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Regulatory Requirements - Schedule of Net Capital and Excess Net Capital (Details) $ in Thousands	Nov. 30, 2024 USD ($)
Jefferies LLC
Net Capital Requirements [Line Items]
Net Capital	$ 2,018,251
Excess Net Capital	1,879,220
JFSI - SEC
Net Capital Requirements [Line Items]
Net Capital	348,588
Excess Net Capital	325,511
JFSI - CFTC
Net Capital Requirements [Line Items]
Net Capital	348,588
Excess Net Capital	$ 322,144

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- Definition

Net Capital Requirements [Line Items]

+ References

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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

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- Definition

Amount of net capital of broker-dealer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Rule 15c3-1
-Number 240
-Section 15c3-1
-Publisher SEC

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