Revenues from Contracts with Customers - Components of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2022	Nov. 30, 2021		Nov. 30, 2020
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers:	$ 4,742,858	$ 6,141,801		$ 3,923,227
Total revenues	7,149,263	8,945,464	[1]	6,880,447	[1]
Investment banking
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers:	2,807,822	4,365,699		2,501,494
Total revenues	2,807,822	4,365,699	[1]	2,501,494	[1]
Commissions and other fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers:	925,494	896,015		822,248
Total revenues	925,494	896,015	[1]	822,248	[1]
Asset management fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers:	23,525	14,836		14,702
Total revenues	80,264	72,084	[1]	34,209	[1]
Manufacturing revenues
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers:	412,605	538,628		421,434
Oil and gas revenues
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers:	302,135	182,973		102,210
Real estate revenues
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers:	223,323	102,297		26,671
Other contracts with customers
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers:	47,954	41,353		34,468
Total revenues	1,318,288	1,038,012	[1]	584,805	[1]
Principal transactions
Disaggregation of Revenue [Line Items]
Other sources of revenue	833,757	1,617,336		1,928,143
Total revenues	833,757	1,617,336	[1]	1,928,143	[1]
Revenues from strategic affiliates
Disaggregation of Revenue [Line Items]
Other sources of revenue	56,739	57,248		19,507
Interest
Disaggregation of Revenue [Line Items]
Other sources of revenue	1,183,638	956,318		1,009,548
Total revenues	1,183,638	956,318	[1]	1,009,548	[1]
Other
Disaggregation of Revenue [Line Items]
Other sources of revenue	$ 332,271	$ 172,761		$ 22

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