Condensed Statement of Operations By Reporting Segment (Details) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) reporting_segments	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Segment Reporting Information [Line Items]
Total assets		$ 37,278		$ 37,278		$ 35,780
Number of reporting segments | reporting_segments				10
Revenues:
Net sales		3,979	$ 4,867	$ 7,544	$ 9,533
Other revenues from operations		347	323	676	584
Net gain from investment activities		592	1,132	1,183	1,101
Interest and dividend income		47	44	100	103
Other (loss) income, net		19	13	(8)	48
Total Revenues		4,984	6,379	9,495	11,369
Expenses:
Cost of goods sold		3,324	4,327	6,449	8,469
Other expenses from operations		161	163	316	292
Selling, general and administrative		528	456	1,005	816
Restructuring		27	30	39	38
Impairment		3	1	4	2
Interest expense		287	197	557	367
Total Expenses		4,330	5,174	8,370	9,984
Income before income tax expense		654	1,205	1,125	1,385
Income tax expense		(113)	(82)	(162)	(185)
Net income		541	1,123	963	1,200
Less: net income attributable to non-controlling interests		(329)	(634)	(590)	(740)
Net income attributable to Icahn Enterprises		212	489	373	460
Supplemental information:
Capital expenditures		366	305	729	587
Depreciation and amortization	[1]	209	195	413	382
Amortization included in interest expense		3	3	6	13
Investment Segment [Member]
Segment Reporting Information [Line Items]
Total assets		16,104		16,104		15,460
Revenues:
Net sales		0	0	0	0
Other revenues from operations		0	0	0	0
Net gain from investment activities		609	1,159	1,179	1,149
Interest and dividend income		44	41	93	96
Other (loss) income, net		0	1	0	2
Total Revenues		653	1,201	1,272	1,247
Expenses:
Cost of goods sold		0	0	0	0
Other expenses from operations		0	0	0	0
Selling, general and administrative		130	88	230	110
Restructuring		0	0	0	0
Impairment		0	0	0	0
Interest expense		141	63	264	102
Total Expenses		271	151	494	212
Income before income tax expense		382	1,050	778	1,035
Income tax expense		0	0	0	0
Net income		382	1,050	778	1,035
Less: net income attributable to non-controlling interests		(206)	(549)	(418)	(529)
Net income attributable to Icahn Enterprises		176	501	360	506
Supplemental information:
Capital expenditures		0	0	0	0
Depreciation and amortization	[1]	0	0	0	0
Automotive Segment [Member]
Segment Reporting Information [Line Items]
Total assets		8,478		8,478		7,529
Revenues:
Net sales		2,016	1,872	3,851	3,651
Other revenues from operations		0	0	0	0
Net gain from investment activities		0	0	0	0
Interest and dividend income		2	1	3	2
Other (loss) income, net		26	(28)	35	(19)
Total Revenues		2,044	1,845	3,889	3,634
Expenses:
Cost of goods sold		1,706	1,574	3,290	3,080
Other expenses from operations		0	0	0	0
Selling, general and administrative		236	207	453	400
Restructuring		27	30	39	38
Impairment		3	1	4	2
Interest expense		34	32	70	57
Total Expenses		2,006	1,844	3,856	3,577
Income before income tax expense		38	1	33	57
Income tax expense		8	12	23	(28)
Net income		30	(11)	10	29
Less: net income attributable to non-controlling interests		(5)	(1)	(3)	(10)
Net income attributable to Icahn Enterprises		25	(12)	7	19
Supplemental information:
Capital expenditures		109	77	217	173
Depreciation and amortization	[1]	85	83	168	163
Energy Segment [Member]
Segment Reporting Information [Line Items]
Total assets		5,432		5,432		5,334
Revenues:
Net sales		1,624	2,541	3,013	4,988
Other revenues from operations		0	0	0	0
Net gain from investment activities		1	(3)	36	(3)
Interest and dividend income		0	1	1	1
Other (loss) income, net		(13)	36	(64)	145
Total Revenues		1,612	2,575	2,986	5,131
Expenses:
Cost of goods sold		1,332	2,358	2,569	4,605
Other expenses from operations		0	0	0	0
Selling, general and administrative		33	35	65	67
Restructuring		0	0	0	0
Impairment		0	0	0	0
Interest expense		12	8	24	18
Total Expenses		1,377	2,401	2,658	4,690
Income before income tax expense		235	174	328	441
