Variable Interest Entities (Assets And Liabilities Of Consolidated VIEs) (Details) - USD ($) $ in Thousands		Aug. 31, 2019	Nov. 30, 2018
Variable Interest Entity [Line Items]
Securities purchased under agreement to resell		$ 4,499,995	$ 2,785,758
Receivables		5,826,350	6,287,401
Other		2,398,251	1,859,561
Total assets	[1]	49,263,208	47,131,095
Other secured financings		2,508,589	1,534,271
Total liabilities	[1]	39,063,363	36,907,059
Jefferies Group
Variable Interest Entity [Line Items]
Secured financings eliminated in consolidation			1,000
Consolidation adjustments
Variable Interest Entity [Line Items]
Intercompany payables		27,300	44,100
Securitization Vehicles
Variable Interest Entity [Line Items]
Securities purchased under agreement to resell		1,822,100	883,100
Receivables		676,400	626,000
Other		49,000	78,400
Total assets		2,547,500	1,587,500
Other secured financings		2,508,000	1,535,300
Other		29,600	45,900
Total liabilities		$ 2,537,600	$ 1,581,200

[1] Total assets include assets related to variable interest entities of $726.8 million and $704.4 million at August 31, 2019 and November 30, 2018, respectively, and Total liabilities include liabilities related to variable interest entities of $2,510.3 million and $1,535.8 million at August 31, 2019 and November 30, 2018, respectively. See Note 8 for additional information related to variable interest entities.