Long-Term Debt - Schedule of Debt (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
May 31, 2022
May 31, 2021
May 31, 2022
May 31, 2021
Nov. 30, 2021
Debt Instrument [Line Items]          
Long-term debt $ 8,882,095   $ 8,882,095   $ 9,125,745
Gains (losses) recognized in interest expense of Jefferies Group $ 4,626 $ 3,544 $ 11,170 $ 6,564  
5.50% Senior Notes due October 18, 2023          
Debt Instrument [Line Items]          
Interest rate 5.50%   5.50%   5.50%
Principal outstanding $ 441,748   $ 441,748   $ 441,748
6.625% Senior Notes due October 23, 2043          
Debt Instrument [Line Items]          
Interest rate 6.625%   6.625%   6.625%
Principal outstanding $ 250,000   $ 250,000   $ 250,000
1.00% Euro Medium Term Notes, due July 19, 2024          
Debt Instrument [Line Items]          
Interest rate 1.00%   1.00%   1.00%
Principal outstanding $ 536,850   $ 536,850   $ 566,150
4.85% Senior Notes, due January 15, 2027          
Debt Instrument [Line Items]          
Interest rate 4.85%   4.85%   4.85%
Principal outstanding $ 750,000   $ 750,000   $ 750,000
6.45% Senior Debentures, due June 8, 2027          
Debt Instrument [Line Items]          
Interest rate 6.45%   6.45%   6.45%
Principal outstanding $ 350,000   $ 350,000   $ 350,000
4.15% Senior Notes, due January 23, 2030          
Debt Instrument [Line Items]          
Interest rate 4.15%   4.15%   4.15%
Principal outstanding $ 1,000,000   $ 1,000,000   $ 1,000,000
2.625% Senior Notes, due October 15, 2031          
Debt Instrument [Line Items]          
Interest rate 2.625%   2.625%   2.625%
Principal outstanding $ 1,000,000   $ 1,000,000   $ 1,000,000
2.75% Senior Notes, due October 15, 2032          
Debt Instrument [Line Items]          
Interest rate 2.75%   2.75%   2.75%
Principal outstanding $ 500,000   $ 500,000   $ 500,000
6.25% Senior Debentures, due January 15, 2036          
Debt Instrument [Line Items]          
Interest rate 6.25%   6.25%   6.25%
Principal outstanding $ 495,000   $ 495,000   $ 495,000
6.50% Senior Notes, due January 20, 2043          
Debt Instrument [Line Items]          
Interest rate 6.50%   6.50%   6.50%
Principal outstanding $ 391,000   $ 391,000   $ 391,000
Parent company          
Debt Instrument [Line Items]          
Long-term debt 687,457   687,457   687,008
Parent company | 5.50% Senior Notes due October 18, 2023          
Debt Instrument [Line Items]          
Long-term debt 440,536   440,536   440,120
Parent company | 6.625% Senior Notes due October 23, 2043          
Debt Instrument [Line Items]          
Long-term debt 246,921   246,921   246,888
Subsidiaries          
Debt Instrument [Line Items]          
Long-term debt 8,194,638   8,194,638   8,438,737
Subsidiaries | 1.00% Euro Medium Term Notes, due July 19, 2024 | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 535,932   535,932   564,985
Subsidiaries | 4.85% Senior Notes, due January 15, 2027 | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 728,582   728,582   775,550
Subsidiaries | 6.45% Senior Debentures, due June 8, 2027 | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 365,253   365,253   366,556
Subsidiaries | 4.15% Senior Notes, due January 23, 2030 | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 991,016   991,016   990,525
Subsidiaries | 2.625% Senior Notes, due October 15, 2031 | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 932,107   932,107   988,059
Subsidiaries | 2.75% Senior Notes, due October 15, 2032 | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 409,167   409,167   460,724
Subsidiaries | 6.25% Senior Debentures, due January 15, 2036 | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 505,033   505,033   505,267
Subsidiaries | 6.50% Senior Notes, due January 20, 2043 | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 409,702   409,702   409,926
Subsidiaries | Floating Rate Senior Notes, due October 29, 2071 | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 61,709   61,709   61,703
Subsidiaries | Jefferies Group Unsecured Revolving Credit Facility | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 349,263   349,263   348,951
Subsidiaries | Structured Notes | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 1,617,020   1,617,020   1,843,598
Subsidiaries | Jefferies Group Secured Credit Facilities | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 822,035   822,035   706,608
Subsidiaries | Jefferies Group Secured Bank Loan | Jefferies Group          
Debt Instrument [Line Items]          
Long-term debt 100,000   100,000   100,000
Subsidiaries | HomeFed EB-5 Program debt          
Debt Instrument [Line Items]          
Long-term debt 207,987   207,987   203,132
Subsidiaries | HomeFed construction loans          
Debt Instrument [Line Items]          
Long-term debt 77,847   77,847   45,581
Subsidiaries | Vitesse Energy Revolving Credit Facility          
Debt Instrument [Line Items]          
Long-term debt $ 81,985   81,985   67,572
Subsidiaries | 4.85% Senior Notes, due January 15, 2027 and 2.75% Senior Notes, due October 15, 2032 | Interest rate swaps          
Debt Instrument [Line Items]          
Gains (losses) recognized in interest expense of Jefferies Group     $ 155,600 $ 52,000  
Subsidiaries | Foursight Capital | Jefferies Group Secured Credit Facilities          
Debt Instrument [Line Items]          
Long-term debt         $ 82,600