Net Income Per LP Unit (Details) - USD ($) $ / shares in Units, $ in Millions										3 Months Ended		9 Months Ended
	Nov. 02, 2016	Nov. 01, 2016	Sep. 19, 2016	Aug. 03, 2016	Jun. 16, 2016	Apr. 29, 2016	Apr. 12, 2016	Feb. 29, 2016	Feb. 23, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per LP Unit [Line Items]
Net (loss) income attributable to Icahn Enterprises										$ (16)	$ (440)	$ (922)	$ (67)
Net (loss) income attributable to Icahn Enterprises allocable to limited partners (98.01% allocation)										$ (16)	$ (432)	$ (904)	$ (66)
Basic (loss) income per LP unit										$ (0.12)	$ (3.40)	$ (6.70)	$ (0.53)
Basic weighted average LP units outstanding										139,000,000	127,000,000	135,000,000	125,000,000
Diluted (loss) income per LP unit										$ (0.12)	$ (3.40)	$ (6.70)	$ (0.53)
Diluted weighted average LP units outstanding										139,000,000	127,000,000	135,000,000	125,000,000
Distribution made to limited partners, Unit distribution			3,586,029		3,116,976		2,824,186
Distribution declared per depositary unit				$ 1.50		$ 1.50			$ 1.50
Mr. Icahn and his affiliates [Member]
Earnings Per LP Unit [Line Items]
Affiliate ownership interest in Icahn Enterprises												89.70%
Subsequent Event [Member]
Earnings Per LP Unit [Line Items]
Distribution declared per depositary unit		$ 1.50
Subsequent Event [Member] | Mr. Icahn and his affiliates [Member]
Earnings Per LP Unit [Line Items]
Affiliate ownership interest in Icahn Enterprises	89.70%
Railcar Segment [Member]
Earnings Per LP Unit [Line Items]
Net (loss) income attributable to Icahn Enterprises										$ 18	$ 35	$ 98	$ 98
ARL [Member] | Railcar Segment [Member]
Earnings Per LP Unit [Line Items]
LP units issued as consideration for acquisition								685,367