Income tax expense		52	39	70	(102)
Net income		183	135	258	339
Less: net income attributable to non-controlling interests		(95)	(63)	(127)	(157)
Net income attributable to Icahn Enterprises		88	72	131	182
Supplemental information:
Capital expenditures		41	53	87	115
Depreciation and amortization	[1]	58	55	116	108
Metals Segment [Member]
Segment Reporting Information [Line Items]
Total assets		299		299		315
Revenues:
Net sales		103	188	209	377
Other revenues from operations		0	0	0	0
Net gain from investment activities		0	0	0	0
Interest and dividend income		0	0	0	0
Other (loss) income, net		3	(1)	3	0
Total Revenues		106	187	212	377
Expenses:
Cost of goods sold		110	191	226	383
Other expenses from operations		0	0	0	0
Selling, general and administrative		5	6	10	12
Restructuring		0	0	0	0
Impairment		0	0	0	0
Interest expense		0	0	0	0
Total Expenses		115	197	236	395
Income before income tax expense		(9)	(10)	(24)	(18)
Income tax expense		(4)	(5)	(10)	8
Net income		(5)	(5)	(14)	(10)
Less: net income attributable to non-controlling interests		0	0	0	0
Net income attributable to Icahn Enterprises		(5)	(5)	(14)	(10)
Supplemental information:
Capital expenditures		4	3	19	7
Depreciation and amortization	[1]	7	6	14	12
Railcar Segment [Member]
Segment Reporting Information [Line Items]
Total assets		3,414		3,414		3,120
Revenues:
Net sales		86	122	189	240
Other revenues from operations		124	101	241	194
Net gain from investment activities		0	0	0	0
Interest and dividend income		0	0	1	1
Other (loss) income, net		2	2	2	(3)
Total Revenues		212	225	433	432
Expenses:
Cost of goods sold		57	94	139	187
Other expenses from operations		52	44	100	87
Selling, general and administrative		8	10	19	22
Restructuring		0	0	0	0
Impairment		0	0	0	0
Interest expense		21	15	41	27
Total Expenses		138	163	299	323
Income before income tax expense		74	62	134	109
Income tax expense		18	15	34	(26)
Net income		56	47	100	83
Less: net income attributable to non-controlling interests		(20)	(17)	(37)	(32)
Net income attributable to Icahn Enterprises		36	30	63	51
Supplemental information:
Capital expenditures		168	148	330	250
Depreciation and amortization	[1]	32	25	61	51
Gaming Segment [Member]
Segment Reporting Information [Line Items]
Total assets		1,272		1,272		1,260
Revenues:
Net sales		0	0	0	0
Other revenues from operations		203	202	396	351
Net gain from investment activities		0	0	0	0
Interest and dividend income		0	0	0	1
Other (loss) income, net		0	1	(1)	38
Total Revenues		203	203	395	390
Expenses:
Cost of goods sold		0	0	0	0
Other expenses from operations		97	106	193	180
Selling, general and administrative		87	85	169	152
Restructuring		0	0	0	0
Impairment		0	0	0	0
Interest expense		3	3	6	6
Total Expenses		187	194	368	338
Income before income tax expense		16	9	27	52
Income tax expense		7	3	11	(13)
Net income		9	6	16	39
Less: net income attributable to non-controlling interests		(3)	(2)	(5)	(12)
Net income attributable to Icahn Enterprises		6	4	11	27
Supplemental information:
Capital expenditures		35	17	61	29
Depreciation and amortization	[1]	14	13	29	22
Mining Segment [Member]
Segment Reporting Information [Line Items]
Total assets		417		417		0
Revenues:
Net sales		6	0	6	0
Other revenues from operations		0	0	0	0
Net gain from investment activities		0	0	0	0
Interest and dividend income		0	0	0	0
Other (loss) income, net		(1)	0	(1)	0
Total Revenues		5	0	5	0
Expenses:
Cost of goods sold		6	0	6	0
Other expenses from operations		0	0	0	0
Selling, general and administrative		2	0	2	0
Restructuring		0	0	0	0
Impairment		0	0	0	0
Interest expense		1	0	1	0
Total Expenses		9	0	9	0
Income before income tax expense		(4)	0	(4)	0
Income tax expense		(2)	0	(2)	0
Net income		(6)	0	(6)	0
Less: net income attributable to non-controlling interests		2	0	2	0
Net income attributable to Icahn Enterprises		(4)	0	(4)	0
Supplemental information:
Capital expenditures		2	0	2	0
Depreciation and amortization	[1]	1	0	1	0
