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Regulatory Requirements- Narrative (Details) - USD ($) $ in Thousands | Aug. 31, 2025 | Nov. 30, 2024
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Net Capital Requirements [Line Items] |  |
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations | $ 1,111,620 | $ 1,132,612
Jefferies International Limited |  |
Net Capital Requirements [Line Items] |  |
Net capital | 2,020,000 |
Excess net capital | 1,150,000 |
Jefferies LLC |  |
Net Capital Requirements [Line Items] |  |
Net capital | 2,204,515 |
Excess net capital | 2,061,318 |
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations | 875,600 |
Jefferies Inc |  |
Net Capital Requirements [Line Items] |  |
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations | $ 437,800 |

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- Definition Amount of net capital in excess of minimum required net capital, calculated under Alternative Standard. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Rule 15c3-1 -Number 240 -Section 15c3-1 -Publisher SEC + Details
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