Condensed Statement of Operations By Reporting Segment (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Revenues:
Net sales		$ 3,548	$ 3,565
Other revenues from operations		446	329
Net gain from investment activities		(936)	591
Interest and dividend income		42	53
Other (loss) income, net		27	(27)
Total Revenues		3,127	4,511
Expenses:
Cost of goods sold		3,123	3,125
Other expenses from operations		246	155
Selling, general and administrative		518	477
Restructuring		15	12
Impairment		577	1
Interest expense		241	270
Total Expenses		4,720	4,040
Income before income tax expense		(1,593)	471
Income tax expense		(16)	(49)
Net (loss) income		(1,609)	422
Less: net loss (income) attributable to non-controlling interests		772	(261)
Net (loss) income attributable to Icahn Enterprises		(837)	161
Supplemental information:
Capital expenditures		210	363
Depreciation and amortization	[1]	230	204
Amortization included in interest expense		4	3
Investment Segment [Member]
Revenues:
Net sales		0	0
Other revenues from operations		0	0
Net gain from investment activities		(945)	570
Interest and dividend income		38	49
Other (loss) income, net		(1)	0
Total Revenues		(908)	619
Expenses:
Cost of goods sold		0	0
Other expenses from operations		0	0
Selling, general and administrative		(12)	100
Restructuring		0	0
Impairment		0	0
Interest expense		87	123
Total Expenses		75	223
Income before income tax expense		(983)	396
Income tax expense		0	0
Net (loss) income		(983)	396
Less: net loss (income) attributable to non-controlling interests		533	(212)
Net (loss) income attributable to Icahn Enterprises		(450)	184
Supplemental information:
Capital expenditures		0	0
Depreciation and amortization	[1]	0	0
Automotive Segment [Member]
Revenues:
Net sales		2,321	1,835
Other revenues from operations		80	0
Net gain from investment activities		0	0
Interest and dividend income		1	1
Other (loss) income, net		24	9
Total Revenues		2,426	1,845
Expenses:
Cost of goods sold		1,912	1,584
Other expenses from operations		76	0
Selling, general and administrative		350	217
Restructuring		15	12
Impairment		3	1
Interest expense		39	36
Total Expenses		2,395	1,850
Income before income tax expense		31	(5)
Income tax expense		3	(15)
Net (loss) income		28	(20)
Less: net loss (income) attributable to non-controlling interests		(7)	2
Net (loss) income attributable to Icahn Enterprises		21	(18)
Supplemental information:
Capital expenditures		99	108
Depreciation and amortization	[1]	104	83
Energy Segment [Member]
Revenues:
Net sales		906	1,389
Other revenues from operations		0	0
Net gain from investment activities		0	35
Interest and dividend income		0	1
Other (loss) income, net		(1)	(51)
Total Revenues		905	1,374
Expenses:
Cost of goods sold		927	1,237
Other expenses from operations		0	0
Selling, general and administrative		35	32
Restructuring		0	0
Impairment		574	0
Interest expense		11	12
Total Expenses		1,547	1,281
Income before income tax expense		(642)	93
Income tax expense		(28)	(18)
Net (loss) income		(614)	75
Less: net loss (income) attributable to non-controlling interests		261	(32)
Net (loss) income attributable to Icahn Enterprises		(353)	43
Supplemental information:
Capital expenditures		48	46
Depreciation and amortization	[1]	56	58
Metals Segment [Member]
Revenues:
Net sales		58	106
Other revenues from operations		0	0
Net gain from investment activities		0	0
Interest and dividend income		0	0
Other (loss) income, net		0	0
Total Revenues		58	106
Expenses:
Cost of goods sold		64	116
Other expenses from operations		0	0
Selling, general and administrative		4	5
Restructuring		0	0
Impairment		0	0
Interest expense		0	0
Total Expenses		68	121
Income before income tax expense		(10)	(15)
Income tax expense		(4)	6
Net (loss) income		(6)	(9)
Less: net loss (income) attributable to non-controlling interests		0	0
Net (loss) income attributable to Icahn Enterprises		(6)	(9)
Supplemental information:
Capital expenditures		1	15
Depreciation and amortization	[1]	6	7
Railcar Segment [Member]
Revenues:
Net sales		124	103
Other revenues from operations		132	117
