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Organization and Basis of Presentation (Detail)
$ in Thousands, € in Millions
3 Months Ended
Oct. 01, 2018
USD ($)
Feb. 28, 2019
segment
Dec. 28, 2017
EUR (€)
Dec. 28, 2017
USD ($)
Debt Instrument [Line Items]        
Number of operating segments | segment   2    
Affiliated Entity | Jefferies        
Debt Instrument [Line Items]        
Proceeds from contributions from parent $ 598,200      
Payment made in related party transaction 76,000      
Related party transaction, related deferred tax liabilities transferred $ 50,900      
Berkadia Commercial Mortgage, LLC        
Debt Instrument [Line Items]        
Ownership percentage 50.00%      
GERMANY | Pension Plan        
Debt Instrument [Line Items]        
Consideration for release of indemnity relating to pension obligations       $ 3,250
Jefferies Bache Limited | GERMANY | Pension Plan        
Debt Instrument [Line Items]        
Defined benefit pension obligations and insurance contracts transfer amount | €     € 6.5