, 2013. Dividends declared on participating securities during the three months ended February 28, 2013 amounted to approximately $1.3 million. Undistributed earnings are allocated to participating securities based upon their right to share in earnings if all earnings for the period had been distributed.
	Our ability to pay distributions to Leucadia is subject to the restrictions set forth in certain financial covenants associated with the Credit Facility as described in Note 13, Long-Term Debt and the governing provisions of the Delaware Limited Liability Company Act.
	A $0.075 dividends per share of common stock was declared during the three months ended February 28, 2013.

Income_Taxes

Income Taxes	9 Months Ended
	Aug. 31, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Note 18. Income Taxes
	At August 31, 2014 and November 30, 2013, we had approximately $134.1 million and $126.8 million respectively, of total gross unrecognized tax benefits. The total amount of unrecognized benefit that, if recognized, would favorably affect the effective tax rate was $89.3 million and $85.5 million at August 31, 2014 and November 30, 2013, respectively.
	We recognize interest accrued related to unrecognized tax benefits in Interest expense. Penalties, if any, are recognized in Other expenses in the Consolidated Statements of Earnings. At August 31, 2014 and November 30, 2013, we had interest accrued of approximately $28.4 million and $22.9 million, respectively, included in Accrued expenses and other liabilities. No material penalties were accrued for the nine months ended August 31, 2014 and year ended November 30, 2013.
	We are currently under examination by the Internal Revenue Service and other major tax jurisdictions. We do not expect that resolution of these examinations will have a material effect on our consolidated financial position, but could have a material impact on the consolidated results of operations for the period in which resolution occurs.
	The table below summarizes the earliest tax years that remain subject to examination in the major tax jurisdictions in which we operate:
	Jurisdiction	Tax Year
	United States		2006
	United Kingdom		2012
	California		2006
	Connecticut		2006
	Massachusetts		2010
	New Jersey		2007
	New York State		2001
	New York City		2003

Commitments_Contingencies_and_

Commitments, Contingencies and Guarantees	9 Months Ended
	Aug. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments, Contingencies and Guarantees	'
	Note 19. Commitments, Contingencies and Guarantees
	Commitments
	The following table summarizes our commitments associated with our capital market and asset management business activities at August 31, 2014 (in millions):
			Expected Maturity Date
			2014		2015		2016		2018		2020		Maximum
							and		and		and		Payout
							2017		2019		Later
	Equity commitments (1)		$	1.6	$	7.6	$	0.9	$	—	$	355.7	$	365.8
	Loan commitments (1)			—		76.7		615.8		101.1		—		793.6
	Mortgage-related commitments			976.2		333		530.6		—		—		1,839.80
	Forward starting reverse repos and repos			1,975.30		—		—		—		—		1,975.30
	Other unfunded commitments (1)			—		79.5		—		—		23		102.5
			$	2,953.10	$	496.8	$	1,147.30	$	101.1	$	378.7	$	5,077.00
	-1	Equity, loan commitments and other unfunded commitments are presented by contractual maturity date. The amounts are however available on demand.
	The table below presents our credit exposure from our loan commitments, including funded amounts, summarized by period of expiration at August 31, 2014. Credit exposure is based on the external credit ratings of the underlyings or referenced assets of our loan commitments. Since commitments associated with these business activities may expire unused, they do not necessarily reflect the actual future cash funding requirements (in millions):
	Credit Ratings		2014		2015-2019		2020 and		Total		Corporate		Corporate
							Later		Corporate		Lending		Lending
									Lending		Exposure at Fair		Commitments (3)
									Exposure (1)		Value (2)
	Investment grade		$	—	$	55.2	$	—	$	55.2	$	—	$	55.2
	Non-investment grade.			—		88.8		—		88.8		15.6		73.2
	Unrated			1.5		830.4		—		831.9		166.7		665.2
	Total		$	1.5	$	974.4	$	—	$	975.9	$	182.3	$	793.6
	-1	Total corporate lending exposure represents the potential loss assuming the fair value of funded loans and lending commitments were zero.
	-2	The corporate lending exposure at fair value includes $196.9 million of funded loans included in Financial instruments owned—Loans and Loans to and investments in related parties, and a $14.6 million net liability related to lending commitments recorded in Financial instruments sold—Derivatives and Financial instruments owned—Derivatives in the Consolidated Statement of Financial Condition at August 31, 2014.
	-3	Represents the notional amount of unfunded lending commitments.
	Equity Commitments. Includes commitments to invest in our joint ventures, Jefferies Finance and Jefferies LoanCore, and commitments to invest in private equity funds and in Jefferies Capital Partners, LLC, the manager of the private equity funds, which consists of a team led by Brian Friedman, one of our directors and Chairman of the Executive Committee. At August 31, 2014, our outstanding commitments relating to Jefferies Capital Partners, LLC and its private equity funds was $30.5 million.
	See Note 10, Investments for additional information regarding our investments in Jefferies Finance and Jefferies LoanCore.
	Additionally, At August 31, 2014, we had other outstanding equity commitments to invest up to $1.8 million in various other investments.
	Loan Commitments. From time to time we make commitments to extend credit to investment banking and other clients in loan syndication, acquisition finance and securities transactions and to SPE sponsors in connection with the funding of CLO and other asset-backed transactions. These commitments and any related drawdowns of these facilities typically have fixed maturity dates and are contingent on certain representations, warranties and contractual conditions applicable to the borrower. At August 31, 2014, we had $443.6 million of outstanding loan commitments to clients.
	Loan commitments outstanding at August 31, 2014, also include our portion of the outstanding secured revolving credit facility provided to Jefferies Finance, to support loan underwritings by Jefferies Finance.
	Mortgage-Related Commitments. We enter into forward contracts to purchase mortgage participation certificates and mortgage-backed securities. The mortgage participation certificates evidence interests in mortgage loans insured by the Federal Housing Administration and the mortgage-backed securities are insured or guaranteed by the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac) or the Government National Mortgage Association (Ginnie Mae). We frequently securitize the mortgage participation certificates and mortgage-backed securities. The fair value of mortgage-related commitments recorded in the Consolidated Statements of Financial Condition was $69.7 million at August 31, 2014.
	Underwriting Commitments. In connection with investment banking activities, we may from time to time provide underwriting commitments to our clients in connection with capital raising transactions.
	Forward Starting Reverse Repos and Repos. We enter into commitments to take possession of securities with agreements to resell on a forward starting basis and to sell securities with agreements to repurchase on a forward starting basis that are primarily secured by U.S. government and agency securities.
	Other Unfunded Commitments. Other unfunded commitments include obligations in the form of revolving notes to provide financing to asset-backed and CLO vehicles. Upon advancing funds, drawn amounts are collateralized by the assets of an entity.
	Contingencies
	Seven putative class action lawsuits have been filed in New York and Delaware concerning the Leucadia Transaction. The class actions, filed on behalf of our shareholders prior to the Leucadia Transaction, name as defendants Jefferies Group, Inc., the members of the board of directors of Jefferies Group, Inc., Leucadia and, in certain of the actions, certain subsidiaries. The actions allege that the directors breached their fiduciary duties in connection with the Leucadia Transaction by engaging in a flawed process and agreeing to sell Jefferies Group, Inc. for inadequate consideration pursuant to an agreement that contains improper deal protection terms. The actions allege that Jefferies Group, Inc. and Leucadia aided and abetted the directors’ breach of fiduciary duties. The actions filed in New York have been stayed, the actions filed in Delaware are proceeding and the claims against certain of the directors have been dismissed. We are unable to predict the outcome of this litigation or to estimate the amount of or range of any reasonably possible loss.
	During the first quarter of 2014, Jefferies reached a non-prosecution agreement with the United States Attorney for the District of Connecticut and a settlement agreement with the Securities and Exchange Commission (“SEC”), relating to an investigation of purchases and sales of mortgage-backed securities. That investigation arose from a matter that came to light in late 2011, at which time the Company terminated a mortgage-backed-securities trader who was then indicted by the United States Attorney for the District of Connecticut in January 2013 and separately charged in a civil complaint by the SEC. Those agreements include an aggregate $25.0 million in payments, of which approximately $11.0 million are payments to trading counterparties impacted by those activities, approximately $10.0 million of which is a fine payable to the U.S. Attorney’s Office, and approximately $4.0 million of which is a fine payable to the SEC. At August 31, 2014, the outstanding reserve with respect to remaining payments to be made under the agreements is approximately $3.1 million.
	Guarantees
	Derivative Contracts. As a dealer, we make markets and trade in a variety of derivative instruments. Certain derivative contracts that we have entered into meet the accounting definition of a guarantee under U.S. GAAP, including credit default swaps, written foreign currency options and written equity put options. On certain of these contracts, such as written interest rate caps and foreign currency options, the maximum payout cannot be quantified since the increase in interest or foreign exchange rates are not contractually limited by the terms of the contract. As such, we have disclosed notional values as a measure of our maximum potential payout under these contracts.
	The following table summarizes the notional amounts associated with our derivative contracts meeting the definition of a guarantee under U.S. GAAP at August 31, 2014 (in millions):
			Expected Maturity Date
	Guarantee Type:		2014		2015		2016		2018		2020		Notional/
							and		and		and Later		Maximum
							2017		2019				Payout
	Derivative contracts—non-credit related		$	55,067.00	$	12,274.70	$	349.4	$	1.1	$	521.5	$	68,213.70
	Written derivative contracts—credit related			—		—		9		—		1,541.50		1,550.50
	Total derivative contracts		$	55,067.00	$	12,274.70	$	358.4	$	1.1	$	2,063.00	$	69,764.20
	At August 31, 2014 the external credit ratings of the underlyings or referenced assets for our credit related derivatives contracts (in millions):
			External Credit Rating
			AAA/		AA/Aa		A		BBB/		Below		Unrated		Notional/
			Aaa						Baa		Investment				Maximum
											Grade				Payout
	Credit related derivative contracts:
	Index credit default swaps		$	1,475.50	$	—	$	—	$	—	$	—	$	—	$	1,475.50
	Single name credit default swaps		$	—	$	—	$	10	$	52	$	13	$	—	$	75
	The derivative contracts deemed to meet the definition of a guarantee under U.S. GAAP are before consideration of hedging transactions and only reflect a partial or “one-sided” component of any risk exposure. Written equity options and written credit default swaps are often executed in a strategy that is in tandem with long cash instruments (e.g., equity and debt securities). We substantially mitigate our exposure to market risk on these contracts through hedges, such as other derivative contracts and/or cash instruments, and we manage the risk associated with these contracts in the context of our overall risk management framework. We believe notional amounts overstate our expected payout and that fair value of these contracts is a more relevant measure of our obligations. At August 31, 2014, the fair value of derivative contracts meeting the definition of a guarantee is approximately $65.3 million.
	Loan Guarantee. We have provided a guarantee to Jefferies Finance, whereby we are required to make certain payments to a SPE sponsored by Jefferies Finance in the event that Jefferies Finance is unable to meet its obligations to the SPE. At August 31, 2014, the maximum amount payable under the guarantee is $21.0 million and matures in January 2021.
	Stand by Letters of Credit. At August 31, 2014, we provided guarantees to certain counterparties in the form of standby letters of credit in the amount of $37.9 million, which expire within one year. Stand by letters of credit commit us to make payment to the beneficiary if the guaranteed party fails to fulfill its obligation under a contractual arrangement with that beneficiary. Since commitments associated with these collateral instruments may expire unused, the amount shown does not necessarily reflect the actual future cash funding requirement.
	Other Guarantees. We are members of various exchanges and clearing houses. In the normal course of business we provide guarantees to securities clearinghouses and exchanges. These guarantees generally are required under the standard membership agreements, such that members are required to guarantee the performance of other members. Additionally, if a member becomes unable to satisfy its obligations to the clearinghouse, other members would be required to meet these shortfalls. To mitigate these performance risks, the exchanges and clearinghouses often require members to post collateral. Our obligations under such guarantees could exceed the collateral amounts posted. Our maximum potential liability under these arrangements cannot be quantified; however, the potential for us to be required to make payments under such guarantees is deemed remote. Accordingly no liability has been recognized for these arrangements.

Net_Capital_Requirements

Net Capital Requirements	9 Months Ended
	Aug. 31, 2014
Text Block [Abstract]	'
Net Capital Requirements	'
	Note 20. Net Capital Requirements
	As broker-dealers registered with the SEC and member firms of the Financial Industry Regulatory Authority (“FINRA”), Jefferies and Jefferies Execution are subject to the SEC Uniform Net Capital Rule (“Rule 15c3-1”), which requires the maintenance of minimum net capital and, have elected to calculate minimum capital requirements under the alternative method permitted by Rule 15c3-1 in calculating net capital. Additionally, Jefferies Bache, LLC is registered as a Futures Commission Merchant and is subject to Rule 1.17 of the Commodities Futures Trading Commission (“CFTC”). Our designated self-regulatory organization is FINRA for our U.S. broker-dealers and the Chicago Mercantile Exchange for Jefferies Bache, LLC.
	At August 31, 2014, Jefferies, Jefferies Execution and Jefferies Bache, LLC’s net capital, adjusted net capital, and excess net capital were as follows (in thousands):
		Net Capital		Excess Net Capital
	Jefferies	$	902,855	$	829,380
	Jefferies Execution		5,737		5,487
		Adjusted Net Capital		Excess Net Capital
	Jefferies Bache, LLC	$	187,645	$	84,003
	On September 1, 2014, Jefferies Bache, LLC merged with and into Jefferies (a U.S. broker-dealer), with Jefferies as the surviving entity, registering as a FCM. The minimum net capital requirement in determining excess net capital for a dually-registered U.S. broker-dealer and FCM is equal to the greater of the requirement under Rule 15c3-1 or CFTC Rule 1.17. Jefferies’ minimum net capital requirement would have increased from approximately $73.0 million to $103.0 million had the merger occurred on August 31, 2014.
	Certain other U.S. and non-U.S. subsidiaries are subject to capital adequacy requirements as prescribed by the regulatory authorities in their respective jurisdictions, including Jefferies International Limited and Jefferies Bache Limited which are subject to the regulatory supervision and requirements of the Financial Conduct Authority in the United Kingdom (“U.K.”).
	The regulatory capital requirements referred to above may restrict our ability to withdraw capital from our regulated subsidiaries.

Segment_Reporting

Segment Reporting	9 Months Ended
	Aug. 31, 2014
Segment Reporting [Abstract]	'
Segment Reporting	'
	Note 21. Segment Reporting
	We operate in two principal segments – Capital Markets and Asset Management. The Capital Markets segment includes our securities, commodities, futures and foreign exchange brokerage trading activities and investment banking, which is comprised of underwriting and financial advisory activities. The Capital Markets reportable segment provides the sales, trading, origination and advisory effort for various fixed income, equity and advisory products and services. The Asset Management segment provides investment management services to investors in the U.S. and overseas.
	Our reportable business segment information is prepared using the following methodologies:
		•		Net revenues and expenses directly associated with each reportable business segment are included in determining earnings before taxes.
		•		Net revenues and expenses not directly associated with specific reportable business segments are allocated based on the most relevant measures applicable, including each reportable business segment’s net revenues, headcount and other factors.
		•		Reportable business segment assets include an allocation of indirect corporate assets that have been fully allocated to our reportable business segments, generally based on each reportable business segment’s capital utilization.
	Our net revenues and expenses by segment are summarized below (in millions):
			Successor								Predecessor
			Three Months Ended		Nine Months Ended		Three Months Ended		Six Months Ended		Three Months Ended
			August 31, 2014		August 31, 2014		August 31, 2013		August 31, 2013		February 28, 2013
	Capital Markets:
	Net revenues		$	828.5	$	2,423.20	$	515.3	$	1,149.90	$	807.6
	Expenses		$	697.8	$	2,020.60	$	500.1	$	1,077.50	$	660.6
	Asset Management:
	Net revenues		$	14.8	$	42.1	$	16.4	$	40.2	$	10.9
	Expenses		$	9.9	$	27.7	$	8.2	$	20.6	$	7.5
	Total:
	Net revenues		$	843.3	$	2,465.30	$	531.7	$	1,190.10	$	818.5
	Expenses		$	707.7	$	2,048.30	$	508.3	$	1,098.10	$	668.1
	The following table summarizes our total assets by segment at August 31, 2014 and November 30, 2013 (in millions):
			August 31, 2014		November 30, 2013
	Segment assets:
	Capital Markets		$	44,208.20	$	39,276.80
	Asset Management			555.9		900.2
	Total assets			44,764.10		40,177.00
	Net Revenues by Geographic Region
	Net revenues for the Capital Market segment are recorded in the geographic region in which the position was risk-managed or, in the case of investment banking, in which the senior coverage banker is located. For Asset Management, net revenues are allocated according to the location of the investment advisor. Net revenues by geographic region were as follows (in thousands):
											Predecessor
			Three Months Ended		Nine Months Ended		Three Months Ended		Six Months Ended		Three Months Ended
			August 31, 2014		August 31, 2014		August 31, 2013		August 31, 2013		February 28, 2013
	Americas (1)		$	661,738	$	1,893,723	$	362,240	$	884,386	$	663,588
	Europe (2)			153,455		500,229		159,739		276,782		133,104
	Asia			28,116		71,377		9,716		28,965		21,852
	Net revenues		$	843,309	$	2,465,329	$	531,695	$	1,190,133	$	818,544
	-1	Substantially all relates to U.S. results.
	-2	Substantially all relates to U.K. results.

Related_Party_Transactions

Related Party Transactions

9 Months Ended

Aug. 31, 2014

Related Party Transactions [Abstract]

'

Related Party Transactions

'

Note 22. Related Party Transactions

Jefferies Capital Partners and JEP IV Related Funds. We have loans to and/or equity investments in private equity funds and in Jefferies Capital Partners, LLC, the manager of the Jefferies Capital Partners funds, which are managed by a team led by Brian P. Friedman, one of our directors and our Chairman of the Executive Committee (“Private Equity Related Funds”). At August 31, 2014 and November 30, 2013, loans to and/or equity investments in Private Equity Related Funds were in aggregate $65.3 million and $61.7 million, respectively. The following table presents interest income earned on loans to Private Equity Related Funds and other revenues and investment income related to net gains and losses on our investment in Private Equity Related Funds (in thousands):

Successor

Predecessor

Three Months Ended

Nine Months Ended

Three Months Ended

Six Months Ended

Three Months Ended

August 31, 2014

August 31, 2014

August 31, 2013

August 31, 2013

February 28, 2013

Interest income

$

—

$

—

$

339

$

837

$

516

Other revenues and investment (loss) income

371

(11,088

)

4,005

3,031

947

For further information regarding our commitments and funded amounts to Private Equity Related Funds, see Note 19, Commitments, Contingencies and Guarantees.

Berkadia Commercial Mortgage, LLC. At August 31, 2014 and November 30, 2013, we have commitments to purchase $313.7 million and $300.0 million, respectively, in agency commercial mortgage-backed securities from Berkadia Commercial Mortgage, LLC, which is partially owned by Leucadia.

Harbinger Group Inc. At August 31, 2014, we have a loan outstanding of $8.8 million to a party related to Harbinger Group, Inc., which is partially owned by Leucadia. Interest income on such loan for the three months ended August 31, 2014 was $0.2 million. In addition, as part of our loan secondary trading activities we have unsettled purchases and sales of loans pertaining to portfolio companies within funds managed by Harbinger of $223.6 million.

National Beef Packaging Company, LLC (“National Beef”). We act as a futures clearing merchant for National Beef, which is partially owned by Leucadia. At August 31, 2014, we had a customer payable to National Beef of $4.1 million and recognized commissions of $65,000 during the three and nine months ended August 31, 2014.

Officers, Directors and Employees. At August 31, 2014 and November 30, 2013, we had $14.2 million and $13.9 million, respectively, of loans outstanding to certain of our employees (none of whom are executive officers or directors) that are included in Other assets on the Consolidated Statements of Financial Condition.

Leucadia. Under a service agreement, we charge Leucadia for certain services which, for the three and nine months ended August 31, 2014 amounted to $9.0 million and $26.2 million, respectively. At August 31, 2014 and November 30, 2013, we had a receivable from Leucadia of $11.3 million and $2.3 million, respectively, which is included within Other assets on the Consolidated Statements of Financial Condition. At August 31, 2014 and November 30, 2013, we had a payable to Leucadia of $23.3 million and $6.7 million respectively, which is included within Other liabilities on the Consolidated Statements of Financial Condition.

On March 18, 2014, we sold our investment in Harbinger Group Inc., consisting of approximately 18.6 million shares, to Leucadia at the closing price on that date. In addition, on February 28, 2014, we sold our ownership interest in CoreCommodity Capital, LLC (formerly CoreCommodity Management, LLC, our commodity asset management business) to Leucadia at a fair value. During the six months ended August 31, 2013 and the three months ended February 28, 2013, we distributed $65,000, and $61,000 to Leucadia in respect of Leucadia’s remaining investment in our high yield joint venture.

See Note 4, Leucadia and Related Transactions for information regarding the transaction on March 1, 2013 and Note 14, Noncontrolling Interests and Mandatorily Redeemable Preferred Interests of Consolidated Subsidiaries regarding other investments by Leucadia.

