Jefferies 10-Q 10 Jul 15 2015 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - May. 31, 2015 - shares	Total
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	May 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Entity Registrant Name	JEFFERIES GROUP LLC
Entity Central Index Key	1,084,580
Current Fiscal Year End Date	--11-30
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding	0

Consolidated Statements of Fina

Consolidated Statements of Financial Condition (Unaudited) - USD ($) $ in Thousands	May. 31, 2015	Nov. 30, 2014
ASSETS
Cash and cash equivalents ($192 and $178 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	$ 3,288,758	$ 4,079,968
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	2,396,114	3,444,674
Financial instruments owned, at fair value, (including securities pledged of $15,384,622 and $14,794,488 at May 31, 2015 and November 30, 2014, respectively; and $54,999 and $62,990 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	18,843,199	18,636,612
Investments in managed funds	57,840	74,365
Loans to and investments in related parties	745,660	773,141
Securities borrowed	7,839,005	6,853,103
Securities purchased under agreements to resell	3,784,504	3,926,858
Securities received as collateral	9,623	5,418
Receivables:
Brokers, dealers and clearing organizations	2,478,992	2,164,006
Customers	1,215,481	1,250,520
Fees, interest and other ($333 and $363 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	402,276	262,437
Premises and equipment	242,122	251,957
Goodwill	1,660,193	1,662,636
Other assets	1,178,068	1,131,953
Total assets	44,141,835	44,517,648
LIABILITIES AND EQUITY
Short-term borrowings	362,000	12,000
Financial instruments sold, not yet purchased, at fair value	9,195,450	8,881,268
Collateralized financings:
Securities loaned	3,694,620	2,598,487
Securities sold under agreements to repurchase	11,128,443	10,672,157
Other secured financings ($705,653 and $597,999 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	709,567	605,824
Obligation to return securities received as collateral	9,623	5,418
Payables:
Brokers, dealers and clearing organizations	1,549,033	2,280,103
Customers	4,450,110	6,241,965
Accrued expenses and other liabilities ($861 and $589 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	1,121,413	1,273,378
Long-term debt	6,401,934	6,483,617
Total liabilities	38,622,193	39,054,217
EQUITY
Member’s paid-in capital	5,505,304	5,439,256
Accumulated other comprehensive loss:
Currency translation adjustments	(20,874)	(9,654)
Additional minimum pension liability	(4,856)	(5,019)
Total accumulated other comprehensive loss	(25,730)	(14,673)
Total member’s equity	5,479,574	5,424,583
Noncontrolling interests	40,068	38,848
Total equity	5,519,642	5,463,431
Total liabilities and equity	$ 44,141,835	$ 44,517,648

Consolidated Statements of Fin3

Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) - USD ($) $ in Thousands	May. 31, 2015	Nov. 30, 2014
Cash and cash equivalents ($192 and $178 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	$ 3,288,758	$ 4,079,968
Financial instruments owned, at fair value, (including securities pledged of $15,384,622 and $14,794,488 at May 31, 2015 and November 30, 2014, respectively; and $54,999 and $62,990 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	15,384,622	14,794,488
Financial instruments owned, at fair value, (including securities pledged of $15,384,622 and $14,794,488 at May 31, 2015 and November 30, 2014, respectively; and $54,999 and $62,990 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	18,843,199	18,636,612
Fees, interest and other ($333 and $363 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	402,276	262,437
Other secured financings ($705,653 and $597,999 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	709,567	605,824
Accrued expenses and other liabilities ($861 and $589 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	1,121,413	1,273,378
Variable Interest Entities [Member]
Cash and cash equivalents ($192 and $178 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	192	178
Financial instruments owned, at fair value, (including securities pledged of $15,384,622 and $14,794,488 at May 31, 2015 and November 30, 2014, respectively; and $54,999 and $62,990 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	54,999	62,990
Fees, interest and other ($333 and $363 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	333	363
Other secured financings ($705,653 and $597,999 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	705,653	597,999
Accrued expenses and other liabilities ($861 and $589 at May 31, 2015 and November 30, 2014, respectively, related to consolidated VIEs)	$ 861	$ 589

Consolidated Statements of Earn

Consolidated Statements of Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Revenues:
Commissions	$ 173,508	$ 167,378	$ 340,430	$ 329,441
Principal transactions	155,962	183,416	261,439	421,779
Investment banking	404,262	331,149	676,257	745,469
Asset management fees and investment income (loss) from managed funds	5,650	(3,101)	(4,187)	6,856
Interest	240,552	283,540	469,422	532,808
Other	28,576	8,404	48,481	31,473
Total revenues	1,008,510	970,786	1,791,842	2,067,826
Interest expense	216,956	247,794	408,616	445,806
Net revenues	791,554	722,992	1,383,226	1,622,020
Non-interest expenses:
Compensation and benefits	480,770	404,876	845,985	912,775
Non-compensation expenses:
Floor brokerage and clearing fees	58,713	54,020	113,793	103,533
Technology and communications	72,361	70,257	144,748	134,563
Occupancy and equipment rental	24,420	26,673	48,604	53,175
Business development	26,401	24,917	48,338	51,393
Professional services	27,419	25,345	51,675	50,164
Other	16,758	17,767	32,487	35,011
Total non-compensation expenses	226,072	218,979	439,645	427,839
Total non-interest expenses	706,842	623,855	1,285,630	1,340,614
Earnings before income taxes	84,712	99,137	97,596	281,406
Income tax expense	24,530	37,323	24,861	104,200
Net earnings	60,182	61,814	72,735	177,206
Net earnings attributable to noncontrolling interests	349	488	1,220	3,448
Net earnings attributable to Jefferies Group LLC	$ 59,833	$ 61,326	$ 71,515	$ 173,758

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Statement of Comprehensive Income [Abstract]
Net earnings		$ 60,182	$ 61,814	$ 72,735	$ 177,206
Other comprehensive income (loss), net of tax:
Currency translation and other adjustments		(6,726)	2,859	(11,057)	16,643
Total other comprehensive income (loss), net of tax	[1]	(6,726)	2,859	(11,057)	16,643
Comprehensive income		53,456	64,673	61,678	193,849
Net earnings attributable to noncontrolling interests		349	488	1,220	3,448
Comprehensive income attributable to Jefferies Group LLC		$ 53,107	$ 64,185	$ 60,458	$ 190,401
[1]	None of the components of other comprehensive income (loss) are attributable to noncontrolling interests.

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Thousands		Total	Members Paid In Capital [Member]	Accumulated other comprehensive income (loss) [Member]		Noncontrolling interests [Member]
Balance at Nov. 30, 2013			$ 5,280,420	$ 24,100	[1],[2]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings attributable to Jefferies Group LLC			157,560
Tax benefit (detriment) for issuance of share-based awards			1,276
Currency adjustments	[1],[2]			(30,995)
Pension adjustment, net of tax	[1],[2]			(7,778)
Balance at Nov. 30, 2014		$ 5,424,583	5,439,256	(14,673)	[1],[2]
Balance at Nov. 30, 2013						$ 117,154
Noncontrolling interests
Net earnings attributable to noncontrolling interests						3,400
Contributions						39,075
Deconsolidation of asset management company						(120,781)
Balance at Nov. 30, 2014		38,848				38,848
Noncontrolling interests
Total equity		5,463,431
Net earnings attributable to Jefferies Group LLC			71,515
Tax benefit (detriment) for issuance of share-based awards			(5,467)
Currency adjustments		(11,057)		(11,220)	[1],[2]
Pension adjustment, net of tax	[1],[2]			163
Balance at May. 31, 2015		5,479,574	$ 5,505,304	$ (25,730)	[1],[2]
Noncontrolling interests
Net earnings attributable to noncontrolling interests		(1,220)				1,220
Contributions						0
Deconsolidation of asset management company						0
Balance at May. 31, 2015		40,068				$ 40,068
Noncontrolling interests
Total equity		$ 5,519,642
[1]	The components of other comprehensive income (loss) are attributable to Jefferies Group LLC. None of the components of other comprehensive income (loss) are attributable to noncontrolling interests.
[2]	There were no material reclassifications out of Accumulated other comprehensive income during the six months ended May 31, 2015 and the year ended November 30, 2014.

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	May. 31, 2015	May. 31, 2014
Cash flows from operating activities:
Net earnings	$ 72,735	$ 177,206
Adjustments to reconcile net earnings to net cash used in operating activities:
Depreciation and amortization	5,832	(10,052)
Income on loans to and investments in related parties	(49,146)	(37,893)
Distributions received on investments in related parties	58,408	41,260
Other adjustments	(74,394)	(9,588)
Net change in assets and liabilities:
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	1,046,324	329,559
Receivables:
Brokers, dealers and clearing organizations	(322,270)	(497,178)
Customers	33,933	(726,552)
Fees, interest and other	(140,263)	(39,072)
Securities borrowed	(988,097)	(732,449)
Financial instruments owned	(228,076)	(661,495)
Investments in managed funds	16,525	12,469
Securities purchased under agreements to resell	137,998	(852,859)
Other assets	(58,379)	(31,835)
Payables:
Brokers, dealers and clearing organizations	(728,172)	205,669
Customers	(1,785,772)	392,939
Securities loaned	1,098,339	390,165
Financial instruments sold, not yet purchased	325,114	1,071,678
Securities sold under agreements to repurchase	463,962	878,120
Accrued expenses and other liabilities	(144,355)	(88,488)
Net cash used in operating activities	(1,259,754)	(188,396)
Cash flows from investing activities:
Contributions to loans to and investments in related parties	(916,094)	(941,725)
Distributions from loans to and investments in related parties	934,313	1,131,661
Net payments on premises and equipment	(32,433)	(59,595)
Deconsolidation of asset management entity	0	(137,856)
Cash received from contingent consideration	1,706	3,979
Net cash used in investing activities	(12,508)	(3,536)
Cash flows from financing activities:
Excess tax benefits from the issuance of share-based awards	423	1,364
Proceeds from short-term borrowings	9,700,000	6,081,157
Payments on short-term borrowings	(9,350,000)	(6,081,157)
Proceeds from secured credit facility	903,000	655,000
Payments on secured credit facility	(873,000)	(790,000)
Net proceeds from other secured financings	103,743	5,577
Net proceeds from issuance of senior notes, net of issuance costs	0	681,222
Proceeds from contributions of noncontrolling interests	0	31,076
Net cash provided by financing activities	484,166	584,239
Effect of exchange rate changes on cash and cash equivalents	(3,114)	4,862
Net (decrease) increase in cash and cash equivalents	(791,210)	397,169
Cash and cash equivalents at beginning of period	4,079,968	3,561,119
Cash and cash equivalents at end of period	3,288,758	3,958,288
Cash paid during the period for:
Interest	396,667	460,219
Income taxes, net	$ 1,425	$ 60,220

Organization and Basis of Prese

Organization and Basis of Presentation	6 Months Ended
	May. 31, 2015
Accounting Policies [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation Organization Jefferies Group LLC and its subsidiaries operate as a global full service, integrated securities and investment banking firm. The accompanying Consolidated Financial Statements represent the accounts of Jefferies Group LLC 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 International Limited, Jefferies Bache Limited, Jefferies Hong Kong Limited, Jefferies Bache Financial Services, Inc., Jefferies 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 September 1, 2014, Jefferies Bache, LLC merged with and into Jefferies (a U.S. broker-dealer), with Jefferies as the surviving entity. On April 9, 2015, we entered into an agreement to transfer certain of the client activities of our Jefferies Bache business to Société Générale S.A. and initiated a plan to substantially exit the remaining aspects of our futures business. During the three months ended May 31, 2015 , we have transfered about 50% of client accounts to Société Générale S.A. and other brokers. We expect to substantially complete the exit of the Bache business during the third quarter of fiscal 2015. For further information on the exit of the Bache business, refer to Note 21, Exit Costs . Jefferies Group LLC is an indirect wholly owned subsidiary of Leucadia National Corporation (“Leucadia”). Leucadia does not guarantee any of our outstanding debt securities. Our 3.875% Convertible Senior Debentures due 2029 are convertible into Leucadia common shares (see Note 12, Long-Term Debt , for further details). Jefferies Group LLC operates as a full-service investment banking firm and as the holding company of its various regulated and unregulated operating subsidiaries, retains a credit rating separate from Leucadia and is a Securities and Exchange Commission (“SEC”) reporting company, filing annual, quarterly and periodic financial reports. Richard Handler, our Chief Executive Officer and Chairman, is the Chief Executive Officer of Leucadia, as well as a Director of Leucadia. Brian P. Friedman, our Chairman of the Executive Committee, is 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. 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, 2014 . 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. 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 As indicated in our Annual Report on Form 10-K for the year ended November 30, 2014 , we have made adjustments to our historical Consolidated Statement of Cash Flows for the first half of 2014. The adjustments had the impact of decreasing the Net change in Receivables: Brokers, dealers and clearing organization by $30.3 million , increasing the Net change in Receivables: Customers by $30.3 million , increasing the Net change in Payables: Brokers, dealers and clearing organizations by $13.3 million and decreasing the Net change in Payables: Customers by $13.3 million on the Consolidated Statement of Cash Flow for the six months ended May 31, 2014 . 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 the period ended May 31, 2014 .

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	May. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	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, a futures commission merchant (“FCM”), 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 transaction revenues in the Consolidated Statements of Earnings on a trade date basis. Fees received on loans carried at fair value are also recorded within Principal transaction revenues. 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 transaction revenues 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 as an FCM 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 and Fair Value 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 transaction revenues 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, 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 independent sources, 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 services use 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 based on the net asset value ("NAV") of the funds provided by the fund managers with gains or losses included in Asset management fees and investment income (loss) 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 9, Investments , and Note 20, Related Party Transactions , for additional information regarding certain of these investments. 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. The carrying values of internally developed software ready for its intended use are depreciated over the remaining useful life. 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, by comparing the implied fair value of the reporting unit's goodwill to the carrying value of the reporting unit's goodwill. 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 10, Goodwill and Other Intangible Assets , for further information. Income Taxes 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. Pursuant to a tax sharing agreement entered into between us and Leucadia, payments are made between us and Leucadia to settle current tax assets and liabilities. 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 non-vested share-based awards are recognized as an increase to Additional paid-in capital. These amounts, and other windfall tax effects, are included in “Tax benefit (detriment) for issuance of share-based awards” on the Consolidated Statements of Changes in Equity. In the event tax benefits associated with share-based awards are less than the cumulative compensation cost recognized for financial reporting purposes, we look to Leucadia’s consolidated pool of windfall tax benefits in the calculation of our income tax provision. 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 May 31, 2015 , we have reserved approximately $0.7 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 SEC, 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 transaction revenues in the Consolidated Statements of Earnings. Securitization Activities We engage in securitization activities related to corporate loans, consumer 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 transfer

Accounting Developments

Accounting Developments	6 Months Ended
	May. 31, 2015
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Accounting Developments	Accounting Developments Accounting Standards to be Adopted in Future Periods Debt Issuance Costs. In April 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2015-03, Simplifying the Presentation of Debt Issuance Costs. The accounting guidance requires that debt issuance costs related to a recognized debt liability be reported in the Consolidated Statements of Financial Condition as a direct deduction from the carrying amount of that debt liability. The guidance is effective retrospectively beginning in the first quarter of fiscal 2017 and early adoption is permitted. The adoption of this accounting guidance is not expected to have a material impact on our Consolidated Statements of Financial Condition. Consolidation. In February 2015, the FASB issued ASU No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis. The amendment eliminates the deferral of certain consolidation standards for entities considered to be investment companies and modifies the consolidation analysis performed on certain types of legal entities. The guidance is effective beginning in the first quarter of fiscal 2017 and early adoption is permitted. We are currently evaluating the impact of the new guidance on our consolidated financial statements. 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. This accounting change was effective in the second quarter of fiscal 2015. The guidance also requires new disclosures about certain transfers of financial assets accounted for as sales as well as increased transparency about the types of collateral pledged and remaining maturity of repurchase and securities lending agreements. The disclosure guidance related to certain transactions accounted for as sales was effective prospectively in the second quarter of fiscal 2015. The disclosure guidance related to the types of collateral pledged and remaining maturity of repurchase and securities lending agreements is effective prospectively in the third quarter of fiscal 2015. This guidance did not have a material effect on our consolidated financial statements and we 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 (“ASU No. 2014-09”). The accounting guidance defines how companies report revenues from contracts with customers, and also requires enhanced disclosures. The guidance, as stated in ASU No. 2014-09, is effective beginning in the first quarter of fiscal 2018. In July 2015, the FASB confirmed a deferral of the effective date by one year, with early adoption on the original effective date permitted. We are currently evaluating the impact of the new guidance on our consolidated financial statements. Adopted Accounting Standards Investments in Certain Entities That Calculate Net Asset Value. In May 2015, the FASB issued ASU No. 2015-07, “Fair Value Measurement (Topic 820) - Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent)” ("ASU No. 2015-07"). The guidance removes the requirement to include investments in the fair value hierarchy for which the fair value is measured at net asset value ("NAV") using the practical expedient under “Fair Value Measurements and Disclosures (Topic 820).” The guidance also removes the requirement to make certain disclosures for all investments that are eligible to be measured at fair value using the net asset value practical expedient. Rather, those disclosures are limited to investments for which we have elected to measure the fair value using that practical expedient. The guidance is effective retrospectively beginning in the first quarter of fiscal 2017. Early adoption is permitted and we have early adopted this guidance during the second quarter of fiscal 2015. Since the guidance only impacts our disclosures, adoption did not affect our consolidated financial statements. The adjustments had the impact of reducing Level 3 assets by $72.6 million at February 28, 2015, $97.1 million at November 30, 2014, $94.9 million at May 31, 2014, $95.6 million at February 28, 2014 and $91.6 million at November 30, 2013. For further information on the adoption of ASU No. 2015-07, refer to Note 4, Fair Value Disclosures . 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 was effective beginning in the first quarter of 2015. The adoption of this guidance did not have a significant impact on our consolidated financial statements. 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 was effective for fiscal years and interim periods within those years, beginning after December 15, 2013, and is applied prospectively to all unrecognized tax benefits that exist at the effective date. The adoption of this update, effective December 1, 2014, did not have a material effect on our consolidated financial statements.

Fair Value Disclosures

Fair Value Disclosures	6 Months Ended
	May. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Disclosures	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, excluding Investments at fair value based on NAV of $42.5 million and $42.2 million at May 31, 2015 and November 30, 2014 , respectively, by level within the fair value hierarchy (in thousands): May 31, 2015 Level 1(1) Level 2(1) Level 3 Counterparty and Cash Collateral Netting (2) Total Assets: Financial instruments owned: Corporate equity securities $ 2,639,204 $ 187,080 $ 20,547 $ — $ 2,846,831 Corporate debt securities — 3,393,526 31,917 — 3,425,443 Collateralized debt obligations — 166,814 89,007 — 255,821 U.S. government and federal agency securities 2,615,590 307,285 — — 2,922,875 Municipal securities — 638,604 — — 638,604 Sovereign obligations 1,256,242 1,241,493 — — 2,497,735 Residential mortgage-backed securities — 2,809,536 88,695 — 2,898,231 Commercial mortgage-backed securities — 908,809 17,862 — 926,671 Other asset-backed securities — 88,731 11,857 — 100,588 Loans and other receivables — 1,599,819 108,756 — 1,708,575 Derivatives 64,371 4,404,136 40,012 (4,106,430 ) 402,089 Investments at fair value — 718 131,343 — 132,061 Physical commodities — 45,191 — — 45,191 Total financial instruments owned, excluding Investments at fair value based on NAV $ 6,575,407 $ 15,791,742 $ 539,996 $ (4,106,430 ) $ 18,800,715 Cash and cash equivalents $ 3,288,758 $ — $ — $ — $ 3,288,758 Cash and securities segregated and on deposit for regulatory purposes (3) $ 2,396,114 $ — $ — $ — $ 2,396,114 Securities received as collateral $ 9,623 $ — $ — $ — $ 9,623 Liabilities: Financial instruments sold, not yet purchased: Corporate equity securities $ 2,134,344 $ 56,838 $ 38 $ — $ 2,191,220 Corporate debt securities — 1,569,430 452 — 1,569,882 U.S. government and federal agency securities 1,955,173 134,889 — — 2,090,062 Sovereign obligations 1,228,416 848,551 — — 2,076,967 Residential mortgage-backed securities — 48,268 — — 48,268 Loans — 957,597 10,732 — 968,329 Derivatives 38,035 4,380,241 38,426 (4,205,980 ) 250,722 Total financial instruments sold, not yet purchased $ 5,355,968 $ 7,995,814 $ 49,648 $ (4,205,980 ) $ 9,195,450 Obligation to return securities received as collateral $ 9,623 $ — $ — $ — $ 9,623 Other secured financings $ — $ — $ 56,060 $ — $ 56,060 Embedded conversion option $ — $ — $ 725 $ — $ 725 (1) There were no material transfers between Level 1 and Level 2 for the six months ended May 31, 2015 . (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 $525.0 million and Commodities Futures Trading Commission (“CFTC”) approved money market funds with a fair value of $190.0 million . November 30, 2014 Level 1 (1) Level 2 (1) Level 3 Counterparty and Cash Collateral Netting (2) Total Assets: Financial instruments owned: Corporate equity securities $ 2,178,837 $ 226,441 $ 20,964 $ — $ 2,426,242 Corporate debt securities — 3,342,276 22,766 (4) — 3,365,042 Collateralized debt obligations — 306,218 124,650 (4) — 430,868 U.S. government and federal agency securities 2,694,268 81,273 — — 2,775,541 Municipal securities — 590,849 — — 590,849 Sovereign obligations 1,968,747 790,764 — — 2,759,511 Residential mortgage-backed securities — 2,879,954 82,557 — 2,962,511 Commercial mortgage-backed securities — 966,651 26,655 — 993,306 Other asset-backed securities — 137,387 2,294 — 139,681 Loans and other receivables — 1,458,760 97,258 — 1,556,018 Derivatives 65,145 5,046,278 54,190 (4,759,345 ) 406,268 Investments at fair value — 73,148 53,224 — 126,372 Physical commodities — 62,234 — — 62,234 Total financial instruments owned, excluding Investments at fair value based on NAV $ 6,906,997 $ 15,962,233 $ 484,558 $ (4,759,345 ) $ 18,594,443 Cash and cash equivalents $ 4,079,968 $ — $ — $ — $ 4,079,968 Cash and securities segregated and on deposit for regulatory purposes (3) $ 3,444,674 $ — $ — $ — $ 3,444,674 Securities received as collateral $ 5,418 $ — $ — $ — $ 5,418 Liabilities: Financial instruments sold, not yet purchased: Corporate equity securities $ 1,911,145 $ 74,681 $ 38 $ — $ 1,985,864 Corporate debt securities — 1,611,994 223 — 1,612,217 Collateralized debt obligations — 4,557 — — 4,557 U.S. government and federal agency securities 2,253,055 — — — 2,253,055 Sovereign obligations 1,217,075 574,010 — — 1,791,085 Loans — 856,525 14,450 — 870,975 Derivatives 52,778 5,117,803 49,552 (4,856,618 ) 363,515 Total financial instruments sold, not yet purchased $ 5,434,053 $ 8,239,570 $ 64,263 $ (4,856,618 ) $ 8,881,268 Obligation to return securities received as collateral $ 5,418 $ — $ — $ — $ 5,418 Other secured financings $ — $ — $ 30,825 $ — $ 30,825 Embedded conversion option $ — $ — $ 693 $ — $ 693 (1) At December 1, 2013, equity options presented within Financial instruments owned and Financial instruments sold, not yet purchased of $6.1 million and $6.6 million, respectively, were transferred from Level 1 to Level 2 as adjustments were incorporated into the valuation approach for such contracts to estimate the point within the bid-ask range that meets the best estimate of fair value. (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 $453.7 million and CFTC approved money market funds with a fair value of $545.0 million . (4) Level 3 Collateralized debt obligations increased by $33.2 million with a corresponding decrease in Level 3 Corporate debt securities from those previously reported to correct for the classification of certain positions. The total amount of Level 3 assets remained unchanged. 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 of the same or similar security or based on valuations received from third party brokers or data providers and are categorized within Level 2 or Level 3 of the fair value hierarchy depending on the observability and significance of the pricing inputs. Valuation that is based on recently executed market transitions of similar securities incorporates additional review and analysis of pricing inputs and comparability criteria including but not limited to collateral type, tranche type, rating, origination year, prepayment rates, default rates, and severities. 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 Interest-Only and 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: Government National Mortgage Association (“GNMA”) project loans are measured based on inputs corroborated from and benchmarked to observed prices of recent securitization transactions of similar securities with adjustments incorporating an evaluation for various factors, including prepayment speeds, default rates, and cash flow structures as well as the likelihood of pricing levels in the current market environment. Federal National Mortgage Association (“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 Agency Residential Loans: Valuations of participation certificates in agency residential loans are based on observed market prices of recently executed purchases and sales of similar loans. The loan participation certificates are categorized within Level 2 of the fair value hierarchy given the observability and volume of recently executed transactions and availability of data provider pricing. • Project Loans and Participation Certificates in GNMA Project and Construction Loans: Valuations of participation certificates in GNMA project and construction loans are based on inputs corroborated from and benchmarked to observed prices of recent securitizations of assets with similar underlying loan collateral to derive an implied spread. Securitization prices are adjusted to estimate the fair value of the loans incorporating an evaluation for various factors, including prepayment speeds, default rates, and cash flow structures as well as the likelihood of pricing levels in the current market environment. The measurements are categorized within Level 2 of the fair value hierarchy given the observability and volume of recently executed transactions. • Consumer Loans and Funding Facilities: Consumer and small business whole loans and related funding facilities are valued based on observed market transactions incorporating additional valuation inputs including, but not limited to, delinquency and default rates, prepayment rates, borrower characteristics, loan risk grades and loan age. These assets are categorized within Level 2 or Level 3 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, interest rate 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 and forwards, 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 in the Consolidated Statements of Earnings. Investments at Fair Value and Investments in Managed Funds Investments at fair value based on NAV 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 the net asset value of the funds provided by the fund managers and are excluded from 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 May 31, 2015 and November 30, 2014 (in thousands): May 31, 2015 Fair Value (1) Unfunded Commitments Redemption Frequency (if currently eligible) Equity Long/Short Hedge Funds (2) $ 53,360 $ — Monthly, Quarterly Fixed Income and High Yield Hedge Funds (3) 2,679 — — Fund of Funds (4) 339 94 — Equity Funds (5) 41,311 25,670 — Convertible Bond Funds (6) 3,460 — At Will Total (7) $ 101,149 $ 25,764 November 30, 2014 Fair Value (1) Unfunded Commitments Redemption Frequency (if currently eligible) Equity Long/Short Hedge Funds (2) $ 44,983 $ — Monthly, Quarterly Fixed Income and High Yield Hedge Funds (3)(8) 2,704 — — Fund of Funds (4) 323 94 — Equity Funds (5) 65,216 26,023 — Convertible Bond Funds (6) 3,355 — At Will Total (7) $ 116,581 $ 26,117 (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 primarily equity securities in domestic and international markets in both the public and private sectors. At May 31, 2015 and November 30, 2014 , investments representing approximately 100% and 99% , respectively, of the fair value of investments in this category are redeemable with 30 - 90 days prior written notice. (3) Includes investments in funds that invest in loans secured by a first trust deed on property, 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. At May 31, 2015 and November 30, 2014 , the underlying assets of 7% and 8% , respectively, of these 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 May 31, 2015 and November 30, 2014 , approximately 96% and 95% , 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 May 31, 2015 and November 30, 2014 , 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. (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 remaining investments are in liquidation and we are unable to estimate when the underlying assets will be fully liquidated. (7) Investments at fair value within Financial instruments owned in the Consolidated Statements of Financial Condition at May 31, 2015 and November 30, 2014 include $131.2 million and $126.3 million, respectively, of direct investments which do not have the characteristics of investment companies and therefore are not included within this table. (8) Fixed income and high yield hedge funds was revised by $2.5 million from that previously reported due to the inclusion of a fixed income fund, which has the characteristics of an investment company that is included in Investments at fair value within Financial instruments owned in the Consolidated Statement of Financial Condition. The total amount of Investments at fair value remained unchanged. Other Secured Financings Other secured financings that are accounted for at fair value include 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 for similar assets. In addition, at May 31, 2015 and November 30, 2014 , Other secured financings includes $3.9 million and $7.8 million , respectively, 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. 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 May 31, 2015 (in thousands): Three Months Ended May 31, 2015 Balance at February 28, 2015 Total gains/ losses (realized and unrealized) (1) Purchases Sales Settlements Issuances Net transfers into/ (out of) Level 3 Balance at May 31, 2015 Change in unrealized gains/ (losses) relating to instruments still held at May 31, 2015 (1) Assets: Financial instruments owned: Corporate equity securities $ 18,210 $ 8,030 $ — $ (73 ) $ — $ — $ (5,620 ) $ 20,547 $ 8,073 Corporate debt securities 24,795 (532 ) 2,183 (2,368 ) — — 7,839 31,917 (922 ) Collateralized debt obligations 96,837 (5,120 ) 29,021 (25,430 ) — — (6,301 ) 89,007 (2,328 ) Sovereign obligations 333 (12 ) 320 (641 ) — — — — — Residential mortgage-backed securities 79,953 (1,820 ) 8,733 (4,915 ) (323 ) — 7,067 88,695 315 Commercial mortgage-backed securities 24,629 (789 ) 1,256 (9,237 ) (173 ) — 2,176 17,862 (759 ) Other asset-backed securities 7,146 (19 ) 8,322 (80 ) (270 ) — (3,242 ) 11,857 41 Loans and other receivables 111,410 (748 ) 40,602 (26,335 ) (16,314 ) — 141 108,756 (669 ) Investments at fair value 128,232 3,380 73 (78 ) (264 ) — — 131,343 3,482 Liabilities: Financial instruments sold, not yet purchased: Corporate equity securities $ 38 $ — $ — $ — $ — $ — $ — $ 38 $ — Corporate debt securities — 339 — 113 — — — 452 (339 ) Net derivatives (2) 3,314 (4,912 ) (11,963 ) — 12,078 389 (492 ) (1,586 ) 4,912 Loans 9,327 (332 ) (1,170 ) 350 2,557 — — 10,732 332 Other secured financings 65,602 — — — (9,542 ) — — 56,060 — Embedded conversion option 825 (100 ) — — — — — 725 100 (1) Realized and unrealized gains/losses are reported in Principal transaction revenues 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 May 31, 2015 During the three months ended May 31, 2015 , transfers of assets of $98.4 million from Level 2 to Level 3 of the fair value hierarchy are primarily attributed to: • Collateralized debt obligations of $48.0 million, non-agency residential mortgage-backed securities of $30.0 million, commercial mortgage-backed securities of $7.7 million and other asset-backed securities of $2.1 million for which no recent trade activity was observed for purposes of determining observable inputs; • Loans and other receivables of $1.0 million due to a lower number of contributors comprising vendor quotes to support classification within Level 2; • Corporate debt securities of $8.2 million and corporate equity securities of $1.4 million due to a lack of observable market transactions. During the three months ended May 31, 2015 , transfers of assets of $96.4 million from Level 3 to Level 2 are primarily attributed to: • Non-agency residential mortgage-backed securities of $23.0 million, commercial mortgage-backed securities of $5.5 million and other asset-back securities of $5.4 million for which market trades were observed in the period for either identical or similar securities; • Collateralized debt obligations of $54.4 million due to a greater number of contributors for certain vendor quotes supporting classification into Level 2; • Corporate equity securities of $7.0 million due to an increase in observable market transactions. Net gains on Level 3 assets were $2.4 million and net gains on Level 3 liabilities were $5.0 million for the three months ended May 31, 2015 . Net gains on Level 3 assets were primarily due to increased valuations of corporate equity securities and investments at fair value, partially offset by a decrease in valuation of collateralized debt obligations, residential and commercial mortgage-backed securities and loans and other receivables. Net gains on Level 3 liabilities were primarily due to decreased 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 six months ended May 31, 2015 (in thousands): Six Months Ended May 31, 2015 Balance at November 30, 2014 Total gains/ losses (realized and unrealized) (1) Purchases Sales Settlements Issuances Net transfers into/ (out of) Level 3 Balance at May 31, 2015 Change in unrealized gains/ (losses) relating to instruments still held at May 31, 2015 (1) Assets: Financial instruments owned: Corporate equity securities $ 20,964 $ 7,066 $ 1,469 $ (262 ) $ — $ — $ (8,690 ) $ 20,547 $

