Net Income Per LP Unit (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended		0 Months Ended
	Feb. 20, 2015	Mar. 31, 2015	Mar. 31, 2014	Apr. 22, 2015	May 06, 2015
Earnings Per LP Unit [Line Items]
Net income (loss) attributable to Icahn Enterprises		$ 161	$ (29)
Net income (loss) attributable to Icahn Enterprises allocable to limited partners (98.01% allocation)		158	(28)
Basic income (loss) per LP unit		$ 1.28	$ (0.24)
Basic weighted average LP units outstanding		123,000,000	117,000,000
Dilutive effect of unit distribution declared (income)		0
Dilutive effect of unit distribution declared (units)		1,000,000
Diluted income (loss) per LP unit		$ 1.27	$ (0.24)
Diluted weighted average LP units outstanding		124,000,000	117,000,000
Distribution declared per depositary unit	$ 1.50
Depositary units [Member]
Earnings Per LP Unit [Line Items]
Distribution payable		$ 188
Mr. Icahn and his affiliates [Member]
Earnings Per LP Unit [Line Items]
Affiliate ownership interest in Icahn Enterprises		88.40%
Unit distribution [Member] | Depositary units [Member]
Earnings Per LP Unit [Line Items]
Distribution Made to Limited Partner, Unit Distribution				1,713,935
Ownership percentage [Member] | Mr. Icahn and his affiliates [Member]
Earnings Per LP Unit [Line Items]
Affiliate ownership interest in Icahn Enterprises					88.50%