For information on transactions with our equity method investees, see Note 10, Investments.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Aug. 31, 2014
Accounting Policies [Abstract]	'
Revenue Recognition Policies	'
	Revenue Recognition Policies
	Commissions. All customer securities transactions are reported on the Consolidated Statements of Financial Condition on a settlement date basis with related income reported on a trade-date basis. We permit institutional customers to allocate a portion of their gross commissions to pay for research products and other services provided by third parties. The amounts allocated for those purposes are commonly referred to as soft dollar arrangements. These arrangements are accounted for on an accrual basis and, as we are not the primary obligor for these arrangements, netted against commission revenues in the Consolidated Statements of Earnings. The commissions and related expenses on client transactions executed by Jefferies Bache, LLC, a futures commission merchant, are recorded on a half-turn basis.
	Principal Transactions. Financial instruments owned and Financial instruments sold, but not yet purchased (all of which are recorded on a trade-date basis) are carried at fair value with gains and losses reflected in Principal transactions in the Consolidated Statements of Earnings on a trade date basis. Fees received on loans carried at fair value are also recorded within Principal transactions.
	Investment Banking. Underwriting revenues and fees from mergers and acquisitions, restructuring and other investment banking advisory assignments or engagements are recorded when the services related to the underlying transactions are completed under the terms of the assignment or engagement. Expenses associated with such assignments are deferred until reimbursed by the client, the related revenue is recognized or the engagement is otherwise concluded. Expenses are recorded net of client reimbursements and netted against revenues. Unreimbursed expenses with no related revenues are included in Business development and Professional services expenses in the Consolidated Statements of Earnings.
	Asset Management Fees and Investment Income From Managed Funds. Asset management fees and investment income from managed funds include revenues we earn from management, administrative and performance fees from funds and accounts managed by us, revenues from management and performance fees we earn from related-party managed funds and investment income from our investments in these funds. We earn fees in connection with management and investment advisory services performed for various funds and managed accounts. These fees are based on assets under management or an agreed upon notional amount and may include performance fees based upon the performance of the funds. Management and administrative fees are generally recognized over the period that the related service is provided. Generally, performance fees are earned when the return on assets under management exceeds certain benchmark returns, “high-water marks” or other performance targets. Performance fees are accrued (or reversed) on a monthly basis based on measuring performance to date versus any relevant benchmark return hurdles stated in the investment management agreement. Performance fees are not subject to adjustment once the measurement period ends (generally annual periods) and the performance fees have been realized.
	Interest Revenue and Expense. We recognize contractual interest on Financial instruments owned and Financial instruments sold, but not yet purchased, on an accrual basis as a component of interest revenue and expense. Interest flows on derivative trading transactions and dividends are included as part of the fair valuation of these contracts and recognized in Principal transactions in the Consolidated Statements of Earnings rather than as a component of interest revenue or expense. We account for our short- and long-term borrowings on an accrual basis with related interest recorded as Interest expense. Discounts/premiums arising on our long-term debt are accreted/amortized to Interest expense using the effective yield method over the remaining lives of the underlying debt obligations. In addition, we recognize interest revenue related to our securities borrowed and securities purchased under agreements to resell activities and interest expense related to our securities loaned and securities sold under agreements to repurchase activities on an accrual basis.
Cash Equivalents	'
	Cash Equivalents
	Cash equivalents include highly liquid investments, including certificates of deposit and money market funds, not held for resale with original maturities of three months or less.
Cash and Securities Segregated and on Deposit for Regulatory Purposes or Deposited With Clearing and Depository Organizations	'
	Cash and Securities Segregated and on Deposit for Regulatory Purposes or Deposited With Clearing and Depository Organizations
	In accordance with Rule 15c3-3 of the Securities Exchange Act of 1934, Jefferies as a broker-dealer carrying client accounts, is subject to requirements related to maintaining cash or qualified securities in a segregated reserve account for the exclusive benefit of its clients. In addition, certain financial instruments used for initial and variation margin purposes with clearing and depository organizations are recorded in this caption. Jefferies Bache, LLC, as a futures commission merchant, is obligated by rules mandated by the Commodities Futures Trading Commission under the Commodities Exchange Act, to segregate or set aside cash or qualified securities to satisfy such regulations, which regulations have been promulgated to protect customer assets. Certain other entities are also obligated by rules mandated by their primary regulators to segregate or set aside cash or equivalent securities to satisfy regulations, promulgated to protect customer assets.
Financial Instruments	'
	Financial Instruments
	Financial instruments owned and Financial instruments sold, not yet purchased are recorded at fair value, either as required by accounting pronouncements or through the fair value option election. These instruments primarily represent our trading activities and include both cash and derivative products. Gains and losses are recognized in Principal transactions in our Consolidated Statements of Earnings. The fair value of a financial instrument is the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (the exit price).
	Fair Value Hierarchy
	In determining fair value, we maximize the use of observable inputs and minimize the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from independent sources. Unobservable inputs reflect our assumptions that market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. We apply a hierarchy to categorize our fair value measurements broken down into three levels based on the transparency of inputs as follows:
	Level 1:	Quoted prices are available in active markets for identical assets or liabilities at the reported date.
	Level 2:	Pricing inputs are other than quoted prices in active markets, which are either directly or indirectly observable as of the reported date. The nature of these financial instruments include cash instruments for which quoted prices are available but traded less frequently, derivative instruments whose fair value have been derived using a model where inputs to the model are directly observable in the market, or can be derived principally from or corroborated by observable market data, and instruments that are fair valued using other financial instruments, the parameters of which can be directly observed.
	Level 3:	Instruments that have little to no pricing observability at the reported date. These financial instruments are measured using management’s best estimate of fair value, where the inputs into the determination of fair value require significant management judgment or estimation.
	Financial instruments are valued at quoted market prices, if available. Certain financial instruments have bid and ask prices that can be observed in the marketplace. For financial instruments whose inputs are based on bid-ask prices, the financial instrument is valued at the point within the bid-ask range that meets our best estimate of fair value. We use prices and inputs that are current at the measurement date. For financial instruments that do not have readily determinable fair values using quoted market prices, the determination of fair value is based upon consideration of available information, including types of financial instruments, current financial information, restrictions on dispositions, fair values of underlying financial instruments and quotations for similar instruments.
	The valuation of financial instruments may include the use of valuation models and other techniques. Adjustments to valuations derived from valuation models may be made when, in management’s judgment, features of the financial instrument such as its complexity, the market in which the financial instrument is traded and risk uncertainties about market conditions require that an adjustment be made to the value derived from the models. Adjustments from the price derived from a valuation model reflect management’s judgment that other participants in the market for the financial instrument being measured at fair value would also consider in valuing that same financial instrument. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment.
	The availability of observable inputs can vary and is affected by a wide variety of factors, including, for example, the type of financial instrument and market conditions. As the observability of prices and inputs may change for a financial instrument from period to period, this condition may cause a transfer of an instrument among the fair value hierarchy levels. Transfers among the levels are recognized at the beginning of each period. The degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3.
	Valuation Process for Financial Instruments
	Our Independent Price Verification (“IPV”) Group, which is part of our Finance department, in partnership with Risk Management, is responsible for establishing our valuation policies and procedures. The IPV Group and Risk Management, which are independent of our business functions, play an important role and serve as a control function in determining that our financial instruments are appropriately valued and that fair value measurements are reliable. This is particularly important where prices or valuations that require inputs are less observable. In the event that observable inputs are not available, the control processes are designed to assure that the valuation approach utilized is appropriate and consistently applied and that the assumptions are reasonable. The IPV Group reports to the Global Controller and is subject to the oversight of the IPV Committee, which is comprised of our Chief Financial Officer, Global Controller, Global Head of Product Control, Chief Risk Officer and Principal Accounting Officer, among other personnel. Our independent price verification policies and procedures are reviewed, at a minimum, annually and changes to the policies require the approval of the IPV Committee.
	Price Testing Process. The business units are responsible for determining the fair value of our financial instruments using approved valuation models and methodologies. In order to ensure that the business unit valuations represent a fair value exit price, the IPV Group tests and validates the fair value of our financial instruments inventory. In the testing process, the IPV Group obtains prices and valuation inputs from sources independent of Jefferies, consistently adheres to established procedures set forth in our valuation policies for sourcing prices and valuation inputs and utilizing valuation methodologies. Sources used to validate fair value prices and inputs include, but are not limited to, exchange data, recently executed transactions, pricing data obtained from third party vendors, pricing and valuation services, broker quotes and observed comparable transactions.
	To the extent discrepancies between the business unit valuations and the pricing or valuations resulting from the price testing process are identified, such discrepancies are investigated by the IPV Group and fair values are adjusted, as appropriate. The IPV Group maintains documentation of its testing, results, rationale and recommendations and prepares a monthly summary of its valuation results. This process also forms the basis for our classification of fair values within the fair value hierarchy (i.e., Level 1, Level 2 or Level 3). The IPV Group utilizes the additional expertise of Risk Management personnel in valuing more complex financial instruments and financial instruments with less or limited pricing observability. The results of the valuation testing are reported to the IPV Committee on a monthly basis, which discusses the results and is charged with the final conclusions as to the financial instrument fair values in the consolidated financial statements. This process specifically assists the Chief Financial Officer in asserting as to the fair presentation of our financial condition and results of operations as included within our Quarterly Reports on Form 10-Q and Annual Report on Form 10-K. At each quarter end, the overall valuation results, as concluded upon by the IPV Committee, are presented to the Audit Committee.
	Judgment exercised in determining Level 3 fair value measurements is supplemented by daily analysis of profit and loss performed by the Product Control functions. Gains and losses, which result from changes in fair value, are evaluated and corroborated daily based on an understanding of each of the trading desks’ overall risk positions and developments in a particular market on the given day. Valuation techniques generally rely on recent transactions of suitably comparable financial instruments and use the observable inputs from those comparable transactions as a validation basis for Level 3 inputs. Level 3 fair value measurements are further validated through subsequent sales testing and market comparable sales, if such information is available. Level 3 fair value measurements require documentation of the valuation rationale applied, which is reviewed for consistency in application from period to period; and the documentation includes benchmarking the assumptions underlying the valuation rationale against relevant analytic data.
	Third Party Pricing Information. Pricing information obtained from external data providers (including independent pricing services and brokers) may incorporate a range of market quotes from dealers, recent market transactions and benchmarking model derived prices to quoted market prices and trade data for comparable securities. External pricing data is subject to evaluation for reasonableness by the IPV Group using a variety of means including comparisons of prices to those of similar product types, quality and maturities, consideration of the narrowness or wideness of the range of prices obtained, knowledge of recent market transactions and an assessment of the similarity in prices to comparable dealer offerings in a recent time period. We have a process whereby we challenge the appropriateness of pricing information obtained from external data providers (including independent pricing services and brokers) in order to validate the data for consistency with the definition of a fair value exit price. Our process includes understanding and evaluating the external data providers’ valuation methodologies. For corporate, U.S. government and agency and municipal debt securities, and loans, to the extent independent pricing services or broker quotes are utilized in our valuation process, the vendor service providers are collecting and aggregating observable market information as to recent trade activity and active bid-ask submissions. The composite pricing information received from the independent pricing service is thus not based on unobservable inputs or proprietary models. For mortgage- and other asset-backed securities and collateralized debt obligations, our independent pricing service uses a matrix evaluation approach incorporating both observable yield curves and market yields on comparable securities as well as implied inputs from observed trades for comparable securities in order to determine prepayment speeds, cumulative default rates and loss severity. Further, we consider pricing data from multiple service providers as available as well as compare pricing data to prices we have observed for recent transactions, if any, in order to corroborate our valuation inputs.
	Model Review Process. Where a pricing model is to be used to determine fair value, the pricing model is reviewed for theoretical soundness and appropriateness by Risk Management, independent from the trading desks, and then approved by Risk Management to be used in the valuation process. Review and approval of a model for use may include benchmarking the model against relevant third party valuations, testing sample trades in the model, backtesting the results of the model against actual trades and stress-testing the sensitivity of the pricing model using varying inputs and assumptions. In addition, recently executed comparable transactions and other observable market data are considered for purposes of validating assumptions underlying the model. Models are independently reviewed and validated by Risk Management annually or more frequently if market conditions or use of the valuation model changes.
Investments in Managed Funds	'
	Investments in Managed Funds
	Investments in managed funds include our investments in funds managed by us and our investments in related-party managed funds in which we are entitled to a portion of the management and/or performance fees. Investments in nonconsolidated managed funds are accounted for at fair value with gains or losses included in Asset management fees and investment income from managed funds in the Consolidated Statements of Earnings.
Loans to and Investments in Related Parties	'
	Loans to and Investments in Related Parties
	Loans to and investments in related parties include investments in private equity and other operating entities made in connection with our capital markets activities in which we exercise significant influence over operating and capital decisions and loans issued in connection with such activities. Loans to and investments in related parties are accounted for using the equity method or at cost, as appropriate. Revenues on Loans to and investments in related parties are included in Other revenues in the Consolidated Statements of Earnings. See Note 10, Investments, and Note 22, Related Party Transactions, for additional information regarding certain of these investments.
Receivable from and Payable to Customers	'
	Receivable from and Payable to Customers
	Receivable from and payable to customers includes amounts receivable and payable on cash and margin transactions. Securities owned by customers and held as collateral for these receivables are not reflected in the accompanying consolidated financial statements. Receivable from officers and directors included within this financial statement line item represents balances arising from their individual security transactions. These transactions are subject to the same regulations as customer transactions and are provided on substantially the same terms.
Securities Borrowed and Securities Loaned	'
	Securities Borrowed and Securities Loaned
	Securities borrowed and securities loaned are carried at the amounts of cash collateral advanced and received in connection with the transactions and accounted for as collateralized financing transactions. In connection with both trading and brokerage activities, we borrow securities to cover short sales and to complete transactions in which customers have failed to deliver securities by the required settlement date, and lend securities to other brokers and dealers for similar purposes. We have an active securities borrowed and lending matched book business in which we borrow securities from one party and lend them to another party. When we borrow securities, we generally provide cash to the lender as collateral, which is reflected in our Consolidated Statements of Financial Condition as Securities borrowed. We earn interest revenues on this cash collateral. Similarly, when we lend securities to another party, that party provides cash to us as collateral, which is reflected in our Consolidated Statements of Financial Condition as Securities loaned. We pay interest expense on the cash collateral received from the party borrowing the securities. The initial collateral advanced or received approximates or is greater than the fair value of the securities borrowed or loaned. We monitor the fair value of the securities borrowed and loaned on a daily basis and request additional collateral or return excess collateral, as appropriate.
Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase	'
	Securities Purchased Under Agreements to Resell and Securities Sold Under Agreements to Repurchase
	Securities purchased under agreements to resell and Securities sold under agreements to repurchase (collectively “repos”) are accounted for as collateralized financing transactions and are recorded at their contracted resale or repurchase amount plus accrued interest. We earn and incur interest over the term of the repo, which is reflected in Interest income and Interest expense on our Consolidated Statements of Earnings on an accrual basis. Repos are presented in the Consolidated Statements of Financial Condition on a net-basis-by counterparty, where permitted by generally accepted accounting principles. We monitor the fair value of the underlying securities daily versus the related receivable or payable balances. Should the fair value of the underlying securities decline or increase, additional collateral is requested or excess collateral is returned, as appropriate.
Premises and Equipment	'
	Premises and Equipment
	Premises and equipment are depreciated using the straight-line method over the estimated useful lives of the related assets (generally three to ten years). Leasehold improvements are amortized using the straight-line method over the term of the related leases or the estimated useful lives of the assets, whichever is shorter. Premises and equipment includes internally developed software, which was increased to its fair market value in the allocation of the purchase price on March 1, 2013. The revised carrying values of internally developed software ready for its intended use are depreciated over the remaining useful life. See Note 4, Leucadia and Related Transactions for more information regarding the allocation of the purchase price.
Goodwill and Intangible Assets	'
	Goodwill and Intangible Assets
	Goodwill. Goodwill represents the excess acquisition cost over the fair value of net tangible and intangible assets acquired. Goodwill is not amortized and is subject to annual impairment testing on August 1 or between annual tests if an event or change in circumstance occurs that would more likely than not reduce the fair value of a reporting unit below its carrying value. In testing for goodwill impairment, we have the option to first assess qualitative factors to determine whether the existence of events or circumstances lead to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of events and circumstances, we conclude that it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then performing the two-step impairment test is not required. If we conclude otherwise, we are required to perform the two-step impairment test. The goodwill impairment test is performed at the reporting unit level by comparing the estimated fair value of a reporting unit with its respective carrying value. If the estimated fair value exceeds the carrying value, goodwill at the reporting unit level is not impaired. If the estimated fair value is less than carrying value, further analysis is necessary to determine the amount of impairment, if any.
	The fair value of reporting units are based on widely accepted valuation techniques that we believe market participants would use, although the valuation process requires significant judgment and often involves the use of significant estimates and assumptions. The methodologies we utilize in estimating the fair value of reporting units include market valuation methods that incorporate price-to-earnings and price-to-book multiples of comparable exchange traded companies and multiples of merger and acquisitions of similar businesses and discounted cash flow methodologies that incorporate an appropriate risk-adjusted discount rate. The estimates and assumptions used in determining fair value could have a significant effect on whether or not an impairment charge is recorded and the magnitude of such a charge. Adverse market or economic events could result in impairment charges in future periods.
	Intangible Assets. Intangible assets deemed to have finite lives are amortized on a straight line basis over their estimated useful lives, where the useful life is the period over which the asset is expected to contribute directly, or indirectly, to our future cash flows. Intangible assets are reviewed for impairment on an interim basis when certain events or circumstances exist. For amortizable intangible assets, impairment exists when the carrying amount of the intangible asset exceeds its fair value. At least annually, the remaining useful life is evaluated.
	An intangible asset with an indefinite useful life is not amortized but assessed for impairment annually, or more frequently, when events or changes in circumstances occur indicating that it is more likely than not that the indefinite-lived asset is impaired. Impairment exists when the carrying amount exceeds its fair value. In testing for impairment, we have the option to first perform a qualitative assessment to determine whether it is more likely than not that an impairment exists. If it is determined that it is not more likely than not that an impairment exists, a quantitative impairment test is not necessary. If we conclude otherwise, we are required to perform a quantitative impairment test. Our annual indefinite-lived intangible asset impairment testing date is August 1.
	To the extent an impairment loss is recognized, the loss establishes the new cost basis of the asset that is amortized over the remaining useful life of that asset, if any. Subsequent reversal of impairment losses is not permitted.
	Refer to Note 11, Goodwill and Other Intangible Assets, for further information.
Income Taxes	'
	Income Taxes
	Prior to the Leucadia Transaction, we filed a consolidated U.S. federal income tax return, which included all of our qualifying subsidiaries. Subsequently, our results of operations are included in the consolidated federal and applicable state income tax returns filed by Leucadia. In states that neither accept nor require combined or unitary tax returns, certain subsidiaries file separate state income tax returns. We also are subject to income tax in various foreign jurisdictions in which we operate. We account for our provision for income taxes using a “separate return” method. Amounts provided for income taxes are based on income reported for financial statement purposes and do not necessarily represent amounts currently payable.
	Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and for tax loss carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date. Under acquisition accounting, the recognition of certain assets and liabilities at fair value created a change in the financial reporting basis for our assets and liabilities, while the tax basis of our assets and liabilities remained the same. As a result, deferred tax assets and liabilities were recognized for the change in the basis differences. Jefferies provides deferred taxes on its temporary differences and on any carryforwards that it could claim on its hypothetical tax return. The realization of deferred tax assets is assessed and a valuation allowance is recorded to the extent that it is more likely than not that any portion of the deferred tax asset will not be realized on the basis of its projected separate return results. The tax benefit related to Leucadia dividends and dividend equivalents paid on nonvested share-based payment awards are recognized as an increase to Additional paid-in capital. These amounts are included in tax benefits for issuance of share-based awards on the Consolidated Statements of Changes in Equity.
	We record uncertain tax positions using a two-step process: (i) we determine whether it is more likely than not that each tax position will be sustained on the basis of the technical merits of the position; and (ii) for those tax positions that meet the more-likely-than-not recognition threshold, we recognize the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority.
Legal Reserves	'
	Legal Reserves
	In the normal course of business, we have been named, from time to time, as a defendant in legal and regulatory proceedings. We are also involved, from time to time, in other exams, investigations and similar reviews (both formal and informal) by governmental and self-regulatory agencies regarding our businesses, certain of which may result in judgments, settlements, fines, penalties or other injunctions.
	We recognize a liability for a contingency in Accrued expenses and other liabilities when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. If the reasonable estimate of a probable loss is a range, we accrue the most likely amount of such loss, and if such amount is not determinable, then we accrue the minimum in the range as the loss accrual. The determination of the outcome and loss estimates requires significant judgment on the part of management. At August 31, 2014, we have reserved approximately $3.1 million for remaining payments under a non-prosecution agreement with the United States Attorney for the District of Connecticut and a settlement agreement with the Securities and Exchange Commission, both with respect to an investigation of certain purchases and sales of mortgage-backed securities. We believe that any other matters for which we have determined a loss to be probable and reasonably estimable are not material to the consolidated financial statements.
	In many instances, it is not possible to determine whether any loss is probable or even possible or to estimate the amount of any loss or the size of any range of loss. We believe that, in the aggregate, the pending legal actions or regulatory proceedings and any other exams, investigations or similar reviews (both formal and informal) should not have a material adverse effect on our consolidated results of operations, cash flows or financial condition. In addition, we believe that any amount that could be reasonably estimated of potential loss or range of potential loss in excess of what has been provided in the consolidated financial statements is not material.
Share-based Compensation	'
	Share-based Compensation
	Share-based awards are measured based on the grant-date fair value of the award and recognized over the period from the service inception date through the date the employee is no longer required to provide service to earn the award. Expected forfeitures are included in determining share-based compensation expense.
Foreign Currency Translation	'
	Foreign Currency Translation
	Assets and liabilities of foreign subsidiaries having non-U.S. dollar functional currencies are translated at exchange rates at the end of a period. Revenues and expenses are translated at average exchange rates during the period. The gains or losses resulting from translating foreign currency financial statements into U.S. dollars, net of hedging gains or losses and taxes, if any, are included in Other comprehensive income. Gains or losses resulting from foreign currency transactions are included in Principal transactions in the Consolidated Statements of Earnings.
Earnings per Common Share	'
	Earnings per Common Share
	As a single member limited liability company, earnings per share is not calculated for Jefferies Group LLC (the Successor company).
	Prior to the Leucadia Transaction, Jefferies Group, Inc. (the Predecessor company) had common shares and other common share equivalents outstanding. For the Predecessor periods, basic earnings per share (“EPS”) is computed by dividing net earnings available to common shareholders by the weighted average number of common shares outstanding and certain other shares committed to be, but not yet issued. Net earnings available to common shareholders represent net earnings to common shareholders reduced by the allocation of earnings to participating securities. Losses are not allocated to participating securities. For Predecessor periods, diluted EPS is computed by dividing net earnings available to common shareholders plus dividends on dilutive mandatorily redeemable convertible preferred stock by the weighted average number of common shares outstanding and certain other shares committed to be, but not yet issued, plus all dilutive common stock equivalents outstanding during the period. Unvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities and, therefore, are included in the earnings allocation in computing earnings per share under the two-class method of earning per share.
Securitization Activities	'
	Securitization Activities
	We engage in securitization activities related to corporate loans, commercial mortgage loans and mortgage-backed and other asset-backed securities. Such transfers of financial assets are accounted for as sales when we have relinquished control over the transferred assets. The gain or loss on sale of such financial assets depends, in part, on the previous carrying amount of the assets involved in the transfer allocated between the assets sold and the retained interests, if any, based upon their respective fair values at the date of sale. We may retain interests in the securitized financial assets as one or more tranches of the securitization. These retained interests are included within Financial instruments owned in the Consolidated Statements of Financial Condition at fair value. Any changes in the fair value of such retained interests are recognized within Principal transactions revenues in the Consolidated Statements of Earnings.
	When a transfer of assets does not meet the criteria of a sale, we account for the transfer as a secured borrowing and continue to recognize the assets of a secured borrowing in Financial instruments owned and recognize the associated financing in Other secured financings in the Consolidated Statements of Financial Condition.

Leucadia_and_Related_Transacti1

Leucadia and Related Transactions (Tables)	9 Months Ended
	Aug. 31, 2014
Business Combinations [Abstract]	'
Summary Computation of Purchase Price and Fair Values Assigned to Assets and Liabilities	'
	The summary computation of the purchase price and the fair values assigned to the assets and liabilities are presented as follows (in thousands except share amounts):
	Purchase Price
	Jefferies common stock outstanding			205,368,031
	Less: Jefferies common stock owned by Leucadia			(58,006,024	)
	Jefferies common stock acquired by Leucadia			147,362,007
	Exchange ratio			0.81
	Leucadia’s shares issued (excluding for Jefferies shares held by Leucadia)			119,363,226
	Less: restricted shares issued for share-based payment awards (1)			(6,894,856	)
	Leucadia’s shares issued, excluding share-based payment awards			112,468,370
	Closing price of Leucadia’s common stock (2)		$	26.9
	Fair value of common shares acquired by Leucadia			3,025,399
	Fair value of 3.25% cumulative convertible preferred shares (3)			125,000
	Fair value of shares-based payment awards (4)			343,811
	Fair value of Jefferies shares owned by Leucadia (5)			1,259,891
	Total purchase price		$	4,754,101
	-1	Represents shares of restricted stock included in Jefferies common stock outstanding that contained a future service requirement at March 1, 2013.
	-2	The value of the shares of common stock exchanged with Jefferies shareholders was based upon the closing price of Leucadia’s common stock at February 28, 2013, the last trading day prior to the date of acquisition.
	-3	Represents Leucadia’s 3.25% Cumulative Convertible Preferred Shares issued in exchange for Jefferies Group, Inc.’s 3.25% Series A-1 Convertible Cumulative Preferred Stock.
	-4	The fair value of share-based payment awards is calculated in accordance with ASC 718, Compensation – Stock Compensation. Share-based payment awards attributable to pre-combination service are included as part of the total purchase price. Share-based payment awards attributable to pre-combination service is estimated based on the ratio of the pre-combination service performed to the original service period of the award.
	-5	The fair value of Jefferies shares owned by Leucadia was based upon a price of $21.72, the closing price of Jefferies common stock at February 28, 2013.
Assets Acquired and Liabilities Assumed by Major Class	'
	Assets acquired:
	Cash and cash equivalents		$	3,017,958
	Cash and securities segregated			3,728,742
	Financial instruments owned, at fair value			16,413,535
	Investments in managed funds			59,976
	Loans to and investments in related parties			766,893
	Securities borrowed			5,315,488
	Securities purchased under agreements to resell			3,578,366
	Securities received as collateral			25,338
	Receivables:
	Brokers, dealers and clearing organizations			2,444,085
	Customers			1,045,251
	Fees, interest and other			225,555
	Premises and equipment			192,603
	Indefinite-lived intangible exchange memberships and licenses (1)			15,551
	Finite-lived intangible customer relationships (1)			136,002
	Finite-lived trade name (1)			131,299
	Other assets			939,600
	Total assets		$	38,036,242
	Liabilities assumed:
	Short-term borrowings		$	100,000
	Financial instruments sold, not yet purchased, at fair value			9,766,876
	Securities loaned			1,902,687
	Securities sold under agreements to repurchase			7,976,492
	Other secured financings			122,294
	Obligation to return securities received as collateral			25,338
	Payables:
	Brokers, dealers and clearing organizations			1,787,055
	Customers			5,450,781
	Accrued expenses and other liabilities			793,843
	Long-term debt			6,362,024
	Mandatorily redeemable preferred interests			358,951
	Total liabilities		$	34,646,341
	Noncontrolling interests			356,180
	Fair value of net assets acquired, excluding goodwill		$	3,033,721
	Goodwill		$	1,720,380
	-1	Intangible assets are recorded within Other assets on the Consolidated Statements of Financial Condition.