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	May. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	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. Derivative Financial Instruments Our derivative activities are recorded at fair value in the Consolidated Statements of Financial Condition in Financial instruments owned and Financial instruments sold, not yet purchased, 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 transaction revenues 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 4, Fair Value Disclosures , and Note 17, Commitments, Contingencies and Guarantees for additional disclosures about derivative financial 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 May 31, 2015 and November 30, 2014 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 6, 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 U.S. 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). May 31, 2015 (1) Assets Liabilities Fair Value Number of Fair Value Number of Interest rate contracts Exchange-traded $ 2,892 61,924 $ 1,581 103,802 Cleared OTC 1,898,174 2,681 1,895,708 2,963 Bilateral OTC 736,995 1,689 702,048 1,455 Foreign exchange contracts Exchange-traded — 624 — 590 Bilateral OTC 645,414 10,656 655,504 9,780 Equity contracts Exchange-traded 917,466 2,909,384 857,264 2,819,750 Bilateral OTC 53,815 1,056 110,662 1,208 Commodity contracts Exchange-traded 57,831 709,590 34,881 712,279 Bilateral OTC 134,645 2,807 117,082 2,571 Credit contracts Cleared OTC 47,813 45 51,038 39 Bilateral OTC 13,474 68 30,934 47 Total gross derivative assets/ liabilities: Exchange-traded 978,189 893,726 Cleared OTC 1,945,987 1,946,746 Bilateral OTC 1,584,343 1,616,230 Amounts offset in the Consolidated Exchange-traded (887,594 ) (887,594 ) Cleared OTC (1,912,437 ) (1,912,437 ) Bilateral OTC (1,306,399 ) (1,405,949 ) Net amounts per Consolidated $ 402,089 $ 250,722 (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, 2014 (1) Assets Liabilities Fair Value Number of Contracts Fair Value Number of Contracts Interest rate contracts Exchange-traded $ 2,450 67,437 $ 1,400 87,008 Cleared OTC 1,425,375 2,160 1,481,329 2,124 Bilateral OTC 871,982 1,908 809,962 729 Foreign exchange contracts Exchange-traded — 1,562 — 1,821 Bilateral OTC 1,514,881 11,299 1,519,349 10,931 Equity contracts Exchange-traded 1,011,101 2,269,044 987,531 2,049,513 Bilateral OTC 39,889 2,463 70,484 1,956 Commodity contracts Exchange-traded 62,091 1,027,542 51,145 1,015,894 Bilateral OTC 214,635 4,026 252,061 4,524 Credit contracts Cleared OTC 17,831 27 23,264 22 Bilateral OTC 5,378 18 23,608 27 Total gross derivative assets/liabilities: Exchange-traded 1,075,642 1,040,076 Cleared OTC 1,443,206 1,504,593 Bilateral OTC 2,646,765 2,675,464 Amounts offset in the Consolidated Statements of Financial Condition (2): Exchange-traded (1,038,992 ) (1,038,992 ) Cleared OTC (1,416,613 ) (1,416,613 ) Bilateral OTC (2,303,740 ) (2,401,013 ) Net amounts per Consolidated Statements of Financial Condition (3) $ 406,268 $ 363,515 (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 six months ended May 31, 2015 and 2014 (in thousands): Three Months Ended Six Months Ended Gains (Losses) May 31, 2015 May 31, 2014 May 31, 2015 May 31, 2014 Interest rate contracts $ 18,064 $ (61,367 ) $ (24,728 ) $ (66,485 ) Foreign exchange contracts 8,352 (3,718 ) 23,524 2,348 Equity contracts (111,682 ) (73,925 ) (40,641 ) (170,161 ) Commodity contracts 5,746 21,793 20,237 37,980 Credit contracts 9,805 (11,745 ) 3,763 (15,623 ) Total $ (69,715 ) $ (128,962 ) $ (17,845 ) $ (211,941 ) OTC Derivatives. The following tables set forth by remaining contract maturity the fair value of OTC derivative assets and liabilities at May 31, 2015 (in thousands): OTC Derivative Assets (1) (2) (3) 0 – 12 Months 1 – 5 Years Greater Than 5 Years Cross-Maturity Netting (4) Total Commodity swaps, options and forwards $ 50,402 $ 1,592 $ 21,717 $ (3,562 ) $ 70,149 Equity swaps and options 12,791 13,371 5,349 — 31,511 Credit default swaps — 2,045 7,067 (1,519 ) 7,593 Total return swaps 10,160 2,635 — (2,564 ) 10,231 Foreign currency forwards, swaps and options 143,252 30,561 — (13,178 ) 160,635 Interest rate swaps, options and forwards 47,927 155,590 95,763 (64,051 ) 235,229 Total $ 264,532 $ 205,794 $ 129,896 $ (84,874 ) 515,348 Cross product counterparty netting (16,998 ) Total OTC derivative assets included in Financial instruments owned $ 498,350 (1) At May 31, 2015 , we held exchange traded derivative assets and other credit agreements with a fair value of $94.1 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 May 31, 2015 , cash collateral received was $190.4 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 5 Years Cross-Maturity Netting (4) Total Commodity swaps, options and forwards $ 51,982 $ 693 $ 3,474 $ (3,562 ) $ 52,587 Equity swaps and options 28,147 37,353 15,332 — 80,832 Credit default swaps 1,064 1,334 5,636 (1,519 ) 6,515 Total return swaps 21,311 9 1,489 (2,564 ) 20,245 Foreign currency forwards, swaps and options 121,295 62,607 — (13,178 ) 170,724 Fixed income forwards 278 — — — 278 Interest rate swaps, options and forwards 45,926 96,089 120,986 (64,051 ) 198,950 Total $ 270,003 $ 198,085 $ 146,917 $ (84,874 ) 530,131 Cross product counterparty netting (16,998 ) Total OTC derivative liabilities included in Financial instruments sold, not yet purchased $ 513,133 (1) At May 31, 2015 , we held exchange traded derivative liabilities and other credit agreements with a fair value of $27.7 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 May 31, 2015 , cash collateral pledged was $290.1 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 May 31, 2015 , 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 $ 178,941 BBB- to BBB+ 129,161 BB+ or lower 84,507 Unrated 105,741 Total $ 498,350 (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 May 31, 2015 and November 30, 2014 is $106.1 million and $269.0 million , respectively, for which we have posted collateral of $97.9 million and $234.6 million , respectively, in the normal course of business. If the credit-risk-related contingent features underlying these agreements were triggered on May 31, 2015 and November 30, 2014 , we would have been required to post an additional $10.8 million and $55.1 million , respectively, of collateral to our counterparties.

Collateralized Transactions

Collateralized Transactions	6 Months Ended
	May. 31, 2015
Banking and Thrift [Abstract]
Collateralized Transactions	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 May 31, 2015 and November 30, 2014 , the approximate fair value of securities received as collateral by us that may be sold or repledged was $26.7 billion and $25.8 billion , respectively. At May 31, 2015 and November 30, 2014 , 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 May 31, 2015 and November 30, 2014 , $9.6 million and $5.4 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 U.S. 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 5, Derivative Financial Instruments , for information related to offsetting of derivatives. May 31, 2015 Gross Amounts Netting in Consolidated Statement of Financial Condition Net Amounts in Consolidated Statement of Financial Condition Additional Amounts Available for Setoff (1) Available Collateral (2) Net Amount (3) Assets Securities borrowing arrangements $ 7,839,005 $ — $ 7,839,005 $ (545,998 ) $ (921,694 ) $ 6,371,313 Reverse repurchase agreements 13,695,209 (9,910,705 ) 3,784,504 (261,671 ) (3,492,047 ) 30,786 Liabilities Securities lending arrangements $ 3,694,620 $ — $ 3,694,620 $ (545,998 ) $ (3,104,520 ) $ 44,102 Repurchase agreements 21,039,148 (9,910,705 ) 11,128,443 (261,671 ) (9,099,025 ) 1,767,747 November 30, 2014 Gross Amounts Netting in Consolidated Statement of Financial Condition Net Amounts in Consolidated Statement of Financial Condition Additional Amounts Available for Setoff (1) Available Collateral (2) Net Amount (4) Assets Securities borrowing arrangements $ 6,853,103 $ — $ 6,853,103 $ (680,222 ) $ (1,274,196 ) $ 4,898,685 Reverse repurchase agreements 14,059,133 (10,132,275 ) 3,926,858 (634,568 ) (3,248,817 ) 43,473 Liabilities Securities lending arrangements $ 2,598,487 $ — $ 2,598,487 $ (680,222 ) $ (1,883,140 ) $ 35,125 Repurchase agreements 20,804,432 (10,132,275 ) 10,672,157 (634,568 ) (8,810,770 ) 1,226,819 (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 $6,327.5 million of securities borrowing arrangements, for which we have received securities collateral of $6,143.2 million , and $1,750.5 million of repurchase agreements, for which we have pledged securities collateral of $1,802.5 million , which are subject to master netting agreements but we have not yet determined the agreements to be legally enforceable. (4) Amounts include $4,847.4 million of securities borrowing arrangements, for which we have received securities collateral of $4,694.0 million , and $1,201.9 million of repurchase agreements, for which we have pledged securities collateral of $1,238.4 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 $2,396.1 million and $3,444.7 million at May 31, 2015 and November 30, 2014 , 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 as an FCM to segregation requirements.

Securitization Activities

Securitization Activities	6 Months Ended
	May. 31, 2015
Transfers and Servicing [Abstract]
Securitization Activities	Securitization Activities We engage in securitization activities related to corporate loans, commercial mortgage loans, consumer 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 8, 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): Three Months Ended May 31, Six Months Ended May 31, 2015 2014 2015 2014 Transferred assets $ 1,490.6 $ 1,599.7 $ 3,053.5 $ 3,226.6 Proceeds on new securitizations 1,527.1 1,600.1 3,091.6 3,228.2 Cash flows received on retained interests 12.2 20.4 19.0 28.9 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 May 31, 2015 and November 30, 2014 . The following tables summarize our retained interests in SPEs where we transferred assets and have continuing involvement and received sale accounting treatment (in millions): May 31, 2015 Securitization Type Total Assets Retained Interests U.S. government agency residential mortgage-backed securities $ 10,986.6 $ 139.5 U.S. government agency commercial mortgage-backed securities 3,022.9 85.8 Collateralized loan obligations 4,677.1 61.6 November 30, 2014 Securitization Type Total Assets Retained Interests U.S. government agency residential mortgage-backed securities $ 19,196.9 $ 226.9 U.S. government agency commercial mortgage-backed securities 5,848.5 204.7 Collateralized loan obligations 4,511.8 108.4 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 we purchased securities through these market-marking activities 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 section presented in Note 8, 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 $3.9 million and $3.9 million , respectively, at May 31, 2015 and $7.8 million and $7.8 million , respectively, at November 30, 2014 . The related liabilities do not have recourse to our general credit.

Variable Interest Entities

Variable Interest Entities	6 Months Ended
	May. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Variable Interest Entities	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, corporate and consumer 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 May 31, 2015 and November 30, 2014 (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. May 31, 2015 November 30, 2014 Securitization Other Securitization Other Cash $ — $ 0.2 $ — $ 0.2 Financial instruments owned 54.7 0.3 62.7 0.3 Securities purchased under agreement to resell (1) 654.1 — 575.2 — Fees, interest and other receivables 0.3 — 0.4 — $ 709.1 $ 0.5 $ 638.3 $ 0.5 Other secured financings (2) $ 708.2 $ — $ 637.7 $ — Other liabilities 0.9 0.2 0.6 0.2 $ 709.1 $ 0.2 $ 638.3 $ 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 $2.6 million and $39.7 million of the secured financing represents an amount held by us in inventory and is eliminated in consolidation at May 31, 2015 and November 30, 2014 , 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 and the assets of the VIE are not available to satisfy any other debt. We are also the primary beneficiary of mortgage-backed financing vehicles to which we sell agency and non-agency residential and commercial mortgage loans and 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 and each such VIE's assets are not available to satisfy any other debt. 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 and each such VIE's assets are not available to satisfy any other debt. Nonconsolidated VIEs The following tables present information about our variable interests in nonconsolidated VIEs (in millions): May 31, 2015 Carrying Amount Maximum Assets Liabilities Exposure to loss VIE Assets Collateralized loan obligations $ 84.6 $ — $ 373.9 $ 5,659.6 Consumer loan vehicles 171.0 — 1,116.2 609.2 Asset management vehicle (1) 6.9 — 6.9 49.0 Private equity vehicles (2) 24.3 — 48.9 72.0 Total $ 286.8 $ — $ 1,545.9 $ 6,389.8 November 30, 2014 Carrying Amount Maximum Assets Liabilities Exposure to loss VIE Assets Collateralized loan obligations $ 134.0 $ — $ 926.9 $ 7,737.1 Consumer loan vehicles 170.6 — 797.8 485.2 Asset management vehicle (1) 11.3 — 11.3 432.3 Private equity vehicles (2) 44.3 — 59.2 92.8 Total $ 360.2 $ — $ 1,795.2 $ 8,747.4 (1) Assets consist of equity interests, which are included within Investments in managed funds, and accrued management and performance fees, which are included within Receivables: Fees, interest and other. (2) 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, • Trading positions in 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 incentive 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 Vehicles. We provide financing and lending related services to certain client-sponsored VIEs in the form of revolving funding note agreements, revolving credit facilities and forward purchase agreements. The underlying assets, which are collateralizing the vehicles, are primarily comprised of unsecured consumer and small business loans. 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 managed the Jefferies Umbrella Fund, an "Umbrella structure" company that invested primarily in convertible bonds and enabled investors to choose between one or more investment objectives by investing in one or more sub-funds within the same structure. Our variable interests in the Jefferies Umbrella Fund consist of equity interests, management fees and performance fees. Effective May 2015, the Jefferies Umbrella Fund was placed into liquidation. 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 L.P.”). At May 31, 2015 and November 30, 2014 , we funded approximately $60.4 million and $60.1 million , respectively, of our commitment. The carrying amount of our equity investment was $23.2 million and $43.1 million at May 31, 2015 and November 30, 2014 , respectively. Our exposure to loss is limited to our equity commitment. The SBI USA Fund L.P. 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 $1.1 million and $1.2 million at May 31, 2015 and November 30, 2014 , respectively. Our exposure to loss is limited to our equity investment. JEP IV has assets consisting primarily of private equity and equity related investments. We have provided a guarantee of a portion of Energy Partners I, LP's obligations under a credit agreement. Energy Partners I, LP, is a private equity fund owned and managed by our employees. At May 31, 2015 , the carrying value and maximum exposure to loss of the guarantee was $0 and $10.0 million , respectively. Energy Partners I, LP, has assets consisting primarily of debt and equity 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 May 31, 2015 and November 30, 2014 , we held $3,098.7 million and $3,186.9 million of agency mortgage-backed securities, respectively, and $983.7 million and $1,120.0 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	6 Months Ended
	May. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Investments	Investments We have investments in Jefferies Finance, LLC (“Jefferies Finance”) and Jefferies LoanCore LLC (“Jefferies LoanCore”). 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. We have limited partnership interests of 11% and 50% in Jefferies Capital Partners V L.P. and the SBI USA Fund L.P. (together, “JCP Fund V”), respectively, which are private equity funds managed by a team led by Brian P. Friedman, one of our directors and our Chairman of the Executive Committee. Jefferies Finance On October 7, 2004, we entered into an agreement with Massachusetts Mutual Life Insurance Company (“MassMutual”) and Babson Capital Management LLC (“Babson Capital”) 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. Jefferies Finance may 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. At May 31, 2015 , we and MassMutual each have equity commitments to Jefferies Finance of $600.0 million for a combined total commitment of $1.2 billion . At May 31, 2015 , we have funded $486.5 million of our $600.0 million commitment, leaving $113.5 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 Secured Revolving Credit Facility is $1.0 billion , comprised of committed and discretionary amounts totaling $700.0 million and $300.0 million , respectively, at May 31, 2015 . Committed advances are shared equally between us and MassMutual, while discretionary advances may be funded disproportionately if so 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 May 31, 2015 and November 30, 2014 , we have funded $0 and $0 , respectively, of each of our $350.0 million commitments. During the three and six months ended May 31, 2015 , $59,000 and $0.5 million of interest income, respectively, and unfunded commitment fees of $0.4 million and $0.8 million , respectively, are included in the Consolidated Statements of Earnings related to the Secured Revolving Credit Facility. During the three and six months ended May 31, 2014 , we earned interest income of $0.6 million and $1.1 million , respectively, and unfunded commitment fees of $0.4 million and $1.1 million , respectively. The following is a summary of selected financial information for Jefferies Finance (in millions): May 31, 2015 November 30, 2014 Total assets $ 6,853.1 $ 5,954.0 Total liabilities 5,879.5 4,961.7 Total equity 973.6 992.3 Our total equity balance 486.8 496.0 The net earnings of Jefferies Finance were $41.2 million and $62.3 million for the three and six months ended May 31, 2015 , respectively, and $29.3 million and $58.5 million for the three and six months ended May 31, 2014 , 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 fees of $39.9 million and $55.5 million during the three and six months ended May 31, 2015 , respectively, and $38.8 million and $86.4 million during the three and six months ended May 31, 2014 , respectively, recognized in Investment banking revenues in the Consolidated Statements of Earnings. In addition, we paid fees to Jefferies Finance in respect of certain loans originated by Jefferies Finance of $0.9 million and $1.6 million during the three and six months ended May 31, 2015 , respectively, and $3.4 million and $7.7 million during the three and six months ended May 31, 2014 , respectively, which are recognized as Business development expenses in the Consolidated Statements of Earnings. We acted as placement agent in connection with several CLOs managed by Jefferies Finance for which we recognized fees of $3.1 million and $3.1 million during the three and six months ended May 31, 2015 , respectively, and $1.8 million and $2.2 million during the three and six months ended May 31, 2014 , respectively, which are included in Investment banking revenues on the Consolidated Statement of Earnings. At May 31, 2015 and November 30, 2014 , we held securities issued by CLOs managed by JFIN, which are included within Financial instruments owned, and provided a guarantee whereby we are required to make certain payments to a CLO in the event that Jefferies Finance is unable to meet its obligations to the CLO. Additionally, we have entered into participation agreements with Jefferies Finance or derivative contracts whose underlying is based on certain securities issued by the CLO. We acted as underwriter in connection with senior notes issued by Jefferies Finance, for which we recognized underwriting fees of $1.3 million and $4.2 million for the three months ended May 31, 2015 and 2014, respectively. Under a service agreement, we charged Jefferies Finance $7.1 million and $34.9 million for services provided during the three and six months ended May 31, 2015 , respectively, and $7.0 million and $28.7 million during the three and six months ended May 31, 2014 , respectively. Receivables from Jefferies Finance, included within Other assets on the Consolidated Statements of Financial Condition, were $57.1 million and $41.5 million at May 31, 2015 and November 30, 2014 , 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 U.S. 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 May 31, 2015 and November 30, 2014 , we had funded $125.6 million and $200.9 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): May 31, 2015 November 30, 2014 Total assets $ 1,887.2 $ 1,500.9 Total liabilities 1,386.6 962.7 Total equity 500.6 538.2 Our total equity balance 242.8 261.0 The net earnings of Jefferies LoanCore were $16.8 million and $36.8 million for the three and six months ended May 31, 2015 , respectively, and $6.8 million and $11.8 million for the three and six months ended May 31, 2014 , respectively. In connection with the securitization of commercial real estate loans originated by Jefferies LoanCore, we earned placement fees of $0.2 million and $0.6 million during the three and six months ended May 31, 2015 , respectively, and $0.3 million and $0.6 million during the three and six months ended May 31, 2014 , respectively. JCP Fund V The amount of our investments in JCP Fund V included within Investments in managed funds on the Consolidated Statements of Financial Condition was $26.3 million and $48.9 million at May 31, 2015 and November 30, 2014 , respectively. We account for these investments at fair value based on the net asset value ("NAV") of the funds provided by the fund managers (see Note 2, Summary of Significant Accounting Policies ). Gains from these investments were $0.6 million in the three months ended May 31, 2015 and losses from these investments were $22.9 million for the six months ended May 31, 2015 , and $6.6 million and $8.0 million for the three and six months ended May 31, 2014 , respectively, and are included in Asset management fees and investment income (loss) from managed funds in the Consolidated Statements of Earnings. At May 31, 2015 , our outstanding commitment relating to JCP Fund V was $ 16.6 million. At May 31, 2015 and November 30, 2014, we were committed to invest equity of up to $85.0 million in JCP Fund V. The following is a summary of selected financial information for 100% of JCP Fund V, in which we own effectively 35.2% of the combined equity interests (in thousands): March 31, 2015 (1) December 31, 2014 (1) Total assets $ 74,759 $ 73,261 Total liabilities 86 66 Total partners' capital 74,673 73,195 Three months ended March 31, 2015 (1) Three months ended Three months ended March 31, 2014 (1) Three months ended Net increase (decrease) in net assets resulting from operations $ 1,478 $ (65,700 ) $ (18,779 ) $ (2,947 ) (1) Financial information for JCP Fund V within our financial position and results of operations at May 31, 2015 and November 30, 2014 and for the three and six months ended May 31, 2015 and 2014 is included based on the presented periods.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	May. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill Goodwill attributed to our reportable segments are as follows (in thousands): May 31, 2015 November 30, 2014 Capital Markets $ 1,657,193 $ 1,659,636 Asset Management 3,000 3,000 Total goodwill $ 1,660,193 $ 1,662,636 The following table is a summary of the changes to goodwill for the six months ended May 31, 2015 (in thousands): Balance at November 30, 2014 $ 1,662,636 Add: Translation adjustments (2,443 ) Balance at May 31, 2015 $ 1,660,193 Intangible Assets The following tables present the gross carrying amount, accumulated amortization, net carrying amount and weighted average amortization period of identifiable intangible assets at May 31, 2015 and November 30, 2014 (in thousands): May 31, 2015 Weighted average remaining lives (years) Gross cost Accumulated amortization Net carrying amount Customer relationships $ 127,944 $ (30,614 ) $ 97,330 13.3 Trade name 131,587 (8,459 ) 123,128 32.8 Exchange and clearing organization membership interests and registrations 14,448 — 14,448 N/A $ 273,979 $ (39,073 ) $ 234,906 November 30, 2014 Weighted Gross cost Accumulated Net carrying Customer relationships $ 128,323 $ (26,402 ) $ 101,921 13.7 Trade name 132,009 (6,677 ) 125,332 33.3 Exchange and clearing organization membership interests and registrations 14,528 — 14,528 N/A $ 274,860 $ (33,079 ) $ 241,781 Amortization Expense For finite life intangible assets, aggregate amortization expense amounted to $3.0 million and $6.1 million for the three and six months ended May 31, 2015 , respectively, and $3.2 million and $6.4 million for the three and six months ended May 31, 2014 , respectively, which is included in Other expenses on the Consolidated Statements of Earnings. The estimated future amortization expense for the five succeeding fiscal years is as follows (in thousands): Remainder of fiscal 2015 $ 6,099 Year ended November 30, 2016 12,198 Year ended November 30, 2017 12,198 Year ended November 30, 2018 12,198 Year ended November 30, 2019 12,198

Short-Term Borrowings

Short-Term Borrowings	6 Months Ended
	May. 31, 2015
Debt Disclosure [Abstract]
Short-Term Borrowings	Short-Term Borrowings Short-term borrowings include bank loans that are payable on demand, as well as borrowings under revolving credit facilities that 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 May 31, 2015 and November 30, 2014 were $362.0 million and $12.0 million , respectively. At May 31, 2015 , the interest rate on short-term borrowings outstanding is 2.03% per annum. Average daily short-term borrowings outstanding were $77.0 million and $58.2 million for the three and six months ended May 31, 2015 , respectively, and $181.3 million and $97.6 million for the three and six months ended May 31, 2014 , respectively. On April 23, 2015, we entered into a committed revolving credit facility (“Intraday Credit Facility”) with the Bank of New York Mellon. The Bank of New York Mellon agrees to make revolving intraday credit advances for an aggregate committed amount of $500.0 million in U.S. dollars. The term of the Intraday Credit Facility is six months after the closing date, but can be extended for additional six months upon request. The Intraday Credit Facility contains a financial covenant, which includes a minimum regulatory net capital requirement. Interest is based on the higher of the Federal funds effective rate plus 0.5% or the prime rate. At May 31, 2015, we were in compliance with debt covenants under the Intraday Credit Facility.

