Investments - Summary of Selected Financial Information for Jefferies Finance (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2022	Nov. 30, 2021		Nov. 30, 2020
Schedule of Equity Method Investments [Line Items]
Total assets	$ 51,057,683	$ 56,107,311	[1]
Total liabilities	40,630,743	45,377,271	[1]
Net earnings (loss)	781,710	1,677,376	[1]	$ 768,410	[1]
Jefferies Finance
Schedule of Equity Method Investments [Line Items]
Total assets	6,763,000	8,258,700
Total liabilities	5,490,100	6,843,900
Net earnings (loss)	(129,400)	205,700		(74,900)
Jefferies Finance
Schedule of Equity Method Investments [Line Items]
Interest income	400	1,500		2,400
Unfunded commitment fees	1,200	1,200		1,100
Our total equity balance	636,400	707,400
Origination and syndication fee revenues	194,700	410,500		198,100
Origination fee expenses	39,700	66,800		27,300
CLO placement fee revenues	4,600	5,700		1,700
Underwriting fees	0	2,500		1,700
Service fees	$ 94,700	$ 85,100		$ 65,100

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