Fair_Value_Disclosures_Tables

Fair Value Disclosures (Tables)	9 Months Ended
	Aug. 31, 2014
Fair Value Disclosures [Abstract]	'
Financial Assets and Liabilities Accounted for at Fair Value on Recurring Basis	'
	The following is a summary of our financial assets and liabilities that are accounted for at fair value on a recurring basis at August 31, 2014 and November 30, 2013 by level within the fair value hierarchy (in thousands):
			August 31, 2014
			Level 1(1)			Level 2(1)			Level 3				Counterparty and			Total
													Cash Collateral
													Netting (2)
	Assets:
	Financial instruments owned:
	Corporate equity securities		$	2,343,374		$	336,954		$	7,777			$	—		$	2,688,105
	Corporate debt securities			—			3,294,075			36,884				—			3,330,959
	Collateralized debt obligations			—			258,442			43,740				—			302,182
	U.S. government and federal agency securities			3,375,064			108,067			2,494				—			3,485,625
	Municipal securities			—			468,656			—				—			468,656
	Sovereign obligations			1,570,726			840,524			—				—			2,411,250
	Residential mortgage-backed securities			—			2,456,612			81,034				—			2,537,646
	Commercial mortgage-backed securities			—			942,224			19,327				—			961,551
	Other asset-backed securities			—			80,556			2,079				—			82,635
	Loans and other receivables			—			1,419,105			188,025				—			1,607,130
	Derivatives			91,950			3,378,352			1,204				(3,112,831	)		358,675
	Investments at fair value			—			5,541			116,387				—			121,928
	Physical commodities			—			63,831			—				—			63,831
	Total financial instruments owned		$	7,381,114		$	13,652,939		$	498,951			$	(3,112,831	)	$	18,420,173
	Level 3 financial instruments for which the firm does not bear economic exposure (3)									(18,948	)
	Level 3 financial instruments for which the firm bears economic exposure								$	480,003
	Cash and cash equivalents		$	4,035,239		$	—		$	—			$	—		$	4,035,239
	Investments in managed funds		$	—		$	19,559		$	58,322			$	—		$	77,881
	Cash and securities segregated and ondeposit for regulatory purposes (4)		$	3,301,185		$	—		$	—			$	—		$	3,301,185
	Securities received as collateral		$	8,326		$	—		$	—			$	—		$	8,326
	Total Level 3 assets								$	538,325
	Liabilities:
	Financial instruments sold, not yet purchased:
	Corporate equity securities		$	1,749,610		$	66,422		$	38			$	—		$	1,816,070
	Corporate debt securities			—			1,617,826			242				—			1,618,068
	Collateralized debt obligations			—			500			—				—			500
	U.S. government and federal agency securities			2,851,698			—			—				—			2,851,698
	Municipal securities			—			—			—				—			—
	Sovereign obligations			1,457,265			824,142			—				—			2,281,407
	Residential mortgage-backed securities			—			3,114			—				—			3,114
	Loans			—			825,758			6,661				—			832,419
	Derivatives			230,856			3,125,513			14,784				(3,104,148	)		267,005
	Physical commodities			—			52,966			—				—			52,966
	Total financial instruments sold, not yet purchased		$	6,289,429		$	6,516,241		$	21,725			$	(3,104,148	)	$	9,723,247
	Obligation to return securities received as collateral		$	8,326		$	—		$	—			$	—		$	8,326
	Other secured financings		$	—		$	—		$	31,666			$	—		$	31,666
	Embedded conversion option		$	—		$	—		$	1,432			$	—		$	1,432
	-1	There were no transfers between Level 1 and Level 2 for the nine months ended August 31, 2014.
	-2	Represents counterparty and cash collateral netting across the levels of the fair value hierarchy for positions with the same counterparty.
	-3	Consists of assets which are financed by nonrecourse secured financing.
	-4	Cash and securities segregated and on deposit for regulatory purposes include U.S. government securities with a fair value of $564.3 million.
			November 30, 2013
			Level 1 (1)			Level 2 (1)			Level 3				Counterparty and			Total
													Cash Collateral
													Netting (2)
	Assets:
	Financial instruments owned:
	Corporate equity securities		$	1,913,220		$	175,493		$	9,884			$	—		$	2,098,597
	Corporate debt securities			—			2,957,102			25,666				—			2,982,768
	Collateralized debt obligations			—			182,095			37,216				—			219,311
	U.S. government and federal agency securities			2,293,221			40,389			—				—			2,333,610
	Municipal securities			—			664,054			—				—			664,054
	Sovereign obligations			1,458,803			889,685			—				—			2,348,488
	Residential mortgage-backed securities			—			2,932,268			105,492				—			3,037,760
	Commercial mortgage-backed securities			—			1,130,410			17,568				—			1,147,978
	Other asset-backed securities			—			55,475			12,611				—			68,086
Loans and other receivables			—			1,203,238			145,890				—			1,349,128
Derivatives			40,952			2,472,237			1,493				(2,253,589	)		261,093
Investments at fair value			—			40			101,242				—			101,282
Physical commodities			—			37,888			—				—			37,888
Total financial instruments owned		$	5,706,196		$	12,740,374		$	457,062			$	(2,253,589	)	$	16,650,043
Level 3 financial instruments for which the firm does not bear economic exposure									—
Level 3 financial instruments for which the firm bears economic exposure								$	457,062
Cash and cash equivalents		$	3,561,119		$	—		$	—			$	—		$	3,561,119
Investments in managed funds		$	—		$	—		$	57,285			$	—		$	57,285
Cash and securities segregated and on deposit for regulatory purposes (3)		$	3,616,602		$	—		$	—			$	—		$	3,616,602
Securities received as collateral		$	11,063		$	—		$	—			$	—		$	11,063
Total Level 3 assets								$	514,347
Liabilities:
Financial instruments sold, not yet purchased:
Corporate equity securities		$	1,782,903		$	40,358		$	38			$	—		$	1,823,299
Corporate debt securities			—			1,346,078			—				—			1,346,078
U.S. government and federal agency securities			1,324,326			—			—				—			1,324,326
Sovereign obligations			1,360,269			471,088			—				—			1,831,357
Residential mortgage-backed securities			—			34,691			—				—			34,691
Loans			—			672,838			22,462				—			695,300
Derivatives			43,829			2,480,463			8,398				(2,352,611	)		180,079
Physical commodities			—			36,483			—				—			36,483
Total financial instruments sold, not yet purchased		$	4,511,327		$	5,081,999		$	30,898			$	(2,352,611	)	$	7,271,613
Obligation to return securities received as collateral		$	11,063		$	—		$	—			$	—		$	11,063
Other secured financings		$	—		$	31,000		$	8,711			$	—		$	39,711
Embedded conversion option		$	—		$	—		$	9,574			$	—		$	9,574
-1	During the nine months ended November 30, 2013, we transferred listed equity options with a fair value of $403.0 million within Financial instruments owned and $423.0 million within Financial instruments sold, not yet purchased from Level 1 to Level 2 as adjustments to the exchange closing price are necessary to best reflect the fair value of the population at its exit price.
-2	Represents counterparty and cash collateral netting across the levels of the fair value hierarchy for positions with the same counterparty.
-3	Cash and securities segregated and on deposit for regulatory purposes include U.S. government securities with a fair value of $304.2 million.
Investments Measured at Fair Value Based on Net Asset Value Per Share	'
	The following tables present information about our investments in entities that have the characteristics of an investment company at August 31, 2014 and November 30, 2013 (in thousands):
			August 31, 2014
			Fair Value (1)			Unfunded			Redemption Frequency
						Commitments			(if currently eligible)
	Equity Long/Short Hedge Funds (2)		$	39,452		$	—		Monthly, Quarterly
	High Yield Hedge Funds (3)			210			—		—
	Fund of Funds (4)			334			94		—
	Equity Funds (5)			69,232			26,023		—
	Convertible Bond Funds (6)			3,590			—		At Will
	Total (7)		$	112,818		$	26,117
			November 30, 2013
			Fair Value (1)			Unfunded			Redemption Frequency
						Commitments			(if currently eligible)
	Equity Long/Short Hedge Funds (2)		$	20,927		$	—		Monthly, Quarterly
	High Yield Hedge Funds (3)			244			—		—
	Fund of Funds (4)			494			94		—
	Equity Funds (5)			66,495			40,816		—
	Convertible Bond Funds (6)			3,473			—		At Will
	Total (7)		$	91,633		$	40,910
	-1	Where fair value is calculated based on net asset value, fair value has been derived from each of the funds’ capital statements.
	-2	This category includes investments in hedge funds that invest, long and short, in equity securities in domestic and international markets in both the public and private sectors. At August 31, 2014 and November 30, 2013, investments representing approximately 99% and 98%, respectively, of the fair value of investments in this category are redeemable with 30—65 days prior written notice, and includes an investment in a private asset management fund managed by us with a fair value of $16.0 million at August 31, 2014.
	-3	Includes investments in funds that invest in domestic and international public high yield debt, private high yield investments, senior bank loans, public leveraged equities, distressed debt, and private equity investments. There are no redemption provisions. The underlying assets of the funds are being liquidated and we are unable to estimate when the underlying assets will be fully liquidated.
	-4	Includes investments in fund of funds that invest in various private equity funds. At August 31, 2014 and November 30, 2013, approximately 96% and 98%, respectively, of the fair value of investments in this category are managed by us and have no redemption provisions, instead distributions are received through the liquidation of the underlying assets of the fund of funds, which are estimated to be liquidated in approximately two years. For the remaining investments we have requested redemption; however, we are unable to estimate when these funds will be received.
	-5	At August 31, 2014 and November 30, 2013, investments representing approximately 99% and 99%, respectively, of the fair value of investments in this category include investments in equity funds that invest in the equity of various U.S. and foreign private companies in the energy, technology, internet service and telecommunication service industries. These investments cannot be redeemed, instead distributions are received through the liquidation of the underlying assets of the funds which are expected to liquidate in one to eight years. The remaining investments are in liquidation and we are unable to estimate when the underlying assets will be fully liquidated. At August 31, 2014 and November 30, 2013, this category includes investments in equity funds managed by us with a fair value of $58.8 million and $54.4 million and unfunded commitments of $24.4 million and $39.2 million, respectively.
	-6	This category represents an investment in the Jefferies Umbrella Fund, an open-ended investment company managed by us that invests primarily in convertible bonds. The investment is redeemable with 5 days prior written notice.
	-7	Investments at fair value in the Consolidated Statements of Financial Condition at August 31, 2014 and November 30, 2013 include $87.0 million and $66.9 million, respectively, of direct investments which do not have the characteristics of investment companies and therefore not included within this table.
Summary of Valuation Bases (Pricing Information) for Financial Instruments	'
	At August 31, 2014 and November 30, 2013, our Financial instruments owned and Financial instruments sold, not yet purchased are measured using different valuation bases as follows:
			August 31, 2014						November 30, 2013
			Financial			Financial			Financial				Financial
			Instruments Owned			Instruments Sold,			Instruments Owned				Instruments Sold,
						Not Yet							Not Yet
						Purchased							Purchased
	Exchange closing prices			13	%		18	%		12	%			25	%
	Recently observed transaction prices.			3	%		3	%		5	%			4	%
	External pricing services			70	%		72	%		68	%			66	%
	Broker quotes			4	%		3	%		3	%			3	%
	Valuation techniques			10	%		4	%		12	%			2	%
				100	%		100	%		100	%			100	%
Summary of Changes in Fair Value of Financial Assets and Liabilities Classified as Level 3	'
	The following is a summary of changes in fair value of our financial assets and liabilities that have been categorized within Level 3 of the fair value hierarchy for the three months ended August 31, 2014 (in thousands):
			Successor
			Three Months Ended August 31, 2014
			Balance at			Total gains/			Purchases				Sales			Settlements			Issuances			Net			Balance at			Change in
			May 31,			losses																transfers			August 31,			unrealized gains/
			2014			(realized and																into/			2014			(losses) relating
						unrealized)																(out of)						to instruments
						-1																Level 3						still held at
																												August 31,
																												2014 (1)
	Assets:
	Financial instruments owned:
	Corporate equity securities		$	16,402		$	(480	)	$	4,528			$	(529	)	$	—		$	—		$	(12,144	)	$	7,777		$	(286	)
	Corporate debt securities			31,648			5,454			21,793				(15,713	)		(34	)		—			(6,264	)		36,884			3,470
	Collateralized debt obligations			42,313			(845	)		7,613				(15,204	)		—			—			9,863			43,740			(1,575	)
	U.S government and federal agency securities			—			(11	)		2,505				—			—			—			—			2,494			(11	)
	Residential mortgage-backed securities			71,962			(2,557	)		3,981				(9,635	)		(325	)		—			17,608			81,034			(302	)
	Commercial mortgage-backed securities			24,246			(256	)		641				(7,068	)		—			—			1,764			19,327			(832	)
	Other asset-backed securities			45,444			1,272			50,620				(49,411	)		(8,774	)		—			(37,072	)		2,079			(3	)
	Loans and other receivables			138,643			(8,074	)		194,387				(96,340	)		(40,617	)		—			26			188,025			(7,967	)
	Investments, at fair value			118,071			(4	)		500				(7,232	)		(305	)		—			5,357			116,387			105
	Investments in managed funds			56,119			734			1,469				—			—			—			—			58,322			734
	Liabilities:
	Financial instruments sold, not yet purchased:
	Corporate equity securities		$	38		$	—		$	—			$	—		$	—		$	—		$	—		$	38		$	—
	Corporate debt securities			2,780			(101	)		(2,566	)			—			—			—			129			242			67
	Net derivatives (2)			15,282			(1,632	)		(74	)			74			(70	)		—			—			13,580			70
	Loans			31,534			—			(16,307	)			—			—			—			(8,566	)		6,661			—
	Other secured financings			20,288			—			—				—			(7,570	)		18,948			—			31,666			—
	Embedded conversion option			3,895			(2,463	)		—				—			—			—			—			1,432			2,463
	-1	Realized and unrealized gains/losses are reported in Principal transactions in the Consolidated Statements of Earnings.
	-2	Net derivatives represent Financial instruments owned – Derivatives and Financial instruments sold, not yet purchased – Derivatives.
	The following is a summary of changes in fair value of our financial assets and liabilities that have been categorized within Level 3 of the fair value hierarchy for the nine months ended August 31, 2014 (in thousands):
			Successor
			Nine Months Ended August 31, 2014
			Balance at			Total			Purchases				Sales			Settlements			Issuances			Net			Balance at			Change in
			November 30,			gains/																transfers			August 31,			unrealized gains/
			2013			losses																into/			2014			(losses) relating
						(realized																(out of)						to instruments
						and																Level 3						still held at
						unrealized)																						August 31,
						-1																						2014 (1)
	Assets:
	Financial instruments owned:
	Corporate equity securities		$	9,884		$	(1,528	)	$	36,661			$	(31,444	)	$	—		$	—		$	(5,796	)	$	7,777		$	(400	)
	Corporate debt securities			25,666			10,727			137,164				(128,733	)		—			—			(7,940	)		36,884			10,177
	Collateralized debt obligations			37,216			5,198			94,743				(99,661	)		—			—			6,244			43,740			(6,283	)
	U.S goevernment and federal agency securities			—			(11	)		2,505				—			—			—			—			2,494			(11	)
	Residential mortgage-backed securities			105,492			(6,974	)		44,454				(65,229	)		(812	)		—			4,103			81,034			(3,564	)
	Commercial mortgage-backed securities			17,568			(3,120	)		34,959				(32,774	)		(1,315	)		—			4,009			19,327			(3,380	)
	Other asset-backed securities			12,611			256			52,495				(52,282	)		(8,804	)		—			(2,197	)		2,079			—
	Loans and other receivables			145,890			(9,028	)		247,383				(147,851	)		(61,791	)		—			13,422			188,025			(8,961	)
	Investments, at fair value			101,242			27,264			30,660				(40,916	)		(945	)		—			(918	)		116,387			12,775
	Investments in managed funds			57,285			(10,515	)		14,875				—			—			—			(3,323	)		58,322			(10,515	)
	Liabilities:
	Financial instruments sold, not yet purchased:
	Corporate equity securities		$	38		$	—		$	—			$	—		$	—		$	—		$	—		$	38		$	—
	Corporate debt securities			—			163			(7	)			97			—			—			(11	)		242			(163	)
	Net derivatives (2)			6,905			9,959			(124	)			(76	)		248			—			(3,332	)		13,580			(10,519	)
	Loans			22,462			—			(15,472	)			3,549			—			—			(3,878	)		6,661			—
	Other secured financings			8,711			—			—				—			(16,684	)		39,639			—			31,666			—
	Embedded conversion option			9,574			(8,142	)		—				—			—			—			—			1,432			8,142
	-1	Realized and unrealized gains/losses are reported in Principal transactions in the Consolidated Statements of Earnings.
-2	Net derivatives represent Financial instruments owned – Derivatives and Financial instruments sold, not yet purchased – Derivatives.
The following is a summary of changes in fair value of our financial assets and liabilities that have been categorized within Level 3 of the fair value hierarchy for the three months ended August 31, 2013 (in thousands):
		Successor
		Three Months Ended August 31, 2013 (1)
		Balance at			Total gains/			Purchases				Sales			Settlements			Net			Balance at			Change in
		May 31,			losses (realized													transfers			August 31,			unrealized gains/
		2013			and unrealized)													into/			2013			(losses) relating
					-2													(out of)						to instruments
																		Level 3						still held at
																								August 31,
																								2013 (2)
Assets:
Financial instruments owned:
Corporate equity securities		$	19,577		$	(788	)	$	—			$	(930	)	$	—		$	(1,780	)	$	16,079		$	(786	)
Corporate debt securities			18,615			(4,285	)		68				(571	)		—			6,806			20,633			(4,342	)
Collateralized debt obligations			40,084			(1,903	)		8,222				(4,236	)		—			(1,335	)		40,832			(2,388	)
Residential mortgage-backed securities			143,766			(1,876	)		33,831				(50,938	)		(2,306	)		9,706			132,183			(3,898	)
Commercial mortgage-backed securities			16,068			2,033			130				(310	)		(3,703	)		205			14,423			(1,106	)
Other asset-backed securities			1,484			2,170			7,576				(3,279	)		—			659			8,610			2,142
Loans and other receivables			117,496			(198	)		52,246				(12,139	)		(25,395	)		(1,558	)		130,452			609
Investments, at fair value			81,364			1,848			—				(101	)		(710	)		(3,949	)		78,452			2,002
Investments in managed funds			55,141			4,034			6,598				—			(9,876	)		—			55,897			4,034
Liabilities:
Financial instruments sold, not yet purchased:
Corporate equity securities		$	38		$	—		$	—			$	—		$	—		$	—		$	38		$	—
Net derivatives (3)			10,799			3,899			—				—			(60	)		—			14,638			(3,899	)
Loans			15,212			—			(14,952	)			716			—			—			976			—
Other secured financings			2,294			731			—				—			—			—			3,025			(731	)
Embedded conversion option			10,902			(3,566	)		—				—			—			—			7,336			3,566
-1	There were no issuances during the three months ended August 31, 2013.
-2	Realized and unrealized gains/losses are reported in Principal transactions in the Consolidated Statements of Earnings.
-3	Net derivatives represent Financial instruments owned – Derivatives and Financial instruments sold, not yet purchased – Derivatives.
The following is a summary of changes in fair value of our financial assets and liabilities that have been categorized within Level 3 of the fair value hierarchy for the six months ended August 31, 2013 (in thousands):
		Successor
		Six Months Ended August 31, 2013 (1)
		Balance at			Total gains/			Purchases				Sales			Settlements			Net			Balance at			Change in
		February 28,			losses (realized													transfers			August 31,			unrealized gains/
		2013			and unrealized)													into/			2013			(losses) relating
					-2													(out of)						to instruments
																		Level 3						still held at
																								August 31,
																								2013 (2)
Assets:
Financial instruments owned:
Corporate equity securities		$	13,234		$	1,053		$	213			$	(753	)	$	266		$	2,066		$	16,079		$	1,243
Corporate debt securities			31,820			(17,415	)		708				(2,556	)		—			8,076			20,633			(6,933	)
Collateralized debt obligations			24,736			(2,008	)		43,152				(27,676	)		—			2,628			40,832			(3,830	)
Residential mortgage-backed securities			169,426			5,594			79,531				(105,671	)		(4,851	)		(11,846	)		132,183			586
Commercial mortgage-backed securities			17,794			(735	)		1,533				(3,054	)		(5,281	)		4,166			14,423			(5,007	)
Other asset-backed securities			1,292			2,168			7,618				(3,127	)		—			659			8,610			2,077
Loans and other receivables			170,986			(5,103	)		206,672				(26,630	)		(213,662	)		(1,811	)		130,452			(8,063	)
Investments, at fair value			75,067			653			5,000				(102	)		(3,204	)		1,038			78,452			668
Investments in managed funds			59,976			3,108			9,130				—			(16,439	)		122			55,897			3,108
Liabilities:
Financial instruments sold, not yet purchased:
Corporate equity securities		$	38		$	—		$	—			$	—		$	—		$	—		$	38		$	—
Residential mortgage-backed securities			1,542			(1,542	)		—				—			—			—			—			—
Net derivatives (3)			11,185			3,453			—				—			—			—			14,638			(3,453	)
Loans			7,398			—			(20,221	)			13,799			—			—			976			—
Other secured financings			—			731			—				—			—			2,294			3,025			(731	)
Embedded conversion option (4)			16,488			(9,152	)		—				—			—			—			7,336			9,152
-1	There were no issuances during the six months ended August 31, 2013.
-2	Realized and unrealized gains/losses are reported in Principal transactions in the Consolidated Statements of Earnings.
-3	Net derivatives represent Financial instruments owned – Derivatives and Financial instruments sold, not yet purchased – Derivatives.
-4	The embedded conversion option of $16.5 million is at March 1, 2013, upon completion of the Leucadia Transaction (see Note 13).
The following is a summary of changes in fair value of our financial assets and liabilities that have been categorized within Level 3 of the fair value hierarchy for the three months ended February 28, 2013 (in thousands):
		Predecessor
		Three Months Ended February 28, 2013 (1)
		Balance at			Total gains/			Purchases				Sales			Settlements			Net			Balance at			Change in
		November 30,			losses (realized													transfers			February			unrealized gains/
		2012			and unrealized)													into/			28, 2013			(losses) relating
					-2													(out of)						to instruments
																		Level 3						still held at
																								February 28,
																								2013 (2)
Assets:
Financial instruments owned:
Corporate equity securities		$	16,815		$	200		$	707			$	109		$	—		$	(4,597	)	$	13,234		$	172
Corporate debt securities			3,631			7,836			11,510				(1,918	)		—			10,761			31,820			7,833
Collateralized debt obligations			31,255			3,584			4,406				(17,374	)		—			2,865			24,736			(1,165	)
Residential mortgage-backed securities			156,069			11,906			132,773				(130,143	)		(6,057	)		4,878			169,426			4,511
Commercial mortgage-backed securities			30,202			(995	)		2,280				(2,866	)		(1,188	)		(9,639	)		17,794			(2,059	)
Other asset-backed securities			1,114			90			1,627				(1,342	)		(19	)		(178	)		1,292			39
Loans and other receivables			180,393			(8,682	)		105,650				(29,828	)		(61,407	)		(15,140	)		170,986			(12,374	)
Investments, at fair value			83,897			961			5,952				(4,923	)		(9,721	)		(1,099	)		75,067			1,171
Investments in managed funds			57,763			(363	)		11,068				—			(8,492	)		—			59,976			(363	)
Liabilities:
Financial instruments sold, not yet purchased:
Corporate equity securities		$	38		$	—		$	—			$	—		$	—		$	—		$	38		$	—
Residential mortgage-backed securities			—			25			(73,846	)			75,363			—			—			1,542			(19	)
Net derivatives (3)			9,188			2,648			—				—			—			(651	)		11,185			(2,648	)
Loans			1,711			—			(1,711	)			7,398			—			—			7,398			—
-1	There were no issuances during the three months ended February 28, 2013.
-2	Realized and unrealized gains/losses are reported in Principal transactions in the Consolidated Statements of Earnings.
-3	Net derivatives represent Financial instruments owned – Derivatives and Financial instruments sold, not yet purchased – Derivatives.
Quantitative Information about Significant Unobservable Inputs Used in Level 3 Fair Value Measurements	'
	The disclosed inputs when compared with the inputs as disclosed in other quarters should not be expected to necessarily be indicative of changes in our estimates of unobservable inputs for a particular financial instrument as the population of financial instruments comprising the category will vary from period to period based on purchases and sales of financial instruments during the period as well as transfers into and out of Level 3 each period.
	August 31, 2014
	Financial Instruments Owned		Fair Value			Valuation Technique		Significant Unobservable Input(s)	Input / Range		Weighted
			(in thousands)								Average
	Corporate equity securities		$	7,777
	Non-exchange traded securities					Market approach		EBITDA (a) multiple	3.05			—
								Transaction Level	2.95			—
	Corporate debt securities		$	34,965		Market approach		Yield	3.7%-4.4%			4.2	%
						Convertible bond model		Discount rate/yield	31.90%			—
						Discounted cash flows		Constant prepayment rate	20.00%			—
								Constant default rate	2.00%			—
								Loss severity	25.00%			—
								Yield	16.00%			—
	Collateralized debt obligations		$	41,690		Discounted cash flows		Constant prepayment rate	10% - 20%			15.29	%
								Constant default rate	2%			—
								Loss severity	25% - 95%			55.7	%
								Yield	0% - 47.3%			7.83	%
	U.S. government and federal agency securities		$	2,494		Market approach		Transaction Level	$100			—
	Residential mortgage-backed securities		$	81,034		Discounted cash flows		Constant prepayment rate	3% - 50%			11.9	%
								Constant default rate	1% - 100%			14.5	%
								Loss severity	20% - 80%			48.4	%
								Yield	1.2% - 12.6%			6	%
	Commercial mortgage-backed securities		$	19,327		Discounted cash flows		Yield	7.6% - 15%			11.6	%
								Cumulative loss rate	4.6% - 74%			16.7	%
	Other asset-backed securities		$	2,079		Discounted cash flows		Constant prepayment rate	0%			—
								Constant default rate	0%			—
								Loss severity	0%			—
								Yield	7%			—
	Loans and other receivables		$	179,189		Comparable pricing		Comparable bond or loan price	$92.5 - $100		$	99.63
						Market approach		Yield	2.6% - 4.6%			3.9	%
								EBITDA (a) multiple	3.05-7			6.64
						Scenario analysis		Estimated recovery percentage	10.33% - 81.3%			70.9	%
	Investments at fair value
	Private equity securities		$	29,135		Comparable pricing		Comparable share price	$26.80			—
						Market approach		Transaction Level	$50.36			—
	Liabilities		Fair Value			Valuation Technique		Significant Unobservable Input(s)	Input / Range		Weighted
			(in thousands)								Average
	Financial Instruments Sold, Not Yet Purchased:
	Derivatives
	Unfunded commitment		$	14,784		Comparable pricing		Comparable loan price	$93.5 - $99.625		$	94.64
						Market Approach		Yield	4.58%			—
	Embedded conversion option		$	1,432		Option valuation model		Historical volatility	18.38%			—
								Dividend yield	1.00%			—
	(a)	Earnings before interest, taxes, depreciation and amortization (“EBITDA”).
	November 30, 2013
	Financial Instruments Owned		Fair Value			Valuation Technique		Significant Unobservable Input(s)	Input / Range		Weighted
			(in thousands)								Average
	Corporate equity securities		$	8,034
	Non-exchange traded securities					Market approach		EBITDA multiple	4.0 to 5.5			4.53
	Warrants					Option model		Volatility	36%			—
	Corporate debt securities		$	17,699		Scenario analysis		Estimated recovery percentage	24%			—
						Comparable pricing		Comparable bond or loan price	$69.10 to		$	69.91
									$70.50
						Market approach		Yield	13%			—
	Collateralized debt obligations		$	34,316		Discounted cash flows		Constant prepayment rate	0% to 20%			13	%
								Constant default rate	2% to 3%			2	%
								Loss severity	30% to 85%			38	%
								Yield	3% to 91%			28	%
	Residential mortgage-backed securities		$	105,492		Discounted cash flows		Constant prepayment rate	2% to 50%			11	%
								Constant default rate	1% to 100%			17	%
								Loss severity	30% to 90%			48	%
								Yield	0% to 20%			7	%
	Commercial mortgage-backed securities		$	17,568		Discounted cash flows		Yield	12% to 20%			14	%
							Cumulative loss rate	5% to 28.2%			11	%
Other asset-backed securities		$	12,611		Discounted cash flows		Constant prepayment rate	4% to 30%			17	%
							Constant default rate	2% to 11%			7	%
							Loss severity	40% to 92%			64	%
							Yield	3% to 29%			18	%
Loans and other receivables		$	101,931		Comparable pricing		Comparable bond or loan price	$91 to $101		$	98.9
					Market approach		Yield	8.75% to 13.5%			10	%
							EBITDA (a) multiple	6.9			—
					Scenario analysis		Estimated recovery percentage	16.9% to 92%			74	%
Derivatives
Loan commitments		$	1,493		Comparable pricing		Comparable bond or loan price	$100.88			—
Investments at fair value
Private equity securities		$	30,203		Comparable pricing		Comparable share price	$414			—
					Market approach		Discount rate	15% to 30%			23	%
Liabilities		Fair Value			Valuation Technique		Significant Unobservable Input(s)	Input / Range		Weighted
		(in thousands)								Average
Financial Instruments Sold, Not Yet Purchased:
Derivatives
Equity options		$	8,398		Option model		Volatility	36.25% to 41%			39	%
Loans		$	8,106		Comparable pricing		Comparable bond or loan price	$101.88			—
Embedded conversion option		$	9,574		Option valuation model		Historical volatility	22.55%			—
							Dividend yield	0.87%			—
Summary of Gains (Losses) Due to Changes in Instrument Specific Credit Risk and Summary of Contractual Principal Exceeds Fair Value for Loans and Other Receivables	'
	The following is a summary of gains (losses) due to changes in instrument specific credit risk on loans and other receivables and loan commitments measured at fair value under the fair value option (in thousands):
			Successor																Predecessor
			Three Months Ended			Nine Months Ended			Three Months Ended				Six Months Ended						Three Months Ended
			August 31, 2014			August 31, 2014			August 31, 2013				August 31, 2013						February 28, 2013
	Financial Instruments Owned:
	Loans and other receivables		$	(15,002	)	$	(12,841	)	$	1,097			$	2,284					$	3,924
	Financial Instruments Sold:
	Loans		$	103		$	(751	)	$	—			$	—					$	—
	Loan commitments			1,338			(10,299	)		4,440				(2,059	)					(2,746	)
	The following is a summary of the amount by which contractual principal exceeds fair value for loans and other receivables measured at fair value under the fair value option (in thousands):
			August 31, 2014			November 30, 2013
	Financial Instruments Owned:
	Loans and other receivables (1)		$	333,925		$	264,896
	Loans and other receivables greater than 90 days past due (1)			4,443			—
	Loans and other receivables on nonaccrual status (1) (2)			(42,085	)		—
	-1	Interest income is recognized separately from other changes in fair value and is included within Interest revenues on the Consolidated Statements of Earnings.
	-2	Amount includes all loans and other receivables greater than 90 or more days past due.

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	9 Months Ended
	Aug. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Fair Value and Related Number of Derivative Contracts Categorized by Type of Derivative Contract	'
	The following tables present the fair value and related number of derivative contracts at August 31, 2014 and November 30, 2013 categorized by type of derivative contract.
			August 31, 2014 (1)
			Assets						Liabilities
			Fair Value			Number of			Fair Value			Number of
						Contracts						Contracts
	Interest rate contracts
	Exchange-traded		$	4,040			55,660		$	3,335			80,615
	Cleared OTC			1,001,657			2,268			1,025,998			1,949
	Bilateral OTC			823,612			1,723			794,541			710
	Foreign exchange contracts
	Exchange-traded			3			16,278			65			23,221
	Bilateral OTC			732,662			12,058			655,255			12,188
	Equity contracts
	Exchange-traded			659,267			1,887,129			606,331			1,886,569
	Bilateral OTC			49,638			2,716			72,821			280
	Commodity contracts
	Exchange-traded			56,279			1,118,702			49,926			1,123,739
	Bilateral OTC			123,678			3,422			119,784			3,733
	Credit contracts
	Cleared OTC			55,293			51			58,196			52
	Bilateral OTC			1,365			15			20,888			29
	Total gross derivative assets/ liabilities:
	Exchange-traded			719,589						659,657
	Cleared OTC			1,056,950						1,084,194
	Bilateral OTC			1,730,955						1,663,289
	Amounts offset in the Consolidated
	Statements of Financial Condition (2):
	Exchange-traded			(655,081	)					(655,081	)
	Cleared OTC			(1,040,774	)					(1,061,414	)
	Bilateral OTC			(1,452,964	)					(1,423,640	)
	Net amounts per Consolidated		$	358,675					$	267,005
	Statements of Financial Condition (3)
	-1	Exchange traded derivatives include derivatives executed on an organized exchange. Cleared OTC derivatives include derivatives executed bilaterally and subsequently novated to and cleared through central clearing counterparties. Bilateral OTC derivatives include derivatives executed and settled bilaterally without the use of an organized exchange or central clearing counterparty.
	-2	Amounts netted include both netting by counterparty and for cash collateral paid or received.
	-3	We have not received or pledged additional collateral under master netting agreements and/or other credit support agreements that is eligible to be offset beyond what has been offset in the Consolidated Statements of Financial Condition.
			November 30, 2013 (1)
			Assets						Liabilities
			Fair Value			Number of			Fair Value			Number of
						Contracts						Contracts
	Interest rate contracts
	Exchange-traded		$	8,696			57,344		$	3,846			68,268
	Cleared OTC			432,667			5,402			396,422			7,730
	Bilateral OTC			724,613			1,221			730,897			1,340
	Foreign exchange contracts
	Exchange-traded			33			111,229			40			104,205
	Bilateral OTC			653,739			7,478			693,618			8,212
	Equity contracts
	Exchange-traded			495,069			1,742,195			465,110			1,800,467
	Bilateral OTC			6,715			148			9,875			136
	Commodity contracts
	Exchange-traded			27,185			785,718			33,661			780,358
	Bilateral OTC			114,095			11,811			139,458			8,359
	Credit contracts
	Cleared OTC			49,531			49			51,632			46
	Bilateral OTC			2,339			16			8,131			19
	Total gross derivative assets/ liabilities:
	Exchange-traded			530,983						502,657
	Cleared OTC			482,198						448,054
	Bilateral OTC			1,501,501						1,581,979
	Amounts offset in the Consolidated
	Statements of Financial Condition (2):
	Exchange-traded			(489,375	)					(489,375	)
	Cleared OTC			(446,520	)					(445,106	)
Bilateral OTC			(1,317,694	)					(1,418,130	)
Net amounts per Consolidated		$	261,093					$	180,079
Statements of Financial Condition (3)
-1	Exchange traded derivatives include derivatives executed on an organized exchange. Cleared OTC derivatives include derivatives executed bilaterally and subsequently novated to and cleared through central clearing counterparties. Bilateral OTC derivatives include derivatives executed and settled bilaterally without the use of an organized exchange or central clearing counterparty.
-2	Amounts netted include both netting by counterparty and for cash collateral paid or received.
-3	We have not received or pledged additional collateral under master netting agreements and/or other credit support agreements that is eligible to be offset beyond what has been offset in the Consolidated Statements of Financial Condition.
Unrealized and Realized Gains (Losses) on Derivative Contracts	'
	The following table presents unrealized and realized gains (losses) on derivative contracts for the three and nine months ended August 31, 2014, the three and six months ended August 31, 2013 and the three months ended February 28, 2013 (in thousands):
			Successor															Predecessor
			Three Months Ended			Nine Months Ended			Three Months Ended			Six Months Ended						Three Months Ended
	Gains (Losses)		August 31, 2014			August 31, 2014			August 31, 2013			August 31, 2013						February 28, 2013
	Interest rate contracts		$	(3,803	)	$	(46,376	)	$	130,178		$	177,796					$	45,875
	Foreign exchange contracts			6,697			8,294			(3,930	)		(25	)					12,228
	Equity contracts			(49,422	)		(220,774	)		25,509			37,588						(20,938	)
	Commodity contracts			(4,991	)		32,989			15,080			36,593						19,585
	Credit contracts			(1,330	)		(17,318	)		(904	)		(13,425	)					(3,886	)
	Total		$	(52,849	)	$	(243,185	)	$	165,933		$	238,527					$	52,864
Remaining Contract Maturity of Fair Value of OTC Derivative Assets and Liabilities	'
	The following tables set forth by remaining contract maturity the fair value of OTC derivative assets and liabilities at August 31, 2014 (in thousands):
			OTC Derivative Assets (1) (2) (3)
			0 – 12 Months			1 – 5 Years			Greater Than			Cross-Maturity			Total
									5 Years			Netting (4)
	Commodity swaps, options and forwards		$	62,219		$	7,459		$	—		$	(2,344	)	$	67,334
	Equity swaps and options			1,980			36,355			5,911			—			44,246
	Total return swaps			2,816			2			—			—			2,818
	Foreign currency forwards, swaps and options			179,297			31,983			3,255			(16,960	)		197,575
	Interest rate swaps, options and forwards			49,095			107,025			152,536			(62,126	)		246,530
	Total		$	295,407		$	182,824		$	161,702		$	(81,430	)		558,503
	Cross product counterparty netting															(8,871	)
	Total OTC derivative assets included in Financial instruments owned														$	549,632
	-1	At August 31, 2014, we held exchange traded derivative assets and other credit agreements with a fair value of $69.0 million, which are not included in this table.
	-2	OTC derivative assets in the table above are gross of collateral received. OTC derivative assets are recorded net of collateral received on the Consolidated Statements of Financial Condition. At August 31, 2014, cash collateral received was $260.0 million.
	-3	Derivative fair values include counterparty netting within product category.
	-4	Amounts represent the netting of receivable balances with payable balances for the same counterparty within product category across maturity categories.
			OTC Derivative Liabilities (1) (2) (3)
			0 – 12 Months			1 – 5 Years			Greater Than			Cross-Maturity			Total
									5 Years			Netting (4)
	Commodity swaps, options and forwards		$	58,743		$	7,042		$	—		$	(2,344	)	$	63,441
	Credit default swaps			62			7,892			747			—			8,701
	Equity swaps and options			—			9,977			58,712			—			68,689
	Total return swaps			1,704			—			—			—			1,704
	Foreign currency forwards, swaps and options			106,582			27,173			3,084			(16,960	)		119,879
	Interest rate swaps, options and forwards			39,104			91,001			177,410			(62,126	)		245,389
	Total		$	206,195		$	143,085		$	239,953		$	(81,430	)		507,803
	Cross product counterparty netting															(8,871	)
	Total OTC derivative liabilities included in Financial instruments sold, not yet purchased														$	498,932
	-1	At August 31, 2014, we held exchange traded derivative liabilities and other credit agreements with a fair value of $19.2 million, which are not included in this table.
	-2	OTC derivative liabilities in the table above are gross of collateral pledged. OTC derivative liabilities are recorded net of collateral pledged on the Consolidated Statements of Financial Condition. At August 31, 2014, cash collateral pledged was $251.3 million.
	-3	Derivative fair values include counterparty netting within product category.
	-4	Amounts represent the netting of receivable balances with payable balances for the same counterparty within product category across maturity categories.
Counterparty Credit Quality with Respect to Fair Value of OTC Derivatives Assets	'
	At August 31, 2014, the counterparty credit quality with respect to the fair value of our OTC derivatives assets was as follows (in thousands):
	Counterparty credit quality (1):
	A- or higher		$	326,452
	BBB- to BBB+			69,223
	BB+ or lower			54,989
	Unrated			98,968
	Total		$	549,632
	-1	We utilize internal credit ratings determined by our Risk Management. Credit ratings determined by Risk Management use methodologies that produce ratings generally consistent with those produced by external rating agencies.