Long-Term Debt

Long-Term Debt	6 Months Ended
	May. 31, 2015
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt The following summarizes our long-term debt carrying values (including unamortized discounts and premiums and valuation adjustment, where applicable) at May 31, 2015 and November 30, 2014 (in thousands): May 31, November 30, 2014 Unsecured Long-Term Debt 3.875% Senior Notes, due November 9, 2015 (effective interest rate of 2.17%) $ 503,746 $ 507,944 5.5% Senior Notes, due March 15, 2016 (effective interest rate of 2.52%) 358,159 363,229 5.125% Senior Notes, due April 13, 2018 (effective interest rate of 3.46%) 836,381 842,359 8.5% Senior Notes, due July 15, 2019 (effective interest rate of 4.00%) 819,594 832,797 2.375% Euro Medium Term Notes, due May 20, 2020 (effective rate of 2.42%) 548,005 620,725 6.875% Senior Notes, due April 15, 2021 (effective interest rate of 4.40%) 846,007 853,091 2.25% Euro Medium Term Notes, due July 13, 2022 (effective rate of 4.08%) 3,895 4,379 5.125% Senior Notes, due January 20, 2023 (effective interest rate of 4.55%) 622,114 623,311 6.45% Senior Debentures, due June 8, 2027 (effective interest rate of 5.46%) 380,626 381,515 3.875% Convertible Senior Debentures, due November 1, 2029 (effective interest rate of 3.50%) (1) 348,706 349,261 6.25% Senior Debentures, due January 15, 2036 (effective interest rate of 6.03%) 512,891 513,046 6.50% Senior Notes, due January 20, 2043 (effective interest rate of 6.09%) 421,810 421,960 $ 6,201,934 $ 6,313,617 Secured Long-Term Debt Credit facility 200,000 170,000 $ 6,401,934 $ 6,483,617 (1) The value of the 3.875% Convertible Senior debentures at May 31, 2015 and November 30, 2014 includes the fair value of the conversion feature of $0.7 million and $0.7 million , respectively. The change in fair value of the conversion feature, which is included within Principal transaction revenues in the Consolidated Statements of Earnings, was not material for the three and six months ended May 31, 2015 , and amounted to a gain of $3.7 million and $5.7 million for the three and six months ended May 31, 2014 , respectively. Our 3.875% convertible debentures due 2029 (principal amount of $345.0 million ) (the “debentures”) remain issued and outstanding and are convertible into common shares of Leucadia. At June 11, 2015, each $1,000 debenture is currently convertible into 22.3089 shares of Leucadia’s common stock (equivalent to a conversion price of approximately $44.83 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 five 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 in the Consolidated Statements 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. Jefferies is the surviving entity, and therefore, 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 May 31, 2015 and November 30, 2014 , borrowings under the Credit Facility were denominated in U.S. dollars and we were in compliance with debt covenants under the Credit Facility. We expect to terminate the Credit Facility in the third quarter of fiscal 2015, due to the exiting of the Bache business. For further information with respect to our use of the Credit Facility, refer to Note 21, Exit Costs .

Noncontrolling Interests

Noncontrolling Interests	6 Months Ended
	May. 31, 2015
Noncontrolling Interest [Abstract]
Noncontrolling Interests	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 May 31, 2015 and November 30, 2014 (in thousands): May 31, 2015 November 30, 2014 Global Equity Event Opportunity Fund, LLC (1) $ 34,245 $ 33,303 Other 5,823 5,545 Noncontrolling interests $ 40,068 $ 38,848 (1) Noncontrolling interests attributed to Leucadia were $26.1 million and $25.4 million at May 31, 2015 and November 30, 2014 , respectively.

Benefit Plans

Benefit Plans	6 Months Ended
	May. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Benefit Plans	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 in the Consolidated Statements of Financial Condition and has a fair value of $15.5 million and $18.1 million at May 31, 2015 and November 30, 2014 , 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 (income) cost for our pension plans are as follows (in thousands): Three Months Ended May 31, Six Months Ended May 31, U.S. Pension Plan 2015 2014 2015 2014 Components of net periodic pension (income) cost: Service cost $ 63 $ 56 $ 126 $ 112 Interest cost on projected benefit obligation 585 607 1,170 1,214 Expected return on plan assets (848 ) (789 ) (1,696 ) (1,578 ) Net amortization — (36 ) — (72 ) Net periodic pension income $ (200 ) $ (162 ) $ (400 ) $ (324 ) Three Months Ended May 31, Six Months Ended May 31, German Pension Plan 2015 2014 2015 2014 Components of net periodic pension cost: Service cost $ — $ 11 $ — $ 22 Interest cost on projected benefit obligation 127 221 263 442 Net amortization 79 63 163 125 Net periodic pension cost $ 206 $ 295 $ 426 $ 589 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 no t contribute to the U.S. Pension Plan or the German Pension Plan during the six months ended May 31, 2015 and we do no t expect to make any contributions to the plans during the remainder of the fiscal year.

Compensation Plans

Compensation Plans	6 Months Ended
	May. 31, 2015
Compensation Related Costs [Abstract]
Compensation Plans	Compensation Plans Leucadia sponsors our following share-based compensation plans: Incentive Compensation Plan, Employee Stock Purchase Plan and the Deferred Compensation Plan. The outstanding and future share-based awards relating to these plans 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 components of total compensation cost associated with certain of our compensation plans are as follows (in millions): Three Months Ended May 31, Six Months Ended May 31, 2015 2014 2015 2014 Components of compensation cost: Restricted cash awards $ 48.2 35.0 103.5 $ 78.2 Restricted stock and RSUs (1) 14.5 18.1 40.0 50.0 Profit sharing plan 1.4 1.4 4.7 4.8 Total compensation cost $ 64.1 $ 54.5 $ 148.2 $ 133.0 (1) Total compensation cost associated with restricted stock and RSUs includes the amortization of sign-on, retention and senior executive awards, less forfeitures and clawbacks. Additionally, we recognize compensation cost related to the discount provided to employees in electing to defer compensation under the Deferred Compensation Plan. Remaining unamortized amounts related to certain compensation plans at May 31, 2015 is as follows (in millions): Remaining Unamortized Amounts Weighted Average Vesting Period (in Years) Non-vested share-based awards $ 56.0 1.8 Restricted cash awards 314.0 3 Total $ 370.0 The following are descriptions of the compensation plans. 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. Awards issued and outstanding related to the Incentive Plan relate to shares of Leucadia. 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, and are amortized over the service period if we determine that it is probable that the performance condition will be achieved. Awards granted to senior executives related to the 2014 fiscal year did not meet performance targets, and as a result, compensation expense has been adjusted to reflect the reduced number of shares that will vest. 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. 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, or by allocating among any combination of other investment funds available under the Deferred Compensation Plan. 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 deferred compensation liability are reflected as Compensation and benefits expense in our Consolidated Statements of Earnings. 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. 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. We amortize these awards to compensation expense over the relevant service period.

Income Taxes

Income Taxes	6 Months Ended
	May. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes At May 31, 2015 and November 30, 2014 , we had approximately $112.3 million and $126.7 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 $74.7 million and $84.5 million at May 31, 2015 and November 30, 2014 , 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 May 31, 2015 and November 30, 2014 , we had interest accrued of approximately $31.7 million and $30.6 million , respectively, included in Accrued expenses and other liabilities. No material penalties were accrued for the six months ended May 31, 2015 and the year ended November 30, 2014 . 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 California 2006 New Jersey 2007 New York State 2001 New York City 2003 United Kingdom 2013

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	6 Months Ended
	May. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Guarantees	Commitments, Contingencies and Guarantees Commitments The following table summarizes our commitments associated with our capital market and asset management business activities at May 31, 2015 (in millions): Expected Maturity Date 2015 2016 2017 and 2019 and 2021 and Maximum Equity commitments (1) $ — $ 9.2 $ 0.9 $ — $ 257.7 $ 267.8 Loan commitments (1) 34.3 475.7 387.4 60.1 — 957.5 Mortgage-related and other purchase commitments 909.9 1,330.6 499.1 — — 2,739.6 Underwriting commitments 36.9 — — — — 36.9 Forward starting reverse repos and repos 2,384.4 — — — — 2,384.4 Other unfunded commitments (1) 30.0 — — 6.0 37.5 73.5 $ 3,395.5 $ 1,815.5 $ 887.4 $ 66.1 $ 295.2 $ 6,459.7 (1) Equity, loan 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 May 31, 2015 . 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 2015 2016-2020 2021 and Total Corporate Corporate Non-investment grade. $ — $ 171.9 $ — $ 171.9 $ 9.7 $ 162.2 Unrated 115.0 864.6 — 979.6 184.3 795.3 Total $ 115.0 $ 1,036.5 $ — $ 1,151.5 $ 194.0 $ 957.5 (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 $215.3 million of funded loans included in Financial instruments owned—Loans and Loans to and investments in related parties, and a $21.3 million net liability related to lending commitments recorded in Financial instruments sold, not yet purchased—Derivatives and Financial instruments owned—Derivatives in the Consolidated Statement of Financial Condition at May 31, 2015 . (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 P. Friedman, one of our directors and Chairman of the Executive Committee. At May 31, 2015 , our outstanding commitments relating to Jefferies Capital Partners, LLC and its private equity funds was $30.2 million . See Note 9, Investments , for additional information regarding our investments in Jefferies Finance and Jefferies LoanCore. Additionally, at May 31, 2015 , we had other outstanding equity commitments to invest up to $4.4 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 May 31, 2015 , we had $607.5 million of outstanding loan commitments to clients. Loan commitments outstanding at May 31, 2015 , also include our portion of the outstanding secured revolving credit facility provided to Jefferies Finance, to support loan underwritings by Jefferies Finance. Mortgage-Related and Other Purchase Commitments. We enter into forward contracts to purchase mortgage participation certificates, mortgage-backed securities and consumer loans. 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 FNMA (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac) or the GNMA (Ginnie Mae). We frequently securitize the mortgage participation certificates and mortgage-backed securities. The fair value of mortgage-related and other purchase commitments recorded in the Consolidated Statements of Financial Condition was $135.7 million at May 31, 2015 . 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 During the first quarter of 2014, we reached a non-prosecution agreement with the United States Attorney for the District of Connecticut and a settlement agreement with the SEC, relating to an investigation of purchases and sales of mortgage-backed securities. Those agreements include an aggregate $25.0 million in payments and at May 31, 2015 , the outstanding reserve with respect to remaining payments to be made under the agreements is approximately $0.7 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 May 31, 2015 (in millions): Expected Maturity Date Guarantee Type: 2015 2016 2017 and 2019 2021 and Later Notional/ Derivative contracts—non-credit related $ 28,156.7 $ 3,319.6 $ 614.6 $ 644.4 $ 430.6 $ 33,165.9 Written derivative contracts—credit related 2.0 — — 1,436.3 20.0 1,458.3 Total derivative contracts $ 28,158.7 $ 3,319.6 $ 614.6 $ 2,080.7 $ 450.6 $ 34,624.2 At May 31, 2015 the external credit ratings of the underlyings or referenced assets for our credit related derivatives contracts (in millions): External Credit Rating AAA/ Aaa AA/Aa A BBB/ Baa Below Investment Grade Unrated Notional/ Maximum Payout Credit related derivative contracts: Index credit default swaps $ 1,324.3 $ — $ — $ — $ — $ — $ 1,324.3 Single name credit default swaps $ — $ — $ 22.0 $ 24.0 $ 88.0 $ — $ 134.0 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 May 31, 2015 , the fair value of derivative contracts meeting the definition of a guarantee is approximately $371.6 million . Loan Guarantee . We have provided a guarantee to Jefferies Finance that matures in January 2021, whereby we are required to make certain payments to an SPE sponsored by Jefferies Finance in the event that Jefferies Finance is unable to meet its obligations to the SPE and a guarantee of a credit agreement with an indefinite term for a fund owned by employees. At May 31, 2015 , the maximum amount payable under these guarantees is $29.1 million . Standby Letters of Credit. At May 31, 2015 , we provided guarantees to certain counterparties in the form of standby letters of credit in the amount of $37.3 million , which expire within one year. Standby 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	6 Months Ended
	May. 31, 2015
Brokers and Dealers [Abstract]
Net Capital Requirements	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. Jefferies is also registered as an FCM, and is also subject to Rule 1.17 of the CFTC, which sets forth minimum financial requirements. 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. At May 31, 2015 , Jefferies and Jefferies Execution’s net capital and excess net capital were as follows (in thousands): Net Capital Excess Net Capital Jefferies $ 998,320 $ 913,625 Jefferies Execution 7,800 7,550 FINRA is the designated self-regulatory organization (“DSRO”) for our U.S. broker-dealers and the Chicago Mercantile Exchange is the DSRO for Jefferies as an FCM. 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 authorized and regulated by the Financial Conduct Authority in the U.K. The regulatory capital requirements referred to above may restrict our ability to withdraw capital from our regulated subsidiaries.

Segment Reporting

Segment Reporting	6 Months Ended
	May. 31, 2015
Segment Reporting [Abstract]
Segment Reporting	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): Three Months Ended May 31, Six Months Ended May 31, 2015 2014 2015 2014 Capital Markets: Net revenues $ 789.1 $ 717.8 $ 1,351.5 $ 1,594.7 Expenses $ 692.4 $ 617.1 $ 1,264.7 $ 1,322.8 Asset Management: Net revenues $ 2.5 $ 5.2 $ 31.7 $ 27.3 Expenses $ 14.4 $ 6.7 $ 20.9 $ 17.8 Total: Net revenues $ 791.6 $ 723.0 $ 1,383.2 $ 1,622.0 Expenses $ 706.8 $ 623.8 $ 1,285.6 $ 1,340.6 The following table summarizes our total assets by segment at May 31, 2015 and November 30, 2014 (in millions): May 31, 2015 November 30, 2014 Segment assets: Capital Markets $ 43,465.3 $ 44,002.6 Asset Management 676.5 515.0 Total assets $ 44,141.8 $ 44,517.6 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): Three Months Ended May 31, Six Months Ended May 31, 2015 2014 2015 2014 Americas (1) $ 616,857 $ 538,930 $ 1,053,643 $ 1,231,985 Europe (2) 148,998 159,983 288,204 346,774 Asia 25,699 24,079 41,379 43,261 Net revenues $ 791,554 $ 722,992 $ 1,383,226 $ 1,622,020 (1) Substantially all relates to U.S. results. (2) Substantially all relates to U.K. results.

Related Party Transactions

Related Party Transactions	6 Months Ended
	May. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	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 May 31, 2015 and November 30, 2014 , loans to and/or equity investments in Private Equity Related Funds were in aggregate $36.7 million and $60.7 million , respectively. The following table presents other revenues and investment income (loss) related to net gains and losses on our investment in Private Equity Related Funds (in thousands): Three Months Ended May 31, Six Months Ended May 31, 2015 2014 2015 2014 Other revenues and investment income (loss) $ 947 $ (9,036 ) (24,212 ) (11,459 ) For further information regarding our commitments and funded amounts to Private Equity Related Funds, see Note 17, Commitments, Contingencies and Guarantees . Berkadia Commercial Mortgage, LLC. At May 31, 2015 and November 30, 2014 , we have commitments to purchase $336.5 million and $344.8 million , respectively, in agency commercial mortgage-backed securities from Berkadia Commercial Mortgage, LLC, which is partially owned by Leucadia. HRG Group Inc. As part of our loan secondary trading activities we have unsettled purchases and sales of loans pertaining to portfolio companies within funds managed by HRG of $266.6 million and $232.0 million at May 31, 2015 and November 30, 2014 , respectively. Additionally, we recognized investment banking and advisory revenues of $0.9 million and $1.3 million during the three and six months ended May 31, 2015 , respectively. National Beef Packaging Company, LLC (“National Beef”). We act as an FCM for National Beef, which is partially owned by Leucadia. At May 31, 2015 and November 30, 2014 , we had a customer payable to National Beef of $0.0 million and $4.1 million , respectively. During the three and six months ended May 31, 2015 , we recognized commissions of $0.0 million and $0.2 million , respectively. Officers, Directors and Employees. At May 31, 2015 and November 30, 2014 , we had $24.3 million and $20.1 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. Receivables from and payables to customers include balances arising from officers, directors and employees individual security transactions. These transactions are subject to the same regulations as all customer transactions and are provided on substantially the same terms. At May 31, 2015 and November 30, 2014 , we have provided a guarantee of a credit agreement for a private equity fund owned by our employees. Leucadia . The following is a description of related party transactions with Leucadia, which are settled on a quarterly basis: • Under a service agreement, we charge Leucadia for certain services, which amounted to $6.1 million and $11.2 million , for the three and six months ended May 31, 2015 , respectively, and amounted to $9.2 million and $17.2 million for the three and six months ended May 31, 2014 , respectively. At May 31, 2015 and November 30, 2014 , we had a receivable from Leucadia of $3.0 million and $10.9 million , respectively, which is included within Other assets on the Consolidated Statements of Financial Condition. At May 31, 2015 and November 30, 2014 , we had a payable to Leucadia of $7.3 million and $41.5 million , respectively, related to stock compensation arrangements and senior executive benefits provided by Leucadia, which is included within Other liabilities on the Consolidated Statements of Financial Condition. • We have a tax sharing agreement with Leucadia, for which any amounts outstanding are included in Other assets on the Consolidated Statements of Financial Condition. • At May 31, 2015 and November 30, 2014 , $26.1 million and $25.4 million , respectively, of the total noncontrolling interests in asset management entities that are consolidated by us are attributed to Leucadia. • We provide capital markets and asset management services to Leucadia and its affiliates. The following table presents the revenues earned by type of services provided (in thousands): Three Months Ended May 31, 2015 Six Months Ended May 31, 2015 Investment banking and advisory $ 200 $ 21,200 Asset management 119 303 Commissions 1 37 • On March 18, 2014, we sold our investment in HRG Group Inc., consisting of approximately 18.6 million shares, to Leucadia at the closing price on that date. • 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. For information on transactions with our equity method investees, see Note 9, Investments .

Exit Costs

Exit Costs	6 Months Ended
	May. 31, 2015
Restructuring and Related Activities [Abstract]
Exit Costs	Exit Costs Jefferies Bache. On April 9, 2015, we entered into an agreement with Société Générale S.A. (the “Agreement”) to transfer certain client exchange and over-the-counter transactions associated with our Futures business for the net book value of the over-the-counter transactions, calculated in accordance with certain principles set forth in the agreement, plus the repayment of certain margin loans in respect of certain exchange transactions. The transfer is subject to customary closing conditions for a transaction of this nature. In addition, we initiated a plan to substantially exit the remaining aspects of our futures business. During the three months ended May 31, 2015 , we have transferred about 50% of client accounts to Société Générale S.A. and other brokers. We expect to substantially complete the exit of the Bache business during the third quarter of fiscal 2015. In addition, we expect to terminate our $750.0 million Credit Facility during the third quarter of fiscal 2015. At May 31, 2015, the remaining unamortized deferred origination costs were $2.2 million, which will be fully expensed during the third quarter of fiscal 2015. During the three months ended May 31, 2015, we recorded restructuring and impairment costs as follows (in thousands): Three Months Ended May 31, 2015 Severance costs $ 15,559 Accelerated amortization of restricted stock and restricted cash awards 4,460 Accelerated amortization of capitalized software 6,260 Other expenses 2,291 Total $ 28,570 Of the above costs, $10.8 million are of a non-cash nature. Restructuring costs are wholly attributed to our Capital Markets segment and were recorded in the following categories on the Consolidated Statement of Earnings for the three months ended May 31, 2015 (in thousands): Three Months Ended May 31, 2015 Compensation and benefits $ 20,019 Technology and communications 6,260 Professional services 2,033 Other expenses 258 Total $ 28,570 We expect to incur approximately an additional $48.6 million of restructuring costs through the remainder of fiscal 2015 in connection with our exit activities comprised of (1) severance and related benefits, including additional amortization for restricted stock and restricted cash awards and (2) contract termination costs. The following summarizes our restructuring reserve activity (in thousands): Severance costs Other costs Total restructuring costs Accelerated amortization of restricted stock and restricted cash awards Accelerated amortization of capitalized software Total Balance at February 28, 2015 $ — $ — $ — Expenses 15,559 2,291 17,850 $ 4,460 $ 6,260 $ 28,570 Payments (2,523 ) (1,518 ) (4,041 ) Liability at May 31, 2015 $ 13,036 $ 773 $ 13,809

Summary of Significant Accoun29

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	May. 31, 2015
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, a futures commission merchant (“FCM”), 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 transaction revenues in the Consolidated Statements of Earnings on a trade date basis. Fees received on loans carried at fair value are also recorded within Principal transaction revenues. 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 transaction revenues 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 as an FCM 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 and Fair Value	Financial Instruments and Fair Value 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 transaction revenues 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, 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 independent sources, 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 services use 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 based on the net asset value ("NAV") of the funds provided by the fund managers with gains or losses included in Asset management fees and investment income (loss) 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 9, Investments , and Note 20, Related Party Transactions , for additional information regarding certain of these investments.
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. The carrying values of internally developed software ready for its intended use are depreciated over the remaining useful life.
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, by comparing the implied fair value of the reporting unit's goodwill to the carrying value of the reporting unit's goodwill. 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.
Income Taxes	Income Taxes 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. Pursuant to a tax sharing agreement entered into between us and Leucadia, payments are made between us and Leucadia to settle current tax assets and liabilities. 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 non-vested share-based awards are recognized as an increase to Additional paid-in capital. These amounts, and other windfall tax effects, are included in “Tax benefit (detriment) for issuance of share-based awards” on the Consolidated Statements of Changes in Equity. In the event tax benefits associated with share-based awards are less than the cumulative compensation cost recognized for financial reporting purposes, we look to Leucadia’s consolidated pool of windfall tax benefits in the calculation of our income tax provision. 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 May 31, 2015 , we have reserved approximately $0.7 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 SEC, 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 transaction revenues in the Consolidated Statements of Earnings.
Securitization Activities	Securitization Activities We engage in securitization activities related to corporate loans, consumer 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.
New Accounting Pronouncements	Accounting Standards to be Adopted in Future Periods Debt Issuance Costs. In April 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2015-03, Simplifying the Presentation of Debt Issuance Costs. The accounting guidance requires that debt issuance costs related to a recognized debt liability be reported in the Consolidated Statements of Financial Condition as a direct deduction from the carrying amount of that debt liability. The guidance is effective retrospectively beginning in the first quarter of fiscal 2017 and early adoption is permitted. The adoption of this accounting guidance is not expected to have a material impact on our Consolidated Statements of Financial Condition. Consolidation. In February 2015, the FASB issued ASU No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis. The amendment eliminates the deferral of certain consolidation standards for entities considered to be investment companies and modifies the consolidation analysis performed on certain types of legal entities. The guidance is effective beginning in the first quarter of fiscal 2017 and early adoption is permitted. We are currently evaluating the impact of the new guidance on our consolidated financial statements. 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. This accounting change was effective in the second quarter of fiscal 2015. The guidance also requires new disclosures about certain transfers of financial assets accounted for as sales as well as increased transparency about the types of collateral pledged and remaining maturity of repurchase and securities lending agreements. The disclosure guidance related to certain transactions accounted for as sales was effective prospectively in the second quarter of fiscal 2015. The disclosure guidance related to the types of collateral pledged and remaining maturity of repurchase and securities lending agreements is effective prospectively in the third quarter of fiscal 2015. This guidance did not have a material effect on our consolidated financial statements and we 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 (“ASU No. 2014-09”). The accounting guidance defines how companies report revenues from contracts with customers, and also requires enhanced disclosures. The guidance, as stated in ASU No. 2014-09, is effective beginning in the first quarter of fiscal 2018. In July 2015, the FASB confirmed a deferral of the effective date by one year, with early adoption on the original effective date permitted. We are currently evaluating the impact of the new guidance on our consolidated financial statements. Adopted Accounting Standards Investments in Certain Entities That Calculate Net Asset Value. In May 2015, the FASB issued ASU No. 2015-07, “Fair Value Measurement (Topic 820) - Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent)” ("ASU No. 2015-07"). The guidance removes the requirement to include investments in the fair value hierarchy for which the fair value is measured at net asset value ("NAV") using the practical expedient under “Fair Value Measurements and Disclosures (Topic 820).” The guidance also removes the requirement to make certain disclosures for all investments that are eligible to be measured at fair value using the net asset value practical expedient. Rather, those disclosures are limited to investments for which we have elected to measure the fair value using that practical expedient. The guidance is effective retrospectively beginning in the first quarter of fiscal 2017. Early adoption is permitted and we have early adopted this guidance during the second quarter of fiscal 2015. Since the guidance only impacts our disclosures, adoption did not affect our consolidated financial statements. The adjustments had the impact of reducing Level 3 assets by $72.6 million at February 28, 2015, $97.1 million at November 30, 2014, $94.9 million at May 31, 2014, $95.6 million at February 28, 2014 and $91.6 million at November 30, 2013. For further information on the adoption of ASU No. 2015-07, refer to Note 4, Fair Value Disclosures . 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 was effective beginning in the first quarter of 2015. The adoption of this guidance did not have a significant impact on our consolidated financial statements. 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 was effective for fiscal years and interim periods within those years, beginning after December 15, 2013, and is applied prospectively to all unrecognized tax benefits that exist at the effective date. The adoption of this update, effective December 1, 2014, did not have a material effect on our consolidated financial statements.

