Commitments, Contingencies and Guarantees - Additional Information (Details) $ in Millions |
6 Months Ended |
|---|---|
|
May 31, 2022
USD ($)
| |
| Loss Contingencies [Line Items] | |
| Fair value of derivative contracts approximated deemed to meet the definition of a guarantee | $ 600.7 |
| Standby letters of credit | |
| Loss Contingencies [Line Items] | |
| Letters of credit commitments | $ 7.6 |
| Standby letters of credit | Maximum | |
| Loss Contingencies [Line Items] | |
| Standby letters of credit expiration period | 1 year |
| Outstanding loan commitments to clients | |
| Loss Contingencies [Line Items] | |
| Loan commitments outstanding to clients | $ 91.6 |
| Jefferies Capital Partners LLC | |
| Loss Contingencies [Line Items] | |
| Outstanding equity commitments | 10.7 |
| Oak Hill | |
| Loss Contingencies [Line Items] | |
| Outstanding equity commitments | 70.8 |
| Strategic Affiliates | |
| Loss Contingencies [Line Items] | |
| Outstanding equity commitments | 350.0 |
| Other Investments | |
| Loss Contingencies [Line Items] | |
| Outstanding equity commitments | $ 46.8 |