Food Packaging Segment [Member]
Segment Reporting Information [Line Items]
Total assets		432		432		436
Revenues:
Net sales		91	93	176	181
Other revenues from operations		0	0	0	0
Net gain from investment activities		0	0	0	0
Interest and dividend income		0	0	0	0
Other (loss) income, net		0	0	(3)	(15)
Total Revenues		91	93	173	166
Expenses:
Cost of goods sold		67	69	133	135
Other expenses from operations		0	0	0	0
Selling, general and administrative		11	11	23	22
Restructuring		0	0	0	0
Impairment		0	0	0	0
Interest expense		3	3	6	8
Total Expenses		81	83	162	165
Income before income tax expense		10	10	11	1
Income tax expense		4	4	5	(1)
Net income		6	6	6	0
Less: net income attributable to non-controlling interests		(2)	(2)	(2)	0
Net income attributable to Icahn Enterprises		4	4	4	0
Supplemental information:
Capital expenditures		5	5	9	10
Depreciation and amortization	[1]	4	6	9	11
Real Estate Segment [Member]
Segment Reporting Information [Line Items]
Total assets		740		740		745
Revenues:
Net sales		1	5	1	8
Other revenues from operations		20	20	39	39
Net gain from investment activities		0	0	0	0
Interest and dividend income		0	0	0	0
Other (loss) income, net		2	1	21	3
Total Revenues		23	26	61	50
Expenses:
Cost of goods sold		1	3	1	4
Other expenses from operations		12	13	23	25
Selling, general and administrative		2	3	5	6
Restructuring		0	0	0	0
Impairment		0	0	0	0
Interest expense		0	1	1	2
Total Expenses		15	20	30	37
Income before income tax expense		8	6	31	13
Income tax expense		0	0	0	0
Net income		8	6	31	13
Less: net income attributable to non-controlling interests		0	0	0	0
Net income attributable to Icahn Enterprises		8	6	31	13
Supplemental information:
Capital expenditures		1	1	1	1
Depreciation and amortization	[1]	6	5	11	11
Home Fashion Segment [Member]
Segment Reporting Information [Line Items]
Total assets		208		208		208
Revenues:
Net sales		52	46	99	88
Other revenues from operations		0	0	0	0
Net gain from investment activities		0	0	0	0
Interest and dividend income		0	0	0	0
Other (loss) income, net		0	0	0	1
Total Revenues		52	46	99	89
Expenses:
Cost of goods sold		45	38	85	75
Other expenses from operations		0	0	0	0
Selling, general and administrative		8	8	16	15
Restructuring		0	0	0	0
Impairment		0	0	0	0
Interest expense		0	0	0	0
Total Expenses		53	46	101	90
Income before income tax expense		(1)	0	(2)	(1)
Income tax expense		0	0	0	0
Net income		(1)	0	(2)	(1)
Less: net income attributable to non-controlling interests		0	0	0	0
Net income attributable to Icahn Enterprises		(1)	0	(2)	(1)
Supplemental information:
Capital expenditures		1	1	3	2
Depreciation and amortization	[1]	2	2	4	4
Holding Company [Member]
Segment Reporting Information [Line Items]
Total assets		482		482		1,373
Revenues:
Net sales		0	0	0	0
Other revenues from operations		0	0	0	0
Net gain from investment activities		(18)	(24)	(32)	(45)
Interest and dividend income		1	1	2	2
Other (loss) income, net		0	1	0	(104)
Total Revenues		(17)	(22)	(30)	(147)
Expenses:
Cost of goods sold		0	0	0	0
Other expenses from operations		0	0	0	0
Selling, general and administrative		6	3	13	10
Restructuring		0	0	0	0
Impairment		0	0	0	0
Interest expense		72	72	144	147
Total Expenses		78	75	157	157
Income before income tax expense		(95)	(97)	(187)	(304)
Income tax expense		26	14	27	(23)
Net income		(121)	(111)	(214)	(327)
Less: net income attributable to non-controlling interests		0	0	0	0
Net income attributable to Icahn Enterprises		(121)	(111)	(214)	(327)
Supplemental information:
Capital expenditures		0	0	0	0
Depreciation and amortization	[1]	0	0	0	0
Icahn Enterprises Holdings [Member]
Segment Reporting Information [Line Items]
Total assets		37,302		37,302		35,803
Revenues:
Net sales		3,979	4,867	7,544	9,533
Other revenues from operations		347	323	676	584
Net gain from investment activities		592	1,132	1,183	1,101
Interest and dividend income		47	44	100	103
Other (loss) income, net		19	13	(8)	48
