Schedule I (PARENT COMPANY ONLY) - CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Nov. 30, 2019	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Revenues:
Principal transactions										$ 769,258	$ 524,296	$ 796,633
Revenue from contracts with customers										2,222,257	2,594,887
Interest										1,496,529	1,207,095	905,601
Other										93,422	103,359	74,553
Total revenues		$ 1,073,536	$ 1,141,631	$ 1,314,493	$ 1,054,872	$ 1,097,943	$ 1,088,285	$ 1,156,809	$ 1,086,595	4,584,532	4,429,632	4,178,582
Interest expense										1,472,002	1,246,256	980,473
Net revenues		747,802	777,159	901,851	685,718	761,958	777,615	822,557	821,246	3,112,530	3,183,376	3,198,109
Non-interest expenses:
Total non-interest expenses										2,787,861	2,773,709	2,693,185
Earnings before income taxes		$ 23,871	$ 83,075	$ 155,138	$ 62,585	$ 77,963	$ 87,101	$ 121,865	$ 122,738	324,669	409,667	504,924
Income tax expense (benefit)										80,284	250,650	147,340
Net earnings										244,385	159,017	357,584
Net earnings attributable to Jefferies Group LLC										246,029	158,761	357,498
Other comprehensive income (loss), net of tax:
Currency translation and other adjustments	[1]									6,426	(85,554)	53,396
Change in instrument specific credit risk	[2]									(13,161)	22,160	(21,394)
Cash flow hedges	[3]									(470)	1,406	(936)
Minimum pension liability adjustments, net of tax	[4]									(1,318)	4,285	312
Unrealized gain on available-for-sale securities	[5]									487	311	0
Total other comprehensive income (loss), net of tax	[6]									(8,036)	(57,392)	31,378
Comprehensive income attributable to Jefferies Group LLC										237,993	101,369	388,876
Parent Company
Revenues:
Principal transactions										13,746	20,875	576
Interest										271,369	262,042	241,357
Other										19,346	101,284	78,812
Total revenues										304,564	384,201	322,011
Interest expense										297,927	316,050	276,727
Net revenues										6,637	68,151	45,284
Non-interest expenses:
Total non-interest expenses										6,482	5,016	13,598
Earnings before income taxes										155	63,135	31,686
Income tax expense (benefit)										(3,316)	104,649	(21,292)
Net earnings										3,471	(41,514)	52,978
Undistributed earnings of subsidiaries										242,558	200,275	304,520
Net earnings attributable to Jefferies Group LLC										246,029	158,761	357,498
Other comprehensive income (loss), net of tax:
Currency translation and other adjustments										6,426	(85,554)	53,396
Change in instrument specific credit risk										(13,161)	22,160	(21,394)
Cash flow hedges										(470)	1,406	(936)
Minimum pension liability adjustments, net of tax										(1,318)	4,285	312
Unrealized gain on available-for-sale securities										487	311	0
Total other comprehensive income (loss), net of tax										(8,036)	(57,392)	31,378
Comprehensive income attributable to Jefferies Group LLC										237,993	101,369	388,876
Asset management fees
Revenues:
Revenue from contracts with customers										17,219	21,214
Asset management fees | Parent Company
Revenues:
Revenue from contracts with customers										0	0	1,266
Investment banking
Revenues:
Revenue from contracts with customers										1,528,729	1,910,203	1,764,285
Investment banking | Parent Company
Revenues:
Revenue from contracts with customers										$ 103	$ 0	$ 0

[1] The amounts include income tax benefits (expenses) of approximately $(3.2) million and $8.9 million during the year ended November 30, 2019 and 2018, respectively, related to the impact of certain discrete items related to tax planning for our non-U.S. subsidiaries in connection with the Tax Cuts and Jobs Act (the “Tax Act”). The amount during the year ended November 30, 2018 also includes a gain of $20.5 million related to foreign currency gains, which was reclassified to Other revenues within the Consolidated Statements of Earnings.

[2] The amounts include income tax benefits (expenses) of approximately $4.5 million, $(15.5) million, and $13.2 million for the years ended November 30, 2019, 2018 and 2017, respectively. The amount for the year ended November 30, 2019 includes a gain of $0.4 million, net of taxes of $0.2 million, related to changes in instrument specific risk, which was reclassified to Principal transactions revenues within the Consolidated Statements of Earnings. The amount during the year ended November 30, 2018 includes a gain of $0.9 million, net of taxes of $0.3 million, related to changes in instrument specific risk, which was reclassified to Principal transactions revenues within the Consolidated Statements of Earnings and also includes $(6.5) million related to the Tax Act, which was reclassified to Member’s paid-in capital.

[3] The amounts include income tax benefits (expenses) of approximately $0.2 million, $(0.8) million, and $0.6 million for the years ended November 30, 2019, 2018 and 2017, respectively. The cash flow hedge loss of $0.5 million during the year ended November 30, 2019 was reclassified to Other revenues within the Consolidated Statement of Earnings due to the sale of all of our common shares of Epic Gas Ltd. (“Epic Gas”). Refer to Note 9, Investments, for further information. The amount during the year ended November 30, 2018 also includes $(0.2) million related to the Tax Act, which was reclassified to Member’s paid-in capital.

[4] The amounts include income tax benefits (expenses) of $0.5 million, $(0.7) million and $0.1 million for the years ended November 30, 2019, 2018 and 2017, respectively. The amount during the year ended November 30, 2019 includes pension losses of $(0.1) million, which was reclassified to Compensation and benefits expenses within the Consolidated Statements of Earnings. The amount during the year ended November 30, 2018 includes $5.3 million related to the transfer of the German Pension Plan and $(0.3) million, net of taxes of $0.1 million, related to pension losses, which were reclassified to Compensation and benefits expenses within the Consolidated Statements of Earnings and $(0.8) million related to the Tax Act, which was reclassified to Member’s paid-in capital.

[5] The amounts for the years ended November 30, 2019 and 2018 include income tax expense of approximately $0.2 million and $0.1 million, respectively.

[6] None of the components of other comprehensive income are attributable to noncontrolling interests.