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	6 Months Ended
	May. 31, 2015
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, excluding Investments at fair value based on NAV of $42.5 million and $42.2 million at May 31, 2015 and November 30, 2014 , respectively, by level within the fair value hierarchy (in thousands): May 31, 2015 Level 1(1) Level 2(1) Level 3 Counterparty and Cash Collateral Netting (2) Total Assets: Financial instruments owned: Corporate equity securities $ 2,639,204 $ 187,080 $ 20,547 $ — $ 2,846,831 Corporate debt securities — 3,393,526 31,917 — 3,425,443 Collateralized debt obligations — 166,814 89,007 — 255,821 U.S. government and federal agency securities 2,615,590 307,285 — — 2,922,875 Municipal securities — 638,604 — — 638,604 Sovereign obligations 1,256,242 1,241,493 — — 2,497,735 Residential mortgage-backed securities — 2,809,536 88,695 — 2,898,231 Commercial mortgage-backed securities — 908,809 17,862 — 926,671 Other asset-backed securities — 88,731 11,857 — 100,588 Loans and other receivables — 1,599,819 108,756 — 1,708,575 Derivatives 64,371 4,404,136 40,012 (4,106,430 ) 402,089 Investments at fair value — 718 131,343 — 132,061 Physical commodities — 45,191 — — 45,191 Total financial instruments owned, excluding Investments at fair value based on NAV $ 6,575,407 $ 15,791,742 $ 539,996 $ (4,106,430 ) $ 18,800,715 Cash and cash equivalents $ 3,288,758 $ — $ — $ — $ 3,288,758 Cash and securities segregated and on deposit for regulatory purposes (3) $ 2,396,114 $ — $ — $ — $ 2,396,114 Securities received as collateral $ 9,623 $ — $ — $ — $ 9,623 Liabilities: Financial instruments sold, not yet purchased: Corporate equity securities $ 2,134,344 $ 56,838 $ 38 $ — $ 2,191,220 Corporate debt securities — 1,569,430 452 — 1,569,882 U.S. government and federal agency securities 1,955,173 134,889 — — 2,090,062 Sovereign obligations 1,228,416 848,551 — — 2,076,967 Residential mortgage-backed securities — 48,268 — — 48,268 Loans — 957,597 10,732 — 968,329 Derivatives 38,035 4,380,241 38,426 (4,205,980 ) 250,722 Total financial instruments sold, not yet purchased $ 5,355,968 $ 7,995,814 $ 49,648 $ (4,205,980 ) $ 9,195,450 Obligation to return securities received as collateral $ 9,623 $ — $ — $ — $ 9,623 Other secured financings $ — $ — $ 56,060 $ — $ 56,060 Embedded conversion option $ — $ — $ 725 $ — $ 725 (1) There were no material transfers between Level 1 and Level 2 for the six months ended May 31, 2015 . (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 $525.0 million and Commodities Futures Trading Commission (“CFTC”) approved money market funds with a fair value of $190.0 million . November 30, 2014 Level 1 (1) Level 2 (1) Level 3 Counterparty and Cash Collateral Netting (2) Total Assets: Financial instruments owned: Corporate equity securities $ 2,178,837 $ 226,441 $ 20,964 $ — $ 2,426,242 Corporate debt securities — 3,342,276 22,766 (4) — 3,365,042 Collateralized debt obligations — 306,218 124,650 (4) — 430,868 U.S. government and federal agency securities 2,694,268 81,273 — — 2,775,541 Municipal securities — 590,849 — — 590,849 Sovereign obligations 1,968,747 790,764 — — 2,759,511 Residential mortgage-backed securities — 2,879,954 82,557 — 2,962,511 Commercial mortgage-backed securities — 966,651 26,655 — 993,306 Other asset-backed securities — 137,387 2,294 — 139,681 Loans and other receivables — 1,458,760 97,258 — 1,556,018 Derivatives 65,145 5,046,278 54,190 (4,759,345 ) 406,268 Investments at fair value — 73,148 53,224 — 126,372 Physical commodities — 62,234 — — 62,234 Total financial instruments owned, excluding Investments at fair value based on NAV $ 6,906,997 $ 15,962,233 $ 484,558 $ (4,759,345 ) $ 18,594,443 Cash and cash equivalents $ 4,079,968 $ — $ — $ — $ 4,079,968 Cash and securities segregated and on deposit for regulatory purposes (3) $ 3,444,674 $ — $ — $ — $ 3,444,674 Securities received as collateral $ 5,418 $ — $ — $ — $ 5,418 Liabilities: Financial instruments sold, not yet purchased: Corporate equity securities $ 1,911,145 $ 74,681 $ 38 $ — $ 1,985,864 Corporate debt securities — 1,611,994 223 — 1,612,217 Collateralized debt obligations — 4,557 — — 4,557 U.S. government and federal agency securities 2,253,055 — — — 2,253,055 Sovereign obligations 1,217,075 574,010 — — 1,791,085 Loans — 856,525 14,450 — 870,975 Derivatives 52,778 5,117,803 49,552 (4,856,618 ) 363,515 Total financial instruments sold, not yet purchased $ 5,434,053 $ 8,239,570 $ 64,263 $ (4,856,618 ) $ 8,881,268 Obligation to return securities received as collateral $ 5,418 $ — $ — $ — $ 5,418 Other secured financings $ — $ — $ 30,825 $ — $ 30,825 Embedded conversion option $ — $ — $ 693 $ — $ 693 (1) At December 1, 2013, equity options presented within Financial instruments owned and Financial instruments sold, not yet purchased of $6.1 million and $6.6 million, respectively, were transferred from Level 1 to Level 2 as adjustments were incorporated into the valuation approach for such contracts to estimate the point within the bid-ask range that meets the best estimate of fair value. (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 $453.7 million and CFTC approved money market funds with a fair value of $545.0 million . (4) Level 3 Collateralized debt obligations increased by $33.2 million with a corresponding decrease in Level 3 Corporate debt securities from those previously reported to correct for the classification of certain positions. The total amount of Level 3 assets remained unchanged.
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 May 31, 2015 and November 30, 2014 (in thousands): May 31, 2015 Fair Value (1) Unfunded Commitments Redemption Frequency (if currently eligible) Equity Long/Short Hedge Funds (2) $ 53,360 $ — Monthly, Quarterly Fixed Income and High Yield Hedge Funds (3) 2,679 — — Fund of Funds (4) 339 94 — Equity Funds (5) 41,311 25,670 — Convertible Bond Funds (6) 3,460 — At Will Total (7) $ 101,149 $ 25,764 November 30, 2014 Fair Value (1) Unfunded Commitments Redemption Frequency (if currently eligible) Equity Long/Short Hedge Funds (2) $ 44,983 $ — Monthly, Quarterly Fixed Income and High Yield Hedge Funds (3)(8) 2,704 — — Fund of Funds (4) 323 94 — Equity Funds (5) 65,216 26,023 — Convertible Bond Funds (6) 3,355 — At Will Total (7) $ 116,581 $ 26,117 (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 primarily equity securities in domestic and international markets in both the public and private sectors. At May 31, 2015 and November 30, 2014 , investments representing approximately 100% and 99% , respectively, of the fair value of investments in this category are redeemable with 30 - 90 days prior written notice. (3) Includes investments in funds that invest in loans secured by a first trust deed on property, 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. At May 31, 2015 and November 30, 2014 , the underlying assets of 7% and 8% , respectively, of these 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 May 31, 2015 and November 30, 2014 , approximately 96% and 95% , 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 May 31, 2015 and November 30, 2014 , 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. (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 remaining investments are in liquidation and we are unable to estimate when the underlying assets will be fully liquidated. (7) Investments at fair value within Financial instruments owned in the Consolidated Statements of Financial Condition at May 31, 2015 and November 30, 2014 include $131.2 million and $126.3 million, respectively, of direct investments which do not have the characteristics of investment companies and therefore are not included within this table. (8) Fixed income and high yield hedge funds was revised by $2.5 million from that previously reported due to the inclusion of a fixed income fund, which has the characteristics of an investment company that is included in Investments at fair value within Financial instruments owned in the Consolidated Statement of Financial Condition. The total amount of Investments at fair value remained unchanged.
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 six months ended May 31, 2015 (in thousands): Six Months Ended May 31, 2015 Balance at November 30, 2014 Total gains/ losses (realized and unrealized) (1) Purchases Sales Settlements Issuances Net transfers into/ (out of) Level 3 Balance at May 31, 2015 Change in unrealized gains/ (losses) relating to instruments still held at May 31, 2015 (1) Assets: Financial instruments owned: Corporate equity securities $ 20,964 $ 7,066 $ 1,469 $ (262 ) $ — $ — $ (8,690 ) $ 20,547 $ 7,077 Corporate debt securities 22,766 (796 ) 3,095 (3,445 ) — — 10,297 31,917 (929 ) Collateralized debt obligations 124,650 (17,229 ) 66,246 (59,532 ) (147 ) — (24,981 ) 89,007 (8,989 ) Residential mortgage-backed securities 82,557 (3,735 ) 24,083 (18,899 ) (477 ) — 5,166 88,695 (822 ) Commercial mortgage-backed securities 26,655 (1,124 ) 4,685 (12,128 ) (6,971 ) — 6,745 17,862 (496 ) Other asset-backed securities 2,294 (258 ) 8,385 (79 ) (207 ) — 1,722 11,857 (97 ) Loans and other receivables 97,258 (5,795 ) 71,865 (29,184 ) (33,895 ) — 8,507 108,756 (3,166 ) Investments, at fair value 53,224 4,615 5,270 (427 ) (541 ) — 69,202 131,343 4,882 Liabilities: Financial instruments sold, not yet purchased: Corporate equity securities $ 38 $ — $ — $ — $ — $ — $ — $ 38 $ — Corporate debt securities 223 225 (6,677 ) 6,804 — — (123 ) 452 (339 ) Net derivatives (2) (4,638 ) 1,925 (8,848 ) 120 8,395 1,460 — (1,586 ) (3,586 ) Loans 14,450 (277 ) (759 ) 350 — — (3,032 ) 10,732 277 Other secured financings 30,825 — — — (11,760 ) 36,995 — 56,060 — Embedded conversion option 693 32 — — — — — 725 (32 ) (1) Realized and unrealized gains/losses are reported in Principal transaction revenues 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 May 31, 2015 (in thousands): Three Months Ended May 31, 2015 Balance at February 28, 2015 Total gains/ losses (realized and unrealized) (1) Purchases Sales Settlements Issuances Net transfers into/ (out of) Level 3 Balance at May 31, 2015 Change in unrealized gains/ (losses) relating to instruments still held at May 31, 2015 (1) Assets: Financial instruments owned: Corporate equity securities $ 18,210 $ 8,030 $ — $ (73 ) $ — $ — $ (5,620 ) $ 20,547 $ 8,073 Corporate debt securities 24,795 (532 ) 2,183 (2,368 ) — — 7,839 31,917 (922 ) Collateralized debt obligations 96,837 (5,120 ) 29,021 (25,430 ) — — (6,301 ) 89,007 (2,328 ) Sovereign obligations 333 (12 ) 320 (641 ) — — — — — Residential mortgage-backed securities 79,953 (1,820 ) 8,733 (4,915 ) (323 ) — 7,067 88,695 315 Commercial mortgage-backed securities 24,629 (789 ) 1,256 (9,237 ) (173 ) — 2,176 17,862 (759 ) Other asset-backed securities 7,146 (19 ) 8,322 (80 ) (270 ) — (3,242 ) 11,857 41 Loans and other receivables 111,410 (748 ) 40,602 (26,335 ) (16,314 ) — 141 108,756 (669 ) Investments at fair value 128,232 3,380 73 (78 ) (264 ) — — 131,343 3,482 Liabilities: Financial instruments sold, not yet purchased: Corporate equity securities $ 38 $ — $ — $ — $ — $ — $ — $ 38 $ — Corporate debt securities — 339 — 113 — — — 452 (339 ) Net derivatives (2) 3,314 (4,912 ) (11,963 ) — 12,078 389 (492 ) (1,586 ) 4,912 Loans 9,327 (332 ) (1,170 ) 350 2,557 — — 10,732 332 Other secured financings 65,602 — — — (9,542 ) — — 56,060 — Embedded conversion option 825 (100 ) — — — — — 725 100 (1) Realized and unrealized gains/losses are reported in Principal transaction revenues 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 six months ended May 31, 2014 (in thousands): Six Months Ended May 31, 2014 Balance at November 30, 2013 Total gains/ losses (realized and unrealized) (1) Purchases Sales Settlements Issuances Net transfers into/ (out of) Level 3 Balance at May 31, 2014 Change in unrealized gains/ (losses) relating to instruments still held at May 31, 2014 (1) Assets: Financial instruments owned: Corporate equity securities $ 9,884 $ (1,583 ) $ 608 $ (370 ) $ — $ — $ 7,863 $ 16,402 $ (494 ) Corporate debt securities 25,666 5,116 3,835 (3,224 ) — — 255 31,648 7,420 Collateralized debt obligations 37,216 14,169 36,200 (55,963 ) — — 10,691 42,313 5,656 Residential mortgage-backed securities 105,492 (4,114 ) 21,893 (37,356 ) (529 ) — (13,424 ) 71,962 (1,324 ) Commercial mortgage-backed securities 17,568 (2,191 ) 32,449 (29,864 ) (1,710 ) — 7,994 24,246 (3,236 ) Other asset-backed securities 12,611 (537 ) 17,361 (5,496 ) (438 ) — 21,943 45,444 (569 ) Loans and other receivables 145,890 3,946 92,579 (88,674 ) (26,685 ) — 11,587 138,643 3,382 Investments, at fair value 66,931 24,601 27,660 (32,648 ) — — (7,228 ) 79,316 21,954 Liabilities: Financial instruments sold, not yet purchased: Corporate equity securities $ 38 $ — $ — $ — $ — $ — $ — $ 38 $ — Corporate debt securities — (203 ) (28,319 ) 31,431 — — (129 ) 2,780 203 Net derivatives (2) 6,905 11,591 (179 ) (21 ) 318 — (3,332 ) 15,282 (11,591 ) Loans 22,462 754 (22,491 ) 27,908 139 — 2,762 31,534 (57 ) Other secured financings 8,711 — — — (9,114 ) 20,691 — 20,288 — Embedded conversion option 9,574 (5,679 ) — — — — — 3,895 5,679 (1) Realized and unrealized gains/losses are reported in Principal transaction revenues 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 May 31, 2014 (in thousands): Three Months Ended May 31, 2014 (1) Balance at February 28, 2014 Total gains/ losses (realized and unrealized) (2) Purchases Sales Settlements Net transfers into/ (out of) Level 3 Balance at May 31, 2014 Change in unrealized gains/ (losses) relating to instruments still held at May 31, 2014 (2) Assets: Financial instruments owned: Corporate equity securities $ 12,341 $ (178 ) $ 90 $ (84 ) $ — $ 4,233 $ 16,402 $ (178 ) Corporate debt securities 29,315 5,659 1,937 (5,831 ) — 568 31,648 7,999 Collateralized debt obligations 66,028 4,706 19,146 (49,636 ) (331 ) 2,400 42,313 238 Residential mortgage-backed securities 116,992 (791 ) 10,955 (24,618 ) (459 ) (30,117 ) 71,962 (422 ) Commercial mortgage-backed securities 17,486 (903 ) 18,026 (21,038 ) (1,189 ) 11,864 24,246 (1,933 ) Other asset-backed securities 2,375 (314 ) 15,686 — (438 ) 28,135 45,444 (314 ) Loans and other receivables 128,832 11,933 42,278 (48,064 ) (21,482 ) 25,146 138,643 11,922 Investments at fair value 82,205 2,349 5,160 (3,946 ) — (6,452 ) 79,316 (299 ) Liabilities: Financial instruments sold, not yet purchased: Corporate equity securities $ 1,015 $ (977 ) $ — $ — $ — $ — $ 38 $ 558 Corporate debt — (84 ) (4,082 ) 3,012 — 3,934 2,780 84 Net derivatives (3) 5,773 9,485 (2,150 ) 2,149 25 — 15,282 (9,485 ) Loans 10,260 62 (9,629 ) 18,995 139 11,707 31,534 (57 ) Other secured financings 30,394 — (992 ) — (9,114 ) — 20,288 — Embedded conversion option 7,607 (3,712 ) — — — — 3,895 3,712 (1) There were no issuances during the three months ended May 31, 2014 . (2) Realized and unrealized gains/losses are reported in Principal transaction revenues 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 periods 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. May 31, 2015 Financial Instruments Owned Fair Value (in thousands) Valuation Technique Significant Unobservable Input(s) Input / Range Weighted Average Corporate equity securities $ 18,647 Non-exchange traded securities Market approach EBITDA (a) multiple 4.8 to 5.9 5.4 Discounted cash flows Underlying stock price 5.3 — Scenario analysis Estimated recovery percentage 79% — Corporate debt securities $ 31,917 Convertible bond model Discount rate/yield 35% — Discounted cash flows Discount rate/yield 22% — Collateralized debt obligations $ 46,565 Discounted cash flows Constant prepayment rate 0% to 20% 17 % Constant default rate 0% to 2% 2 % Loss severity 25% to 100% 39 % Yield 10% to 22% 11 % Residential mortgage-backed securities $ 88,695 Discounted cash flows Constant prepayment rate 0% to 50% 13 % Constant default rate 1% to 100% 17 % Loss severity 30% to 90% 59 % Yield 0% to 12% 5 % Commercial mortgage-backed securities $ 17,862 Discounted cash flows Yield 12% to 21% 16 % Cumulative loss rate 2% to 49% 10 % Other asset-backed securities $ 11,857 Discounted cash flows Constant prepayment rate 3% to 6% 3 % Constant default rate 3% to 6% 5 % Loss severity 60% to 70% 69 % Yield 5% to 7% 5 % Loans and other receivables $ 99,094 Comparable pricing Comparable loan price $99 to $100 $ 99.9 Market approach Yield 3% to 10% 8 % EBITDA (a) multiple 7.3 — Scenario analysis Estimated recovery percentage 10% to 75% 36 % Discounted cash flows Constant prepayment rate 20% — Constant default rate 2% — Loss severity 30% — Yield 11% — Derivatives 40,012 Foreign exchange options Option Model Volatility 11% to 23% 13 % Commodity forwards Discounted cash flows Discount rate 24% — Unfunded commitment Comparable pricing Comparable loan price $83 to $100 $ 99.9 Market approach Yield 8% — Investments at fair value Private equity securities $ 6,627 Market approach Transaction Level $56 — Liabilities Fair Value (in thousands) Valuation Technique Significant Unobservable Input(s) Input / Range Weighted Average Financial Instruments Sold, Not Yet Purchased: Derivatives $ 38,426 Foreign exchange options Option model Volatility 11% to 23% 13 % Unfunded commitment Comparable pricing Comparable loan price $83 to $100 $ 88.7 Market approach Yield 5% to 8% 8 % Discounted cash flows Constant prepayment rate 20% — Constant default rate 2% — Loss severity 30% — Yield 11% — Loans and other receivables $ 10,732 Comparable pricing Comparable loan price $100 — Other secured financings $ 56,060 Comparable pricing Comparable loan price $71 to $100 $ 97.0 Embedded conversion option $ 725 Option valuation model Historical volatility 20% — (a) Earnings before interest, taxes, depreciation and amortization (“EBITDA”). November 30, 2014 Financial Instruments Owned Fair Value (in thousands) Valuation Technique Significant Unobservable Input(s) Input / Range Weighted Average Corporate equity securities $ 19,814 Non-exchange traded securities Market approach EBITDA multiple 3.4 to 4.7 3.6 Scenario analysis Estimated recovery percentage 24% — Corporate debt securities $ 22,766 Convertible bond model Discount rate/yield 32% — Collateralized debt obligations $ 41,784 Discounted cash flows Constant prepayment rate 0% to 20% 13 % Constant default rate 0% to 2% 2 % Loss severity 0% to 70% 39 % Yield 2% to 51% 16 % Residential mortgage-backed securities $ 82,557 Discounted cash flows Constant prepayment rate 1% to 50% 13 % Constant default rate 1% to 100% 14 % Loss severity 20% to 80% 50 % Yield 3% to 13% 7 % Commercial mortgage-backed securities $ 26,655 Discounted cash flows Yield 8% to 12% 11 % Cumulative loss rate 4% to 72% 15 % Scenario analysis Estimated recovery percentage 90% — Other asset-backed securities $ 2,294 Discounted cash flows Constant prepayment rate 8% — Constant default rate 3% — Loss severity 70% — Yield 7% — Loans and other receivables $ 88,154 Comparable pricing Comparable loan price $100 to $101 $ 100.3 Market approach Yield 3% to 5% 4 % EBITDA multiple 3.4 to 8.2 7.6 Scenario analysis Estimated recovery percentage 10% to 41% 36 % Derivatives $ 54,190 Foreign exchange options Option Model Volatility 13% to 23% 17 % Commodity forwards Discounted cash flows Discount rate 17% — Loan commitments Comparable pricing Comparable loan price $100 — Investments at fair value $ 8,500 Private equity securities Market approach Transaction level $50 — Liabilities Fair Value (in thousands) Valuation Technique Significant Unobservable Input(s) Input / Range Weighted Average Financial Instruments Sold, Not Yet Purchased: Derivatives $ 49,552 FX options Option model Volatility 13% to 23% 17 % Unfunded commitment Comparable pricing Comparable loan price $89 to $100 $ 92.0 Credit spread 45bps — Market approach Yield 5% — Loans and other receivables $ 14,450 Comparable pricing Comparable loan price $100 — Other secured financings $ 30,825 Comparable pricing Comparable loan price $81 to $100 $ 98.7 Embedded conversion option $ 693 Option valuation model Historical volatility 19% —
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): Three Months Ended May 31, Six Months Ended May 31, 2015 2014 2015 2014 Financial Instruments Owned: Loans and other receivables $ (5,294 ) $ 2,038 $ (2,377 ) $ 1,430 Financial Instruments Sold: Loans $ 110 $ (1,555 ) $ 238 $ (2,591 ) Loan commitments 5,544 (9,024 ) (1,622 ) (11,090 ) 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): May 31, 2015 November 30, 2014 Financial Instruments Owned: Loans and other receivables (1) $ 466,404 $ 403,119 Loans and other receivables greater than 90 days past due (1) 29,109 5,594 Loans and other receivables on nonaccrual status (1) (2) (16,684 ) (22,360 ) (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) Amounts include all loans and other receivables greater than 90 days past due.

