Net Income Per LP Unit (Details) - USD ($) $ / shares in Units, $ in Millions								3 Months Ended		9 Months Ended
	Nov. 05, 2015	Sep. 28, 2015	Jul. 30, 2015	Jun. 30, 2015	May. 05, 2015	Apr. 22, 2015	Feb. 20, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per LP Unit [Line Items]
Net (loss) income attributable to Icahn Enterprises								$ (440)	$ (355)	$ (67)	$ 105
Net (loss) income attributable to Icahn Enterprises allocable to limited partners (98.01% allocation)								$ (432)	$ (348)	$ (66)	$ 103
Basic and diluted (loss) income per LP unit								$ (3.40)	$ (2.90)	$ (0.53)	$ 0.87
Basic and diluted weighted average LP units outstanding								127,000,000	120,000,000	125,000,000	118,000,000
Distribution declared per depositary unit			$ 1.50		$ 1.50		$ 1.50
Depositary units [Member]
Earnings Per LP Unit [Line Items]
Distribution Made to Limited Partner, Unit Distribution		2,309,812		1,825,930		1,713,935
Mr. Icahn and his affiliates [Member]
Earnings Per LP Unit [Line Items]
Affiliate ownership interest in Icahn Enterprises										88.80%
Ownership percentage [Member] | Mr. Icahn and his affiliates [Member]
Earnings Per LP Unit [Line Items]
Affiliate ownership interest in Icahn Enterprises	88.80%