Collateralized_Transactions_Ta

Collateralized Transactions (Tables)	9 Months Ended
	Aug. 31, 2014
Banking and Thrift [Abstract]	'
Summary of Repurchase Agreements and Securities Borrowing and Lending Arrangements	'
	The following tables provide information regarding repurchase agreements and securities borrowing and lending arrangements that are recognized in the Consolidated Statements of Financial Condition and 1) the extent to which, under enforceable master netting arrangements, such balances are presented net in the Consolidated Statements of Financial Condition as appropriate under GAAP and 2) the extent to which other rights of setoff associated with these arrangements exist and could have an effect on our financial position (in thousands). See Note 6, Derivative Financial Instruments, for information related to offsetting of derivatives.
			August 31, 2014
					Netting in			Net Amounts in
					Consolidated			Consolidated		Additional
					Statement of			Statement of		Amounts
			Gross		Financial			Financial		Available for			Available
			Amounts		Condition			Condition		Setoff (1)			Collateral (2)			Net Amount (3)
	Assets
	Securities borrowing arrangements		$	6,270,452	$	—		$	6,270,452	$	(555,662	)	$	(977,138	)	$	4,737,652
	Reverse repurchase agreements		$	13,768,047	$	(9,197,514	)	$	4,570,533	$	(547,636	)	$	(3,987,093	)	$	35,804
	Liabilities
	Securities lending arrangements		$	2,468,513	$	—		$	2,468,513	$	(555,662	)	$	(1,883,794	)	$	29,057
	Repurchase agreements		$	19,729,573	$	(9,197,514	)	$	10,532,059	$	(547,636	)	$	(9,301,230	)	$	683,193
	-1	Under master netting agreements with our counterparties, we have the legal right of offset with a counterparty, which incorporates all of the counterparty’s outstanding rights and obligations under the arrangement. These balances reflect additional credit risk mitigation that is available by counterparty in the event of a counterparty’s default, but which are not netted in the balance sheet because other netting provisions of U.S. GAAP are not met.
	-2	Includes securities received or paid under collateral arrangements with counterparties that could be liquidated in the event of a counterparty default and thus offset against a counterparty’s rights and obligations under the respective repurchase agreements or securities borrowing or lending arrangements.
	-3	Amounts include $4,700.3 million of securities borrowing arrangements, for which we have received securities collateral of $4,579.8 million, and $667.4 million of repurchase agreements, for which we have pledged securities collateral of $694.5 million, which are subject to master netting agreements but we have not yet determined the agreements to be legally enforceable.
			November 30, 2013
			Gross		Netting in			Net Amounts in		Additional			Available			Net Amount (3)
			Amounts		Consolidated			Consolidated		Amounts			Collateral (2)
					Statement of			Statement of		Available for
					Financial			Financial		Setoff (1)
					Condition			Condition
	Assets
	Securities borrowing arrangements		$	5,359,846	$	—		$	5,359,846	$	(530,293	)	$	(957,140	)	$	3,872,413
	Reverse repurchase agreements		$	12,715,449	$	(8,968,529	)	$	3,746,920	$	(590,754	)	$	(3,074,540	)	$	81,626
	Liabilities
	Securities lending arrangements		$	2,506,122	$	—		$	2,506,122	$	(530,293	)	$	(1,942,271	)	$	33,558
	Repurchase agreements		$	19,748,374	$	(8,968,529	)	$	10,779,845	$	(590,754	)	$	(8,748,641	)	$	1,440,450
	-1	Under master netting agreements with our counterparties, we have the legal right of offset with a counterparty, which incorporates all of the counterparty’s outstanding rights and obligations under the arrangement. These balances reflect additional credit risk mitigation that is available by counterparty in the event of a counterparty’s default, but which are not netted in the balance sheet because other netting provisions of U.S. GAAP are not met.
	-2	Includes securities received or paid under collateral arrangements with counterparties that could be liquidated in the event of a counterparty default and thus offset against a counterparty’s rights and obligations under the respective repurchase agreements or securities borrowing or lending arrangements.
	-3	Amounts include $3,818.4 million of securities borrowing arrangements, for which we have received securities collateral of $3,721.8 million, and $1,410.0 million of repurchase agreements, for which we have pledged securities collateral of $1,438.9 million, which are subject to master netting agreements but we have not yet determined the agreements to be legally enforceable.

Securitization_Activities_Tabl

Securitization Activities (Tables)	9 Months Ended
	Aug. 31, 2014
Transfers and Servicing [Abstract]	'
Activity Related to Securitizations Accounted for as Sales	'
	The following table presents activity related to our securitizations that were accounted for as sales in which we had continuing involvement (in millions):
		Successor								Predecessor
		Three Months Ended		Nine Months Ended		Three Months Ended		Six Months Ended		Three Months Ended
		August 31, 2014		August 31, 2014		August 31, 2013		August 31, 2013		February 28, 2013
	Transferred assets	$	1,562.10	$	4,788.70	$	918.4	$	3,102.40	$	2,735.20
	Proceeds on new securitizations		1,567.20		4,795.40		921.5		3,112.50		2,751.30
	Cash flows received on retained interests	$	15.2	$	37.9	$	13	$	24.2	$	32.3
Summary of Retained Interests in SPEs	'
	The following tables summarize our retained interests in SPEs where we transferred assets and have continuing involvement and received sale accounting treatment (in millions):
		August 31, 2014
	Securitization Type	Total Assets		Retained Interests
	U.S. government agency residential mortgage-backed securities	$	17,478.60	$	312.5
	U.S. government agency commercial mortgage-backed securities		5,046.30		100.5
	Collateralized loan obligations		2,711.30		42.7
		November 30, 2013
	Securitization Type	Total Assets		Retained Interests
	U.S. government agency residential mortgage-backed securities	$	11,518.40	$	281.3
	U.S. government agency commercial mortgage-backed securities		5,385.60		96.8
	Collateralized loan obligations		728.5		9

Variable_Interest_Entities_Tab

Variable Interest Entities (Tables)	9 Months Ended
	Aug. 31, 2014
Assets and Liabilities of Consolidated VIEs Prior to Consolidation	'
	The following table presents information about our consolidated VIEs at August 31, 2014 and November 30, 2013 (in millions). The assets and liabilities in the tables below are presented prior to consolidation and thus a portion of these assets and liabilities are eliminated in consolidation.
			August 31, 2014				November 30, 2013
			Securitization		Other		Securitization		Other
			Vehicles				Vehicles
	Cash		$	—	$	0.2	$	—	$	0.2
	Financial instruments owned			56.9		0.3		97.5		0.4
	Securities purchased under agreement to resell (1)			585.2		—		195.1		—
	Fees, interest and other receivables			1		—		—		—
	Other assets			—		—		2.3		—
			$	643.1	$	0.5	$	294.9	$	0.6
	Other secured financings (2)		$	641.9	$	—	$	292.5	$	—
	Other liabilities			1.2		0.2		2.1		0.2
			$	643.1	$	0.2	$	294.6	$	0.2
	-1	Securities purchased under agreement to resell represent an amount due under a collateralized transaction on a related consolidated entity, which is eliminated in consolidation.
	-2	Approximately $37.9 million and $66.5 million of the secured financing represents an amount held by us in inventory and is eliminated in consolidation at August 31, 2014 and November 30, 2013, respectively.
Variable Interest Entity Not Primary Beneficiary [Member]	'
Variable Interests in Non-Consolidated Variable Interest Entities	'
	The following tables present information about our variable interests in nonconsolidated VIEs. (in millions).
			August 31, 2014
			Carrying Amount				Maximum
			Assets		Liabilities		Exposure to loss		VIE Assets
	Collateralized loan obligations		$	51	$	0.1	$	245	$	4,897.50
	Consumer loan financing vehicles			133.6		—		367.5		261.8
	Asset management vehicle (1)			3.6		—		3.6		310.1
	Private equity vehicles (1)			47.2		—		62.1		98.8
	Total		$	235.4	$	0.1	$	678.2	$	5,568.20
			November 30, 2013
			Carrying Amount				Maximum
			Assets		Liabilities		Exposure to loss		VIE Assets
	Collateralized loan obligations		$	11.9	$	0.2	$	88.8	$	1,122.30
	Asset management vehicle (1)			3.5		—		3.5		454.2
	Private equity vehicles (1)			40.8		—		68.8		89.4
	Total		$	56.2	$	0.2	$	161.1	$	1,665.90
	-1	Assets consist of equity interests, which are included within Investments in managed funds.

Investments_Tables

Investments (Tables)	9 Months Ended
	Aug. 31, 2014
Jefferies Finance, LLC [Member]	'
Summary of Selected Financial Information	'
	The following is a summary of selected financial information for Jefferies Finance (in millions):
		August 31,		November 30,
		2014		2013
	Total assets	$	5,109.70	$	3,271.90
	Total liabilities		4,389.70		2,597.00
	Total equity		720		674.9
	Our total equity balance		360		337.3
Jefferies LoanCore, LLC [Member]	'
Summary of Selected Financial Information	'
	The following is a summary of selected financial information for Jefferies LoanCore (in millions):
		August 31,		November 30,
		2014		2013
	Total assets	$	1,319.70	$	974.9
	Total liabilities		804.7		507.9
	Total equity		515		467
	Our total equity balance		249.8		226.5
Knight Capital Group, Inc. [Member]	'
Summary of Selected Financial Information	'
	The following is a summary of selected financial information for Knight at June 30, 2014, the most recently available public financial information for the company (in millions):
		June 30,
		2014
	Total assets	$	7,662.50
	Total liabilities		6,128.80
	Total equity		1,533.70

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Aug. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Goodwill Resulting from Leucadia Transaction Attributable to Reportable Segments and Summary of Changes to Goodwill	'
	Goodwill resulting from the Leucadia Transaction attributed to our reportable segments are as follows (in thousands):
			August 31, 2014			November 30, 2013
	Capital Markets		$	1,718,519		$	1,717,246
	Asset Management			5,100			5,100
	Total goodwill		$	1,723,619		$	1,722,346
	The following table is a summary of the changes to goodwill for the three and nine months ended August 31, 2014, the nine months ended November 30, 2013 and the three months ended February 28, 2013 (in thousands):
			Successor											Predecessor
			Three Months Ended			Nine Months Ended			Nine Months Ended					Three Months Ended
			August 31, 2014			August 31, 2014			November 30, 2013					February 28, 2013
	Balance, at beginning of period		$	1,725,117		$	1,722,346		$	1,720,380				$	365,670
	Less: Disposal			—			—			(5,700	)(1)				—
	Add: Contingent consideration			—			—			—					2,394	(2)
	Add: Translation adjustments			(1,498	)		1,273			7,666					(1,287	)
	Balance, at end of period		$	1,723,619		$	1,723,619		$	1,722,346				$	366,777	(3)
	-1	As a result of a restructuring of our ownership interest in the commodities asset management business, we no longer hold a controlling interest and accordingly do not consolidate this business. In addition, we sold Jefferies International Management Limited to Leucadia. Goodwill associated with these entities was included in the net assets disposed of in the transactions.
	-2	Contingent consideration recorded during the three months ended February 28, 2013 relates to the lapse of certain conditions as specified in the purchase agreements associated with an acquisition in 2007.
	-3	Predecessor Company goodwill at February 28, 2013 was reduced to $-0- at March 1, 2013, as a result of purchase accounting adjustments.
Summary of Intangible Assets	'
	The following tables present the gross carrying amount, impairment losses, accumulated amortization, net carrying amount and weighted average amortization period of identifiable intangible assets at August 31, 2014 and November 30, 2013 (in thousands):
			August 31, 2014											Weighted
														average
														remaining
			Gross cost			Impairment			Accumulated			Net carrying		lives (years)
						losses			amortization			amount
	Customer relationships		$	136,956		$	—		$	(24,310	)	$	112,646		14.1
	Trade name			133,203			—			(5,864	)		127,339		33.5
	Exchange and clearing organization membership interests and registrations			14,930			(178	)		—			14,752		N/A
			$	285,089		$	(178	)	$	(30,174	)	$	254,737
			30-Nov-13											Weighted
														average
														remaining
			Gross cost			Impairment			Accumulated			Net carrying		lives (years)
						losses			amortization			amount
	Customer relationships		$	136,740		$	—		$	(17,567	)	$	119,173		14.8
	Trade name			132,967			—			(2,966	)		130,001		34.3
	Exchange and clearing organization membership interests and registrations			15,294			(378	)		—			14,916		N/A
			$	285,001		$	(378	)	$	(20,533	)	$	264,090
Future Amortization Expense Related to Intangible Assets	'
	The estimated future amortization expense for the five succeeding fiscal years are as follows (in thousands):
	Remainder of fiscal 2014		$	3,167
	Year ended November 30, 2015			12,668
	Year ended November 30, 2016			12,668
	Year ended November 30, 2017			12,668
	Year ended November 30, 2018			12,668

LongTerm_Debt_Tables

Long-Term Debt (Tables)	9 Months Ended
	Aug. 31, 2014
Debt Disclosure [Abstract]	'
Summary of Long-Term Debt Carrying Values Including Unamortized Discounts and Premiums	'
	The following summarizes our long-term debt carrying values (including unamortized discounts and premiums and valuation adjustment, where applicable) at August 31, 2014 and November 30, 2013 (in thousands):
			August 31,		November 30,
			2014		2013
	Unsecured Long-Term Debt
	5.875% Senior Notes, due June 8, 2014 (effective interest rate of 1.51%)		$	—	$	255,676
	3.875% Senior Notes, due November 9, 2015 (effective interest rate of 2.17%)			510,026		516,204
	5.5% Senior Notes, due March 15, 2016 (effective interest rate of 2.52%)			365,739		373,178
	5.125% Senior Notes, due April 13, 2018 (effective interest rate of 3.46%)			845,310		854,011
	8.5% Senior Notes, due July 15, 2019 (effective interest rate of 4.00%)			839,300		858,425
	2.375% Euro Medium Term Notes, due May 20, 2020 (effective rate of 2.42%)			655,129		—
	6.875% Senior Notes, due April 15, 2021 (effective interest rate of 4.40%)			856,575		866,801
	2.25% Euro Medium Term Notes, due July 13, 2022 (effective rate of 4.08%)			4,605		4,792
	5.125% Senior Notes, due January 20, 2023 (effective interest rate of 4.55%)			623,900		625,626
	6.45% Senior Debentures, due June 8, 2027 (effective interest rate of 5.46%)			381,951		383,224
	3.875% Convertible Senior Debentures, due November 1, 2029 (effective interest rate of 3.50%) (1)			350,288		359,281
	6.25% Senior Debentures, due January 15, 2036 (effective interest rate of 6.03%)			513,122		513,343
	6.50% Senior Notes, due January 20, 2043 (effective interest rate of 6.09%)			422,033		422,245
			$	6,367,978	$	6,032,806
	Secured Long-Term Debt
	Credit facility (2)			258,000		200,000
			$	6,625,978	$	6,232,806
	-1	As a result of the transaction with Leucadia on March 1, 2013, the value of the 3.875% Convertible Senior debentures at August 31, 2014 and November 30, 2013, includes the fair value of the conversion feature of $1.4 million and $9.6 million, respectively. The change in fair value of the conversion feature is included within Revenues—Principal transactions in the Consolidated Statement of Earnings and amounted to a gain of $2.4 million and a gain of $8.1 million for the three and nine months ended August 31, 2014, respectively, and a gain of $16.3 million and $9.2 million for the three and six months ended August 31, 2013, respectively.
	-2	On June 26, 2014, we amended and restated the Credit Facility due August 26, 2014 to extend the terms until June 26, 2017.

Noncontrolling_Interests_and_M1

Noncontrolling Interests and Mandatorily Redeemable Preferred Interests of Consolidated Subsidiaries (Tables)	9 Months Ended
	Aug. 31, 2014
Noncontrolling Interest [Abstract]	'
Noncontrolling Interests	'
	Noncontrolling interests represent equity interests in consolidated subsidiaries, comprised primarily of asset management entities and investment vehicles set up for the benefit of our employees, that are not attributable, either directly or indirectly, to us (i.e., minority interests). The following table presents noncontrolling interests at August 31, 2014 and November 30, 2013 (in thousands):
			August 31,		November 30,
			2014		2013
	Jefferies Structured Alpha Fund B, LLC (1)		$	—	$	115,958
	Global Equity Event Opportunity Fund, LLC (2)			25,787		—
	Other			5,422		1,196
	Noncontrolling interests		$	31,209	$	117,154
	-1	During the first quarter of 2014, the Jefferies Structured Alpha Fund B. LLC was deconsolidated due to substantive investments in the entity by third parties. No gain or loss was recognized upon deconsolidation. At November 30, 2013, noncontrolling interests included $75.0 million invested by Leucadia.
	-2	At August 31, 2014, all noncontrolling interests are attributed to Leucadia.

Benefit_Plans_Tables

Benefit Plans (Tables)	9 Months Ended
	Aug. 31, 2014
Components of Net Periodic Pension (Benefit) Cost	'
	The components of net periodic pension (benefit)/cost for our pension plans are as follows (in thousands):
		Successor												Predecessor
	U.S. Pension Plan	Three Months			Nine Months			Three Months			Six Months			Three Months
		Ended			Ended			Ended			Ended			Ended
		August 31,			August 31,			August 31,			August 31,			February 28,
		2014			2014			2013			2013			2013
	Components of net periodic pension (income) cost:
	Service cost	$	56		$	168		$	56		$	112		$	56
	Interest cost on projected benefit obligation		607			1,821			557			1,114			529
	Expected return on plan assets		(789	)		(2,367	)		(680	)		(1,360	)		(665	)
	Net amortization		(36	)		(108	)		—			—			300
	Net periodic pension (income)/cost	$	(162	)	$	(486	)	$	(67	)	$	(134	)	$	220
German Pension Plan [Member]	'
Components of Net Periodic Pension (Benefit) Cost	'
		Successor												Predecessor
	German Pension Plan	Three Months			Nine Months			Three Months			Six Months			Three Months
		Ended			Ended			Ended			Ended			Ended
		August 31,			August 31,			August 31,			August 31,			February 28,
		2014			2014			2013			2013			2013
	Components of net periodic pension cost:
	Service cost	$	11		$	33		$	16		$	32		$	16
	Interest cost on projected benefit obligation		216			658			220			433			220
	Net amortization		61			186			45			89			45
	Net periodic pension cost	$	288		$	877		$	281		$	554		$	281

Earnings_per_Share_Tables

Earnings per Share (Tables)	9 Months Ended
	Aug. 31, 2014
Earnings Per Share [Abstract]	'
Basic and Diluted Earnings per Common Share	'
	The following is a reconciliation of the numerators and denominators of the Basic and Diluted earnings per common share computations for the three months ended February 28, 2013 (in thousands, except per share amounts):
			Predecessor
			Three Months Ended
			February 28, 2013
	Earnings for basic earnings per common share:
	Net earnings		$	90,842
	Net earnings to noncontrolling interests			10,704
	Net earnings to common shareholders			80,138
	Less: Allocation of earnings to participating securities (1)			5,890
	Net earnings available to common shareholders		$	74,248
	Earnings for diluted earnings per common share:
	Net earnings		$	90,842
	Net earnings to noncontrolling interests			10,704
	Net earnings to common shareholders			80,138
	Add: Mandatorily redeemable convertible preferred stock dividends			1,016
	Less: Allocation of earnings to participating securities (1)			5,882
	Net earnings available to common shareholders		$	75,272
	Shares:
	Average common shares used in basic computation			213,732
	Stock options			2
	Mandatorily redeemable convertible preferred stock			4,110
	Convertible debt			—
	Average common shares used in diluted computation			217,844
	Earnings per common share:
	Basic		$	0.35
	Diluted		$	0.35
	-1	Represents dividends declared during the period on participating securities plus an allocation of undistributed earnings to participating securities. Net losses are not allocated to participating securities. Participating securities represent restricted stock and restricted stock units for which requisite service has not yet been rendered and amounted to weighted average shares of 16,756,000 for the three months ended February 28, 2013. Dividends declared on participating securities during the three months ended February 28, 2013 amounted to approximately $1.3 million. Undistributed earnings are allocated to participating securities based upon their right to share in earnings if all earnings for the period had been distributed.

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
	Aug. 31, 2014
Income Tax Disclosure [Abstract]	'
Earliest Tax Year Subject to Examination in the Major Tax Jurisdictions in which the Company Operates	'
	The table below summarizes the earliest tax years that remain subject to examination in the major tax jurisdictions in which we operate:
	Jurisdiction	Tax Year
	United States		2006
	United Kingdom		2012
	California		2006
	Connecticut		2006
	Massachusetts		2010
	New Jersey		2007
	New York State		2001
	New York City		2003

Commitments_Contingencies_and_1

Commitments, Contingencies and Guarantees (Tables)	9 Months Ended
	Aug. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	The following table summarizes our commitments associated with our capital market and asset management business activities at August 31, 2014 (in millions):
			Expected Maturity Date
			2014		2015		2016		2018		2020		Maximum
							and		and		and		Payout
							2017		2019		Later
	Equity commitments (1)		$	1.6	$	7.6	$	0.9	$	—	$	355.7	$	365.8
	Loan commitments (1)			—		76.7		615.8		101.1		—		793.6
	Mortgage-related commitments			976.2		333		530.6		—		—		1,839.80
	Forward starting reverse repos and repos			1,975.30		—		—		—		—		1,975.30
	Other unfunded commitments (1)			—		79.5		—		—		23		102.5
			$	2,953.10	$	496.8	$	1,147.30	$	101.1	$	378.7	$	5,077.00
	-1	Equity, loan commitments and other unfunded commitments are presented by contractual maturity date. The amounts are however available on demand.
Credit Exposure from Loan Commitments	'
	The table below presents our credit exposure from our loan commitments, including funded amounts, summarized by period of expiration at August 31, 2014. Credit exposure is based on the external credit ratings of the underlyings or referenced assets of our loan commitments. Since commitments associated with these business activities may expire unused, they do not necessarily reflect the actual future cash funding requirements (in millions):
	Credit Ratings		2014		2015-2019		2020 and		Total		Corporate		Corporate
							Later		Corporate		Lending		Lending
									Lending		Exposure at Fair		Commitments (3)
									Exposure (1)		Value (2)
	Investment grade		$	—	$	55.2	$	—	$	55.2	$	—	$	55.2
	Non-investment grade.			—		88.8		—		88.8		15.6		73.2
	Unrated			1.5		830.4		—		831.9		166.7		665.2
	Total		$	1.5	$	974.4	$	—	$	975.9	$	182.3	$	793.6
	-1	Total corporate lending exposure represents the potential loss assuming the fair value of funded loans and lending commitments were zero.
	-2	The corporate lending exposure at fair value includes $196.9 million of funded loans included in Financial instruments owned—Loans and Loans to and investments in related parties, and a $14.6 million net liability related to lending commitments recorded in Financial instruments sold—Derivatives and Financial instruments owned—Derivatives in the Consolidated Statement of Financial Condition at August 31, 2014.
	-3	Represents the notional amount of unfunded lending commitments.
Guarantees	'
	The following table summarizes the notional amounts associated with our derivative contracts meeting the definition of a guarantee under U.S. GAAP at August 31, 2014 (in millions):
			Expected Maturity Date
	Guarantee Type:		2014		2015		2016		2018		2020		Notional/
							and		and		and Later		Maximum
							2017		2019				Payout
	Derivative contracts—non-credit related		$	55,067.00	$	12,274.70	$	349.4	$	1.1	$	521.5	$	68,213.70
	Written derivative contracts—credit related			—		—		9		—		1,541.50		1,550.50
	Total derivative contracts		$	55,067.00	$	12,274.70	$	358.4	$	1.1	$	2,063.00	$	69,764.20
External Credit Ratings of Underlying or Referenced Assets for Credit Related Derivatives Contracts	'
	At August 31, 2014 the external credit ratings of the underlyings or referenced assets for our credit related derivatives contracts (in millions):
			External Credit Rating
			AAA/		AA/Aa		A		BBB/		Below		Unrated		Notional/
			Aaa						Baa		Investment				Maximum
											Grade				Payout
	Credit related derivative contracts:
	Index credit default swaps		$	1,475.50	$	—	$	—	$	—	$	—	$	—	$	1,475.50
	Single name credit default swaps		$	—	$	—	$	10	$	52	$	13	$	—	$	75

Net_Capital_Requirements_Table

Net Capital Requirements (Tables)	9 Months Ended
	Aug. 31, 2014
Text Block [Abstract]	'
Net Capital, Adjusted and Excess Net Capital	'
	At August 31, 2014, Jefferies, Jefferies Execution and Jefferies Bache, LLC’s net capital, adjusted net capital, and excess net capital were as follows (in thousands):
		Net Capital		Excess Net Capital
	Jefferies	$	902,855	$	829,380
	Jefferies Execution		5,737		5,487
		Adjusted Net Capital		Excess Net Capital
	Jefferies Bache, LLC	$	187,645	$	84,003

Segment_Reporting_Tables

Segment Reporting (Tables)	9 Months Ended
	Aug. 31, 2014
Segment Reporting [Abstract]	'
Net Revenues, Expenses and Total Assets by Segment	'
	Our net revenues and expenses by segment are summarized below (in millions):
			Successor								Predecessor
			Three Months Ended		Nine Months Ended		Three Months Ended		Six Months Ended		Three Months Ended
			August 31, 2014		August 31, 2014		August 31, 2013		August 31, 2013		February 28, 2013
	Capital Markets:
	Net revenues		$	828.5	$	2,423.20	$	515.3	$	1,149.90	$	807.6
	Expenses		$	697.8	$	2,020.60	$	500.1	$	1,077.50	$	660.6
	Asset Management:
	Net revenues		$	14.8	$	42.1	$	16.4	$	40.2	$	10.9
	Expenses		$	9.9	$	27.7	$	8.2	$	20.6	$	7.5
	Total:
	Net revenues		$	843.3	$	2,465.30	$	531.7	$	1,190.10	$	818.5
	Expenses		$	707.7	$	2,048.30	$	508.3	$	1,098.10	$	668.1
	The following table summarizes our total assets by segment at August 31, 2014 and November 30, 2013 (in millions):
			August 31, 2014		November 30, 2013
	Segment assets:
	Capital Markets		$	44,208.20	$	39,276.80
	Asset Management			555.9		900.2
	Total assets			44,764.10		40,177.00
Net Revenues by Geographic Region	'
	Net revenues by geographic region were as follows (in thousands):
											Predecessor
			Three Months Ended		Nine Months Ended		Three Months Ended		Six Months Ended		Three Months Ended
			August 31, 2014		August 31, 2014		August 31, 2013		August 31, 2013		February 28, 2013
	Americas (1)		$	661,738	$	1,893,723	$	362,240	$	884,386	$	663,588
	Europe (2)			153,455		500,229		159,739		276,782		133,104
	Asia			28,116		71,377		9,716		28,965		21,852
	Net revenues		$	843,309	$	2,465,329	$	531,695	$	1,190,133	$	818,544
	-1	Substantially all relates to U.S. results.
	-2	Substantially all relates to U.K. results.