Derivative Financial Instrume31

Derivative Financial Instruments (Tables)	6 Months Ended
	May. 31, 2015
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 May 31, 2015 and November 30, 2014 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 6, 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 U.S. 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). May 31, 2015 (1) Assets Liabilities Fair Value Number of Fair Value Number of Interest rate contracts Exchange-traded $ 2,892 61,924 $ 1,581 103,802 Cleared OTC 1,898,174 2,681 1,895,708 2,963 Bilateral OTC 736,995 1,689 702,048 1,455 Foreign exchange contracts Exchange-traded — 624 — 590 Bilateral OTC 645,414 10,656 655,504 9,780 Equity contracts Exchange-traded 917,466 2,909,384 857,264 2,819,750 Bilateral OTC 53,815 1,056 110,662 1,208 Commodity contracts Exchange-traded 57,831 709,590 34,881 712,279 Bilateral OTC 134,645 2,807 117,082 2,571 Credit contracts Cleared OTC 47,813 45 51,038 39 Bilateral OTC 13,474 68 30,934 47 Total gross derivative assets/ liabilities: Exchange-traded 978,189 893,726 Cleared OTC 1,945,987 1,946,746 Bilateral OTC 1,584,343 1,616,230 Amounts offset in the Consolidated Exchange-traded (887,594 ) (887,594 ) Cleared OTC (1,912,437 ) (1,912,437 ) Bilateral OTC (1,306,399 ) (1,405,949 ) Net amounts per Consolidated $ 402,089 $ 250,722 (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, 2014 (1) Assets Liabilities Fair Value Number of Contracts Fair Value Number of Contracts Interest rate contracts Exchange-traded $ 2,450 67,437 $ 1,400 87,008 Cleared OTC 1,425,375 2,160 1,481,329 2,124 Bilateral OTC 871,982 1,908 809,962 729 Foreign exchange contracts Exchange-traded — 1,562 — 1,821 Bilateral OTC 1,514,881 11,299 1,519,349 10,931 Equity contracts Exchange-traded 1,011,101 2,269,044 987,531 2,049,513 Bilateral OTC 39,889 2,463 70,484 1,956 Commodity contracts Exchange-traded 62,091 1,027,542 51,145 1,015,894 Bilateral OTC 214,635 4,026 252,061 4,524 Credit contracts Cleared OTC 17,831 27 23,264 22 Bilateral OTC 5,378 18 23,608 27 Total gross derivative assets/liabilities: Exchange-traded 1,075,642 1,040,076 Cleared OTC 1,443,206 1,504,593 Bilateral OTC 2,646,765 2,675,464 Amounts offset in the Consolidated Statements of Financial Condition (2): Exchange-traded (1,038,992 ) (1,038,992 ) Cleared OTC (1,416,613 ) (1,416,613 ) Bilateral OTC (2,303,740 ) (2,401,013 ) Net amounts per Consolidated Statements of Financial Condition (3) $ 406,268 $ 363,515 (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 six months ended May 31, 2015 and 2014 (in thousands): Three Months Ended Six Months Ended Gains (Losses) May 31, 2015 May 31, 2014 May 31, 2015 May 31, 2014 Interest rate contracts $ 18,064 $ (61,367 ) $ (24,728 ) $ (66,485 ) Foreign exchange contracts 8,352 (3,718 ) 23,524 2,348 Equity contracts (111,682 ) (73,925 ) (40,641 ) (170,161 ) Commodity contracts 5,746 21,793 20,237 37,980 Credit contracts 9,805 (11,745 ) 3,763 (15,623 ) Total $ (69,715 ) $ (128,962 ) $ (17,845 ) $ (211,941 )
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 May 31, 2015 (in thousands): OTC Derivative Assets (1) (2) (3) 0 – 12 Months 1 – 5 Years Greater Than 5 Years Cross-Maturity Netting (4) Total Commodity swaps, options and forwards $ 50,402 $ 1,592 $ 21,717 $ (3,562 ) $ 70,149 Equity swaps and options 12,791 13,371 5,349 — 31,511 Credit default swaps — 2,045 7,067 (1,519 ) 7,593 Total return swaps 10,160 2,635 — (2,564 ) 10,231 Foreign currency forwards, swaps and options 143,252 30,561 — (13,178 ) 160,635 Interest rate swaps, options and forwards 47,927 155,590 95,763 (64,051 ) 235,229 Total $ 264,532 $ 205,794 $ 129,896 $ (84,874 ) 515,348 Cross product counterparty netting (16,998 ) Total OTC derivative assets included in Financial instruments owned $ 498,350 (1) At May 31, 2015 , we held exchange traded derivative assets and other credit agreements with a fair value of $94.1 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 May 31, 2015 , cash collateral received was $190.4 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 5 Years Cross-Maturity Netting (4) Total Commodity swaps, options and forwards $ 51,982 $ 693 $ 3,474 $ (3,562 ) $ 52,587 Equity swaps and options 28,147 37,353 15,332 — 80,832 Credit default swaps 1,064 1,334 5,636 (1,519 ) 6,515 Total return swaps 21,311 9 1,489 (2,564 ) 20,245 Foreign currency forwards, swaps and options 121,295 62,607 — (13,178 ) 170,724 Fixed income forwards 278 — — — 278 Interest rate swaps, options and forwards 45,926 96,089 120,986 (64,051 ) 198,950 Total $ 270,003 $ 198,085 $ 146,917 $ (84,874 ) 530,131 Cross product counterparty netting (16,998 ) Total OTC derivative liabilities included in Financial instruments sold, not yet purchased $ 513,133 (1) At May 31, 2015 , we held exchange traded derivative liabilities and other credit agreements with a fair value of $27.7 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 May 31, 2015 , cash collateral pledged was $290.1 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 May 31, 2015 , 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 $ 178,941 BBB- to BBB+ 129,161 BB+ or lower 84,507 Unrated 105,741 Total $ 498,350 (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)	6 Months Ended
	May. 31, 2015
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 U.S. 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 5, Derivative Financial Instruments , for information related to offsetting of derivatives. May 31, 2015 Gross Amounts Netting in Consolidated Statement of Financial Condition Net Amounts in Consolidated Statement of Financial Condition Additional Amounts Available for Setoff (1) Available Collateral (2) Net Amount (3) Assets Securities borrowing arrangements $ 7,839,005 $ — $ 7,839,005 $ (545,998 ) $ (921,694 ) $ 6,371,313 Reverse repurchase agreements 13,695,209 (9,910,705 ) 3,784,504 (261,671 ) (3,492,047 ) 30,786 Liabilities Securities lending arrangements $ 3,694,620 $ — $ 3,694,620 $ (545,998 ) $ (3,104,520 ) $ 44,102 Repurchase agreements 21,039,148 (9,910,705 ) 11,128,443 (261,671 ) (9,099,025 ) 1,767,747 November 30, 2014 Gross Amounts Netting in Consolidated Statement of Financial Condition Net Amounts in Consolidated Statement of Financial Condition Additional Amounts Available for Setoff (1) Available Collateral (2) Net Amount (4) Assets Securities borrowing arrangements $ 6,853,103 $ — $ 6,853,103 $ (680,222 ) $ (1,274,196 ) $ 4,898,685 Reverse repurchase agreements 14,059,133 (10,132,275 ) 3,926,858 (634,568 ) (3,248,817 ) 43,473 Liabilities Securities lending arrangements $ 2,598,487 $ — $ 2,598,487 $ (680,222 ) $ (1,883,140 ) $ 35,125 Repurchase agreements 20,804,432 (10,132,275 ) 10,672,157 (634,568 ) (8,810,770 ) 1,226,819 (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 $6,327.5 million of securities borrowing arrangements, for which we have received securities collateral of $6,143.2 million , and $1,750.5 million of repurchase agreements, for which we have pledged securities collateral of $1,802.5 million , which are subject to master netting agreements but we have not yet determined the agreements to be legally enforceable. (4) Amounts include $4,847.4 million of securities borrowing arrangements, for which we have received securities collateral of $4,694.0 million , and $1,201.9 million of repurchase agreements, for which we have pledged securities collateral of $1,238.4 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)	6 Months Ended
	May. 31, 2015
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): Three Months Ended May 31, Six Months Ended May 31, 2015 2014 2015 2014 Transferred assets $ 1,490.6 $ 1,599.7 $ 3,053.5 $ 3,226.6 Proceeds on new securitizations 1,527.1 1,600.1 3,091.6 3,228.2 Cash flows received on retained interests 12.2 20.4 19.0 28.9
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): May 31, 2015 Securitization Type Total Assets Retained Interests U.S. government agency residential mortgage-backed securities $ 10,986.6 $ 139.5 U.S. government agency commercial mortgage-backed securities 3,022.9 85.8 Collateralized loan obligations 4,677.1 61.6 November 30, 2014 Securitization Type Total Assets Retained Interests U.S. government agency residential mortgage-backed securities $ 19,196.9 $ 226.9 U.S. government agency commercial mortgage-backed securities 5,848.5 204.7 Collateralized loan obligations 4,511.8 108.4

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	6 Months Ended
	May. 31, 2015
Variable Interest Entity [Line Items]
Assets and Liabilities of Consolidated VIEs Prior to Consolidation	The following table presents information about our consolidated VIEs at May 31, 2015 and November 30, 2014 (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. May 31, 2015 November 30, 2014 Securitization Other Securitization Other Cash $ — $ 0.2 $ — $ 0.2 Financial instruments owned 54.7 0.3 62.7 0.3 Securities purchased under agreement to resell (1) 654.1 — 575.2 — Fees, interest and other receivables 0.3 — 0.4 — $ 709.1 $ 0.5 $ 638.3 $ 0.5 Other secured financings (2) $ 708.2 $ — $ 637.7 $ — Other liabilities 0.9 0.2 0.6 0.2 $ 709.1 $ 0.2 $ 638.3 $ 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 $2.6 million and $39.7 million of the secured financing represents an amount held by us in inventory and is eliminated in consolidation at May 31, 2015 and November 30, 2014 , respectively.
Variable Interest Entity Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Variable Interests in Non-Consolidated Variable Interest Entities	The following tables present information about our variable interests in nonconsolidated VIEs (in millions): May 31, 2015 Carrying Amount Maximum Assets Liabilities Exposure to loss VIE Assets Collateralized loan obligations $ 84.6 $ — $ 373.9 $ 5,659.6 Consumer loan vehicles 171.0 — 1,116.2 609.2 Asset management vehicle (1) 6.9 — 6.9 49.0 Private equity vehicles (2) 24.3 — 48.9 72.0 Total $ 286.8 $ — $ 1,545.9 $ 6,389.8 November 30, 2014 Carrying Amount Maximum Assets Liabilities Exposure to loss VIE Assets Collateralized loan obligations $ 134.0 $ — $ 926.9 $ 7,737.1 Consumer loan vehicles 170.6 — 797.8 485.2 Asset management vehicle (1) 11.3 — 11.3 432.3 Private equity vehicles (2) 44.3 — 59.2 92.8 Total $ 360.2 $ — $ 1,795.2 $ 8,747.4 (1) Assets consist of equity interests, which are included within Investments in managed funds, and accrued management and performance fees, which are included within Receivables: Fees, interest and other. (2) Assets consist of equity interests, which are included within Investments in managed funds.

Investments (Tables)

Investments (Tables)	6 Months Ended
	May. 31, 2015
Jefferies Finance, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Summary of Selected Financial Information	The following is a summary of selected financial information for Jefferies Finance (in millions): May 31, 2015 November 30, 2014 Total assets $ 6,853.1 $ 5,954.0 Total liabilities 5,879.5 4,961.7 Total equity 973.6 992.3 Our total equity balance 486.8 496.0
Jefferies LoanCore, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Summary of Selected Financial Information	The following is a summary of selected financial information for Jefferies LoanCore (in millions): May 31, 2015 November 30, 2014 Total assets $ 1,887.2 $ 1,500.9 Total liabilities 1,386.6 962.7 Total equity 500.6 538.2 Our total equity balance 242.8 261.0
JCP Funds [Member]
Schedule of Equity Method Investments [Line Items]
Summary of Selected Financial Information	The following is a summary of selected financial information for 100% of JCP Fund V, in which we own effectively 35.2% of the combined equity interests (in thousands): March 31, 2015 (1) December 31, 2014 (1) Total assets $ 74,759 $ 73,261 Total liabilities 86 66 Total partners' capital 74,673 73,195 Three months ended March 31, 2015 (1) Three months ended Three months ended March 31, 2014 (1) Three months ended Net increase (decrease) in net assets resulting from operations $ 1,478 $ (65,700 ) $ (18,779 ) $ (2,947 ) (1) Financial information for JCP Fund V within our financial position and results of operations at May 31, 2015 and November 30, 2014 and for the three and six months ended May 31, 2015 and 2014 is included based on the presented periods.

Goodwill and Other Intangible36

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	May. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill Resulting from Leucadia Transaction Attributable to Reportable Segments and Summary of Changes to Goodwill	Goodwill attributed to our reportable segments are as follows (in thousands): May 31, 2015 November 30, 2014 Capital Markets $ 1,657,193 $ 1,659,636 Asset Management 3,000 3,000 Total goodwill $ 1,660,193 $ 1,662,636 The following table is a summary of the changes to goodwill for the six months ended May 31, 2015 (in thousands): Balance at November 30, 2014 $ 1,662,636 Add: Translation adjustments (2,443 ) Balance at May 31, 2015 $ 1,660,193
Summary of Intangible Assets	The following tables present the gross carrying amount, accumulated amortization, net carrying amount and weighted average amortization period of identifiable intangible assets at May 31, 2015 and November 30, 2014 (in thousands): May 31, 2015 Weighted average remaining lives (years) Gross cost Accumulated amortization Net carrying amount Customer relationships $ 127,944 $ (30,614 ) $ 97,330 13.3 Trade name 131,587 (8,459 ) 123,128 32.8 Exchange and clearing organization membership interests and registrations 14,448 — 14,448 N/A $ 273,979 $ (39,073 ) $ 234,906 November 30, 2014 Weighted Gross cost Accumulated Net carrying Customer relationships $ 128,323 $ (26,402 ) $ 101,921 13.7 Trade name 132,009 (6,677 ) 125,332 33.3 Exchange and clearing organization membership interests and registrations 14,528 — 14,528 N/A $ 274,860 $ (33,079 ) $ 241,781
Future Amortization Expense Related to Intangible Assets	The estimated future amortization expense for the five succeeding fiscal years is as follows (in thousands): Remainder of fiscal 2015 $ 6,099 Year ended November 30, 2016 12,198 Year ended November 30, 2017 12,198 Year ended November 30, 2018 12,198 Year ended November 30, 2019 12,198

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	May. 31, 2015
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 May 31, 2015 and November 30, 2014 (in thousands): May 31, November 30, 2014 Unsecured Long-Term Debt 3.875% Senior Notes, due November 9, 2015 (effective interest rate of 2.17%) $ 503,746 $ 507,944 5.5% Senior Notes, due March 15, 2016 (effective interest rate of 2.52%) 358,159 363,229 5.125% Senior Notes, due April 13, 2018 (effective interest rate of 3.46%) 836,381 842,359 8.5% Senior Notes, due July 15, 2019 (effective interest rate of 4.00%) 819,594 832,797 2.375% Euro Medium Term Notes, due May 20, 2020 (effective rate of 2.42%) 548,005 620,725 6.875% Senior Notes, due April 15, 2021 (effective interest rate of 4.40%) 846,007 853,091 2.25% Euro Medium Term Notes, due July 13, 2022 (effective rate of 4.08%) 3,895 4,379 5.125% Senior Notes, due January 20, 2023 (effective interest rate of 4.55%) 622,114 623,311 6.45% Senior Debentures, due June 8, 2027 (effective interest rate of 5.46%) 380,626 381,515 3.875% Convertible Senior Debentures, due November 1, 2029 (effective interest rate of 3.50%) (1) 348,706 349,261 6.25% Senior Debentures, due January 15, 2036 (effective interest rate of 6.03%) 512,891 513,046 6.50% Senior Notes, due January 20, 2043 (effective interest rate of 6.09%) 421,810 421,960 $ 6,201,934 $ 6,313,617 Secured Long-Term Debt Credit facility 200,000 170,000 $ 6,401,934 $ 6,483,617 (1) The value of the 3.875% Convertible Senior debentures at May 31, 2015 and November 30, 2014 includes the fair value of the conversion feature of $0.7 million and $0.7 million , respectively. The change in fair value of the conversion feature, which is included within Principal transaction revenues in the Consolidated Statements of Earnings, was not material for the three and six months ended May 31, 2015 , and amounted to a gain of $3.7 million and $5.7 million for the three and six months ended May 31, 2014 , respectively.

Noncontrolling Interests (Table

Noncontrolling Interests (Tables)	6 Months Ended
	May. 31, 2015
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 May 31, 2015 and November 30, 2014 (in thousands): May 31, 2015 November 30, 2014 Global Equity Event Opportunity Fund, LLC (1) $ 34,245 $ 33,303 Other 5,823 5,545 Noncontrolling interests $ 40,068 $ 38,848 (1) Noncontrolling interests attributed to Leucadia were $26.1 million and $25.4 million at May 31, 2015 and November 30, 2014 , respectively.

Benefit Plans (Tables)

Benefit Plans (Tables)	6 Months Ended
	May. 31, 2015
Item Effected [Line Items]
Components of Net Periodic Pension (Benefit) Cost	The components of net periodic pension (income) cost for our pension plans are as follows (in thousands): Three Months Ended May 31, Six Months Ended May 31, U.S. Pension Plan 2015 2014 2015 2014 Components of net periodic pension (income) cost: Service cost $ 63 $ 56 $ 126 $ 112 Interest cost on projected benefit obligation 585 607 1,170 1,214 Expected return on plan assets (848 ) (789 ) (1,696 ) (1,578 ) Net amortization — (36 ) — (72 ) Net periodic pension income $ (200 ) $ (162 ) $ (400 ) $ (324 )
German Pension Plan [Member]
Item Effected [Line Items]
Components of Net Periodic Pension (Benefit) Cost	Three Months Ended May 31, Six Months Ended May 31, German Pension Plan 2015 2014 2015 2014 Components of net periodic pension cost: Service cost $ — $ 11 $ — $ 22 Interest cost on projected benefit obligation 127 221 263 442 Net amortization 79 63 163 125 Net periodic pension cost $ 206 $ 295 $ 426 $ 589

Compensation Plans (Tables)

Compensation Plans (Tables)	6 Months Ended
	May. 31, 2015
Compensation Related Costs [Abstract]
Schedule of Components of Compensation Cost	The components of total compensation cost associated with certain of our compensation plans are as follows (in millions): Three Months Ended May 31, Six Months Ended May 31, 2015 2014 2015 2014 Components of compensation cost: Restricted cash awards $ 48.2 35.0 103.5 $ 78.2 Restricted stock and RSUs (1) 14.5 18.1 40.0 50.0 Profit sharing plan 1.4 1.4 4.7 4.8 Total compensation cost $ 64.1 $ 54.5 $ 148.2 $ 133.0 (1) Total compensation cost associated with restricted stock and RSUs includes the amortization of sign-on, retention and senior executive awards, less forfeitures and clawbacks. Additionally, we recognize compensation cost related to the discount provided to employees in electing to defer compensation under the Deferred Compensation Plan.
Schedule of Remaining Unamortized Amounts Related to Certain Compensation Plans	Remaining unamortized amounts related to certain compensation plans at May 31, 2015 is as follows (in millions): Remaining Unamortized Amounts Weighted Average Vesting Period (in Years) Non-vested share-based awards $ 56.0 1.8 Restricted cash awards 314.0 3 Total $ 370.0

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	May. 31, 2015
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 California 2006 New Jersey 2007 New York State 2001 New York City 2003 United Kingdom 2013

Commitments, Contingencies an42

Commitments, Contingencies and Guarantees (Tables)	6 Months Ended
	May. 31, 2015
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 May 31, 2015 (in millions): Expected Maturity Date 2015 2016 2017 and 2019 and 2021 and Maximum Equity commitments (1) $ — $ 9.2 $ 0.9 $ — $ 257.7 $ 267.8 Loan commitments (1) 34.3 475.7 387.4 60.1 — 957.5 Mortgage-related and other purchase commitments 909.9 1,330.6 499.1 — — 2,739.6 Underwriting commitments 36.9 — — — — 36.9 Forward starting reverse repos and repos 2,384.4 — — — — 2,384.4 Other unfunded commitments (1) 30.0 — — 6.0 37.5 73.5 $ 3,395.5 $ 1,815.5 $ 887.4 $ 66.1 $ 295.2 $ 6,459.7 (1) Equity, loan 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 May 31, 2015 . 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 2015 2016-2020 2021 and Total Corporate Corporate Non-investment grade. $ — $ 171.9 $ — $ 171.9 $ 9.7 $ 162.2 Unrated 115.0 864.6 — 979.6 184.3 795.3 Total $ 115.0 $ 1,036.5 $ — $ 1,151.5 $ 194.0 $ 957.5 (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 $215.3 million of funded loans included in Financial instruments owned—Loans and Loans to and investments in related parties, and a $21.3 million net liability related to lending commitments recorded in Financial instruments sold, not yet purchased—Derivatives and Financial instruments owned—Derivatives in the Consolidated Statement of Financial Condition at May 31, 2015 . (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 May 31, 2015 (in millions): Expected Maturity Date Guarantee Type: 2015 2016 2017 and 2019 2021 and Later Notional/ Derivative contracts—non-credit related $ 28,156.7 $ 3,319.6 $ 614.6 $ 644.4 $ 430.6 $ 33,165.9 Written derivative contracts—credit related 2.0 — — 1,436.3 20.0 1,458.3 Total derivative contracts $ 28,158.7 $ 3,319.6 $ 614.6 $ 2,080.7 $ 450.6 $ 34,624.2
External Credit Ratings of Underlying or Referenced Assets for Credit Related Derivatives Contracts	At May 31, 2015 the external credit ratings of the underlyings or referenced assets for our credit related derivatives contracts (in millions): External Credit Rating AAA/ Aaa AA/Aa A BBB/ Baa Below Investment Grade Unrated Notional/ Maximum Payout Credit related derivative contracts: Index credit default swaps $ 1,324.3 $ — $ — $ — $ — $ — $ 1,324.3 Single name credit default swaps $ — $ — $ 22.0 $ 24.0 $ 88.0 $ — $ 134.0

Net Capital Requirements (Table

Net Capital Requirements (Tables)	6 Months Ended
	May. 31, 2015
Brokers and Dealers [Abstract]
Net Capital, Adjusted and Excess Net Capital	At May 31, 2015 , Jefferies and Jefferies Execution’s net capital and excess net capital were as follows (in thousands): Net Capital Excess Net Capital Jefferies $ 998,320 $ 913,625 Jefferies Execution 7,800 7,550

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	May. 31, 2015
Segment Reporting [Abstract]
Net Revenues, Expenses and Total Assets by Segment	Our net revenues and expenses by segment are summarized below (in millions): Three Months Ended May 31, Six Months Ended May 31, 2015 2014 2015 2014 Capital Markets: Net revenues $ 789.1 $ 717.8 $ 1,351.5 $ 1,594.7 Expenses $ 692.4 $ 617.1 $ 1,264.7 $ 1,322.8 Asset Management: Net revenues $ 2.5 $ 5.2 $ 31.7 $ 27.3 Expenses $ 14.4 $ 6.7 $ 20.9 $ 17.8 Total: Net revenues $ 791.6 $ 723.0 $ 1,383.2 $ 1,622.0 Expenses $ 706.8 $ 623.8 $ 1,285.6 $ 1,340.6 The following table summarizes our total assets by segment at May 31, 2015 and November 30, 2014 (in millions): May 31, 2015 November 30, 2014 Segment assets: Capital Markets $ 43,465.3 $ 44,002.6 Asset Management 676.5 515.0 Total assets $ 44,141.8 $ 44,517.6
Net Revenues by Geographic Region	Net revenues by geographic region were as follows (in thousands): Three Months Ended May 31, Six Months Ended May 31, 2015 2014 2015 2014 Americas (1) $ 616,857 $ 538,930 $ 1,053,643 $ 1,231,985 Europe (2) 148,998 159,983 288,204 346,774 Asia 25,699 24,079 41,379 43,261 Net revenues $ 791,554 $ 722,992 $ 1,383,226 $ 1,622,020 (1) Substantially all relates to U.S. results. (2) Substantially all relates to U.K. results.

