Long-Term Debt - Additional Information (Detail)				0 Months Ended			6 Months Ended		0 Months Ended			0 Months Ended
	May 31, 2014 USD ($)	Feb. 28, 2013 USD ($)	Aug. 26, 2011 USD ($)	Jun. 26, 2014 Subsequent event [Member] USD ($)	Jun. 12, 2014 Leucadia [Member] Subsequent event [Member] USD ($)	May 31, 2014 3.875% Convertible Senior Debentures due 2029 [Member] USD ($)	May 31, 2014 3.875% Convertible Senior Debentures due 2029 [Member] Leucadia [Member] USD ($) Trading_day	Jan. 15, 2013 New senior unsecured long-term debt [Member] USD ($)	Jan. 15, 2013 5.125% Senior Notes, due 2023 [Member] USD ($)	Jan. 15, 2013 6.5% Senior Notes, due 2043 [Member] USD ($)	May 20, 2014 Euro Medium Term Note Program [Member] USD ($)	May 20, 2014 2.375% Euro Medium Term Notes, due 2020 [Member] EUR (€)	May 31, 2014 2.375% Euro Medium Term Notes, due 2020 [Member]	May 20, 2014 2.375% Euro Medium Term Notes, due 2020 [Member] EUR (€)
Debt Instrument [Line Items]
Long-term debt at fair value		$ 6,100,000,000
Difference between fair value over the total principal amount		536,500,000
Issuance of senior unsecured long-term debt						345,000,000		1,000,000,000	600,000,000	400,000,000	2,000,000,000			500,000,000
Proceeds, net of original issue discount amount									595,600,000	391,700,000		498,700,000
Senior long-term debt, interest rate						3.875%	3.875%		5.125%	6.50%			2.375%	2.375%
Senior long-term debt, due date									2023	2043		2020
Debenture principal amount					1,000
Debt instrument convertible conversion ratio					22.0775
Conversion price of common stock					$ 45.29
Debt instrument convertible conversion ratio							130.00%
Earliest period of conversion price							20
Latest period of conversion price							30 days
Consecutive trading days							10 days
Trading price per debenture related to common stock							95.00%
Debentures convertible at holder's options							1) Leucadia's common stock price is greater than or equal to 130% of the conversion price for at least 20 trading days in a period of 30 consecutive trading days; 2) if the trading price per debenture is less than 95% of the price of the common stock times the conversion ratio for any 10 consecutive trading days; 3) if the debentures are called for redemption; or 4) upon the occurrence of specific corporate actions.
Description to redeem the debentures for par, plus accrued interest							On or after November 1, 2012 if the price of Leucadia's common stock is greater than 130% of the conversion price for at least 20 days in a period of 30 consecutive trading days and we may redeem the debentures for par, plus accrued interest, at our election any time on or after November 1, 2017.
Description of contingent debenture interest payment							November 1, 2017, 2019 and 2024. In addition to ordinary interest, commencing November 1, 2017, contingent interest will accrue at 0.375% if the average trading price of a debenture for 5 trading days ending on and including the third trading day immediately preceding a six-month interest period equals or exceed $1,200 per $1,000 debenture
Trading price of contingent interest							1,200
Revolving credit facility			950,000,000
Borrowed unsecured credit facility-JBL	250,000,000		250,000,000
Amended and restated credit facility period				3 years
Line of credit reduced borrowing capacity				$ 750,000,000