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	9 Months Ended
	Aug. 31, 2014
Related Party Transactions [Abstract]	'
Summary of Interest Income, Other Revenues and Investment Income Attributable to Related Party Private Equity Funds	'
	The following table presents interest income earned on loans to Private Equity Related Funds and other revenues and investment income related to net gains and losses on our investment in Private Equity Related Funds (in thousands):
		Successor									Predecessor
		Three Months Ended		Nine Months Ended			Three Months Ended		Six Months Ended		Three Months Ended
		August 31, 2014		August 31, 2014			August 31, 2013		August 31, 2013		February 28, 2013
	Interest income	$	—	$	—		$	339	$	837	$	516
	Other revenues and investment (loss) income		371		(11,088	)		4,005		3,031		947

Organization_and_Basis_of_Pres1

Organization and Basis of Presentation - Additional Information (Detail) (USD $)	0 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Nov. 30, 2013	Aug. 31, 2014	Feb. 28, 2013	Aug. 31, 2014	Aug. 31, 2014	Aug. 31, 2014
		Segment	Leucadia [Member]	Leucadia [Member]	3.875% Convertible Senior Debentures due 2029 [Member]	3.875% Convertible Senior Debentures due 2029 [Member]
				Preferred Stock Subject to Mandatory Redemption [Member]		Leucadia [Member]
Organization And Basis Of Presentation [Line Items]	'	'	'	'	'	'
Number of shares of Leucadia common stock received for each share of Jefferies common stock	'	0.81	'	'	'	'
Convertible Senior Debentures, interest rate	'	'	'	'	3.88%	3.88%
Convertible Senior Debentures, due date	'	'	'	'	'	'2029
Dividend of Series A Convertible Preferred Stock	'	'	3.25%	3.25%	'	'
Number of operating segments	'	2	'	'	'	'
Decrease in Receivables from customers	$88.70	'	'	'	'	'
Decrease in Payables to customers	$39.40	'	'	'	'	'

Summary_of_Significant_Account2

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Aug. 31, 2014
Summary Of Significant Accounting Policies [Line Items]	'
Percentage of tax benefit realized upon ultimate settlement with taxing authority	50.00%
Investigation reserve	$3.10
Minimum [Member]	'
Summary Of Significant Accounting Policies [Line Items]	'
Useful life of premises and equipment	'3 years
Maximum [Member]	'
Summary Of Significant Accounting Policies [Line Items]	'
Useful life of premises and equipment	'10 years

Leucadia_and_Related_Transacti2

Leucadia and Related Transactions - Additional Information (Detail) (USD $)	3 Months Ended			0 Months Ended	3 Months Ended				9 Months Ended	1 Months Ended	3 Months Ended
	Feb. 28, 2013	Feb. 28, 2013	Aug. 31, 2014	Mar. 31, 2013	Feb. 28, 2013	31-May-13	Feb. 28, 2013	Feb. 28, 2013	Aug. 31, 2014	Feb. 28, 2013	Feb. 28, 2013
	3.25% Cumulative Convertible Preferred Shares [Member]	Series A-1 Convertible Cumulative Preferred Stock [Member]	3.875% Convertible Senior Debentures due 2029 [Member]	Leucadia [Member]	Leucadia [Member]	Leucadia [Member]	Leucadia [Member]	Leucadia [Member]	Leucadia [Member]	Jefferies High Yield Holdings, LLC [Member]	Jefferies Group Inc. [Member]
						Predecessor [Member]	Predecessor [Member]	3.25% Cumulative Convertible Preferred Shares [Member]	3.875% Convertible Senior Debentures due 2029 [Member]		Series A-1 Convertible Cumulative Preferred Stock [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Exchange ratio	'	'	'	'	0.81	'	'	'	'	'	'
Convertible Cumulative Preferred Stock	'	'	'	'	$125,000,000	'	'	$125,000,000	'	'	$125,000,000
Convertible Cumulative Preferred Stock, dividend rate	3.25%	3.25%	'	'	3.25%	'	'	3.25%	'	'	3.25%
Debt instrument principal amount	'	'	'	'	'	'	'	'	345,000,000	'	'
Debt instrument interest rate	'	'	3.88%	'	'	'	'	'	3.88%	'	'
Debt instrument maturity year	'	'	'	'	'	'	'	'	'2029	'	'
Cost of assets acquired	'	'	'	'	4,754,101,000	'	'	'	'	'	'
Business acquisition transaction cost	'	'	'	'	'	9,000,000	2,100,000	'	'	'	'
Goodwill	'	'	'	'	1,720,380,000	'	'	'	'	'	'
Third party noncontrolling interests redeemed	'	'	'	'	'	'	'	'	'	347,600,000	'
Redeemable preferred interests	'	'	'	$362,300,000	'	'	'	'	'	'	'

Leucadia_and_Related_Transacti3

Leucadia and Related Transactions - Summary Computation of Purchase Price and Fair Values Assigned to Assets and Liabilities (Detail) (Leucadia [Member], USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Feb. 28, 2013
Leucadia [Member]	'
Business Acquisition [Line Items]	'
Jefferies common stock outstanding	205,368,031
Less: Jefferies common stock owned by Leucadia	-58,006,024
Jefferies common stock acquired by Leucadia	147,362,007
Exchange ratio	0.81
Leucadia's shares issued (excluding for Jefferies shares held by Leucadia)	119,363,226
Less: restricted shares issued for share-based payment awards	-6,894,856
Leucadia's shares issued, excluding share-based payment awards	112,468,370
Closing price of Leucadia's common stock	$26.90
Fair value of common shares acquired by Leucadia	$3,025,399
Fair value of 3.25% cumulative convertible preferred shares	125,000
Fair value of shares-based payment awards	343,811
Fair value of Jefferies shares owned by Leucadia	1,259,891
Total purchase price	$4,754,101

Leucadia_and_Related_Transacti4

Leucadia and Related Transactions - Summary Computation of Purchase Price and Fair Values Assigned to Assets and Liabilities (Parenthetical) (Detail) (USD $)	3 Months Ended
	Feb. 28, 2013
Leucadia [Member]	'
Business Acquisition [Line Items]	'
Convertible Cumulative Preferred Stock, dividend rate	3.25%
Closing price common stock	$21.72
3.25% Cumulative Convertible Preferred Shares [Member]	'
Business Acquisition [Line Items]	'
Convertible Cumulative Preferred Stock, dividend rate	3.25%
3.25% Cumulative Convertible Preferred Shares [Member] | Leucadia [Member]	'
Business Acquisition [Line Items]	'
Convertible Cumulative Preferred Stock, dividend rate	3.25%
Series A-1 Convertible Cumulative Preferred Stock [Member]	'
Business Acquisition [Line Items]	'
Convertible Cumulative Preferred Stock, dividend rate	3.25%

Leucadia_and_Related_Transacti5

Leucadia and Related Transactions - Assets Acquired and Liabilities Assumed by Major Class (Detail) (Leucadia [Member], USD $)	Feb. 28, 2013
In Thousands, unless otherwise specified
Assets acquired:	'
Cash and cash equivalents	$3,017,958
Cash and securities segregated	3,728,742
Financial instruments owned, at fair value	16,413,535
Investments in managed funds	59,976
Loans to and investments in related parties	766,893
Securities borrowed	5,315,488
Securities purchased under agreements to resell	3,578,366
Securities received as collateral	25,338
Brokers, dealers and clearing organizations	2,444,085
Customers	1,045,251
Fees, interest and other	225,555
Premises and equipment	192,603
Indefinite-lived intangible exchange memberships and licenses	15,551
Other assets	939,600
Total assets	38,036,242
Liabilities assumed:	'
Short-term borrowings	100,000
Financial instruments sold, not yet purchased, at fair value	9,766,876
Securities loaned	1,902,687
Securities sold under agreements to repurchase	7,976,492
Other secured financings	122,294
Obligation to return securities received as collateral	25,338
Brokers, dealers and clearing organizations	1,787,055
Customers	5,450,781
Accrued expenses and other liabilities	793,843
Long-term debt	6,362,024
Mandatorily redeemable preferred interests	358,951
Total liabilities	34,646,341
Noncontrolling interests	356,180
Fair value of net assets acquired, excluding goodwill	3,033,721
Goodwill	1,720,380
Customer relationships [Member]	'
Assets acquired:	'
Finite-lived intangible assets	136,002
Trade name [Member]	'
Assets acquired:	'
Finite-lived intangible assets	$131,299

Fair_Value_Disclosures_Financi

Fair Value Disclosures - Financial Assets and Liabilities Accounted for at Fair Value on Recurring Basis (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Thousands, unless otherwise specified
Financial instruments owned:	'	'
Corporate equity securities	$2,688,105	$2,098,597
Corporate debt securities	3,330,959	2,982,768
Collateralized debt obligations	302,182	219,311
U.S. government and federal agency securities	3,485,625	2,333,610
Municipal securities	468,656	664,054
Sovereign obligations	2,411,250	2,348,488
Loans and other receivables	1,607,130	1,349,128
Derivatives	358,675	261,093
Investments at fair value	121,928	101,282
Physical commodities	63,831	37,888
Total financial instruments owned	18,420,173	16,650,043
Cash and cash equivalents	4,035,239	3,561,119
Investments in managed funds	77,881	57,285
Cash and securities segregated and on deposit for regulatory purposes	3,301,185	3,616,602
Securities received as collateral	8,326	11,063
Total Level 3 assets	'	'
Financial instruments sold, not yet purchased:	'	'
Corporate equity securities	1,816,070	1,823,299
Corporate debt securities	1,618,068	1,346,078
Collateralized debt obligations	500	'
U.S. government and federal agency securities	2,851,698	1,324,326
Municipal securities	'	'
Sovereign obligations	2,281,407	1,831,357
Loans	832,419	695,300
Derivatives	267,005	180,079
Physical commodities	52,966	36,483
Total financial instruments sold, not yet purchased	9,723,247	7,271,613
Obligation to return securities received as collateral	8,326	11,063
Other secured financings	31,666	39,711
Embedded conversion option	1,432	9,574
Residential mortgage-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	2,537,646	3,037,760
Financial instruments sold, not yet purchased:	'	'
Mortgage- and asset-backed securities, liabilities	3,114	34,691
Commercial mortgage-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	961,551	1,147,978
Other asset-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	82,635	68,086
Level 1 [Member]	'	'
Financial instruments owned:	'	'
Corporate equity securities	2,343,374	1,913,220
Corporate debt securities	'	'
Collateralized debt obligations	'	'
U.S. government and federal agency securities	3,375,064	2,293,221
Municipal securities	'	'
Sovereign obligations	1,570,726	1,458,803
Loans and other receivables	'	'
Derivatives	91,950	40,952
Investments at fair value	'	'
Physical commodities	'	'
Total financial instruments owned	7,381,114	5,706,196
Cash and cash equivalents	4,035,239	3,561,119
Investments in managed funds	'	'
Cash and securities segregated and on deposit for regulatory purposes	3,301,185	3,616,602
Securities received as collateral	8,326	11,063
Total Level 3 assets	'	'
Financial instruments sold, not yet purchased:	'	'
Corporate equity securities	1,749,610	1,782,903
Corporate debt securities	'	'
Collateralized debt obligations	'	'
U.S. government and federal agency securities	2,851,698	1,324,326
Municipal securities	'	'
Sovereign obligations	1,457,265	1,360,269
Loans	'	'
Derivatives	230,856	43,829
Physical commodities	'	'
Total financial instruments sold, not yet purchased	6,289,429	4,511,327
Obligation to return securities received as collateral	8,326	11,063
Other secured financings	'	'
Embedded conversion option	'	'
Level 1 [Member] | Residential mortgage-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	'	'
Financial instruments sold, not yet purchased:	'	'
Mortgage- and asset-backed securities, liabilities	'	'
Level 1 [Member] | Commercial mortgage-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	'	'
Level 1 [Member] | Other asset-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	'	'
Level 2 [Member]	'	'
Financial instruments owned:	'	'
Corporate equity securities	336,954	175,493
Corporate debt securities	3,294,075	2,957,102
Collateralized debt obligations	258,442	182,095
U.S. government and federal agency securities	108,067	40,389
Municipal securities	468,656	664,054
Sovereign obligations	840,524	889,685
Loans and other receivables	1,419,105	1,203,238
Derivatives	3,378,352	2,472,237
Investments at fair value	5,541	40
Physical commodities	63,831	37,888
Total financial instruments owned	13,652,939	12,740,374
Cash and cash equivalents	'	'
Investments in managed funds	19,559	'
Cash and securities segregated and on deposit for regulatory purposes	'	'
Securities received as collateral	'	'
Total Level 3 assets	'	'
Financial instruments sold, not yet purchased:	'	'
Corporate equity securities	66,422	40,358
Corporate debt securities	1,617,826	1,346,078
Collateralized debt obligations	500	'
U.S. government and federal agency securities	'	'
Municipal securities	'	'
Sovereign obligations	824,142	471,088
Loans	825,758	672,838
Derivatives	3,125,513	2,480,463
Physical commodities	52,966	36,483
Total financial instruments sold, not yet purchased	6,516,241	5,081,999
Obligation to return securities received as collateral	'	'
Other secured financings	'	31,000
Embedded conversion option	'	'
Level 2 [Member] | Residential mortgage-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	2,456,612	2,932,268
Financial instruments sold, not yet purchased:	'	'
Mortgage- and asset-backed securities, liabilities	3,114	34,691
Level 2 [Member] | Commercial mortgage-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	942,224	1,130,410
Level 2 [Member] | Other asset-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	80,556	55,475
Level 3 [Member]	'	'
Financial instruments owned:	'	'
Corporate equity securities	7,777	9,884
Corporate debt securities	36,884	25,666
Collateralized debt obligations	43,740	37,216
U.S. government and federal agency securities	2,494	'
Municipal securities	'	'
Sovereign obligations	'	'
Loans and other receivables	188,025	145,890
Derivatives	1,204	1,493
Investments at fair value	116,387	101,242
Physical commodities	'	'
Total financial instruments owned	498,951	457,062
Level 3 financial instruments for which the firm does not bear economic exposure	-18,948	'
Level 3 financial instruments for which the firm bears economic exposure	480,003	457,062
Cash and cash equivalents	'	'
Investments in managed funds	58,322	57,285
Cash and securities segregated and on deposit for regulatory purposes	'	'
Securities received as collateral	'	'
Total Level 3 assets	538,325	514,347
Financial instruments sold, not yet purchased:	'	'
Corporate equity securities	38	38
Corporate debt securities	242	'
Collateralized debt obligations	'	'
U.S. government and federal agency securities	'	'
Municipal securities	'	'
Sovereign obligations	'	'
Loans	6,661	22,462
Derivatives	14,784	8,398
Physical commodities	'	'
Total financial instruments sold, not yet purchased	21,725	30,898
Obligation to return securities received as collateral	'	'
Other secured financings	31,666	8,711
Embedded conversion option	1,432	9,574
Level 3 [Member] | Residential mortgage-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	81,034	105,492
Financial instruments sold, not yet purchased:	'	'
Mortgage- and asset-backed securities, liabilities	'	'
Level 3 [Member] | Commercial mortgage-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	19,327	17,568
Level 3 [Member] | Other asset-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	2,079	12,611
Counterparty and Cash Collateral Netting [Member]	'	'
Financial instruments owned:	'	'
Corporate equity securities	'	'
Corporate debt securities	'	'
Collateralized debt obligations	'	'
U.S. government and federal agency securities	'	'
Municipal securities	'	'
Sovereign obligations	'	'
Loans and other receivables	'	'
Derivatives	-3,112,831	-2,253,589
Investments at fair value	'	'
Physical commodities	'	'
Total financial instruments owned	-3,112,831	-2,253,589
Cash and cash equivalents	'	'
Investments in managed funds	'	'
Cash and securities segregated and on deposit for regulatory purposes	'	'
Securities received as collateral	'	'
Total Level 3 assets	'	'
Financial instruments sold, not yet purchased:	'	'
Corporate equity securities	'	'
Corporate debt securities	'	'
Collateralized debt obligations	'	'
U.S. government and federal agency securities	'	'
Municipal securities	'	'
Sovereign obligations	'	'
Loans	'	'
Derivatives	-3,104,148	-2,352,611
Physical commodities	'	'
Total financial instruments sold, not yet purchased	-3,104,148	-2,352,611
Obligation to return securities received as collateral	'	'
Other secured financings	'	'
Embedded conversion option	'	'
Counterparty and Cash Collateral Netting [Member] | Residential mortgage-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	'	'
Financial instruments sold, not yet purchased:	'	'
Mortgage- and asset-backed securities, liabilities	'	'
Counterparty and Cash Collateral Netting [Member] | Commercial mortgage-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	'	'
Counterparty and Cash Collateral Netting [Member] | Other asset-backed securities [Member]	'	'
Financial instruments owned:	'	'
Mortgage- and asset-backed securities, assets	'	'

Fair_Value_Disclosures_Financi1

Fair Value Disclosures - Financial Assets and Liabilities Accounted for at Fair Value on Recurring Basis (Parenthetical) (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Millions, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
U.S. government securities at fair value segregated for regulatory purposes	$564.30	$304.20
Fair value of equity options transferred from Level 1 to Level 2 within Financial instruments owned	0	403
Fair value of equity options transferred from Level 1 to Level 2 within Financial instruments sold, not yet purchased	$0	$423

Fair_Value_Disclosures_Investm

Fair Value Disclosures - Investments Measured at Fair Value Based on Net Asset Value Per Share (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2014	Nov. 30, 2013
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair Value	$112,818	$91,633
Unfunded Commitments	26,117	40,910
Equity Long/Short Hedge Funds [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair Value	39,452	20,927
Unfunded Commitments	'	'
Redemption Frequency (if currently eligible)	'Monthly, Quarterly	'Monthly, Quarterly
High Yield Hedge Funds [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair Value	210	244
Unfunded Commitments	'	'
Redemption Frequency (if currently eligible)	'	'
Fund of Funds [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair Value	334	494
Unfunded Commitments	94	94
Redemption Frequency (if currently eligible)	'	'
Equity Funds [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair Value	69,232	66,495
Unfunded Commitments	26,023	40,816
Redemption Frequency (if currently eligible)	'	'
Convertible Bond Funds [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair Value	3,590	3,473
Unfunded Commitments	'	'
Redemption Frequency (if currently eligible)	'At Will	'At Will

Fair_Value_Disclosures_Investm1

Fair Value Disclosures - Investments Measured at Fair Value Based on Net Asset Value Per Share (Parenthetical) (Detail) (USD $)	9 Months Ended
	Aug. 31, 2014	Nov. 30, 2013
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Unfunded Commitments	$26,117,000	$40,910,000
Investments, at fair value	121,928,000	101,282,000
Equity Long/Short Hedge Funds [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Percentage of redeemable investments	99.00%	98.00%
Notice period redemption of investment prior written notice period	'30-65 days	'
Fair value of investments in equity funds	16,000,000	'
Unfunded Commitments	'	'
Fund of Funds [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Percentage of investments with no redemption provisions	96.00%	98.00%
Estimated period for the liquidation of the underlying assets, Maximum	'2 years	'
Unfunded Commitments	94,000	94,000
Private equity funds [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Estimated period for the liquidation of the underlying assets, Maximum	'8 years	'
Percentage of investments at fair value expected to liquidate	99.00%	99.00%
Estimated period for the liquidation of the underlying assets, Minimum	'1 year	'
Equity Funds [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Fair value of investments in equity funds	58,800,000	54,400,000
Unfunded Commitments	24,400,000	39,200,000
Convertible bonds [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Redeemable period of investments	'5 days	'
Investments which are not investment companies [Member]	'	'
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]	'	'
Investments, at fair value	$87,000,000	$66,900,000

Fair_Value_Disclosures_Additio

Fair Value Disclosures - Additional Information (Detail) (USD $)	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Feb. 28, 2013	Aug. 31, 2013	Aug. 31, 2014	Nov. 30, 2013
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Other secured financings	$616,666,000	'	'	'	$616,666,000	$234,711,000
Transfers of assets from Level 2 to Level 3	87,800,000	91,400,000	100,500,000	53,600,000	79,400,000	'
Transfers of assets from Level 3 to Level 2	108,600,000	82,700,000	112,700,000	48,500,000	71,800,000	'
Transfers of liabilities from Level 3 to Level 2	8,600,000	0	700,000	0	3,900,000	'
Net gains/losses on Level 3 assets (realized and unrealized)	4,800,000	1,000,000	14,500,000	12,700,000	12,300,000	'
Net gains/losses on Level 3 liabilities (realized and unrealized)	4,200,000	1,100,000	2,700,000	6,500,000	2,000,000	'
Transfers of liabilities from Level 2 to Level 3	'	0	0	0	'	'
Unadjusted net asset value of the funds	'	'	'	'	101,300,000	127,700,000
Unadjusted net liability value of the funds	'	'	'	'	6,700,000	14,400,000
Aggregate fair value of loans and other receivables	1,200,000	'	'	'	1,200,000	0
Loan and other receivables on nonaccrual status	305,600,000	'	'	'	305,600,000	0
Level 3 [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Other secured financings	12,700,000	'	'	'	12,700,000	'
Derivative liabilities [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Transfers of liabilities from Level 3 to Level 2	'	'	'	'	3,300,000	'
Corporate debt securities [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Transfers of assets from Level 2 to Level 3	'	5,600,000	10,800,000	8,500,000	'	'
Transfers of assets from Level 3 to Level 2	'	1,500,000	'	400,000	8,000,000	'
Corporate equity securities [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Transfers of assets from Level 2 to Level 3	'	8,300,000	100,000	7,000,000	'	'
Transfers of assets from Level 3 to Level 2	13,900,000	7,400,000	4,700,000	4,900,000	6,500,000	'
Investments in managed funds [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Transfers of assets from Level 3 to Level 2	'	'	'	'	3,500,000	'
Collateralized debt obligations [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Transfers of assets from Level 2 to Level 3	15,200,000	22,300,000	5,300,000	12,100,000	7,500,000	'
Transfers of assets from Level 3 to Level 2	5,300,000	1,600,000	2,400,000	2,200,000	1,300,000	'
Residential mortgage-backed securities [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Transfers of assets from Level 2 to Level 3	30,100,000	50,300,000	78,400,000	17,900,000	27,200,000	'
Transfers of assets from Level 3 to Level 2	12,500,000	40,600,000	73,500,000	29,700,000	23,100,000	'
Commercial mortgage-backed securities [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Transfers of assets from Level 2 to Level 3	6,800,000	2,400,000	1,300,000	5,300,000	4,600,000	'
Transfers of assets from Level 3 to Level 2	5,000,000	2,200,000	10,900,000	1,200,000	500,000	'
Other asset-backed securities [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Transfers of assets from Level 2 to Level 3	1,500,000	'	'	'	1,300,000	'
Transfers of assets from Level 3 to Level 2	38,600,000	'	200,000	'	3,500,000	'
Loans and other receivables [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Transfers of assets from Level 2 to Level 3	25,100,000	'	4,800,000	400,000	31,400,000	'
Transfers of assets from Level 3 to Level 2	25,100,000	23,600,000	19,900,000	9,500,000	18,000,000	'
Investments at fair value [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Transfers of assets from Level 2 to Level 3	5,400,000	'	'	'	6,500,000	'
Transfers of assets from Level 3 to Level 2	'	'	'	'	$7,400,000	'
3.875% Convertible Senior Debentures due 2029 [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Debt instrument interest rate	3.88%	'	'	'	3.88%	'
3.875% Convertible Senior Debentures due 2029 [Member] | Leucadia [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Debt instrument interest rate	3.88%	'	'	'	3.88%	'
Debt instrument maturity year	'	'	'	'	1-Nov-29	'
Volatility curve used in valuing embedded option	'	'	'	'	'252 days	'
Embedded conversion option [Member] | Leucadia [Member]	'	'	'	'	'	'
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]	'	'	'	'	'	'
Debt instrument maturity year	'	'	'	'	1-Nov-17	'

Fair_Value_Disclosures_Summary

Fair Value Disclosures - Summary of Valuation Bases (Pricing Information) for Financial Instruments (Detail)	Aug. 31, 2014	Nov. 30, 2013
Financial Instruments Owned And Sold Not Yet Purchased Measured Using Different Valuation Basis [Line Items]	'	'
Financial Instruments Owned	100.00%	100.00%
Financial Instruments Sold, Not Yet Purchased	100.00%	100.00%
Exchange closing prices [Member]	'	'
Financial Instruments Owned And Sold Not Yet Purchased Measured Using Different Valuation Basis [Line Items]	'	'
Financial Instruments Owned	13.00%	12.00%
Financial Instruments Sold, Not Yet Purchased	18.00%	25.00%
Recently observed transaction prices [Member]	'	'
Financial Instruments Owned And Sold Not Yet Purchased Measured Using Different Valuation Basis [Line Items]	'	'
Financial Instruments Owned	3.00%	5.00%
Financial Instruments Sold, Not Yet Purchased	3.00%	4.00%
External pricing services [Member]	'	'
Financial Instruments Owned And Sold Not Yet Purchased Measured Using Different Valuation Basis [Line Items]	'	'
Financial Instruments Owned	70.00%	68.00%
Financial Instruments Sold, Not Yet Purchased	72.00%	66.00%
Broker quotes [Member]	'	'
Financial Instruments Owned And Sold Not Yet Purchased Measured Using Different Valuation Basis [Line Items]	'	'
Financial Instruments Owned	4.00%	3.00%
Financial Instruments Sold, Not Yet Purchased	3.00%	3.00%
Valuation techniques [Member]	'	'
Financial Instruments Owned And Sold Not Yet Purchased Measured Using Different Valuation Basis [Line Items]	'	'
Financial Instruments Owned	10.00%	12.00%
Financial Instruments Sold, Not Yet Purchased	4.00%	2.00%

