Schedule I (PARENT COMPANY ONLY) - CONDENSED STATEMENTS OF FINANCIAL CONDITION (Details) - USD ($) $ in Thousands	Nov. 30, 2021	Nov. 30, 2020
ASSETS
Cash and securities segregated and on deposited for regulatory purposes or deposited with clearing and depository organizations	$ 1,015,107	$ 604,321
Financial instruments owned, at fair value	19,336,237	17,686,052
Investment in subsidiaries	1,159,048	1,000,730
Other assets	892,862	972,479
Total assets	54,768,900	47,751,997
LIABILITIES AND EQUITY
Short-term borrowings	221,863	764,715
Financial instruments sold, not yet purchased, at fair value	11,690,795	10,017,522
Accrued expenses and other liabilities	3,166,987	2,663,639
Long-term debt	8,039,826	6,895,680
Total liabilities	47,690,292	41,385,865
EQUITY
Member’s paid-in capital	7,381,391	6,569,328
Accumulated other comprehensive income (loss):
Currency translation and other adjustments	(151,661)	(141,843)
Changes in instrument specific credit risk	(153,672)	(71,151)
Additional minimum pension liability	(8,843)	(8,104)
Available-for-sale securities	269	513
Total accumulated other comprehensive loss	(313,907)	(220,585)
Total Jefferies Group LLC member’s equity	7,067,484	6,348,743
Total liabilities and equity	54,768,900	47,751,997
Parent company
ASSETS
Cash and cash equivalents	640,426	1,281,786
Cash and securities segregated and on deposited for regulatory purposes or deposited with clearing and depository organizations	8,219	21,892
Financial instruments owned, at fair value	96,528	69,856
Loans to and investments in related parties	708,611	655,930
Investment in subsidiaries	6,332,604	6,411,169
Advances to subsidiaries	3,151,163	2,822,937
Subordinated notes receivable	3,868,198	2,443,383
Other assets	542,324	354,606
Total assets	15,348,073	14,061,559
LIABILITIES AND EQUITY
Short-term borrowings	6,800	11,867
Financial instruments sold, not yet purchased, at fair value	3,491	0
Accrued expenses and other liabilities	954,454	1,045,000
Long-term debt	7,315,844	6,655,949
Total liabilities	8,280,589	7,712,816
EQUITY
Member’s paid-in capital	7,381,391	6,569,328
Accumulated other comprehensive income (loss):
Currency translation and other adjustments	(151,661)	(141,843)
Changes in instrument specific credit risk	(153,672)	(71,151)
Additional minimum pension liability	(8,843)	(8,104)
Available-for-sale securities	269	513
Total accumulated other comprehensive loss	(313,907)	(220,585)
Total Jefferies Group LLC member’s equity	7,067,484	6,348,743
Total liabilities and equity	$ 15,348,073	$ 14,061,559