Organization and Basis of Presentation - Reclassification (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2022	Nov. 30, 2021		Nov. 30, 2020
ASSETS
Financial instruments owned	$ 18,666,296	$ 18,024,621	[1]
Investments in and loans to related parties	1,426,817	1,587,409	[1]
Brokers, dealers and clearing organizations	1,792,937	2,454,918	[1]
Customers	1,225,137	1,615,822	[1]
Fees, interest and other	568,921	582,756	[1]
Intangible assets, net and goodwill		0
Goodwill	1,736,114	1,745,098	[1]	$ 1,746,314
Other Assets	3,595,985	3,356,024	[1]
Total assets	51,057,683	56,107,311	[1]
Liabilities:
Financial instruments sold, not yet purchased, at fair value	11,056,477	9,267,090	[1]
Brokers, dealers and clearing organizations	2,628,727	3,952,093	[1]
Customers	3,578,854	4,461,481	[1]
Accrued expenses and other liabilities	2,573,927	3,334,371	[1]
Total liabilities	40,630,743	45,377,271	[1]
Revenues	7,149,263	8,945,464	[1]	6,880,447	[1]
Interest expense	1,170,425	931,638	[1]	1,029,926	[1]
Net revenues	5,978,838	8,013,826	[1]	5,850,521	[1]
Compensation and benefits	2,589,044	3,554,760	[1]	2,944,071	[1]
Selling, general and other expenses		0		0
Underwriting costs	42,067	117,572	[1]	95,636	[1]
Technology and communications	444,011	388,134	[1]	335,065	[1]
Occupancy and equipment rental	108,001	106,254	[1]	95,754	[1]
Business development	150,500	109,772	[1]	70,797	[1]
Professional services	240,978	215,761	[1]	176,280	[1]
Other expenses	387,131	337,318	[1]	302,216	[1]
Total non-interest expenses	4,923,276	5,759,721	[1]	4,783,438	[1]
Income (loss) related to associated companies	(36,300)	149,900		(75,200)
Other contracts with customers
Liabilities:
Revenues	1,318,288	1,038,012	[1]	584,805	[1]
JFG Pre Merger
ASSETS
Receivables		0
Liabilities:
Payables, expense accruals and other liabilities		0
Interest expense		0		0
Income (loss) related to associated companies		0		0
As Originally Reported
ASSETS
Financial instruments owned		19,828,670
Investments in and loans to related parties		1,745,790
Receivables		7,839,240
Brokers, dealers and clearing organizations		0
Customers		0
Fees, interest and other		0
Intangible assets, net and goodwill		1,897,500
Goodwill		0
Other Assets		2,352,247
Total assets		60,404,110
Liabilities:
Financial instruments sold, not yet purchased, at fair value		11,699,467
Brokers, dealers and clearing organizations		0
Customers		0
Accrued expenses and other liabilities		0
Total liabilities		49,674,070
Principal transactions		1,623,713		1,916,508
Asset management fees and revenues		0		0
Other		1,211,120		718,125
Revenues		9,039,883		6,955,930
Interest		943,336		997,555
Interest expense		854,554		945,056
Net revenues		8,185,329		6,010,874
Compensation and benefits		3,551,124		2,940,863
Selling, general and other expenses		1,278,447		1,078,956
Underwriting costs		0		0
Technology and communications		0		0
Occupancy and equipment rental		0		0
Business development		0		0
Professional services		0		0
Other expenses		0		0
Total non-interest expenses		5,836,805		4,868,308
As Originally Reported | JFG Pre Merger
Liabilities:
Payables, expense accruals and other liabilities		13,612,367
Interest expense		77,084		84,870
Income (loss) related to associated companies		(94,419)		(75,483)
Increases/Decreases due to reclassifications
ASSETS
Financial instruments owned		50,964
Investments in and loans to related parties		(158,381)
Brokers, dealers and clearing organizations		4,896,704
Customers		1,615,822
Fees, interest and other		582,756
Intangible assets, net and goodwill		(1,897,500)
Goodwill		1,745,098
Other Assets		1,003,777
Total assets		0
Liabilities:
Financial instruments sold, not yet purchased, at fair value		0
Brokers, dealers and clearing organizations		5,816,515
Customers		4,461,481
Accrued expenses and other liabilities		3,334,371
Total liabilities		0
Principal transactions		(6,377)		11,635
Asset management fees and revenues		72,084		34,209
Other		(173,108)		(133,320)
Revenues		(94,419)		(75,483)
Interest		12,982		11,993
Interest expense		77,084		84,870
Net revenues		(171,503)		(160,353)
Compensation and benefits		3,636		3,208
Selling, general and other expenses		(1,278,447)		(1,078,956)
Underwriting costs		117,572		95,636
Technology and communications		388,134		335,065
Occupancy and equipment rental		106,254		95,754
Business development		109,772		70,797
Professional services		215,761		176,280
Other expenses		337,318		302,216
Total non-interest expenses		(77,084)		(84,870)
Increases/Decreases due to reclassifications | Automobile Loan
ASSETS
Other Assets		745,300
Increases/Decreases due to reclassifications | JFG Pre Merger
ASSETS
Receivables		(7,839,240)
Liabilities:
Payables, expense accruals and other liabilities		(13,612,367)
Interest expense		(77,084)		(84,870)
Income (loss) related to associated companies		94,419		$ 75,483
Increases/Decreases due to change in accounting policy
ASSETS
Financial instruments owned	2,100,000	(1,855,013)
Investments in and loans to related parties		0
Brokers, dealers and clearing organizations	3,100,000	(2,441,786)
Customers		0
Fees, interest and other		0
Intangible assets, net and goodwill		0
Goodwill		0
Other Assets		0
Total assets		(4,296,799)
Liabilities:
Financial instruments sold, not yet purchased, at fair value	2,800,000	(2,432,377)
Brokers, dealers and clearing organizations	$ 2,400,000	(1,864,422)
Customers		0
Accrued expenses and other liabilities		0
Total liabilities		(4,296,799)
Increases/Decreases due to change in accounting policy | JFG Pre Merger
ASSETS
Receivables		0
Liabilities:
Payables, expense accruals and other liabilities		$ 0

[1] See Note 1 for a description of financial statement presentation changes made as a result of our Merger with Jefferies Group.