Fair_Value_Disclosures_Summary1

Fair Value Disclosures - Summary of Changes in Fair Value of Financial Assets Classified as Level 3 (Detail) (USD $)	3 Months Ended			6 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Feb. 28, 2013	Aug. 31, 2013	Aug. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Total gains/losses (realized and unrealized)	($4,800)	($1,000)	($14,500)	($12,700)	($12,300)
Successor [Member] | Corporate equity securities [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	16,402	19,577	'	13,234	9,884
Total gains/losses (realized and unrealized)	-480	-788	'	1,053	-1,528
Purchases	4,528	'	'	213	36,661
Sales	-529	-930	'	-753	-31,444
Settlements	'	'	'	266	'
Issuances	'	'	'	'	'
Net transfers into/ (out of) Level 3	-12,144	-1,780	'	2,066	-5,796
Ending Balance	7,777	16,079	'	16,079	7,777
Change in unrealized gains/(losses) relating to instruments still held	-286	-786	'	1,243	-400
Successor [Member] | Corporate debt securities [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	31,648	18,615	'	31,820	25,666
Total gains/losses (realized and unrealized)	5,454	-4,285	'	-17,415	10,727
Purchases	21,793	68	'	708	137,164
Sales	-15,713	-571	'	-2,556	-128,733
Settlements	-34	'	'	'	'
Issuances	'	'	'	'	'
Net transfers into/ (out of) Level 3	-6,264	6,806	'	8,076	-7,940
Ending Balance	36,884	20,633	'	20,633	36,884
Change in unrealized gains/(losses) relating to instruments still held	3,470	-4,342	'	-6,933	10,177
Successor [Member] | Collateralized debt obligations [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	42,313	40,084	'	24,736	37,216
Total gains/losses (realized and unrealized)	-845	-1,903	'	-2,008	5,198
Purchases	7,613	8,222	'	43,152	94,743
Sales	-15,204	-4,236	'	-27,676	-99,661
Settlements	'	'	'	'	'
Issuances	'	'	'	'	'
Net transfers into/ (out of) Level 3	9,863	-1,335	'	2,628	6,244
Ending Balance	43,740	40,832	'	40,832	43,740
Change in unrealized gains/(losses) relating to instruments still held	-1,575	-2,388	'	-3,830	-6,283
Successor [Member] | U.S. government and federal agency securities [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	'	'	'	'	'
Total gains/losses (realized and unrealized)	-11	'	'	'	-11
Purchases	2,505	'	'	'	2,505
Sales	'	'	'	'	'
Settlements	'	'	'	'	'
Issuances	'	'	'	'	'
Net transfers into/ (out of) Level 3	'	'	'	'	'
Ending Balance	2,494	'	'	'	2,494
Change in unrealized gains/(losses) relating to instruments still held	-11	'	'	'	-11
Successor [Member] | Residential mortgage-backed securities [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	71,962	143,766	'	169,426	105,492
Total gains/losses (realized and unrealized)	-2,557	-1,876	'	5,594	-6,974
Purchases	3,981	33,831	'	79,531	44,454
Sales	-9,635	-50,938	'	-105,671	-65,229
Settlements	-325	-2,306	'	-4,851	-812
Issuances	'	'	'	'	'
Net transfers into/ (out of) Level 3	17,608	9,706	'	-11,846	4,103
Ending Balance	81,034	132,183	'	132,183	81,034
Change in unrealized gains/(losses) relating to instruments still held	-302	-3,898	'	586	-3,564
Successor [Member] | Commercial mortgage-backed securities [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	24,246	16,068	'	17,794	17,568
Total gains/losses (realized and unrealized)	-256	2,033	'	-735	-3,120
Purchases	641	130	'	1,533	34,959
Sales	-7,068	-310	'	-3,054	-32,774
Settlements	'	-3,703	'	-5,281	-1,315
Issuances	'	'	'	'	'
Net transfers into/ (out of) Level 3	1,764	205	'	4,166	4,009
Ending Balance	19,327	14,423	'	14,423	19,327
Change in unrealized gains/(losses) relating to instruments still held	-832	-1,106	'	-5,007	-3,380
Successor [Member] | Other asset-backed securities [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	45,444	1,484	'	1,292	12,611
Total gains/losses (realized and unrealized)	1,272	2,170	'	2,168	256
Purchases	50,620	7,576	'	7,618	52,495
Sales	-49,411	-3,279	'	-3,127	-52,282
Settlements	-8,774	'	'	'	-8,804
Issuances	'	'	'	'	'
Net transfers into/ (out of) Level 3	-37,072	659	'	659	-2,197
Ending Balance	2,079	8,610	'	8,610	2,079
Change in unrealized gains/(losses) relating to instruments still held	-3	2,142	'	2,077	'
Successor [Member] | Loans and other receivables [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	138,643	117,496	'	170,986	145,890
Total gains/losses (realized and unrealized)	-8,074	-198	'	-5,103	-9,028
Purchases	194,387	52,246	'	206,672	247,383
Sales	-96,340	-12,139	'	-26,630	-147,851
Settlements	-40,617	-25,395	'	-213,662	-61,791
Issuances	'	'	'	'	'
Net transfers into/ (out of) Level 3	26	-1,558	'	-1,811	13,422
Ending Balance	188,025	130,452	'	130,452	188,025
Change in unrealized gains/(losses) relating to instruments still held	-7,967	609	'	-8,063	-8,961
Successor [Member] | Investments at fair value [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	118,071	81,364	'	75,067	101,242
Total gains/losses (realized and unrealized)	-4	1,848	'	653	27,264
Purchases	500	'	'	5,000	30,660
Sales	-7,232	-101	'	-102	-40,916
Settlements	-305	-710	'	-3,204	-945
Issuances	'	'	'	'	'
Net transfers into/ (out of) Level 3	5,357	-3,949	'	1,038	-918
Ending Balance	116,387	78,452	'	78,452	116,387
Change in unrealized gains/(losses) relating to instruments still held	105	2,002	'	668	12,775
Successor [Member] | Investments in managed funds [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	56,119	55,141	'	59,976	57,285
Total gains/losses (realized and unrealized)	734	4,034	'	3,108	-10,515
Purchases	1,469	6,598	'	9,130	14,875
Sales	'	'	'	'	'
Settlements	'	-9,876	'	-16,439	'
Issuances	'	'	'	'	'
Net transfers into/ (out of) Level 3	'	'	'	122	-3,323
Ending Balance	58,322	55,897	'	55,897	58,322
Change in unrealized gains/(losses) relating to instruments still held	734	4,034	'	3,108	-10,515
Predecessor [Member] | Corporate equity securities [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	'	'	16,815	'	'
Total gains/losses (realized and unrealized)	'	'	200	'	'
Purchases	'	'	707	'	'
Sales	'	'	109	'	'
Net transfers into/ (out of) Level 3	'	'	-4,597	'	'
Ending Balance	'	'	13,234	'	'
Change in unrealized gains/(losses) relating to instruments still held	'	'	172	'	'
Predecessor [Member] | Corporate debt securities [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	'	'	3,631	'	'
Total gains/losses (realized and unrealized)	'	'	7,836	'	'
Purchases	'	'	11,510	'	'
Sales	'	'	-1,918	'	'
Net transfers into/ (out of) Level 3	'	'	10,761	'	'
Ending Balance	'	'	31,820	'	'
Change in unrealized gains/(losses) relating to instruments still held	'	'	7,833	'	'
Predecessor [Member] | Collateralized debt obligations [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	'	'	31,255	'	'
Total gains/losses (realized and unrealized)	'	'	3,584	'	'
Purchases	'	'	4,406	'	'
Sales	'	'	-17,374	'	'
Net transfers into/ (out of) Level 3	'	'	2,865	'	'
Ending Balance	'	'	24,736	'	'
Change in unrealized gains/(losses) relating to instruments still held	'	'	-1,165	'	'
Predecessor [Member] | Residential mortgage-backed securities [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	'	'	156,069	'	'
Total gains/losses (realized and unrealized)	'	'	11,906	'	'
Purchases	'	'	132,773	'	'
Sales	'	'	-130,143	'	'
Settlements	'	'	-6,057	'	'
Net transfers into/ (out of) Level 3	'	'	4,878	'	'
Ending Balance	'	'	169,426	'	'
Change in unrealized gains/(losses) relating to instruments still held	'	'	4,511	'	'
Predecessor [Member] | Commercial mortgage-backed securities [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	'	'	30,202	'	'
Total gains/losses (realized and unrealized)	'	'	-995	'	'
Purchases	'	'	2,280	'	'
Sales	'	'	-2,866	'	'
Settlements	'	'	-1,188	'	'
Net transfers into/ (out of) Level 3	'	'	-9,639	'	'
Ending Balance	'	'	17,794	'	'
Change in unrealized gains/(losses) relating to instruments still held	'	'	-2,059	'	'
Predecessor [Member] | Other asset-backed securities [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	'	'	1,114	'	'
Total gains/losses (realized and unrealized)	'	'	90	'	'
Purchases	'	'	1,627	'	'
Sales	'	'	-1,342	'	'
Settlements	'	'	-19	'	'
Net transfers into/ (out of) Level 3	'	'	-178	'	'
Ending Balance	'	'	1,292	'	'
Change in unrealized gains/(losses) relating to instruments still held	'	'	39	'	'
Predecessor [Member] | Loans and other receivables [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	'	'	180,393	'	'
Total gains/losses (realized and unrealized)	'	'	-8,682	'	'
Purchases	'	'	105,650	'	'
Sales	'	'	-29,828	'	'
Settlements	'	'	-61,407	'	'
Net transfers into/ (out of) Level 3	'	'	-15,140	'	'
Ending Balance	'	'	170,986	'	'
Change in unrealized gains/(losses) relating to instruments still held	'	'	-12,374	'	'
Predecessor [Member] | Investments at fair value [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	'	'	83,897	'	'
Total gains/losses (realized and unrealized)	'	'	961	'	'
Purchases	'	'	5,952	'	'
Sales	'	'	-4,923	'	'
Settlements	'	'	-9,721	'	'
Net transfers into/ (out of) Level 3	'	'	-1,099	'	'
Ending Balance	'	'	75,067	'	'
Change in unrealized gains/(losses) relating to instruments still held	'	'	1,171	'	'
Predecessor [Member] | Investments in managed funds [Member]	'	'	'	'	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'	'
Beginning Balance	'	'	57,763	'	'
Total gains/losses (realized and unrealized)	'	'	-363	'	'
Purchases	'	'	11,068	'	'
Settlements	'	'	-8,492	'	'
Ending Balance	'	'	59,976	'	'
Change in unrealized gains/(losses) relating to instruments still held	'	'	($363)	'	'

Fair_Value_Disclosures_Summary2

Fair Value Disclosures - Summary of Changes in Fair Value of Financial Liabilities Classified as Level 3 (Detail) (USD $)

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

Aug. 31, 2014

Aug. 31, 2013

Feb. 28, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Feb. 28, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Feb. 28, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2013

Feb. 28, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Feb. 28, 2013

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Mar. 01, 2013

Aug. 24, 2014

Aug. 24, 2014

Aug. 24, 2014

Aug. 24, 2014

Aug. 24, 2014

Aug. 24, 2014

Corporate equity securities [Member]

Corporate equity securities [Member]

Corporate equity securities [Member]

Corporate equity securities [Member]

Corporate debt securities [Member]

Net derivatives [Member]

Net derivatives [Member]

Net derivatives [Member]

Net derivatives [Member]

Loans [Member]

Loans [Member]

Loans [Member]

Loans [Member]

Other secured financings at fair value [Member]

Other secured financings at fair value [Member]

Other secured financings at fair value [Member]

Embedded conversion option [Member]

Embedded conversion option [Member]

Embedded conversion option [Member]

Residential mortgage-backed securities [Member]

Residential mortgage-backed securities [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Corporate equity securities [Member]

Corporate debt securities [Member]

Net derivatives [Member]

Loans [Member]

Other secured financings at fair value [Member]

Embedded conversion option [Member]

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Beginning Balance

'

'

'

'

'

$38,000

$38,000

$38,000

$38,000

$2,780,000

$15,282,000

$10,799,000

$9,188,000

$11,185,000

$31,534,000

$15,212,000

$1,711,000

$7,398,000

$20,288,000

$2,294,000

'

$3,895,000

$10,902,000

$16,488,000

'

$1,542,000

'

'

$16,500,000

$38,000

'

$6,905,000

$22,462,000

$8,711,000

$9,574,000

Total gains/losses (realized and unrealized)

4,200,000

1,100,000

2,700,000

6,500,000

2,000,000

'

'

'

'

-101,000

-1,632,000

3,899,000

2,648,000

3,453,000

'

'

'

'

'

731,000

731,000

-2,463,000

-3,566,000

-9,152,000

25,000

-1,542,000

'

'

'

'

163,000

9,959,000

'

'

-8,142,000

Purchases

'

'

'

'

'

'

'

'

'

-2,566,000

-74,000

'

'

'

-16,307,000

-14,952,000

-1,711,000

-20,221,000

'

'

'

'

'

'

-73,846,000

'

'

'

'

'

-7,000

-124,000

-15,472,000

'

'

Sales

'

'

'

'

'

'

'

'

'

'

74,000

'

'

'

'

716,000

7,398,000

13,799,000

'

'

'

'

'

'

75,363,000

'

'

'

'

'

97,000

-76,000

3,549,000

'

'

Settlements

'

'

'

'

'

'

'

'

'

'

-70,000

-60,000

'

'

'

'

'

'

-7,570,000

'

'

'

'

'

'

'

'

'

'

'

'

248,000

'

-16,684,000

'

Issuances

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

18,948,000

'

'

'

'

'

'

'

0

0

'

'

'

'

'

39,639,000

'

Net transfers into/ (out of) Level 3

'

'

'

'

'

'

'

'

'

129,000

'

'

-651,000

'

-8,566,000

'

'

'

'

'

2,294,000

'

'

'

'

'

'

'

'

'

-11,000

-3,332,000

-3,878,000

'

'

Ending Balance

'

'

'

'

'

38,000

38,000

38,000

38,000

242,000

13,580,000

14,638,000

11,185,000

14,638,000

6,661,000

976,000

7,398,000

976,000

31,666,000

3,025,000

3,025,000

1,432,000

7,336,000

7,336,000

1,542,000

'

'

'

16,500,000

38,000

242,000

13,580,000

6,661,000

31,666,000

1,432,000

Change in unrealized gains/(losses) relating to instruments still held

'

'

'

'

'

'

'

'

'

$67,000

$70,000

($3,899,000)

($2,648,000)

($3,453,000)

'

'

'

'

'

($731,000)

($731,000)

$2,463,000

$3,566,000

$9,152,000

($19,000)

'

'

'

'

'

($163,000)

($10,519,000)

'

'

$8,142,000

Fair_Value_Disclosures_Summary3

Fair Value Disclosures - Summary of Changes in Fair Value of Financial Liabilities Classified as Level 3 (Parenthetical) (Detail) (USD $)	3 Months Ended	9 Months Ended		3 Months Ended
	Aug. 31, 2013	Aug. 31, 2014	Mar. 01, 2013	Feb. 28, 2013
	Successor [Member]	Successor [Member]	Successor [Member]	Predecessor [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'	'	'
Issuances related to transfers of loans accounted for secured financings	$0	$0	'	$0
Embedded conversion option	'	'	$16,500,000	'

Fair_Value_Disclosures_Quantit

Fair Value Disclosures - Quantitative Information about Significant Unobservable Inputs Used in Level 3 Fair Value Measurements (Detail) (USD $)

Aug. 31, 2014

31-May-14

Aug. 31, 2013

31-May-13

Feb. 28, 2013

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

Nov. 30, 2013

In Thousands, except Per Share data, unless otherwise specified

Embedded conversion option [Member]

Embedded conversion option [Member]

Embedded conversion option [Member]

Embedded conversion option [Member]

Embedded conversion option [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Level 3 [Member]

Loan commitments [Member]

Corporate equity securities [Member]

Corporate equity securities [Member]

Corporate debt securities [Member]

Corporate debt securities [Member]

Collateralized debt obligations [Member]

Collateralized debt obligations [Member]

U.S. government and federal agency securities [Member]

Residential mortgage-backed securities [Member]

Residential mortgage-backed securities [Member]

Commercial mortgage-backed securities [Member]

Commercial mortgage-backed securities [Member]

Other asset-backed securities [Member]

Other asset-backed securities [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Investments at fair value [Member]

Investments at fair value [Member]

Embedded conversion option [Member]

Embedded conversion option [Member]

Unfunded commitment [Member]

Equity options [Member]

Loan commitments [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Owned [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Financial Instruments Sold, Not Yet Purchased [Member]

Derivatives [Member]

Private equity securities [Member]

Private equity securities [Member]

Derivatives [Member]

Derivatives [Member]

Derivatives [Member]

Loan commitments [Member]

Corporate equity securities [Member]

Corporate equity securities [Member]

Corporate equity securities [Member]

Corporate equity securities [Member]

Corporate equity securities [Member]

Corporate equity securities [Member]

Corporate debt securities [Member]

Corporate debt securities [Member]

Corporate debt securities [Member]

Corporate debt securities [Member]

Corporate debt securities [Member]

Corporate debt securities [Member]

Corporate debt securities [Member]

Corporate debt securities [Member]

Corporate debt securities [Member]

Corporate debt securities [Member]

Collateralized debt obligations [Member]

Collateralized debt obligations [Member]

Collateralized debt obligations [Member]

Collateralized debt obligations [Member]

Collateralized debt obligations [Member]

Collateralized debt obligations [Member]

Collateralized debt obligations [Member]

U.S. government and federal agency securities [Member]

Residential mortgage-backed securities [Member]

Residential mortgage-backed securities [Member]

Residential mortgage-backed securities [Member]

Residential mortgage-backed securities [Member]

Residential mortgage-backed securities [Member]

Residential mortgage-backed securities [Member]

Commercial mortgage-backed securities [Member]

Commercial mortgage-backed securities [Member]

Commercial mortgage-backed securities [Member]

Commercial mortgage-backed securities [Member]

Commercial mortgage-backed securities [Member]

Commercial mortgage-backed securities [Member]

Other asset-backed securities [Member]

Other asset-backed securities [Member]

Other asset-backed securities [Member]

Other asset-backed securities [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Loans and other receivables [Member]

Investments at fair value [Member]

Investments at fair value [Member]

Investments at fair value [Member]

Investments at fair value [Member]

Investments at fair value [Member]

Investments at fair value [Member]

Market approach [Member]

Option valuation model [Member]

Option valuation model [Member]

Unfunded commitment [Member]

Unfunded commitment [Member]

Unfunded commitment [Member]

Equity options [Member]

Equity options [Member]

Equity options [Member]

Commercial Loan [Member]

Comparable pricing [Member]

Market approach [Member]

Non-exchange traded securities [Member]

Non-exchange traded securities [Member]

Non-exchange traded securities [Member]

Non-exchange traded securities [Member]

Warrants [Member]

Market approach [Member]

Convertible bond model [Member]

Discounted cash flows [Member]

Scenario analysis [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Weighted Average [Member]

Weighted Average [Member]

Discounted cash flows [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Weighted Average [Member]

Weighted Average [Member]

Market approach [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Weighted Average [Member]

Weighted Average [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Weighted Average [Member]

Weighted Average [Member]

Discounted cash flows [Member]

Minimum [Member]

Maximum [Member]

Weighted Average [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Weighted Average [Member]

Weighted Average [Member]

Weighted Average [Member]

Weighted Average [Member]

Weighted Average [Member]

Weighted Average [Member]

Weighted Average [Member]

Private equity securities [Member]

Private equity securities [Member]

Private equity securities [Member]

Private equity securities [Member]

Private equity securities [Member]

Private equity securities [Member]

Embedded conversion option [Member]

Embedded conversion option [Member]

Minimum [Member]

Maximum [Member]

Weighted Average [Member]

Minimum [Member]

Maximum [Member]

Weighted Average [Member]

Market approach [Member]

Derivatives [Member]

Market approach [Member]

Minimum [Member]

Maximum [Member]

Weighted Average [Member]

Option model [Member]

Market approach [Member]

Comparable pricing [Member]

Market approach [Member]

Comparable pricing [Member]

Market approach [Member]

Comparable pricing [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Discounted cash flows [Member]

Market approach [Member]

Market approach [Member]

Comparable pricing [Member]

Comparable pricing [Member]

Scenario analysis [Member]

Scenario analysis [Member]

Market approach [Member]

Market approach [Member]

Comparable pricing [Member]

Comparable pricing [Member]

Scenario analysis [Member]

Scenario analysis [Member]

Market approach [Member]

Market approach [Member]

Comparable pricing [Member]

Comparable pricing [Member]

Scenario analysis [Member]

Scenario analysis [Member]

Market approach [Member]

Comparable pricing [Member]

Comparable pricing [Member]

Minimum [Member]

Maximum [Member]

Weighted Average [Member]

Comparable pricing [Member]

Comparable pricing [Member]

Comparable pricing [Member]

Option model [Member]

Option model [Member]

Option model [Member]

Market approach [Member]

Market approach [Member]

Market approach [Member]

Market approach [Member]

Market approach [Member]

Market approach [Member]

Derivatives [Member]

Derivatives [Member]

Derivatives [Member]

Derivatives [Member]

Derivatives [Member]

Derivatives [Member]

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

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'

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'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Market Value of Financial Instruments Owned

'

'

'

'

'

$1,493

$7,777

$8,034

$34,965

$17,699

$41,690

$34,316

$2,494

$81,034

$105,492

$19,327

$17,568

$2,079

$12,611

$179,189

$101,931

$29,135

$30,203

'

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'

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'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Significant Unobservable Input(s), EBITDA (a) multiple

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3.05

4

5.5

4.53

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

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'

'

'

'

'

6.9

3.05

'

'

'

'

'

'

7

'

'

'

'

'

'

6.64

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Significant Unobservable Input(s), Transaction level

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.95

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Significant Unobservable Input(s), Estimated recovery percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

24.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10.33%

16.90%

'

'

'

'

'

81.30%

92.00%

'

'

'

'

'

70.90%

74.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Significant Unobservable Input(s), Volatility

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

36.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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'

'

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'

'

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'

'

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'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

36.25%

41.00%

39.00%

'

Significant Unobservable Input(s), Discount rate/yield

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

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'

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'

'

'

'

'

'

31.90%

'

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'

'

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'

'

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'

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'

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'

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'

'

'

'

'

'

'

15.00%

30.00%

23.00%

'

'

'

'

'

'

'

'

'

'

'

'

Significant Unobservable Input(s), Comparable bond or loan price

'

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'

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'

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'

'

'

$100.88

'

'

'

'

'

'

'

'

'

'

'

$69.10

'

$70.50

'

$69.91

'

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'

'

$26.80

$414

'

'

'

'

'

'

'

'

$93.50

$99.63

$94.64

'

'

'

$101.88

Significant Unobservable Input(s), Constant prepayment rate

'

'

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'

'

'

'

'

'

'

'

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'

'

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'

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'

'

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'

'

20.00%

'

'

'

'

'

'

'

'

10.00%

0.00%

20.00%

20.00%

15.29%

13.00%

'

3.00%

2.00%

50.00%

50.00%

11.90%

11.00%

'

'

'

'

'

'

0.00%

4.00%

30.00%

17.00%

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Significant Unobservable Input(s), Constant default rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

2.00%

'

'

'

'

'

'

'

2.00%

'

2.00%

'

3.00%

'

2.00%

'

1.00%

1.00%

100.00%

100.00%

14.50%

17.00%

'

'

'

'

'

'

0.00%

2.00%

11.00%

7.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Significant Unobservable Input(s), Loss severity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25.00%

'

'

'

'

'

'

'

'

25.00%

30.00%

95.00%

85.00%

55.70%

38.00%

'

20.00%

30.00%

80.00%

90.00%

48.40%

48.00%

'

'

'

'

'

'

0.00%

40.00%

92.00%

64.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Significant Unobservable Input(s), Yield

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

13.00%

'

16.00%

'

3.70%

'

4.40%

'

4.20%

'

'

0.00%

3.00%

47.30%

91.00%

7.83%

28.00%

'

1.20%

0.00%

12.60%

20.00%

6.00%

7.00%

7.60%

12.00%

15.00%

20.00%

11.60%

14.00%

7.00%

3.00%

29.00%

18.00%

'

'

2.60%

8.75%

'

'

'

'

'

4.60%

13.50%

'

'

'

'

'

3.90%

10.00%

'

'

'

'

'

'

'

'

'

'

'

'

4.58%

'

'

'

'

'

'

'

'

'

Significant Unobservable Input(s), Transaction level

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$100

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$50.36

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Significant Unobservable Input(s), Comparable bond or loan price

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$92.50

$91

'

'

'

'

'

$100

$101

'

'

'

'

'

$99.63

$98.90

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Significant Unobservable Input(s), Cumulative loss rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.60%

5.00%

74.00%

28.20%

16.70%

11.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Significant Unobservable Input(s), Historical volatility

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

18.38%

22.55%

'

'

'

'

'

'

'

Market Value of Financial Instruments Sold, Not Yet Purchased

$1,432

$3,895

$7,336

$10,902

$16,488

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$9,574

$1,432

$14,784

$8,398

$8,106

'

'

'

'

'

'

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Significant Unobservable Input(s), Dividend yield

'

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1.00%

0.87%

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Fair_Value_Disclosures_Summary4

Fair Value Disclosures - Summary of Gains (Losses) Due to Changes in Instrument Specific Credit Risk for Loans and Other Receivables and Loan Commitments Measured at Fair Value under Fair Value Option (Detail) (USD $)

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

In Thousands, unless otherwise specified

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Feb. 28, 2013

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Feb. 28, 2013

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Feb. 28, 2013

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Loans [Member]

Loans [Member]

Loans [Member]

Loans [Member]

Loans [Member]

Loan commitments [Member]

Loan commitments [Member]

Loan commitments [Member]

Loan commitments [Member]

Loan commitments [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Financial instruments owned:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loans and other receivables

($15,002)

$1,097

$2,284

($12,841)

$3,924

'

'

'

'

'

'

'

'

'

'

Financial Instruments Sold:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loan commitments

'

'

'

'

'

$103

'

'

($751)

'

$1,338

$4,440

($2,059)

($10,299)

($2,746)

Fair_Value_Disclosures_Summary5

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 (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Thousands, unless otherwise specified
Financial instruments owned:	'	'
Loans and other receivables	$333,925	$264,896
Loans and other receivables greater than 90 days past due	4,443	'
Loans and other receivables on nonaccrual status	($42,085)	'

Derivative_Financial_Instrumen2

Derivative Financial Instruments - Fair Value and Related Number of Derivative Contracts Categorized by Type of Derivative Contract (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Thousands, unless otherwise specified
Derivatives, Fair Value [Line Items]	'	'
Net amounts per Consolidated Statements of Financial Condition, Assets	$358,675	$261,093
Net amounts per Consolidated Statements of Financial Condition, Liabilities	267,005	180,079
Exchange-traded [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	719,589	530,983
Number of Contracts, Assets	'	'
Fair Value, Liabilities	659,657	502,657
Number of Contracts, Liabilities	'	'
Amounts offset in the Consolidated Statements of Financial Condition, Assets	-655,081	-489,375
Amounts offset in the Consolidated Statements of Financial Condition, Liabilities	-655,081	-489,375
Cleared OTC [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	1,056,950	482,198
Number of Contracts, Assets	'	'
Fair Value, Liabilities	1,084,194	448,054
Number of Contracts, Liabilities	'	'
Amounts offset in the Consolidated Statements of Financial Condition, Assets	-1,040,774	-446,520
Amounts offset in the Consolidated Statements of Financial Condition, Liabilities	-1,061,414	-445,106
Bilateral OTC [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	1,730,955	1,501,501
Number of Contracts, Assets	'	'
Fair Value, Liabilities	1,663,289	1,581,979
Number of Contracts, Liabilities	'	'
Amounts offset in the Consolidated Statements of Financial Condition, Assets	-1,452,964	-1,317,694
Amounts offset in the Consolidated Statements of Financial Condition, Liabilities	-1,423,640	-1,418,130
Interest rate contracts [Member] | Exchange-traded [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	4,040	8,696
Number of Contracts, Assets	55,660	57,344
Fair Value, Liabilities	3,335	3,846
Number of Contracts, Liabilities	80,615	68,268
Interest rate contracts [Member] | Cleared OTC [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	1,001,657	432,667
Number of Contracts, Assets	2,268	5,402
Fair Value, Liabilities	1,025,998	396,422
Number of Contracts, Liabilities	1,949	7,730
Interest rate contracts [Member] | Bilateral OTC [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	823,612	724,613
Number of Contracts, Assets	1,723	1,221
Fair Value, Liabilities	794,541	730,897
Number of Contracts, Liabilities	710	1,340
Foreign exchange contracts [Member] | Exchange-traded [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	3	33
Number of Contracts, Assets	16,278	111,229
Fair Value, Liabilities	65	40
Number of Contracts, Liabilities	23,221	104,205
Foreign exchange contracts [Member] | Bilateral OTC [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	732,662	653,739
Number of Contracts, Assets	12,058	7,478
Fair Value, Liabilities	655,255	693,618
Number of Contracts, Liabilities	12,188	8,212
Equity contracts [Member] | Exchange-traded [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	659,267	495,069
Number of Contracts, Assets	1,887,129	1,742,195
Fair Value, Liabilities	606,331	465,110
Number of Contracts, Liabilities	1,886,569	1,800,467
Equity contracts [Member] | Bilateral OTC [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	49,638	6,715
Number of Contracts, Assets	2,716	148
Fair Value, Liabilities	72,821	9,875
Number of Contracts, Liabilities	280	136
Commodity contracts [Member] | Exchange-traded [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	56,279	27,185
Number of Contracts, Assets	1,118,702	785,718
Fair Value, Liabilities	49,926	33,661
Number of Contracts, Liabilities	1,123,739	780,358
Commodity contracts [Member] | Bilateral OTC [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	123,678	114,095
Number of Contracts, Assets	3,422	11,811
Fair Value, Liabilities	119,784	139,458
Number of Contracts, Liabilities	3,733	8,359
Credit contracts [Member] | Cleared OTC [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	55,293	49,531
Number of Contracts, Assets	51	49
Fair Value, Liabilities	58,196	51,632
Number of Contracts, Liabilities	52	46
Credit contracts [Member] | Bilateral OTC [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Fair Value, Assets	1,365	2,339
Number of Contracts, Assets	15	16
Fair Value, Liabilities	$20,888	$8,131
Number of Contracts, Liabilities	29	19

