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Jefferies Finance LLC (Tables)
9 Months Ended
Aug. 31, 2011
Jefferies Finance LLC [Abstract]  
Summary of selected financial information for JFIN
                 
    August 31,     November 30,  
    2011     2010  
Total assets
  $ 1,369.6     $ 890.4  
Total liabilities
    975.2       566.4  
Total equity
    394.4       324.0  
Our total equity balance
    197.2       162.0