Organization and Basis of Presentation	9 Months Ended
Aug. 31, 2016
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 Hong Kong Limited, Jefferies Financial Services, Inc., Jefferies Funding LLC, Jefferies Financial Products, LLC, Jefferies Leveraged Credit Products, LLC and all other entities in which we have a controlling financial interest or are the primary beneficiary. On April 9, 2015, we entered into an agreement to transfer certain of the client activities of our Futures business to Société Générale S.A. and initiated a plan to substantially exit the remaining aspects of our futures business. During the second quarter of 2016, we completed the exit of the futures business. 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, 2015. 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 that we control by ownership a majority of the outstanding voting stock. In addition, we consolidate entities that 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 is presented as Net earnings to noncontrolling interests in the Consolidated Statements of Earnings. In situations in which we have significant influence, but not control, of an entity that does not qualify as a VIE, we apply either the equity method of accounting or fair value accounting pursuant to the fair value option election under U.S. GAAP, with our portion of net earnings or gains and losses recorded within Other revenues or Principal transaction revenues, respectively. We also have formed nonconsolidated investment vehicles with third-party investors that are typically organized as partnerships or limited liability companies and are carried at fair value. We act as general partner or managing member for these investment vehicles and have generally provided the third-party investors with termination or “kick-out” rights. Intercompany accounts and transactions are eliminated in consolidation. Immaterial Adjustments We made immaterial correcting adjustments (referred to as “adjustments”) to our Consolidated Statement of Cash Flows for the nine months ended August 31, 2015. The adjustments had the impact of decreasing the Net change in accrued expenses and other liabilities by $24.5 million ($204.5 million as originally reported and $228.9 million as revised), increasing the Net change in bank overdrafts by $24.5 million ($0.0 as originally reported and $24.5 million as revised), decreasing the Net cash used in operating activities by $24.5 million ($608.7 million as originally reported and $633.1 million as revised) and increasing the Net cash provided by financing activities by $24.5 million ($31.2 million as originally reported and $55.7 million as revised) on the Consolidated Statements of Cash Flows for the nine months ended August 31, 2015. The adjustments relate to a classification error in the reporting of net change in bank overdrafts within our Consolidated Statements of Cash Flows. The adjustments have no effect on our Consolidated Statements of Financial Condition, the Consolidated Statements of Earnings, the Consolidated Statements of Changes in Equity or the Consolidated Statements of Comprehensive Income for the nine months ended August 31, 2015. We do not believe these adjustments are material to our financial statements for any previously reported period.

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 Hong Kong Limited, Jefferies Financial Services, Inc., Jefferies Funding LLC, Jefferies Financial Products, LLC, Jefferies Leveraged Credit Products, LLC and all other entities in which we have a controlling financial interest or are the primary beneficiary. On April 9, 2015, we entered into an agreement to transfer certain of the client activities of our Futures business to Société Générale S.A. and initiated a plan to substantially exit the remaining aspects of our futures business. During the second quarter of 2016, we completed the exit of the futures business. 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, 2015.

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 that we control by ownership a majority of the outstanding voting stock. In addition, we consolidate entities that 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 is presented as Net earnings to noncontrolling interests in the Consolidated Statements of Earnings.

In situations in which we have significant influence, but not control, of an entity that does not qualify as a VIE, we apply either the equity method of accounting or fair value accounting pursuant to the fair value option election under U.S. GAAP, with our portion of net earnings or gains and losses recorded within Other revenues or Principal transaction revenues, respectively. We also have formed nonconsolidated investment vehicles with third-party investors that are typically organized as partnerships or limited liability companies and are carried at fair value. We act as general partner or managing member for these investment vehicles and have generally provided the third-party investors with termination or “kick-out” rights.

Intercompany accounts and transactions are eliminated in consolidation.

Immaterial Adjustments

We made immaterial correcting adjustments (referred to as “adjustments”) to our Consolidated Statement of Cash Flows for the nine months ended August 31, 2015. The adjustments had the impact of decreasing the Net change in accrued expenses and other liabilities by $24.5 million ($204.5 million as originally reported and $228.9 million as revised), increasing the Net change in bank overdrafts by $24.5 million ($0.0 as originally reported and $24.5 million as revised), decreasing the Net cash used in operating activities by $24.5 million ($608.7 million as originally reported and $633.1 million as revised) and increasing the Net cash provided by financing activities by $24.5 million ($31.2 million as originally reported and $55.7 million as revised) on the Consolidated Statements of Cash Flows for the nine months ended August 31, 2015. The adjustments relate to a classification error in the reporting of net change in bank overdrafts within our Consolidated Statements of Cash Flows. The adjustments have no effect on our Consolidated Statements of Financial Condition, the Consolidated Statements of Earnings, the Consolidated Statements of Changes in Equity or the Consolidated Statements of Comprehensive Income for the nine months ended August 31, 2015. We do not believe these adjustments are material to our financial statements for any previously reported period.