Derivative_Financial_Instrumen3

Derivative Financial Instruments - Unrealized and Realized Gains (Losses) on Derivative Contracts (Detail) (USD $)

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

In Thousands, unless otherwise specified

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Feb. 28, 2013

Feb. 28, 2013

Feb. 28, 2013

Feb. 28, 2013

Feb. 28, 2013

Feb. 28, 2013

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Interest rate contracts [Member]

Interest rate contracts [Member]

Interest rate contracts [Member]

Interest rate contracts [Member]

Foreign exchange contracts [Member]

Foreign exchange contracts [Member]

Foreign exchange contracts [Member]

Foreign exchange contracts [Member]

Equity contracts [Member]

Equity contracts [Member]

Equity contracts [Member]

Equity contracts [Member]

Commodity contracts [Member]

Commodity contracts [Member]

Commodity contracts [Member]

Commodity contracts [Member]

Credit contracts [Member]

Credit contracts [Member]

Credit contracts [Member]

Credit contracts [Member]

Interest rate contracts [Member]

Foreign exchange contracts [Member]

Equity contracts [Member]

Commodity contracts [Member]

Credit contracts [Member]

Derivative Instruments, Gain (Loss) [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrealized and realized gains (losses)

($52,849)

$165,933

$238,527

($243,185)

($3,803)

$130,178

$177,796

($46,376)

$6,697

($3,930)

($25)

$8,294

($49,422)

$25,509

$37,588

($220,774)

($4,991)

$15,080

$36,593

$32,989

($1,330)

($904)

($13,425)

($17,318)

$52,864

$45,875

$12,228

($20,938)

$19,585

($3,886)

Derivative_Financial_Instrumen4

Derivative Financial Instruments - Remaining Contract Maturity of Fair Value of OTC Derivative Assets and Liabilities (Detail) (USD $)	Aug. 31, 2014
In Thousands, unless otherwise specified
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]	'
OTC derivative assets having maturity period of 0 to 12 months	$295,407
OTC derivative assets having maturity period of 1 to 5 years	182,824
OTC derivative assets having maturity period of greater than 5 years	161,702
OTC derivative assets cross-maturity netting	-81,430
Total OTC derivative assets, net of cross-maturity netting	558,503
Cross product counterparty netting	-8,871
Total OTC derivative assets included in Financial instruments owned	549,632
OTC derivative liabilities having maturity period of 0 to 12 months	206,195
OTC derivative liabilities having maturity period of 1 to 5 years	143,085
OTC derivative liabilities having maturity period of greater than 5 years	239,953
OTC derivative liabilities cross-maturity netting	-81,430
Total OTC derivative liabilities, net of cross-maturity netting	507,803
Total OTC derivative liabilities included in Financial instruments sold, not yet purchased	498,932
Commodity swaps, options and forwards [Member]	'
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]	'
OTC derivative assets having maturity period of 0 to 12 months	62,219
OTC derivative assets having maturity period of 1 to 5 years	7,459
OTC derivative assets cross-maturity netting	-2,344
Total OTC derivative assets, net of cross-maturity netting	67,334
OTC derivative liabilities having maturity period of 0 to 12 months	58,743
OTC derivative liabilities having maturity period of 1 to 5 years	7,042
OTC derivative liabilities cross-maturity netting	-2,344
Total OTC derivative liabilities, net of cross-maturity netting	63,441
Credit default swaps [Member]	'
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]	'
OTC derivative liabilities having maturity period of 0 to 12 months	62
OTC derivative liabilities having maturity period of 1 to 5 years	7,892
OTC derivative liabilities having maturity period of greater than 5 years	747
Total OTC derivative liabilities, net of cross-maturity netting	8,701
Equity swaps and options [Member]	'
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]	'
OTC derivative assets having maturity period of 0 to 12 months	1,980
OTC derivative assets having maturity period of 1 to 5 years	36,355
OTC derivative assets having maturity period of greater than 5 years	5,911
Total OTC derivative assets, net of cross-maturity netting	44,246
OTC derivative liabilities having maturity period of 1 to 5 years	9,977
OTC derivative liabilities having maturity period of greater than 5 years	58,712
Total OTC derivative liabilities, net of cross-maturity netting	68,689
Total return swaps [Member]	'
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]	'
OTC derivative assets having maturity period of 0 to 12 months	2,816
OTC derivative assets having maturity period of 1 to 5 years	2
Total OTC derivative assets, net of cross-maturity netting	2,818
OTC derivative liabilities having maturity period of 0 to 12 months	1,704
Total OTC derivative liabilities, net of cross-maturity netting	1,704
Foreign currency forwards, swaps and options [Member]	'
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]	'
OTC derivative assets having maturity period of 0 to 12 months	179,297
OTC derivative assets having maturity period of 1 to 5 years	31,983
OTC derivative assets having maturity period of greater than 5 years	3,255
OTC derivative assets cross-maturity netting	-16,960
Total OTC derivative assets, net of cross-maturity netting	197,575
OTC derivative liabilities having maturity period of 0 to 12 months	106,582
OTC derivative liabilities having maturity period of 1 to 5 years	27,173
OTC derivative liabilities having maturity period of greater than 5 years	3,084
OTC derivative liabilities cross-maturity netting	-16,960
Total OTC derivative liabilities, net of cross-maturity netting	119,879
Interest rate swaps, options and forwards [Member]	'
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]	'
OTC derivative assets having maturity period of 0 to 12 months	49,095
OTC derivative assets having maturity period of 1 to 5 years	107,025
OTC derivative assets having maturity period of greater than 5 years	152,536
OTC derivative assets cross-maturity netting	-62,126
Total OTC derivative assets, net of cross-maturity netting	246,530
OTC derivative liabilities having maturity period of 0 to 12 months	39,104
OTC derivative liabilities having maturity period of 1 to 5 years	91,001
OTC derivative liabilities having maturity period of greater than 5 years	177,410
OTC derivative liabilities cross-maturity netting	-62,126
Total OTC derivative liabilities, net of cross-maturity netting	$245,389

Derivative_Financial_Instrumen5

Derivative Financial Instruments - Remaining Contract Maturity of Fair Value of OTC Derivative Assets and Liabilities (Parenthetical) (Detail) (USD $)	Aug. 31, 2014
In Millions, unless otherwise specified
Debt Instrument Fair Value Carrying Value [Abstract]	'
Exchange traded derivative assets	$69
Cash collateral received	260
Exchange traded derivative liabilities, with fair value	19.2
Cash collateral pledged	$251.30

Derivative_Financial_Instrumen6

Derivative Financial Instruments - Counterparty Credit Quality with Respect to Fair Value of OTC Derivatives Assets (Detail) (USD $)	Aug. 31, 2014
In Thousands, unless otherwise specified
Offsetting [Abstract]	'
Fair value of OTC derivatives assets, Counterparty credit quality, A- or higher	$326,452
Fair value of OTC derivatives assets, Counterparty credit quality, BBB- to BBB+	69,223
Fair value of OTC derivatives assets, Counterparty credit quality, BB+ or lower	54,989
Fair value of OTC derivatives assets, Counterparty credit quality, Unrated	98,968
Fair value of Over the Counter Derivatives Assets Counterparty credit quality	$549,632

Derivative_Financial_Instrumen7

Derivative Financial Instruments - Additional Information (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Millions, unless otherwise specified
Offsetting [Abstract]	'	'
Fair value of derivative instruments in a liability position	$85.80	$170.20
Collateral posted for derivative instruments in a liability position	65.1	127.7
Additional collateral required for derivative instruments in a liability position	$23.80	$49.40

Collateralized_Transactions_Ad

Collateralized Transactions - Additional Information (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
Collateralized Securities Transactions [Abstract]	'	'
Fair value of securities received as collateral	$24,800,000,000	$21,900,000,000
Securities received as collateral	8,326,000	11,063,000
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	$3,301,185,000	$3,616,602,000

Collateralized_Transactions_Su

Collateralized Transactions - Summary of Repurchase Agreements and Securities Borrowing and Lending Arrangements (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Thousands, unless otherwise specified
Collateralized Securities Transactions [Abstract]	'	'
Securities borrowing arrangements, Gross amounts	$6,270,452	$5,359,846
Securities borrowing arrangements, Netting in consolidated statement of financial condition	'	'
Securities borrowing arrangements, Net amounts in consolidated statement of financial condition	6,270,452	5,359,846
Securities borrowing arrangements, Additional amounts available for setoff	-555,662	-530,293
Securities borrowing arrangements, Available collateral	-977,138	-957,140
Securities borrowing arrangements, Net amount	4,737,652	3,872,413
Reverse repurchase agreements, Gross amounts	13,768,047	12,715,449
Reverse repurchase agreements, Netting in consolidated statement of financial condition	-9,197,514	-8,968,529
Reverse repurchase agreements, Net amounts in consolidated statement of financial condition	4,570,533	3,746,920
Reverse repurchase agreements, Additional amounts available for setoff	-547,636	-590,754
Reverse repurchase agreements, Available collateral	-3,987,093	-3,074,540
Reverse repurchase agreements, Net amount	35,804	81,626
Securities lending arrangements, Gross amounts	2,468,513	2,506,122
Securities lending arrangements, Netting in consolidated statement of financial condition	'	'
Securities lending arrangements, Net amounts in consolidated statement of financial condition	2,468,513	2,506,122
Securities lending arrangements, Additional amounts available for setoff	-555,662	-530,293
Securities lending arrangements, Available collateral	-1,883,794	-1,942,271
Securities lending arrangements, Net amount	29,057	33,558
Repurchase agreements, Gross amounts	19,729,573	19,748,374
Repurchase agreements, Netting in consolidated statement of financial condition	-9,197,514	-8,968,529
Repurchase agreements, Net amounts in consolidated statement of financial condition	10,532,059	10,779,845
Repurchase agreements, Additional amounts available for setoff	-547,636	-590,754
Repurchase agreements, Available collateral	-9,301,230	-8,748,641
Repurchase agreements, Net amount	$683,193	$1,440,450

Collateralized_Transactions_Su1

Collateralized Transactions - Summary of Repurchase Agreements and Securities Borrowing and Lending Arrangements (Parenthetical) (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Millions, unless otherwise specified
Collateralized Securities Transactions [Abstract]	'	'
Securities borrowing arrangements	$4,700.30	$3,818.40
Securities borrowing arrangements, collateral	4,579.80	3,721.80
Securities borrowing arrangements, repurchase agreements	667.4	1,410
Securities borrowing arrangements, pledged securities collateral	$694.50	$1,438.90

Securitization_Activities_Acti

Securitization Activities - Activity Related to Securitizations Accounted for as Sales (Detail) (USD $)	3 Months Ended		6 Months Ended	9 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2013	Aug. 31, 2014	Feb. 28, 2013
	Successor [Member]	Successor [Member]	Successor [Member]	Successor [Member]	Predecessor [Member]
Securitization Vehicles [Line Items]	'	'	'	'	'
Transferred assets	$1,562.10	$918.40	$3,102.40	$4,788.70	$2,735.20
Proceeds on new securitizations	1,567.20	921.5	3,112.50	4,795.40	2,751.30
Cash flows received on retained interests	$15.20	$13	$24.20	$37.90	$32.30

Securitization_Activities_Summ

Securitization Activities - Summary of Retained Interests in SPEs (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Millions, unless otherwise specified
Securitization Vehicles [Line Items]	'	'
Total RMBS securitization assets	$17,478.60	$11,518.40
Total CMBS securitization assets	5,046.30	5,385.60
Total Collateralized loan obligations	2,711.30	728.5
U.S. government agency residential mortgage-backed securities [Member]	'	'
Securitization Vehicles [Line Items]	'	'
Fair Value of Securitizations Initially Retained	312.5	281.3
U.S. government agency commercial mortgage-backed securities [Member]	'	'
Securitization Vehicles [Line Items]	'	'
Fair Value of Securitizations Initially Retained	100.5	96.8
Collateralized loan obligations [Member]	'	'
Securitization Vehicles [Line Items]	'	'
Fair Value of Securitizations Initially Retained	$42.70	$9

Securitization_Activities_Addi

Securitization Activities - Additional Information (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Millions, unless otherwise specified
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'	'
Carrying value of assets	$12.70	$8.70
Carrying value of liabilities	$12.70	$8.70

Variable_Interest_Entities_Ass

Variable Interest Entities - Assets and Liabilities of Consolidated VIEs Prior to Consolidation (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
Variable Interest Entity [Line Items]	'	'
Cash	$4,035,239,000	$3,561,119,000
Financial instruments owned	18,420,173,000	16,650,043,000
Securities purchased under agreement to resell	4,570,533,000	3,746,920,000
Other assets	1,152,022,000	1,130,136,000
Total assets	44,764,080,000	40,176,996,000
Total liabilities	39,161,666,000	34,755,322,000
Securitization Vehicles [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Cash	'	'
Financial instruments owned	56,900,000	97,500,000
Securities purchased under agreement to resell	585,200,000	195,100,000
Fees, interest and other receivables	1,000,000	'
Other assets	'	2,300,000
Total assets	643,100,000	294,900,000
Other secured financings	641,900,000	292,500,000
Other liabilities	1,200,000	2,100,000
Total liabilities	643,100,000	294,600,000
Other [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Cash	200,000	200,000
Financial instruments owned	300,000	400,000
Securities purchased under agreement to resell	'	'
Fees, interest and other receivables	'	'
Other assets	'	'
Total assets	500,000	600,000
Other secured financings	'	'
Other liabilities	200,000	200,000
Total liabilities	$200,000	$200,000

Variable_Interest_Entities_Ass1

Variable Interest Entities - Assets and Liabilities of Consolidated VIEs Prior to Consolidation (Parenthetical) (Detail) (Securitization Vehicles [Member], USD $)	Aug. 31, 2014	Nov. 30, 2013
In Millions, unless otherwise specified
Securitization Vehicles [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Secured financing included in inventory and eliminated	$37.90	$66.50

Variable_Interest_Entities_Var

Variable Interest Entities - Variable Interests in Non-Consolidated Variable Interest Entities (Detail) (Variable Interest Entity Not Primary Beneficiary [Member], USD $)	Aug. 31, 2014	Nov. 30, 2013
In Millions, unless otherwise specified
Variable Interest Entity [Line Items]	'	'
Carrying Amount, Assets	$235.40	$56.20
Carrying Amount, Liabilities	0.1	0.2
Maximum exposure to loss in non-consolidated VIEs	678.2	161.1
Size of the variable interest entity measured by total assets	5,568.20	1,665.90
Collateralized loan obligations [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Carrying Amount, Assets	51	11.9
Carrying Amount, Liabilities	0.1	0.2
Maximum exposure to loss in non-consolidated VIEs	245	88.8
Size of the variable interest entity measured by total assets	4,897.50	1,122.30
Consumer Loan Financing Vehicles [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Carrying Amount, Assets	133.6	'
Carrying Amount, Liabilities	'	'
Maximum exposure to loss in non-consolidated VIEs	367.5	'
Size of the variable interest entity measured by total assets	261.8	'
Asset management vehicle [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Carrying Amount, Assets	3.6	3.5
Carrying Amount, Liabilities	'	'
Maximum exposure to loss in non-consolidated VIEs	3.6	3.5
Size of the variable interest entity measured by total assets	310.1	454.2
Private equity vehicles [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Carrying Amount, Assets	47.2	40.8
Carrying Amount, Liabilities	'	'
Maximum exposure to loss in non-consolidated VIEs	62.1	68.8
Size of the variable interest entity measured by total assets	$98.80	$89.40

Variable_Interest_Entities_Non

Variable Interest Entities - Non-consolidated VIEs - Additional Information (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Millions, unless otherwise specified
Agency mortgage-backed securities [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Carrying amount	$2,874.90	$3,476.20
Nonagency mortgage- and other asset-backed securities [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Carrying amount	910	985
Jefferies Employee Partners IV, LLC [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Carrying amount of equity investment	1.3	1.6
USA Fund [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Equity investment in Jefferies SBI USA Fund L.P. (the "USA Fund")	75	'
Funded equity commitments	60.1	47
Carrying amount of equity investment	$45.90	$39.20

Investments_Jefferies_Finance_

Investments - Jefferies Finance - Additional Information (Detail) (USD $)	3 Months Ended			6 Months Ended	9 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Feb. 28, 2013	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013	Nov. 30, 2013
Guarantee Obligations [Line Items]	'	'	'	'	'	'	'
Equity commitments to JFIN	$600,000,000	'	'	'	$600,000,000	'	'
Total committed equity capitalization of JIFN	1,200,000,000	'	'	'	1,200,000,000	'	'
Funded portion of equity commitment to subsidiary	360,000,000	'	'	'	360,000,000	'	'
Unfunded portion of equity commitment to subsidiary	240,000,000	'	'	'	240,000,000	'	'
Investment expiry date	'	'	'	'	1-Mar-16	'	'
Committed line of credit facility amount	1,000,000,000	'	'	'	1,000,000,000	'	'
Loan maturity description	'	'	'	'	'Scheduled to mature on March 1, 2016 with automatic one year extensions absent a 60 day termination notice by either party.	'	'
Extension period	'	'	'	'	'1 year	'	'
Termination notice period	'	'	'	'	'60 days	'	'
Loan commitment	350,000,000	'	'	'	350,000,000	'	'
Interest income	300,000	400,000	4,100,000	800,000	'	'	'
Unfunded commitment fees	400,000	400,000	300,000	800,000	'	'	'
Funded portion of loan commitment	0	'	'	'	0	'	123,800,000
Net underwriting fees paid by JFIN related to originations of loans by JFIN	53,700,000	35,200,000	39,900,000	70,400,000	139,800,000	'	'
Fees paid to JFIN related to origination of loans by JFIN	2,600,000	2,500,000	800,000	8,700,000	10,500,000	'	'
Revenue in Connection of Execution of JFIN CLO	700,000	'	'	'	'	'	'
Committed Advances [Member]	'	'	'	'	'	'	'
Guarantee Obligations [Line Items]	'	'	'	'	'	'	'
Committed line of credit facility amount	700,000,000	'	'	'	700,000,000	'	'
Discretionary Advances [Member]	'	'	'	'	'	'	'
Guarantee Obligations [Line Items]	'	'	'	'	'	'	'
Committed line of credit facility amount	300,000,000	'	'	'	300,000,000	'	'
Jefferies Finance, LLC [Member]	'	'	'	'	'	'	'
Guarantee Obligations [Line Items]	'	'	'	'	'	'	'
Net income earnings	58,000,000	30,500,000	'	'	116,200,000	87,500,000	'
Administrative services provided	6,500,000	4,100,000	15,700,000	9,500,000	35,200,000	'	'
Receivables under service agreement	30,300,000	'	'	'	30,300,000	'	31,100,000
Secured Revolving Credit Facility [Member]	'	'	'	'	'	'	'
Guarantee Obligations [Line Items]	'	'	'	'	'	'	'
Interest income	'	'	'	'	1,400,000	'	'
Unfunded commitment fees	'	'	'	'	$1,500,000	'	'

Investments_Summary_of_Selecte

Investments - Summary of Selected Financial Information for Jefferies Finance (Detail) (Jefferies Finance, LLC [Member], USD $)	Aug. 31, 2014	Nov. 30, 2013
In Millions, unless otherwise specified
Jefferies Finance, LLC [Member]	'	'
Total assets	$5,109.70	$3,271.90
Total liabilities	4,389.70	2,597
Total equity	720	674.9
Our total equity balance	$360	$337.30

Investments_Jefferies_LoanCore

Investments - Jefferies LoanCore - Additional Information (Detail) (USD $)	3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Feb. 28, 2013	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013	Nov. 30, 2013	Feb. 23, 2014
Guarantee Obligations [Line Items]	'	'	'	'	'	'	'	'
Equity commitment	$600,000,000	'	'	'	$600,000,000	'	'	'
Jefferies LoanCore, LLC [Member]	'	'	'	'	'	'	'	'
Guarantee Obligations [Line Items]	'	'	'	'	'	'	'	'
Aggregate commitment	'	'	'	'	'	'	'	600,000,000
Funded portion of equity commitment to subsidiary	197,500,000	'	'	'	'	'	175,500,000	'
Equity commitment	291,000,000	'	'	'	291,000,000	'	'	'
Percentage of the Variable Interest Entity's (VIE) voting interest	48.50%	'	'	'	48.50%	'	'	'
Net earnings from equity method investment	4,500,000	16,700,000	'	'	16,300,000	65,800,000	'	'
Reimbursed administrative services	22,000,000	100,000	600,000	0.2	100,000	'	'	'
Receivables under service agreement	9,000	'	'	'	9,000	'	230,000	'
Placement fees earned	$0	'	'	'	$600,000	'	'	'

Investments_Summary_of_Selecte1

Investments - Summary of Selected Financial Information for Jefferies LoanCore (Detail) (Jefferies LoanCore, LLC [Member], USD $)	Aug. 31, 2014	Nov. 30, 2013
In Millions, unless otherwise specified
Jefferies LoanCore, LLC [Member]	'	'
Total assets	$1,319.70	$974.90
Total liabilities	804.7	507.9
Total equity	515	467
Our total equity balance	$249.80	$226.50

Investments_Knight_Capital_Add

Investments - Knight Capital - Additional Information (Detail) (USD $)

0 Months Ended

6 Months Ended

0 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

Jul. 01, 2013

Aug. 31, 2013

Aug. 31, 2014

Nov. 30, 2013

Jul. 01, 2013

Aug. 31, 2014

Jun. 30, 2014

Aug. 31, 2013

Feb. 28, 2013

Jun. 30, 2014

Aug. 31, 2014

Nov. 30, 2013

Jul. 01, 2013

Aug. 06, 2012

Knight Capital Group, Inc. [Member]

Knight Capital Group, Inc. [Member]

Knight Capital Group, Inc. [Member]

Knight Capital Group, Inc. [Member]

Knight Capital Group, Inc. [Member]

Knight Capital Group, Inc. [Member]

Knight Capital Group, Inc. [Member]

Knight Capital Group, Inc. [Member]

Knight Capital Group, Inc. [Member]

Knight Capital Group, Inc. [Member]

Guarantee Obligations [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchased preferred stock in exchange for cash consideration

'

'

'

'

'

'

'

'

'

'

'

'

'

$125,000,000

Consummation of merger received cash consideration per share

$3.75

'

'

'

'

'

'

'

'

'

'

'

'

'

Consummation of merger received cash consideration

'

'

'

'

'

'

'

'

'

'

'

'

192,000,000

'

Percentage of holding redeemed for cash

63.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock consideration received

'

'

'

'

0.33

'

'

'

'

'

'

'

'

'

Percentage of outstanding common stock owned

'

'

'

'

'

19.00%

'

'

'

'

19.00%

'

'

'

Recognized changes in the fair value of equity method investment

'

-21,700,000

'

'

'

-6,500,000

'

-16,000,000

26,500,000

'

100,000

'

'

'

Net income

'

'

'

'

'

'

9,000,000

'

'

44,600,000

'

'

'

'

Securities borrowed

'

'

6,270,452,000

5,359,846,000

'

6,800,000

'

'

'

'

6,800,000

11,000,000

'

'

Securities loaned

'

'

$2,468,513,000

$2,506,122,000

'

$6,900,000

'

'

'

'

$6,900,000

$22,700,000

'

'

Investments_Summary_of_Selecte2

Investments - Summary of Selected Financial Information for KCG Holdings (Detail) (Knight Capital Group, Inc. [Member], USD $)	Jun. 30, 2014
In Millions, unless otherwise specified
Knight Capital Group, Inc. [Member]	'
Schedule of Investments [Line Items]	'
Total assets	$7,662.50
Total liabilities	6,128.80
Total equity	$1,533.70

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended	0 Months Ended	9 Months Ended	12 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Feb. 28, 2013	Aug. 31, 2013	Aug. 31, 2014	Nov. 30, 2013	Aug. 01, 2013	Aug. 31, 2014	Nov. 30, 2013
							Exchange and clearing organization membership interests and registrations [Member]	Exchange and clearing organization membership interests and registrations [Member]	Exchange and clearing organization membership interests and registrations [Member]
Goodwill	$1,723,619,000	'	$1,700,000,000	'	$1,723,619,000	$1,722,346,000	'	'	'
Annual goodwill impairment testing date	'	'	'	'	1-Aug-14	'	'	'	'
Goodwill allocated to reporting units	1,709,600,000	'	'	'	1,709,600,000	'	'	'	'
Percentage of total goodwill contain for less significant reporting units	0.80%	'	'	'	0.80%	'	'	'	'
Impairment loss	'	'	'	'	178,000	378,000	378,000,000	178,000	378,000
Aggregate amortization expense	$3,200,000	$6,800,000	$400,000	$13,600,000	$9,600,000	'	'	'	'

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets - Schedule of Goodwill Resulting from Leucadia Transaction Attributable to Reportable Segments (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013	Feb. 28, 2013
In Thousands, unless otherwise specified
Business Combination Transactions [Line Items]	'	'	'
Total goodwill	$1,723,619	$1,722,346	$1,700,000
Capital Markets [Member]	'	'	'
Business Combination Transactions [Line Items]	'	'	'
Total goodwill	1,718,519	1,717,246	'
Asset Management [Member]	'	'	'
Business Combination Transactions [Line Items]	'	'	'
Total goodwill	$5,100	$5,100	'

Goodwill_and_Other_Intangible_4

Goodwill and Other Intangible Assets - Summary of Goodwill (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013	Feb. 28, 2013	Aug. 31, 2014	Aug. 31, 2014	Nov. 30, 2013	Feb. 28, 2013
In Thousands, unless otherwise specified				Successor [Member]	Successor [Member]	Successor [Member]	Predecessor [Member]
Goodwill [Line Items]	'	'	'	'	'	'	'
Balance, at beginning of period	$1,723,619	$1,722,346	$1,700,000	$1,725,117	$1,722,346	$1,720,380	$365,670
Less: Disposal	'	'	'	'	'	-5,700	'
Add: Contingent consideration	'	'	'	'	'	'	2,394
Add: Translation adjustments	'	'	'	-1,498	1,273	7,666	-1,287
Balance, at end of period	$1,723,619	$1,722,346	$1,700,000	$1,723,619	$1,723,619	$1,722,346	$366,777

Goodwill_and_Other_Intangible_5

Goodwill and Other Intangible Assets - Summary of Goodwill (Parenthetical) (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Feb. 28, 2013
Business Combinations [Abstract]	'
Goodwill purchase accounting adjustments	$0

Goodwill_and_Other_Intangible_6

Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) (USD $)	0 Months Ended	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Aug. 01, 2013	Aug. 31, 2014	Nov. 30, 2013
Finite And Infinite Lived Intangible Assets [Line Items]	'	'	'
Total gross costs - intangible assets	'	$285,089	$285,001
Impairment losses	'	-178	-378
Accumulated amortization - finite lived intangible assets	'	-30,174	-20,533
Total net carrying amount - intangible assets	'	254,737	264,090
Exchange and clearing organization membership interests and registrations [Member]	'	'	'
Finite And Infinite Lived Intangible Assets [Line Items]	'	'	'
Gross costs - indefinite lived intangible assets	'	14,930	15,294
Impairment losses	-378,000	-178	-378
Accumulated amortization - finite lived intangible assets	'	'	'
Net carrying amount - indefinite lived intangible assets	'	14,752	14,916
Customer relationships [Member]	'	'	'
Finite And Infinite Lived Intangible Assets [Line Items]	'	'	'
Gross costs - finite lived intangible assets	'	136,956	136,740
Impairment losses	'	'	'
Accumulated amortization - finite lived intangible assets	'	-24,310	-17,567
Net carrying amount - finite lived intangible assets	'	112,646	119,173
Weighted average remaining lives (years)	'	'14 years 1 month 6 days	'14 years 9 months 18 days
Trade name [Member]	'	'	'
Finite And Infinite Lived Intangible Assets [Line Items]	'	'	'
Gross costs - finite lived intangible assets	'	133,203	132,967
Impairment losses	'	'	'
Accumulated amortization - finite lived intangible assets	'	-5,864	-2,966
Net carrying amount - finite lived intangible assets	'	$127,339	$130,001
Weighted average remaining lives (years)	'	'33 years 6 months	'34 years 3 months 18 days

