XML 87 R74.htm IDEA: XBRL DOCUMENT
v3.26.1

Securitization Activities - Schedule of Financial Instruments Owned (Details) - USD ($) $ in Thousands | Feb. 28, 2026 | Nov. 30, 2025
--- | --- | ---
Schedule Of Securitization Vehicles [Line Items] |  |
Financial instruments owned | $ 28,079,458 | $ 27,722,739
Other secured financings | 2,285,995 | 2,885,878
Securitization Activity |  |
Schedule Of Securitization Vehicles [Line Items] |  |
Financial instruments owned | 0 | 456,100
Other secured financings | $ 0 | $ 456,100

X
- Definition Schedule Of Securitization Vehicles [Line Items] + References No definition available. + Details
Name: | jef_ScheduleOfSecuritizationVehiclesLineItems
Namespace Prefix: | jef_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 940 -SubTopic 320 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479035/940-320-45-2 + Details
Name: | us-gaap_FinancialInstrumentsOwnedAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Secured financing other than securities sold under agreements to repurchase and securities loaned. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-7 + Details
Name: | us-gaap_OtherSecuredFinancings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | jef_VariableInterestEntitiesNameAxis=jef_SecuritizationActivityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |