Condensed Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total	General partner	Limited partners	Parent [Member]	Non-controlling Interests	Icahn Enterprises Holdings [Member]	Icahn Enterprises Holdings [Member] General partner	Icahn Enterprises Holdings [Member] Limited partners	Icahn Enterprises Holdings [Member] Parent [Member]	Icahn Enterprises Holdings [Member] Non-controlling Interests
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 (loss) income	573	2	103	105	468	574	1	105	106	468
Other comprehensive loss	(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
Distributions to non-controlling interests in subsidiaries	(595)	0	0	0	(595)	(595)	0	0	0	(595)
Proceeds from subsidiary equity offerings	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 Dec. 31, 2014	12,390	(229)	5,672	5,443	6,947	12,413	(285)	5,751	5,466	6,947
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	23	(1)	(66)	(67)	90	24	(1)	(65)	(66)	90
Other comprehensive loss	(167)	(3)	(127)	(130)	(37)	(167)	(1)	(129)	(130)	(37)
Partnership distributions	(87)	(2)	(85)	(87)	0	(87)	(1)	(86)	(87)	0
Investment segment contributions	246	0	0	0	246	246	0	0	0	246
Distributions to non-controlling interests in subsidiaries	(190)	0	0	0	(190)	(192)	0	0	0	(192)
Proceeds from subsidiary equity offerings	31	0	0	0	31	31	0	0	0	31
Acquisitions	90	0	0	0	90	90	0	0	0	90
Changes in subsidiary equity and other	(50)	0	(19)	(19)	(31)	(48)	0	(19)	(19)	(29)
Equity at Sep. 30, 2015	$ 12,286	$ (235)	$ 5,375	$ 5,140	$ 7,146	$ 12,310	$ (288)	$ 5,452	$ 5,164	$ 7,146