Goodwill_and_Other_Intangible_7

Goodwill and Other Intangible Assets - Future Amortization Expense Related to Intangible Assets (Detail) (USD $)	Aug. 31, 2014
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'
Remainder of fiscal 2014	$3,167
Year ended November 30, 2015	12,668
Year ended November 30, 2016	12,668
Year ended November 30, 2017	12,668
Year ended November 30, 2018	$12,668

ShortTerm_Borrowings_Additiona

Short-Term Borrowings - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended	9 Months Ended
	Aug. 31, 2014	Feb. 28, 2013	Aug. 31, 2013	Aug. 31, 2014	Nov. 30, 2013
Debt Disclosure [Abstract]	'	'	'	'	'
Short-term borrowings	$92,000,000	'	'	$92,000,000	$12,000,000
Average daily short-term borrowings	$31,300,000	$110,000,000	$34,000,000	$87,900,000	'
Interest rate on short-term borrowings outstanding	1.75%	'	'	1.75%	'

LongTerm_Debt_Additional_Infor

Long-Term Debt - Additional Information (Detail)

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

9 Months Ended

Jun. 26, 2014

Aug. 31, 2014

Feb. 28, 2013

Aug. 26, 2011

Sep. 11, 2014

Sep. 11, 2014

Jan. 15, 2013

Jan. 15, 2013

Jan. 15, 2013

Jan. 15, 2013

Jan. 15, 2013

20-May-14

20-May-14

Aug. 31, 2014

20-May-14

Aug. 31, 2014

Aug. 31, 2014

USD ($)

USD ($)

USD ($)

USD ($)

Leucadia [Member]

Leucadia [Member]

New senior unsecured long-term debt [Member]

5.125% Senior Notes, due 2023 [Member]

5.125% Senior Notes, due 2023 [Member]

6.5% Senior Notes, due 2043 [Member]

6.5% Senior Notes, due 2043 [Member]

Euro Medium Term Note Program [Member]

2.375% Euro Medium Term Notes, due 2020 [Member]

2.375% Euro Medium Term Notes, due 2020 [Member]

2.375% Euro Medium Term Notes, due 2020 [Member]

3.875% Convertible Senior Debentures due 2029 [Member]

3.875% Convertible Senior Debentures due 2029 [Member]

Subsequent event [Member]

Subsequent event [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

EUR (€)

USD ($)

Leucadia [Member]

USD ($)

USD ($)

USD ($)

Trading_day

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt at fair value

'

'

$6,100,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Difference between fair value over the total principal amount

'

'

536,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Issuance of senior unsecured long-term debt

'

'

'

'

'

'

1,000,000,000

'

600,000,000

'

400,000,000

2,000,000,000

'

'

500,000,000

345,000,000

'

Proceeds, net of original issue discount amount

'

'

'

'

'

'

'

595,600,000

'

391,700,000

'

'

498,700,000

'

'

'

'

Senior long-term debt, interest rate

'

'

'

'

'

'

'

'

5.13%

'

6.50%

'

'

2.38%

2.38%

3.88%

3.88%

Senior long-term debt, due date

'

'

'

'

'

'

'

'2023

'

'2043

'

'

'2020

'

'

'

'

Debenture principal amount

'

'

'

'

1,000

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument convertible conversion ratio

'

'

'

'

22.1312

'

'

'

'

'

'

'

'

'

'

'

'

Conversion price of common stock

'

'

'

'

'

$45.19

'

'

'

'

'

'

'

'

'

'

'

Debt instrument convertible conversion ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

130.00%

Earliest period of conversion price

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

20

Latest period of conversion price

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'30 days

Consecutive trading days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'10 days

Trading price per debenture related to common stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

95.00%

Debentures convertible at holder's options

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'1) Leucadia's common stock price is greater than or equal to 130% of the conversion price for at least 20 trading days in a period of 30 consecutive trading days; 2) if the trading price per debenture is less than 95% of the price of the common stock times the conversion ratio for any 10 consecutive trading days; 3) if the debentures are called for redemption; or 4) upon the occurrence of specific corporate actions.

Description to redeem the debentures for par, plus accrued interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'On or after November 1, 2012 if the price of Leucadia's common stock is greater than 130% of the conversion price for at least 20 days in a period of 30 consecutive trading days and we may redeem the debentures for par, plus accrued interest, at our election any time on or after November 1, 2017.

Description of contingent debenture interest payment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'November 1, 2017, 2019 and 2024. In addition to ordinary interest, commencing November 1, 2017, contingent interest will accrue at 0.375% if the average trading price of a debenture for 5 trading days ending on and including the third trading day immediately preceding a six-month interest period equals or exceed $1,200 per $1,000 debenture

Trading price of contingent interest

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,200

Revolving credit facility

'

'

'

950,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Borrowed unsecured credit facility-JBL

'

250,000,000

'

250,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Amended and restated credit facility period

'3 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit reduced borrowing capacity

$750,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

LongTerm_Debt_Summary_of_LongT

Long-Term Debt - Summary of Long-Term Debt Carrying Values Including Unamortized Discounts and Premiums (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Long-term debt	$6,625,978	$6,232,806
Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	6,367,978	6,032,806
Secured debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	258,000	200,000
5.875% Senior Notes, due 2014 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	'	255,676
3.875% Senior Note, due 2015 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	510,026	516,204
5.5% Senior Notes, due 2016 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	365,739	373,178
5.125% Senior Notes, due 2018 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	845,310	854,011
8.5% Senior Notes, due 2019 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	839,300	858,425
2.375% Euro Medium Term Notes, due 2020 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	655,129	'
6.875% Senior Note, due 2021 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	856,575	866,801
2.25% Euro Medium Term Notes, due 2022 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	4,605	4,792
5.125% Senior Notes, due 2023 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	623,900	625,626
6.45% Senior Debentures, due 2027 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	381,951	383,224
3.875% Convertible Senior Debentures due 2029 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	350,288	359,281
6.25% Senior Debentures, due 2036 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	513,122	513,343
6.50% Senior Notes, due 2043 [Member] | Unsecured Debt [Member]	'	'
Debt Instrument [Line Items]	'	'
Long-term debt	$422,033	$422,245

LongTerm_Debt_Summary_of_LongT1

Long-Term Debt - Summary of Long-Term Debt Carrying Values Including Unamortized Discounts and Premiums (Parenthetical) (Detail) (USD $)

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

20-May-14

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Nov. 30, 2013

In Millions, unless otherwise specified

5.875% Senior Notes, due 2014 [Member]

3.875% Senior Note, due 2015 [Member]

5.5% Senior Notes, due 2016 [Member]

5.125% Senior Notes, due 2018 [Member]

8.5% Senior Notes, due 2019 [Member]

2.375% Euro Medium Term Notes, due 2020 [Member]

2.375% Euro Medium Term Notes, due 2020 [Member]

6.875% Senior Note, due 2021 [Member]

2.25% Euro Medium Term Notes, due 2022 [Member]

5.125% Senior Notes, due 2023 [Member]

6.45% Senior Debentures, due 2027 [Member]

3.875% Convertible Senior Debentures due 2029 [Member]

6.25% Senior Debentures, due 2036 [Member]

6.50% Senior Notes, due 2043 [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

3.875% Convertible Senior Debentures due 2029 [Member]

3.875% Convertible Senior Debentures due 2029 [Member]

3.875% Convertible Senior Debentures due 2029 [Member]

3.875% Convertible Senior Debentures due 2029 [Member]

3.875% Convertible Senior Debentures due 2029 [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest rate

5.88%

3.88%

5.50%

5.13%

8.50%

2.38%

2.38%

6.88%

2.25%

5.13%

6.45%

3.88%

6.25%

6.50%

'

'

'

'

'

Effective interest rate

1.51%

2.17%

2.52%

3.46%

4.00%

2.42%

'

4.40%

4.08%

4.55%

5.46%

3.50%

6.03%

6.09%

'

'

'

'

'

Convertible Senior debentures includes fair value

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$1.40

'

'

$1.40

$9.60

Consolidated Statement of Earnings (gain) loss amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$2.40

$16.30

$9.20

$8.10

'

Noncontrolling_Interests_and_M2

Noncontrolling Interests and Mandatorily Redeemable Preferred Interests of Consolidated Subsidiaries - Noncontrolling Interests (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Thousands, unless otherwise specified
Noncontrolling Interest [Line Items]	'	'
Noncontrolling interests	$31,209	$117,154
Jefferies Structured Alpha Fund B, LLC [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
Noncontrolling interests	'	115,958
Global Equity Event Opportunity Fund LLC [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
Noncontrolling interests	25,787	'
Other [Member]	'	'
Noncontrolling Interest [Line Items]	'	'
Noncontrolling interests	$5,422	$1,196

Noncontrolling_Interests_and_M3

Noncontrolling Interests and Mandatorily Redeemable Preferred Interests of Consolidated Subsidiaries - Noncontrolling Interests (Parenthetical) (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Feb. 28, 2014	Nov. 30, 2013
Noncontrolling Interest [Abstract]	'	'
Leucadia investment in Jefferies Structured Alpha Fund B, LLC	'	$75
Gain or loss recognized upon deconsolidation	$0	'

Benefit_Plans_Additional_Infor

Benefit Plans - Additional Information (Detail) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Aug. 31, 2014	Nov. 30, 2013
German Pension Plan [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Investment in insurance contract	$18.20	$19.70
Contributions made to pension plan	0	'
German Pension Plan [Member] | November 30, 2014 [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Contributions expected to be made to pension plan	0	'
United States Pension Plan of US Entity [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Contributions made to pension plan	0	'
United States Pension Plan of US Entity [Member] | November 30, 2014 [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Contributions expected to be made to pension plan	$0	'

Benefit_Plans_Components_of_Ne

Benefit Plans - Components of Net Periodic Pension (Benefit) Cost (Detail) (USD $)	3 Months Ended		6 Months Ended	9 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended	3 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2013	Aug. 31, 2014	Feb. 28, 2013	Feb. 28, 2013
	Successor [Member]	Successor [Member]	Successor [Member]	Successor [Member]	Successor [Member]	Successor [Member]	Successor [Member]	Successor [Member]	Predecessor [Member]	Predecessor [Member]
	United States Pension Plan of US Entity [Member]	United States Pension Plan of US Entity [Member]	United States Pension Plan of US Entity [Member]	United States Pension Plan of US Entity [Member]	German Pension Plan [Member]	German Pension Plan [Member]	German Pension Plan [Member]	German Pension Plan [Member]	United States Pension Plan of US Entity [Member]	German Pension Plan [Member]
Components of net periodic pension (income) cost:	'	'	'	'	'	'	'	'	'	'
Service cost	$56	$56	$112	$168	$11	$16	$32	$33	$56	$16
Interest cost on projected benefit obligation	607	557	1,114	1,821	216	220	433	658	529	220
Expected return on plan assets	-789	-680	-1,360	-2,367	'	'	'	'	-665	'
Net amortization	-36	'	'	-108	61	45	89	186	300	45
Net periodic pension (income)/cost	($162)	($67)	($134)	($486)	$288	$281	$554	$877	$220	$281

Compensation_Plans_Additional_

Compensation Plans - Additional Information (Detail) (USD $)	3 Months Ended			6 Months Ended	9 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Feb. 28, 2013	Aug. 31, 2013	Aug. 31, 2014	Nov. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Number of years in which restricted stock awards amortized as compensation expense	'	'	'	'	'4 years	'
Increase in the unrecognized compensation cost	'	'	$45,100,000	'	'	'
Total unrecognized compensation cost related to nonvested share-based awards	112,800,000	'	'	'	112,800,000	'
Employee service share-based compensation, unrecognized compensation costs on nonvested awards, weighted average period of recognition	'	'	'	'	'2 years 1 month 6 days	'
Annual employee contributions	'	'	'	'	21,250	'
Employee service share based compensation plan stock price	'	'	'	'	95.00%	'
Compensation cost related to profit sharing plan	1,200,000	1,300,000	2,600,000	3,000,000	6,000,000	'
Weighted average vesting period	'	'	'	'	'3 years	'
Ratable vesting terms, maximum (in years)	'	'	'	'	'8 years	'
Ratable vesting terms, minimum (in years)	'	'	'	'	'1 year	'
Unamortized portion of compensation expense	249,400,000	'	'	'	249,400,000	185,000,000
Successor [Member]	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Compensation cost associated with deferred cash awards	37,400,000	45,500,000	'	92,500,000	115,600,000	'
Successor [Member] | Restricted Stock Awards [Member]	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Total compensation cost related to share-based compensation plans	18,000,000	20,700,000	'	44,100,000	68,000,000	'
Predecessor [Member]	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Total compensation cost related to share-based compensation plans	'	'	23,505,000	'	'	'
Compensation cost associated with deferred cash awards	'	'	48,200,000	'	'	'
Predecessor [Member] | Restricted Stock Awards [Member]	'	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'	'
Total compensation cost related to share-based compensation plans	'	'	$22,300,000	'	'	'

Earnings_per_Share_Basic_and_D

Earnings per Share - Basic and Diluted Earnings per Common Share (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Feb. 28, 2013
Earnings for basic earnings per common share:	'
Net earnings	$90,842
Net earnings to noncontrolling interests	10,704
Earnings for diluted earnings per common share:	'
Net earnings	90,842
Net earnings to noncontrolling interests	10,704
Predecessor [Member]	'
Earnings for basic earnings per common share:	'
Net earnings	90,842
Net earnings to noncontrolling interests	10,704
Net earnings to common shareholders	80,138
Less: Allocation of earnings to participating securities	5,890
Net earnings available to common shareholders	74,248
Earnings for diluted earnings per common share:	'
Net earnings	90,842
Net earnings to noncontrolling interests	10,704
Net earnings to common shareholders	80,138
Add: Mandatorily redeemable convertible preferred stock dividends	1,016
Less: Allocation of earnings to participating securities	5,882
Net earnings available to common shareholders	$75,272
Shares:	'
Average common shares used in basic computation	213,732
Stock options	2
Mandatorily redeemable convertible preferred stock	4,110
Convertible debt	'
Average common shares used in diluted computation	217,844
Earnings per common share:	'
Basic	$0.35
Diluted	$0.35

Earnings_per_Share_Basic_and_D1

Earnings per Share - Basic and Diluted Earnings per Common Share (Parenthetical) (Detail) (Predecessor [Member], USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Feb. 28, 2013
Predecessor [Member]	'
Earnings Per Share [Line Items]	'
Weighted average shares of participating securities	16,756,000
Dividends declared on participating securities	$1.30

Earnings_per_Share_Additional_

Earnings per Share - Additional Information (Detail) (USD $)	3 Months Ended
	Feb. 28, 2013
Earnings Per Share [Abstract]	'
Dividends per share of common stock declared	$0.08

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	Aug. 31, 2014	Nov. 30, 2013
In Millions, unless otherwise specified
Income Tax Disclosure [Abstract]	'	'
Unrecognized tax benefits	$134.10	$126.80
Unrecognized tax benefits that would impact effective tax rate in future	89.3	85.5
Accrued interest on unrecognized tax benefits	28.4	22.9
Accrued material penalties	$0	$0

Income_Taxes_Earliest_Tax_Year

Income Taxes - Earliest Tax Year Subject to Examination in the Major Tax Jurisdictions in which the Company Operates (Detail)	9 Months Ended
	Aug. 31, 2014
United States [Member]	'
Income Tax Examination [Line Items]	'
Tax Year	'2006
United Kingdom [Member]	'
Income Tax Examination [Line Items]	'
Tax Year	'2012
California [Member]	'
Income Tax Examination [Line Items]	'
Tax Year	'2006
Connecticut [Member]	'
Income Tax Examination [Line Items]	'
Tax Year	'2006
Massachusetts [Member]	'
Income Tax Examination [Line Items]	'
Tax Year	'2010
New Jersey [Member]	'
Income Tax Examination [Line Items]	'
Tax Year	'2007
New York State [Member]	'
Income Tax Examination [Line Items]	'
Tax Year	'2001
New York City [Member]	'
Income Tax Examination [Line Items]	'
Tax Year	'2003

Commitments_Contingencies_and_2

Commitments, Contingencies and Guarantees - Commitments and Contingencies (Detail) (USD $)	Aug. 31, 2014
In Millions, unless otherwise specified
Commitments And Guarantee Obligations [Line Items]	'
2014	$2,953.10
2015	496.8
2016 and 2017	1,147.30
2018 and 2019	101.1
2020 and Later	378.7
Maximum Payout	5,077
Equity commitments [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
2014	1.6
2015	7.6
2016 and 2017	0.9
2020 and Later	355.7
Maximum Payout	365.8
Loan commitments [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
2015	76.7
2016 and 2017	615.8
2018 and 2019	101.1
Maximum Payout	793.6
Mortgage-related commitments [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
2014	976.2
2015	333
2016 and 2017	530.6
Maximum Payout	1,839.80
Forward starting reverse repos and repos [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
2014	1,975.30
Maximum Payout	1,975.30
Other unfunded commitments [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
2015	79.5
2020 and Later	23
Maximum Payout	$102.50

Commitments_Contingencies_and_3

Commitments, Contingencies and Guarantees - Credit Exposure from Loan Commitments (Detail) (USD $)	Aug. 31, 2014
In Millions, unless otherwise specified
Commitments And Guarantee Obligations [Line Items]	'
2014	$1.50
2015-2019	974.4
2020 and Later	'
Total Corporate Lending Exposure	975.9
Corporate Lending Exposure at Fair Value	182.3
Corporate Lending Commitments	793.6
Investment grade [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
2015-2019	55.2
2020 and Later	'
Total Corporate Lending Exposure	55.2
Corporate Lending Commitments	55.2
Non-investment grade [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
2015-2019	88.8
2020 and Later	'
Total Corporate Lending Exposure	88.8
Corporate Lending Exposure at Fair Value	15.6
Corporate Lending Commitments	73.2
Unrated [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
2014	1.5
2015-2019	830.4
2020 and Later	'
Total Corporate Lending Exposure	831.9
Corporate Lending Exposure at Fair Value	166.7
Corporate Lending Commitments	$665.20

Commitments_Contingencies_and_4

Commitments, Contingencies and Guarantees - Credit Exposure from Loan Commitments (Parenthetical) (Detail) (USD $)	Aug. 31, 2014
In Millions, unless otherwise specified
Offsetting [Abstract]	'
Corporate lending exposure included in financial instruments owned	$196.90
Corporate lending exposure carried at fair value included in financial instruments sold	$14.60

Commitments_Contingencies_and_5

Commitments, Contingencies and Guarantees - Additional Information (Detail) (USD $)	1 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Jan. 31, 2013	Aug. 31, 2014
Commitments Contingencies And Guarantees [Line Items]	'	'
Loan commitments outstanding to clients	'	$443.60
Fair value of mortgage-related commitments	'	69.7
Litigation settlement amount	25	'
Litigation reserve	'	3.1
Fair value of derivative contracts approximated deemed to meet the definition of a guarantee	'	65.3
Loan Guarantee	'	0
Maximum amount payable under guarantee	'	21
Loan guarantee matures	'	'2021-01
Standby Letters of Credit [Member]	'	'
Commitments Contingencies And Guarantees [Line Items]	'	'
Letters of credit commitments	'	37.9
Litigation Client [Member]	'	'
Commitments Contingencies And Guarantees [Line Items]	'	'
Litigation settlement amount	11	'
U.S. Attorney Office [Member]	'	'
Commitments Contingencies And Guarantees [Line Items]	'	'
Litigation settlement amount	10	'
Securities and Exchange Commission [Member]	'	'
Commitments Contingencies And Guarantees [Line Items]	'	'
Litigation settlement amount	4	'
Jefferies Capital Partners LLC [Member]	'	'
Commitments Contingencies And Guarantees [Line Items]	'	'
Outstanding Equity Commitments	'	30.5
Other Investments [Member]	'	'
Commitments Contingencies And Guarantees [Line Items]	'	'
Outstanding Equity Commitments	'	$1.80

Commitments_Contingencies_and_6

Commitments, Contingencies and Guarantees - Guarantees (Detail) (USD $)	Aug. 31, 2014
In Millions, unless otherwise specified
Guarantee Obligations [Line Items]	'
Notional/Maximum Payout	$5,077
Derivative contracts - non-credit related [Member]	'
Guarantee Obligations [Line Items]	'
2014	55,067
2015	12,274.70
2016 and 2017	349.4
2018 and 2019	1.1
2020 and Later	521.5
Notional/Maximum Payout	68,213.70
Written derivative contracts - credit related [Member]	'
Guarantee Obligations [Line Items]	'
2016 and 2017	9
2020 and Later	1,541.50
Notional/Maximum Payout	1,550.50
Derivatives [Member]	'
Guarantee Obligations [Line Items]	'
2014	55,067
2015	12,274.70
2016 and 2017	358.4
2018 and 2019	1.1
2020 and Later	2,063
Notional/Maximum Payout	$69,764.20

Commitments_Contingencies_and_7

Commitments, Contingencies and Guarantees - External Credit Ratings of Underlying or Referenced Assets for Credit Related Derivatives Contracts (Detail) (USD $)	Aug. 31, 2014
In Millions, unless otherwise specified
Index credit default swaps [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
External credit ratings	$1,475.50
Single name credit default swaps [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
External credit ratings	75
AAA/Aaa [Member] | Index credit default swaps [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
External credit ratings	1,475.50
AA/Aa [Member] | Index credit default swaps [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
External credit ratings	'
AA/Aa [Member] | Single name credit default swaps [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
External credit ratings	'
A [Member] | Single name credit default swaps [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
External credit ratings	10
BBB/Baa [Member] | Single name credit default swaps [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
External credit ratings	52
Below Investment Grade [Member] | Single name credit default swaps [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
External credit ratings	13
Unrated [Member] | Index credit default swaps [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
External credit ratings	'
Unrated [Member] | Single name credit default swaps [Member]	'
Commitments And Guarantee Obligations [Line Items]	'
External credit ratings	'

Net_Capital_Requirements_Net_C

Net Capital Requirements - Net Capital, Adjusted and Excess Net Capital (Detail) (USD $)	Aug. 31, 2014
In Thousands, unless otherwise specified
Jefferies [Member]	'
Net Capital Requirements [Line Items]	'
Net Capital	$902,855
Excess Net Capital	829,380
Jefferies Execution [Member]	'
Net Capital Requirements [Line Items]	'
Net Capital	5,737
Excess Net Capital	5,487
Jefferies Bache, LLC [Member]	'
Net Capital Requirements [Line Items]	'
Adjusted Net Capital	187,645
Excess Net Capital	$84,003

Net_Capital_Requirements_Addit

Net Capital Requirements - Additional Information (Detail) (USD $)	Aug. 31, 2014
In Millions, unless otherwise specified
Minimum [Member]	'
Net Capital Requirements [Line Items]	'
Minimum net capital requirement	$73
Maximum [Member]	'
Net Capital Requirements [Line Items]	'
Minimum net capital requirement	$103

Segment_Reporting_Additional_I

Segment Reporting - Additional Information (Detail)	9 Months Ended
	Aug. 31, 2014
	Segment
Segment Reporting [Abstract]	'
Number of operating segments	2

Segment_Reporting_Net_Revenues

Segment Reporting - Net Revenues, Expenses and Total Assets by Segment (Detail) (USD $)

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Feb. 28, 2013

Feb. 28, 2013

Feb. 28, 2013

In Thousands, unless otherwise specified

Capital Markets [Member]

Capital Markets [Member]

Asset Management [Member]

Asset Management [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Capital Markets [Member]

Capital Markets [Member]

Capital Markets [Member]

Capital Markets [Member]

Asset Management [Member]

Asset Management [Member]

Asset Management [Member]

Asset Management [Member]

Capital Markets [Member]

Asset Management [Member]

Revenues from External Customers and Long-Lived Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net revenues

'

'

'

'

'

'

$843,309

$531,695

$1,190,133

$2,465,329

$828,500

$515,300

$1,149,900

$2,423,200

$14,800

$16,400

$40,200

$42,100

$818,544

$807,600

$10,900

Expenses

'

'

'

'

'

'

707,674

508,313

1,098,130

2,048,288

697,800

500,100

1,077,500

2,020,600

9,900

8,200

20,600

27,700

668,096

660,600

7,500

Segment assets

$44,764,080

$40,176,996

$44,208,200

$39,276,800

$555,900

$900,200

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Segment_Reporting_Net_Revenues1

Segment Reporting - Net Revenues by Geographic Region (Detail) (USD $)

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

In Thousands, unless otherwise specified

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Feb. 28, 2013

Feb. 28, 2013

Feb. 28, 2013

Feb. 28, 2013

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Americas [Member]

Americas [Member]

Americas [Member]

Americas [Member]

Europe [Member]

Europe [Member]

Europe [Member]

Europe [Member]

Asia [Member]

Asia [Member]

Asia [Member]

Asia [Member]

Americas [Member]

Europe [Member]

Asia [Member]

Revenues:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net revenues

$843,309

$531,695

$1,190,133

$2,465,329

$661,738

$362,240

$884,386

$1,893,723

$153,455

$159,739

$276,782

$500,229

$28,116

$9,716

$28,965

$71,377

$818,544

$663,588

$133,104

$21,852

Related_Party_Transactions_Add

Related Party Transactions - Additional Information (Detail) (USD $)

3 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

6 Months Ended

9 Months Ended

3 Months Ended

12 Months Ended

Share data in Millions, unless otherwise specified

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Nov. 30, 2013

Aug. 31, 2014

Feb. 28, 2013

Aug. 31, 2013

Aug. 31, 2014

Mar. 18, 2014

Nov. 30, 2013

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2014

Aug. 31, 2013

Aug. 31, 2013

Aug. 31, 2014

Feb. 28, 2013

Nov. 30, 2013

Private Equity Related Funds [Member]

Private Equity Related Funds [Member]

Leucadia [Member]

Leucadia [Member]

Leucadia [Member]

Leucadia [Member]

Leucadia [Member]

Leucadia [Member]

National Beef Packaging Company, LLC [Member]

National Beef Packaging Company, LLC [Member]

Harbinger Group Inc [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Successor [Member]

Predecessor [Member]

Predecessor [Member]

Related Party Transaction [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity investments loans in related funds

'

'

$65,300,000

$61,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchase commitments from Berkadia Commercial Mortgage, LLC

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

313,700,000

'

300,000,000

Loan outstanding

'

'

'

'

8,800,000

'

'

8,800,000

'

'

'

'

'

'

'

'

'

'

'

Interest income on loan

'

'

'

'

200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unsettled purchases and sales of loans

'

'

'

'

'

'

'

'

'

'

'

'

223,600,000

'

'

'

'

'

'

Due to related party

'

'

'

'

23,300,000

'

'

23,300,000

'

6,700,000

4,100,000

4,100,000

'

'

'

'

'

'

'

Commissions for conducting brokerage services

700,000

'

'

'

'

'

'

'

'

'

65,000

65,000

'

159,085,000

153,402,000

316,161,000

488,526,000

146,240,000

'

Loans outstanding to certain employees

14,200,000

13,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenue from related parties

'

'

'

'

9,000,000

'

'

26,200,000

'

'

'

'

'

'

'

'

'

'

'

Due from related party

'

'

'

'

11,300,000

'

'

11,300,000

'

2,300,000

'

'

'

'

'

'

'

'

'

Sale of investment, shares

'

'

'

'

'

'

'

'

18.6

'

'

'

'

'

'

'

'

'

'

Earnings associated with their investment

'

'

'

'

'

$61,000

$65,000

'

'

'

'

'

'

'

'

'

'

'

'

Related_Party_Transactions_Sum

Related Party Transactions - Summary of Interest Income, Other Revenues and Investment Income to Private Equity Related Funds (Detail) (Private Equity Related Funds [Member], USD $)	3 Months Ended		6 Months Ended	9 Months Ended	3 Months Ended
In Thousands, unless otherwise specified	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2013	Aug. 31, 2014	Feb. 28, 2013
	Successor [Member]	Successor [Member]	Successor [Member]	Successor [Member]	Predecessor [Member]
Related Party Transaction [Line Items]	'	'	'	'	'
Interest income	'	$339	$837	'	$516
Other revenues and investment (loss) income	$371	$4,005	$3,031	($11,088)	$947