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	May. 31, 2015
Related Party Transactions [Abstract]
Summary of Interest Income, Other Revenues and Investment Income Attributable to Related Party Private Equity Funds	The following table presents other revenues and investment income (loss) related to net gains and losses on our investment in Private Equity Related Funds (in thousands): Three Months Ended May 31, Six Months Ended May 31, 2015 2014 2015 2014 Other revenues and investment income (loss) $ 947 $ (9,036 ) (24,212 ) (11,459 )
Schedule of Revenue by Service	The following table presents the revenues earned by type of services provided (in thousands): Three Months Ended May 31, 2015 Six Months Ended May 31, 2015 Investment banking and advisory $ 200 $ 21,200 Asset management 119 303 Commissions 1 37

Exit Costs (Tables)

Exit Costs (Tables)	6 Months Ended
	May. 31, 2015
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	Restructuring costs are wholly attributed to our Capital Markets segment and were recorded in the following categories on the Consolidated Statement of Earnings for the three months ended May 31, 2015 (in thousands): Three Months Ended May 31, 2015 Compensation and benefits $ 20,019 Technology and communications 6,260 Professional services 2,033 Other expenses 258 Total $ 28,570 During the three months ended May 31, 2015, we recorded restructuring and impairment costs as follows (in thousands): Three Months Ended May 31, 2015 Severance costs $ 15,559 Accelerated amortization of restricted stock and restricted cash awards 4,460 Accelerated amortization of capitalized software 6,260 Other expenses 2,291 Total $ 28,570
Schedule of Restructuring Reserve	The following summarizes our restructuring reserve activity (in thousands): Severance costs Other costs Total restructuring costs Accelerated amortization of restricted stock and restricted cash awards Accelerated amortization of capitalized software Total Balance at February 28, 2015 $ — $ — $ — Expenses 15,559 2,291 17,850 $ 4,460 $ 6,260 $ 28,570 Payments (2,523 ) (1,518 ) (4,041 ) Liability at May 31, 2015 $ 13,036 $ 773 $ 13,809

Organization and Basis of Pre47

Organization and Basis of Presentation (Detail) $ in Millions	3 Months Ended	6 Months Ended
	May. 31, 2015	May. 31, 2015segment	May. 31, 2014USD ($)
Organization And Basis Of Presentation [Line Items]
Percent of accounts transfered	50.00%
Number of operating segments | segment		2
Increase (decrease) in receivables from brokers, dealers and clearing organization			$ (30.3)
Increase (decrease) in receivable from customers			30.3
Increase (decrease) in payables to brokers, dealers and clearing organization			13.3
Increase (decrease) in payables to customers			$ (13.3)
3.875% Convertible Senior Debentures due 2029 [Member]
Organization And Basis Of Presentation [Line Items]
Convertible Senior Debentures, interest rate	3.875%	3.875%

Summary of Significant Accoun48

Summary of Significant Accounting Policies (Detail) - May. 31, 2015 - USD ($) $ in Millions	Total
Summary Of Significant Accounting Policies [Line Items]
More than percentage of tax benefit realized upon ultimate settlement with taxing authority	50.00%
Investigation reserve	$ 0.7
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

Accounting Developments (Detail

Accounting Developments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	May. 31, 2014	Nov. 30, 2014	Nov. 30, 2013
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Decrease in Level 3 assets	$ 72.6	$ 95.6	$ 94.9	$ 97.1	$ 91.6

Fair Value Disclosures - Additi

Fair Value Disclosures - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014	Nov. 30, 2014
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Investments at fair value	$ 42,500,000		$ 42,500,000		$ 42,200,000
Other secured financings	709,567,000		709,567,000		605,824,000
Transfers of assets from Level 2 to Level 3	98,400,000	$ 95,200,000	155,000,000	$ 94,900,000
Transfers of assets from Level 3 to Level 2	96,400,000	59,400,000	87,000,000	55,300,000
Transfers of liabilities from Level 2 to Level 3		11,700,000		2,800,000
Transfers of liabilities from Level 3 to Level 2		3,900,000	3,000,000
Net gains/(losses) on Level 3 assets (realized and unrealized)	2,400,000	22,500,000	(17,300,000)	39,400,000
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	5,000,000	(4,800,000)	(1,900,000)	(6,500,000)
Unadjusted net asset value of the funds			178,700,000		137,800,000
Unadjusted net liability value of the funds			500,000		300,000
Aggregate fair value of loans and other receivables	13,900,000		13,900,000		0
Loan and other receivables on nonaccrual status	332,000,000		332,000,000		274,600,000
Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Other secured financings	3,900,000		3,900,000		$ 7,800,000
Corporate debt securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Transfers of assets from Level 2 to Level 3	8,200,000	600,000	10,400,000	300,000
Transfers of liabilities from Level 2 to Level 3				100,000
Net gains/(losses) on Level 3 assets (realized and unrealized)	(532,000)	5,659,000	(796,000)	5,116,000
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 equity securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Transfers of assets from Level 2 to Level 3	1,400,000	11,600,000	1,600,000	11,500,000
Transfers of assets from Level 3 to Level 2	7,000,000	7,400,000	10,300,000	3,600,000
Net gains/(losses) on Level 3 assets (realized and unrealized)	8,030,000	(178,000)	7,066,000	(1,583,000)
Collateralized debt obligations [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Transfers of assets from Level 2 to Level 3	48,000,000	7,100,000	27,300,000	14,300,000
Transfers of assets from Level 3 to Level 2	54,400,000	4,700,000	52,300,000	3,600,000
Net gains/(losses) on Level 3 assets (realized and unrealized)	(5,120,000)	4,706,000	(17,229,000)	14,169,000
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	30,000,000	5,500,000	20,300,000	20,900,000
Transfers of assets from Level 3 to Level 2	23,000,000	35,600,000	15,100,000	34,300,000
Net gains/(losses) on Level 3 assets (realized and unrealized)	(1,820,000)	(791,000)	(3,735,000)	(4,114,000)
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	7,700,000	14,200,000	10,200,000	8,400,000
Transfers of assets from Level 3 to Level 2	5,500,000	2,300,000	3,500,000	400,000
Net gains/(losses) on Level 3 assets (realized and unrealized)	(789,000)	(903,000)	(1,124,000)	(2,191,000)
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	2,100,000	29,900,000	2,100,000	25,500,000
Transfers of assets from Level 3 to Level 2	5,400,000	1,800,000		3,500,000
Net gains/(losses) on Level 3 assets (realized and unrealized)	(19,000)	(314,000)	(258,000)	(537,000)
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	1,000,000	26,300,000	13,900,000	14,200,000
Transfers of assets from Level 3 to Level 2		1,100,000	5,300,000	2,600,000
Net gains/(losses) on Level 3 assets (realized and unrealized)	(748,000)	11,933,000	(5,795,000)	3,946,000
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			69,200,000
Transfers of assets from Level 3 to Level 2		6,500,000		7,200,000
Net gains/(losses) on Level 3 assets (realized and unrealized)	$ 3,380,000	$ 2,349,000	$ 4,615,000	$ 24,601,000
3.875% Convertible Senior Debentures due 2029 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Debt instrument interest rate	3.875%		3.875%
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	3.875%		3.875%
Debt instrument maturity year			Nov. 1, 2029
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			Nov. 1, 2017

Fair Value Disclosures - Financ

Fair Value Disclosures - Financial Assets and Liabilities Accounted for at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	May. 31, 2015	Nov. 30, 2014
Financial instruments owned:
Corporate equity securities	$ 2,846,831	$ 2,426,242
Corporate debt securities	3,425,443	3,365,042
Collateralized debt obligations	255,821	430,868
U.S. government and federal agency securities	2,922,875	2,775,541
Municipal securities	638,604	590,849
Sovereign obligations	2,497,735	2,759,511
Loans and other receivables	1,708,575	1,556,018
Derivatives	402,089	406,268
Investments at fair value	132,061	126,372
Physical commodities	45,191	62,234
Total financial instruments owned, excluding Investments at fair value based on NAV	18,800,715	18,594,443
Counterparty and Cash Collateral Netting	(4,106,430)	(4,759,345)
Cash and cash equivalents	3,288,758	4,079,968
Cash and securities segregated and on deposit for regulatory purposes	2,396,114	3,444,674
Securities received as collateral	9,623	5,418
Financial instruments sold, not yet purchased:
Corporate equity securities	2,191,220	1,985,864
Corporate debt securities	1,569,882	1,612,217
Collateralized debt obligations		4,557
U.S. government and federal agency securities	2,090,062	2,253,055
Sovereign obligations	2,076,967	1,791,085
Loans	968,329	870,975
Derivatives	250,722	363,515
Total financial instruments sold, not yet purchased	9,195,450	8,881,268
Counterparty and Cash Collateral Netting	(4,205,980)	(4,856,618)
Obligation to return securities received as collateral	9,623	5,418
Other secured financings	56,060	30,825
Embedded conversion option	725	693
Residential mortgage-backed securities [Member]
Financial instruments owned:
Mortgage- and asset-backed securities, assets	2,898,231	2,962,511
Financial instruments sold, not yet purchased:
Residential mortgage-backed securities	48,268
Commercial mortgage-backed securities [Member]
Financial instruments owned:
Mortgage- and asset-backed securities, assets	926,671	993,306
Other asset-backed securities [Member]
Financial instruments owned:
Mortgage- and asset-backed securities, assets	100,588	139,681
Level 1 [Member]
Financial instruments owned:
Corporate equity securities	2,639,204	2,178,837
Corporate debt securities	0	0
Collateralized debt obligations	0	0
U.S. government and federal agency securities	2,615,590	2,694,268
Municipal securities	0	0
Sovereign obligations	1,256,242	1,968,747
Loans and other receivables	0	0
Derivatives	64,371	65,145
Investments at fair value	0	0
Physical commodities	0	0
Total financial instruments owned, excluding Investments at fair value based on NAV	6,575,407	6,906,997
Cash and cash equivalents	3,288,758	4,079,968
Cash and securities segregated and on deposit for regulatory purposes	2,396,114	3,444,674
Securities received as collateral	9,623	5,418
Financial instruments sold, not yet purchased:
Corporate equity securities	2,134,344	1,911,145
Corporate debt securities	0	0
Collateralized debt obligations		0
U.S. government and federal agency securities	1,955,173	2,253,055
Sovereign obligations	1,228,416	1,217,075
Loans	0	0
Derivatives	38,035	52,778
Total financial instruments sold, not yet purchased	5,355,968	5,434,053
Obligation to return securities received as collateral	9,623	5,418
Other secured financings	0	0
Embedded conversion option	0	0
Level 1 [Member] | Residential mortgage-backed securities [Member]
Financial instruments owned:
Mortgage- and asset-backed securities, assets	0	0
Financial instruments sold, not yet purchased:
Residential mortgage-backed securities	0
Level 1 [Member] | Commercial mortgage-backed securities [Member]
Financial instruments owned:
Mortgage- and asset-backed securities, assets	0	0
Level 1 [Member] | Other asset-backed securities [Member]
Financial instruments owned:
Mortgage- and asset-backed securities, assets	0	0
Level 2 [Member]
Financial instruments owned:
Corporate equity securities	187,080	226,441
Corporate debt securities	3,393,526	3,342,276
Collateralized debt obligations	166,814	306,218
U.S. government and federal agency securities	307,285	81,273
Municipal securities	638,604	590,849
Sovereign obligations	1,241,493	790,764
Loans and other receivables	1,599,819	1,458,760
Derivatives	4,404,136	5,046,278
Investments at fair value	718	73,148
Physical commodities	45,191	62,234
Total financial instruments owned, excluding Investments at fair value based on NAV	15,791,742	15,962,233
Cash and cash equivalents	0	0
Cash and securities segregated and on deposit for regulatory purposes	0	0
Securities received as collateral	0	0
Financial instruments sold, not yet purchased:
Corporate equity securities	56,838	74,681
Corporate debt securities	1,569,430	1,611,994
Collateralized debt obligations		4,557
U.S. government and federal agency securities	134,889	0
Sovereign obligations	848,551	574,010
Loans	957,597	856,525
Derivatives	4,380,241	5,117,803
Total financial instruments sold, not yet purchased	7,995,814	8,239,570
Obligation to return securities received as collateral	0	0
Other secured financings	0	0
Embedded conversion option	0	0
Level 2 [Member] | Residential mortgage-backed securities [Member]
Financial instruments owned:
Mortgage- and asset-backed securities, assets	2,809,536	2,879,954
Financial instruments sold, not yet purchased:
Residential mortgage-backed securities	48,268
Level 2 [Member] | Commercial mortgage-backed securities [Member]
Financial instruments owned:
Mortgage- and asset-backed securities, assets	908,809	966,651
Level 2 [Member] | Other asset-backed securities [Member]
Financial instruments owned:
Mortgage- and asset-backed securities, assets	88,731	137,387
Level 3 [Member]
Financial instruments owned:
Corporate equity securities	20,547	20,964
Corporate debt securities	31,917	22,766
Collateralized debt obligations	89,007	124,650
U.S. government and federal agency securities	0	0
Municipal securities	0	0
Sovereign obligations	0	0
Loans and other receivables	108,756	97,258
Derivatives	40,012	54,190
Investments at fair value	131,343	53,224
Physical commodities	0	0
Total financial instruments owned, excluding Investments at fair value based on NAV	539,996	484,558
Cash and cash equivalents	0	0
Cash and securities segregated and on deposit for regulatory purposes	0	0
Securities received as collateral	0	0
Financial instruments sold, not yet purchased:
Corporate equity securities	38	38
Corporate debt securities	452	223
Collateralized debt obligations		0
U.S. government and federal agency securities	0	0
Sovereign obligations	0	0
Loans	10,732	14,450
Derivatives	38,426	49,552
Total financial instruments sold, not yet purchased	49,648	64,263
Obligation to return securities received as collateral	0	0
Other secured financings	56,060	30,825
Embedded conversion option	725	693
Level 3 [Member] | Residential mortgage-backed securities [Member]
Financial instruments owned:
Mortgage- and asset-backed securities, assets	88,695	82,557
Financial instruments sold, not yet purchased:
Residential mortgage-backed securities	0
Level 3 [Member] | Commercial mortgage-backed securities [Member]
Financial instruments owned:
Mortgage- and asset-backed securities, assets	17,862	26,655
Level 3 [Member] | Other asset-backed securities [Member]
Financial instruments owned:
Mortgage- and asset-backed securities, assets	$ 11,857	$ 2,294

Fair Value Disclosures - Fina52

Fair Value Disclosures - Financial Assets and Liabilities Accounted for at Fair Value on Recurring Basis (Footnote) (Detail) - USD ($)	May. 31, 2015	Nov. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of equity options transferred from Level 1 to Level 2 within Financial instruments owned	$ 0	$ 6,100,000
Fair value of equity options transferred from Level 1 to Level 2 within Financial instruments sold, not yet purchased		6,600,000
Assets at fair value segregated for regulatory purposes	525,000,000	453,700,000
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Increase corporate debt obligations		33,200,000
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets at fair value segregated for regulatory purposes	$ 190,000,000	$ 545,000,000

Fair Value Disclosures - Invest

Fair Value Disclosures - Investments Measured at Fair Value Based on Net Asset Value Per Share (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	May. 31, 2015	Nov. 30, 2014
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 101,149	$ 116,581
Unfunded Commitments	25,764	26,117
Equity Long/Short Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	53,360	44,983
Unfunded Commitments	$ 0	$ 0
Redemption Frequency (if currently eligible)	Monthly, Quarterly	Monthly, Quarterly
Fixed Income and High Yield Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 2,679	$ 2,704
Unfunded Commitments	$ 0	$ 0
Redemption Frequency (if currently eligible)	0	0
Fund of Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 339	$ 323
Unfunded Commitments	$ 94	$ 94
Redemption Frequency (if currently eligible)	0	0
Equity Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 41,311	$ 65,216
Unfunded Commitments	$ 25,670	$ 26,023
Redemption Frequency (if currently eligible)	0	0
Convertible Bond Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 3,460	$ 3,355
Unfunded Commitments	$ 0	$ 0
Redemption Frequency (if currently eligible)	At Will	At Will

Fair Value Disclosures - Inve54

Fair Value Disclosures - Investments Measured at Fair Value Based on Net Asset Value Per Share (Footnote) (Detail) - USD ($) $ in Thousands	6 Months Ended
	May. 31, 2015	May. 31, 2014	Nov. 30, 2014
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Investments, at fair value	$ 132,061		$ 126,372
Increase in funds	$ (16,525)	$ (12,469)
Equity Long/Short Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of redeemable investments	100.00%		99.00%
Fixed Income and High Yield Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of investments with no redemption provisions	7.00%		8.00%
Increase in funds	$ 2,500
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%		95.00%
Estimated period for the liquidation of the underlying assets, Maximum	2 years
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
Investments which are not investment companies [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Investments, at fair value	$ 131,200		$ 126,300
Minimum [Member] | Equity Long/Short Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notice period redemption of investment prior written notice period	30 days
Maximum [Member] | Equity Long/Short Hedge Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Notice period redemption of investment prior written notice period	90 days

Fair Value Disclosures - Summar

Fair Value Disclosures - Summary of Changes in Fair Value of Financial Assets and Liabilities Classified as Level 3 (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Assets:
Total gains/(losses) (realized and unrealized)	$ 2,400	$ 22,500	$ (17,300)	$ 39,400
Liabilities:
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	5,000	(4,800)	(1,900)	(6,500)
Corporate equity securities [Member]
Liabilities:
Beginning Balance	38	1,015	38	38
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	0	(977)	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Issuances	0		0	0
Net transfers into/ (out of) Level 3	0	0	0	0
Ending Balance	38	38	38	38
Change in unrealized gains/ (losses) relating to instruments still held	0	558	0	0
Corporate debt securities [Member]
Liabilities:
Beginning Balance	0	0	223	0
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	339	(84)	225	(203)
Purchases	0	(4,082)	(6,677)	(28,319)
Sales	113	3,012	6,804	31,431
Settlements	0	0	0	0
Issuances	0		0	0
Net transfers into/ (out of) Level 3	0	3,934	(123)	(129)
Ending Balance	452	2,780	452	2,780
Change in unrealized gains/ (losses) relating to instruments still held	(339)	84	(339)	203
Net derivatives [Member]
Liabilities:
Beginning Balance	3,314	5,773	(4,638)	6,905
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	(4,912)	9,485	1,925	11,591
Purchases	(11,963)	(2,150)	(8,848)	(179)
Sales	0	2,149	120	(21)
Settlements	12,078	25	8,395	318
Issuances	389		1,460	0
Net transfers into/ (out of) Level 3	(492)	0	0	(3,332)
Ending Balance	(1,586)	15,282	(1,586)	15,282
Change in unrealized gains/ (losses) relating to instruments still held	4,912	(9,485)	(3,586)	(11,591)
Loans [Member]
Liabilities:
Beginning Balance	9,327	10,260	14,450	22,462
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	(332)	62	(277)	754
Purchases	(1,170)	(9,629)	(759)	(22,491)
Sales	350	18,995	350	27,908
Settlements	2,557	139	0	139
Issuances	0		0	0
Net transfers into/ (out of) Level 3	0	11,707	(3,032)	2,762
Ending Balance	10,732	31,534	10,732	31,534
Change in unrealized gains/ (losses) relating to instruments still held	332	(57)	277	(57)
Other secured financings [Member]
Liabilities:
Beginning Balance	65,602	30,394	30,825	8,711
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	0	0	0	0
Purchases	0	(992)	0	0
Sales	0	0	0	0
Settlements	(9,542)	(9,114)	(11,760)	(9,114)
Issuances	0		36,995	20,691
Net transfers into/ (out of) Level 3	0	0	0	0
Ending Balance	56,060	20,288	56,060	20,288
Change in unrealized gains/ (losses) relating to instruments still held	0	0	0	0
Embedded conversion option [Member]
Liabilities:
Beginning Balance	825	7,607	693	9,574
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	(100)	(3,712)	32	(5,679)
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Issuances	0		0	0
Net transfers into/ (out of) Level 3	0	0	0	0
Ending Balance	725	3,895	725	3,895
Change in unrealized gains/ (losses) relating to instruments still held	100	3,712	(32)	5,679
Corporate equity securities [Member]
Assets:
Beginning Balance	18,210	12,341	20,964	9,884
Total gains/(losses) (realized and unrealized)	8,030	(178)	7,066	(1,583)
Purchases	0	90	1,469	608
Sales	(73)	(84)	(262)	(370)
Settlements	0	0	0	0
Issuances	0		0	0
Net transfers into/ (out of) Level 3	(5,620)	4,233	(8,690)	7,863
Ending Balance	20,547	16,402	20,547	16,402
Change in unrealized gains/(losses) relating to instruments still held	8,073	(178)	7,077	(494)
Corporate debt securities [Member]
Assets:
Beginning Balance	24,795	29,315	22,766	25,666
Total gains/(losses) (realized and unrealized)	(532)	5,659	(796)	5,116
Purchases	2,183	1,937	3,095	3,835
Sales	(2,368)	(5,831)	(3,445)	(3,224)
Settlements	0	0	0	0
Issuances	0		0	0
Net transfers into/ (out of) Level 3	7,839	568	10,297	255
Ending Balance	31,917	31,648	31,917	31,648
Change in unrealized gains/(losses) relating to instruments still held	(922)	7,999	(929)	7,420
Collateralized debt obligations [Member]
Assets:
Beginning Balance	96,837	66,028	124,650	37,216
Total gains/(losses) (realized and unrealized)	(5,120)	4,706	(17,229)	14,169
Purchases	29,021	19,146	66,246	36,200
Sales	(25,430)	(49,636)	(59,532)	(55,963)
Settlements	0	(331)	(147)	0
Issuances	0		0	0
Net transfers into/ (out of) Level 3	(6,301)	2,400	(24,981)	10,691
Ending Balance	89,007	42,313	89,007	42,313
Change in unrealized gains/(losses) relating to instruments still held	(2,328)	238	(8,989)	5,656
Sovereign obligations [Member]
Assets:
Beginning Balance	333
Total gains/(losses) (realized and unrealized)	(12)
Purchases	320
Sales	(641)
Settlements	0
Issuances	0
Net transfers into/ (out of) Level 3	0
Ending Balance	0		0
Change in unrealized gains/(losses) relating to instruments still held	0
Residential mortgage-backed securities [Member]
Assets:
Beginning Balance	79,953	116,992	82,557	105,492
Total gains/(losses) (realized and unrealized)	(1,820)	(791)	(3,735)	(4,114)
Purchases	8,733	10,955	24,083	21,893
Sales	(4,915)	(24,618)	(18,899)	(37,356)
Settlements	(323)	(459)	(477)	(529)
Issuances	0		0	0
Net transfers into/ (out of) Level 3	7,067	(30,117)	5,166	(13,424)
Ending Balance	88,695	71,962	88,695	71,962
Change in unrealized gains/(losses) relating to instruments still held	315	(422)	(822)	(1,324)
Commercial mortgage-backed securities [Member]
Assets:
Beginning Balance	24,629	17,486	26,655	17,568
Total gains/(losses) (realized and unrealized)	(789)	(903)	(1,124)	(2,191)
Purchases	1,256	18,026	4,685	32,449
Sales	(9,237)	(21,038)	(12,128)	(29,864)
Settlements	(173)	(1,189)	(6,971)	(1,710)
Issuances	0		0	0
Net transfers into/ (out of) Level 3	2,176	11,864	6,745	7,994
Ending Balance	17,862	24,246	17,862	24,246
Change in unrealized gains/(losses) relating to instruments still held	(759)	(1,933)	(496)	(3,236)
Other asset-backed securities [Member]
Assets:
Beginning Balance	7,146	2,375	2,294	12,611
Total gains/(losses) (realized and unrealized)	(19)	(314)	(258)	(537)
Purchases	8,322	15,686	8,385	17,361
Sales	(80)	0	(79)	(5,496)
Settlements	(270)	(438)	(207)	(438)
Issuances	0		0	0
Net transfers into/ (out of) Level 3	(3,242)	28,135	1,722	21,943
Ending Balance	11,857	45,444	11,857	45,444
Change in unrealized gains/(losses) relating to instruments still held	41	(314)	(97)	(569)
Loans and other receivables [Member]
Assets:
Beginning Balance	111,410	128,832	97,258	145,890
Total gains/(losses) (realized and unrealized)	(748)	11,933	(5,795)	3,946
Purchases	40,602	42,278	71,865	92,579
Sales	(26,335)	(48,064)	(29,184)	(88,674)
Settlements	(16,314)	(21,482)	(33,895)	(26,685)
Issuances	0		0	0
Net transfers into/ (out of) Level 3	141	25,146	8,507	11,587
Ending Balance	108,756	138,643	108,756	138,643
Change in unrealized gains/(losses) relating to instruments still held	(669)	11,922	(3,166)	3,382
Investments at fair value [Member]
Assets:
Beginning Balance	128,232	82,205	53,224	66,931
Total gains/(losses) (realized and unrealized)	3,380	2,349	4,615	24,601
Purchases	73	5,160	5,270	27,660
Sales	(78)	(3,946)	(427)	(32,648)
Settlements	(264)	0	(541)	0
Issuances	0		0	0
Net transfers into/ (out of) Level 3	0	(6,452)	69,202	(7,228)
Ending Balance	131,343	79,316	131,343	79,316
Change in unrealized gains/(losses) relating to instruments still held	$ 3,482	$ (299)	$ 4,882	$ 21,954

Fair Value Disclosures - Quanti

Fair Value Disclosures - Quantitative Information about Significant Unobservable Inputs Used in Level 3 Fair Value Measurements (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	May. 31, 2015	Nov. 30, 2014	Feb. 28, 2015	May. 31, 2014	Feb. 28, 2014	Nov. 30, 2013
Embedded conversion option [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Sold, Not Yet Purchased	$ 725	$ 693	$ 825	$ 3,895	$ 7,607	$ 9,574
Corporate equity securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	20,547	20,964	18,210	16,402	12,341	9,884
Corporate debt securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	31,917	22,766	24,795	31,648	29,315	25,666
Collateralized debt obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	89,007	124,650	96,837	42,313	66,028	37,216
Residential mortgage-backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	88,695	82,557	79,953	71,962	116,992	105,492
Commercial mortgage-backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	17,862	26,655	24,629	24,246	17,486	17,568
Other asset-backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	11,857	2,294	7,146	45,444	2,375	12,611
Loans and other receivables [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	108,756	97,258	111,410	138,643	128,832	145,890
Investments at fair value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	131,343	53,224	$ 128,232	$ 79,316	$ 82,205	$ 66,931
Financial Instruments Owned [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	40,012	54,190
Financial Instruments Owned [Member] | Corporate equity securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	18,647	19,814
Financial Instruments Owned [Member] | Corporate debt securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	31,917	22,766
Financial Instruments Owned [Member] | Collateralized debt obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	46,565	41,784
Financial Instruments Owned [Member] | Residential mortgage-backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	88,695	82,557
Financial Instruments Owned [Member] | Commercial mortgage-backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	17,862	26,655
Financial Instruments Owned [Member] | Other asset-backed securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	11,857	2,294
Financial Instruments Owned [Member] | Loans and other receivables [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	99,094	88,154
Financial Instruments Owned [Member] | Investments at fair value [Member] | Private equity securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Owned	6,627	8,500
Financial Instruments Sold, Not Yet Purchased [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Sold, Not Yet Purchased	38,426	49,552
Financial Instruments Sold, Not Yet Purchased [Member] | Embedded conversion option [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Sold, Not Yet Purchased	725	693
Financial Instruments Sold, Not Yet Purchased [Member] | Loans and other receivables [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Sold, Not Yet Purchased	10,732	14,450
Financial Instruments Sold, Not Yet Purchased [Member] | Other secured financings at fair value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Market Value of Financial Instruments Sold, Not Yet Purchased	$ 56,060	$ 30,825
Level 3 [Member] | Financial Instruments Owned [Member] | Market approach [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	8.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Discounted cash flows [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Discount rate/yield	24.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Minimum [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility	11.00%	13.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Maximum [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility	23.00%	23.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Weighted Average [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 99.9
Level 3 [Member] | Financial Instruments Owned [Member] | Weighted Average [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility	13.00%	17.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Unfunded commitment [Member] | Minimum [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 83
Level 3 [Member] | Financial Instruments Owned [Member] | Unfunded commitment [Member] | Maximum [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	100
Level 3 [Member] | Financial Instruments Owned [Member] | Commodity forwards [Member] | Discounted cash flows [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Discount rate/yield		17.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loan commitments [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price		$ 100
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Underlying stock price	$ 5.3
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Scenario analysis [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Estimated recovery percentage	79.00%	24.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Non-exchange traded securities [Member] | Minimum [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple	4.8	3.4
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Non-exchange traded securities [Member] | Maximum [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple	5.9	4.7
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate equity securities [Member] | Non-exchange traded securities [Member] | Weighted Average [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple	5.4	3.6
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate debt securities [Member] | Convertible bond model [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Discount rate/yield	35.00%	32.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Corporate debt securities [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Discount rate/yield	22.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Collateralized debt obligations [Member] | Minimum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	0.00%	0.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	0.00%	0.00%
Significant Unobservable Input(s), Loss severity	25.00%	0.00%
Significant Unobservable Input(s), Yield	10.00%	2.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Collateralized debt obligations [Member] | Maximum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	20.00%	20.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	2.00%	2.00%
Significant Unobservable Input(s), Loss severity	100.00%	70.00%
Significant Unobservable Input(s), Yield	22.00%	51.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Collateralized debt obligations [Member] | Weighted Average [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	17.00%	13.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	2.00%	2.00%
Significant Unobservable Input(s), Loss severity	39.00%	39.00%
Significant Unobservable Input(s), Yield	11.00%	16.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Residential mortgage-backed securities [Member] | Minimum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	0.00%	1.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	1.00%	1.00%
Significant Unobservable Input(s), Loss severity	30.00%	20.00%
Significant Unobservable Input(s), Yield	0.00%	3.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Residential mortgage-backed securities [Member] | Maximum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	50.00%	50.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	100.00%	100.00%
Significant Unobservable Input(s), Loss severity	90.00%	80.00%
Significant Unobservable Input(s), Yield	12.00%	13.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Residential mortgage-backed securities [Member] | Weighted Average [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	13.00%	13.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	17.00%	14.00%
Significant Unobservable Input(s), Loss severity	59.00%	50.00%
Significant Unobservable Input(s), Yield	5.00%	7.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Commercial mortgage-backed securities [Member] | Scenario analysis [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Estimated recovery percentage		90.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Commercial mortgage-backed securities [Member] | Minimum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	12.00%	8.00%
Significant Unobservable Input(s), Cumulative loss rate	2.00%	4.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Commercial mortgage-backed securities [Member] | Maximum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	21.00%	12.00%
Significant Unobservable Input(s), Cumulative loss rate	49.00%	72.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Commercial mortgage-backed securities [Member] | Weighted Average [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	16.00%	11.00%
Significant Unobservable Input(s), Cumulative loss rate	10.00%	15.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Other asset-backed securities [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate		8.00%
Significant Unobservable Input(s), Constant default rate/Credit spread		3.00%
Significant Unobservable Input(s), Loss severity		70.00%
Significant Unobservable Input(s), Yield		7.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Other asset-backed securities [Member] | Minimum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	3.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	3.00%
Significant Unobservable Input(s), Loss severity	60.00%
Significant Unobservable Input(s), Yield	5.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Other asset-backed securities [Member] | Maximum [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	6.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	6.00%
Significant Unobservable Input(s), Loss severity	70.00%
Significant Unobservable Input(s), Yield	7.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Other asset-backed securities [Member] | Weighted Average [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	3.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	5.00%
Significant Unobservable Input(s), Loss severity	69.00%
Significant Unobservable Input(s), Yield	5.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple	7.3
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Discounted cash flows [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	20.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	2.00%
Significant Unobservable Input(s), Loss severity	30.00%
Significant Unobservable Input(s), Yield	11.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Minimum [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple		3.4
Significant Unobservable Input(s), Yield	3.00%	3.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Minimum [Member] | Scenario analysis [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Estimated recovery percentage	10.00%	10.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Minimum [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 99	$ 100
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Maximum [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple		8.2
Significant Unobservable Input(s), Yield	10.00%	5.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Maximum [Member] | Scenario analysis [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Estimated recovery percentage	75.00%	41.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Maximum [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 100	$ 101
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Weighted Average [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), EBITDA multiple		7.6
Significant Unobservable Input(s), Yield	8.00%	4.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Weighted Average [Member] | Scenario analysis [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Estimated recovery percentage	36.00%	36.00%
Level 3 [Member] | Financial Instruments Owned [Member] | Loans and other receivables [Member] | Weighted Average [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 99.9	$ 100.3
Level 3 [Member] | Financial Instruments Owned [Member] | Investments at fair value [Member] | Private equity securities [Member] | Market approach [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Transaction level	$ 56	$ 50
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Market approach [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield		5.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant default rate/Credit spread		0.45%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Minimum [Member] | Market approach [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	5.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Minimum [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility	11.00%	13.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Maximum [Member] | Market approach [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	8.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Maximum [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility	23.00%	23.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Weighted Average [Member] | Option model [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Volatility	13.00%	17.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Discounted cash flows [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Constant prepayment rate	20.00%
Significant Unobservable Input(s), Constant default rate/Credit spread	2.00%
Significant Unobservable Input(s), Loss severity	30.00%
Significant Unobservable Input(s), Yield	11.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Minimum [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 83	$ 89
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Maximum [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 100	100
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Weighted Average [Member] | Market approach [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Yield	8.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Unfunded commitment [Member] | Weighted Average [Member] | Comparable pricing [Member] | Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 88.7	$ 92
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Embedded conversion option [Member] | Option valuation model [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Historical volatility	20.00%	19.00%
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Commercial Loan [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 100	$ 100
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Other secured financings at fair value [Member] | Minimum [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	71	81
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Other secured financings at fair value [Member] | Maximum [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	100	100
Level 3 [Member] | Financial Instruments Sold, Not Yet Purchased [Member] | Other secured financings at fair value [Member] | Weighted Average [Member] | Comparable pricing [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Significant Unobservable Input(s), Comparable bond or loan price	$ 97	$ 98.7

