Cash Invested In Limited Liability Company

No definition available.

Name:	jef_CashInvestedInLimitedLiabilityCompany
Namespace Prefix:	jef_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Contributions from Noncontrolling Interests

+ References

No definition available.

+ Details

Name:	jef_ContributionsfromNoncontrollingInterests
Namespace Prefix:	jef_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Ownership Percentage

+ References

No definition available.

+ Details

Name:	jef_OwnershipPercentage
Namespace Prefix:	jef_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Prior Ownership Percentage

+ References

No definition available.

+ Details

Name:	jef_PriorOwnershipPercentage
Namespace Prefix:	jef_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_EquityMethodInvestmentAggregateCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=jef_GoldenQueenMiningCoLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=jef_GoldenQueenMiningCompanyLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=jef_GaussLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=jef_ClayFamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Loans to and Investments in Associated Companies - Golden Queen Mining Company (Details) - USD ($) $ in Millions	95 Months Ended
	Nov. 30, 2021	Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]
Cash invested in Limited Liability Company	$ 93.0
Golden Queen Mining Co, Ltd
Schedule of Equity Method Investments [Line Items]
Prior ownership percentage		100.00%
Ownership percentage	50.00%
Golden Queen
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage	50.00%
Golden Queen \| Gauss LLC
Schedule of Equity Method Investments [Line Items]
Total investment in associated company	$ 127.5
Clay Family
Schedule of Equity Method Investments [Line Items]
Contributions from noncontrolling interests	$ 34.5