Commitments, Contingencies and Guarantees - Additional Information (Details)	12 Months Ended
	Nov. 30, 2022 USD ($)
Loss Contingencies [Line Items]
Fair value of derivative contracts approximated deemed to meet the definition of a guarantee	$ 702,100,000
Berkadia
Loss Contingencies [Line Items]
Reimbursement of losses incurred, maximum percentage	50.00%
Surety policy issued	$ 1,500,000,000
Commercial paper	1,470,000,000
HomeFed LLC
Loss Contingencies [Line Items]
Bonds outstanding	70,700,000
Standby letters of credit
Loss Contingencies [Line Items]
Letters of credit commitments	$ 57,600,000
Letters of credit commitments expiration period	1 year
Clients
Loss Contingencies [Line Items]
Loan commitments outstanding to clients	$ 97,400,000
Strategic Affiliates
Loss Contingencies [Line Items]
Loan commitments outstanding to clients	4,000,000
Jefferies Capital Partners LLC
Loss Contingencies [Line Items]
Outstanding equity commitments	10,600,000
Third parties
Loss Contingencies [Line Items]
Outstanding equity commitments	230,100,000
Other investments
Loss Contingencies [Line Items]
Outstanding equity commitments	$ 36,800,000