Related Party Transactions - Jefferies (Details) - USD ($)	3 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Nov. 30, 2021
Related Party Transaction [Line Items]
Payables-brokers, dealers and clearing organizations	$ 4,632,440,000		$ 5,814,066,000
Financial instruments sold, not yet purchased	14,682,727,000		11,690,795,000
Floor brokerage and clearing fees	83,961,000	$ 76,580,000
Corporate debt securities
Related Party Transaction [Line Items]
Financial instruments sold, not yet purchased	2,412,771,000		2,112,259,000
Jefferies | Broker-dealer payable to customer
Related Party Transaction [Line Items]
Customer account payables	1,000,000		500,000
Affiliated entity | Jefferies
Related Party Transaction [Line Items]
Charges to Jefferies for services provided	7,200,000	15,600,000
Charges from Jefferies for services received	5,100,000	9,900,000
Receivable from Jefferies	111,100,000		300,000
Payable to Jefferies	1,400,000		10,900,000
Accrued distributions payable	170,700,000
Tax receivable	54,000,000		130,600,000
Net gain (loss) on investments	0
Securities purchased from Jefferies		9,100,000
Securities sold to Jefferies		500,000
Payables-brokers, dealers and clearing organizations	600,000		700,000
Affiliated entity | Jefferies | Corporate debt securities
Related Party Transaction [Line Items]
Financial instruments sold, not yet purchased	3,300,000		2,300,000
Floor brokerage and clearing fees	200,000	500,000
Affiliated entity | Jefferies | Investment banking
Related Party Transaction [Line Items]
Charges to Jefferies for services provided	0	13,600,000
Affiliated entity | Jefferies | Commissions and other fees
Related Party Transaction [Line Items]
Charges to Jefferies for services provided	300,000	300,000
Affiliated entity | Jefferies | Distribution based on earnings
Related Party Transaction [Line Items]
Payments of distributions to affiliates	193,000,000
Affiliated entity | Subsidiary of Jefferies Financial Group Inc.
Related Party Transaction [Line Items]
Net gains on foreign exchange contracts		100,000
Affiliated entity | Monashee
Related Party Transaction [Line Items]
Net gain (loss) on investments	(2,100,000)	2,400,000
Investment in related party	8,000,000		$ 13,600,000
Affiliated entity | Oak Hill
Related Party Transaction [Line Items]
Investment in related party	4,100,000
Affiliated entity | Affiliate of Jefferies Financial Group Inc.
Related Party Transaction [Line Items]
Payments for rent and other expenses	$ 200,000	$ 200,000