Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	Icahn Enterprises Holdings	General partner	General partner Icahn Enterprises Holdings	Limited partners	Limited partners Icahn Enterprises Holdings	Total Partners' Equity	Total Partners' Equity Icahn Enterprises Holdings	Non-controlling Interests	Non-controlling Interests Icahn Enterprises Holdings
Equity at Dec. 31, 2017	$ 11,486	$ 11,513	$ (234)	$ (286)	$ 5,402	$ 5,481	$ 5,168	$ 5,195	$ 6,318	$ 6,318
Increase (Decrease) in Equity
Net loss	412	412	3	1	129	131	132	132	280	280
Other comprehensive loss	43	43	0	1	40	39	40	40	3	3
Distribution payable	(310)	(310)	(6)	(3)	(304)	(307)	(310)	(310)	0	0
Investment segment contributions	280	280	0	0	0	0	0	0	280	280
Dividends and distributions to non-controlling interests in subsidiaries	(31)	(31)	0	0	0	0	0	0	(31)	(31)
Cumulative effect adjustment from adoption of accounting principle	(29)	(29)	(1)	0	(28)	(29)	(29)	(29)	0	0
Changes in subsidiary equity and other	11	11	1	0	0	1	1	1	10	10
Equity at Mar. 31, 2018	11,862	11,889	(237)	(287)	5,239	5,316	5,002	5,029	6,860	6,860
Equity at Dec. 31, 2017	11,486	11,513	(234)	(286)	5,402	5,481	5,168	5,195	6,318	6,318
Increase (Decrease) in Equity
Net loss	989	990
Other comprehensive loss	(60)	(60)
Equity at Jun. 30, 2018	12,544	12,572	(228)	(283)	5,694	5,777	5,466	5,494	7,078	7,078
Equity at Mar. 31, 2018	11,862	11,889	(237)	(287)	5,239	5,316	5,002	5,029	6,860	6,860
Increase (Decrease) in Equity
Net loss	577	578	6	3	296	300	302	303	275	275
Other comprehensive loss	(103)	(103)	(1)	(1)	(93)	(93)	(94)	(94)	(9)	(9)
Distribution payable reversal	310	310	6	3	304	307	310	310	0	0
Partnership distributions	(48)	(48)	(1)	(1)	(47)	(47)	(48)	(48)	0	0
Dividends and distributions to non-controlling interests in subsidiaries	(47)	(47)	0	0	0	0	0	0	(47)	(47)
Changes in subsidiary equity and other	(7)	(7)	(1)	0	(5)	(6)	(6)	(6)	(1)	(1)
Equity at Jun. 30, 2018	12,544	12,572	(228)	(283)	5,694	5,777	5,466	5,494	7,078	7,078
Equity at Dec. 31, 2018	12,980	13,008	(790)	(864)	7,350	7,452	6,560	6,588	6,420	6,420
Increase (Decrease) in Equity
Net loss	(664)	(664)	(8)	(4)	(386)	(390)	(394)	(394)	(270)	(270)
Distribution payable	(391)	(391)	(8)	(4)	(383)	(387)	(391)	(391)	0	0
Dividends and distributions to non-controlling interests in subsidiaries	(30)	(30)	0	0	0	0	0	0	(30)	(30)
Changes in subsidiary equity and other	(243)	(243)	2	1	62	63	64	64	(307)	(307)
Equity at Mar. 31, 2019	11,652	11,680	(804)	(871)	6,643	6,738	5,839	5,867	5,813	5,813
Equity at Dec. 31, 2018	12,980	13,008	(790)	(864)	7,350	7,452	6,560	6,588	6,420	6,420
Increase (Decrease) in Equity
Net loss	(1,261)	(1,260)
Other comprehensive loss	1	1
Equity at Jun. 30, 2019	11,446	11,475	(807)	(872)	6,498	6,592	5,691	5,720	5,755	5,755
Equity at Mar. 31, 2019	11,652	11,680	(804)	(871)	6,643	6,738	5,839	5,867	5,813	5,813
Increase (Decrease) in Equity
Net loss	(597)	(596)	(10)	(5)	(488)	(492)	(498)	(497)	(99)	(99)
Other comprehensive loss	1	1	0	0	1	1	1	1	0	0
Distribution payable reversal	391	391	8	4	383	387	391	391	0	0
Partnership distributions	(55)	(55)	(1)	(1)	(54)	(54)	(55)	(55)	0	0
Partnership contributions	10	10	0	0	10	10	10	10	0	0
Investment segment contributions	70	70	0	0	0	0	0	0	70	70
Dividends and distributions to non-controlling interests in subsidiaries	(26)	(26)	0	0	0	0	0	0	(26)	(26)
Changes in subsidiary equity and other	0	0	0	1	3	2	3	3	(3)	(3)
Equity at Jun. 30, 2019	$ 11,446	$ 11,475	$ (807)	$ (872)	$ 6,498	$ 6,592	$ 5,691	$ 5,720	$ 5,755	$ 5,755