Net gain from investment activities		0	0
Interest and dividend income		1	1
Other (loss) income, net		2	0
Total Revenues		259	221
Expenses:
Cost of goods sold		102	82
Other expenses from operations		54	48
Selling, general and administrative		12	11
Restructuring		0	0
Impairment		0	0
Interest expense		23	20
Total Expenses		191	161
Income before income tax expense		68	60
Income tax expense		18	(16)
Net (loss) income		50	44
Less: net loss (income) attributable to non-controlling interests		(14)	(17)
Net (loss) income attributable to Icahn Enterprises		36	27
Supplemental information:
Capital expenditures		39	162
Depreciation and amortization	[1]	34	29
Gaming Segment [Member]
Revenues:
Net sales		0	0
Other revenues from operations		218	193
Net gain from investment activities		0	0
Interest and dividend income		0	0
Other (loss) income, net		0	(1)
Total Revenues		218	192
Expenses:
Cost of goods sold		0	0
Other expenses from operations		106	96
Selling, general and administrative		97	82
Restructuring		0	0
Impairment		0	0
Interest expense		3	3
Total Expenses		206	181
Income before income tax expense		12	11
Income tax expense		6	(4)
Net (loss) income		6	7
Less: net loss (income) attributable to non-controlling interests		(3)	(2)
Net (loss) income attributable to Icahn Enterprises		3	5
Supplemental information:
Capital expenditures		16	26
Depreciation and amortization	[1]	17	15
Mining segment [Member]
Revenues:
Net sales		10	0
Other revenues from operations		0	0
Net gain from investment activities		0	0
Interest and dividend income		0	0
Other (loss) income, net		(3)	0
Total Revenues		7	0
Expenses:
Cost of goods sold		14	0
Other expenses from operations		0	0
Selling, general and administrative		4	0
Restructuring		0	0
Impairment		0	0
Interest expense		1	0
Total Expenses		19	0
Income before income tax expense		(12)	0
Income tax expense		1	0
Net (loss) income		(13)	0
Less: net loss (income) attributable to non-controlling interests		3	0
Net (loss) income attributable to Icahn Enterprises		(10)	0
Supplemental information:
Capital expenditures		2	0
Depreciation and amortization	[1]	1	0
Food Packaging Segment [Member]
Revenues:
Net sales		77	85
Other revenues from operations		0	0
Net gain from investment activities		0	0
Interest and dividend income		0	0
Other (loss) income, net		4	(3)
Total Revenues		81	82
Expenses:
Cost of goods sold		61	66
Other expenses from operations		0	0
Selling, general and administrative		12	12
Restructuring		0	0
Impairment		0	0
Interest expense		3	3
Total Expenses		76	81
Income before income tax expense		5	1
Income tax expense		1	(1)
Net (loss) income		4	0
Less: net loss (income) attributable to non-controlling interests		(1)	0
Net (loss) income attributable to Icahn Enterprises		3	0
Supplemental information:
Capital expenditures		3	4
Depreciation and amortization	[1]	5	5
Real Estate Segment [Member]
Revenues:
Net sales		2	0
Other revenues from operations		16	19
Net gain from investment activities		0	0
Interest and dividend income		0	0
Other (loss) income, net		1	19
Total Revenues		19	38
Expenses:
Cost of goods sold		1	0
Other expenses from operations		10	11
Selling, general and administrative		3	3
Restructuring		0	0
Impairment		0	0
Interest expense		1	1
Total Expenses		15	15
Income before income tax expense		4	23
Income tax expense		0	0
Net (loss) income		4	23
Less: net loss (income) attributable to non-controlling interests		0	0
Net (loss) income attributable to Icahn Enterprises		4	23
Supplemental information:
Capital expenditures		0	0
Depreciation and amortization	[1]	5	5
Home Fashion Segment [Member]
Revenues:
Net sales		50	47
Other revenues from operations		0	0
Net gain from investment activities		0	0
Interest and dividend income		0	0
Other (loss) income, net		1	0
Total Revenues		51	47
Expenses:
Cost of goods sold		42	40
Other expenses from operations		0	0
Selling, general and administrative		9	8
Restructuring		0	0
Impairment		0	0
Interest expense		0	0
Total Expenses		51	48
Income before income tax expense		0	(1)
Income tax expense		0	0
