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Commitments, Contingencies and Guarantees - Narrative (Details) $ in Millions | 3 Months Ended
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Feb. 28, 2026 USD ($)
Loss Contingencies [Line Items] |
Fair value of derivative contracts approximated deemed to meet the definition of a guarantee | $ (635.0)
Standby Letters of Credit |
Loss Contingencies [Line Items] |
Letters of credit commitments | $ 345.6
Standby Letters of Credit | Maximum |
Loss Contingencies [Line Items] |
Letters of credit commitments expiration period | 1 year
HomeFed LLC |
Loss Contingencies [Line Items] |
Aggregate amount of infrastructure improvement bonds, outstanding | $ 74.4
Outstanding Loan Commitments to Clients |
Loss Contingencies [Line Items] |
Loan commitments outstanding to clients | 319.2
Outstanding Loan Commitments to Strategic Affiliates |
Loss Contingencies [Line Items] |
Loan commitments outstanding to clients | 3.4
Jefferies Capital Partners LLC |
Loss Contingencies [Line Items] |
Outstanding equity commitments | 9.7
Strategic Affiliates |
Loss Contingencies [Line Items] |
Outstanding equity commitments | 192.9
Other Investments |
Loss Contingencies [Line Items] |
Outstanding equity commitments | $ 35.7

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