Segment Reporting, Income Statements (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013 reporting_segments		Jun. 30, 2012
Segment Reporting Information [Line Items]
Number of reportable segments					9
Revenues:
Net sales	$ 4,497		$ 3,707		$ 9,071		$ 6,106
Other revenues from operations	203		204		392		396
Net gain from investment activities	(228)		299		350		357
Interest and dividend income	52		17		76		42
Other (loss) income, net	94		(1)		48		9
Total Revenues	4,618		4,226		9,937		6,910
Expenses:
Cost of goods sold	3,887		3,252		7,780		5,324
Other expenses from operations	105		108		205		214
Selling, general and administrative	313		336		682		645
Restructuring	9		9		17		16
Impairment	5		32		5		34
Interest expense	126		129		260		246
Total Expenses	4,445		3,866		8,949		6,479
Income before income tax benefit (expense)	173		360		988		431
Income tax (expense) benefit	(97)		101		(217)		131
Net income	76		461		771		562
Less: net income attributable to non-controlling interests	(22)		(204)		(440)		(256)
Net income attributable to Icahn Enterprises	54		257		331		306
Supplemental information:
Capital expenditures	(231)		(232)		(509)		(429)
Depreciation and amortization	159	[1]	133	[1]	314	[1]	233	[1]
Amortization included in interest expense	7		12		16		20
Investment Segment [Member]
Revenues:
Net sales	0		0		0		0
Other revenues from operations	0		0		0		0
Net gain from investment activities	(217)		280		361		330
Interest and dividend income	49		14		72		37
Other (loss) income, net	0		1		2		(1)
Total Revenues	(168)		295		435		366
Expenses:
Cost of goods sold	0		0		0		0
Other expenses from operations	0		0		0		0
Selling, general and administrative	12		8		40		11
Restructuring	0		0		0		0
Impairment	0		0		0		0
Interest expense	2		0		2		2
Total Expenses	14		8		42		13
Income before income tax benefit (expense)	(182)		287		393		353
Income tax (expense) benefit	0		0		0		0
Net income	(182)		287		393		353
Less: net income attributable to non-controlling interests	110		(171)		(232)		(205)
Net income attributable to Icahn Enterprises	(72)		116		161		148
Supplemental information:
Capital expenditures	0		0		0		0
Depreciation and amortization	0		0	[1]	0	[1]	0	[1]
Automotive Segment [Member]
Revenues:
Net sales	1,786		1,704		3,499		3,468
Other revenues from operations	0		0		0		0
Net gain from investment activities	0		0		0		0
Interest and dividend income	1		1		1		2
Other (loss) income, net	0		4		(33)		13
Total Revenues	1,787		1,709		3,467		3,483
Expenses:
Cost of goods sold	1,506		1,450		2,971		2,937
Other expenses from operations	0		0		0		0
Selling, general and administrative	175		186		374		387
Restructuring	8		8		16		14
Impairment	2		28		2		29
Interest expense	27		35		58		71
Total Expenses	1,718		1,707		3,421		3,438
Income before income tax benefit (expense)	69		2		46		45
Income tax (expense) benefit	13		29		24		20
Net income	56		31		22		65
Less: net income attributable to non-controlling interests	(14)		(9)		(9)		(19)
Net income attributable to Icahn Enterprises	42		22		13		46
Supplemental information:
Capital expenditures	(93)		(93)		(186)		(223)
Depreciation and amortization	73		71	[1]	144	[1]	140	[1]
Energy Segment [Member]
Revenues:
Net sales	2,221		1,412	[2]	4,573		1,412	[2]
Other revenues from operations	0		0	[2]	0		0	[2]
Net gain from investment activities	0		0	[2]	0		0	[2]
Interest and dividend income	1		0	[2]	1		0	[2]
Other (loss) income, net	119		(2)	[2]	105		(2)	[2]
