Investments - Summary of Selected Financial Information for JCP Fund V (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended			12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020	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]
Total partners’ capital							$ 10,295,479	10,579,640	[1]	$ 9,438,525
JCP Fund V
Schedule of Equity Method Investments [Line Items]
Total assets				$ 68,000	$ 72,000
Total liabilities				0	0
Total partners’ capital				68,000	72,000
JCP Fund V
Schedule of Equity Method Investments [Line Items]
Ownership percentage							35.20%
Net gains (losses) from our investments in JCP Fund V							$ 100	$ 7,700		$ (3,000)
Net increase (decrease) in net assets resulting from operations	$ (3,200)	$ (1,000)	$ (1,400)	$ (1,300)	$ 23,800	$ (12,500)
Jefferies Capital Partners V L.P.
Schedule of Equity Method Investments [Line Items]
Ownership percentage							11.00%
SBI USA Fund L.P.
Schedule of Equity Method Investments [Line Items]
Ownership percentage							50.00%

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