Long-Term Debt - Narrative (Details) - USD ($)	3 Months Ended
Feb. 28, 2022	Nov. 30, 2021
Debt Instrument [Line Items]
Long-term debt	$ 8,896,032,000	$ 9,125,745,000
Vitesse Energy revolving credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity	140,000,000
Long-term debt	$ 68,000,000	68,000,000
Vitesse Energy revolving credit facility \| Minimum
Debt Instrument [Line Items]
Percentage of proved reserve value of oil and gas properties	85.00%
Jefferies Group \| Structured notes
Debt Instrument [Line Items]
Debt issued during period, principal amount, net of retirements	$ 71,200,000
Jefferies Group \| Secured and unsecured long-term debt \| Line of credit
Debt Instrument [Line Items]
Long-term debt	958,200,000	972,900,000
Jefferies Group \| Secured long-term debt \| Secured bank loan
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 100,000,000	100,000,000
Jefferies Group \| Secured long-term debt \| Secured bank loan \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	1.25%
HomeFed \| HomeFed construction loans
Debt Instrument [Line Items]
Construction loan, maximum borrowing amount	$ 148,600,000
Weighted average interest rate	3.39%
Long-term debt	$ 46,800,000	$ 46,800,000
HomeFed \| HomeFed construction loans \| LIBOR \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	2.15%
HomeFed \| HomeFed construction loans \| LIBOR \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	3.15%
Vitesse Energy Finance \| Vitesse Energy revolving credit facility \| LIBOR \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	2.75%
Vitesse Energy Finance \| Vitesse Energy revolving credit facility \| LIBOR \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)	3.75%

Construction Loan, Maximum Borrowing Amount

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- Definition

Debt Instrument, Issued During Period, Principal Amount, Net Of Retirements

+ References

No definition available.

+ Details

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- Definition

Line Of Credit Facility, Collateral, Percentage Of Proved Reserve Value of Oil and Gas Properties

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
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- 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.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

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- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

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