Total Revenues	2,341		1,410	[2]	4,679		1,410	[2]
Expenses:
Cost of goods sold	1,939		1,261	[2]	3,906		1,261	[2]
Other expenses from operations	0		0	[2]	0		0	[2]
Selling, general and administrative	34		35	[2]	68		35	[2]
Restructuring	0		0	[2]	0		0	[2]
Impairment	0		0	[2]	0		0	[2]
Interest expense	12		10	[2]	27		10	[2]
Total Expenses	1,985		1,306	[2]	4,001		1,306	[2]
Income before income tax benefit (expense)	356		104	[2]	678		104	[2]
Income tax (expense) benefit	94		(35)	[2]	194		(35)	[2]
Net income	262		69	[2]	484		69	[2]
Less: net income attributable to non-controlling interests	(106)		(16)	[2]	(177)		(16)	[2]
Net income attributable to Icahn Enterprises	156		53	[2]	307		53	[2]
Supplemental information:
Capital expenditures	(51)		31	[2]	(115)		31	[2]
Depreciation and amortization	51		30	[1],[2]	101	[1]
Metals Segment [Member]
Revenues:
Net sales	0		0		494		635
Other revenues from operations	149		164		0		0
Net gain from investment activities	0		0		0		0
Interest and dividend income	0		0		0		0
Other (loss) income, net	0		(6)		0		1
Total Revenues	230		304		494		636
Expenses:
Cost of goods sold	0		0		503		642
Other expenses from operations	73		82		0		0
Selling, general and administrative	56		64		14		14
Restructuring	0		0		0		0
Impairment	2		2		0		0
Interest expense	3		4		0		0
Total Expenses	242		318		517		656
Income before income tax benefit (expense)	(12)		(14)		(23)		(20)
Income tax (expense) benefit	(1)		(2)		(10)		4
Net income	(7)		(14)		(13)		(16)
Less: net income attributable to non-controlling interests	(6)		(2)		0		0
Net income attributable to Icahn Enterprises	(7)		(14)		(13)		(16)
Supplemental information:
Capital expenditures	(3)		(7)		(6)		(9)
Depreciation and amortization	6		6	[1]	12	[1]	12	[1]
Railcar Segment [Member]
Revenues:
Net sales	116		135		226		299
Other revenues from operations	34		20		60		37
Net gain from investment activities	0		0		2		0
Interest and dividend income	0		1		1		2
Other (loss) income, net	(1)		0		(2)		0
Total Revenues	149		156		287		338
Expenses:
Cost of goods sold	90		107		176		244
Other expenses from operations	19		14		36		28
Selling, general and administrative	4		8		15		14
Restructuring	0		0		0		0
Impairment	0		0		0		0
Interest expense	1		5		4		10
Total Expenses	114		134		231		296
Income before income tax benefit (expense)	35		22		56		42
Income tax (expense) benefit	14		(9)		26		(17)
Net income	21		13		30		25
Less: net income attributable to non-controlling interests	(11)		(6)		(19)		(11)
Net income attributable to Icahn Enterprises	10		7		11		14
Supplemental information:
Capital expenditures	(55)		(78)		(156)		(119)
Depreciation and amortization	8		6	[1]	15	[1]	11	[1]
Gaming Segment [Member]
Revenues:
Net sales	93		86		0		0
Other revenues from operations	0		0		292		319
Net gain from investment activities	0		0		0		0
Interest and dividend income	0		0		0		0
Other (loss) income, net	(24)		(2)		0		(8)
Total Revenues	149		158		292		311
Expenses:
Cost of goods sold	70		67		0		0
Other expenses from operations	0		0		145		162
Selling, general and administrative	12		11		117		126
Restructuring	0		0		0		0
Impairment	0		0		2		2
Interest expense	6		5		7		6
Total Expenses	134		152		271		296
Income before income tax benefit (expense)	15		6		21		15
Income tax (expense) benefit	(2)		0		1		(1)
Net income	16		4		20		14
Less: net income attributable to non-controlling interests	5		0		(7)		(4)
Net income attributable to Icahn Enterprises	10		2		13		10
