Net Income Per LP Unit (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended				0 Months Ended				6 Months Ended	0 Months Ended	6 Months Ended	0 Months Ended		6 Months Ended		0 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Jul. 05, 2013 Depositary units [Member]	Apr. 16, 2013 Depositary units [Member]	Feb. 11, 2013 Depositary units [Member]	Jun. 30, 2013 Depositary units [Member]	Jun. 30, 2013 Icahn Enterprises G.P. [Member]	Aug. 05, 2013 Principal Owners and Affiliates [Member]	Jun. 30, 2013 Principal Owners and Affiliates [Member]	Jun. 12, 2013 Limited partners Depositary units [Member]	Feb. 28, 2013 Limited partners Depositary units [Member]	Jun. 30, 2013 Limited partners Depositary units [Member]	Jun. 30, 2013 General partner	Aug. 06, 2013 Dividend Declared [Member] Limited partners Depositary units [Member]	Apr. 29, 2013 Dividend Declared [Member] Limited partners Depositary units [Member]
Earnings Per LP Unit [Line Items]
Net income attributable to Icahn Enterprises	$ 54		$ 257		$ 331		$ 306
Less: Net income attributable to Icahn Enterprises allocable to general partner(1)	0	[1]	(3)	[1]	0	[1]	(3)	[1]
Net income attributable to Icahn Enterprises net of portion allocable 100% to general partner	54		254		331		303
Net income attributable to Icahn Enterprises allocable to limited partners (98.01% allocation)	53		249		324		297
Basic income per LP unit	$ 0.48		$ 2.44		$ 3.00		$ 2.97
Basic weighted average LP units outstanding	110,000,000		102,000,000		108,000,000		100,000,000
Dilutive effect of variable rate convertible notes (income)			5		2		11
Dilutive effect of variable rate convertible notes (units)			5,000,000		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	$ 0.48		$ 2.37		$ 2.99		$ 2.93
Diluted weighted average LP units outstanding	111,000,000		107,000,000		109,000,000		105,000,000
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					1,242		0											311
Proceeds from equity offerings					317		510												6
General partner ownership percentage in Icahn Enterprises													1.00%
Distribution declared per depositary unit											$ 1.00									$ 1.25	$ 1.00
Distribution Made to Limited Partner, Unit Distribution									1,237,191	1,521,946
Affiliate ownership interest in Icahn Enterprises														89.40%	89.30%
Distribution payable												$ 110

[1] Amount represents net income allocable to the general partner for the period May 5, 2012 through June 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.