v3.26.3
Investments - Summary of Selected Financial Information for Jefferies Finance (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Aug. 31, 2026
Aug. 31, 2025
Aug. 31, 2026
Aug. 31, 2025
Nov. 30, 2025
Guarantor Obligations [Line Items]          
Interest income       $ 1,000  
Total assets $ 81,301,858   $ 81,301,858   $ 76,012,347
Total liabilities 70,549,008   70,549,008   65,369,738
Total mezzanine equity 406   406   406
Net losses attributable to noncontrolling interests 288,253 $ 242,504 697,577 470,748  
Financial instruments owned, at fair value 27,282,633   27,282,633   27,722,739
Other assets 3,412,045   3,412,045   3,246,706
Financial instruments sold, not yet purchased, at fair value 15,095,989   15,095,989   13,320,152
Brokers, dealers and clearing organizations 5,182,459   5,182,459   6,955,100
Customers 6,175,387   6,175,387   5,216,714
Jefferies Finance          
Guarantor Obligations [Line Items]          
Total assets 7,417,500   7,417,500   7,356,100
Total liabilities 5,899,000   5,899,000   5,959,200
Total mezzanine equity 16,900   16,900   14,800
Net losses attributable to noncontrolling interests 45,300 27,000 113,800 25,400  
Jefferies Finance          
Guarantor Obligations [Line Items]          
Interest income 1,800 0 2,100 0  
Unfunded commitment fees 200 300 800 900  
Our total equity balance 750,800   750,800   691,000
Origination and syndication fee revenues 41,800 73,300 136,600 191,900  
Origination fee expenses 10,700 18,300 40,300 50,700  
CLO placement and structuring fee revenues 200 800 3,000 2,300  
Placement and referral fee revenues 4,800 6,100 18,500 16,100  
Asset management fee revenues 0 0 0 7,500  
Net underwriting revenues 5,000 500 3,900 500  
Service fees 25,400 $ 24,000 116,800 $ 101,000  
Jefferies Finance | Corporate Joint Venture          
Guarantor Obligations [Line Items]          
Financial instruments owned, at fair value 2,000   2,000   10,900
Other assets 13,000   13,000   7,000
Financial instruments sold, not yet purchased, at fair value 1,300   1,300   400
Brokers, dealers and clearing organizations 23,300   23,300   17,200
Customers $ 2,300   $ 2,300   $ 3,300