Supplemental information:
Capital expenditures	(23)		(11)		(35)		(23)
Depreciation and amortization	8		7	[1]	16	[1]	16	[1]
Food Packaging Segment [Member]
Revenues:
Net sales	230		303		181		169
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		1		(24)		(2)
Total Revenues	69		84		157		167
Expenses:
Cost of goods sold	236		311		137		130
Other expenses from operations	0		0		0		0
Selling, general and administrative	6		7		23		24
Restructuring	0		0		0		0
Impairment	0		0		0		0
Interest expense	0		0		11		10
Total Expenses	88		83		171		164
Income before income tax benefit (expense)	(19)		1		(14)		3
Income tax (expense) benefit	(5)		0		0		(1)
Net income	(17)		1		(14)		2
Less: net income attributable to non-controlling interests	0		0		4		(1)
Net income attributable to Icahn Enterprises	(12)		1		(10)		1
Supplemental information:
Capital expenditures	(4)		(11)		(9)		(23)
Depreciation and amortization	6		5	[1]	11	[1]	9	[1]
Real Estate Segment [Member]
Revenues:
Net sales	1		3		2		3
Other revenues from operations	20		20		40		40
Net gain from investment activities	0		0		0		0
Interest and dividend income	0		0		0		0
Other (loss) income, net	0		1		0		2
Total Revenues	21		24		42		45
Expenses:
Cost of goods sold	1		1		1		1
Other expenses from operations	13		12		24		24
Selling, general and administrative	2		4		6		7
Restructuring	0		0		0		0
Impairment	1		0		1		0
Interest expense	1		1		2		2
Total Expenses	18		18		34		34
Income before income tax benefit (expense)	3		6		8		11
Income tax (expense) benefit	0		0		0		0
Net income	3		6		8		11
Less: net income attributable to non-controlling interests	0		0		0		0
Net income attributable to Icahn Enterprises	3		6		8		11
Supplemental information:
Capital expenditures	(1)		(1)		(1)		(1)
Depreciation and amortization	5		6	[1]	11	[1]	11	[1]
Home Fashion Segment [Member]
Revenues:
Net sales	50		64		96		120
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		1		1		2
Total Revenues	51		65		97		122
Expenses:
Cost of goods sold	45		55		86		109
Other expenses from operations	0		0		0		0
Selling, general and administrative	8		9		16		19
Restructuring	1		1		1		2
Impairment	0		2		0		3
Interest expense	0		0		0		0
Total Expenses	54		67		103		133
Income before income tax benefit (expense)	(3)		(2)		(6)		(11)
Income tax (expense) benefit	0		0		0		0
Net income	(3)		(2)		(6)		(11)
Less: net income attributable to non-controlling interests	0		0		0		0
Net income attributable to Icahn Enterprises	(3)		(2)		(6)		(11)
Supplemental information:
Capital expenditures	(1)		0		(1)		0
Depreciation and amortization	2		2	[1]	4	[1]	4	[1]
Holding Company [Member]
Revenues:
Net sales	0		0		0		0
Other revenues from operations	0		0		0		0
Net gain from investment activities	(11)		19		(13)		27
Interest and dividend income	1		1		1		1
Other (loss) income, net	(1)		1		(1)		4
Total Revenues	(11)		21		(13)		32
Expenses:
Cost of goods sold	0		0		0		0
Other expenses from operations	0		0		0		0
Selling, general and administrative	4		4		9		8
Restructuring	0		0		0		0
Impairment	0		0		0		0
Interest expense	74		69		149		135
Total Expenses	78		73		158		143
Income before income tax benefit (expense)	(89)		(52)		(171)		(111)
Income tax (expense) benefit	(16)		118		(18)		161
Net income	(73)		66		(153)		50
Less: net income attributable to non-controlling interests	0		0		0		0
Net income attributable to Icahn Enterprises	(73)		66		(153)		50
Supplemental information:
Capital expenditures	0		0		0		0