Net (loss) income		0	(1)
Less: net loss (income) attributable to non-controlling interests		0	0
Net (loss) income attributable to Icahn Enterprises		0	(1)
Supplemental information:
Capital expenditures		2	2
Depreciation and amortization	[1]	2	2
Holding Company [Member]
Revenues:
Net sales		0	0
Other revenues from operations		0	0
Net gain from investment activities		9	(14)
Interest and dividend income		2	1
Other (loss) income, net		0	0
Total Revenues		11	(13)
Expenses:
Cost of goods sold		0	0
Other expenses from operations		0	0
Selling, general and administrative		4	7
Restructuring		0	0
Impairment		0	0
Interest expense		73	72
Total Expenses		77	79
Income before income tax expense		(66)	(92)
Income tax expense		19	(1)
Net (loss) income		(85)	(93)
Less: net loss (income) attributable to non-controlling interests		0	0
Net (loss) income attributable to Icahn Enterprises		(85)	(93)
Supplemental information:
Capital expenditures		0	0
Depreciation and amortization	[1]	0	0
Icahn Enterprises Holdings [Member]
Revenues:
Net sales		3,548	3,565
Other revenues from operations		446	329
Net gain from investment activities		(936)	591
Interest and dividend income		42	53
Other (loss) income, net		27	(27)
Total Revenues		3,127	4,511
Expenses:
Cost of goods sold		3,123	3,125
Other expenses from operations		246	155
Selling, general and administrative		518	477
Restructuring		15	12
Impairment		577	1
Interest expense		241	270
Total Expenses		4,720	4,040
Income before income tax expense		(1,593)	471
Income tax expense		(16)	(49)
Net (loss) income		(1,609)	422
Less: net loss (income) attributable to non-controlling interests		772	(261)
Net (loss) income attributable to Icahn Enterprises		(837)	161
Supplemental information:
Amortization included in interest expense		4	3
Icahn Enterprises Holdings [Member] | Investment Segment [Member]
Expenses:
Interest expense		87	123
Net (loss) income		(983)	396
Net (loss) income attributable to Icahn Enterprises		(450)	184
Icahn Enterprises Holdings [Member] | Automotive Segment [Member]
Expenses:
Interest expense		39	36
Net (loss) income		28	(20)
Net (loss) income attributable to Icahn Enterprises		21	(18)
Icahn Enterprises Holdings [Member] | Energy Segment [Member]
Expenses:
Interest expense		11	12
Net (loss) income		(614)	75
Net (loss) income attributable to Icahn Enterprises		(353)	43
Icahn Enterprises Holdings [Member] | Metals Segment [Member]
Expenses:
Interest expense		0	0
Net (loss) income		(6)	(9)
Net (loss) income attributable to Icahn Enterprises		(6)	(9)
Icahn Enterprises Holdings [Member] | Railcar Segment [Member]
Expenses:
Interest expense		23	20
Net (loss) income		50	44
Net (loss) income attributable to Icahn Enterprises		36	27
Icahn Enterprises Holdings [Member] | Gaming Segment [Member]
Expenses:
Interest expense		3	3
Net (loss) income		6	7
Net (loss) income attributable to Icahn Enterprises		3	5
Icahn Enterprises Holdings [Member] | Mining segment [Member]
Expenses:
Interest expense		1	0
Net (loss) income		(13)	0
Net (loss) income attributable to Icahn Enterprises		(10)	0
Icahn Enterprises Holdings [Member] | Food Packaging Segment [Member]
Expenses:
Interest expense		3	3
Net (loss) income		4	0
Net (loss) income attributable to Icahn Enterprises		3	0
Icahn Enterprises Holdings [Member] | Real Estate Segment [Member]
Expenses:
Interest expense		1	1
Net (loss) income		4	23
Net (loss) income attributable to Icahn Enterprises		4	23
Icahn Enterprises Holdings [Member] | Home Fashion Segment [Member]
Expenses:
Interest expense		0	0
Net (loss) income		0	(1)
Net (loss) income attributable to Icahn Enterprises		0	(1)
Icahn Enterprises Holdings [Member] | Holding Company [Member]
Expenses:
Interest expense		73	72
Net (loss) income		(85)	(93)
Net (loss) income attributable to Icahn Enterprises		$ (85)	$ (93)

[1] Excludes amounts related to the amortization of deferred financing costs and debt discounts and premiums included in interest expense in the amounts of $4 million and $3 million for the three months ended March 31, 2016 and 2015, respectively.