Leucadia and Related Transactions - Additional Information (Detail) (USD $)		3 Months Ended				3 Months Ended				1 Months Ended
	Feb. 28, 2014 3.875% Convertible Senior Debentures, due 2029 [Member]	Feb. 28, 2013 3.25% Cumulative Convertible Preferred Shares [Member]	Feb. 28, 2013 Series A-1 Convertible Cumulative Preferred Stock [Member]	Feb. 28, 2013 Leucadia [Member]	Mar. 31, 2013 Leucadia [Member]	Feb. 28, 2013 Leucadia [Member] Predecessor [Member]	Feb. 28, 2014 Leucadia [Member] 3.875% Convertible Senior Debentures, due 2029 [Member]	Feb. 28, 2013 Leucadia [Member] 3.25% Cumulative Convertible Preferred Shares [Member]	Feb. 28, 2013 Jefferies Group Inc. [Member] Series A-1 Convertible Cumulative Preferred Stock [Member]	Feb. 28, 2013 Jefferies High Yield Holdings, LLC [Member]
Business Acquisition [Line Items]
Exchange ratio				0.81
Convertible Cumulative Preferred Stock				$ 125,000,000				$ 125,000,000	$ 125,000,000
Convertible Cumulative Preferred Stock, dividend rate		3.25%	3.25%	3.25%				3.25%	3.25%
Debt instrument principal amount							345,000,000
Debt instrument interest rate	3.875%						3.875%
Debt instrument maturity year							2029
Cost of assets acquired				4,754,101,000
Business acquisition transaction cost						2,100,000
Intangible assets, not including good will				282,900,000
Goodwill				1,720,380,000
Third party noncontrolling interests redeemed										347,600,000
Redeemable preferred interests					$ 362,300,000