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Debt Narrative - Senior Unsecured Notes - Icahn Enterprises (Details) (Senior unsecured notes [Member], USD $)		0 Months Ended	3 Months Ended					0 Months Ended	6 Months Ended		3 Months Ended				3 Months Ended											0 Months Ended
	Mar. 31, 2013	Jan. 15, 2010 Initial Notes [Member]	Mar. 31, 2013 Initial Notes [Member]	Nov. 12, 2010 2016 Additional Notes [Member]	Jan. 15, 2010 7.75% senior unsecured notes due 2016 [Member]	Jan. 15, 2010 8% senior unsecured notes due 2018 [Member]	Nov. 12, 2010 2018 Additional Notes [Member]	Nov. 12, 2010 2010 Additional Notes [Member]	Jul. 12, 2012 2012 Additional Notes [Member]	Jul. 02, 2012 2012 Additional Notes [Member]	Mar. 31, 2013 Variable Rate Senior Unsecured Convertible Notes [Member]	Mar. 31, 2012 Variable Rate Senior Unsecured Convertible Notes [Member]	Apr. 30, 2007 Variable Rate Senior Unsecured Convertible Notes [Member]	Apr. 05, 2007 Variable Rate Senior Unsecured Convertible Notes [Member]	Mar. 31, 2013 Debt repurchase date range, from January 15, 2013 to January 14, 2014 [Member] 7.75% senior unsecured notes due 2016 [Member]	Mar. 31, 2013 Debt repurchase date range, from January 15, 2014 to January 14, 2015 [Member] 7.75% senior unsecured notes due 2016 [Member]	Mar. 31, 2013 Debt repurchase date range, from January 15, 2014 to January 14, 2015 [Member] 8% senior unsecured notes due 2018 [Member]	Mar. 31, 2013 Debt repurchase date range, on or after January 15, 2015 [Member] 7.75% senior unsecured notes due 2016 [Member]	Mar. 31, 2013 Debt repurchase date range, from January 15, 2015 to January 14, 2016 [Member] 8% senior unsecured notes due 2018 [Member]	Mar. 31, 2013 Debt repurchase date range, on or after January 15, 2016 [Member] 8% senior unsecured notes due 2018 [Member]	Mar. 31, 2013 Debt repurchase percentage of principal amount authorized pursuant to additional requirements [Member] 7.75% senior unsecured notes due 2016 [Member]	Mar. 31, 2013 Debt repurchase percentage of principal amount authorized pursuant to additional requirements [Member] 8% senior unsecured notes due 2018 [Member]	Mar. 31, 2013 Debt repurchase percentage of principal amount authorized if change of control [Member] Initial Notes [Member]	Apr. 05, 2007 Minimum [Member] Variable Rate Senior Unsecured Convertible Notes [Member]	Apr. 05, 2007 Maximum [Member] Variable Rate Senior Unsecured Convertible Notes [Member]	Jan. 25, 2013 Repayment of Debt [Member] Variable Rate Senior Unsecured Convertible Notes [Member]	Jan. 25, 2013 Icahn Enterprises Holdings [Member] Repayment of Debt [Member] Variable Rate Senior Unsecured Convertible Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate														1.25%
Term Loan Facility				$ 200,000,000	$ 850,000,000	$ 1,150,000,000	$ 300,000,000			$ 1,000,000,000			$ 600,000,000
Interest rate, long-term debt					7.75%	8.00%
Gross proceeds from sale of senior unsecured notes		1,987,000,000						512,000,000	1,030,000,000
Redemption percentage of principal amount															103.875%	101.938%	104.00%	100.00%	102.00%	100.00%	107.75%	108.00%	101.00%
Redemption percentage of aggregate principal amount authorized to be redeemed at higher percenatge of principal amount			35.00%
Percentage of aggregate principal amount required to remain outstanding if debt redeemed at higher percenatge of principal amount			65.00%
Variable interest rate											4.00%													4.00%	5.50%
Variable rate notes, depositary unit, maximum dividends, per share, declared, before matching distribution to variable rate noteholders required											$ 0.10
Variable rate notes, distribution amount											0	0
Repayments of debt																										600,000,000	44,000,000
Additional indebtedness allowed per debt covenants	$ 2,400,000,000

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