Schedule I (PARENT COMPANY ONLY) (CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Nov. 30, 2016	Aug. 31, 2016	May 31, 2016	Feb. 29, 2016	Nov. 30, 2015	Aug. 31, 2015	May 31, 2015	Feb. 28, 2015	Nov. 30, 2016		Nov. 30, 2015	Nov. 30, 2014
Revenues:
Principal transactions										$ 519,652		$ 172,608	$ 532,292
Asset management fees and investment income from managed funds										31,062		8,015	17,047
Interest										857,838		922,189	1,019,970
Other										19,724		74,074	78,881
Total revenues		$ 939,960	$ 863,841	$ 936,917	$ 493,105	$ 701,930	$ 781,123	$ 1,008,510	$ 783,332	3,233,823		3,274,895	3,846,265
Interest expense										819,209		799,654	856,127
Net revenues		741,769	654,450	719,408	298,987	513,087	578,928	791,554	591,672	2,414,614		2,475,241	2,990,138
Non-interest expenses:
Total non-interest expenses										2,384,642		2,361,014	2,687,117
Income before income tax expense		$ 96,529	$ 80,722	$ 102,597	$ (249,876)	$ 9,538	$ 7,093	$ 84,712	$ 12,884	29,972		114,227	303,021
Income tax expense (benefit)										14,566		18,898	142,061
Net earnings										15,406		95,329	160,960
Net earnings attributable to Jefferies Group LLC										15,434		93,534	157,560
Other comprehensive income (loss), net of tax:
Currency translation and other adjustments										(115,494)		(27,157)	(30,995)
Changes in instrument specific credit risk, net of tax										(6,494)	[1]	0	0
Minimum pension liability adjustments, net of tax	[2]									(1,223)		(3,116)	(7,778)
Total other comprehensive income (loss), net of tax	[3]									(123,211)		(30,273)	(38,773)
Comprehensive income (loss) attributable to Jefferies Group LLC										(107,777)		63,261	118,787
Parent Company [Member]
Revenues:
Principal transactions										952		68,720	46,416
Asset management fees and investment income from managed funds										1,222		(20,889)	(7,452)
Interest										226,781		201,632	194,568
Other										(8,156)		33,193	81,511
Total revenues										220,799		282,656	315,043
Interest expense										235,556		250,919	251,020
Net revenues										(14,757)		31,737	64,023
Non-interest expenses:
Total non-interest expenses										5,187		5,984	9,263
Income before income tax expense										(19,944)		25,753	54,760
Income tax expense (benefit)										(9,574)		3,958	22,650
Net earnings										(10,370)		21,795	32,110
Undistributed earnings of subsidiaries										25,804		71,739	125,450
Net earnings attributable to Jefferies Group LLC										15,434		93,534	157,560
Other comprehensive income (loss), net of tax:
Currency translation and other adjustments										(115,494)		(27,157)	(30,995)
Changes in instrument specific credit risk, net of tax										(6,494)		0	0
Minimum pension liability adjustments, net of tax										(1,223)		(3,116)	(7,778)
Total other comprehensive income (loss), net of tax										(123,211)		(30,273)	(38,773)
Comprehensive income (loss) attributable to Jefferies Group LLC										$ (107,777)		$ 63,261	$ 118,787

[1] Includes income tax benefit of approximately $4.3 million for the year ended November 30, 2016.

[2] Includes income tax benefit of approximately $0.3 million, $4.2 million and $0.5 million for the years ended November 30, 2016, 2015 and 2014, respectively.

[3] None of the components of other comprehensive loss are attributable to noncontrolling interests.