Fair Value Disclosures - Summ57

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 ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Financial instruments owned:
Loans and other receivables	$ (5,294)	$ 2,038	$ (2,377)	$ 1,430
Loans [Member]
Financial Instruments Sold:
Loan commitments	110	(1,555)	238	(2,591)
Loan commitments [Member]
Financial Instruments Sold:
Loan commitments	$ 5,544	$ (9,024)	$ (1,622)	$ (11,090)

Fair Value Disclosures - Summ58

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 ($) $ in Thousands	May. 31, 2015	Nov. 30, 2014
Financial instruments owned:
Loans and other receivables	$ 466,404	$ 403,119
Loans and other receivables greater than 90 days past due	29,109	5,594
Loans and other receivables on nonaccrual status	$ (16,684)	$ (22,360)

Derivative Financial Instrume59

Derivative Financial Instruments - Fair Value and Related Number of Derivative Contracts Categorized by Type of Derivative Contract (Detail) $ in Thousands	May. 31, 2015USD ($)Contract	Nov. 30, 2014USD ($)Contract
Derivatives, Fair Value [Line Items]
Net amounts per Consolidated Statements of Financial Condition, Assets	$ 402,089	$ 406,268
Net amounts per Consolidated Statements of Financial Condition, Liabilities	250,722	363,515
Exchange-traded [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	978,189	1,075,642
Fair Value, Liabilities	893,726	1,040,076
Amounts offset in the Consolidated Statements of Financial Condition, Assets	(887,594)	(1,038,992)
Amounts offset in the Consolidated Statements of Financial Condition, Liabilities	(887,594)	(1,038,992)
Cleared OTC [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	1,945,987	1,443,206
Fair Value, Liabilities	1,946,746	1,504,593
Amounts offset in the Consolidated Statements of Financial Condition, Assets	(1,912,437)	(1,416,613)
Amounts offset in the Consolidated Statements of Financial Condition, Liabilities	(1,912,437)	(1,416,613)
Bilateral OTC [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	1,584,343	2,646,765
Fair Value, Liabilities	1,616,230	2,675,464
Amounts offset in the Consolidated Statements of Financial Condition, Assets	(1,306,399)	(2,303,740)
Amounts offset in the Consolidated Statements of Financial Condition, Liabilities	(1,405,949)	(2,401,013)
Interest rate contracts [Member] | Exchange-traded [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	$ 2,892	$ 2,450
Number of Contracts, Assets | Contract	61,924	67,437
Fair Value, Liabilities	$ 1,581	$ 1,400
Number of Contracts, Liabilities | Contract	103,802	87,008
Interest rate contracts [Member] | Cleared OTC [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	$ 1,898,174	$ 1,425,375
Number of Contracts, Assets | Contract	2,681	2,160
Fair Value, Liabilities	$ 1,895,708	$ 1,481,329
Number of Contracts, Liabilities | Contract	2,963	2,124
Interest rate contracts [Member] | Bilateral OTC [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	$ 736,995	$ 871,982
Number of Contracts, Assets | Contract	1,689	1,908
Fair Value, Liabilities	$ 702,048	$ 809,962
Number of Contracts, Liabilities | Contract	1,455	729
Foreign exchange contracts [Member] | Exchange-traded [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	$ 0	$ 0
Number of Contracts, Assets | Contract	624	1,562
Fair Value, Liabilities	$ 0	$ 0
Number of Contracts, Liabilities | Contract	590	1,821
Foreign exchange contracts [Member] | Bilateral OTC [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	$ 645,414	$ 1,514,881
Number of Contracts, Assets | Contract	10,656	11,299
Fair Value, Liabilities	$ 655,504	$ 1,519,349
Number of Contracts, Liabilities | Contract	9,780	10,931
Equity contracts [Member] | Exchange-traded [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	$ 917,466	$ 1,011,101
Number of Contracts, Assets | Contract	2,909,384	2,269,044
Fair Value, Liabilities	$ 857,264	$ 987,531
Number of Contracts, Liabilities | Contract	2,819,750	2,049,513
Equity contracts [Member] | Bilateral OTC [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	$ 53,815	$ 39,889
Number of Contracts, Assets | Contract	1,056	2,463
Fair Value, Liabilities	$ 110,662	$ 70,484
Number of Contracts, Liabilities | Contract	1,208	1,956
Commodity contracts [Member] | Exchange-traded [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	$ 57,831	$ 62,091
Number of Contracts, Assets | Contract	709,590	1,027,542
Fair Value, Liabilities	$ 34,881	$ 51,145
Number of Contracts, Liabilities | Contract	712,279	1,015,894
Commodity contracts [Member] | Bilateral OTC [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	$ 134,645	$ 214,635
Number of Contracts, Assets | Contract	2,807	4,026
Fair Value, Liabilities	$ 117,082	$ 252,061
Number of Contracts, Liabilities | Contract	2,571	4,524
Credit contracts [Member] | Cleared OTC [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	$ 47,813	$ 17,831
Number of Contracts, Assets | Contract	45	27
Fair Value, Liabilities	$ 51,038	$ 23,264
Number of Contracts, Liabilities | Contract	39	22
Credit contracts [Member] | Bilateral OTC [Member]
Derivatives, Fair Value [Line Items]
Fair Value, Assets	$ 13,474	$ 5,378
Number of Contracts, Assets | Contract	68	18
Fair Value, Liabilities	$ 30,934	$ 23,608
Number of Contracts, Liabilities | Contract	47	27

Derivative Financial Instrume60

Derivative Financial Instruments - Unrealized and Realized Gains (Losses) on Derivative Contracts (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	$ (69,715)	$ (128,962)	$ (17,845)	$ (211,941)
Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	18,064	(61,367)	(24,728)	(66,485)
Foreign exchange contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	8,352	(3,718)	23,524	2,348
Equity contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	(111,682)	(73,925)	(40,641)	(170,161)
Commodity contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	5,746	21,793	20,237	37,980
Credit contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	$ 9,805	$ (11,745)	$ 3,763	$ (15,623)

Derivative Financial Instrume61

Derivative Financial Instruments - Remaining Contract Maturity of Fair Value of OTC Derivative Assets and Liabilities (Detail) $ in Thousands	May. 31, 2015USD ($)
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	$ 264,532
OTC derivative assets having maturity period of 1 to 5 years	205,794
OTC derivative assets having maturity period of greater than 5 years	129,896
OTC derivative assets cross-maturity netting	(84,874)
Total OTC derivative assets, net of cross-maturity netting	515,348
Cross product counterparty netting	(16,998)
Total OTC derivative assets included in Financial instruments owned	498,350
OTC derivative liabilities having maturity period of 0 to 12 months	270,003
OTC derivative liabilities having maturity period of 1 to 5 years	198,085
OTC derivative liabilities having maturity period of greater than 5 years	146,917
OTC derivative liabilities cross-maturity netting	(84,874)
Total OTC derivative liabilities, net of cross-maturity netting	530,131
Cross product counterparty netting	(16,998)
Total OTC derivative liabilities included in Financial instruments sold, not yet purchased	513,133
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	50,402
OTC derivative assets having maturity period of 1 to 5 years	1,592
OTC derivative assets having maturity period of greater than 5 years	21,717
OTC derivative assets cross-maturity netting	(3,562)
Total OTC derivative assets, net of cross-maturity netting	70,149
OTC derivative liabilities having maturity period of 0 to 12 months	51,982
OTC derivative liabilities having maturity period of 1 to 5 years	693
OTC derivative liabilities having maturity period of greater than 5 years	3,474
OTC derivative liabilities cross-maturity netting	(3,562)
Total OTC derivative liabilities, net of cross-maturity netting	52,587
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	12,791
OTC derivative assets having maturity period of 1 to 5 years	13,371
OTC derivative assets having maturity period of greater than 5 years	5,349
OTC derivative assets cross-maturity netting	0
Total OTC derivative assets, net of cross-maturity netting	31,511
OTC derivative liabilities having maturity period of 0 to 12 months	28,147
OTC derivative liabilities having maturity period of 1 to 5 years	37,353
OTC derivative liabilities having maturity period of greater than 5 years	15,332
OTC derivative liabilities cross-maturity netting	0
Total OTC derivative liabilities, net of cross-maturity netting	80,832
Credit default 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	0
OTC derivative assets having maturity period of 1 to 5 years	2,045
OTC derivative assets having maturity period of greater than 5 years	7,067
OTC derivative assets cross-maturity netting	(1,519)
Total OTC derivative assets, net of cross-maturity netting	7,593
OTC derivative liabilities having maturity period of 0 to 12 months	1,064
OTC derivative liabilities having maturity period of 1 to 5 years	1,334
OTC derivative liabilities having maturity period of greater than 5 years	5,636
OTC derivative liabilities cross-maturity netting	(1,519)
Total OTC derivative liabilities, net of cross-maturity netting	6,515
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	10,160
OTC derivative assets having maturity period of 1 to 5 years	2,635
OTC derivative assets having maturity period of greater than 5 years	0
OTC derivative assets cross-maturity netting	(2,564)
Total OTC derivative assets, net of cross-maturity netting	10,231
OTC derivative liabilities having maturity period of 0 to 12 months	21,311
OTC derivative liabilities having maturity period of 1 to 5 years	9
OTC derivative liabilities having maturity period of greater than 5 years	1,489
OTC derivative liabilities cross-maturity netting	(2,564)
Total OTC derivative liabilities, net of cross-maturity netting	20,245
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	143,252
OTC derivative assets having maturity period of 1 to 5 years	30,561
OTC derivative assets having maturity period of greater than 5 years	0
OTC derivative assets cross-maturity netting	(13,178)
Total OTC derivative assets, net of cross-maturity netting	160,635
OTC derivative liabilities having maturity period of 0 to 12 months	121,295
OTC derivative liabilities having maturity period of 1 to 5 years	62,607
OTC derivative liabilities having maturity period of greater than 5 years	0
OTC derivative liabilities cross-maturity netting	(13,178)
Total OTC derivative liabilities, net of cross-maturity netting	170,724
Fixed income forwards [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	278
OTC derivative liabilities having maturity period of 1 to 5 years	0
OTC derivative liabilities having maturity period of greater than 5 years	0
OTC derivative liabilities cross-maturity netting	0
Total OTC derivative liabilities, net of cross-maturity netting	278
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	47,927
OTC derivative assets having maturity period of 1 to 5 years	155,590
OTC derivative assets having maturity period of greater than 5 years	95,763
OTC derivative assets cross-maturity netting	(64,051)
Total OTC derivative assets, net of cross-maturity netting	235,229
OTC derivative liabilities having maturity period of 0 to 12 months	45,926
OTC derivative liabilities having maturity period of 1 to 5 years	96,089
OTC derivative liabilities having maturity period of greater than 5 years	120,986
OTC derivative liabilities cross-maturity netting	(64,051)
Total OTC derivative liabilities, net of cross-maturity netting	$ 198,950

Derivative Financial Instrume62

Derivative Financial Instruments - Remaining Contract Maturity of Fair Value of OTC Derivative Assets and Liabilities (Footnote) (Detail) $ in Millions	May. 31, 2015USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Exchange traded derivative assets	$ 94.1
Cash collateral received	190.4
Exchange traded derivative liabilities, with fair value	27.7
Cash collateral pledged	$ 290.1

Derivative Financial Instrume63

Derivative Financial Instruments - Counterparty Credit Quality with Respect to Fair Value of OTC Derivatives Assets (Detail) $ in Thousands	May. 31, 2015USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair value of OTC derivatives assets, Counterparty credit quality, A- or higher	$ 178,941
Fair value of OTC derivatives assets, Counterparty credit quality, BBB- to BBB+	129,161
Fair value of OTC derivatives assets, Counterparty credit quality, BB+ or lower	84,507
Fair value of OTC derivatives assets, Counterparty credit quality, Unrated	105,741
Total OTC derivative assets included in Financial instruments owned	$ 498,350

Derivative Financial Instrume64

Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	May. 31, 2015	Nov. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair value of derivative instruments in a liability position	$ 106.1	$ 269
Collateral posted for derivative instruments in a liability position	97.9	234.6
Additional collateral required for derivative instruments in a liability position	$ 10.8	$ 55.1

Collateralized Transactions - A

Collateralized Transactions - Additional Information (Detail) - USD ($) $ in Thousands	May. 31, 2015	Nov. 30, 2014
Banking and Thrift [Abstract]
Fair value of securities received as collateral	$ 26,700,000	$ 25,800,000
Securities received as collateral	9,623	5,418
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations	$ 2,396,114	$ 3,444,674

Collateralized Transactions - S

Collateralized Transactions - Summary of Repurchase Agreements and Securities Borrowing and Lending Arrangements (Detail) - USD ($) $ in Thousands	May. 31, 2015	Nov. 30, 2014
Banking and Thrift [Abstract]
Securities borrowing arrangements, Gross amounts	$ 7,839,005	$ 6,853,103
Securities borrowing arrangements, Netting in consolidated statement of financial condition	0	0
Securities borrowing arrangements, Net amounts in consolidated statement of financial condition	7,839,005	6,853,103
Securities borrowing arrangements, Additional amounts available for setoff	(545,998)	(680,222)
Securities borrowing arrangements, Available collateral	(921,694)	(1,274,196)
Securities borrowing arrangements, Net amount	6,371,313	4,898,685
Reverse repurchase agreements, Gross amounts	13,695,209	14,059,133
Reverse repurchase agreements, Netting in consolidated statement of financial condition	(9,910,705)	(10,132,275)
Reverse repurchase agreements, Net amounts in consolidated statement of financial condition	3,784,504	3,926,858
Reverse repurchase agreements, Additional amounts available for setoff	(261,671)	(634,568)
Reverse repurchase agreements, Available collateral	(3,492,047)	(3,248,817)
Reverse repurchase agreements, Net amount	30,786	43,473
Securities lending arrangements, Gross amounts	3,694,620	2,598,487
Securities lending arrangements, Netting in consolidated statement of financial condition	0	0
Securities loaned	3,694,620	2,598,487
Securities lending arrangements, Additional amounts available for setoff	(545,998)	(680,222)
Securities lending arrangements, Available collateral	(3,104,520)	(1,883,140)
Securities lending arrangements, Net amount	44,102	35,125
Repurchase agreements, Gross amounts	21,039,148	20,804,432
Repurchase agreements, Netting in consolidated statement of financial condition	(9,910,705)	(10,132,275)
Securities sold under agreements to repurchase	11,128,443	10,672,157
Repurchase agreements, Additional amounts available for setoff	(261,671)	(634,568)
Repurchase agreements, Available collateral	(9,099,025)	(8,810,770)
Repurchase agreements, Net amount	$ 1,767,747	$ 1,226,819

Collateralized Transactions -67

Collateralized Transactions - Summary of Repurchase Agreements and Securities Borrowing and Lending Arrangements (Footnote) (Detail) - USD ($) $ in Millions	May. 31, 2015	Nov. 30, 2014
Banking and Thrift [Abstract]
Securities borrowing arrangements	$ 6,327.5	$ 4,847.4
Securities borrowing arrangements, collateral	6,143.2	4,694
Securities borrowing arrangements, repurchase agreements	1,750.5	1,201.9
Securities borrowing arrangements, pledged securities collateral	$ 1,802.5	$ 1,238.4

Securitization Activities - Act

Securitization Activities - Activity Related to Securitizations Accounted for as Sales (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Transfers and Servicing [Abstract]
Transferred assets	$ 1,490.6	$ 1,599.7	$ 3,053.5	$ 3,226.6
Proceeds on new securitizations	1,527.1	1,600.1	3,091.6	3,228.2
Cash flows received on retained interests	$ 12.2	$ 20.4	$ 19	$ 28.9

Securitization Activities - Sum

Securitization Activities - Summary of Retained Interests in SPEs (Detail) - USD ($) $ in Millions	May. 31, 2015	Nov. 30, 2014
Securitization Vehicles [Line Items]
Total RMBS securitization assets	$ 10,986.6	$ 19,196.9
Total CMBS securitization assets	3,022.9	5,848.5
Total Collateralized loan obligations	4,677.1	4,511.8
U.S. government agency residential mortgage-backed securities [Member]
Securitization Vehicles [Line Items]
Fair Value of Securitizations Initially Retained	139.5	226.9
U.S. government agency commercial mortgage-backed securities [Member]
Securitization Vehicles [Line Items]
Fair Value of Securitizations Initially Retained	85.8	204.7
Collateralized loan obligations [Member]
Securitization Vehicles [Line Items]
Fair Value of Securitizations Initially Retained	$ 61.6	$ 108.4

Securitization Activities - Add

Securitization Activities - Additional Information (Detail) - USD ($) $ in Millions	May. 31, 2015	Nov. 30, 2014
Transfers and Servicing [Abstract]
Carrying value of assets	$ 3.9	$ 7.8
Carrying value of liabilities	$ 3.9	$ 7.8

Variable Interest Entities - As

Variable Interest Entities - Assets and Liabilities of Consolidated VIEs Prior to Consolidation (Detail) - USD ($) $ in Millions	May. 31, 2015	Nov. 30, 2014
Securitization Vehicles [Member]
Variable Interest Entity [Line Items]
Assets	$ 709.1	$ 638.3
Liabilities	709.1	638.3
Other [Member]
Variable Interest Entity [Line Items]
Assets	0.5	0.5
Liabilities	0.2	0.2
Cash [Member] | Securitization Vehicles [Member]
Variable Interest Entity [Line Items]
Assets	0	0
Cash [Member] | Other [Member]
Variable Interest Entity [Line Items]
Assets	0.2	0.2
Financial Instruments Owned [Member] | Securitization Vehicles [Member]
Variable Interest Entity [Line Items]
Assets	54.7	62.7
Financial Instruments Owned [Member] | Other [Member]
Variable Interest Entity [Line Items]
Assets	0.3	0.3
Securities Purchased Under Agreement to Resell [Member] | Securitization Vehicles [Member]
Variable Interest Entity [Line Items]
Assets	654.1	575.2
Securities Purchased Under Agreement to Resell [Member] | Other [Member]
Variable Interest Entity [Line Items]
Assets	0	0
Fees, Interest and Other Receivables [Member] | Securitization Vehicles [Member]
Variable Interest Entity [Line Items]
Assets	0.3	0.4
Fees, Interest and Other Receivables [Member] | Other [Member]
Variable Interest Entity [Line Items]
Assets	0	0
Other Secured Financings [Member] | Securitization Vehicles [Member]
Variable Interest Entity [Line Items]
Liabilities	708.2	637.7
Other Secured Financings [Member] | Other [Member]
Variable Interest Entity [Line Items]
Liabilities	0	0
Other Liabilities [Member] | Securitization Vehicles [Member]
Variable Interest Entity [Line Items]
Liabilities	0.9	0.6
Other Liabilities [Member] | Other [Member]
Variable Interest Entity [Line Items]
Liabilities	$ 0.2	$ 0.2

Variable Interest Entities - 72

Variable Interest Entities - Assets and Liabilities of Consolidated VIEs Prior to Consolidation (Footnote) (Detail) - USD ($) $ in Millions	May. 31, 2015	Nov. 30, 2014
Securitization Vehicles [Member]
Variable Interest Entity [Line Items]
Secured financing included in inventory and eliminated	$ 2.6	$ 39.7

Variable Interest Entities - Va

Variable Interest Entities - Variable Interests in Non-Consolidated Variable Interest Entities (Detail) - Variable Interest Entity Not Primary Beneficiary [Member] - USD ($) $ in Millions	May. 31, 2015	Nov. 30, 2014
Variable Interest Entity [Line Items]
Carrying Amount, Assets	$ 286.8	$ 360.2
Carrying Amount, Liabilities	0	0
Maximum exposure to loss in non-consolidated VIEs	1,545.9	1,795.2
Size of the variable interest entity measured by total assets	6,389.8	8,747.4
Collateralized loan obligations [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets	84.6	134
Carrying Amount, Liabilities	0	0
Maximum exposure to loss in non-consolidated VIEs	373.9	926.9
Size of the variable interest entity measured by total assets	5,659.6	7,737.1
Consumer Loan Vehicles [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets	171	170.6
Carrying Amount, Liabilities	0	0
Maximum exposure to loss in non-consolidated VIEs	1,116.2	797.8
Size of the variable interest entity measured by total assets	609.2	485.2
Asset management vehicle [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets	6.9	11.3
Carrying Amount, Liabilities	0	0
Maximum exposure to loss in non-consolidated VIEs	6.9	11.3
Size of the variable interest entity measured by total assets	49	432.3
Private equity vehicles [Member]
Variable Interest Entity [Line Items]
Carrying Amount, Assets	24.3	44.3
Carrying Amount, Liabilities	0	0
Maximum exposure to loss in non-consolidated VIEs	48.9	59.2
Size of the variable interest entity measured by total assets	$ 72	$ 92.8

Variable Interest Entities - No

Variable Interest Entities - Non-consolidated VIEs - Additional Information (Detail) - USD ($)	May. 31, 2015	Nov. 30, 2014	Jul. 26, 2010
Variable Interest Entity [Line Items]
Maximum exposure	$ 371,600,000
Agency mortgage-backed securities [Member]
Variable Interest Entity [Line Items]
Carrying amount	3,098,700,000	$ 3,186,900,000
Non agency mortgage-backed securities [Member]
Variable Interest Entity [Line Items]
Carrying amount	983,700,000	1,120,000,000
Jefferies Employee Partners IV, LLC [Member]
Variable Interest Entity [Line Items]
Carrying amount of equity investment	1,100,000	1,200,000
Jefferies Energy Partners I LP [Member]
Variable Interest Entity [Line Items]
Carrying amount	0
Maximum exposure	10,000,000
USA Fund [Member]
Variable Interest Entity [Line Items]
Equity investment in Jefferies SBI USA Fund L.P. (the USA Fund)			$ 75,000,000
Funded equity commitments	60,400,000	60,100,000
Carrying amount of equity investment	$ 23,200,000	$ 43,100,000

Investments - Narrative (Detail

Investments - Narrative (Details)	May. 31, 2015
Jefferies Capital Partners V L.P [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	11.00%
SBI USA Fund L.P. [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%

Investments - Jefferies Finance

Investments - Jefferies Finance - Narrative (Detail) - USD ($)	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014	Nov. 30, 2014
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	486,500,000		486,500,000
Unfunded portion of equity commitment to subsidiary	113,500,000		$ 113,500,000
Extension period			1 year
Termination notice period			60 days
Committed line of credit facility amount	1,000,000,000		$ 1,000,000,000
Maturity date			Mar. 1, 2016
Funded portion of loan commitment	0		$ 0		$ 0
Loan commitment	350,000,000		350,000,000
Interest income	59,000	$ 600,000	500,000	$ 1,100,000
Unfunded commitment fees	400,000	400,000	800,000	1,100,000
Net underwriting fees paid by JFIN related to originations of loans by JFIN	39,900,000	38,800,000	55,500,000	86,400,000
Fees paid to JFIN related to origination of loans by JFIN	900,000	3,400,000	1,600,000	7,700,000
Placement fees	404,262,000	331,149,000	676,257,000	745,469,000
Revenue in Connection of Execution of JFIN CLO	173,508,000	167,378,000	340,430,000	329,441,000
Underwriting fees	1,300,000	4,200,000
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	41,200,000	29,300,000	62,300,000	58,500,000
Placement fees	3,100,000		3,100,000
Revenue in Connection of Execution of JFIN CLO		1,800,000		2,200,000
Administrative services provided	7,100,000	$ 7,000,000	34,900,000	$ 28,700,000
Receivables under service agreement	$ 57,100,000		$ 57,100,000		$ 41,500,000

