Consolidated Statement of Changes in Equity (USD $) In Millions, except Share data, unless otherwise specified	Total	General partner	Limited partners	Held in Treasury	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, 2011	$ 7,871	$ (271)	$ 4,038	$ (12)	$ 3,755	$ 4,116	$ 7,892	$ (311)	$ 4,087	$ 3,776	$ 4,116
Treasury units at Dec. 31, 2011	1,137,200us-gaap_TreasuryStockShares
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	762us-gaap_ProfitLoss	17	379	0	396	366	763	13	384	397	366
Other comprehensive income	(127)	(2)	(96)	0	(98)	(29)	(127)	(1)	(97)	(98)	(29)
Cancellation of treasury units	0	0	(12)	12	0	0
Cancellation of treasury units				(1,137,200)
Partnership contributions	513	13	500	0	513	0	513	6	507	513	0
Partnership distributions	(41)	(1)	(40)	0	(41)	0	(41)	0	(41)	(41)	0
Investment segment distributions	(79)iep_InvestmentManagementDistributions	0	0	0	0	(79)	(79)	0	0	0	(79)
Distributions paid to non-controlling interests in subsidiary	(30)	0	0	0	0	(30)	(30)	0	0	0	(30)
Acquisition of CVR	984	0	135	0	135	849	984	0	135	135	849
Changes in subsidiary equity and other	(37)iep_ChangeInSubsidiaryEquityAndOther	0	9	0	9	(46)	(37)	0	9	9	(46)
Equity at Dec. 31, 2012	9,816	(244)	4,913	0	4,669	5,147	9,838	(293)	4,984	4,691	5,147
Held in Treasury at Dec. 31, 2012	0us-gaap_TreasuryStockShares
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	2,444us-gaap_ProfitLoss	20	1,005	0	1,025	1,419	2,444	10	1,015	1,025	1,419
Other comprehensive income	177	3	130	0	133	44	177	2	131	133	44
Acquisition of ARL	(242)	(5)	(237)	0	(242)	0	(242)	(3)	(239)	(242)
Partnership contributions	593	12	581	0	593	0	593	6	587	593	0
Partnership distributions	(51)	(1)	(50)	0	(51)	0	(51)	(1)	(50)	(51)	0
Investment segment contributions	46iep_InvestmentManagementContributions	0	0	0	0	46	46	0	0	0	46
Distributions paid to non-controlling interests in subsidiary	(379)	0	0	0	0	(379)	(379)	0	0	0	(379)
Proceeds from subsidiary equity offerings	1,056	2	88	0	90	966	1,056	1	89	90	966
Changes in subsidiary equity and other	(151)iep_ChangeInSubsidiaryEquityAndOther	(3)	(122)	0	(125)	(26)	(151)	(1)	(124)	(125)	(26)
Equity at Dec. 31, 2013	13,309	(216)	6,308	0	6,092	7,217	13,331	(279)	6,393	6,114	7,217
Held in Treasury at Dec. 31, 2013	0us-gaap_TreasuryStockShares
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	(529)us-gaap_ProfitLoss	(7)	(366)	0	(373)	(156)	(528)	(4)	(368)	(372)	(156)
Other comprehensive income	(488)	(8)	(358)	0	(366)	(122)	(488)	(3)	(363)	(366)	(122)
Partnership distributions	(125)	(2)	(123)	0	(125)	0	(125)	(1)	(124)	(125)	0
Investment segment contributions	500iep_InvestmentManagementContributions	0	0	0	0	500	500	0	0	0	500
Distributions paid to non-controlling interests in subsidiary	(642)	0	0	0	0	(642)	(642)	0	0	0	(642)
Proceeds from subsidiary equity offerings	160	0	10	0	10	150	160	0	10	10	150
Changes in subsidiary equity and other	205iep_ChangeInSubsidiaryEquityAndOther	4	201	0	205	0	205	2	203	205	0
Equity at Dec. 31, 2014	$ 12,390	$ (229)	$ 5,672	$ 0	$ 5,443	$ 6,947	$ 12,413	$ (285)	$ 5,751	$ 5,466	$ 6,947
Held in Treasury at Dec. 31, 2014				0

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Contributions from non-controlling investors in the Private Funds.

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Increase in noncontrolling interest balance because of a business combination that occurred during the period.

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Total contributions made by each class of partners (i.e., general, limited and preferred partners).

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Amount of decrease of par value, additional paid in capital (APIC) and retained earnings of common and preferred stock retired from treasury when treasury stock is accounted for under the cost method.

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