Net Income Per LP Unit (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended				9 Months Ended				0 Months Ended					0 Months Ended	3 Months Ended	9 Months Ended		0 Months Ended	9 Months Ended	0 Months Ended		9 Months Ended		0 Months Ended				3 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Oct. 09, 2013 Depositary units [Member]	Jul. 05, 2013 Depositary units [Member]	Apr. 16, 2013 Depositary units [Member]	Feb. 11, 2013 Depositary units [Member]	Sep. 30, 2013 Depositary units [Member]	Nov. 30, 2012 Depositary Units [Member]	Sep. 30, 2012 Depositary Units [Member]	Sep. 30, 2012 Depositary Units [Member]	Sep. 30, 2013 Icahn Enterprises G.P. [Member]	Aug. 05, 2013 Principal Owners and Affiliates [Member]	Sep. 30, 2013 Principal Owners and Affiliates [Member]	Jun. 12, 2013 Limited partners Depositary units [Member]	Feb. 28, 2013 Limited partners Depositary units [Member]	Sep. 30, 2013 Limited partners Depositary units [Member]	Sep. 30, 2013 General partner	Nov. 02, 2012 Dividend Declared [Member] Depositary Units [Member]	Nov. 01, 2013 Dividend Declared [Member] Limited partners Depositary units [Member]	Aug. 06, 2013 Dividend Declared [Member] Limited partners Depositary units [Member]	Apr. 29, 2013 Dividend Declared [Member] Limited partners Depositary units [Member]	Sep. 30, 2012 Convertible Debt [Member]
Earnings Per LP Unit [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount																												5,000,000
Net income attributable to Icahn Enterprises	$ 472		$ 84		$ 803		$ 390
Less: Net income attributable to Icahn Enterprises allocable to general partner(1)	0	[1]	(6)	[1]	0	[1]	(9)	[1]
Net income attributable to Icahn Enterprises net of portion allocable 100% to general partner	472		78		803		381
Net income attributable to Icahn Enterprises allocable to limited partners (98.01% allocation)	463		77		787		374
Basic income per LP unit	$ 4.13		$ 0.75		$ 7.22		$ 3.70
Basic weighted average LP units outstanding	112,000,000		103,000,000		109,000,000		101,000,000
Dilutive effect of variable rate convertible notes (income)			0		2		17
Dilutive effect of variable rate convertible notes (units)			0		1,000,000		5,000,000
Dilutive effect of unit distribution declared (income)	0				0
Dilutive effect of unit distribution declared (units)	1,000,000				0
Diluted income per LP unit	$ 4.10		$ 0.75		$ 7.17		$ 3.69
Diluted weighted average LP units outstanding	113,000,000		103,000,000		110,000,000		106,000,000
Units issues in connection with equity offering (ones)																				1,600,000	3,174,604
Equity offering per share amount (ones)																				$ 75.54	$ 63.00
Underwriter option to purchase additional depositary units																				240,000	476,191
Proceeds from equity offering					1,308		0															311
Proceeds from equity offerings					317		513																6
General partner ownership percentage in Icahn Enterprises																	1.00%
Distribution declared per depositary unit												$ 1.00													$ 1.25	$ 1.25	$ 1.00
Distribution Made to Limited Partner, Unit Distribution									1,515,739	1,237,191	1,521,946
Affiliate ownership interest in Icahn Enterprises																		89.40%	89.40%
Distribution payable													$ 140
Distribution Made to Unitholder, Quarterly Distributions Declared, Per Unit																								$ 0.35
Distribution Made to Limited Partner, Distributions Declared, Per Unit																								$ 0.10
Distribution Made to Unitholder, Unit Distributions Declared, Per Unit																								$ 0.25
Distribution Made to Unitholder, Unit Distributions Ratio																								0.005978
Distribution Made to Limited Liability Company (LLC) Member, Unit Distribution														621,064
Impact of Unit Distributions on Restatement of Earnings Per Share															$ 0	$ 0.04
Impact of Unit Distributions on Restatement of Earnings Per Share, Diluted																$ 0.03

[1] Amount represents net income allocable to the general partner for the period May 5, 2012 through September 30, 2012, the period in which Mr. Icahn and his affiliates' ownership in IEP Energy, other than Icahn Enterprises' ownership, were considered under common control. On August 24, 2012, Mr. Icahn and his affiliates contributed this interest to us in exchange for our depositary units.