Condensed Consolidated Statements 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, 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	963	7	366	373	590	964	4	370	374	590
Other comprehensive income	(80)	(1)	(61)	(62)	(18)	(80)	(1)	(61)	(62)	(18)
Partnership distributions	(58)	(1)	(57)	(58)	0	(58)	(1)	(57)	(58)	0
Investment segment contributions	245	0	0	0	245	245	0	0	0	245
Dividends and distributions to non-controlling interests in subsidiaries	(115)	0	0	0	(115)	(115)	0	0	0	(115)
Acquisitions	65	0	0	0	65	65	0	0	0	65
Proceeds from subsidiary equity offering	31	0	0	0	31	31	0	0	0	31
Changes in subsidiary equity and other	1	0	(9)	(9)	10	1	0	(9)	(9)	10
Equity at Jun. 30, 2015	13,442	(224)	5,911	5,687	7,755	13,466	(283)	5,994	5,711	7,755
Equity at Dec. 31, 2015	10,033	(257)	4,244	3,987	6,046	10,057	(299)	4,310	4,011	6,046
Increase (Decrease) in Partners' Capital [Roll Forward]
Net loss	(1,894)	(18)	(888)	(906)	(988)	(1,893)	(9)	(896)	(905)	(988)
Other comprehensive income	(2)	0	(6)	(6)	4	(2)	0	(6)	(6)	4
Partnership distributions	(54)	(1)	(53)	(54)	0	(54)	(1)	(53)	(54)	0
Partnership contribution	1	1	0	1	0	1	1	0	1	0
Investment segment contributions	490	0	0	0	490	490	0	0	0	490
Dividends and distributions to non-controlling interests in subsidiaries	(51)	0	0	0	(51)	(51)	0	0	0	(51)
Acquisitions	60	(11)	(519)	(530)	590	60	(5)	(525)	(530)	590
LP unit issuance	35	0	35	35	0	35	0	35	35	0
Changes in subsidiary equity and other	(20)	0	(1)	(1)	(19)	(20)	0	(1)	(1)	(19)
Equity at Jun. 30, 2016	$ 8,598	$ (286)	$ 2,812	$ 2,526	$ 6,072	$ 8,623	$ (313)	$ 2,864	$ 2,551	$ 6,072