Net Income Per LP Unit (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended		0 Months Ended				9 Months Ended		0 Months Ended			9 Months Ended		0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 25, 2014 Depositary units [Member]	Jun. 30, 2014 Depositary units [Member]	Apr. 22, 2014 Depositary units [Member]	Feb. 25, 2014 Depositary units [Member]	Sep. 30, 2014 Icahn Enterprises G.P. [Member]	Sep. 30, 2014 Principal Owners and Affiliates [Member]	Jul. 31, 2014 Limited partners Depositary units [Member]	May 05, 2014 Limited partners Depositary units [Member]	Feb. 28, 2013 Limited partners Depositary units [Member]	Sep. 30, 2014 Limited partners Depositary units [Member]	Sep. 30, 2014 General partner	Nov. 03, 2014 Partnership Interest [Member] Principal Owners and Affiliates [Member]
Earnings Per LP Unit [Line Items]
Net (loss) income attributable to Icahn Enterprises	$ (355)	$ 472	$ 105	$ 803
Net (loss) income attributable to Icahn Enterprises allocable to limited partners (98.01% allocation)	(348)	463	103	787
Basic (loss) income per LP unit	$ (2.90)	$ 4.13	$ 0.87	$ 7.22
Basic weighted average LP units outstanding	120,000,000	112,000,000	118,000,000	109,000,000
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities				2
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities				1,000,000
Dilutive effect of unit distribution declared (income)		0		0
Dilutive effect of unit distribution declared (units)		1,000,000		0
Diluted (loss) income per LP unit	$ (2.90)	$ 4.10	$ 0.87	$ 7.17
Diluted weighted average LP units outstanding	120,000,000	113,000,000	118,000,000	110,000,000
Units issues in connection with equity offering (ones)													3,174,604
Equity offering per share amount (ones)													$ 63.00
Underwriter option to purchase additional depositary units													476,191
Proceeds from equity offering			188	1,308										194
Proceeds from equity offerings			$ 0	$ 317											$ 4
General partner ownership percentage in Icahn Enterprises									1.00%
Distribution declared per depositary unit								$ 1.50			$ 1.50	$ 1.50
Distribution Made to Limited Partner, Unit Distribution					1,446,074	1,555,003	1,574,448
Affiliate ownership interest in Icahn Enterprises										88.30%						88.30%