Investments - Jefferies Finance - Narrative (Details) - Jefferies Finance	12 Months Ended
	Nov. 30, 2022 USD ($) businessLine	Nov. 30, 2021 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of business lines | businessLine	2
Equity commitment	$ 750,000,000
Total committed equity capitalization	1,500,000,000
Unfunded portion of equity commitment to subsidiary	$ 15,400,000
Extension period	1 year
Termination notice period	60 days
Funded portion of loan commitment	$ 0
Loan commitment	250,000,000
Other assets (3)
Schedule of Equity Method Investments [Line Items]
Receivables under service agreement	1,200,000	$ 26,200,000
Accrued expense and other liabilities
Schedule of Equity Method Investments [Line Items]
Payables under service agreement	500,000	$ 8,500,000
Committed advances
Schedule of Equity Method Investments [Line Items]
Committed line of credit facility amount	$ 500,000,000
Jefferies Finance
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%