Total Revenues		4,984	6,379	9,495	11,369
Expenses:
Cost of goods sold		3,324	4,327	6,449	8,469
Other expenses from operations		161	163	316	292
Selling, general and administrative		528	456	1,005	816
Restructuring		27	30	39	38
Impairment		3	1	4	2
Interest expense		286	196	556	366
Total Expenses		4,329	5,173	8,369	9,983
Income before income tax expense		655	1,206	1,126	1,386
Income tax expense		(113)	(82)	(162)	(185)
Net income		542	1,124	964	1,201
Less: net income attributable to non-controlling interests		(329)	(634)	(590)	(740)
Net income attributable to Icahn Enterprises		213	490	374	461
Supplemental information:
Amortization included in interest expense		2	2	5	12
Icahn Enterprises Holdings [Member] | Investment Segment [Member]
Segment Reporting Information [Line Items]
Total assets		16,104		16,104		15,460
Expenses:
Interest expense		141	63	264	102
Net income		382	1,050	778	1,035
Net income attributable to Icahn Enterprises		176	501	360	506
Icahn Enterprises Holdings [Member] | Automotive Segment [Member]
Segment Reporting Information [Line Items]
Total assets		8,478		8,478		7,529
Expenses:
Interest expense		34	32	70	57
Net income		30	(11)	10	29
Net income attributable to Icahn Enterprises		25	(12)	7	19
Icahn Enterprises Holdings [Member] | Energy Segment [Member]
Segment Reporting Information [Line Items]
Total assets		5,432		5,432		5,334
Expenses:
Interest expense		12	8	24	18
Net income		183	135	258	339
Net income attributable to Icahn Enterprises		88	72	131	182
Icahn Enterprises Holdings [Member] | Metals Segment [Member]
Segment Reporting Information [Line Items]
Total assets		299		299		315
Expenses:
Interest expense		0	0	0	0
Net income		(5)	(5)	(14)	(10)
Net income attributable to Icahn Enterprises		(5)	(5)	(14)	(10)
Icahn Enterprises Holdings [Member] | Railcar Segment [Member]
Segment Reporting Information [Line Items]
Total assets		3,414		3,414		3,120
Expenses:
Interest expense		21	15	41	27
Net income		56	47	100	83
Net income attributable to Icahn Enterprises		36	30	63	51
Icahn Enterprises Holdings [Member] | Gaming Segment [Member]
Segment Reporting Information [Line Items]
Total assets		1,272		1,272		1,260
Expenses:
Interest expense		3	3	6	6
Net income		9	6	16	39
Net income attributable to Icahn Enterprises		6	4	11	27
Icahn Enterprises Holdings [Member] | Mining Segment [Member]
Segment Reporting Information [Line Items]
Total assets		417		417		0
Expenses:
Interest expense		1	0	1	0
Net income		(6)	0	(6)	0
Net income attributable to Icahn Enterprises		(4)	0	(4)	0
Icahn Enterprises Holdings [Member] | Food Packaging Segment [Member]
Segment Reporting Information [Line Items]
Total assets		432		432		436
Expenses:
Interest expense		3	3	6	8
Net income		6	6	6	0
Net income attributable to Icahn Enterprises		4	4	4	0
Icahn Enterprises Holdings [Member] | Real Estate Segment [Member]
Segment Reporting Information [Line Items]
Total assets		740		740		745
Expenses:
Interest expense		0	1	1	2
Net income		8	6	31	13
Net income attributable to Icahn Enterprises		8	6	31	13
Icahn Enterprises Holdings [Member] | Home Fashion Segment [Member]
Segment Reporting Information [Line Items]
Total assets		208		208		208
Expenses:
Interest expense		0	0	0	0
Net income		(1)	0	(2)	(1)
Net income attributable to Icahn Enterprises		(1)	0	(2)	(1)
Icahn Enterprises Holdings [Member] | Holding Company [Member]
Segment Reporting Information [Line Items]
Total assets		506		506		$ 1,396
Expenses:
Interest expense		71	71	143	146
Net income		(120)	(110)	(213)	(326)
Net income attributable to Icahn Enterprises		$ (120)	$ (110)	$ (213)	$ (326)

[1] Excludes amounts related to the amortization of deferred financing costs and debt discounts and premiums included in interest expense in the amounts of $3 million and $3 million for the three months ended June 30, 2015 and 2014, respectively, and $6 million and $13 million for the six months ended June 30, 2015 and 2014, respectively.