Depreciation and amortization	0		0	[1]	0	[1]	0	[1]
Icahn Enterprises Holdings [Member]
Revenues:
Net sales	4,497		3,707		9,071		6,106
Other revenues from operations	203		204		392		396
Net gain from investment activities	(228)		299		350		357
Interest and dividend income	52		17		76		42
Other (loss) income, net	94		(1)		48		9
Total Revenues	4,618		4,226		9,937		6,910
Expenses:
Cost of goods sold	3,887		3,252		7,780		5,324
Other expenses from operations	105		108		205		214
Selling, general and administrative	313		336		682		645
Restructuring	9		9		17		16
Impairment	5		32		5		34
Interest expense	126		129		260		246
Total Expenses	4,445		3,866		8,949		6,479
Income before income tax benefit (expense)	173		360		988		431
Income tax (expense) benefit	(97)		101		(217)		131
Net income	76		461		771		562
Less: net income attributable to non-controlling interests	(22)		(204)		(440)		(256)
Net income attributable to Icahn Enterprises	54		257		331		306
Supplemental information:
Amortization included in interest expense	7		12		16		20
Icahn Enterprises Holdings [Member] | Investment Segment [Member]
Expenses:
Interest expense	2		0		2		2
Net income	(182)		287		393		353
Net income attributable to Icahn Enterprises	(72)		116		161		148
Icahn Enterprises Holdings [Member] | Automotive Segment [Member]
Expenses:
Interest expense	27		35		58		71
Net income	56		31		22		65
Net income attributable to Icahn Enterprises	42		22		13		46
Icahn Enterprises Holdings [Member] | Energy Segment [Member]
Expenses:
Interest expense	12		10		27		10
Net income	262		69		484		69
Net income attributable to Icahn Enterprises	156		53		307		53
Icahn Enterprises Holdings [Member] | Metals Segment [Member]
Expenses:
Interest expense	0		0		0		0
Net income	(7)		(14)		(13)		(16)
Net income attributable to Icahn Enterprises	(7)		(14)		(13)		(16)
Icahn Enterprises Holdings [Member] | Railcar Segment [Member]
Expenses:
Interest expense	1		5		4		10
Net income	21		13		30		25
Net income attributable to Icahn Enterprises	10		7		11		14
Icahn Enterprises Holdings [Member] | Gaming Segment [Member]
Expenses:
Interest expense	3		4		7		6
Net income	16		4		20		14
Net income attributable to Icahn Enterprises	10		2		13		10
Icahn Enterprises Holdings [Member] | Food Packaging Segment [Member]
Expenses:
Interest expense	6		5		11		10
Net income	(17)		1		(14)		2
Net income attributable to Icahn Enterprises	(12)		1		(10)		1
Icahn Enterprises Holdings [Member] | Real Estate Segment [Member]
Expenses:
Interest expense	1		1		2		2
Net income	3		6		8		11
Net income attributable to Icahn Enterprises	3		6		8		11
Icahn Enterprises Holdings [Member] | Home Fashion Segment [Member]
Expenses:
Interest expense	0		0		0		0
Net income	(3)		(2)		(6)		(11)
Net income attributable to Icahn Enterprises	(3)		(2)		(6)		(11)
Icahn Enterprises Holdings [Member] | Holding Company [Member]
Expenses:
Interest expense	74		69		149		135
Net income	(73)		66		(153)		50
Net income attributable to Icahn Enterprises	$ (73)		$ 66		$ (153)		$ 50

[1] Excludes amounts related to the amortization of deferred financing costs and debt discounts and premiums included in interest expense in the amounts of $7 million and $12 million for the three months ended June 30, 2013 and 2012, respectively, and $16 million and $20 million for the six months ended June 30, 2013 and 2012, respectively.

[2] Energy segment results are for the period May 5, 2012 through June 30, 2012.