Investments - Summary of Select

Investments - Summary of Selected Financial Information for Jefferies Finance (Detail) - Jefferies Finance, LLC [Member] - USD ($) $ in Millions	May. 31, 2015	Nov. 30, 2014
Schedule of Equity Method Investments [Line Items]
Total assets	$ 6,853.1	$ 5,954
Total liabilities	5,879.5	4,961.7
Total equity	973.6	992.3
Our total equity balance	$ 486.8	$ 496

Investments - Jefferies LoanCor

Investments - Jefferies LoanCore - Narrative (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014	Nov. 30, 2014	Feb. 23, 2011
Guarantee Obligations [Line Items]
Equity commitment	$ 600		$ 600
Jefferies LoanCore, LLC [Member]
Guarantee Obligations [Line Items]
Aggregate commitment						$ 600
Funded portion of equity commitment to subsidiary			125.6		$ 200.9
Equity commitment	$ 291		$ 291
Percentage of the Variable Interest Entity's (VIE) voting interest	48.50%		48.50%
Net earnings from equity method investment	$ 16.8	$ 6.8	$ 36.8	$ 11.8
Placement fees earned	$ 0.2	$ 0.3	$ 0.6	$ 0.6

Investments - Summary of Sele79

Investments - Summary of Selected Financial Information for Jefferies LoanCore (Detail) - Jefferies LoanCore, LLC [Member] - USD ($) $ in Millions	May. 31, 2015	Nov. 30, 2014
Schedule of Equity Method Investments [Line Items]
Total assets	$ 1,887.2	$ 1,500.9
Total liabilities	1,386.6	962.7
Total equity	500.6	538.2
Our total equity balance	$ 242.8	$ 261

Investments - JCP Funds - Narra

Investments - JCP Funds - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014	Nov. 30, 2014
Schedule of Equity Method Investments [Line Items]
Unfunded portion of equity commitment to subsidiary	$ 113.5		$ 113.5
Total committed equity capitalization	1,200		1,200
JCP Funds [Member]
Schedule of Equity Method Investments [Line Items]
Investment	26.3		26.3		$ 48.9
Revenue from investment	0.6	$ 6.6	22.9	$ 8
Unfunded portion of equity commitment to subsidiary	16.6		16.6
Total committed equity capitalization	$ 85		$ 85		$ 85
Percent of financial information presented			100.00%
Ownership percentage	35.20%		35.20%

Investments - Summary of Sele81

Investments - Summary of Selected Financial Information for JCP Funds (Details) - JCP Funds [Member] - USD ($) $ in Thousands	3 Months Ended
	May. 31, 2015	Dec. 31, 2014	May. 31, 2014	Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]
Total assets	$ 74,759	$ 73,261
Total liabilities	86	66
Total partners' capital	74,673	73,195
Net increase (decrease) in net assets resulting from operations	$ 1,478	$ (65,700)	$ (18,779)	$ (2,947)

Goodwill and Other Intangible82

Goodwill and Other Intangible Assets - Schedule of Goodwill Resulting from Leucadia Transaction Attributable to Reportable Segments (Detail) $ in Thousands	6 Months Ended
	May. 31, 2015USD ($)
Goodwill [Roll Forward]
Total goodwill	$ 1,662,636
Add: Translation adjustments	(2,443)
Total goodwill	1,660,193
Capital Markets [Member]
Goodwill [Roll Forward]
Total goodwill	1,659,636
Total goodwill	1,657,193
Asset Management [Member]
Goodwill [Roll Forward]
Total goodwill	3,000
Total goodwill	$ 3,000

Goodwill and Other Intangible83

Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	May. 31, 2015	Nov. 30, 2014
Finite And Infinite Lived Intangible Assets [Line Items]
Total gross costs - intangible assets	$ 273,979	$ 274,860
Accumulated amortization - finite lived intangible assets	(39,073)	(33,079)
Total net carrying amount - intangible assets	234,906	241,781
Customer relationships [Member]
Finite And Infinite Lived Intangible Assets [Line Items]
Gross costs - finite lived intangible assets	127,944	128,323
Accumulated amortization - finite lived intangible assets	(30,614)	(26,402)
Net carrying amount - finite lived intangible assets	$ 97,330	$ 101,921
Weighted average remaining lives (years)	13 years 3 months 24 days	13 years 8 months 12 days
Trade name [Member]
Finite And Infinite Lived Intangible Assets [Line Items]
Gross costs - finite lived intangible assets	$ 131,587	$ 132,009
Accumulated amortization - finite lived intangible assets	(8,459)	(6,677)
Net carrying amount - finite lived intangible assets	$ 123,128	$ 125,332
Weighted average remaining lives (years)	32 years 9 months 13 days	33 years 3 months 18 days
Exchange and clearing organization membership interests and registrations [Member]
Finite And Infinite Lived Intangible Assets [Line Items]
Gross costs - indefinite lived intangible assets	$ 14,448	$ 14,528
Accumulated amortization - finite lived intangible assets	0	0
Net carrying amount - indefinite lived intangible assets	$ 14,448	$ 14,528

Goodwill and Other Intangible84

Goodwill and Other Intangible Assets - Future Amortization Expense Related to Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Aggregate amortization expense	$ 3,000	$ 3,200	$ 6,100	$ 6,400
Remainder of fiscal 2015	6,099		6,099
Year ended November 30, 2016	12,198		12,198
Year ended November 30, 2017	12,198		12,198
Year ended November 30, 2018	12,198		12,198
Year ended November 30, 2019	$ 12,198		$ 12,198

Short-Term Borrowings (Detail)

Short-Term Borrowings (Detail) - USD ($)	Apr. 23, 2015	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014	Nov. 30, 2014	Aug. 26, 2011
Short-term Debt [Line Items]
Short-term borrowings		$ 362,000,000		$ 362,000,000		$ 12,000,000
Interest rate on short-term borrowings outstanding		2.03%		2.03%
Average daily short-term borrowings		$ 77,000,000	$ 181,300,000	$ 58,200,000	$ 97,600,000
Revolving credit facility							$ 950,000,000
Line of Credit [Member] | Intraday Credit Facility [Member]
Short-term Debt [Line Items]
Revolving credit facility	$ 500,000,000
Debt term	6 months
Extension term	6 months
Line of Credit [Member] | Intraday Credit Facility [Member] | Prime Rate [Member]
Short-term Debt [Line Items]
Basis spread on variable rate	0.50%

Long-Term Debt - Summary of Lon

Long-Term Debt - Summary of Long-Term Debt Carrying Values Including Unamortized Discounts and Premiums (Detail) - USD ($) $ in Thousands	May. 31, 2015	Nov. 30, 2014
Debt Instrument [Line Items]
Long-term debt	$ 6,401,934	$ 6,483,617
Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	6,201,934	6,313,617
Secured debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 200,000	170,000
3.875% Senior Note, due 2015 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.875%
Effective interest rate	2.17%
3.875% Senior Note, due 2015 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 503,746	507,944
5.5% Senior Notes, due 2016 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.50%
Effective interest rate	2.52%
5.5% Senior Notes, due 2016 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 358,159	363,229
5.125% Senior Notes, due 2018 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.125%
Effective interest rate	3.46%
5.125% Senior Notes, due 2018 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 836,381	842,359
8.5% Senior Notes, due 2019 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	8.50%
Effective interest rate	4.00%
8.5% Senior Notes, due 2019 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 819,594	832,797
2.375% Euro Medium Term Notes, due 2020 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.375%
Effective interest rate	2.42%
2.375% Euro Medium Term Notes, due 2020 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 548,005	620,725
6.875% Senior Note, due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.875%
Effective interest rate	4.40%
6.875% Senior Note, due 2021 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 846,007	853,091
2.25% Euro Medium Term Notes, due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.25%
Effective interest rate	4.08%
2.25% Euro Medium Term Notes, due 2022 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 3,895	4,379
5.125% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.125%
Effective interest rate	4.55%
5.125% Senior Notes, due 2023 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 622,114	623,311
6.45% Senior Debentures, due 2027 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.45%
Effective interest rate	5.46%
6.45% Senior Debentures, due 2027 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 380,626	381,515
3.875% Convertible Senior Debentures due 2029 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.875%
Effective interest rate	3.50%
3.875% Convertible Senior Debentures due 2029 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 348,706	349,261
6.25% Senior Debentures, due 2036 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.25%
Effective interest rate	6.03%
6.25% Senior Debentures, due 2036 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 512,891	513,046
6.50% Senior Notes, due 2043 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.50%
Effective interest rate	6.09%
6.50% Senior Notes, due 2043 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 421,810	$ 421,960

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail)	Jun. 11, 2015USD ($)$ / shares	Apr. 09, 2015USD ($)	Jun. 26, 2014USD ($)	May. 31, 2014USD ($)	May. 31, 2015USD ($)Trading_day	May. 31, 2014USD ($)	Nov. 30, 2014USD ($)	Aug. 26, 2011USD ($)
Debt Instrument [Line Items]
Revolving credit facility								$ 950,000,000
Borrowed unsecured credit facility-JBL								$ 250,000,000
Amended and restated credit facility period			3 years
Line of credit reduced borrowing capacity		$ 750,000,000	$ 750,000,000
Leucadia [Member] | Subsequent event [Member]
Debt Instrument [Line Items]
Debenture principal amount	$ 1,000
Debt instrument convertible conversion ratio	22.3089
Conversion price of common stock (dollars per share) | $ / shares	$ 44.83
3.875% Convertible Senior Debentures due 2029 [Member]
Debt Instrument [Line Items]
Senior long-term debt, interest rate					3.875%
Convertible Senior debentures includes fair value					$ 700,000		$ 700,000
Consolidated Statement of Earnings gain (loss) amount				$ 3,700,000		$ 5,700,000
Issuance of senior unsecured long-term debt					$ 345,000,000
3.875% Convertible Senior Debentures due 2029 [Member] | Leucadia [Member]
Debt Instrument [Line Items]
Senior long-term debt, interest rate					3.875%
Debt instrument convertible conversion ratio (greater than)					130.00%
Earliest period of conversion price | Trading_day					20
Latest period of conversion price					30 days
Less than trading price per debenture related to common stock					95.00%
Consecutive trading days					10 days
Contingent interest					0.375%
Threshold trading days					5 days
Interest period					6 months
Trading price of contingent interest					$ 1,200

Noncontrolling Interests (Detai

Noncontrolling Interests (Detail) - USD ($) $ in Thousands	May. 31, 2015	Nov. 30, 2014
Noncontrolling Interest [Line Items]
Noncontrolling interests	$ 40,068	$ 38,848
Global Equity Event Opportunity Fund LLC [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests	34,245	33,303
Other [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests	5,823	5,545
Leucadia [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interests	$ 26,100	$ 25,400

Benefit Plans - Additional Info

Benefit Plans - Additional Information (Detail) - USD ($)	6 Months Ended
	May. 31, 2015	Nov. 30, 2014
U.S Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions made to pension plan	$ 0
Contributions expected to be made to pension plan	0
German Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Investment in insurance contract	15,500,000	$ 18,100,000
Contributions made to pension plan	0
Contributions expected to be made to pension plan	$ 0

Benefit Plans - Components of N

Benefit Plans - Components of Net Periodic Pension (Benefit) Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
U.S Pension Plan [Member]
Components of net periodic pension (income) cost:
Service cost	$ 63	$ 56	$ 126	$ 112
Interest cost on projected benefit obligation	585	607	1,170	1,214
Expected return on plan assets	(848)	(789)	(1,696)	(1,578)
Net amortization	0	(36)	0	(72)
Net periodic pension income	(200)	(162)	(400)	(324)
German Pension Plan [Member]
Components of net periodic pension (income) cost:
Service cost	0	11	0	22
Interest cost on projected benefit obligation	127	221	263	442
Net amortization	79	63	163	125
Net periodic pension income	$ 206	$ 295	$ 426	$ 589

Compensation Plans - Compensati

Compensation Plans - Compensation Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Profit sharing plan	$ 1.4	$ 1.4	$ 4.7	$ 4.8
Total compensation cost	64.1	54.5	148.2	133
Restricted Cash Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted cash awards	48.2	35	103.5	78.2
Restricted Stock and RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock and RSUs	$ 14.5	$ 18.1	$ 40	$ 50

Compensation Plans - Remaining

Compensation Plans - Remaining Unamortized Amounts (Details) - May. 31, 2015 - USD ($) $ in Millions	Total
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining Unamortized Amounts	$ 370
Nonvested Share-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining Unamortized Amounts	$ 56
Weighted Average Vesting Period (in Years)	1 year 9 months 18 days
Restricted Cash Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining Unamortized Amounts	$ 314
Weighted Average Vesting Period (in Years)	3 years

Compensation Plans - Additional

Compensation Plans - Additional Information (Detail) - 6 months ended May. 31, 2015 - USD ($)	Total
Compensation Related Costs [Abstract]
Vesting period	4 years
Number of years in which restricted stock awards amortized as compensation expense	4 years
Annual employee contributions	$ 21,250
Employee service share based compensation plan stock price	95.00%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	May. 31, 2015	Nov. 30, 2014
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 112,300,000	$ 126,700,000
Unrecognized tax benefits that would impact effective tax rate in future	74,700,000	84,500,000
Accrued interest on unrecognized tax benefits	31,700,000	30,600,000
Accrued material penalties	$ 0	$ 0

Income Taxes - Earliest Tax Yea

Income Taxes - Earliest Tax Year Subject to Examination in the Major Tax Jurisdictions in which the Company Operates (Detail)	6 Months Ended
	May. 31, 2015
United States [Member]
Income Tax Examination [Line Items]
Tax Year	2,006
California [Member]
Income Tax Examination [Line Items]
Tax Year	2,006
New Jersey [Member]
Income Tax Examination [Line Items]
Tax Year	2,007
New York State [Member]
Income Tax Examination [Line Items]
Tax Year	2,001
New York City [Member]
Income Tax Examination [Line Items]
Tax Year	2,003
United Kingdom [Member]
Income Tax Examination [Line Items]
Tax Year	2,013

Commitments, Contingencies an96

Commitments, Contingencies and Guarantees - Commitments and Contingencies (Detail) $ in Millions	May. 31, 2015USD ($)
Commitments And Guarantee Obligations [Line Items]
2,015	$ 3,395.5
2,016	1,815.5
2017 and 2018	887.4
2019 and 2020	66.1
2021 and Later	295.2
Notional/ Maximum Payout	6,459.7
Equity commitments [Member]
Commitments And Guarantee Obligations [Line Items]
2,015	0
2,016	9.2
2017 and 2018	0.9
2019 and 2020	0
2021 and Later	257.7
Notional/ Maximum Payout	267.8
Loan commitments [Member]
Commitments And Guarantee Obligations [Line Items]
2,015	34.3
2,016	475.7
2017 and 2018	387.4
2019 and 2020	60.1
2021 and Later	0
Notional/ Maximum Payout	957.5
Mortgage-related and other purchase commitments [Member]
Commitments And Guarantee Obligations [Line Items]
2,015	909.9
2,016	1,330.6
2017 and 2018	499.1
2019 and 2020	0
2021 and Later	0
Notional/ Maximum Payout	2,739.6
Underwriting commitments [Member]
Commitments And Guarantee Obligations [Line Items]
2,015	36.9
2,016	0
2017 and 2018	0
2019 and 2020	0
2021 and Later	0
Notional/ Maximum Payout	36.9
Forward starting reverse repos and repos [Member]
Commitments And Guarantee Obligations [Line Items]
2,015	2,384.4
2,016	0
2017 and 2018	0
2019 and 2020	0
2021 and Later	0
Notional/ Maximum Payout	2,384.4
Other unfunded commitments [Member]
Commitments And Guarantee Obligations [Line Items]
2,015	30
2,016	0
2017 and 2018	0
2019 and 2020	6
2021 and Later	37.5
Notional/ Maximum Payout	$ 73.5

Commitments, Contingencies an97

Commitments, Contingencies and Guarantees - Credit Exposure from Loan Commitments (Detail) $ in Millions	May. 31, 2015USD ($)
Commitments And Guarantee Obligations [Line Items]
2,015	$ 115
2016-2020	1,036.5
2021 and Later	0
Total Corporate Lending Exposure	1,151.5
Corporate Lending Exposure at Fair Value	194
Corporate Lending Commitments	957.5
Non-investment grade [Member]
Commitments And Guarantee Obligations [Line Items]
2,015	0
2016-2020	171.9
2021 and Later	0
Total Corporate Lending Exposure	171.9
Corporate Lending Exposure at Fair Value	9.7
Corporate Lending Commitments	162.2
Unrated [Member]
Commitments And Guarantee Obligations [Line Items]
2,015	115
2016-2020	864.6
2021 and Later	0
Total Corporate Lending Exposure	979.6
Corporate Lending Exposure at Fair Value	184.3
Corporate Lending Commitments	$ 795.3

Commitments, Contingencies an98

Commitments, Contingencies and Guarantees - Credit Exposure from Loan Commitments (Footnote) (Detail)	May. 31, 2015USD ($)
Commitments and Contingencies Disclosure [Abstract]
Loan guarantee	$ 0
Corporate lending exposure included in financial instruments owned	215,300,000
Corporate lending exposure carried at fair value included in financial instruments sold	$ 21,300,000

Commitments, Contingencies an99

Commitments, Contingencies and Guarantees - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended
	Jan. 31, 2013	May. 31, 2015
Commitments Contingencies And Guarantees [Line Items]
Loan commitments outstanding to clients		$ 607.5
Fair value of mortgage-related commitments		135.7
Litigation settlement amount	$ 25
Litigation reserve		0.7
Fair value of derivative contracts approximated deemed to meet the definition of a guarantee		371.6
Maximum amount payable under guarantee		29.1
Standby Letters of Credit [Member]
Commitments Contingencies And Guarantees [Line Items]
Letters of credit commitments		37.3
Jefferies Capital Partners LLC [Member]
Commitments Contingencies And Guarantees [Line Items]
Outstanding equity commitments		30.2
Other Investments [Member]
Commitments Contingencies And Guarantees [Line Items]
Outstanding equity commitments		$ 4.4

Commitments, Contingencies a100

Commitments, Contingencies and Guarantees - Guarantees (Detail) $ in Millions	May. 31, 2015USD ($)
Guarantee Obligations [Line Items]
Notional/ Maximum Payout	$ 6,459.7
Derivative contracts - non-credit related [Member]
Guarantee Obligations [Line Items]
2,015	28,156.7
2,016	3,319.6
2017 and 2018	614.6
2019 and 2020	644.4
2021 and Later	430.6
Notional/ Maximum Payout	33,165.9
Written derivative contracts - credit related [Member]
Guarantee Obligations [Line Items]
2,015	2
2,016	0
2017 and 2018	0
2019 and 2020	1,436.3
2021 and Later	20
Notional/ Maximum Payout	1,458.3
Derivatives [Member]
Guarantee Obligations [Line Items]
2,015	28,158.7
2,016	3,319.6
2017 and 2018	614.6
2019 and 2020	2,080.7
2021 and Later	450.6
Notional/ Maximum Payout	$ 34,624.2

Commitments, Contingencies a101

Commitments, Contingencies and Guarantees - External Credit Ratings of Underlying or Referenced Assets for Credit Related Derivatives Contracts (Detail) $ in Millions	May. 31, 2015USD ($)
Index credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	$ 1,324.3
Single name credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	134
AAA/Aaa [Member] | Index credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	1,324.3
AAA/Aaa [Member] | Single name credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	0
AA/Aa [Member] | Index credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	0
AA/Aa [Member] | Single name credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	0
A [Member] | Index credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	0
A [Member] | Single name credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	22
BBB/Baa [Member] | Index credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	0
BBB/Baa [Member] | Single name credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	24
Below Investment Grade [Member] | Index credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	0
Below Investment Grade [Member] | Single name credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	88
Unrated [Member] | Index credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	0
Unrated [Member] | Single name credit default swaps [Member]
Commitments And Guarantee Obligations [Line Items]
External credit ratings	$ 0

Net Capital Requirements - Net

Net Capital Requirements - Net Capital, Adjusted and Excess Net Capital (Detail) $ in Thousands	May. 31, 2015USD ($)
Jefferies [Member]
Net Capital Requirements [Line Items]
Net Capital	$ 998,320
Excess Net Capital	913,625
Jefferies Execution [Member]
Net Capital Requirements [Line Items]
Net Capital	7,800
Excess Net Capital	$ 7,550

Segment Reporting - Additional

Segment Reporting - Additional Information (Detail)	6 Months Ended
	May. 31, 2015segment
Segment Reporting [Abstract]
Number of operating segments	2

Segment Reporting - Net Revenue

Segment Reporting - Net Revenues, Expenses and Total Assets by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014	Nov. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 791,554	$ 722,992	$ 1,383,226	$ 1,622,020
Expenses	706,842	623,855	1,285,630	1,340,614
Segment assets	44,141,835		44,141,835		$ 44,517,648
Capital Markets [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	789,100	717,800	1,351,500	1,594,700
Expenses	692,400	617,100	1,264,700	1,322,800
Segment assets	43,465,300		43,465,300		44,002,600
Asset Management [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	2,500	5,200	31,700	27,300
Expenses	14,400	$ 6,700	20,900	$ 17,800
Segment assets	$ 676,500		$ 676,500		$ 515,000

Segment Reporting - Net Reve105

Segment Reporting - Net Revenues by Geographic Region (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Revenues:
Net revenues	$ 791,554	$ 722,992	$ 1,383,226	$ 1,622,020
Americas [Member]
Revenues:
Net revenues	616,857	538,930	1,053,643	1,231,985
Europe [Member]
Revenues:
Net revenues	148,998	159,983	288,204	346,774
Asia [Member]
Revenues:
Net revenues	$ 25,699	$ 24,079	$ 41,379	$ 43,261

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014	Nov. 30, 2014	Mar. 18, 2015
Related Party Transaction [Line Items]
Purchase commitments from Berkadia Commercial Mortgage, LLC			$ 336,500		$ 344,800
Commissions for conducting brokerage services	$ 173,508	$ 167,378	340,430	$ 329,441
Loans outstanding to certain employees	24,300		24,300		20,100
Noncontrolling interests	40,068		40,068		38,848
Leucadia [Member]
Related Party Transaction [Line Items]
Noncontrolling interests	26,100		26,100		25,400
Private Equity Related Funds [Member]
Related Party Transaction [Line Items]
Equity investments loans in related funds	36,700		36,700		60,700
Leucadia [Member]
Related Party Transaction [Line Items]
Revenue from related parties	6,100	$ 9,200	11,200	$ 17,200
Due to related party	7,300		7,300		41,500
Due from related party	3,000		3,000		10,900
National Beef Packaging Company, LLC [Member]
Related Party Transaction [Line Items]
Due to related party	0		0		4,100
Commissions for conducting brokerage services	0		200
Harbinger Group Inc [Member]
Related Party Transaction [Line Items]
Unsettled purchases and sales of loans	266,600		266,600		$ 232,000
Number of shares sold of investment						18.6
Investment Banking [Member] | Harbinger Group Inc [Member]
Related Party Transaction [Line Items]
Revenue from related parties	$ 900		$ 1,300

Related Party Transactions - Su

Related Party Transactions - Summary of Interest Income, Other Revenues and Investment Income to Private Equity Related Funds (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Private Equity Related Funds [Member]
Related Party Transaction [Line Items]
Other revenues and investment income (loss)	$ 947	$ (9,036)	$ (24,212)	$ (11,459)

Related Party Transactions - Re

Related Party Transactions - Revenue by Service (Details) - Leucadia [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Related Party Transaction [Line Items]
Revenue from related parties	$ 6,100	$ 9,200	$ 11,200	$ 17,200
Investment banking and advisory [Member]
Related Party Transaction [Line Items]
Revenue from related parties	200		21,200
Asset management [Member]
Related Party Transaction [Line Items]
Revenue from related parties	119		303
Commissions [Member]
Related Party Transaction [Line Items]
Revenue from related parties	$ 1		$ 37

Exit Costs - Narrative (Details

Exit Costs - Narrative (Details) - USD ($) $ in Millions	Apr. 09, 2015	Jun. 26, 2014	May. 31, 2015
Restructuring and Related Activities [Abstract]
Percent of accounts transfered			50.00%
Line of credit reduced borrowing capacity	$ 750	$ 750
Unamortized deferred origination costs			$ 2.2
Non-cash restructuring costs			10.8
Expected costs			$ 48.6

Exit Costs - Restructuring and

Exit Costs - Restructuring and Impairment Costs (Details) $ in Thousands	3 Months Ended
	May. 31, 2015USD ($)
Restructuring Cost and Reserve [Line Items]
Impairment costs	$ 28,570
Compensation and Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	20,019
Technology and Communications [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	6,260
Professional Services [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	2,033
Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	258
Severance Costs [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	15,559
Accelerated Amortization of Restricted Stock and Restricted Cash Awards [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	4,460
Accelerated Amortization of Capitalized Software [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	6,260
Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	$ 2,291

Exit Costs - Restructuring Rese

Exit Costs - Restructuring Reserve (Details) $ in Thousands	3 Months Ended
	May. 31, 2015USD ($)
Restructuring Reserve [Roll Forward]
Expenses	$ 28,570
Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Balance at February 28, 2015	0
Expenses	15,559
Payments	(2,523)
Liability at May 31, 2015	13,036
Other Costs [Member]
Restructuring Reserve [Roll Forward]
Balance at February 28, 2015	0
Expenses	2,291
Payments	(1,518)
Liability at May 31, 2015	773
Restructuring Costs [Member]
Restructuring Reserve [Roll Forward]
Balance at February 28, 2015	0
Expenses	17,850
Payments	(4,041)
Liability at May 31, 2015	13,809
Accelerated Amortization of Restricted Stock and Restricted Cash Awards [Member]
Restructuring Reserve [Roll Forward]
Expenses	4,460
Accelerated Amortization of Capitalized Software [Member]
Restructuring Reserve [Roll Forward]
Expenses	$ 6,260

Uncategorized Items - jef-20150

Label	Element	Value
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	$ 60,182
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	$ 61,814