Consolidated Statement of Changes in Equity (USD $) In Millions, unless otherwise specified	Total	General partner	Limited partners	Total Partners' Equity	Non-controlling Interests	Icahn Enterprises Holdings [Member]	Icahn Enterprises Holdings [Member] General partner	Icahn Enterprises Holdings [Member] Limited partners	Icahn Enterprises Holdings [Member] Total Partners' Equity	Icahn Enterprises Holdings [Member] Non-controlling Interests
Equity at Dec. 31, 2012	$ 9,816	$ (244)	$ 4,913	$ 4,669	$ 5,147	$ 9,838	$ (293)	$ 4,984	$ 4,691	$ 5,147
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	2,039	16	787	803	1,236	2,039	8	795	803	1,236
Other comprehensive income	(20)	0	(13)	(13)	(7)	(20)	0	(13)	(13)	(7)
Partnership distributions	(172)	(3)	(169)	(172)	0	(172)	(2)	(170)	(172)	0
Investment segment contributions	45	0	0	0	45	45	0	0	0	45
Proceeds from equity offerings	317	6	311	317	0	317	6	311	317	0
Distributions to non-controlling interests in subsidiaries	(342)	0	0	0	(342)	(342)	0	0	0	(342)
Subsidiary equity offering	1,054	2	88	90	964	1,054	1	89	90	964
Changes in subsidiary equity and other	1	0	26	26	(25)	1	0	26	26	(25)
Equity at Sep. 30, 2013	12,738	(223)	5,943	5,720	7,018	12,760	(280)	6,022	5,742	7,018
Equity at Jun. 30, 2013
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	1,236					1,236
Other comprehensive income	52					52
Equity at Sep. 30, 2013	12,738					12,760
Equity at Dec. 31, 2013	13,309	(216)	6,308	6,092	7,217	13,331	(279)	6,393	6,114	7,217
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	573	2	103	105	468	574	1	105	106	468
Other comprehensive income	(118)	(2)	(89)	(91)	(27)	(118)	(1)	(90)	(91)	(27)
Partnership distributions	(96)	(2)	(94)	(96)	0	(96)	(1)	(95)	(96)	0
Investment segment contributions	500	0	0	0	500	500	0	0	0	500
Proceeds from equity offerings	0					0
Distributions to non-controlling interests in subsidiaries	(595)	0	0	0	(595)	(595)	0	0	0	(595)
Subsidiary equity offering	160	0	10	10	150	160	0	10	10	150
Changes in subsidiary equity and other	139	3	136	139	0	139	1	138	139	0
Equity at Sep. 30, 2014	13,872	(215)	6,374	6,159	7,713	13,895	(279)	6,461	6,182	7,713
Equity at Jun. 30, 2014
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	(627)					(627)
Other comprehensive income	(123)					(123)
Equity at Sep. 30, 2014	$ 13,872					$ 13,895